斯派尔煤矿上保护层防突技术及保护范围研究

Study on Outburst Prevention Technology and Protection Scope of Upper Protective Layer in Sipaier Coal Mine

为了确定斯派尔煤矿上保护层C8煤层开采后对下被保护层C9煤层的影响,根据工作面实际布置及开采条件进行了保护范围的确定,分析了瓦斯含量分布及残余瓦斯压力变化的规律,结果表明,C8煤层开采后,在C9煤层布置的8个钻孔测得的残余瓦斯压力均小于0.4 MPa,所取的4个钻孔中瓦斯含量均小于4 m3/t,上保护层C8煤层的开采消除了C9煤层的突出危险性,保证下保护层开采的安全,为相似开采条件矿井提供参考依据。

In view of the influence of the C8 coal seam on the lower protective layer C9 coal seam after the upper coal seam mining in the Sipaier coal mine,the contents and plans of the protection range are determined,the distribution of gas content and the law of the change of the residual gas pressure are analyzed.The results show that after the mining of the C8 coal seam,the residual gas pressure measured by the 8 boreholes arranged in the C9 coal seam are all less than 0.4 MPa,the gas content in the 4 drilling holes is less than 4 m3/t,the mining of the upper protective layer C8 coal seam eliminates the outstanding danger of the C9 coal seam and ensures the safety of the lower protective layer mining,providing a reference for similar mining conditions.