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Because the seabed is covered with deep slit soil and seawater layer, the characteristics between offshore and onshore ground motions are significantly different. Besides, compared with sea-crossing bridges and other marine structures, the seismic response of immersed tunnels buried under seabed can be influenced by the site condition more significantly. Therefore, it is necessary to study the effects of seawater depth, site condition and offshore ground motion on the seismic response of immersed tunnels. Firstly, offshore strong motion records from the K-NET are grouped with different epicentral distances, magnitudes, and stations, and the response spectra of offshore ground motions in different groups are compared. Then, a numerical simulation model with the water layer, offshore soil layer and immersed tube tunnel coupling is established. The seismic responses of the tunnel and the seabed site are compared by inputting offshore and onshore ground motions respectively. Finally, the effects of seawater depth, incidence angle, slit soft soil layer and buried depth on the seismic response of tunnel and local seabed site are systematically studied by inputting P wave and SV wave pulses respectively. The results show that the silt soft soil layer will make the horizontal seismic response of the immersed tunnel more serious under SV wave incidence. The vertical seismic responses of the immersed tunnel and seabed are suppressed by the seawater layer under P wave incidence, and the response will decrease with seawater depth increasing. Besides, the effect of the buried depth and incidence angle on the seismic response of the immersed tunnel is limited. [ABSTRACT FROM AUTHOR]

Fiber metal laminates (FMLs) are widely applied as protective structures in various high-tech industries owing to their excellent impact resistance. This paper presents an explicit finite element (FE) simulation to investigate the dynamic damage behavior of carbon fiber-reinforced aluminum laminates (CRALLs) under combined explosion and fragment loading. Johnson-Cook model is utilized to capture the damage response of aluminum material; 3D Hashin failure criteria are applied to predict the damage evolution of fiber composite material considering the high strain rate effect; cohesive elements are incorporated to simulate the inter-laminar delamination phenomena. The effectiveness of the proposed numerical model is verified through a comparison with available experimental data in ballistic impact conditions. In addition, a thorough analysis of the dynamic behavior and damage mechanism of FMLs is conducted, and the impact performance is extensively discussed in terms of the influences of explosion distance and explosion mass. This work serves as a valuable reference for future numerical studies on the explosive impact resistance of other FMLs structures. [ABSTRACT FROM AUTHOR]

3D woven fabrics possess excellent specific performance and processability, making them highly favorable in the field of protective engineering, particularly in applications such as body armor. It is critical to evaluate their ballistic response under various impact loadings for both material manufacturing and application purposes. This paper presents a full-size mesoscale finite element model to investigate the dynamic damage behavior of 3D angle-interlock woven fabric (3DAWF) under ballistic impact. The effectiveness of the proposed numerical model is verified through a comparison with available experimental data in terms of ballistic performance and damage morphology. The effects of projectile shape, impact angle, and pre-stretching loading on the ballistic performance of 3DAWF are discussed. It is observed that 3DAWF demonstrates different impact resistance with different projectile shapes due to variations in the impact area and damage mechanism. The friction generated by projectile sliding plays a significant role in dissipating projectile kinetic energy under oblique impact. Moreover, pre-stretching is found to enhance the ballistic limit and energy absorption of 3DAWF to a certain extent. [ABSTRACT FROM AUTHOR]

With the development of railway technology, high-speed trains have been invested in practical operation increasingly. The traffic accident that train runs at high speed will cause casualties and property losses. The energy absorption tube can effectively alleviate the damage of the vehicle in the collision process and protect passengers in the buffering process. In this paper, nested corrugation square energy-absorbing tubes (NCSTs) with circumferentially cosine profile and different inner structures are analyzed by adopting finite element (FE) simulation. The quasi-static compression tests and proposed theoretical model based on Simplified Super Folding Element (SSFE) theory are employed to validate the effectiveness of numerical models. The simulation results indicates that the crushing modes possess certain sensitiveness to cross-sectional conformation and the NCSTs present more stable and orderly deformation modes compared with non-nested tubes. The specific energy absorption (SEA) and crushing force efficiency (CFE) of NCST can be increased by 52.49 and 19.07% compared to ordinary corrugation tube, respectively. In addition, the tube with two-layers octagonal wall (SO1D) is selected as optimal structure because it is ranked first under cases of 40% by adopting the technique for order preference by similarity to ideal solution (TOPSIS) method. Finally, the sensitivity analyses based on SO1D are conducted. The results show that the parametric variation of trib and tout fairly effect on the deformation pattern. And increases in wall thickness t and section size of the middle wall Dmid will all result to increases in initial peak crushing force (IPCF) and significant variation on other crashworthiness criteria. This paper offers certain reference significance for the study of energy-absorbing structures. [ABSTRACT FROM AUTHOR]

