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HE Fu-lian, XU Lei, WU Huan-kai, LI Tong-da. Deviatoric stress transfer and stability of surrounding rock in large-section open-off cut roof[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(6): 1122-1128. DOI: 10.11779/CJGE201406018
Citation: HE Fu-lian, XU Lei, WU Huan-kai, LI Tong-da. Deviatoric stress transfer and stability of surrounding rock in large-section open-off cut roof[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(6): 1122-1128. DOI: 10.11779/CJGE201406018

Deviatoric stress transfer and stability of surrounding rock in large-section open-off cut roof

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  • Received Date: September 15, 2013
  • Published Date: June 19, 2014
  • To study the control mechanism of large-section open-off cut roof, No. 5205 open-off cut in a coal mine is selected as an engineering case. The deviatoric stress of roof, fracture field and deformation law are investigated by UDEC4.0 in the change process of width from 6 to 10 m. The results show that: (1) The deviatoric stress of roof gradually increases in shallow part and decreases in deep part. The wider the open-off cut, the lower the deviatoric stress in shallow part and the higher in deep part and the same time the peak of deviatoric stress is moving to the deeper part; (2) The fracture fild in surrounding rock were divided into three areas: fracture transfixion area, fracture area and microfracture area, which distributed as semi-ellipse; (3) With the width of open-off cut increasing, The trend of microfracture area transformed to fracture area and fracture area transformed to fracture transfixion area are strengthed in the roof. Besides, the roof subsidence is aggravated. It believed that: (1) The stability of unstable triangle block is the more important to keep roof safe; (2) High-performance bolt can control fracture slip preferably; (3) Double-truss and anchor rope can be anchored in the shoulder non-fracture area and deep roof pre-stressed superimposed area, which can control the expansion and deformation of fracture transfixion area in the middle part of the roof. Based on this, the combined support technology of high-strength and high pre-tension bolt& net &bar and double-truss and anchor rope is proposed. The observed results of mining pressures show that the open-off cut is self-stabilized after it is dug out for 10 days; the relative convergence of roof-to-floor is 128 mm; the relative convergence of both sides is 96 mm; and the separation of roof is 4 mm.
  • [1]
    殷宗泽, 袁俊平, 韦杰, 等. 论裂隙对膨胀土边坡稳定的影响[J]. 岩土工程学报, 2012, 34(12): 2155-2161. (YIN Zong-ze, YUAN Jun-ping, WEI Jie, et al. Influences of fissures on slope stability of expansive soil[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(12): 2155-2161. (in Chinese))
    [2]
    张农, 许兴亮, 李桂臣. 巷道围岩裂隙演化规律及渗流灾害控制[J]. 岩石力学与工程学报, 2009, 28(2): 330-335. (ZHANG Nong, XU Xing-liang, LI Gui-chen. Fissure-evolving laws of surrounding rock mass of roadway and control of seepage disasters[J]. Chinese Journal of Rock Mechanics and Engineering, 2009, 28(2): 330-335. (in Chinese))
    [3]
    代进, 蒋金泉. 巷道围岩中的裂隙发展与弱结构体[J]. 采矿与安全工程学报, 2006(3): 311-315. (DAI Jin, JIANG Jin-quan. Fracture development and weak structurein surrounding rock of roadway[J]. Journal of Mining & Safety Engineering, 2006(3): 311-315. (in Chinese))
    [4]
    王忠昶, 栾茂田, 杨庆, 等. 裂隙岩体锚固止裂的数值模拟研究[J]. 岩石力学与工程学报, 2007, 26(增刊1): 3446-3451. (WANG Zhongchang, LUAN Maotian, YANG Qing,et al. Study on numerical simulation of reinforcement on crack prevention of jointed rockmass[J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(S1): 3446-3451. (in Chinese))
