地应力测量技术研究与巷道支护工程应用
发布时间：2019-06-12 17:12
【摘要】：徐庄煤矿-750水平东翼轨道大巷为永久性服务大巷,在巷道掘进期间,巷道施工完成段的顶底板均出现不同程度的变形破坏。针对巷道的异常变形,有必要对影响煤岩体结构安全与稳定的关键因素——地应力,进行探索与研究。本文在对地应力测量理论、影响因素、计算误差、测试系统及过程等深入研究的基础上,在徐庄煤矿-750水平大巷东翼进行了地应力实测,并结合实测参数采用锚杆支护动态设计法进行了加固修复设计,研究工作获得主要结论有:(1)通过对地应力测量理论、地应力测量系统与测试过程研究的基础上,在实验室进行了三轴应变计的标定,并编制了相应的地应力计算软件。(2)采用空心包体应力解除法对徐庄煤矿-750水平东翼轨道大巷与Ⅱ-Ⅰ采区通风下口进行了地应力现场实测,实测结果表明:徐庄煤矿二水平东翼区域以水平构造应力为主,东西布置的轨道大巷承受近垂直的剪应力作用。(3)基于地应力实测的数值模拟修复设计,应用于轨道大巷修复加固工程,矿压观测结果表明,巷道围岩变形趋于稳定。
[Abstract]:In Xuzhuang Coal Mine-750 horizontal east wing track, the main roadway is a permanent service roadway. During the driving of the laneway, different degrees of deformation and failure occur in the top floor of the tunnel construction completion section. In view of the abnormal deformation of the tunnel, it is necessary to explore and study the key factors that influence the safety and stability of the structural safety and stability of the coal rock mass. In this paper, on the basis of the in-depth study of the geostress measurement theory, the influence factors, the calculation error, the test system and the process, the ground stress measurement is carried out in the east wing of the horizontal large-lane of Xuzhuang Coal Mine-750, and the design of the reinforcement and repair is carried out by using the dynamic design method of the bolt support in combination with the measured parameters. The main conclusions are as follows: (1) The three-axis strain gauge calibration is carried out in the laboratory based on the ground stress measurement theory, the in-situ stress measurement system and the test process, and the corresponding ground stress calculation software is prepared. (2) The stress relief method of the hollow bag body is adopted to measure the ground stress field in the tunnel of the east wing of the horizontal east wing of Xuzhuang Coal Mine-750 and the ventilation port of the 鈪，
本文编号：2498169
[Abstract]:In Xuzhuang Coal Mine-750 horizontal east wing track, the main roadway is a permanent service roadway. During the driving of the laneway, different degrees of deformation and failure occur in the top floor of the tunnel construction completion section. In view of the abnormal deformation of the tunnel, it is necessary to explore and study the key factors that influence the safety and stability of the structural safety and stability of the coal rock mass. In this paper, on the basis of the in-depth study of the geostress measurement theory, the influence factors, the calculation error, the test system and the process, the ground stress measurement is carried out in the east wing of the horizontal large-lane of Xuzhuang Coal Mine-750, and the design of the reinforcement and repair is carried out by using the dynamic design method of the bolt support in combination with the measured parameters. The main conclusions are as follows: (1) The three-axis strain gauge calibration is carried out in the laboratory based on the ground stress measurement theory, the in-situ stress measurement system and the test process, and the corresponding ground stress calculation software is prepared. (2) The stress relief method of the hollow bag body is adopted to measure the ground stress field in the tunnel of the east wing of the horizontal east wing of Xuzhuang Coal Mine-750 and the ventilation port of the 鈪，
本文编号：2498169
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