JOURNALS/BOOKS
Numerical simulation of surrounding rock stress with different coal seam thicknesses 29-38 F. Q. Cheng, Z. K. Ping

Energy Education Science and Technology Part A: Energy Science and Research
2016 Volume (issue) 34(1):29-38

 

 

 

 

Numerical simulation of surrounding rock
stress with different coal seam thicknesses

 

Fang Qian Cheng1,2,*, Zhou Ke Ping1

 

1Central South University, School of Resources and Safety Engineering, Changsha, Hunan 410083, China

2Huanghuai University, Institute of Architecture and Engineering, Henan Zhumadian 463000, China

 

 

 

 

 

 

Received: 30 November 2015; accepted: 12 January 2016

Abstract

 

    Take Kangjiatan coal mine as an example.Both the theoretic model and the numerical simulation have been established in this paper to analyze the stress distributing regularity about the surrounding rock of stope face in different thicknesses of coal seam by using discrete element method. With the increase of the coal seam thickness, the results indicate that pressure phenomenon and destruction degree of the roof have become clearer and the size of stress concentration region has enlarged on both ends of working face, whereas the peak in those areas has decreased. In the pressure relief region which is on the top of working face, the size has enlarged a lot due to the increase of the coal seam thickness. Besides, in stress concentration region on both ends of working face, the peak has shifted to the front of working face with the increase of the coal seam thickness.

 

Keywords: Stope face; Coal seam thickness; Surrounding rock stress