某矿采场稳定性分析及回采顺序优化研究

发布时间：2018-09-03 18:47

【摘要】：某矿经过多年的开采面临着资源枯竭的问题,安全回收S#320中段#0采场残留资源,对矿山可持续发展具有重要意义。针对该问题,本文通过理论分析、数值模拟等手段对采场稳定性进行分析,并在此基础上对回采顺序进行优化研究。本文研究内容及取得成果如下:(1)收集矿区相关地质资料,了解矿体分布特点、开采现状及生产技术条件,获取矿体、围岩及充填体相关物理力学参数,为后续内容提供依据。(2)运用突变模理论分析水平矿柱在回采过程中的稳定性。应用FLAC3D对矿区开采过程进行模拟,分析该矿区采场现阶段稳定性情况,为回采顺序的优化提供依据。(3)在确保现阶段采场稳定性的基础上,提出8种回采方案,并通过对比分析选出最优方案,得出以下结论:同一中段开采过程中,回采进路的稳定性受相邻采场回采的扰动较大。充填采空区能够有效减少应力集中现象,增加回采进路的稳定性;适当增加开采进路数目,有利于增加采场的稳定性。(4)通过微震对矿山进行监测,得到S#280中段及S#320中段的监测数据;分析微震事件分布图、能量指数-累积视体积与施密特数关系图、位移云图,研究回采过程中采场稳定性情况。
[Abstract]:After many years of mining, a certain mine is faced with the problem of resource depletion. The safe recovery of residual resources in #0 stope in the middle section of S#320 is of great significance to the sustainable development of the mine. Aiming at this problem, the stability of stope is analyzed by means of theoretical analysis and numerical simulation, and on the basis of which, the optimization of mining sequence is studied. The contents and achievements of this paper are as follows: (1) collecting the relevant geological data of the mining area, understanding the distribution characteristics of orebody, mining status and production technical conditions, obtaining the relevant physical and mechanical parameters of orebody, surrounding rock and filling body, (2) using catastrophe model theory to analyze the stability of horizontal pillar in the process of mining. This paper applies FLAC3D to simulate the mining process of the mining area, analyzes the stability of the stope at the present stage of the mining area, and provides the basis for the optimization of the mining sequence. (3) on the basis of ensuring the stability of the stope at the present stage, eight mining schemes are put forward. By comparing and analyzing the optimal scheme, the following conclusions are drawn: in the process of mining in the same middle section, the stability of the mining approach is greatly disturbed by the mining of adjacent stope. Filling goaf can effectively reduce stress concentration phenomenon, increase the stability of stoping access road, increase the number of mining entry roads properly, and increase the stability of stope. (4) Monitoring mines by microearthquakes. The monitoring data of S#280 and S#320 are obtained, the distribution of microseismic events, the relationship between energy exponent-cumulative apparent volume and Schmitt number, the displacement cloud, and the stability of stope during mining are analyzed.
【学位授予单位】：江西理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD80

【参考文献】