CAJ | 학술논문

以云南磷化集团晋宁磷矿6号坑口东采区+2150 m水平缓倾斜中厚磷矿床为研究对象,通过矿山压力平面应力相似模拟试验台,进行了房柱采矿法下矿柱稳定性及采场结构参数优化的相似模拟试验。基于试验结果,研究了沿矿体走向推进过程中采场顶板围岩与矿柱的应力、变形破断规律,同时对采场矿柱宏观失稳破坏模式和失稳机理进行了探讨分析,并对房柱法开采下采场结构参数进行了优化。结果表明：房柱法开采下采场围岩的变形破断具有明显的3个阶段特征,按照变形破坏程度,房柱法开采后,采场覆岩划分为垮落带、裂隙贯通带以及微裂隙松动带；矿体开挖结束后,对采场的个别矿柱进行回收,回采结束后矿柱会突然发生整体大规模的垮塌失稳破坏,呈现出明显的“多米诺骨牌效应”；同时建议采用矿房10 m,矿柱8 m的采场结构参数,以保证采矿安全。研究结果可为该采区深部矿体或类似条件的矿山开采提供理论和技术上的指导和建议。
이운남린화집단진저린광6호갱구동채구+2150 m수평완경사중후린광상위연구대상,통과광산압력평면응력상사모의시험태,진행료방주채광법하광주은정성급채장결구삼수우화적상사모의시험。기우시험결과,연구료연광체주향추진과정중채장정판위암여광주적응력、변형파단규률,동시대채장광주굉관실은파배모식화실은궤리진행료탐토분석,병대방주법개채하채장결구삼수진행료우화。결과표명：방주법개채하채장위암적변형파단구유명현적3개계단특정,안조변형파배정도,방주법개채후,채장복암화분위과락대、렬극관통대이급미렬극송동대；광체개알결속후,대채장적개별광주진행회수,회채결속후광주회돌연발생정체대규모적과탑실은파배,정현출명현적“다미낙골패효응”；동시건의채용광방10 m,광주8 m적채장결구삼수,이보증채광안전。연구결과가위해채구심부광체혹유사조건적광산개채제공이론화기술상적지도화건의。
Based on the gently inclined medium thick phosphate deposit at the east mining section of +2 150 m level of Jinning No. 6 mine under Yunnan phosphate Co. ,Ltd. ,the similar simulation experiment of the stability of stopes pillars under room and pillar mining was carried out by the similarity simulation of mine pressure plane stress modeling. Based on the experi-mental results,the stress changing law of the above roof of stope pillar during the mining along the strike direction of phosphate were investigated. The macroscopic instability and failure model and instability mechanism were also studied. Then,the stope structural parameters under the room and pillar mining method are optimized. The experimental results showed:The deformation and breaking features of stope wall rock under room and pillar mining method has obvious three phase characteristics. The over-burden rocks are divided into caving belt,fissure zone,micro cracks loose belt according to the deformation level. After the ore body excavation finished,individual pillars are recovered. After that,the whole instability and large-scale failure of mining pillar may suddenly occur,called obviously domino effect phenomenon. At the same time,the stope structural parameters of 10 m room and 8 m pillar are recommended so as to ensure the mining safety. The relevant research can provide theoretical and tech-nical guidance for the underground mining of the deep ore body or similar mines.