基于声发射监测的岩石水压致裂实验研究及数值模拟分析

采用岩石破坏过程渗流-应力耦合分析软件,考虑岩石岩性、节理裂隙状态、注水孔形状及大小、岩石强度、密度、渗透率及加载方式等影响因素,模拟研究了岩石水压致裂过程中的岩石损伤演化过程及破裂规律.同时结合室内物理实验和水压致裂数值模拟,对两种条件下的模拟实验结果及其应力—应变曲线进行对比分析,揭示了岩石水压致裂过程的裂隙岩体失稳规律,得出深部矿井采动渗水和突水过程中,覆岩裂纹起裂、扩展、渗水、突水,失稳破裂的全过程规律,数值模拟结果和实验结果具有较好的一致性,对矿山防治突水灾害有一定的理论指导意义.

Experimental research and analysis of numerical simulation on rock hydraulic fracture based on the acoustic emission monitoring

Adopted the analysis software of coupled seepage-stress in the rock damage process,and in consideration of effect factors like rock lithology,joint fissures state,shape and size of injection hole,rock strength,density,permeability and loading method,the paper gives the simulation study of the rock damage evolution process and fracture rule in the process of rock hydraulic fracture.In combination with the indoor physical experiment and hydraulic fracture numerical simulation,it gives the contrast analysis on the experimental simulation results and the stress-strain curve under these two conditions,reveals the instability rules of the fractured rock mass during rock hydraulic fracture,and obtains the rules in the whole process of overburden rock cracking up,expansion,water seepage,water gushing,instability fracture.The numerical simulation results and experimental results have good uniformity,and the paper has certain significance of theoretical guidance for the disaster of the mine water gushing.