“三软”煤层水力冲孔卸压增透技术研究  

Study on pressure releasing and permeability improving technology with hydraulic flushing in“three soft”coal seam

作　　者：何志龙 孙谦 宋大钊[2,3] 高勤琼 

机构地区：[1]河南能源化工集团贵州兴安煤业有限公司糯东煤矿,贵州兴义561904 [2]永城煤电集团有限责任公司技术与信息中心,河南永城450016 [3]中国矿业大学安全工程学院,江苏徐州221116

出　　处：《中国科技论文》2015年第15期1789-1792,1801,共5页China Sciencepaper

基　　金：国家自然科学基金资助项目(51304205);中国博士后科学基金资助项目(2013M541982;2014T70678)

摘　　要：针对糯东煤矿"三软"高瓦斯低透气性煤层易流变、难抽采的问题,提出了底板巷道穿层水力冲孔卸压增透技术,并在糯东煤矿11702掘进工作面进行了现场试验。结果表明:冲孔后比冲孔前抽采瓦斯浓度上升3.4倍,瓦斯抽采流量增加4.4倍,炮掘工作面回风流中的瓦斯(体积分数)由冲孔前0.8%的超限预警状态变成冲孔后的0.4%的安全范围,水力冲孔技术应用效果显著,在糯东煤矿取得了良好的卸压增透效果。To solve the problem of easy rheology and hard drainage in＆quot;three soft＆quot;coal seam with high gas concentration and low permeability in Nuodong coal mine,the pressure releasing and permeability improving technology with hydraulic flushing in floor gateway was proposed,and corresponding field test at the No.11702 heading face of Nuodong coal mine was carried out.The re-sults show that the drained gas concentration after hydraulic flushing is 3.4 times as that without hydraulic flushing and the gas flow rate is increased by 4.4 times;and the gas concentration at the blasting working face changes from 0.8% （overrun warning state,before hydraulic flushing）to 0.4% （safety state,after hydraulic flushing）.The application of hydraulic flushing technolo-gy is more effective and remarkable in releasing pressure and improving permeability in Nuodong coal mine.

关 键 词：“三软”煤层 水力冲孔 卸压增透 矿井瓦斯防治 

分 类 号：TD712.6[矿业工程—矿井通风与安全]