巷道围岩应力场结构的表征及破坏因素分析

发布时间：2018-03-29 01:37

本文选题：巷道围岩　切入点：应力场　出处：《煤炭科学技术》2017年09期

【摘要】：巷道围岩应力场结构对巷道的变形和破坏有重要的影响,为了表征巷道围岩应力场结构,提出使用主应力迹线来可视化显示应力场,并通过主应力迹线图中退化点的位置和类型,以及优势主应力迹线束的分布来表征应力场的结构。分别对不同侧压系数和岩层组合条件下的巷道进行数值模拟,根据模拟结果手工描绘出主应力迹线图,得出巷道围岩应力场结构变化的一般规律,以及由此造成的巷道围岩破坏规律的变化。结果表明:应力迹线图是表征巷道围岩应力场结构的有效方法,巷道围岩破坏和应力场结构之间存在较明确的关系。该研究为巷道围岩控制理论研究提供新的思路。
[Abstract]:The stress field structure of roadway surrounding rock has an important influence on the deformation and failure of roadway. In order to characterize the stress field structure of roadway surrounding rock, the principal stress trace line is proposed to visualize the stress field. The structure of the stress field is characterized by the location and type of the degenerated points in the principal stress trace diagram and the distribution of the dominant principal stress trace bundles. The roadways under different lateral pressure coefficients and rock combination conditions are numerically simulated. According to the simulation results, the principal stress track diagram is drawn by hand, and the general law of the structural change of surrounding rock stress field of roadway is obtained. The results show that the stress track diagram is an effective method to characterize the stress field structure of surrounding rock of roadway. There is a clear relationship between the failure of surrounding rock and the structure of stress field in roadway, which provides a new idea for the study of control theory of roadway surrounding rock.
【作者单位】：西安科技大学安全科学与工程学院;中国矿业大学煤炭资源与安全开采国家重点实验室;
【基金】：国家自然科学基金资助项目(51404190,51404189) 中国矿业大学煤炭资源与安全开采国家重点实验室开放研究基金资助项目(13KF07) 中国博士后科学基金资助项目(2015M572655XB)
【分类号】：TD322

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