自动沉落式采矿方法设计及数值模拟分析

Design of automatic sinking mining method and its numerical simulation analysis

为了从根本上提高金矿的开采效率,降低采矿成本和贫化率,争取最短时间内完成富集区金属资源的安全可持续开采,本文首先针对吉尔吉斯斯坦某金矿矿体围岩特征及矿体赋存产状特征,探索出一种"直立破碎矿体自动沉落式采矿方法";然后,提出相应的工艺难点和关键技术;最后,利用有限差分软件(FLAC3D)与离散单元软件(PFC3D),耦合对自动沉落式回采方式条件下支架上部岩体的垮落形态进行了数值模拟分析。通过4次开挖模拟,揭示了自动沉落式回采方式条件下支架上部岩体能自动垮落并充填采空区,避免空顶作业,具有一定的可行性。

In order to improve the efficiency of gold mining,reduce the mining cost and dilution rate,and strive for the safe and sustainable exploitation of the metal resources in the enrichment area in the shortest time,In this paper,firstly,aiming at the characteristics of the surrounding rock of a gold mine in Kyrgyzstan and the characteristics of ore-bearing production,this paper explores a kind of ＂Automatic Setting Mining Method for Upright and Broken Orebody（ASMMUBO）＂.Then,the corresponding technical difficulties and key technologies are put forward.Finally,the finite element software（FLAC3D）and the discrete element software（PFC3D）are used to simulate the collapse of the upper rock mass under the condition of automatic sinking recovery.Through the excavation simulation of four excavations,it is revealed that the rock mass in the upper part of the bracket can automatically collapse and fill the goaf area under the condition of automatic sinking mining,and avoid the empty top operation,which has certain feasibility.