河北省煤矿区瓦斯赋存构造控制

Gas deposit structural features of coal mines in Hebei province

通过对河北省7个煤与瓦斯突出矿井、12个高瓦斯矿井、32个低瓦斯矿井煤矿区瓦斯地质特征的研究,提出了河北省瓦斯赋存构造逐级控制理论,华北板块构造控制河北省瓦斯分布,区域构造控制各矿区瓦斯分布,矿井构造控制采区、采面瓦斯.厘定出开平煤田北西翼高突带、下花园八宝山高突带、邯邢煤田鼓山东侧深部高瓦斯带和兴隆-宽城-松树台高瓦斯带4个高瓦斯带.研究表明:河北省内煤矿区高突瓦斯矿井的分布受控于EW向燕山褶皱带和NNE太行山构造带两大构造带,具有分带特征,太行山东麓的瓦斯由于深大断裂和地下水的控制而呈现"西低东高,南小北大"的态势,燕山褶皱带受燕山期NW-SE向水平挤压作用发育有逆冲推覆构造,密集发育的逆断层造成煤层叠瓦式分布有利于瓦斯的保存,80%矿井含煤地层集中在石炭二叠系,石炭二叠系瓦斯突出危险性要比侏罗系煤层大.

Based on the research on gas geological characteristics of 7 coal and gas outburst mines, 12 high gas mines and 32 low gas mines in Hebei province, the plate structure gas occurrence theory was proposed. North China plate tectonics control the gas distribution of Hebei provenice, and the distribution of gas in each mine is controlled by regional structure. The gases in the mining areas and mining faces are controlled by mine structure. The mining area in Hebei province is divided into four high gas zones including northwestern of Kaiping coal field, Xiahuayuan-Babaoshan area, eastern of Gu Mountain in deep of Handan-Xingtai coal field and Xinlong-Kuancheng-Songshutai cities. The research results show that the distribution of high gas in outburst mine with zoning characteristics is controlled by fold belt of EW-trending Yans- han Mountain and NNE-trending structural belt of Taihang Mountain. For deep fault and groundwater, gas is low in the southwestern part of eastern Taihang Mountain and high in the northeastern part of eastern Taihang Mountain. The Yanshan fold belt developed thrust nappe structure for NW-SE trending horizontal direction squeezing action in Yanshanian epoch. The imbricate distribution of coal caused by intensive development of reverse fault is beneficial for gas preservation. 80% of coal-bearing strata in the mines are carboniferous and permian. The gas outburst fatalities of carboniferous and permian are greater than those of jurassic.