Rock and Soil Mechanics ›› 2022, Vol. 43 ›› Issue (S1): 469-478.doi: 10.16285/j.rsm.2020.1951

• Geotechnical Engineering • Previous Articles     Next Articles

Step by step and combined supporting technique with steel grid frame for soft and fractured rock roadway

LIU Xue-wei1, LIU Quan-sheng2, WANG Zhi-qiang1, LIU Bin1, KANG Yong-shui1, WANG Chuan-bing3   

  1. 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China; 2. Key Laboratory of Safety for Geotechnical and Structural Engineering of Hubei Province, Wuhan University, Wuhan, Hubei 430072, China; 3. Huainan Mining (Group) Co. Ltd., Huainan, Anhui 232001, China
  • Received:2020-12-30 Revised:2022-03-30 Online:2022-06-30 Published:2022-07-15
  • Supported by:
    This work was supported by the Nation Natural Science Foundation of China(41807249, 51774267), the Natural Science Foundation of Hubei Province(2019CFB535).

PDF (Chinese)

109

Abstract: Aiming at the difficult problems of the large deformation in deep and soft rock roadways, the reasons of large deformation are first analyzed for roadways in Panshan coal mine, Huainan, China. On this basis, step by step and combined supporting technique with steel grid frame for soft and fractured rock roadway, including steel grid + primary bolt and cable, initial shotcrete, shallow grouting, pre-stressed bolts, further shotcrete with thickness of 150 mm, deep grouting, and pre-stressed cables, was proposed for deep weak and fractured rock roadway. Furthermore, the control principle of grid arch support is analyzed, and the optimal support parameters (diameter of steel is 20 mm and space between frames is 700 mm) are determined by FLAC3D. The comparative analysis shows that both of the initial deformation rate and final convergence deformation of the steel grid technique are larger than that of the steel support, however, the roadway deformation can quickly converge after the addition of the secondary support was applied. The monitoring results showed that the reasonable period for applying pre-stressed bolt/cable is after about 10 days of shallow/deep grouting. The time between pre-stressed bolt and deep grouting that is set as 2 weeks will be better. Therefore, step by step and combined supporting technique with steel grid frame proposed here can provide an effective method for the soft rock roadway control in deep and soft coal mines.

Key words: rock mechanics, deep mining, soft rock roadway, steel grid frame, supporting technique

CLC Number: 

