水力冲孔增透促抽技术在突出煤层石门揭煤中的应用  

Application of hydraulic flushing in hole technology in cross-cut coal uncovering of antireflection and extraction promotion in outburst coal seam

作　　者：谭家贵 李克相 张茂元 郭建忠 盛柱稳 孙京 陈勇 TAN Jiagui;LI Kexiang;ZHANG Maoyuan;GUO Jianzhong;SHENG Zhuwen;SUN Jing;CHEN Yong(Bailongshan Coal Mine of Mining Branch of Huaneng Yunnan Diandong Energy Co.,Ltd.,Qujing 655508,China;State Key Laboratory of the Gas Disaster Detecting,Preventing and Emergency Controlling,Chongqing 400037,China;CCTEG Chongqing Research Institute,Chongqing 400037,China)

机构地区：[1]华能云南滇东能源有限责任公司矿业分公司白龙山煤矿,云南曲靖655508 [2]瓦斯灾害监控与应急技术国家重点实验室,重庆400037 [3]中煤科工集团重庆研究院有限公司,重庆400037

出　　处：《矿业安全与环保》2022年第3期51-55,61,共6页Mining Safety & Environmental Protection

基　　金：重庆市安全生产(煤炭发展)专项资金项目(2020B182[5985]20015506,2020B182[5985]20015511);重庆市自然科学基金面上项目(cstc2020jcyj-msxmX1013)。

摘　　要：白龙山煤矿一井C_(2)煤层为突出煤层,为提高矿井瓦斯抽采效果,保障石门揭煤安全、缩短揭煤周期,对水力冲孔增透促抽技术开展了试验研究。研究结果表明:石门揭煤区域采取水力冲孔措施后,渗透性较低且较为松软的C_(2)煤层出煤量较大,单孔出煤量1.27~2.73 t,平均出煤量2.28 t;试验区域经210 d连续抽采,煤层瓦斯含量由11.4659 m^(3)/t降低至3.5511~4.2517 m^(3)/t,下降约63%,瓦斯压力由0.81 MPa降低至0.34 MPa,下降约58%;揭煤期间工作面钻屑瓦斯解吸指标K_(1)值最大值为0.32 mL/(g·min^(1/2)),钻屑量最大值为2 kg/m,炮后瓦斯浓度为0.04%~0.24%,瓦斯涌出量为2.22 m^(3)/min。水力冲孔措施可为矿井石门安全快速揭煤提供技术保障,对安全生产具有重要指导作用。The C_(2)coal seam in the No.1 well of Bailongshan Coal Mine is an outburst coal seam.In order to improve the effect of mine gas drainage,ensure the safety of cross-cut coal uncovering and shorten the period of coal uncovering,an experimental study on antireflection and extraction promotion technology of hygraulic flushing in hole was carried out.The research results show that after adopting the measure of hygraulic flushing in hole for cross-cut coal uncovering,the coal output of C_(2)coal seam with low permeability and relatively soft coal is larger,the coal output from single hole is between 1.27 t and 2.73 t,the average coal output is 2.28 t;after 210 d of continuous drainage in the test area,the coal seam gas content decreases from 11.4659 m^(3)/t to the rang of 3.5511 m^(3)/t to 4.2517 m^(3)/t,with a decrease of about 63%,and the gas pressure decreases from 0.81 MPa to 0.34 MPa,with a decrease of about 58%;during coal uncovering,the maximum value of gas desorption index of drilling cuttings is 0.32 mL/(g·min^(1/2)),the maximum value of drilling cuttings is 2 kg/m,the gas concentration after blasting is from 0.04%to 0.24%and the gas emission is 2.22 m^(3)/min.The measures of hydraulic flushing in hole can provide technical support for the safe and rapid coal uncovering at cross-cut in mine.It plays an important guiding role in production safety.

关 键 词：突出煤层 石门揭煤 水力冲孔 煤层增透 瓦斯吸附 瓦斯解吸 

分 类 号：TD712[矿业工程—矿井通风与安全]