矿产保护与利用2025，Vol.45Issue(4)：39-48,10.DOI:10.13779/j.cnki.issn1001-0076.2025.04.003
基于采充协同的倾斜中厚破碎矿体安全高效开采技术
Safe and Efficient Mining Technology for Inclined Medium-Thick Fractured Ore Bodies Based on Stoping-Backfill Synergy
摘要
Abstract
Mining inclined medium-thick fractured ore bodies presents challenges,including poor rock stability,geotechnical hazards in stopes,and low resource recovery rates.This study integrates engineering geological surveys,rock mechanics testing,Mathews stability graph method,Q-system,RMR classification,and numerical modeling to investigate the mechanical properties,stope stability,and backfill strength requirements using a tungsten mine in Hunan as a case study.Key findings reveal:(1)Vertical heterogeneity in rock mass quality-basal granite exhibits optimal stability(UCS=108.62 MPa),while mineralized slate is the weakest(3.67 MPa),with a self-supporting time limited to 37 days;(2)the allowable exposed area of a stope is positively correlated with the rock mass quality.For granite stopes,the span can reach 18 m and the height 40 m,whereas for fractured ore bodies,the span must be controlled within 13-14 m,combined with short-cycle backfilling(≤30 d)and joint shotcrete-bolt-mesh support;(3)identification of 18m as critical span threshold,beyond which the plastic zone expands>50%,and 40 m-high stopes show a 40%increase in stress concentration compared to 20 m scenarios.The study proposes a"differentiated backfill strength design":2.5 MPa for primary stoping,0.5 MPa for secondary stages,and 1.38 MPa for layered backfill,coupled with an innovative graded binder-tailings ratio control system.These measures increased ore recovery from 40%to 88%while reducing dilution from 15%to 6%.A zoned backfill technology framework was developed based on mining phases and spatial positions,developing an"optimized delayed backfill method"with stoping-backfill synergy.The results provide theoretical and practical guidance for the safe and efficient mining of similar complex deposits.关键词
倾斜中厚矿体/数值模拟/采场稳定性/阶段空场嗣后充填法/采充协同/安全高效Key words
inclined medium-thick ore body/numerical simulation/stope stability/optimized delayed backfill method/mining-backfill synergy/safe and efficient mining分类
矿业与冶金引用本文复制引用
蒋荣,张庆澳,李俊斌,蒋俊,焦华喆,武昱行..基于采充协同的倾斜中厚破碎矿体安全高效开采技术[J].矿产保护与利用,2025,45(4):39-48,10.基金项目
国家重点研发计划项目(2023YFC2907203) （2023YFC2907203）
