The control of large deformation in soft rock roadway is a major challenge facing coal mine safety production.In order to improve the stability of the roadway and ensure the safety of coal mining operations,taking the 21305 roadway of Zhangjiawan Coal Industry Co.,Ltd.in Shanxi Province as an example,the characteristics of large deformation of the roadway were preliminarily explored.A reasonable numerical calculation method for steel tube concrete support was adopted,and an improved combination support scheme of"anchor cable+grid+sprayed concrete+steel tube concrete"was proposed.The control effect of the improved combination support scheme on large deformation of soft rock roadway was evaluated.The results indicate that the inclined wall of the inclined wall arch steel tube concrete support is prone to damage,and the improved combined support system has a significant effect on controlling large deformation in soft rock roadways.
关键词
巷道/围岩变形/巷道支护/组合支护方案
Key words
roadway/surrounding rock deformation/roadway supporting/combination support scheme
维普
万方数据