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Through the analysis of the surrounding rock, coal seam burial depth, coalquality and hydrologic geological condition, the methane-bearing property characteristicsof the coal reservoir in the Gemudi syncline were elucidated.Most of the wall rock of thecoal reservoir is mudstone and silt, which is a favourable enclosing terrane.Burial depth ofthe main excavating coal seam is moderate.The groundwater activity is thin, and thereare absolute groundwater systems between each coal seam, which make poor interconnectionsto accelerate CBM enrichment.In our research, the area coal reservoir metamorphosisis high, CBM content is high, hole-cranny system development degree is high,and permeability of the great mass of the main coal seam exceeds 0.1×10~(-3) μm~2.The resultdemonstrates that the southeast of the Gemudi syncline has the best conditions forprospecting and exploiting CBM.
Through the analysis of the surrounding rock, coal seam burial depth, coalquality and hydrologic geological condition, the methane-bearing property characteristics of the coal reservoir in the Gemudi syncline were elucidated. Host of the wall rock of the coal reservoir is mudstone and silt, which is a favourable enclosing terrane.Burial depth of the main excavating coal seam is moderate. The groundwater activity is thin, and there are absolute groundwater systems between each coal seam, which make poor interconnection accelerate the CBM enrichment. In our research, the area coal reservoir metamorphosis is high, CBM content is high, hole-cranny system development degree is high, and permeability of the great mass of the main coal seam exceeds 0.1 × 10 -3 m 2 ~ 2. The result indicates that the southeast of the Gemudi syncline has the best conditions forprospecting and exploiting CBM.