深部复合顶板煤巷预应力桁架锚索梁支护技术  

The prestressed-truss-cable-beam support technique of component roof in deep coal roadways

作　　者：张永青[1] 王卫军[1] 蒋熠[1] 屈延嗣[1] 罗立强[1] 王宏宇[1] 

机构地区：[1]湖南科技大学煤矿安全开采技术湖南省重点实验室,湖南湘潭411201

出　　处：《矿业工程研究》2011年第4期10-14,共5页Mineral Engineering Research

基　　金：国家自然科学基金资助项目(51074071);国家自然科学基金资助项目(51104063);湖南科技大学研究生创新基金资助项目(S110104)

摘　　要：曲江煤矿工作面埋深已达-900m以下,煤巷变形严重,采用锚网梁支护方式已不能满足生产的正常进行.介绍了巷道大变形的特征,通过观测试验方法对巷道围岩变形破坏机制进行了分析,采用数值模拟方法分析了巷道的变形破坏过程,表明掘巷初期锚杆支护质量差达不到要求和煤柱留设宽度的不合理,是导致巷道掘进初期发生大变形的主要原因,然后提出要加强锚杆安装质量,并根据数值模拟结果确定了合理的煤柱宽度,有针对性的提出了锚网梁+预应力桁架锚索梁的联合支护方式,并进行了工业性试验,试验观测结果表明巷道变形得到了较好的控制,能够满足正常生产的需求.The mining depth in Qu Jiang colliery has reached 900 meters level below, where the supporting pattern of bolt mesh and beam can＇ t meet the demands of normal production. The characteristics of the great deformation in tunnels are presented, observation experiment and numerical simulation are adapted to analyze the deformation failure mechanism and the failure process of roadways respectively. The great deformation at the initial stage of tunneling is attributed to the unqualified bolt supporting and the unreasonable pillar width. The quality of bolt supporting should be ensured, and the reasonable width of the coal pillar is proposed via numerical simulation, the joint support pattern, which is composed of bolt mesh and beam with prestressed - truss - cable - beam is put forward, and the industrial experiment is implemented, the experiment shows that the deformation of tunnels is controlled properly, which can meet the production requirements.

关 键 词：煤柱 预应力桁架锚索梁 数值模拟 复合顶板 

分 类 号：TD353.6[矿业工程—矿井建设]