基于顶板周期来压规律的高位抽采钻孔参数确定研究  

Determination of High Level Borehole Drilling Parameters Based on the Law of Roof Large Cycle and Small Cycle Pressure

作　　者：王震 李晓疆 娄芳 贾永勇 WANG Zhen;LI Xiao-jiang;LOU Fang;JIA Yong-yong(Xinjiang Coal Science Research Institute, Urumchi 830091, China;Xinjiang Coal and Coal-bed Methane Engineering Technology Research Center, Urumchi 830091, China)

机构地区：[1]新疆煤炭科学研究所,新疆乌鲁木齐830091 [2]新疆煤与煤层气工程技术研究中心,新疆乌鲁木齐830091

出　　处：《煤炭工程》2019年第4期34-37,共4页Coal Engineering

基　　金：新疆自治区自然科学基金资助项目(2017D01B40);新疆自治区科研院所基本科研业务经费(ky2018110)

摘　　要：通过相似模拟实验、现场实测及理论计算等手段,对塔河煤矿11B801综放工作面高位瓦斯抽采钻孔参数展开研究。结果表明:11B801综放工作面回采过程中存在"大、小周期"来压现象,小周期平均来压步距约15. 5m,大周期平均来压步距约65. 0m,"大、小周期"与瓦斯运移通道及聚集场所的发育密切相关;基于"大、小周期"来压步距确定了高位钻孔有效抽采长度,并反推计算出钻孔孔深、仰角、压茬距等参数;通过对工作面回采过程中顶板来压及钻孔抽采浓度监测数据分析,验证了利用"大、小周期"来压步距反推计算钻孔参数的合理性,11B801综放工作面上隅角瓦斯浓度控制在0. 47%以下,保证了11B801综放工作面安全高效生产。By means of similar simulation experiment,field measurement and theoretical calculation,the parameters of high level gas drainage borehole in 11B801 fully mechanized top coal caving face of Tahe Coal Mine are studied. The results show that there is a"large and small period"pressure phenomenon in the recovery process of 11B801 fully mechanized caving face.The small cycle average pressure step distance is about 15. 5 m,and the large period average pressure step distance is about 65. 0 m. The"large and small period"is closely related to the development of gas migration channel and the development of the gathering place. Based on the "big and small cycle ", the effective length of the high borehole is determined, and the parameters such as depth,elevation and stubble distance are calculated. Through the analysis of the monitoring data of roof pressure and drilling extraction concentration during the working face recovery,the reasonableness of calculating the drilling parameters with the back-stepping of the step distance of the "large and small period"was verified. The gas control of the upper corner of the 11B801 fully mechanized caving face was below 0. 47%,which ensured the safe and efficient production of the 11B801 fully mechanized caving face.

关 键 词：综放工作面 周期来压 高位钻孔 瓦斯超限 

分 类 号：TD712.6[矿业工程—矿井通风与安全]