CAJ | 학술논문

为探讨毛坪铅锌矿所采用的下向分层胶结充填采矿法采场结构参数的合理性，采用数值模拟手段对不同断面尺寸和不同埋藏深度的采场稳定性进行了计算，系统分析了充填体顶板及采场周边应力与塑性区等的变化规律。研究结果表明：随着进路跨度和采深的增加，进路四周拉应力值逐渐增大，当跨度超过5m后，拉应力值已非常接近充填体抗拉强度；而当采深达到560 m时，拉应力范围几乎扩展到整个围岩，说明采场稳定性下降，存在拉破坏可能性。从本次计算情况看，在现有采深时(采深400~450 m)，进路最大跨度不宜超过5 m；而如果维持3．5 m的进路跨度持续向下开采，则适用的最大采深应在600 m左右，否则采场的稳定性难以得到有效保证。
위탐토모평연자광소채용적하향분층효결충전채광법채장결구삼수적합이성，채용수치모의수단대불동단면척촌화불동매장심도적채장은정성진행료계산，계통분석료충전체정판급채장주변응력여소성구등적변화규률。연구결과표명：수착진로과도화채심적증가，진로사주랍응력치축점증대，당과도초과5m후，랍응력치이비상접근충전체항랍강도；이당채심체도560 m시，랍응력범위궤호확전도정개위암，설명채장은정성하강，존재랍파배가능성。종본차계산정황간，재현유채심시(채심400~450 m)，진로최대과도불의초과5 m；이여과유지3．5 m적진로과도지속향하개채，칙괄용적최대채심응재600 m좌우，부칙채장적은정성난이득도유효보증。
In order to discuss the rationality of stope structure parameters of downward drift slicing and cementing fill mining method in Maoping lead-zinc mine,the stope stability at different drift section size and buried depth were calculated by the numerical simulation method,and the change rules of stress and plastic zones of backfill roof and stope surrounding were analyzed systematically. The results show that:with the increasing of drift span and buried depth,the tensile stress at stope sur-rounding rock also increases gradually. When the drift span reaches 5 m,the tensile stress is very close to tensile strength of backfill,and if the mining depth over 560 m,the tensile stress zone almost expands to the whole surrounding rock,which indi-cates that the stope stability has reduced,and the stope is likely to fail. From the calculation results,the maximum drift span should not exceed 5 m at the current mining depth(the depth is 400~450 m),and if we continue to deep mining at 3. 5 m drift span,the biggest mining depth should be less than 600 m. Otherwise,it is hard to ensure the stope stability.