极松软易破碎综放面巷道“降钻锚注平”支护技术  

Compound support technology of roadway in soft and broken coal seam in fully mechanized top coal caving face

作　　者：朱乐章 黄北海 丁可 ZHU Yuezhang;HUANG Beihai;DING Ke(Huaibei Mining Industry Group Company,Huaibei 235000,China;State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]淮北矿业股份有限公司,安徽淮北235000 [2]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221116

出　　处：《煤炭工程》2023年第3期47-51,共5页Coal Engineering

摘　　要：针对淮北矿区8#煤层极松软易破碎综放面巷道支护技术难题,阐释了极松软易破碎综放面巷道支护失稳因素,基于支护-围岩协同作用机制,提出了以“巷道破底降帮+锚杆超前支护+锚索支护+超前注水注浆+平顶U型钢棚”支护为主的“降钻锚注平”支护技术。在此基础上,结合淮北矿区信湖煤矿815机巷地质条件,研究设计了极松软易破碎综放面巷道“降钻锚注平”支护技术,现场试验结果表明:信湖煤矿815机巷从掘进开始到巷道趋于稳定,顶底板相对移近量值最大值为117 mm,两帮相对移近量值最大值为66 mm,巷道支护效果良好,能够有效地控制极松软易破碎综放面巷道围岩的大变形,大幅提升了掘进速度。In view of the technical problems of roadway support in the extremely soft and broken fully mechanized top coal caving face in 8#coal seam of Huaibei mining area,the instability factors of roadway support are explained.Based on the basic principle of synergetics,the cooperative mechanism of support and surrounding rock is revealed,and the support technology of“drilling,anchoring and leveling”is put forward,which is mainly composed of roadway floor breaking and slope lowering+bolt advance support+anchor cable support+advance water injection and grouting+flat roof U-shaped steel shed support.On this basis,combining with the geological conditions of 815 transportation roadway in Xinhu Coal Mine,the support technology design of“drilling,anchoring and leveling”is carried out.The field test results show that from the beginning of tunneling to the stabilization,the maximum relative displacement values of the roof and floor are 117 mm,and the maximum relative displacement values of the two sides are 66 mm.The roadway support effect is good,which can effectively control the large deformation of the roadway surrounding rock in the extremely soft and fragile fully mechanized top coal caving face,and the tunneling speed has been greatly improved.

关 键 词：极松软易破碎 综放面巷道 支护技术 围岩稳定性 

分 类 号：TD353[矿业工程—矿井建设]