岩质边坡微震监测方案优化设计及隐伏危险区域辨识

Optimization Design of Microseismic Monitoring Scheme for High Steep Rock Slope and Identification of Hidden Danger Zones

地压监测是矿山安全管理的关键环节,也是矿产资源开发过程中有效的监测手段。根据陕西省四方金矿的矿山地质条件和地压活动规律,为提高资源回收率,有效治理矿山地表环形边坡,解决安全绿色采矿的关键问题,针对矿山生产特点,结合传感器布设的基本要求,分析了不同布设方案的理想定位误差,并从经济性角度分析与设计了满足矿山监测要求的地压系统监测方案。为进一步辨识矿山边坡体的薄弱异常区域,确定边坡的区域稳定性情况,采用波速场成像技术获取了边坡体监测剖面低速危险区域和高速危险区域的成像结果,进而实现了边坡体内部隐伏空洞异常区域的超前辨识及监测效果分析。结果表明:在理想化条件下,某一监测点设置为不同的标高时,坡体定位误差差距不明显,结合监测震源的矿山边坡区域相对波速场成像结果可知,基于当前的台网布置方案,可满足对于矿山边坡体监测剖面内部危险区域的辨识需求。研究成果对于减少矿山灾害事故发生、提升矿山安全生产稳定性具有重要意义。

Ground pressure monitoring is a key link in mine safety management and an effective monitoring method in the development of mineral resources.According to the geological conditions and ground pressure activity of Sifang Gold Mine in Shaanxi Province,in order to improve the recovery rate of resources,effectively control the ring slope of the mine surface,and solve the key problems of safe and green mining,the ideal positioning errors of different layout schemes are analyzed according to the characteristics of mine production and the basic requirements of sensor layout.The monitoring scheme of ground pressure system which meets the requirements of mine monitoring is analyzed and designed from the economic point of view.In order to further explore the weak and abnormal areas of the mine slope and determine the regional stability of the slope,this paper uses wave velocity field imaging technology to obtain the imaging results of the low-speed dangerous area and high-speed dangerous area of the slope monitoring profile.Furthermore,the advanced identification and monitoring effect analysis of the hidden cavity abnormal area inside the slope body is realized.The results show that under ideal conditions,when a certain monitoring point is set at different elevations,the difference in volume positioning error is not obvious.Combining with the relative wave velocity field imaging results of the mine slope area where the monitoring source is monitored,based on the current station network lay-out scheme,it can meet the needs for identification of dangerous areas within the mine slope monitoring profile.This research results is of great significance for reducing the occurrence of mining disaster accidents and improving the stability of mine safety and production.