浅埋三软厚泥岩顶板煤巷破坏特征与控制技术  

Analysis of Failure Characteristics and Control Technology of Shallow Buried and Three-soft Coal Roadway with Thick Mudstone Roof

作　　者：罗怀廷 LUO Huaiting(School of Mines,China University of Mining and Technology,Xuzhou 221116,China;State Key Laboratory of Coal Resources and Safe Mining,Xuzhou 221116,China;China Shenhua Haerwusu Open-pit Coal Mine,Ordos 017100,China)

机构地区：[1]中国矿业大学矿业工程学院,江苏徐州221116 [2]煤炭资源与安全开采国家重点实验室,江苏徐州221116 [3]中国神华哈尔乌素露天煤矿,内蒙古鄂尔多斯017100

出　　处：《煤矿安全》2018年第10期95-98,共4页Safety in Coal Mines

摘　　要：为解决三软厚泥岩顶板煤巷围岩变形大、持续变形剧烈、支护构件失效破坏严重等工程难题,分析了巷道围岩变形破坏特征及变形力学机制。基于"强网护表,多级控顶,适度让压,喷层阻水"的设计理念,提出了"多级控顶让压"耦合控制技术,并采用数值模拟软件分析了其位移场变化情况,验证了其支护效果。工程实践表明,采用该控制技术后,巷道顶板下沉量为21 mm,底鼓量为22 mm,两帮移近量为59 mm,分别为原支护的10%、6.9%、13.3%,有效解决了该巷道围岩变形较大的工程难题。In order to solve the engineering problems such as large deformation of surrounding rock, severe continuous deformation and serious failure of supporting components in the coal roadway with three soft and thick mudstone roof, failure characteristics and mechanical deformation mechanism of surrounding rock were analyzed. Based on the design concept of ＂strong network surface protection, multi-stage roof control, moderate pressure release, water blocking by spraying＂, a coupling supporting scheme of ＂multi-stage roof control with pressure release＂is proposed, and the change of displacement field is analyzed by numerical simulation software and its supporting effect is also verified. Engineering practices show that the subsidence of roadway roof is 21 mm, the measure of floor heave is 22 mm, the displacement of both sides of roadway is 59 mm after adopting this control technology, 10%, 6.9% and 13.3% of the original support, respectively, which effectively solves the engineering problem of large deformation of the surrounding rock of the tunnel.

关 键 词：三软煤巷 变形破坏特征 数值模拟 耦合控制技术 

分 类 号：TD327[矿业工程—矿井建设]