CAJ | 학술논문

贵州开磷矿业公司用沙坝矿主体为缓倾斜矿体,采用机械化盘区分段充填采矿法开采,通过研究采场跨度与顶板稳定性之间关系确保了作业人员安全和稳定生产.建立合理矿山开采力学模型后,对不同跨度采场在未支护方案下进行数值模拟分析表明,采场整体位移变化基本服从近对称分布;靠近开挖边界处围岩位移最大,距开挖边界越远,围岩位移越小,且移动方向均指向采空区;采场跨度在20m以内,采场顶板不发生破坏;当超过25m以上时,采场顶板出现较大拉应力,顶板开始发生破坏.
귀주개린광업공사용사패광주체위완경사광체,채용궤계화반구분단충전채광법개채,통과연구채장과도여정판은정성지간관계학보료작업인원안전화은정생산.건립합리광산개채역학모형후,대불동과도채장재미지호방안하진행수치모의분석표명,채장정체위이변화기본복종근대칭분포;고근개알변계처위암위이최대,거개알변계월원,위암위이월소,차이동방향균지향채공구;채장과도재20m이내,채장정판불발생파배;당초과25m이상시,채장정판출현교대랍응력,정판개시발생파배.
The ore body of Yongshaba mine in Guizhou Kaiyang Phosphorite Group Company is a gently inclined one.It uses the mechanized sub-fill mining method panel mining.The study of the relationship between stope span and roof stability ensures the safety of operating personnel and stable production.According to the rock mechanical properties,this paper establishes the models with the different stope span under the program without supporting.The numerical simulations show that the stope overall displacement nearly obeys symmetrical distribution;surrounding rock near the excavation boundary has the maximum displacement,and the movement direction points towards gob;Stope roof without supporting can maintain its own stability in the span of 20 m,while the span increases to 25 m,the roof begins to be damaged.