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首页> 外文期刊>Environmental earth sciences >Excavation damaged zone depths prediction for TBM-excavated roadways in deep collieries
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Excavation damaged zone depths prediction for TBM-excavated roadways in deep collieries

机译：深井巷TBM掘进巷道开挖损伤带深度预测

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摘要

The excavation works at underground mines create excavation damage zone (EDZ) in surrounding rocks around roadway geometry. The EDZ depth is a critical parameter for stability analysis, risk assessment support design and toxic waste leakage. This paper proposed an innovative EDZ depth prediction based on a modified nonlinear Mohr failure criterion and modification of conventional analytical solution by means of perturbation method. A set of cyclic loading tests of surrounding rock of roadways are conducted, and a modified Mohr failure criterion of rocks under cyclic loading path of TBM excavation is established on the basis of test results. Moreover, perturbation method was introduced for enhancing calculation accuracy. In order to verify the proposed analytical solution, a set of in situ digital panoramic borehole camera image monitoring was carried out within the roadways and the monitoring results correlated well with the proposed analytical solution. The EDZ geometries of roadways in deep mines are typically oval, and the EDZ depth is influenced by ground stress magnitude, lateral coefficient and support stress significantly. Through the proposed analytical solution, a more accurate prediction of EDZ depth of roadways can be obtained conveniently before the excavation works.
机译：地下矿山的开挖工作在巷道几何形状周围的围岩中创建了开挖破坏区（EDZ）。 EDZ深度是稳定性分析，风险评估支持设计和有毒废物泄漏的关键参数。本文提出了一种创新的EDZ深度预测方法，该方法基于修正的非线性Mohr破坏准则，并采用扰动方法修正了常规解析解。进行了一套巷道围岩的循环荷载试验，并根据试验结果建立了修正的TBM开挖循环荷载路径下岩石的莫尔破坏准则。此外，引入了扰动方法以提高计算精度。为了验证所提出的分析解决方案，在巷道内进行了一组现场数字全景井眼摄像机图像监测，监测结果与所提出的分析解决方案具有很好的相关性。深井巷道的EDZ几何形状通常为椭圆形，并且EDZ深度受地面应力大小，侧向系数和支撑应力的影响很大。通过所提出的解析解决方案，可以在开挖工作之前方便地获得更准确的巷道EDZ深度预测。

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  • 来源
    《Environmental earth sciences》 |2018年第5期|165.1-165.14|共14页
  • 作者

    Tang Bin; Cheng Hua; Tang Yongzhi; Yao Zhishu; Li Mingjing; Zheng Tenglong; Lin Jian;

  • 作者单位

    Anhui Univ Sci & Technol, Sch Civil Engn & Architecture, 168 Taifeng St, Huainan 232001, Peoples R China;

    Anhui Univ Sci & Technol, Sch Civil Engn & Architecture, 168 Taifeng St, Huainan 232001, Peoples R China;

    Huainan Min Ind Grp Co Ltd, 1 Dongshan Middle Rd, Huainan 232001, Peoples R China;

    Anhui Univ Sci & Technol, Sch Civil Engn & Architecture, 168 Taifeng St, Huainan 232001, Peoples R China;

    Anhui Univ Sci & Technol, Sch Civil Engn & Architecture, 168 Taifeng St, Huainan 232001, Peoples R China;

    Anhui Univ Sci & Technol, Sch Civil Engn & Architecture, 168 Taifeng St, Huainan 232001, Peoples R China;

    Anhui Univ Sci & Technol, Sch Civil Engn & Architecture, 168 Taifeng St, Huainan 232001, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    EDZ; Analytical solution; Triaxial cyclic loading tests; Nonlinear Mohr failure criterion; Perturbation method; DPBCI;

    机译：EDZ;解析解;三轴循环荷载试验;非线性莫尔破坏准则;摄动法;DPBCI;

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