大断面托顶煤巷道不稳定区域支护研究  

Unstable Regional Support of Large Section Top Coal Roadway

作　　者：田柯 武超 TIAN Ke;WU Chao(Security Science and Engineering Center for Post-doctoral Studies,China University of Mining and Technology（Beijing）,Beijing 100083,China;College of Resources and Safety Engineering,China University of Mining and Technology（Beijing）,Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)安全科学与工程博士后科研流动站,北京100083 [2]中国矿业大学(北京)资源与安全学院,北京100083

出　　处：《煤矿安全》2018年第11期136-140,共5页Safety in Coal Mines

摘　　要：为研究大断面托顶煤巷道围岩破坏严重的问题,结合运输平巷顶板条件,通过采用顶板钻孔窥视的方法,研究了顶板围岩内部结构状况,确定顶板不稳定区域,提出不稳定区域注浆改性与强力锚(杆)索联合加固的围岩控制技术,并应用于现场。结果表明:运输平巷1 800～1 950 m为顶板不稳定区,采用水泥与化学耦合注浆改性与高预应力锚索补强支护的综合加固技术可以控制顶板不稳定区域,顶板最大下沉量88 mm,锚杆锚索有比较大的富余量;矿压观测结果表明本支护设计科学合理,支护有效控制了运输平巷围岩变形,保证了大断面托顶煤巷道的安全。In order to study the serious surrounding rock failure of large section top coal roadway, combined with the roof condition of rubber roadway, the internal structure of the surrounding rock of the roof was studied by using the method of roof drilling and peeping, and the unstable area of the roof was determined, and the unstable area was proposed. Surrounding rock control technology combined with grouting modification and strong anchor（rod） cable is proposed and applied to the site. The research results show that the transportation roadway is 1 800 m to 1 950 m, which is the unstable area of the roof. The comprehensive reinforcement technology of cement and chemical coupling grouting modification and high prestressed anchor cable reinforcement can control the unstable area of the roof and the maximum roof. The sedimentation capacity is 88 mm, and the bolt anchor cable has a relatively large margin. The mine pressure observation results show that the design of the support is scientific and reasonable. The support effectively controls the deformation of the surrounding rock of the haulageway, and ensures the safety of the large section top coal roadway.

关 键 词：大断面托顶煤 注浆改性 锚索 不稳定区域 综放开采 

分 类 号：TD353[矿业工程—矿井建设]