摘要
金川龙首矿西二采区为贫矿资源区,最初设计采用下向分层胶结充填法开采,但在生产后期由于开采成本的原因,将上部中段改用无底柱分段崩落法开采,从而在采区内形成了上部中段崩落法与下部中段充填法同时进行采矿作业的复杂局面。由于崩落法的地压活动规律及分布特点与充填法存在较大差异,为确保整个西二采区的稳定性,建立了立体包裹式微地震监测台网,对上、下中段的采场实现全面监测,同时自主研发了微地震安全监测平台,实现了微震信号的自动识别与分类、微震事件高精度定位及自动预警等功能。利用所建立的微地震系统对西二采区的整体稳定性进行实时动态监测。微地震监测结果表明,在两种采矿方法协同开采过程中,上部崩落法采场回采进路处于稳定状态,采场顶板胶结充填体发生冒落形成覆盖层,下部中段胶结充填法采场整体处于稳定状态。
The West No.2mining area of Longshou Mine in Jinchuan is a lean mineral resource area.The mine was originally designed as a downward layered cemented filling method for mining,but in the later stage of production,due to mining cost reasons,the mining of upper section was changed from filling method to sublevel caving method.As a result,a complex situation of simultaneous mining operations between the caving method in the upper section and filling method in the the lower section occurred in the mining area.Due to the significant differences in the activity and distribution characteristics of ground pressure between the caving method and the filling method,in order to ensure the stability of the entire West No.2mining area,a three-dimensional wrapped microseismic monitoring network was established to achieve comprehensive monitoring coverage for the upper and lower sections of the mining area.At the same time,a user-friendly microseismic safety monitoring platform was independently developed,achieving functions such as automatic identification and classification,high-precision positioning,and automatic warning of microseismic signals.Real-time dynamic monitoring was conducted on the overall stability of the West No.2mining area using the established microseismic system.The monitoring results show that during the collaborative mining process of the two mining methods,for the upper section mined by caving method,the mining drift in stope is in a stable state,and the cemented filling body on the roof of the mining area collapses and forms a covering layer,and for the lower section mined by filling method,the stope has a overall stable state.
作者
李宏业
武拴军
王永定
龙卫国
龚臻
谭宝会
杨宁
贾凯跃
LI Hongye;WU Shuanjun;WANG Yongding;LONG Weiguo;GONG Zhen;TAN Baohui;YANG Ning;JIA Kaiyue(Mining Engineering Branch of Jinchuan Group Engineering Construction Co.,Ltd.,Jinchang,Gansu 737100,China;Longshou Mine,Jinchuan Group Co.,Ltd.,Jinchang,Gansu 737100,China;School of Environment and Resources,Southwest University of Science and Technology,Mianyang,Sichuan 621010,China)
出处
《矿业研究与开发》
CAS
北大核心
2024年第6期228-233,共6页
Mining Research and Development
基金
镍钴资源综合利用国家重点实验室开放课题(GZSYS-KY-2021-022)。
关键词
微地震监测
协同开采
崩落法
充填法
采场稳定性
Microseismic monitoring
Collaborative mining
Caving method
Backfill mining method
Stope stability