The authors performed the optimizations of an auxetic tube considering different structural responses: mass, critical buckling load, natural frequency, Poisson's ratio, and maximum compression load compression. The response surface methodology was applied to generate a metamodeling with a set of non-linear equations. All data were generated via numerical modeling after experimental validation. The Lichtenberg Algorithm was used to find the best possible configurations. This paper shows something unprecedented in the literature when evaluating the static and modal performance of an auxetic tube in a multi-objective problem. The results showed an improvement of up to 43% compared to the initial model. [ABSTRACT FROM AUTHOR]

With bio-mimetic MAV (micro aerial vehicles) becoming increasingly important dual-use equipment, their crashworthiness under impact loads is also considered a key research direction. Based on the micro-morphology of the cross section of the beetle exoskeleton, we proposed the thin-walled structure protection design of several bionic MAV, and used the finite element method to compare the crushing process and energy absorption characteristics of each structure under axial loading, and obtained the thin-walled structure with excellent protection. On this basis, numerical simulation methods were used to study the optimal parameters of the structure, such as impact angle, number of protective layers, and wall thickness. The results show that the energy absorption characteristics of square structure with type #3 are higher than those of all other structures. With the increase of inclination angle, the energy absorption characteristics of the structure generally show a very obvious decreasing trend. The structure with wall thickness of 1.0 mm has better space accommodation and energy absorption ability for bio-mimetic MAV. [ABSTRACT FROM AUTHOR]

In this study, a dynamic caustic experimental system is used to examine the damage distribution characteristics as well as the crack formation/propagation mechanism in polymethyl methacrylate (PMMA) caused by uncoupled eccentric shaped charge blasting under different decoupling coefficients and charge positions. Using PMMA as the experimental material, the damage variables around the hole are calculated by the digital image processing method. The stress wave propagation law under different charge positions is revealed. Furthermore, based on the fractal theory, the damage values of shaped and unshaped cracks are calculated. The results show that the range of the crushed zone and failure zone on the coupled side around the hole of eccentric uncoupled charge is larger than that on the uncoupled side, which can reduce the damage on the reserved side and break the excavation side more fully. Under the condition of eccentric uncoupled charging, the range of the crack zone and failure zone decreases with the increase in the decoupling coefficient. When the decoupling coefficient is 2, the smoothness of the main crack is the best, and the total and average lengths of the main crack are also maximum. The damage distribution caused by explosive crack conforms to the fractal law, and the fractal dimension can accurately represent the damage degree of PMMA after the explosion. [ABSTRACT FROM AUTHOR]

This study focused on the water breakthrough issue that still occurred after water shutoff using gel plugging agents. Taking the heavy oil reservoir with edge-bottom water in the Y oilfield as an example, the study investigated the water cut variations after water shutoff and analyzed the types of water breakthrough characteristics in the wells of this reservoir. The CMG numerical simulation software was used to study the influence of geological parameters on the water cut variations after water shutoff. The research findings revealed that the water breakthrough characteristics in all the treated horizontal wells were classified into low water cut breakthrough, pulse-type breakthrough, step-type breakthrough, and high water cut breakthrough. Additionally, it was observed that horizontal wells in different geological conditions exhibited distinct water breakthrough characteristics under the same water shutoff process conditions. Through numerical simulation and statistical analysis of field data, the main factors influencing the variation of water cut after water shutoff were identified as reservoir permeability, oil saturation, interlayer position, water avoidance height, injection-production well distance, oil viscosity. The research findings allowed for the prediction of water breakthrough characteristics after water shutoff or the analysis of reservoir structure configuration based on known water breakthrough characteristics. [ABSTRACT FROM AUTHOR]

