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Enhanced coalbed gas drainage based on hydraulic flush from floor tunnels in coal mines
- Source :
- International Journal of Mining, Reclamation and Environment. 30:37-47
- Publication Year :
- 2014
- Publisher :
- Informa UK Limited, 2014.
-
Abstract
- Gas drainage for the single and low gas permeability coal seam is the key technical problem hampering efficient coal mine gas drainage and without which mining safely cannot be realised in China. To solve this problem, this paper presents an engineering method for enhanced coalbed methane recovery based on high-pressure hydraulic flush from floor tunnels. The first step is to evaluate when the likelihood of coal and gas outburst reaches dangerous levels according to coal seam parameters (including coal seam gas contents, gas pressure, permeability and geological conditions). With these parameters in place, the second step is to determine and optimise borehole parameters, such as the effective influencing radius of hydraulic flush, hydraulic flush space between drills and borehole number to make sure that the coal seam stress is fully released and permeability is dramatically increased. What is also included in this step is the employment of a high-pressure hydraulic flush of coal from boreholes drilled fr...
- Subjects :
- Coalbed methane
Petroleum engineering
business.industry
Coal mining
Borehole
ComputerApplications_COMPUTERSINOTHERSYSTEMS
Geology
02 engineering and technology
010502 geochemistry & geophysics
Geotechnical Engineering and Engineering Geology
complex mixtures
01 natural sciences
020501 mining & metallurgy
Permeability (earth sciences)
0205 materials engineering
Gas pressure
Management of Technology and Innovation
otorhinolaryngologic diseases
Coal
Drainage
business
0105 earth and related environmental sciences
Earth-Surface Processes
Subjects
Details
- ISSN :
- 17480949 and 17480930
- Volume :
- 30
- Database :
- OpenAIRE
- Journal :
- International Journal of Mining, Reclamation and Environment
- Accession number :
- edsair.doi...........a4e3a325092f536b9f4633921fc02057