In order to solve the problems of severe mining pressure during the final mining of fully mechanized mining face in Jinjie Coal Mine. large deformation of surrounding rock in the withdrawal channel and difficult to control. based on the background of 31115 working face mining in Jinjie Coal Mine. a combination of theoretical analysis and numerical calculation was used to study the ove... https://www.jmannino.com/hot-offer-Card-50-Number-Pink-Khaki-Stripe-special-buy/