中国钨业
中國鎢業
중국오업
CHINA TUNGSTEN INDUSTRY
2013年
5期
16-19
,共4页
罗福龙%罗福友%刘荣军%李坊洲%胡龙飞
囉福龍%囉福友%劉榮軍%李坊洲%鬍龍飛
라복룡%라복우%류영군%리방주%호룡비
中深孔分段崩落法%回采优化%矿柱%破碎带
中深孔分段崩落法%迴採優化%礦柱%破碎帶
중심공분단붕락법%회채우화%광주%파쇄대
mid-deep hole sub-level caving mining method%mining method optimization%pillar%broken belt
九西矿区矿体开采受到产状和胶结程度差的上盘破碎带的影响，破碎带垮塌堵塞中深孔分段崩落法采场爆破通道和爆破补偿空间，造成无法放炮崩矿，且二次贫化严重。为解决这一问题，选择720中段已有采准、切割工程的10线E采场进行回采优化试验。优化设计仍用中深孔分段崩落法，利用原凿岩平巷和扇形孔。考虑到原切割槽与采空区贯穿，难以避开破碎带，为防止破碎带再次影响回采，暂留3.6 m宽间柱将原切割槽内的废石隔离；在矿体南帮预留2m宽矿柱隔离破碎带，防止破碎带坍塌；在顶板预留4m厚顶柱隔离原全面法采空区，即所谓“三面合围”法，用矿柱将采场上、西、南进行隔离。实践证明，“三面合围”法预留矿柱，起到了隔离破碎带（或采空区）的作用，回收了矿产资源，降低了矿石贫化率和损失率。
九西礦區礦體開採受到產狀和膠結程度差的上盤破碎帶的影響，破碎帶垮塌堵塞中深孔分段崩落法採場爆破通道和爆破補償空間，造成無法放砲崩礦，且二次貧化嚴重。為解決這一問題，選擇720中段已有採準、切割工程的10線E採場進行迴採優化試驗。優化設計仍用中深孔分段崩落法，利用原鑿巖平巷和扇形孔。攷慮到原切割槽與採空區貫穿，難以避開破碎帶，為防止破碎帶再次影響迴採，暫留3.6 m寬間柱將原切割槽內的廢石隔離；在礦體南幫預留2m寬礦柱隔離破碎帶，防止破碎帶坍塌；在頂闆預留4m厚頂柱隔離原全麵法採空區，即所謂“三麵閤圍”法，用礦柱將採場上、西、南進行隔離。實踐證明，“三麵閤圍”法預留礦柱，起到瞭隔離破碎帶（或採空區）的作用，迴收瞭礦產資源，降低瞭礦石貧化率和損失率。
구서광구광체개채수도산상화효결정도차적상반파쇄대적영향，파쇄대과탑도새중심공분단붕락법채장폭파통도화폭파보상공간，조성무법방포붕광，차이차빈화엄중。위해결저일문제，선택720중단이유채준、절할공정적10선E채장진행회채우화시험。우화설계잉용중심공분단붕락법，이용원착암평항화선형공。고필도원절할조여채공구관천，난이피개파쇄대，위방지파쇄대재차영향회채，잠류3.6 m관간주장원절할조내적폐석격리；재광체남방예류2m관광주격리파쇄대，방지파쇄대담탑；재정판예류4m후정주격리원전면법채공구，즉소위“삼면합위”법，용광주장채장상、서、남진행격리。실천증명，“삼면합위”법예류광주，기도료격리파쇄대（혹채공구）적작용，회수료광산자원，강저료광석빈화솔화손실솔。
In Jiuxi mine area, orebody mining impact of the occurrence and poor cementation of fracture zone on the plate. After broken belt collapsed, it plugging blasting channel and blasting space, causing many serious phenomena, for example, not caving, and secondary dilution serious in middle deep hole sublevel caving mining stope. To solve this problem, select the 720 m level 10 line E stope as a design changes and mining tests stope. On the basis of the existing mining engineering change deep hole sublevel caving stope. Optimal design is still used mid-deep hole sublevel caving mining method, and using the original fan-shaped hole drilling and drifting. Taking into account the original slots and gob cutting through, it is difficult to avoid the broken belt. To prevent broken belt again affect recovery, persistence 3.6 m wide column isolation between the original cut tank waste rock. South of the orebody persistence 2 m wide pillar isolated fracture zone to prevent the fragmentation zone collapse. Places to stay in the top plate 4 m thick crown pillar isolation original comprehensive law gob. "Encircled on three sides" method, is use pillar to isolate the stope's top, west and south. Practice has proved that "encircled on three sides" aside pillar approach has played a role in fracture zone (or goaf) isolation, and recovery of mineral resources, reduce ore dilution and loss rates.
