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Copyright of Coal Science & Technology (0253-2336) is the property of Coal Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Coal Science & Technology (0253-2336) is the property of Coal Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Based on a closed correlativity between the enrichment and formation geological condition of the coalbed methane, from a terrestrial heat flow and geothermal field, palaeotectonic stress field and groundwater dynamic field, the paper stated the enrichment geologic mechanism of Jurassic coalbed methane in Ordos Basin. The study held that low ground thermal temperature could provide favorable conductions to the methane adsorption of coal reservoirs. An organic configuration between the palaeotectonic stress field and the seam fractures would favorable to the enrichment of coalbed methane. The Jurassic aquifer system could play a hydrodynamic sealing role to the enrichment of coalbed methane and some nearly stagnation zone with weak hydrodynamics could be favorable zone of the coalbed methane enrichment. The paper held that the Jurassic coalbed methane formation in Ordos Basin was a typical enrichment mode of the monoclinal structure and the enrichment features of coalbed methane under the mode were restricted by the mutual coupling relationship of each energy field within the geothermal field, hydrodynamics field and tectonic stress field. [ABSTRACT FROM AUTHOR]

Taking Baode Area on the eastern edge of Erdos Basin as an example, using stereographic projection method for level correction, comparing the principal stress orientation before and after restoration of level correction, the regional tectonic stress field was determined. The results show that the regional tectonic features and tectonic movement stress field evolution have good consistency, the regional tectonic stress field is mainly influenced by the Yanshan movement and Himalaya movement, Yanshan tectonic stress field established main tectonic research area of the frame. It's mainly influenced by extrusion stress, supplemented by tensile stress, and also developed the NW-SE extrusion stress and tensile stress in NEE-SWW direction, extrusion should have caused the cover slip phenomenon of power in this region, formed a series of parallel folds and thrust faults in the region development. Some direction of NW-SE normal faults can be found, and tectonic stress field in Himalaj'a is mainly influenced by extrusion stress. Principal compressive stress directions is NE-SW, superposition of two stages of tectonic movements caused the eastern tectonic deflection region from NW-SE to NE-SE. The formation and development of the pattern and the eastern boundary zone are closely related. [ABSTRACT FROM AUTHOR]