采准巷道是否稳定关系到回采作业能否正常进行，对于无底柱分段崩落采矿法而言，凿岩进路的稳定更是如此。以镇沅金矿松软破碎矿体开采为工程背景，运用Flac 3D数值模拟软件模拟卸压硐室的卸压效果，通过对比分析应力场、位移场以及剪切应变增量等指标，确定了硐室卸压方案。卸压开采模拟研究及应用表明，模拟研究为维护采准巷道（凿岩进路）的稳定性提供了可靠的理论依据，采取的硐室卸压方案工程实施卸压效果明显。
@@@@The stability of preparatory workings is important for mining especially for sublevel caving without sill pillars.This paper takes soft and cracked ore body in Zhenyuan gold mine for engineering background ,and adopts the Flac 3D software to simulate the effect of pressure-relief in chambers.The pressure-relief scheme is proved reasonable through analyzing the field of surrounding rock stress ,the displacement variation,and the shear strain increment .The study shows that the pressure-relief chamber scheme is effective in relieving pressure ,and provides reliable evidence for maintaining the stability of preparatory workings .
参考文献
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