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红岭铅锌矿3中段以上矿房全部采空,遗留大量采空区,危险性非常高,为保证后续回采活动的安全,必须进行采空区群的稳定性分析。首先利用先进数字摄影测量技术,大规模获取岩体结构面参数,从工程岩体地质角度(BQ,RMR)进行岩体稳定性的初步评价;其次建立结构面三维离散裂隙网络模型,从三维数值模拟角度研究围岩的切割破碎程度;再者应用Mathews稳定图方法,从工程经验角度进行上盘围岩稳定性的研究。研究将常规地质方法、数值模拟和工程经验方法相结合,层层递进,多角度准确、全面地获得了复杂采空区群的稳定性分析结果,以及不同岩性围岩所对应的稳定和破坏区域,研究结果对于指导矿山安全回采具有重要意义。
The ore mines above the middle section of Hongling lead-zinc mine are all emptying, leaving a large amount of goaf and the danger is very high. In order to ensure the safety of subsequent mining activities, the stability analysis of gob-gorges must be carried out. First of all, using the advanced digital photogrammetry technology, the parameters of rock mass face are acquired on a large scale, and the rock mass stability is preliminarily evaluated from the geological angle of engineering rock mass (BQ, RMR). Secondly, the three-dimensional discrete fracture network model of structural plane is established, From the perspective of simulation, the degree of cutting and crushing of surrounding rock is studied. In addition, Mathews stability diagram method is used to study the stability of surrounding rock in the upper plate from the engineering experience point of view. The study combines the conventional geologic methods, numerical simulation and engineering experience methods, and progresses in layers to obtain multi-angle accurate and comprehensively the stability analysis results of complex goafs, as well as the stability and Destroy the area, and the research results are of great significance for guiding the mine safety recovery.