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基于微震监测技术的深井开采地压活动规律研究
STUDY ON RULE OF GEOSTATIC ACTIVITY BASED ON MICROSEISMIC MONITORING TECHNIQUE IN DEEP MINING
【摘要】 简要介绍微震监测技术基本原理及冬瓜山微震监测系统的组成和结构,运用微震监测系统对冬瓜山矿床首采区段不同时段的地压活动集中区进行圈定,采用量化地震学原理开展岩层应力变形强度分布研究,揭示开采诱发地压活动的时空变化规律,初步评价盘区隔离矿柱和回采采场的地压活动状况及稳定性。研究表明,地压活动相对集中区的变化与井下采掘活动紧密相关,各地压活动相对集中区与采掘工程施工位置相对应,在时空上随采掘活动的改变而发生变化。采场回采区内的地压活动相对较稳定,掘进活动区内的地压活动分布较分散且随采掘活动的结束很快减小或消失,目前首采区段岩层是稳定的。实践证明,微震监测技术为深井矿床开采地压活动规律研究提供一种有效技术手段,研究成果为指导矿山安全生产奠定重要的基础。
【Abstract】 By introducing the basic principle of the microseismic monitoring technique and the components and structure of the ISS microseismic monitoring system used in Dongguashan Mine,the relative concentrating area of the geostatic activities is compartmentalized in the first mining area of Dongguashan ore deposit within different periods.The system and the principle of the seismology are adopted to study the intensity distribution of the stress and displacement to discover the temporal and spatial change rules of the geostatic activity produced by the mining and to evaluate the geostatic activity situation and the stability of the insulating pillar and main mining area.The study indicates that the change of the concentrating area of geostatic activity is dependent on the underground mining activities.Every concentrating area is corresponding to the position of each mining project.The geostatic activity changes in time and space with the change of mining project position accordingly.The geostatic activity within the mining area of stope is relatively stable.The distribution of geostatic activity in excavating area is separate and reduces quickly or even disappears with the completion of excavation.The rock mass within the first mining area of Dongguashan ore deposit is stable now.The practice proves that the microseismic monitoring technique is an effective method to study the rule of geostatic activity in deep mining.The result settles an important base for Dongguashan Mine to produce safely.
【Key words】 mining engineering; microseismic monitoring technique; deep mining; metal mine; geostatic activity;
- 【文献出处】 岩石力学与工程学报 ,Chinese Journal of Rock Mechanics and Engineering , 编辑部邮箱 ,2007年04期
- 【分类号】TD326
- 【被引频次】104
- 【下载频次】1226