| Due to the 17181(1)working face roof cycle weighting interval is too long,it causes the rail haulage roadway face mine pressure appear abnormal.This paper does the following several aspects around the rail transport lane mine pressure appearing problem:①Roof is analyzed the mechanism of the deep hole pre-splitting blasting,and the roof blasting weakening of rail transport roadway surrounding rock loose circle and gob side of roof breakage are analyzed to examine the effects of structure formation,points out that the development of blasting crack and influence on surrounding rock loose circle there is a range;②Weakening on the roof of roadway,the numerical simulation of the mine pressure appear before and after the model is analyzed,after blasting weakening effect,roof periodic weighting interval has been cut,the rail transport roadway to pressure eased severe situation;③For rail transport lane roof weakening of mine pressure appear before and after the monitoring,through the comparison and analysis of field data confirms the blasting and the effectiveness of the proposed scheme to weaken,and put forward the optimization scheme of roadway support. |
PDF Full Text Request