Study on the surrounding rocks stability of coal-gateway influenced different wide pillars in fully mechanized top-coal caving
Different coal pillar widths result in the differences of stress redistribution and rock seam moving and importantly influence on the stability and maintenance of gateway.According to the geological and mining technical conditions of the No.1151 (3) fully mechanized top-coal caving (FMTC) mining face in Xieqiao Mine and based on the analysis of numerical simulation,the stability of gateway is investigated with different coal pillar widths.The results show that the stress distribution laws and deformation characteristics of gateway surrounding rocks are obvious diversity with different coal pillar widths during caving.And stress distribution of coal pillar and coal entity is displaced with different wide pillars.The deformation and stability of gateway is determined on the stress distribution and its development of coal entity and coal pillar and appropriate width of coal pillar is less than the critical displacing stress-width.These would provide the theoretical basis for the rational setting of the coal pillar width,gateway laying,support parameter selection,stability control of the gateway surrounding rock of the mining gateway and for the safe and economic production etc.
Fully mechanized top-coal caving Coal pillar width Surrounding rocks stability Stress distribution and development Numerical simulation
Xie Guangxiang Yang Ke Chang Jucai Wang Lei
Department of Resource Exploration and Management Engineering,Anhui University of Science and Technology,Huainan 232001
国际会议
The 2007 International Conference on Mine Hazards Prevention and Control(2007矿山灾害预防与控制国际学术会议)
青岛
英文
207-211
2007-10-17（万方平台首次上网日期，不代表论文的发表时间）