Study on the Influence and Control of Stress Direction Deflection and Partial-Stress Boosting of Main Roadways Surrounding Rock and under the Influence of Multi-Seam Mining

被引:10
作者
Chen, Dongdong [1 ]
Guo, Fangfang [1 ]
Li, Zijian [1 ]
Ma, Xiang [1 ]
Xie, Shengrong [1 ]
Wu, Yiyi [1 ]
Wang, Zhiqiang [1 ]
机构
[1] China Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing 100083, Peoples R China
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
main roadway group; mining-induced stress; surrounding rock stability; ground control; deflection of principal stress; COAL-MINE; FAILURE; PILLAR;
D O I
10.3390/en15218257
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
A large coal pillar (usually more than 90 m) is generally left in place to ensure the stability of main roadway groups, due to its long service lifespan, which commonly also causes a significant loss of coal resources. The design of the width of the protective coal pillar and the control system of the surrounding rock are directly determined by the characteristics of the stress field and the damage mechanism under the influence of the mining activities. However, there are few studies on the effects of the partial-stress boosting and the direction deflection of the stress field on the failure evolution of the surrounding rock (especially in multi-seam mining). In this paper, theoretical analysis and numerical simulation are used to investigate the direction evolution of the maximum principal stress in front of the working face with malposition distances between the upper and lower working faces during the influence of double coal seams mining. Furthermore, a large-scale numerical model is used to study the deviatoric stress evolution of the surrounding rock and the propagation process of the plastic zone in the main roadway group with different widths of protective coal pillars. Then, an asymmetric cooperative anchoring classification method is proposed to strengthen the roadway support, depending on the critical area of the deviatoric stress in the roadway surrounding rock. The peak zone deflection of the deviatoric stress determines the evolution direction of the plastic area, and the peak value of the deviatoric stress presents a typical asymmetric stress boosting on both sides of the roadway. These findings are validated by the on-site ground pressure monitoring results and the practical failure modes of the surrounding rock.
引用
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页数:24
相关论文
共 43 条
[1]  
[Anonymous], 2002, Elasticity
[2]   A review of the geomechanics aspects of a double fatality coal burst at Austar Colliery in NSW, Australia in April 2014 [J].
Bruce, Hebblewhite ;
Jim, Galvin .
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY, 2017, 27 (01) :3-7
[3]  
Cai M, 2013, Rock mechanics and engineering, Vsecond
[4]   Current Status of Hydrogen Production in China [J].
Cao, Junwen ;
Zhang, Wenqiang ;
Li, Yifeng ;
Zhao, Chenhuan ;
Zheng, Yun ;
Yu, Bo .
PROGRESS IN CHEMISTRY, 2021, 33 (12) :2215-2244
[5]   Mining-induced failure characteristics and surrounding rock control of gob-side entry driving adjacent to filling working face in the deep coal mine [J].
Chen, Dongdong ;
Guo, Fangfang ;
Xie, Shengrong ;
Wang, En ;
Wu, Yiyi ;
Jiang, Zaisheng ;
Wang, Long ;
Cui, Junqi ;
Zhang, Xiao ;
Liu, Ruipeng .
ENERGY SCIENCE & ENGINEERING, 2022, 10 (08) :2593-2611
[6]   Reasonable location of stopping line in close-distance underlying coal seam and partition support of large cross-section roadway [J].
Chen, Dongdong ;
Wu, Yiyi ;
Xie, Shengrong ;
Guo, Fangfang ;
He, Fulian ;
Liu, Ruipeng .
INTERNATIONAL JOURNAL OF COAL SCIENCE & TECHNOLOGY, 2022, 9 (01)
[7]   Numerical Simulation of Squeezing Failure in a Coal Mine Roadway due to Mining-Induced Stresses [J].
Gao, Fuqiang ;
Stead, Doug ;
Kang, Hongpu .
ROCK MECHANICS AND ROCK ENGINEERING, 2015, 48 (04) :1635-1645
[8]   Simulation of roof shear failure in coal mine roadways using an innovative UDEC Trigon approach [J].
Gao, Fuqiang ;
Stead, Doug ;
Kang, Hongpu .
COMPUTERS AND GEOTECHNICS, 2014, 61 :33-41
[9]   Discrete element modelling of deformation and damage of a roadway driven along an unstable goaf - A case study [J].
Gao, Fuqiang ;
Stead, Doug ;
Kang, Hongpu ;
Wu, Yongzheng .
INTERNATIONAL JOURNAL OF COAL GEOLOGY, 2014, 127 :100-110
[10]   Optimum Chain Pillar Design at the Deepest Multi-Seam Longwall Workings in India [J].
Ghosh, Nilabjendu ;
Agrawal, Harshit ;
Singh, Satyendra Kumar ;
Banerjee, Gautam .
MINING METALLURGY & EXPLORATION, 2020, 37 (02) :651-664