Mechanical analysis of water barrier performance of floor layered structure key stratum on coal face

被引：0
|
作者：
Lu, Haifeng [1 ]
Meng, Xiangshuai [1 ]
Zhang, Yuan [1 ]
Yao, Duoxi [1 ]
机构：
[1] School of Earth and Environment, Anhui University of Science & Technology, Huainan,232001, China
来源：
Zhongguo Kuangye Daxue Xuebao/Journal of China University of Mining and Technology | 2020年 / 49卷 / 06期
关键词：
According to the characteristics of layered structure of coal measure rock mass and considering the effect of ground stress; the key stratum of water insulation is generalized as a fixed beam subjected to vertical and horizontal loads. The failure modes of it such as generate layering when shearing along bedding plane; compression shear at the end and bending tension are summarized systematically; and corresponding mechanical criteria are given. According to the rotating angle equation and the geometric relationship of the deformation of the composite beam; the contact pressure solution model considering the interlayer slip was established. On this basis; the critical internal pressure of composite beam in key stratum was calculated iteratively. The influence rules of thickness of each beam in composite beam; contact friction; thickness of the key stratum; strength of the bedding surface and lateral pressure coefficient on the impermeability of key stratum were analyzed. The results show that once key stratum changes from the whole to the layered combined stress; bending stress will increase greatly. The stress will be not reduced effectively by increasing contact friction between beams; and the improvement of water blocking capacity will be limited. The greater the thickness of the key layer and the lower the shear strength of the bedding plane; the possibility of delamination along the bedding plane is increased. With the increase of lateral pressure coefficient; the failure mode of key stratum can be changed from overall bending and pulling; shear along bedding plane to overall compression and shear failure. In the actual project; it is necessary to strengthen the exploration and strength test of key stratum's bedding plane; weak interlayer and other structural planes; and accurately analyze the failure mode so as to make judgment of water inrush risk more reliable. © 2020; Editorial Board of Journal of CUMT. All right reserved;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
引用
收藏
页码：1057 / 1066
相关论文
共 50 条
  • [31] A study on mechanical principle of floor heave of roadway driving along next goaf in coal face with fully mechanized top-coal caving
    Wang, WJ
    Hou, CJ
    Li, XH
    ROCK MECHANICS IN THE NATIONAL INTEREST, VOLS 1 AND 2, 2001, : 351 - 354
  • [32] The water isolating and hydrogeological structure characteristics for upper member of cambrian limestone in coal floor
    Xu, Zhi-Min
    Sun, Ya-Jun
    Sui, Wang-Hua
    Zhang, Guo-Wei
    Li, Shi
    Huang, Xin-Lei
    Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering, 2010, 27 (03): : 399 - 403
  • [33] Prediction of water inrush from coal floor based on Fisher discriminant analysis
    Huang, Pinghua
    Chen, Jiansheng
    FRONTIERS OF GREEN BUILDING, MATERIALS AND CIVIL ENGINEERING, PTS 1-8, 2011, 71-78 : 4211 - 4214
  • [34] Layered structure graphene oxide/methylcellulose composites with enhanced mechanical and gas barrier properties
    Layek, Rama Kanta
    Ramakrishnan, Karthik Ram
    Sarlin, Essi
    Orell, Olli
    Kanerva, Mikko
    Vuorinen, Jyrki
    Honkanen, Mari
    JOURNAL OF MATERIALS CHEMISTRY A, 2018, 6 (27) : 13203 - 13214
  • [35] Mechanical structure and seepage stability of confined floor response to longwall mining of inclined coal seam
    Liang, Shuai-shuai
    Zhang, Dong-sheng
    Fan, Gang-wei
    Kovalsky, Evgeny
    Fan, Zhang-lei
    Zhang, Lei
    Han, Xue-sen
    JOURNAL OF CENTRAL SOUTH UNIVERSITY, 2023, 30 (09) : 2948 - 2965
  • [36] Seismic mechanism of coal pillar⁃key layer structure in fully mechanized caving face of inclined thick coal seam
    Wang, Gaoang
    Zhu, Sitao
    Jiang, Fuxing
    Zhang, Xiufeng
    Liu, Jinhai
    Wang, Xuyou
    Ning, Tingzhou
    Zhang, Yu
    Wei, Quande
    Meitan Xuebao/Journal of the China Coal Society, 2022, 47 (06): : 2289 - 2299
  • [37] Bending energy storage mechanical model of layered composite roof structure in coal mining
    Zhang, Peng-fei
    Gu, Xue-bin
    Guo, Wei-yao
    Zhao, Tong-bin
    Gong, Xu-fei
    Zhu, Zhi-qian
    Guo, Lei
    SCIENTIFIC REPORTS, 2024, 14 (01):
  • [38] Mechanical Analysis of Water Cellar Structure
    Huo, Jindong
    Zhang, Qi
    Peng, Hongtao
    Wang, Jun
    Peng, Xiaofeng
    SPORTS, ARTS MATERIALS AND MANAGEMENT SCIENCE, 2012, 507 : 231 - +
  • [39] Numerical Analysis of the Water-blocking Performance of a Floor with a Composite Structure under Fluid–solid Coupling
    Ang Li
    Qian Mu
    Li Ma
    Chaoyang Liu
    Shengquan Wang
    Feng Wang
    Lin Mou
    Mine Water and the Environment, 2021, 40 : 479 - 496
  • [40] Preventing water-inrush from floor in coal working face with paste-like backfill technology
    Qu, Xingyue
    Shi, Longqing
    Han, Jin
    SCIENTIFIC REPORTS, 2023, 13 (01)
12345