湘西金矿深部采场稳定性计算机模拟分析

Computer simulation and analysis of stope stability for deep mining in Xiangxi gold mine

湘西金矿缓倾斜薄矿脉开采深度大， 地质情况复杂，存在一些未能完全解决的技术和理论难题。作者运用ＲＦＰＡ’９８ 数值模拟软件系统， 结合湘西金矿深部开采综合技术研究课题， 计算分析了深部采场的稳定性。计算结果表明： 在断层、裂隙发育的试验采场， 当采场跨度达到６ ｍ 以后， 顶板局部开始垮落；当跨度达到１０ ｍ ｍ 以后， 顶板中部发生冒顶事故。由此提出了相应的采场结构参数、顶板水压支柱支护、地压监测预报等综合地压控制措施。实际应用表明， 这些措施有效地维护了采场的稳定， 使回采作业安全、顺利地完成， 获得了理想的效果。

Utilizing the RFPA'98 software system of numerical simulation, combining the research of mining technology in deep mining of Xiangxi glod mine, the stability of the experiment stope has been calculated and analysed. The results of calculation indicate that a parts of ceiling, where there are some faults and cracks, are about to collapse when the stope span reaches to 6 m; and the middle parts of ceiling starts to collapse when the stope span is 10 m. According to these results, some synthetical measures of pressure control have been proposed, such as optimizing the stope structure dimensions, supporting the ceiling with hydraulic pressure pillars, determining and forecasting the underground pressure. Those measures used maintained effectually the stability of the stope and made mining work finished safely, and the ideal results have been gained.