›› 2009, Vol. 30 ›› Issue (12): 3715-3719.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Research on mechanical properties of coal and its application

GUAN Ling-li, TIAN Hong-ming, CHEN Wei-zhong   

  1. Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
  • Received:2009-11-28 Online:2009-12-10 Published:2010-01-18

PDF (Chinese)

2828

Abstract:

The deformation failure mechanism of coal and the effect of initial cracks and closure on coal strength. The research results show that the process of coal failure can be divided into five stages, including damage degradation, quasi-linearity, damage steady evolution, damage accelerating evolution and post-peak softening. With closure of massive initial fractures and void structures in the Shenfu’s coal, the strength and the elastic modulus of coal will be improved significantly. So, it’s more reasonable to simulate the excavation process by using elastic modulus which has been improved. Acoording to the numerical simulation results, the reasonale thickness of supporting is chosen as 20-25 cm.

Key words: coal of Shenfu, damage evolution, numerical simulation

CLC Number: 

  • TU 45
[1] LI Fan-fan, CHEN Wei-zhong, LEI Jiang, YU Hong-dan, MA Yong-shang, . Study of mechanical properties of claystone based on plastic damage [J]. Rock and Soil Mechanics, 2020, 41(1): 132-140.
[2] XIA Kun, DONG Lin, PU Xiao-wu, LI Lu. Earthquake response characteristics of loess tableland [J]. Rock and Soil Mechanics, 2020, 41(1): 295-304.
[3] SONG Yong-jun, YANG Hui-min, ZHANG Lei-tao, REN Jian-xi. CT real-time monitoring on uniaxial damage of frozen red sandstone [J]. Rock and Soil Mechanics, 2019, 40(S1): 152-160.
[4] GUO Yuan-cheng, LI Ming-yu, ZHANG Yan-wei, . Incremental analytical method for prestressed anchor and soil nail wall composite support system [J]. Rock and Soil Mechanics, 2019, 40(S1): 253-258.
[5] YAN Guo-qiang, YIN Yue-ping, HUANG Bo-lin, ZHANG Zhi-hua, DAI Zhen-wei, . Formation mechanism and deformation characteristics of Jinjiling landslide in Wushan, Three Gorges Reservoir region [J]. Rock and Soil Mechanics, 2019, 40(S1): 329-340.
[6] LIU Hong-yan. Influence of macroscopic and mesoscopic flaws on mechanical behavior of rock mass and slope stability [J]. Rock and Soil Mechanics, 2019, 40(S1): 431-439.
[7] JIN Ai-bing, LIU Jia-we, ZHAO Yi-qing, WANG Ben-xin, SUN Hao, WEI Yu-dong, . Mechanical characteristics analysis of granite under unloading conditions [J]. Rock and Soil Mechanics, 2019, 40(S1): 459-467.
[8] HAN Zheng, SU Bin, LI Yan-ge, WANG Wei, WANG Wei-dong, HUANG Jian-ling, CHEN Guang-qi, . Smoothed particle hydrodynamic numerical simulation of debris flow process based on Herschel-Bulkley-Papanastasiou constitutive model [J]. Rock and Soil Mechanics, 2019, 40(S1): 477-485.
[9] WU Mei-su, ZHOU Cheng, WANG Lin, TAN Chang-ming, . Numerical simulation of the influence of roots and fissures on hydraulic and mechanical characteristics of the soil [J]. Rock and Soil Mechanics, 2019, 40(S1): 519-526.
[10] WU Jin-liang, HE Ji, . Composite element model for dynamic excavation simulation of rock slope [J]. Rock and Soil Mechanics, 2019, 40(S1): 535-540.
[11] WU Feng-yuan, FAN Yun-yun, CHEN Jian-ping, LI Jun, . Simulation analysis of dynamic process of debris flow based on different entrainment models [J]. Rock and Soil Mechanics, 2019, 40(8): 3236-3246.
[12] SUN Feng, XUE Shi-feng, PANG Ming-yu, TANG Mei-rong, ZHANG Xiang, LI Chuan, . 3D simulation of fracture growth from perforation to near-wellbore in horizontal wells based on continuum damage model [J]. Rock and Soil Mechanics, 2019, 40(8): 3255-3261.
[13] MU Rui, PU Shao-yun, HUANG Zhi-hong, LI Yong-hui, ZHENG Pei-xin, LIU Yang, LIU Ze, ZHENG Hong-chao, . Determination of ultimate bearing capacity of uplift piles in combined soil and rock masses [J]. Rock and Soil Mechanics, 2019, 40(7): 2825-2837.
[14] JIN Jun-chao, SHE Cheng-xue, SHANG Peng-yang. A nonlinear creep model of rock based on the strain softening index [J]. Rock and Soil Mechanics, 2019, 40(6): 2239-2246.
[15] ZHANG Cong, LIANG Jing-wei, YANG Jun-sheng, CAO Lei, XIE Yi-peng, ZHANG Gui-jin, . Research on the diffusion mechanism and application of pulsate grouting in embankment and dam [J]. Rock and Soil Mechanics, 2019, 40(4): 1507-1514.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] LIU En-long. Breakage mechanics for geomaterials: Breakage mechanism of structural blocks and binary-medium model[J]. , 2010, 31(S1): 13 -22 .
[2] YANG Jian-min, ZHENG Gang. Classification of seepage failures and opinion to formula for check bursting instability in dewatering[J]. , 2009, 30(1): 261 -264 .
[3] HE Si-ming, WU Yong, LI Xin-po. Research on restitution coefficient of rock fall[J]. , 2009, 30(3): 623 -627 .
[4] ZHOU Hua，WANG Guo-jin1,，FU Shao-jun，ZOU Li-chun，CHEN Sheng-hong. Finite element analysis of foundation unloading and relaxation effects of Xiaowan Arch Dam[J]. , 2009, 30(4): 1175 -1180 .
[5] YE Fei, ZHU He-hua, HE Chuan. Back-filled grouts diffusion model and its pressure to segments of shield tunnel[J]. , 2009, 30(5): 1307 -1312 .
[6] LUO Qiang , WANG Zhong-tao , LUAN Mao-tian , YANG Yun-ming , CHEN Pei-zhen. Factors analysis of non-coaxial constitutive model’s application to numerical analysis of foundation bearing capacity[J]. , 2011, 32(S1): 732 -0737 .
[7] GONG Wei-ming, HUANG Ting, DAI Guo-liang. Experimental study of key parameters of high piled foundation for offshore wind turbine[J]. , 2011, 32(S2): 115 -121 .
[8] SONG Yi-min , JIANG Yao-dong , MA Shao-peng , YANG Xiao-bin , ZHAO Tong-bin . Evolution of deformation fields and energy in whole process of rock failure[J]. , 2012, 33(5): 1352 -1356 .
[9] ZHANG Chun-yang，CAO Ping，FAN Xiang，LIN Hang，WAN Lin-hui. Hopper discharge experiment for high viscosity bauxite flow and micromechanics research[J]. , 2012, 33(6): 1653 -1659 .
[10] LU Kun-lin, ZHU Da-yong, YANG Yang. Calculation charts for estimating safety factors of 3D homogeneous slopes[J]. , 2012, 33(S2): 111 -117 .
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