高产高效工作面顶板走向钻孔瓦斯抽采技术  

Gas Drainage Technology of Along-Strike Roof Drills in Working Face with High Production and Efficiency

作　　者：王海锋[1] 程远平[1] 沈永铜[2] 刘海波[1] 

机构地区：[1]中国矿业大学安全工程学院,江苏徐州221116 [2]淮北矿业集团祁南煤矿,安徽宿州234115

出　　处：《采矿与安全工程学报》2008年第2期168-171,共4页Journal of Mining & Safety Engineering

基　　金：国家重点基础研究发展计划(973)项目(2005CB221503);国家自然科学基金重点项目(70533050);国家自然科学基金项目(50674089);国家“十五”科技攻关项目(2005BA813B-3-06)

摘　　要：以祁南煤矿349工作面为工程背景，结合采场围岩控制理论，分析了高产高效工作面采空区上覆岩层移动及裂隙发育特征；得出工作面推进速度与顶板走向抽采钻孔在垂向上的布置高度成反比关系．349工作面项板走向钻孔参数优化和抽放效果实践表明，当工作面推进速度为5～6m／d时，顶板走向钻孔应布置在冒落带范围的岩层中，即钻孔终孔与煤层顶板垂距为10～15m，前后钻场钻孔压茬为50m，可以确保顶板走向钻孔较高的利用率，并得到很好的抽采效果，满足采煤工作面的安全生产要求．Taking 349 working faces in Qinan coal mine as examples, using the theory of strata control around longwall face, we analyse the characteristic of strata movement and failure development above goaf in working face with high production and efficiency. The result shows that the advancing velocity is inversely proportional to the vertical distance, from bottom of coal seam, of the along-strike roof drills. Through parameter optimization of the along-strike roof drills and engineering practice, we can see that the along-strike roof drills should be situated in strata of caving zone and the vertical distance between bottom of roof drills and coal seam should be 10-15 m, and the overlapping length of back-and-forth drills should be 50 m. By doing so, a high efficiency of the along-strike roof drills and a good effect of gas drainage can be achieved, and the safety production of working faces ensured.

关 键 词：高产高效工作面 裂隙发育 顶板走向钻孔 瓦斯抽采 

分 类 号：TD712[矿业工程—矿井通风与安全]