李家楼煤业2号煤层预抽钻孔抽采半径研究

Research on the extraction radius of pre extraction boreholes in No.2 coal seam of Lijialou coal industry

本文以李家楼煤业2号煤层预抽钻孔抽采半径作为研究对象,利用瓦斯压力下降法,在1204胶带顺槽布置钻孔进行现场测试,经过3个多月的抽采观测,通过分析得出2号煤层预抽的有效抽采半径,对指导矿井瓦斯治理工作,进而达到保障矿井安全生产的目的,具有积极的理论价值和实践意义。

In this paper,it takes Lijialou coal industry No.2 coal seam pre drainage drilling radius as the research object,using the gas pressure drop method,in 1204 belt trough layout drilling field test,after more than three months of drainage observation,through the analysis of No.2 coal seam pre drainage effective drainage radius,has a positive theory value of guiding the gas control work,and then achieve the purpose of ensuring the safety of mine production.