竹林山矿顺层钻孔抽采间距的确定

Determination of Drainage Spacing Between Bedding Boreholes in Zhulinshan Coal Mine

为了高效、低成本地抽采煤层中的瓦斯,运用理论计算和现场测试两种方法对钻孔抽采的影响范围进行了研究。研究结果表明,顺层钻孔抽采影响范围在前期随着抽采时间的延长而增加。现场基于钻孔瓦斯压力的变化,通过分析不同抽采时间下钻孔有效抽采半径,确定了预抽60d有效抽采半径为2.5m,为竹林山煤矿瓦斯治理提供了参考。

In order to extract the gas from the coal seam efficiently and at low cost,the influence range of the borehole extraction was studied by theoretical calculation and field test.The results show that the influence range of bedding drilling expands with the extension of extraction time at the early stage.Based on the change of gas pressure in the borehole,the effective extraction radius of the drilling hole under different extraction time is analyzed,and the effective radius of pre-drainage 60d is determined to be 2.5m,which provides a reference for the gas control in Zhulinshan Coal Mine.