Abstract:
For the problems of difficult control of gob-side entry driving surrounding rock at deep island coal face, we took 7433 island coal face as the engineering background and carried out a research to get the reasonable coal pillar size and support parameter of gob-side entry driving by means of theoretical analysis, numerical simulation and field measurement. And results show that the best location of the gob-side entry driving is the internal stress field. When it sized 7 m, the pillar will get the best bearing capacity and the minimum amount surrounding rock deformation. Based on these, we designed the support parameter, which obtained an effective control during both the roadway mining and driving.