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首页> 外文会议>International Symposium on Mine Safety Science and Engineering >Study on safety technology of anti-caving at a super-large section roadway with thick and fractural coal roof
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Study on safety technology of anti-caving at a super-large section roadway with thick and fractural coal roof

机译：厚浅煤屋顶超大型巷道防洞安全技术研究

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摘要

Numerical simulation is applied to analyze surrounding stress distribution of individual cells and the reasons are proposed why roof caving easily happens at apex angle and at the center of roadway. Furthermore, based on key factors of roof caving and mechanics derivation of neutral axis's new position in roof beam, the superiority of prestressed truss cable and its key component-connector is thoroughly analyzed in safety management of anti-caving. Finally, according to the geometric size and abutment pressure influence of coal roadway No. 9101 in Danshuigou coal mine, prestressed truss cable combined control scheme and its corresponding parameters are designed by use of numerical simulation method and engineering analogue method, then the scheme have been put into practice on spot. The field observation results show that roof should be effectively controlled by the cable truss structure consisting of two long cables and one connector, which could prevent roof accidents fundamentally at a super-large section roadway with thick and fractural coal roof.
机译：应用数值模拟来分析各个电池的周围应力分布，提出了原因，为什么屋顶洞容易发生在顶部角度和道路中心。此外，基于屋顶梁中立轴新位置的屋顶塌陷和力学推导的关键因素，在防塌的安全管理中彻底分析了预应力桁架电缆及其关键部件连接器的优越性。最后，根据跨越煤矿煤道路9101的几何尺寸和邻接压力影响，预应力桁架电缆组合控制方案及其相应的参数采用数值模拟方法和工程模拟方法设计，然后该方案已成为在现场实践。现场观察结果表明，屋顶应通过由两个长电缆和一个连接器组成的电缆桁架结构有效控制，可以防止屋顶事故在基本上在具有厚和煤屋顶的超大段巷道上。

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