综放采空区千米钻孔与高位钻孔抽采方法对比分析及优化  

Differences between gas drainage from goaf by thousand-meter scale borehotes and high-level boreholes and their improvement

作　　者：陈亮[1] 许小凯[2] 尚荣亚 段本杰[1] 王吉生 葛路军 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京市海淀区100083 [2]中国矿业大学(北京)地球科学与测绘工程学院,北京市海淀区100083 [3]潞安集团余吾煤业有限责任公司,山西市长治市046103

出　　处：《中国煤炭》2015年第2期92-95,113,共5页China Coal

基　　金：国家自然科学基金项目(51274205)

摘　　要：以余吾煤业N1102综放面为例,通过考察高位钻场与千米钻场两种抽采方法下瓦斯纯流量、瓦斯浓度、抽采总纯量与工作面累积日进尺的关系,得出千米钻场抽采纯量仅为高位钻场的一半,分析其原因,并提出了改进打钻设备及封孔工艺、采用注水法结合UDEC数值模拟法准确确定裂隙带高度、在单个千米钻孔内开出多条分支、提高抽采负压等优化方法。At Nl102 working face in Yuwu Coal Mining Company, the different parametersfor gas drainage by high-level boreholes and 1000 m long boreholes, including the gas flow rate,the gas concentration, the relationship between total gas flow and advancing speed of workingface, were contrasted. The results showed that the total gas flow for thousand-meter scale bore-hotes is a half of that for high-level boreholes. The causes were analyzed and the relevant im-provements were proposed, covering the improvement of drilling equipments and sealing tech-niques, the accurate determination of height of fissure zone by water injection and UDEC numeri-cal simulation, branch-drilling along each thousand-meter scale borehotes, and the enhancementof negative drainage pressure.

关 键 词：采空区 瓦斯抽采 高位钻场 千米钻场 裂隙带 抽采效果 

分 类 号：TD712.1[矿业工程—矿井通风与安全]