基于区域性微震活动的深部采场稳定性分析

doi:10.11872/j.issn.1005-2518.2018.03.325

Abstract

Abstract: Hongtoushan copper mine is one of the metal mine with largest mining depth in China，and the problem of ground pressure is prominent.In order to analyze the stability of deep stope and prevent the failure of surrounding rock，a high precision Zhongke microseismic monitoring system has been established in No.47 stope of -707 mining level in Hongtoushan copper mine.The positioning accuracy of the system can meet the requirements of mine production with multi-mined areas through artificial blasting test.The real-time monitoring results show that the stress of surrounding rock of No.47 stope is adjusted quickly，no obvious increase of microseismic activities after large blasting，and there is a positive correlation between field operations such as second blasting and ore extraction activities and microseismic activities.During the mining process，the microseismic active zone is mainly located near No.3502 tunnel，the ore outlet，-707 main roadway and the stope near the ventilation shaft 2.It is found that the first three areas exist significant dynamic failures by on-site reconnaissance，which matched the monitoring results.The stability analysis of surrounding rock based on regional division is helpful to explore the relationship between microseismic activities and large blasting，second blasting and ore extraction activities，and analyze the dominant factors of surrounding rock failure.

Key words: deep stope, microseismic activity, stability, regional, dynamic failure, rock burst, monitoring system

CLC Number:

TD325

WU Hao, CHEN Bingrui, CHI Xiuwen, WANG Bo, XU Shida, JIANG Hongbo. Stability Analysis of Deep Stope Based on Regional Microseismic Activity[J].Gold Science and Technology, 2018, 26(3): 325-333.

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Stability Analysis of Deep Stope Based on Regional Microseismic Activity

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