深井断层破碎带穿层软岩巷道锚网索耦合控制对策

发布时间：2017-12-27 02:27

本文关键词：深井断层破碎带穿层软岩巷道锚网索耦合控制对策　出处：《采矿与安全工程学报》2016年02期 　论文类型：期刊论文

【摘要】：旗山矿开采深度近千米,随着开采深度的增加,在高地应力、特别是在水平构造应力和断层切割条件的影响下,巷道围岩出现顶沉、帮缩和底鼓等大变形破坏现象,其中顶沉及帮缩量最大处超过1 100 mm,原有支护很难控制巷道围岩稳定性,严重影响和制约了煤矿的安全生产。基于此,以旗山矿千米深井断层破碎带穿层软岩巷道为例,详细分析了巷道破坏特征及主控因素,得出了高应力膨胀型软岩巷道的破坏力学机制,提出了注浆+非对称锚网索+底角锚杆耦合支护控制对策,实现支护体与围岩在强度、刚度和结构上的耦合,从而达到控制深部软岩巷道稳定的目的。上述成果在现场进行了应用,监测结果表明耦合支护对深部高应力断层破碎带穿层巷道的稳定性起到很好的控制效果。
[Abstract]:Mining depth of Qishan nearly kilometers, with the increase of mining depth, stress, especially under the influence of horizontal tectonic stress and fault cutting conditions in the Highlands, roadway tops, heavy damage phenomenon help shrink and bottom drum deformation, the top heavy and help value more than 1100 mm, the original branch support is difficult to control the stability of the surrounding rock, seriously affecting and restricting the safe production of the coal mine. Based on this, in Qishan mine kilometer deep fault zone in soft rock tunnel as an example, a detailed analysis of the failure characteristics and main controlling factors, the failure mechanism of high stress and swelling soft rock tunnel, grouting + asymmetric cable anchor + floor anchor coupling support control countermeasure was put forward. The coupling strength and stiffness and the structure of the support structure and the surrounding rock, so as to achieve the control of deep soft rock roadway stability purposes. The above results are applied in the field. The monitoring results show that the coupling support has a good control effect on the stability of the deep stress fracture zone.
【作者单位】：中国矿业大学(北京)深部岩土力学与地下工程国家重点实验室力学与建筑工程学院;
【基金】：国家自然科学基金项目(51374214);国家自然科学基金青年科学基金项目(51404278)
【分类号】：TD353
【正文快照】： 进入深部开采以后,巷道围岩受高自重应力和残余构造应力影响,处于高应力状态,甚至已经达到围岩强度,在如此高应力状态下进行工程开挖,面临严峻挑战[1-3]。浅部工程中非软弱岩石进入深部后在高地应力作用下,表现出明显的软岩特性,易发生显著非线性大变形破坏现象[4-6]。特别是

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