论文部分内容阅读
前岭煤矿地质构造复杂,岩浆侵蚀严重,已发生多次煤与瓦斯突出。为有效指导该特殊地质条件下的瓦斯治理,基于矿井地质构造和岩浆岩侵蚀情况,采用实验室测试及现场调查试验研究途径,选择具有代表性的测点,研究复杂地质条件下岩浆岩侵蚀区煤层瓦斯赋存规律。研究结果表明:受上覆岩浆岩热解和变质叠加作用,煤层变质程度增大,区域瓦斯突出判定指标增加;岩浆的高温热解作用,引起了煤层的二次生烃,上覆岩浆岩岩床和向斜轴部低透气性围岩共同对瓦斯的集聚起到了良好的圈闭作用,从而造成向斜轴部瓦斯压力和瓦斯涌出量增加,煤层瓦斯突出危险性增大。
Qianling Coal Mine has a complex geological formation and serious magmatic erosion. Coal and gas outbursts have occurred many times. In order to effectively guide the gas treatment under the special geological conditions, based on the geological structure of mine and the erosion of magmatic rocks, laboratory test and field investigation are taken to study the measuring points. Representative measuring points are selected to study the erosion of magmatic rocks under complex geological conditions Coal Seam Gas Occurrence Law. The results show that the metamorphism of the coal seam increases with the superimposition of overlying magmatic rocks by pyrolysis and metamorphism, and the determination index of gas outburst in the area increases. The high temperature pyrolysis of magma causes the secondary hydrocarbon generation in the coal seam and overlying magmatic rock bed And the low permeability of the syncline axis rock together to gas accumulation has played a good trapping effect, resulting in synclinal axis gas pressure and gas emission increased, coal seam gas outburst increased risk.