基于光纤与微震监测系统的注浆帷幕“浆-岩”组合体采动效应研究——以滇东北毛坪铅锌矿为例  

Mining effects of grouted-rock composite of grout curtains based on optical fiber and microseismic monitoring systems:A case study of the Maoping lead-zinc mine in Northeast Yunnan,China

作　　者：袁世冲 张改玲[4] 孙帮涛 韩贵雷 王志修 YUAN Shichong;ZHANG Gailing;SUN Bangtao;HAN Guilei;WANG Zhixiu(School of Urban Geology and Engineering,Hebei GEO University,Shijiazhuang,Hebei 050031,China;Key Laboratory of Intelligent Detection and Equipment for Underground Space of Beijing-Tianjin-Hebei Urban Agglomeration,Shijiazhuang,Hebei 05003l,China;Hebei Technology Innovation Center for Intelligent Development and Control of Underground Built Environment,Shijiazhuang,Hebei 05003l,China;School of Resources and Geosciences,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;Yiliang Chihong Mining Co.,Ltd.,Zhaotong,Yunnan 657602,China;North China Engineering Investigation Institute Co.,Ltd.,Shijiazhuang,Hebei 050021,China;Technology Innovation Center for Groundwater Disaster Prevention and Control Engineering for Metal Mines Ministry of Natural Resources,Shijiazhuang,Hebei 050021z,China;Technological Innovation Center for Mine Groundwater Safety of Hebei Province,Shijiazhuang,Hebei 050021,China;BGRIMM Technology Group,Beijing 102628,China)

机构地区：[1]河北地质大学城市地质与工程学院,河北石家庄050031 [2]京津冀城市群地下空间智能探测与装备重点实验室,河北石家庄050031 [3]河北省地下人工环境智慧开发与管控技术创新中心,河北石家庄050031 [4]中国矿业大学资源与地球科学学院,江苏徐州221116 [5]彝良驰宏矿业有限公司,云南昭通657602 [6]华北有色工程勘察院有限公司,河北石家庄050021 [7]自然资源部金属矿山地下水灾害防治工程技术创新中心,河北石家庄050021 [8]河北省矿山地下水安全技术创新中心,河北石家庄050021 [9]矿冶科技集团有限公司,北京102628

出　　处：《中国矿业大学学报》2024年第5期1022-1036,共15页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(42172293)。

摘　　要：注浆帷幕是一项服务于矿山全生命周期的区域性防治水工程,其有效服役可以极大地降低深部采场的突涌水风险,保障深部资源的安全高效开采.毛坪铅锌矿地处扬子地块西南缘,地质构造发育,水文地质条件复杂,深部开采面临的突涌水风险较高.基于突水致灾危险源主动防控的理念,在河东矿区的北侧和南侧设计并实施了区域注浆帷幕改造工程.本文基于帷幕体光纤监测系统和矿区微震监测系统,分析了在采掘扰动应力和帷幕内外高渗透压差的联合作用下,帷幕“浆-岩”组合体的应力演化过程和损伤破裂机理.基于光纤和微震系统的监测结果,建立了注浆帷幕“浆-岩”组合体的采动渗流失稳模型和判据.光纤监测结果表明:北侧帷幕的0~140 m范围“浆-岩”组合体的稳定性较好,基本不受矿山采掘活动的扰动,但是,140~206 m范围受到了明显的剪切应力作用,是采掘扰动作用的结果;南侧帷幕的应变差和沉降量的变化较小,沉降速率随深度增加逐渐降低,受采掘工程扰动作用较小.微震监测结果表明:河东监测区的微震事件强度和频率显著高于河西监测区,并且北侧帷幕的东北方向和南侧帷幕的西侧微震事件呈局部带状分布,为帷幕体的薄弱部位,可能会诱发潜在的渗漏破坏.研究结果为矿山注浆帷幕的长期堵水有效性评价和深部防治水工程的实施提供了参考和借鉴.Grout curtain is a regional groundwater control project serving the whole life cycle of the mine.Its effective service can greatly reduce the risk of water inrush in deep stopes and ensure the safe and efficient exploitation of deep resources.Maoping lead-zinc mine is located in the southwest edge of Yangtze block,with developed geological structure,complex hydrogeological condition,and high risk of water inrush during deep mining.Based on the concept of active prevention and control of water inrush hazard,the regional grout curtain reconstruction project is designed and implemented in the north and south of eastern mining area.Based on the optical fiber monitoring system of the curtain body and the microseismic monitoring system of the mining area,this paper analyzes the stress evolution process and damage fracture mechanism of the grouted-rock composite of grout curtain under the coupling effects of the excavation disturbance stress and the high seepage pressure difference inside and outside the curtain.Based on the monitoring results of optical fiber and microseismic system,the instability model and criterion of the grouted-rock composite of grout curtain are established.The optical fiber monitoring results show that the stability of the grouted-rock composite within 0—140 m of the northern curtain is good,and it is basically not disturbed by mining activities.However,the 140—206mrange is affected by obvious shear stress,which is the result of mining disturbance.The variation of strain difference and settlement of the southern curtain is small,the settlement rate decreases gradually with the increase of depth,and is less disturbed by the mining engineering.The microseismic monitoring results show that the intensity and frequency of microseismic events in the eastern monitoring area are significantly higher than those in the western monitoring area,and the microseismic events in the northeast of the north curtain and in the west of the south curtain are locally banded,which are the weak parts of the curtain

关 键 词：分布式光纤 微震信号 帷幕注浆 “浆-岩”组合体 采动效应 

分 类 号：P641.4[天文地球—地质矿产勘探]