强烈采动作用下岩巷围岩塑性区恶性扩展的控制研究

发布时间：2018-06-14 20:05

本文选题：深部巷道 + 塑性区　；参考：《采矿与安全工程学报》2016年06期

【摘要】：采用理论分析、数值计算和现场试验等手段,研究了支护阻力对巷道围岩应力场的影响,分析了支护阻力对围岩塑性区及其分布形态的作用,对比了塑性区均匀扩展与恶性扩展对巷道变形的影响。认为在常规支护条件下支护阻力对围岩应力场分布影响有限,难以遏制塑性区恶性扩展;塑性区恶性扩展所导致的巷道变形远大于均匀扩展相同面积的巷道变形,控制塑性区恶性扩展是维护巷道围岩稳定的有效途径。以江西高坑矿采动影响下暗皮带斜井的加固为工程背景,研究通过敏感部位局部加强来控制塑性区恶性扩展的方法,提出"整体加固+局部加强"的支护方案并实施。现场实践表明,暗皮带斜井在上覆煤层采动过程中围岩得到较好的控制,保证了该巷道的长期稳定。
[Abstract]:By means of theoretical analysis, numerical calculation and field test, the influence of support resistance on surrounding rock stress field of roadway is studied, and the effect of support resistance on plastic zone of surrounding rock and its distribution form is analyzed. The effects of plastic zone uniform expansion and malignant expansion on roadway deformation are compared. It is considered that the influence of support resistance on the distribution of surrounding rock stress field is limited under the condition of conventional support, and it is difficult to contain the malignant expansion of plastic zone, and the tunnel deformation caused by the malignant expansion of plastic zone is much larger than that of roadway with uniform expansion of the same area. Controlling the malignant expansion of plastic zone is an effective way to maintain the stability of roadway surrounding rock. Taking the reinforcement of inclined shaft with dark belt under the influence of mining movement in Gaokeng Mine of Jiangxi Province as the engineering background, this paper studies the method of controlling the malignant expansion of plastic zone through local strengthening of sensitive site, and puts forward the support scheme of "whole reinforcement and local strengthening" and puts it into practice. The field practice shows that the surrounding rock is well controlled in the mining process of overlying coal seam, which ensures the long-term stability of the roadway.
【作者单位】：湖南科技大学煤矿安全开采技术湖南省重点实验室;
【基金】：国家自然科学基金项目(51434006,51374105) 湖南科技大学研究生创新基金项目(CX2015B431)
【分类号】：TD353

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