微震技术在采空区地表变形监测中的应用

APPLICATION OF MICROSEISMIC TECHNOLOGY FOR GROUND DEFORMATION MONITORING OF MINED-OUT AREA

采空塌陷势必会引起地表建筑物基础的变形以及建筑物上部结构的裂损,同时还会严重影响地表道路及各种管线的安全,需要引起高度重视。由于采空塌陷是一个复杂而漫长的过程,目前多以地表变形监测为主,注重塌陷结果的监测,预警预报能力较差。因此,注重引发塌陷的岩土力学变化,进行应力变化监测是塌陷监测的根本方法。以“矿山地质环境监测修复技术研究及示范”项目为例,对IMS微震监测系统在京西采空塌陷区地表变形监测中的应用进行介绍。通过对系统建设、运行和结果分析对比,可为采空塌陷区地面变形监测提供借鉴。

The collapse of mined-out area will inevitably lead to the deformation of the foundation of surface buildings and the cracking of the superstructure of buildings,and at the same time,it will seriously affect the safety of surface roads and various pipelines,which needs great attention.Its formation is a complex and lengthy process.The study on mining subsidence has been focused on the surface deformation monitoring-collapse results,but achieved poorly in early warning ability.In order to improve this situation,the monitor service should be turned to the change of rock and soil mechanics and stress monitoring should be confirmed as a basic solution.The paper,with the help of the projectresearch and demonstration of mine geological environment monitoring and repair technology,discusses the application of micro-seismic monitoring system(IMS) in west coal mine collapse in Beijing.The comparison,system construction and operation with result analysis in it,provides ideas and reference for the monitoring of mining subsidences.