基于微震参数的岩体损伤过程数值模拟分析  

Numerical simulation of rock damage process based on microseismic parameters

作　　者：赵永[1] 杨天鸿[1] 张鹏海[1] 周靖人[1] 于庆磊[1] 

机构地区：[1]东北大学深部金属矿山安全开采教育部重点实验室,资源与土木工程学院,辽宁沈阳110819

出　　处：《采矿与安全工程学报》2018年第1期213-220,共8页Journal of Mining & Safety Engineering

基　　金：国家重点基础研究发展计划项目(2013cB227902);国家自然科学基金项目(51574059,51574060)

摘　　要：为了研究微震监测与岩体损伤之间的关系,本文以石人沟铁矿为工程依托对15-16#勘探线之间的微震事件进行处理,对其时空分布规律进行了研究。初步分析了该区域岩体损伤破坏规律。除此之外,对如何利用微震监测结果研究岩体损伤情况做了如下研究:通过选取岩体实际破坏区域进行计算,确定出地震效率值;通过对考虑损伤的各向同性可释放应变能的研究,利用微震事件能量与该能量的关系建立岩体损伤模型;利用FISH语言将微震监测结果嵌入数值模拟中,利用震源参数确定出微震事件所影响的岩体单元并对其力学参数进行修正,从而达到分析岩体损伤过程的目的。通过对微震活动、岩体损伤程度、塑性区变化等结果分析,对岩体不稳定区域进行了圈定,并提出了相应的防治措施。In order to study the relationship between microseismic monitoring and damage of rock mass, the microseismic events in 15-16# exploration line are analyzed. Based on the project of Shiren- gou Iron Mine. The damage and failure law of rock mass in this area is preliminarily analyzed based on the analysis of the temporal and spatial distribution of microseismic events. In addition, the following works have been done aiming at how to use the results of microseismic monitoring to study the rock mass damage： The seismic efficiency value is determined by calculating the actual damage area of rock mass; Based on the study of the isotropic releasable strain energy, the damage model of rock mass is es- tablished by the relationship between the source parameters and the releasable strain energy. The micro- seismic monitoring results are embedded in the numerical simulation by using the FISH language. Us- ing source parameters to determine elements of rock mass, which are influenced by microseismic events and its mechanical parameters are modified. So as to quantitatively analyzed the damage process of rock mass. By analyzing the degree of rock damage, microseismic activity and the change of plastic zone, the unstable areas are delineated, and the prevention and control measures are put forward.

关 键 词：损伤模型 微震监测 数值模拟 岩体稳定性 

分 类 号：TD324[矿业工程—矿井建设]