露天矿过断层开采方式及生产能力接续分析

在露天开采过程中遇到断层时,由于煤层突然错位,造成剥采比剧变,工程接续困难。因此,过断层期间剥采比合理控制和矿山工程平稳过渡接续是露天开采的技术难题之一。笔者通过建立剥采比与断层落差、产状及煤层厚度数学模型,研究不同煤柱留设宽度对边坡稳定的影响;分析了矿山工程发展速度与同时采煤台阶数的关系,计算确定了过断层期间确保矿山工程平稳过渡接续的动态降深速度和生产能力接续方式。结合胜利东二号露天矿过F61断层进行实例研究。结果表明:过断层开采方式和生产能力接续方法可有效均衡生产剥采比,保证产量稳定,提高矿山经济效益。

Analysis on mining method and production capacity succession during surface mining through fault

Coal seam appears dislocated when mining encounters a fault, and stripping ratio will drastically change, then mining engineering is difficult to be continued. In order to maintain the stability of stripping and mining, mine engineering transition succession and stripping ratio should be controlled when mining through faults. Mathematic models of mining stripping ratio and coal seam thickness, fault angle and fault throw are built to analyze the impact of different unexploited coal pillar widths on slope stability. The relationship between the pace of development and simultaneous coal mining beach is analyzed and the dynamic drawdown speed is determined to ensure a smooth transition succession in mining engineering. Combing with the surface mine problems that occur in fault area, this paper takes Shengli East No.2 Surface Mine mining through F61 fault as a case study. The results show that the stripping ratio is balanced and the production keeps stability, moreover, the economic benefit is improved with the method of mining through faults and production capacity succession.