穿层钻孔与顺层钻孔抽采半径差异性研究  

Study on difference of drainage radius comparsion crossing hole with bedding hole

作　　者：杨宏民[1,2] 刘冠鹏[1] 刘军[1,2] 

机构地区：[1]河南理工大学安全科学与工程学院,河南焦作454000 [2]河南省瓦斯地质与瓦斯治理重点实验室(省部共建国家重点实验室培育基地),河南焦作454000

出　　处：《河南理工大学学报（自然科学版）》2016年第2期149-155,共7页Journal of Henan Polytechnic University（Natural Science）

基　　金：国家自然科学基金资助项目(51174081);河南省科技攻关项目(132300410119)

摘　　要：为了研究两种钻孔有效抽采半径之间存在的差异,以朱集西煤矿11-2煤层为例,采用压力降低法测定了穿层钻孔的有效抽采半径,采用SF6气体示踪现场实测结合COMSOL软件模拟的方法测试了同一煤层顺层钻孔的有效抽采半径。现场测试结果表明,试验煤层在13 k Pa抽采负压、抽采90 d的条件下,穿层钻孔和顺层钻孔的有效抽采半径分别为4.5 m和7.8 m,穿层钻孔的有效抽采半径明显小于顺层钻孔的有效抽采半径,这对抽采设计中合理选择钻孔间距具有十分重要的意义。In order to study difference of two effective drainage radius,taking the No. 11-2 coal seam of Zhujizi coal mine as object,the effective drainage radius of cross-measure borehole was measured by use pressure reducing method,and the effective drainage radius of in-seam borehole was determined in the same coal seam by combine SF6 gas trace method with numerical simulation in COMSOL software. The results show that the effective drainage radius of cross-measure borehole and in-seam borehole are 4. 5 m and 7. 8 m respectively under the condition of 13 k Pa drainage negative pressure and 90 d drainage period,and the effective drainage radius of cross-measure hole is less than the one of hole drilled along seam significantly. The result is enormously significant to choose drainage right borehole spacing in drainage design.

关 键 词：穿层钻孔 顺层钻孔 有效抽采半径 SF6示踪法 瓦斯抽采 

分 类 号：TD713.3[矿业工程—矿井通风与安全]