E2303工作面抽采效果评价研究

Evaluation Research on the Extraction Efficiency in E2303 Working Face

以E2303工作面为研究对象,针对其瓦斯赋存特征,建立瓦斯抽采系统,采用进风顺槽、胶带顺槽双向本煤层预抽,对工作面划分为3个抽采评价单元,对其抽采覆盖区域、钻孔均匀程度,抽采后煤层残余瓦斯含量、风排瓦斯量进行综合评价。结果表明,抽采参数设计合理,抽采钻孔布置均匀,抽采效果稳定可靠,消除了煤层瓦斯突出危险。

Taking E2303 working face as the object study, the gas extraction system was set up according to the characteristics of gas storage feature. The mining face was divided into three drainage extraction units by adopting bidirectional coalbed pretreat- ment with inlet and adhesive tape crossheading. This paper made comprehensive assessment for extraction coverage area, uniformity coefficient of drill holes, residual gas content of coal seam after extraction and gas content by wind.The results showed that the extraction parameters were rationally designed, the borehole layout was uniform, and the extraction effect was stable and relia- ble, and the danger of coal seam gas outburst was eliminated.