CAJ | 학술논문

兴隆磷矿为提高资源回收率，采用两步骤回采法，先矿柱胶结充填，后矿房废石充填。为保障作业的安全，验证胶结矿柱的强度，优化采场结构参数，采用区域的微震监测与局部的点监测相结合的方式，对胶结矿柱及顶板覆岩应力显现进行立体、实时动态监测。通过分析开采过程中获取的应力、应变及位移变化数据，得到了回采工作面前方的采动超前影响距离约为20 m；当矿房回采跨度约36 m时，覆岩累积应力集中较大，顶板局部会有冒落，但采场顶板移动诱发的应力远小于胶结混凝土矿柱强度，胶结矿柱无破坏。结果表明：采用两步骤回采嗣后充填的开采方法及采场结构参数等，能够保证采场稳定。该监测方法能够及时准确地为采场稳定性做出评价，为安全高效生产提供指导。
흥륭린광위제고자원회수솔，채용량보취회채법，선광주효결충전，후광방폐석충전。위보장작업적안전，험증효결광주적강도，우화채장결구삼수，채용구역적미진감측여국부적점감측상결합적방식，대효결광주급정판복암응력현현진행입체、실시동태감측。통과분석개채과정중획취적응력、응변급위이변화수거，득도료회채공작면전방적채동초전영향거리약위20 m；당광방회채과도약36 m시，복암루적응력집중교대，정판국부회유모락，단채장정판이동유발적응력원소우효결혼응토광주강도，효결광주무파배。결과표명：채용량보취회채사후충전적개채방법급채장결구삼수등，능구보증채장은정。해감측방법능구급시준학지위채장은정성주출평개，위안전고효생산제공지도。
In order to improve resource recovery in Xinglong phosphate mine,the two steps of cementing fill of pillar fol-lowing by waste rocks backfilling at stope room are adopted. To ensure safety of operations,verify the strength of cemented pil-lar,and to optimize stope structural parameters,the stereo and dynamic stress of cementing pillar and roof overburden is moni-tored by the combination of micro-seismic monitoring and point monitoring in local. By analyzing the data of stress,strain and displacement in the mining process, the advance distance away from the impact at working face is determined to be 20 m;When mining stope span is about 36 m,the accumulated stress at roof overburden is large,mainly resulting in caving in partial roof. However,stress induced by stope roof movement is much less than the strength of cement concrete pillar,no damage on cementing pillar appeared. The results show that the two-step mining method with subsequent filling and the stope structural pa-rameters can ensure the stability of the stope. The monitoring method can be used to evaluate stope stability timely and accu-rately,and provide guidance for the safe and efficient mining.