顺层钻孔预抽煤层瓦斯在区域防突治理中的应用

Application of pre-pumping coal seam gas using the bedding drilling in the regional outburst prevention and treatment

大宁煤矿304工作面3号煤层处于突出危险区,采用了顺层钻孔预抽瓦斯煤层瓦斯的方法进行区域防突治理,确定了合理的钻场数量,钻孔间距等参数。通过区域评价单元的划分进行效果检验,检验结果表明:预抽煤层瓦斯后,煤层最大残余瓦斯含量值为6.43m^3/t,最大可解吸量瓦斯量为3.84m^3/t,小于8m^3/t。工作面瓦斯抽采效果达标,成功消除工作面煤体突出危险。

Daning Coal Mine 304 working face of No. 3 coal seam is in outburst danger zone, the method of prepumpingcoal seam gas using the bedding drilling was used in the regional outburst prevention management, thereasonable drilling field number and borehole spacing parameters were determined. Tests the effect with the divisionof the regional evaluation unit, the test results show that: after pre-pumping coal seam gas ,the maximum residual gascontent value is 6.43m3/t, the maximum solutions gas desorption quantity is 3.84m3/t, is less than 8m3/T. The workingface gas drainage effect is up to the standard, which successfully eliminated the working face coal outburst danger.