Multi-factors analysis of the stability of roadway under coal pillar based on response surface method
Based on the experimental design and data analysis of response surface method, the defor-mation characteristics of surrounding rocks under coal pillars of different horizontal distance, vertical distance, mining depth, size of coal pillars, strength of surrounding rocks and strength of roadway sup-port were obtained through stimulation with finite difference software, and the influence of interaction between single-factor and multi-factor on stability of surrounding rocks in the pillar roadway and its in-ternal causes were analyzed. The result has indicated that the influence of various factors on roadway deformation is subject to the distribution features of the principal stress difference under coal pillar; the influence of uncontrollable factors (i.e. strength of surrounding rocks, size of coal pillars, mining depth and vertical distance ) on the surrounding rocks deformation can be minimized through the adjustment of controllable factors (i.e. horizontal distance and roadway support strength). Based on the above re-search results, the practical roadway is arranged according to the principal stress difference changes, "high pretension and intensive support" and "differentiation support" are taken as the principle for sup-port in the roadway, and the in-situ monitoring of mine pressure shows the roadway stability is controlled quite well.
国家科技期刊平台
NSTL
万方数据
维普
