软岩大变形巷道底臌破坏机制与支护技术研究

doi:10.13722/j.cnki.jrme.2014.0185

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摘要随着资源开采由浅部向深部转移，如何有效地控制底臌成为深部软岩巷道支护中首要考虑的问题。针对国投新集刘庄煤矿围岩破坏严重、难支护的情况，结合刘庄煤矿制冷硐室所处的地质环境特点，在巷道围岩的物理力学特性、岩石矿物成分分析、现场地应力测量、现场大型真三轴流变试验的基础上，分析巷道底臌的主控因素，研究表明：本巷道底臌变形主要是由于软弱围岩在较高的水平构造应力作用下，产生明显的流变变形所致。在此基础上，对该巷道进行支护设计优化，提出一种由U型钢可压缩支架和泡沫混凝土填充结合预应力锚索的被动卸压与主动施压相结合的底臌变形控制方案，并通过数值方法验证该方案的合理性。

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关键词 ：采矿工程, 煤矿, 软岩, 巷道, 底臌, 大变形, 支护技术

Abstract：As underground resources exploitation goes deeper and deeper，how to effectively control the floor heave becomes a key problem in roadway support. Considering the surrounding rock damage serious and difficult to support of Liuzhuang coal mine in Xinji，combined with the geological environment characteristics of refrigeration cavern of Liuzhuang coal mine，a large number of in-situ and laboratory tests were done including geostress measurement，true triaxial rheological test，physico-mechanical properties of roadway surrounding rock and rock mineral composition analysis. The research results show that floor heave of this roadway is mainly caused by the flowing deformation of the weak wall rock under the influence of high horizontal tectonic stress. Optimized support design is carried out for this roadway based on analysis above，proposing the floor heave control strategy of compressible steel arch and foam concrete combined with pre-stressed anchor cable. The rationality of the scheme is verified by means of numerical simulation.

Key words： mining engineering coal mine soft rock roadway floor heave large deformation supporting technique

引用本文:

郑朋强1，陈卫忠1，2，谭贤君1，戴永浩1. 软岩大变形巷道底臌破坏机制与支护技术研究[J]. 岩石力学与工程学报, 2015, 34(s1): 3143-3150.
ZHENG Pengqiang1，CHEN Weizhong1，2，TAN Xianjun1，DAI Yonghao1. STUDY OF FAILURE MECHANISM OF FLOOR HEAVE AND SUPPORTING TECHNOLOGY IN SOFT ROCK OF LARGE DEFORMATION ROADWAY. , 2015, 34(s1): 3143-3150.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2014.0185 或 http://www.rockmech.org/CN/Y2015/V34/Is1/3143

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