    [5]
    潘岳, 李爱武, 戚云松. 圆巷开挖围岩偏应力应变能生成的分析解与图解[J]. 岩土工程学报, 2007, 29(12): 1780-1786. (PAN Yue, LI Ai-wu, QI Yun-song. Analysis and illustration on deviatoric stress strain energy generation of surrounding rock in circuar tunnel excavation[J]. Chinese Journal of Geotechnical Engineering, 2007, 29(12): 1780-1786. (in Chinese))
    [6]
    郭志飚, 李乾, 王炯. 深部软岩巷道锚网索-桁架耦合支护技术及其工程应用[J]. 岩石力学与工程学报, 2009(增刊2): 3914-3919. (GUO Zhi-biao, LI Qian, WANG Jiong. Coupled bolt-mesh-anchor-truss supporting technology and its engineering application to deep soft rock roadway[J]. Chinese Journal of Rock Mechanics and Engineering, 2009(S2): 3914-3919. (in Chinese))
    [7]
    潘岳, 王志强, 吴敏应. 巷道开挖围岩能量释放与偏应力应变能生成的分析计算[J]. 岩土力学, 2007, 28(4): 663-669. (PAN Yue, WANG Zhi-qiang, WU Min-ying. Analysis and calculation of energy release and deviatoric stress energy generation of surrounding rock in tunnel excavation process[J]. Rock and Soil Mechanics, 2007, 28(4): 663-669. (in Chinese))
    [8]
    徐光, 许家林, 吕维赟, 等. 采空区顶板导水裂隙侧向边界预测及应用研究[J]. 岩土工程学报, 2010, 32(5): 724-730. (XU Guang, XU Jia-lin, LÜ Wei-yun, et al. Lateral boundary prediction of water conducting fracture formed in roof and its application[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(5): 724-730. (in Chinese))
    [9]
    徐建光, 张平, 李宁. 循环荷载下断续裂隙岩体的变形特性[J]. 岩土工程学报, 2008, 30(6): 802-806. (XU Jian-guang, ZHANG Ping, LI Ning. Deformation properties of rock mass with intermittent cracks under cyclic loading[J]. Chinese Journal of Geotechnical Engineering, 2008, 30(6): 802-806. (in Chinese))
    [10]
    鲁岩, 邹喜正, 刘长友. 基于修正普氏拱的巷道锚杆支护技术[J]. 采矿与安全工程学报, 2007(4): 461-464. (LU Yan, ZOU Xi-zheng, LIU Chang-you. Roadway bolt supporting technique basedon modified natural arch[J]. Journal of Mining & Safety Engineering, 2007(4): 461-464. (in Chinese))
    [11]
    李术才, 陈云娟, 朱维申, 等. DDARF中锚杆失效及收敛判据的研究[J]. 岩土工程学报, 2013, 35(9): 1606-1611. (LI Shu-cai, CHEN Yun-juan, ZHU Wei-shen, et al. Failure and convergence criteria for bolts in DDARF[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(9): 1606-1611. (in Chinese))
    [12]
    张宁, 李术才, 吕爱钟, 等. 拉伸条件下锚杆对含表面裂隙类岩石试样加固效应试验研究[J]. 岩土工程学报, 2011, 33(5): 769-776. (ZHANG Ning, LI Shu-cai, LÜ Ai-zhong, et al. Experimental study on reinforced effect of bolts on 3D surface fractured rock under uniaxial tension[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(5): 769-776. (in Chinese))
    [13]
    严红, 何富连, 徐腾飞. 深井大断面煤巷双锚索桁架控制系统的研究与实践[J]. 岩石力学与工程学报, 2012, 31(11): 2248-2257. (YAN Hong, HE Fu-lian, XU Teng-fei. Study of double-cable-truss controlling system for large section coal roadway of deep mine and its practice[J]. Journal of China Coal Society, 2012, 31(11): 2248-2257. (in Chinese))
    [14]
    李占金, 唐强达, 齐干. 鹤煤五矿深部交岔点大断面软岩巷道支护对策研究[J]. 岩土工程学报, 2010, 32(4): 514-520. (LI Zhan-jin, TANG Qiang-da, QI Gan. Supporting strategy for large span intersection in deep soft rock roadway of the Fifth Coal Mine of Hebei Coal Group[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(4): 514-520. (in Chinese))
    [15]
    康红普, 林健, 杨景贺, 等. 松软破碎硐室群围岩应力分布及综合加固技术[J]. 岩土工程学报, 2011, 33(5): 808-814. (KANG Hong-pu, LIN Jian, YANG Jing-he, et al. Stress distribution and synthetic reinforcing technology for chamber group with soft and fractured surrounding rock[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(5): 808-814. (in Chinese))
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