关键词: 绿色开采, 帷幕注浆, 联合防治水措施, 嗣后充填法, 大倾角皮带

Abstract: Aiming at the complex mining conditions of heavy water inflow underground,subsidence of village and farmland not allowed,and saturated tailing pond in Wuzhuang Iron Mine,the theory and the related technological measures of green mining for the mine are proposed as follows.Adopting the water prevention and control program of “inner plugging and outer discharging with curtain grouting as main in surface and underground”,that is,stopping indirect water supply from surface to underground by irrigation channel cementing and anchoring.In this process,curtain grouting plugs the water-rich faults to cut off water from surface,at the same time the water-blocked wall at underground is built to prevent from the grouting liquid gushing and washing away from water gushing point.Taking the sublevel open-stoping method with subsequent backfill.Tailing cementing material are timely filled into the mined-out area to ensure the stability of goaf roof and grouting curtain and to prevent surface subsidence.Building the backfill station on surface for two kinds of feeding method.Dry materials from tailing pond are transported to the backfill station by truck and conveyed into sand bunker by large inclined angle belt conveyor,while the tailings from concentration plant are pumped by pipeline directly.After this program put into practice,underground water inflow decreased from 1 260 m3/h to 300 m3/h,lower by 76%,and also the drainage costs are saved and underground resources are protected.The backfill mining method avoids from surface subsidence,decreases land requisition and village relocation,and raises the mining recovery from 67% to 89%.Also,with tailings as backfill materials,the tailing stacking problem is solved.

Key words: Green mining, Curtain grouting, Water prevention and control measure, Backfill mining method, Large inclined angle belt conveyor