矿山注浆帷幕渗水通道形成过程

摘要 根据张马屯铁矿注浆帷幕漏水实例及排水试验结果，通过帷幕及其周围岩体破裂诱发的微震活动研究了渗水通道的形成过程.结果表明:渗水通道的发展主要受采矿活动与帷幕间距离的影响，采矿活动周期性接近与远离帷幕引起帷幕及其周围岩体受力状态的阶段性变化导致渗水通道上微震活动呈现出交替的活跃与沉寂.渗水通道的形成、发展伴随着大量微震活动，利用微震监测方法可分析渗水通道的形成过程及形成原因，确定潜在渗水通道的空间位置，所以微震监测方法是一种极具发展前景的注浆帷幕稳定性监测方法.
Abstract：According to the curtain leakage phenomenon and the drainage test results in Zhangmatun iron deposit grout curtain， the seepage channel formation process was studied through the microseismic activities induced by the collapse of the curtain and its surrounding rock masses. Results showed that the formation of seepage channel is mainly affected by the distance between mining activities and the grout curtain. The periodically mining activities， close or away from the grout curtain， lead to periodical stress changing in the curtain and the surrounding rock masses， thus resulting in the periodical activation of microseismic activities surrounding the curtain. Because the formation of water seepage channel and its development are accompanied by a large number of microseismic events， the location of the seepage channel， its formation process and related mechanism can be well determined and understood by microseismic monitoring technique， which is a promising method for the stability assessment of the grouting curtain.