In Western Guizhou, China, multi-layer development is a successful way for CBM development, with drainage rate control being the essential technology. In this article, a coupled hydraulic-mechanical numerical model considering permeability velocity-sensitive damage was established to analyze the impact of drainage rate on the gas production and reservoir parameters of multi-layer CBM development. The CBM development in the study area can be divided into four stages. The permeability velocity-sensitive damage and Jamin effect mainly occurred in the first two stages. Increasing the drainage rate during the first two stages will cause more serious permeability velocity-sensitive damage. Reducing the drainage rate in the first two stages could alleviate the permeability velocity-sensitive damage and Jamin effect. During the stable production stage II, the gas seepage being dominant in the c409 coal seam, the gas production would be significantly reduced under the permeability stress-sensitive damage as the drainage rate increasing. Based on the simulation results, three recommendations concerning the drainage rate optimization of multi-layer CBM development were advanced, and gas production was successfully improved. This study has important theoretical and practical significance for guiding the multi-layer CBM development in Western Guizhou and Southern China. [ABSTRACT FROM AUTHOR]

With the increase of exploration resources of crude oil worldwide, how to decompose by recombination or long chain compounds to convert high viscosity heavy and inferior crude oil into high quality low viscosity oil and chemical raw materials has become the focus of the refining industry. Several types of oil were treated to reduce viscosity with a self-built heavy oil viscosity reduction device based on jet cavitation. Meanwhile, the viscosity-decreasing condition of different operating parameters was analyzed by CFD numerical simulation method. The results showed that the viscosity reduction of Saudi heavy oil is the best at 4 MPa, the viscosity reduction rate reaches 46.97%. The numerical simulation and analysis of different kinds of oil products were carried out, and the pressure, gas holdup, velocity, turbulent kinetic energy, mass transfer rate and cavitation number were used as evaluation criteria. Through the numerical simulation and experimental verification, the application of jet cavitation in viscosity reduction of heavy oil is deeply studied, and an innovative evaluation method for viscosity reduction of jet cavitation which integrated various factors is proposed, which provides theoretical guidance and data support for the oil treatment effect and device selection of jet cavitation in industrial application. [ABSTRACT FROM AUTHOR]

The overburden of marine hydrate sediment is usually a permeable cover, and the presence of permeable overburden directly affects the depressurization effect. However, previous studies have mainly focused on the effect of the permeable overburden without considering seawater infiltration, and the influence of seawater infiltration on the production of hydrate cannot be ignored. In this article, a new numerical model considering seawater infiltration is developed and this study is completed by numerical simulation. The results show that seawater infiltration significantly reduces hydrate dissociation, and the presence of seawater substantially reduces cumulative gas production and increases water production compared to non-permeable overburden, with higher permeability resulting in lower gas production and higher water production. It is an effective means to extract hydrates through lower bottom-hole pressure by increasing the gas–water ratio. It is of great significance to further understand the production characteristics of hydrate reservoirs. [ABSTRACT FROM AUTHOR]

The most widely used method in the self-healing of hot mix asphalt is the capsule method. In this method, the capsules effect the mechanical properties of asphalt mixtures. In order to determine the effect of capsules on the mechanical properties of asphalt mixtures, capsules containing waste vegetable oil in four different ratios (0.25%; 0.50%; 0.75% and 1.00%) were added to the mixtures. The mechanical properties of asphalt mixtures with and without capsules were determined by applying the creep test at single stress (450 kPa). Thanks to these test results, after the capsules written in 4 different ratios were randomly distributed into the sample with Python code, the creep test was carried out under three different constant stresses (300, 450 and 600 kPa) using the finite element method. Finally, the Response Surface Method (RSM) analysis was carried out to evaluate the relationship between variables and permanent deformations, thus it was aimed to gain a statistical perspective to the study. As a result of the simulation, differences caused by the capsules were observed. Accordingly, it was determined that the addition of capsules increased the permanent deformation rate of asphalt mixtures. As a result of the RSM analysis, it is seen that the model performs the analysis with high accuracy. [ABSTRACT FROM AUTHOR]

In this paper, a novel bioinspired hexagonal honeycomb (NBHH) is proposed. Different from the conventional honeycomb (CH), the core wall of the NBHH has a saw-tooth corrugated shape. Firstly, LS-DYNA R11.0 is used to construct a finite element model and conduct experimental verification; then, a comparative analysis is carried out with the CH and the bionic honeycomb sandwich panel (BHSP) with sinusoidal curves, and the proposed NBHH exhibits excellent energy absorption capability under dynamic impact. In particular, compared with the CH and the BHSP with the same wall thickness, the specific energy absorption of the NBHH is 58.60% higher than that of the CH. Compared with the BHSP, the specific energy absorption of the NBHH has increased by 7.23%. Finally, parametric research is carried out on the NBHH. [ABSTRACT FROM AUTHOR]

