The Gas-geology Law And Gas Forecasting On Wugou Mine

Huaibei Coal complex geological structure, coal-bearing basins strong late reformation, coal and coalbed methane resources in terms of occurrence is more complicated; gas disaster in recent years, frequent accidents, of gas deposit law, analysis of regional gas distribution geological factors controlling the production of the mine's safety play a guiding role. Methane gas is a complex geological body, stored in the coal seam and surrounding rock. Gas in coal reservoir in the occurrence and distribution of controlled by the geological conditions, there are significant gas geology.In this study, the use of gas geology methods, movement of gas geological theory - gas deposit sequential control theory, Wugou mine gas deposit law; In-depth study of geological evolution (tectonic evolution, sedimentary burial history, thermal history); of Wugou Mine coal gas occurrence and development of structural characteristics.The results show that: Wugou mine by the arc of the belt Xuhuai role and Yanshan NNE compression structure to the role of coalfield in both the development of nearly SN, NW to the structure, but also development of a NNE, NE trending structures. Also, because of Bengbu SN compression uplift the transformation of the formation of some EW trending structures; in many areas of structural composite overlay, compare tectonic stress concentration is to construct the best areas of coal development, coal and gas outburst danger zone.Plane partitions, zoning profile is Mine of the basic characteristics of coal gas deposit. Coal seam of No.72,No.81 and No. 82 to thinning with growth mainly coal, 10 coal seam to the main fault zone development. This is the No.10 coal seam gas group in coal gas is relatively small, the main factor. Roof and floor rock of coal group in the mostly shales, soft rock, tectonic stress in a multi-layer under the action of sliding, bending and creep, so that changes in coal seam thickness, forming a number of thinning and thickening with a band. No.10 coal is the main faults, No.10 coal roof with thick sandstone, rocks are relatively hard, the tectonic stress, brittle fracture hard rock formation extending into the coal seam faults, well preserved coal structure, crack growth, this is conducive to gas release.