泉店煤矿高应力条件下软岩巷道二次支护技术研究

发布时间：2018-03-19 17:26

本文选题：高地应力　切入点：软岩巷道　出处：《辽宁工程技术大学》2015年硕士论文　论文类型：学位论文

【摘要】：近年来煤矿软岩巷道围岩控制问题已逐渐成为影响煤矿高产高效的重大技术难题之一。在矿井开采深度逐渐加大的背景下,软岩矿井和软岩巷道所占比例已明显呈逐年上升的趋势。现有的统计资料可以表明,在高应力条件下的软岩巷道变性破坏的主要原因是巷道的支护结构性失稳。因此,如何提高支护承载结构的整体稳定性及其承载能力,是解决高应力条件下软岩巷道支护难题的关键。论文以河南省神火集团泉店煤矿为依托,结合该矿-540m东翼轨道大巷和皮带大巷处于软岩之中,断层构造带多,地应力高等显著工程实际特点,解决了如何在断层构造带受到采动影响的高应力条件下的软岩巷道实现高强稳定型支护,合理有效控制巷道围岩变形破坏的主要技术难题。论文通过地应力和煤岩体物理力学实验,对泉店煤矿-540m东翼巷道的地应力状况和围岩稳定性进行了评价,通过理论分析、经验类比以及数值模拟得出了泉店煤矿软岩巷道变形破坏的突破口和整个支护体系的薄弱环节,并在此基础上提出了小孔径预应力锚索结构补偿的二次支护方案。通过现场试验和经济效益分析,验证了支护方案的优越性,成功解决了泉店煤矿高应力条件下破碎软岩巷道的支护难题,达到了预期的效果,同时亦可为同类型的软岩巷道支护提供参考价值。
[Abstract]:In recent years, the control of surrounding rock in soft rock roadway has gradually become one of the major technical problems affecting the high yield and high efficiency of coal mine. The proportion of soft rock mine and soft rock roadway has obviously been increasing year by year. The available statistical data can show that the main reason of soft rock roadway denaturation failure under high stress condition is the structural instability of roadway support. How to improve the overall stability and bearing capacity of supporting bearing structure is the key to solve the problem of soft rock roadway support under high stress conditions. Combined with the practical characteristics of the mine, which is located in soft rock with a large number of fault structural zones and high and significant geostress engineering, the track roadway and belt roadway of the eastern wing of the mine -540 m are in the middle of soft rock. How to realize high strength and stable support in soft rock roadway under the condition of high stress affected by mining in fault structural zone is solved. This paper evaluates the ground stress condition and the stability of surrounding rock in Quandian Coal Mine by means of in-situ stress and physical and mechanical experiments of coal and rock mass. The empirical analogy and numerical simulation show the breakthrough of soft rock roadway deformation and destruction in Quandian Coal Mine and the weak link of the whole support system. On this basis, the secondary support scheme of small aperture prestressed anchor cable structure compensation is put forward, and the superiority of the support scheme is verified by field test and economic benefit analysis. The support problem of broken soft rock roadway under the condition of high stress in Quandian coal mine has been solved successfully, and the expected effect has been achieved. At the same time, it can also provide reference value for the same type of soft rock roadway support.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD353

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