火成岩侵入对矿井瓦斯涌出与赋存的影响研究

Study on Effect of Igneous Intrusion on Gas Emission and Gas Occurrence

火成岩侵入是造成矿井瓦斯异常涌出的重要影响因素之一。对火成岩侵入影响下瓦斯涌出量影响进行了研究。预测结果表明:一盘区由于火成岩侵入范围较小,瓦斯涌出量为9.49~14.19 m^3/min;二盘区火成岩侵入范围较大,瓦斯涌出量为25.49~34.89 m^3/min。造成这种现象的原因在于,火成岩侵入区内,煤体的孔隙发育较丰富,吸附瓦斯的能力较强,主要体现在郎格缪尔吸附体积和瓦斯含量的升高。研究结果可为火成岩侵入区的瓦斯预防提供指导。

Igneous intrusion is an important factor that affects abnormal gas emission. Effect of igneous intrusion on gas emission in mining panel was studied. The results show that the gas emission in Panel Ⅰ which has smaller igneous intrusion zone was 9. 49 ~ 14. 19m^3/ min and and it was 25. 49 ~ 34. 89 m^3/ min in Panel Ⅱ which has larger igneous intrusion zone. The reason was that the coal pores were enriched in the igneous intrusion zone,which led to an increase of Langmuir volume and gas content. The studied results can be guidance to gas prevention in igneous intrusion zone.