以大尹格庄金矿－616 m水平8204采场为工程依托，对采场进行稳定性分析及结构参数优化。为此，对8204采场进行工程地质调查、矿岩力学性质试验，并应用Q系统和RMR分级法对采场岩体质量进行评价。基于Mathews稳定性图表法、临界跨度图表法和数值模拟，对采场尺寸和最大跨度进行优化。分析认为，8204采场的最佳跨度为12 m，并将其结果应用于现场。结果表明，采用采场暴露面尺寸为12 m ×100 m的结构参数进行回采，采场顶板及围岩并未发生垮落及剥落现象，采场稳定性良好。
The stability analysis and parameter optimization were carried out in No.8204 stope at the -616 m level of Dayingezhuang Gold Mine.By means of the engineering geologic investigation and rock mechanics experiments in No.8204 stope,and the application of Q system and RMR classification,rock mass quality is assessed.Based on Mathews stability graph,the critical span design method and numerical simulation,the stope scale and maximum span were optimized.Analysis takes that the optimal span should be 12 m in No.8204 stope,and the result is applied in the stope.The results show that the caving and spalling of the roof or sidewalls do not occurred when the exposed surface is 12 m ×100 m,and the stope stability is guaranteed.
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