Deep within coal gangue hills, there is a substantial amount of wasted thermal energy. Prolonged accumulation of these hills leads to significant damage to the atmosphere and soil. Gravity heat pipes, as efficient heat transfer components, can safely, efficiently, and conveniently extract the accumulated heat in gangue hills to achieve effective thermal control. In this study, we first analyzed the optimal height of the heat dissipation fins through a single fin heat dissipation model. Then, we determined the optimum spacing between the heat dissipation fins through analysis with multiple fins. The results showed that when the height of the heat dissipation fins was 80 mm and the spacing between fins was 80 mm, the heat dissipation performance and economic costs were most reasonable. Through an engineering trial conducted for 143 days at the Maotergou coal mine gangue hill, it was found that the average heat dissipation rate of a single gravity heat pipe ranged from 243.52W to 494.32W. The total heat dissipation during the entire experimental process was 54.39 kJ, and the total heat dissipation at the elevation of 890 meters was 1087.71 kJ. This indicates that managing the internal temperature accumulation in coal gangue hills using gravity heat pipes is entirely feasible. [ABSTRACT FROM AUTHOR]

Coal is a major part to stable energy structure. Borehole Grouting is a primary method used for the prevention and control of coal spontaneous combustion in the regenerated roof. However, the construction design of high-position grouting for the regenerated roof lacks a sufficient theoretical foundation due to the limited advancement in theoretical research on the high-position grouting of fracture. To fill the theory research gap of high-position grouting in regenerated roof, a fracture network high-position grouting numerical model was established. Based on the numerical model and assumptions of the equivalent path, a mathematical model of fracture network high-position grouting was established and a global sensitivity analysis was conducted. The results showed that the morphology of slurry diffusion is influenced by gravity and fracture orientation. The diffusion front undergoes three successive phases of transformation: hemispherical diffusion, curved diffusion, and plane diffusion. Based on the mathematical model, the fracture aperture has the largest first-order sensitivity and total-sensitivity index to grouting pressure during the whole phase of grouting. The second-order sensitivity index between fracture aperture and slurry viscosity, grouting pipe radius, grouting rate, dip, and azimuth is greater than other parameters. By focusing on key parameters and their interactions, this research contributes to enhancing the effectiveness of grouting construction while simultaneously reducing design complexity. [ABSTRACT FROM AUTHOR]

Shale is a complex porous medium with multi-scale pores and well-developed fracture networks. This paper aims to use modeling and numerical simulation methods to study the transport of shale gas in a complex multi-scale matrix-fracture system. In this study, mathematical modeling and programming was used to establish digital models of shale gas multi-scale matrix and 3D discrete fracture network. Based on the transport mechanisms of shale gas, this study derives the mathematical models of shale gas transport in different transport media, and uses the finite element method to solve and analysis the transport of shale gas in the multi-scale matrix-fracture system. The model is verified by real shale gas field data. The results show that the fractal dimension of organic pores have great effects on shale gas transport. When the fractal dimension is greater than 1.4, the increase on gas production is particularly obvious. Compared with organic pores, the effect of fractal dimension of inorganic pores is smaller. The existence of the fracture network has an effect of up to 25% on gas production, and the optimal fracture density is 200. [ABSTRACT FROM AUTHOR]

Carbon fiber reinforced composite multilayer damping structures with different types of stiffeners demonstrate excellent mechanical properties. This paper deals with the bending properties analysis of carbon fiber reinforced composite multilayer damping structures with different types of stiffeners for the first time. A theoretical model was constructed to investigate the bending performance of the structure under static loading based on structural stress transfer mechanism between stiffener and composite plate. Moreover, the theoretical solution was compared with the numerical simulation results to confirm their validity. Finally, structural parameters were considered to discuss the change law of the structural center deflection. [ABSTRACT FROM AUTHOR]

Welding buckling deformation is one of the foremost failure modes of thin plate welded structures. It is important to estimate welding buckling for structural design and process optimization. Inherent strain-based welding buckling evaluation methods have been proved to be valid, but the existing methods have low efficiency due to requiring multiple inherent forces. In this study, a novel welding buckling evaluation method based on longitudinal shrinkage force was established. The effectiveness of the proposed method was validated using a butt welded joint. In addition, this method was applied in a large-scale thin plate structure for evaluating the structural stability, the effects of heat input, welding manner, and external constraints on welding deformation and buckling were also discussed. The results reveal that the proposed inherent strain-based welding buckling evaluation method can be used to judge whether welded structures are buckled. The reduction of welding heat input and the use of single-sided welding can mitigate welding deformation. Increasing external constraints can not only reduce the welding deformation, but also improve the welding critical buckling load for preventing welding buckling. [ABSTRACT FROM AUTHOR]

