Rock and Soil Mechanics ›› 2022, Vol. 43 ›› Issue (12): 3221-3230.doi: 10.16285/j.rsm.2022.0078

• Fundamental Theroy and Experimental Research •     Next Articles

Grouting test and reinforcement mechanism analysis of rock with single penetrated fracture surface

ZHU Yong-jian1, 2, REN Heng2, WANG Ping1, 3, LI Peng2, WANG Xi-zhi2, WEI Ming-xing2   

  1. 1. Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Goal Mines, Hunan University of Science and Technology, Xiangtan, Hunan 411201, China; 2. School of Resource & Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201, China; 3. Hunan Provincial Key Laboratory of Safe Mining Techniques of Coal Mines, Hunan University of Science and Technology, Xiangtan, Hunan 411201, China
  • Received:2022-01-15 Revised:2022-04-22 Online:2022-12-28 Published:2023-01-02
  • Supported by:
    This work was supported by the General Program of National Natural Science Foundation of China (51774130, 52174110) and the Hunan Province Natural Science Foundation (2021JJ30273).

PDF (Chinese)

283

PDF (English)

15

Abstract: For the problem that how the grouting reinforcement of a single penetrated structural plane affects the bearing capacity of surrounding rock, an approach of making rock samples with single penetrated fracture surface is proposed firstly, and the rock samples are injected with ultra-fine cement and epoxy resin, respectively. Then, the strength and deformation characteristics of the consolidated body under uniaxial (triaxial) compression are investigated with the RMT-150C experimental system. Finally, the micro consolidation mechanism of structural plane grouting is revealed by means of theoretical analysis and electron microscope scanning. It is found that the fracture surface generated under triaxial loading-unloading condition is closer to the engineering practice and meets the experimental requirements. The stress-strain characteristic curves of the specimens injected with superfine cement show phased deformation characteristics, and the curves of the specimens injected with epoxy resin are relatively smooth. For the strength characteristics, the influence of confining pressure is significantly larger than that of grouting material selection. Grouting reinforcement can improve the residual strength of rock mass. With the increase of confining pressure, the increase of improvement coefficient of residual strength is less obvious, and the peak strength of consolidated body is closer to that of intact rock. For the failure characteristics, the main fracture surface of the specimen injected with ultra-fine cement shears and slips along the original fracture surface, and the main fracture surface of the specimen injected with epoxy resin is a new penetrated fracture surface. Finally, based on the Mohr-Coulomb criterion, the relationship between the bonding force of grouting materials and the strength improvement coefficient of structural plane is established. It is found that the strength improvement coefficient of structural plane has a linear relationship with the bonding force of grout. The comparison between calculation and test results shows that the formula is reasonable and can provide reference for the optimization of deep surrounding rock support.

Key words: structural plane, grouting materials, strength, failure characteristics, reinforcement mechanism

CLC Number: 

  • TU457
[1] LIN Hai, ZENG Yi-fan, ZHOU Chuang-bing, DONG Ping-xiao, SHI Jian-yong, . Experimental research on the shear characteristics of the composite liner consisting of wrinkled geomembrane and needle punched geosynthetic clay liner [J]. Rock and Soil Mechanics, 2023, 44(2): 355-361.
[2] WANG Yuan-zhan, GONG Xiao-long, WANG Xuan, CHEN Yan-ping, XIE Tao, . Study on cyclic cumulative pore pressure and strength evolution of soda residue soil under anisotropic consolidation [J]. Rock and Soil Mechanics, 2023, 44(2): 373-380.
[3] ZHANG Zhi-fei, HUANG Man, TANG Zhi-cheng, . Empirical criterion for evaluating the peak shear strength of discontinuity with different joint wall strengths [J]. Rock and Soil Mechanics, 2023, 44(2): 507-519.
[4] WANG Cao, AYYUB B. M., KUMARI W. G. P. . Resilience model for coastal-building foundations with time-variant soil strength due to water intrusion in a changing climate [J]. Rock and Soil Mechanics, 2023, 44(1): 67-74.
[5] WEI Li, CHAI Shou-xi, LIU Zhu, WANG Pei, LI Fang, . Evaluation on compressive strength of fiber reinforced soil under freeze-thaw cycles by scanning election microscopy and nuclear magnetic resonance [J]. Rock and Soil Mechanics, 2022, 43(S2): 163-170.
[6] XIAO Han, DONG Chao-qiang, ZHANG Rong-jun, LU Zhan, ZHENG Jun-jie. Effect of quicklime on solidification efficiency of mud slurry treated by physicochemical composite method [J]. Rock and Soil Mechanics, 2022, 43(S2): 214-222.
[7] CHENG Wen-chieh, HU Wen-le, YUAN Ke, WEN Shao-jie, . Study on the enhancement and degradation mechanisms of urease mineralization and its application in strengthening water resistance of antique-style clay tiles [J]. Rock and Soil Mechanics, 2022, 43(S2): 255-264.
[8] ZHANG Tao-lin, GENG Han-sheng, XU Hong-fa, MO Jia-quan, LIN Yi-fan, MA Lin-jian. Experimental study on calcareous sand grout material preparation and performance of consolidated solids [J]. Rock and Soil Mechanics, 2022, 43(S2): 327-336.
[9] ZHANG Wen-lian, SUN Xiao-yun, CHEN Yong, JIN Shen-yi, . Slope stability analysis method based on compressive strength reduction of rock mass [J]. Rock and Soil Mechanics, 2022, 43(S2): 607-615.
[10] LIU Kuan, YE Wan-jun, GAO Hai-jun, DONG Qi, . Evolution law and microscopic mechanism of shear strength of acid- or alkali-contaminated loess [J]. Rock and Soil Mechanics, 2022, 43(S1): 1-12.
[11] TANG Hua, YAN Song, YANG Xing-hong, WU Zhen-jun, . Shear strength and microstructure of completely decomposed migmatitic granite under different water contents [J]. Rock and Soil Mechanics, 2022, 43(S1): 55-66.
[12] ZENG Li-feng, SHAO Long-tan, GUO Xiao-xia, . Origin and development of the concept of effective stress for soils [J]. Rock and Soil Mechanics, 2022, 43(S1): 127-144.
[13] YU Cheng-cheng, LU Zheng, YAO Hai-lin, LIU Jie, ZHAN Yong-xiang, . Experimental study of modifying expansive soils using microbial induced calcite precipitation [J]. Rock and Soil Mechanics, 2022, 43(S1): 157-163.
[14] CHAI Shao-bo, ZHOU Tao, TIAN Wei, JING Yan-lin, SHI Jie-hui. Analysis of stress wave propagation through a rock structural plane considering rock mass stresses [J]. Rock and Soil Mechanics, 2022, 43(S1): 184-192.
[15] LI Li-hua, FANG Ya-nan, XIAO Heng-lin, LI Wen-tao, CAO Yu, XU Ke, . Characterization of Cd-contaminated soil solidified/stabilized by red mud-based binders [J]. Rock and Soil Mechanics, 2022, 43(S1): 193-202.
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