大水金矿采空区群稳定性分析与治理研究  

STABILITY ANALYSIS OF GOAF GROUP AND TREATMENT MEASURES IN DASHUI GOLD MINE

作　　者：徐茂文 刘婧枫 XU Mao-wen;LIU Jing-feng(The Third Institute of Geology and Mineral Exploration,Gansu Provincial Bureau of Geology and Mineral Exploration and Development,Lanzhou 730050,China)

机构地区：[1]甘肃省地矿局第三地勘院,甘肃兰州730050

出　　处：《甘肃地质》2022年第4期78-83,共6页Gansu Geology

摘　　要：针对大水金矿采用浅孔留矿法遗留的急倾斜采空区规模大、形态复杂,安全隐患突出问题,根据三维激光扫描探测结果及现场调查,选取了8个主要空区的结构参数,利用顶板跨厚比法、简支梁模型分析法、Mathews图解法评价了采空区的稳定性,结果显示:8号采空区顶板处于Ⅰ级安全状况(稳定区),3号、5号采空区顶板处于Ⅲ级较不安全状况(支护过渡区),1号、2号、4号、6号、7号采空区顶板处于Ⅳ级危险区状况(崩落区)。分别采用干式充填法、β崩落法及封闭空区的处理方法对所有空区进行治理,有效阻止采空区围岩发生大规模的地压活动,取得较好的治理效果,为矿山持续、安全生产提供保障。In view of the problems of great scale, complicated form and potential safety hazards of steep goaf left by the shallow-hole shrinkage mining method in Dashui Gold Mine, the structural parameters of eight main goafs are selected according to the 3D laser scanning detection results and field investigation. The stability of the goaf is evaluated by using the roof span thickness ratio method, simple supported beam model analysis method and Mathews graphical method. The appropriate goaf treatment scheme is proposed. The implementation of the goaf treatment scheme has achieved good results, ensuring the safety, sustainable and stable production of the mine.

关 键 词：大水金矿 采空区 急倾斜 稳定性 治理 甘肃 

分 类 号：TD853.343[矿业工程—金属矿开采]