基于地压监测的采空区稳定性评估方法研究

Study on evaluation method of goaf stability based on ground pressure monitoring

通过对国内外采空区稳定性地压监测评估方法现状分析,综合考虑微震事件的能量-空间-时间分布特征及多种监测技术手段,提出了微震事件时空演化规律、微震能量指数与累积视体积之比EV、微震b值、多参数融合等4种采空区稳定性评估方法。然后,在普朗铜矿、亚克斯矿、寿王坟矿等矿应用了这些方法,分析这些采空区影响下顶板、地表、巷道围岩破裂发展的发育演变规律,与现场实际相契合,验证了这些方法的有效性。

This paper analyzes the evaluation methods for the stability of goaf ground pressure at home and abroad and comprehensively considers the distribution characteristics of microseismic events in energy-space-time and various monitoring techniques,then it proposes four methods for evaluating goaf stability:Temporal and spatial evolution of microseismic events;ratio of microseismic energy index to cumulative apparent volume EV;microseismic b-value;multi-parameter fusion.After that,these methods were applied in mines such as Pulang Copper Mine,Yakes Mine,Shouwangfen Mine,and other mines to analyze the development and evolution laws of roof,surface,and tunnel surrounding rock fractures,which were consistent with the actual situation on site and verified the effectiveness of these methods.