采煤工作面前断层走向与瓦斯运移特征分析  

Characteristics of fault strike and gas migration in front of coal mining working face

作　　者：柴俊清 CHAI Junqing(Shanxi Coal Transportation and Marketing Group Zhangjiawan Coal Industry Co.,Ltd.,Datong 037007,China)

机构地区：[1]山西煤炭运销集团张家湾煤业有限公司,山西大同037007

出　　处：《陕西煤炭》2024年第9期64-68,73,共6页Shaanxi Coal

摘　　要：天然地质体中的煤是典型的非均质的,潜在含有广泛分布的断层,这些断层影响着瓦斯的运移,并与煤与瓦斯突出的发生密切相关。为了分析采煤工作面前断层走向和瓦斯运移特征,通过数值模拟来描述完整和非均质煤在开采过程中的渗透率。基于数值模拟揭示了工作面前方较高的瓦斯压力梯度,主要是由于沿断层的低渗透区的阻挡作用导致了高压瓦斯区的形成。现场实测证实,该区域瓦斯含量是普通煤的2~3倍,该模型可用于指导煤矿瓦斯动力灾害防治措施的理论评估。Coal in the natural geological body is typical heterogeneous and potentially contains widely distributed faults.These faults affect the migration of gas and are closely related to the occurrence of coal and gas outburst.In order to analyze the fault strike and gas migration characteristics in front of the coal mining face,the permeability of complete and heterogeneous coal during mining is described by numerical simulation in this study.It is revealed that the higher gas pressure gradient in front of the working face is mainly due to the blocking effect of the low permeability zone along the fault,which leads to the formation of the high pressure gas zone.The field test confirms that the gas content in this area is 2~3 times that of ordinary coal.The model can be used to guide the theoretical evaluation of gas dynamic disaster prevention and control measures in coal mines.

关 键 词：煤与瓦斯突出 煤的渗透性 气体运移 

分 类 号：TD712[矿业工程—矿井通风与安全]