In the western region of China, the coal seam is shallowly buried. Overburden fissures readily develop upwards through the surface, and provide channels for wind to flow into the gob. Here, a model for the coal spontaneous combustion in gob caused by air leakage from fissures in shallow coal seams was established. The accuracy of the model is verified by comparing the oxygen concentration on the inlet and outlet sides of the field monitoring data with the results of numerical simulation. In addition, the distribution of oxygen concentration and wind speed in gob and their influence on spontaneous combustion dangerous zone were studied by numerical simulation when the air leakage volume varied from low to high (36–600 m3/min). The results showed no significant change in the distribution ranges of oxygen concentration and wind speed along the Z-direction when there is no air leakage from the gas conducting fissure in the gob. With the increase of air leakage, the oxidation zone defined by oxygen concentration moves to the depth of the gob, and the oxygen concentration near the fissure increases. In addition, the oxidation zone defined by the wind speed moves significantly deeper into the mining area, and the wind speed is higher at the location corresponding to the fissure close to the working face, and the overall symmetrical distribution of the flow field in the mining area. According to the oxygen concentration and wind speed, the size of dangerous zone initially increased, before decreasing and finally plateauing. [ABSTRACT FROM AUTHOR]

Existing mathematical models for deflector jet hydraulic amplifiers cannot accurately describe the influence of the deflector motion on the receiver jet, which results in calculation differences for the receiver pressure. To deeply investigate this problem, the momentum transfer model considering secondary jet velocity distribution was used to develop an improved model that is more aligned with the actual state of the flow field. In this model, the receiver jet velocity is calculated, for the first time, with a maximum error of 18% when compared with existing models. To verify the improved model, the recovery pressures in the receivers were verified by numerical simulations and experiments. The verification results show that the model can accurately predict the recovery pressures in the receivers within an 8.1% maximum error. This model fills the gaps in the theoretical research and lays a foundation for the structural design of deflector jet pressure servo valves. [ABSTRACT FROM AUTHOR]

In contemporary times, radar and infrared‐compatible stealth materials have emerged as a pivotal domain of research globally, aimed at augmenting the survivability of military assets. However, current candidates generally exhibit subpar compatibility performance in elevated temperature environments due to the imbalanced interplay between the two spectral bands. In this work, a meticulously designed sandwich‐structure SiO2/C@SiC/SiO2 composite is proposed to cope with the challenge. The middle layer of C@SiC composites possesses excellent microwave absorption performance even at high temperatures. The outer layers of SiO2 aerogels serve not only to inhibit the infrared radiation intensity, but also reinforce the microwave absorption capacity by optimizing the impedance matching and reducing the heat transferred to the middle layer. Based on the numerical simulation outcomes, the thickness of each layer has been optimized to attain a harmonious balance between microwave absorption and infrared radiation properties. Ultimately, the sandwich structured SiO2/C@SiC/SiO2 composites demonstrate low RL (reflection loss) values (←5 dB) across nearly the entire X band (8–12 GHz), alongside minimal surface temperatures hovering ≈44 °C at an ambient temperature of 200 °C. The comprehensive investigation into impact patterns and underlying mechanisms offers invaluable insights to develop radar and infrared‐compatible stealth materials for high‐temperature applications, which can be applied as stealth coatings on the skin of high Mach number aircraft. [ABSTRACT FROM AUTHOR]

AbstractThe research focuses on the comprehensive excavation face of Xida Lane in a coal mine belonging to Lu’an Group in Shanxi Province. A comprehensive research approach, combining theoretical analysis, numerical simulation and field measurement, is employed. A new dust isolation and collection device is utilized, along with a ventilation mode that combines upper and lower cylinders. A simulation model is established for the air curtain ventilation system formed by rectangular air outlet, studying the airflow and dust field of the comprehensive excavation face. The findings indicate that when high-speed airflow is injected from the rectangular air outlet, an air curtain forms in front of the comprehensive excavator operator. The majority of the dust generated during excavation is effectively controlled within a specific area, primarily between x = 0 m, x = 1 m, x = 2 m. With increasing distance from the comprehensive excavation face, the concentration of dust in the roadway gradually decreases. At the coordinates of comprehensive excavator operator (x = 5 m, y = 1.5 m, z = 0.4 m), the dust concentration has been successfully reduced to 9.31 mg/m³. This level meets the coal mine safety regulations, which mandate that dust concentrations remain below 10 mg/m³. [ABSTRACT FROM AUTHOR]