  • TD353
[1] CEN Duo-feng, LIU Chang, HUANG Da. Tensile-shear mechanical property of limestone bedding planes and effect of bedding plane undulation [J]. Rock and Soil Mechanics, 2022, 43(S1): 77-87.
[2] WANG Gang, SONG Lei-bo, LIU Xi-qi, BAO Chun-yan, LIN Man-qing, LIU Guang-jian, . Shear fracture mechanical properties and acoustic emission characteristics of discontinuous jointed granite [J]. Rock and Soil Mechanics, 2022, 43(6): 1533-1545.
[3] TANG Xu-hai, XU Jing-jing, ZHANG Yi-heng, HE Qi, WANG Zheng-zhi, ZHANG Guo-ping, LIU Quan-sheng, . Determining mechanical parameters of asteroid rocks using NWA13618 meteorites and microscopic rock mechanics experiment [J]. Rock and Soil Mechanics, 2022, 43(5): 1157-1163.
[4] JIANG Yue, ZHOU Hui, LU Jing-jing, GAO Yang, . True triaxial test on hollow cylindrical sandstone [J]. Rock and Soil Mechanics, 2022, 43(4): 932-944.
[5] CHENG Tan, GUO Bao-hua, SUN Jie-hao, TIAN Shi-xuan, SUN Chong-xuan, CHEN Yan, . Establishment of constitutive relation of shear deformation for irregular joints in sandstone [J]. Rock and Soil Mechanics, 2022, 43(1): 51-64.
[6] HUANG Na, JIANG Yu-jing, CHENG Yuan-fang, LIU Ri-cheng, . Experimental and numerical study of hydraulic properties of three-dimensional rough fracture networks based on 3D printing technology [J]. Rock and Soil Mechanics, 2021, 42(6): 1659-1668.
[7] QI Fei-fei, ZHANG Ke, XIE Jian-bin, . Fracturing mechanism of rock-like specimens with different joint densities based on DIC technology [J]. Rock and Soil Mechanics, 2021, 42(6): 1669-1680.
[8] WU Dong-yang, YU Li-yuan, SU Hai-jian, WU Jiang-yu, LIU Ri-cheng, ZHOU Jian. Experimental study and PFC3D simulation on crack propagation of fractured rock-like specimens with bolts under uniaxial compression [J]. Rock and Soil Mechanics, 2021, 42(6): 1681-1692.
[9] CHEN Xi, ZENG Ya-wu, . A new three-dimensional roughness metric based on Grasselli’s model [J]. Rock and Soil Mechanics, 2021, 42(3): 700-712.
[10] LIU Xiang-hua, ZHANG Ke, LI Na, QI Fei-fei, YE Jin-ming, . Quantitative identification of the failure behavior of the 3D printed rock-like specimen with one hole and two flaws [J]. Rock and Soil Mechanics, 2021, 42(11): 3017-3028.
[11] ZHANG Ke, QI Fei-fei, CHEN Yu-long, . Deformation and fracturing characteristics of fracture network model and influence of filling based on 3D printing and DIC technologies [J]. Rock and Soil Mechanics, 2020, 41(8): 2555-2563.
[12] HUANG Wei, XIAO Wei-min, TIAN Meng-ting, ZHANG Lin-hao, . Model test research on the mechanical properties of irregular columnar jointed rock masses [J]. Rock and Soil Mechanics, 2020, 41(7): 2349-2359.
[13] JIN Jun-chao, SHE Cheng-xue, SHANG Peng-yang. A strain-softening model of rock based on Hoek-Brown criterion [J]. Rock and Soil Mechanics, 2020, 41(3): 939-951.
[14] MA Qiu-feng, QIN Yue-ping, ZHOU Tian-bai, YANG Xiao-bin. Development and application of contact algorithms for rock shear fracture surface [J]. Rock and Soil Mechanics, 2020, 41(3): 1074-1085.
[15] ZHANG Yan-bo, SUN Lin, YAO Xu-long, LIANG Peng, TIAN Bao-zhu, LIU Xiang-xin, . Experimental study of time-frequency characteristics of acoustic emission key signals during granite fracture [J]. Rock and Soil Mechanics, 2020, 41(1): 157-165.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] YAO Yang-ping, HOU Wei. Basic mechanical behavior of soils and their elastoplastic modeling[J]. , 2009, 30(10): 2881 -2902 .
[2] XU Jin-ming, QIANG Pei, ZHANG Peng-fei. Texture analysis of photographs of silty clay[J]. , 2009, 30(10): 2903 -2907 .
[3] XIANG Tian-bing, FENG Xia-ting, CHEN Bing-rui, JIANG Quan, ZHANG Chuan-qing. Rock failure mechanism and true triaxial experimental study of specimens with single structural plane under three-dimensional stress[J]. , 2009, 30(10): 2908 -2916 .
[4] SHI Yu-ling, MEN Yu-ming, PENG Jian-bing, HUANG Qiang-bing, LIU Hong-jia. Damage test study of different types structures of bridge decks by ground-fissure[J]. , 2009, 30(10): 2917 -2922 .
[5] XIA Dong-zhou, HE Yi-bin, LIU Jian-hua. Study of damping property and seismic action effect for soil-structure dynamic interaction system[J]. , 2009, 30(10): 2923 -2928 .
[6] XU Su-chao, FENG Xia-ting, CHEN Bing-rui. Experimental study of skarn under uniaxial cyclic loading and unloading test and acoustic emission characteristics[J]. , 2009, 30(10): 2929 -2934 .
[7] ZHANG Li-ting, QI Qing-lan, WEI Jing HUO Qian, ZHOU Guo-bin. Variation of void ratio in course of consolidation of warping clay[J]. , 2009, 30(10): 2935 -2939 .
[8] ZHANG Qi-yi. Study of failure patterns of foundation under combined loading[J]. , 2009, 30(10): 2940 -2944 .
[9] YI Jun, JIANG Yong-dong, XUAN Xue-fu, LUO Yun, ZHANG Yu. A liquid-solid dynamic coupling modelof ultrasound enhanced coalbed gas desorption and flow[J]. , 2009, 30(10): 2945 -2949 .
[10] TAO Gan-qiang, YANG Shi-jiao, REN Feng-yu. Experimental research on granular flow characters of caved ore and rock[J]. , 2009, 30(10): 2950 -2954 .
Copyright © Rock and Soil Mechanics, All Rights Reserved.
Tel: 027-87198484, 87199252, 87199253, 87198752　E-mail: ytlx@whrsm.ac.cn
Powered by Beijing Magtech Co. Ltd