走向高抽巷抽采瓦斯关键技术  

Key Technology of Gas Extraction Through Strike High-bleeding Roadway

作　　者：张慧杰 汪东 孙星 郭建行 高旭 

机构地区：[1]煤炭科学技术研究院有限公司安全分院,北京100013 [2]煤炭资源高效开采与洁净利用国家重点实验室,北京100013 [3]阳泉煤业(集团)有限责任公司五矿,山西阳泉045200

出　　处：《煤矿安全》2016年第1期74-77,共4页Safety in Coal Mines

基　　金：国家科技重大专项资助项目(2011ZX05063-009);国家重点基础研究发展规划(973计划)资助项目(2011CB201206);科研院所技术开发专项资助项目(2014EG122192);国家自然科学基金应急管理资助项目(51444006)

摘　　要：针对低透气性高瓦斯煤层群条件下邻近层瓦斯治理难题,基于岩层控制关键层理论,探讨了走向高抽巷抽采瓦斯作用原理,理论研究了走向高抽巷抽采瓦斯的关键技术。研究结果表明:以破断距为判别指标计算各关键层的破断顺序,可据此确定走向高抽巷的合理层位;走向高抽巷与回风巷沿煤层倾向的投影距离由沿倾向的煤层卸压角和采空区上方"O"形圈的宽度确定;初采期可采用伪倾斜后高抽巷抽采邻近层瓦斯。现场跟踪阳煤五矿典型工作面初采期瓦斯风排量、抽采量和涌出量数据,验证了走向高抽巷抽采关键技术应用的可行性,初采期间瓦斯得到合理控制,稳定后抽采率达95%。Aiming at the gas problem of adjacent seams in low permeability and high gas coal seam group, based on key stratum theory of strata control, the gas extraction action principle of strike high - bleeding roadway was discussed, and then key technology of gas ex- traction through strike high - bleeding roadway was studied theoretically. The results showed that rational layer of strike high - bleeding roadway could be determined by analyzing fracturing order of key strata according to interval of roofing breaking, the projective distance along tendency between strike high - bleeding roadway and return airway depended on pressure - relief angle and the width of ＂ 0 - shape＂ circle, and false - inclined high - bleeding roadway could be used in gas extraction of adjacent seams. A case was studied in No. 5 mine by recording data of gas emission of ventilation, gas extraction and gas emission of total quantity during beginning mining, the result showed that gas was controlled well during beginning mining by applying key technology of gas extraction through strike high - bleeding roadway, stable extraction rate reached 95 %.

关 键 词：走向高抽巷 关键层理论 瓦斯抽采 关键技术 邻近层 

分 类 号：TD712[矿业工程—矿井通风与安全]