高位定向长钻孔瓦斯抽采技术在高山煤矿瓦斯治理中的应用

为有效解决高山煤矿瓦斯超限问题,以50230工作面为研究对象,基于理论分析和计算确定高位钻孔的设计方案,并经过现场实测对比长距离定向高位钻孔和定向顺层钻孔2种技术的瓦斯抽采效果和工程效益。结果表明,定向高位钻孔的单位抽采量相对于顺层钻孔更为显著,实现1.3~2.1倍的提高,体现较好的社会和经济效益,保证矿井的安全高效生产。

In order to effectively solve the problem of gas over-limit in alpine coal mine,taking 50230 working face as the research object,the design scheme of high-angle drilling is determined based on theoretical analysis and calculation.Through field measurement,the gas drainage effects and engineering benefits of long-distance directional high-angle drilling and directional bedding drilling are compared.The results show that the unit extraction capacity of directional high-angle drilling is more significant than that of bedding drilling,which increases by 1.3~2.1 times,reflects better social and economic benefits,and ensures the safe and efficient production of the mine.