The Gas-geology Law And Gas Forecasting In Xinjiang Wudong Mine Area

This paper choose the Wudong mine in Huianan coal as the research object。On the basis of Gas geology woven figure scientific research project of Xinjiang shenhua group east mining area udinese.combining with previous studies information, the tectonic evolution of the Junggar Basin and its southern margin is analyzed. Wudong mine located at the southeast of the Southern Junggar Coalfield, and affected by the role of the thrust Nappe from the front of Bogeda Mountain. So the bigger stratum dip appeared at the two sides of Badaowan syncline which produce a heavy effect on the coal seam occurrence and the preservation and migration of gas. By collecting and finishing the materials of the gas,get the result of With the increase of the mining depth and stress, the more the burial depth, the gas content and emission will get higher. Geological unit of area into gas, Dividing line with Badaowan Syncline shaft, Divided Mining area into South and north wing Gas geology unit.Using the math method Grey relational analysis, this paper get the results that the main controlling factors of the gas occurrence in the north side of syncline were seam depth and thickness while the main controlling factors of the other side were the distance to the coal seam outcrop and seam elevation..The mathematical model of the gas occurrence was built by using the Mathematical methods of multiple regressions. The 45(B1+2)of North wing 203m delimit in depth for lower gas weathered zone. The 43(B3+6)195m delimit in depth for lower gas weathered zone;The 45(B1+2)of South wing of Dahonggou,Xiaohonggou,Jiangou distance to the coal seam outcrop respectively in 634m,674m,714m for lower gas weathered zone. The 43(B3+6)distance to the coal seam outcrop respectively in 381m,264m,160m for lower gas weathered zone.Through the analysis of the field data of the gas and threshold index of the gas outburst, the paper predicts the mine coal and gas outburst. The 45(B1+2)and 43(B3+6)of North wing Coal buried depth respectively in 715m and 521m for Coal and gas outburst danger zone. The 45(B1+2)of South wing there is no Coal and gas outburst danger zone. 43(B3+6)of Jiangou coal mine at distance to the coal seam outcrop in 688m With deep for Coal and gas outburst danger zone.All these examinations provide the beneficial foundation for the further safety production in the coal mine.