Application on Panel Mechanized Small Sublevel Filling Method in Deep Broken Thick Deposit
Aiming at the problems of high risk of roof caving,high filling cost and small production capacity in the upward horizontal filling mining of deep broken thick deposits in Xitieshan Lead-Zinc Mine,a safe and efficient panel mechanized small sublevel filling method was proposed.The structural parameters of the small sublevel stope and the support scheme of the sublevel roadway was simulated and compared by FLAC3D.The results show that the height and the width of small sublevel stope are suggested to be 10 m and 8-10 m,and the resin bolt+steel mesh+shotcrete support scheme can effectively control the deformation of sublevel roadway.Using slag powder and cement clinker with the proportion of 3:1 to replace cement as cementitious material can reduce the filling cost by 15％.The field test shows that the ore blasting effect is the best when the blasting parameter row spacing is 1.4 m and the hole bottom spacing is 1.6-2.0 m,the production capacity of the tested panel reaches 1 000 t/d,and the production efficiency has been increased by 100％.
万方数据
维普
