CAJ | 학술논문

三山岛金矿是中国第一个滨海开采的大型蚀变岩型金矿床,其直属矿区水文地质条件复杂.三山岛金矿直属矿区一直沿用点柱式上向水平分层充填采矿法开采,该采矿法开采时预留了采场间柱、采场顶底柱、采场矿石点柱、上盘护顶矿等,由此造成的分层损失超过13%,总损失率高达23.1%,为解决三山岛金矿直属矿区矿体安全回采的技术难题,需研究取消矿柱的合理位置.通过不同开采深度的分界高度模拟,进行了不同分界深度地表沉降、等效应力对比、弹塑性应变对比、采场竖向变形分析.研究结果显示,当开采深度小于2400 m 时,分界高度取-510 m 比较适宜.
삼산도금광시중국제일개빈해개채적대형식변암형금광상,기직속광구수문지질조건복잡.삼산도금광직속광구일직연용점주식상향수평분층충전채광법개채,해채광법개채시예류료채장간주、채장정저주、채장광석점주、상반호정광등,유차조성적분층손실초과13%,총손실솔고체23.1%,위해결삼산도금광직속광구광체안전회채적기술난제,수연구취소광주적합리위치.통과불동개채심도적분계고도모의,진행료불동분계심도지표침강、등효응력대비、탄소성응변대비、채장수향변형분석.연구결과현시,당개채심도소우2400 m 시,분계고도취-510 m 비교괄의.
Sanshandao gold mine of Shandong Gold Mining (Laizhou) Co.,Ltd.is China's first large altered rock type coastal gold deposit,where the hydrogeological conditions in the mining area are complex .Sanshandao gold mine has been using the upward horizontal slice stoping and backfilling method with random pillars .With this method,barri-er pillars,sill and crown pillars,random stope pillars,and hangingwall support pillars are left ,as a result of which the loss of ore in slice stoping exceeds 13 % and the total loss is as high as 23.1 %.To solve the technical problems of safe stoping in direct mining area of Sanshandao gold mine ,the proper locations to omit pillars are discussed .Through the simulation of boundary depth for omitting pillars in different mining depth ,surface subsidence,comparison of e-quivalent strength,elastoplasticity and vertical deformation of the stope and so on are analyzed .The results show that the boundary depth should be -510m when the mining depth is less than 2 400 m.