岩浆侵入型含瓦斯煤体特性演化及对石门揭煤的影响

Evolution Features of Coal Containing Methane Invaded by Magmatic and Its Impact on Rock Cross-cut Coal Uncovering

通过对海孜矿岩浆侵入含瓦斯煤体进行钻孔取样,采用理论分析和现场试验方法研究岩浆侵入含瓦斯煤体特性演化规律,得出岩浆侵入含瓦斯煤体后煤体变质程度提高,瓦斯极限吸附能力增强0.54倍,煤体强度降低41.17%,瓦斯含量增大1.07倍,瓦斯压力增高3倍,煤与瓦斯突出危险性高、强度大。结合COMSOL-Multiphysics模拟覆岩为岩浆岩和砂岩的应力分布规律,结论与现场试验结果相符。

Through the sample analysis of magmatic rock invaded coal containing gas in Haizi Mine,studying the evolutive laws of coal containing methane invaded by magmatic using theoretical analysis and field test. We obtain the conclusions that after the coal is invaded by magmatic,the degree of coal metamorphism is improved,and gas adsorption limit increases 0. 54 times,the strength decreases by 41. 17%,gas content increases 1. 07 times,gas pressure increases 3 times,the possibility of coal and gas outburst improves accordingly. COMSOL- Multiphysics simulation is combined to study the stress distribution of overlying strata magmatic rocks and sandstone,the conclusion is consistent with the results of the field test.