定向分支长钻孔区域瓦斯治理技术研究  

Study on gas control technology in directional branch long borehole area

作　　者：李伟 朱传杰[2] 刘娜 LI Wei;ZHU Chuan-jie;LIU Na(Shunhe Coal Mine,Yongcheng Coal Industry Group Co.,Ltd.,Yongcheng 476644,China;Faculty of Safety Engineering,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]永煤集团股份有限公司顺和煤矿,河南永城476644 [2]中国矿业大学安全工程学院,江苏徐州221116

出　　处：《煤炭科技》2021年第4期93-96,共4页Coal Science & Technology Magazine

基　　金：国家自然科学基金资助项目(51874293)。

摘　　要：针对单一低渗突出煤层瓦斯治理工作量大、成本高等问题,层底板中实施定向穿层长钻孔,达到高效抽采,提出定向分支长钻孔区域瓦斯治理技术。运用千米定向钻机在煤层中抽采瓦斯,通过深孔密闭取样装置和技术,验证区域钻孔钻屑量S主要在3.2~4.2 kg/m,钻孔瓦斯涌出初速度q<2.8 L/min,达到了防突目的。Aiming at the problem of high workload and high cost of gas control in a single low-permeability outburst coal seam,directional long boreholes were implemented in the floor to achieve efficient drainage,and gas control technology for directional branch long boreholes was proposed.Using kilometer directional drilling machine to extract gas in coal seam,through deep hole closed sampling device and technology,it was verified that the drilling cuttings volume of the boreholes in the area was mainly 3.2~4.2 kg/m,and the initial velocity of gas emission from the boreholes was less than 2.8 L/min,which has achieved the purpose of preventing outbursts.

关 键 词：定向长钻孔 分支钻孔 单一煤层 瓦斯治理 

分 类 号：TD713[矿业工程—矿井通风与安全]