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Study on Gas Occurrence Law in Magma Erosion Area of Qianling Coal Mine
Author(s): 
Pages: 15-19
Year: Issue:  12
Journal: Safety in Coal Mines

Keyword:  magma erosiongas occurrencecoal and gas outburstoutburst indexgas emission;
Abstract: 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。
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