Numerical Simulation on Optimization of Mining Scheme for Deep, Sharply Inclined−thin Ore Bodies at the Asher Copper Mine
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摘要:
为了解决深部急倾斜薄矿体回采方案优化难题，以新疆哈巴河阿舍勒铜矿50m中段和00m中段13线以北急倾斜薄矿体为研究对象，通过工程地质调查，设计了回采方案，并利用数值模拟软件建立了数值模型，对回采过程中位移演化、应力分布以及塑性区分布规律进行了研究。结果表明：本次数值模拟一次性回采3 m、4 m、5 m的3种方案所形成的位移演化、应力分布和塑性区分布规律大致相同，对矿山回采工作影响较小。综合考虑阿舍勒铜矿的生产工时以及经济成本，本次选定了一次性回采5 m矿体作为阿舍勒铜矿急倾斜薄矿体的回采方案。研究为本矿及同类矿山矿体回采提供了理论依据。
Abstract:In order to study the difficulty of mining the deep sharply inclined−thin ore body, the sharply inclined thin ore body north of the 13th line of the 50 m middle section and 00 m middle section of the Habaha Ashele Copper Mine in Xinjiang was taken as the research object. The engineering geology was investigated, the mining scheme was designed, numerical simulation software was utilized, numerical models were developed, and finally the displacement evolution, stress distribution and plastic zone distribution patterns during the mining process were investigated. Optimization of the sharply inclined thin ore body mining plan for the Asher copper mine was elaborated. The results showed that this numerical simulation of one time mining 3 m, 4 m, 5 m of the three scenarios formed by the displacement evolution, stress distribution and plastic zone distribution law was more or less the same. The law did not have much influence on the mining work. The production man hours and the economic costs of the Ashele Copper Mine were taken into account, the option of mining the 5 m ore body in one go was selected as the option for mining the sharply inclined thin ore body at the Ashele Copper Mine.
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表 1 本次数值模拟模型主要岩组岩体力学参数
Table 1. Mechanical parameters of the main rock groups in this numerical simulation model
岩性 抗拉强
度/MPa抗压强
度/MPa弹性模
量/GPa黏结力
/MPa内摩擦
角/（°）容重
/(kN·m−3)泊松比 凝灰岩 0.07 2.70 11.46 3.01 31.26 27.41 0.25 铜硫矿 0.30 12.35 22.45 7.18 40.40 44.66 0.32 黄铁矿 0.24 9.50 15.78 6.09 38.59 37.22 0.26 
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表 2 设计回采结构参数
Table 2. Design mining structure parameters
一步骤回采/m 二步骤回采/m 三步骤回采/m 四步骤回采/m 3 3 3 3 4 4 4 4 5 5 5 5
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