In recent years, frequent flooding disasters in China have posed a serious threat to people's production and livelihood. Among them, the capacity of rainwater outlets has a significant impact on the discharge of regional surface rainwater and the overall drainage capacity of the pipeline network. In order to investigate the effect of rain grate blockage on the drainage capacity of the pipeline network, a numerical model of urban rainwater and flood process coupling one-dimensional pipeline network and two-dimensional surface based on the GAST model and SWMM model was built by taking a drainage subdivision in the Xi' an-Xianyang New Area of Shaanxi Province as an example. Based on the results of field investigation, several common rain grate blockage scenarios were identified, and the scenario analysis method was used to simulate and analyze the rainwater collection and drainage process under different rainfall recurrence periods and rain grate blockage states. The rationality of the hydrological model simulation results was verified by using the Nash Efficiency Coefficient (CNCE), with CNCE values of 0.71 and 0.80 respectively. The results indicate that the built model has high simulation accuracy and reliable results. Under extreme rain-fall events with a return period of 100 years, when the rain grate is 75% blocked, the flow capacity is reduced by 57% and when it is 25% blocked, the flow capacity is reduced by 17%. With the increase of rainfall intensity, the drainage capacity of pipe network is greatly affected by the degree of rain grating blockage. [ABSTRACT FROM AUTHOR]

The longevity of solid oxide fuel cells is influenced by internal residual stresses, which may induce deformation or fracturing of components. This study investigates the residual stress distribution at the nonplanar cathode–electrolyte interface by approximating the actual interface with trigonometric functions and developing a three-dimensional (3D) model. The model reveals that the stress patterns at nonplanar interfaces can elucidate the genesis of interfacial cracks. During fabrication, anode contraction results in compressive stress within the electrolyte and tensile stress within the anode, with thermal discrepancies between layers being the primary cause of residual stresses. The reduction process diminishes these stresses, thus enhancing the mechanical integrity of the cell. Mitigating interface nonplanarity is beneficial for minimizing residual stress. At each interface crest, the electrolyte exhibits a local minimum in compressive stress, and a local maximum in shear stress occurs between each crest and trough. Furthermore, decreasing the initial porosity and NiO volume fraction can slightly lessen interlayer thermal discrepancies, with little effect on residual stresses. [ABSTRACT FROM AUTHOR]

Sea-crossing bridges face critical challenges due to scour, which can destabilize foundations. This study investigates the scour characteristics of the large-diameter main pier of the Haiwen Bridge, with a pile diameter of 4.3 meters. Seabed changes were monitored over 630 days using field tests and numerical simulations. The study analyzed the relationship between flow velocity and scour depth, revealing that the maximum recorded scour depth was 3.65 meters at the upstream side. A linear regression model, developed from 75 sets of field data, produced a formula to estimate maximum local scour depth. Validation against field measurements showed a strong correlation, with the calculated values deviating by less than 10% from observed data. The findings indicate that upstream scour pits were 1.5 times wider and deeper than those downstream, while a shallow triangular scour zone, extending 1.2 times the pile diameter, formed downstream. Recommendations for scour protection include hydrological considerations, particularly on the upstream side and areas lacking sediment sources. [ABSTRACT FROM AUTHOR]

Effective coalbed methane extraction from soft coal seams is essential for mine safety and energy supply. To enhance the extraction efficiency of coal mine methane (CMM) and reduce the risk of gas outbursts in coal mining areas, we developed an original and innovate horizontal well hydraulic cavitation method. A mathematical model that can quantitatively optimize construction parameters and improve the effectiveness of engineering applications was also constructed to calculate the technological parameters of this construction method. This technology differs from traditional approaches by relying on hydraulic erosion rather than water jets, and it can be implemented in cased horizontal wells. Utilizing the mathematical model grounded in porous media theory and Darcy’s law, numerical simulations with COMSOL Multiphysics were conducted and construction parameters optimized. The proposed technology significantly advances safe and efficient coalbed methane recovery, benefiting coal mine safety and environmental sustainability. [ABSTRACT FROM AUTHOR]