急倾斜极薄矿脉小型机械化留矿法开采采场稳定性分析  

Stability Analysis of Stope by Small-Scale Mechanized Shrinkage Mining for Steeply Inclined and Extremely Thin Veins

作　　者：朱建国[1,2] 雷显权 刘福春[1,2] 熊有为 张军[3] 刘恩彦 ZHU Jianguo;LEI Xianquan;LIU Fuchun;XIONG Youwei;ZHANG Jun;LIU Enyan(CINF Engineering Co.,Ltd.,Changsha 410019,China;Hunan Provincial Engineering Research Center for Safe and Efficient Mining Technology of Deep Mines,Changsha 410019,China;Guangxi Guihuacheng Co.,Ltd.,Hezhou 542611,China)

机构地区：[1]长沙有色冶金设计研究院有限公司,长沙410019 [2]深井矿山安全高效开采技术湖南省工程研究中心,长沙410019 [3]广西桂华成有限责任公司,广西贺州542611

出　　处：《有色金属工程》2024年第8期138-148,206,共12页Nonferrous Metals Engineering

基　　金：中国有色矿业集团有限公司“揭榜挂帅”重大科技攻关项目(2022-JBGS-003)。

摘　　要：基于珊瑚钨矿急倾斜极薄矿脉小型机械化留矿法开采工艺,采用数值模拟方法分析了开采过程中采场的稳定性,探讨了采场长度、相邻采场开采时应控制的安全距离和回采顺序。结果表明:1)矿体采出后,采场上下盘围岩发生以水平向位移为主的相向位移,采空区上下两端与顶底板接触位置发生应力集中,采空区两侧围岩应力降低;2)采场长度对采场稳定性的影响较小,为提高单条采场生产能力,采场长度可由试验阶段的100 m增加到150~200 m;3)为减小相邻采场开采扰动,相邻采场开采时的安全距离应控制在4 m以上,局部地段围岩条件较差时还应适当加大;4)对于上下相邻采场,待采矿体位于已采采场的下盘围岩移动范围更有利于采场稳定性控制,建议采用从上向下的回采顺序。研究结果可为采矿工程实践提供一定的参数参考。Based on the small-scale mechanized shrinkage mining technology forthe steeply inclined and extremely thin veins in the Shanhu tungsten mine,the stability of stope in the mining process has been analyzed by numerical modeling,and the length of stope,the safe distance between adjacent stopes should be controlled and the stopping sequence have been discussed.The results show that:1)After the ore body was mined,the hanging wall and footwall surrounding rock of stope have the opposite displacement mainly horizontal displacement,the stress concentration occurs at the contact between the upper and lower ends of the goaf and the roof and floor,the stress of surrounding rock on both sides of the goaf is reduced.2)The stope length has little influence on the stability of stope,and the stope length can be increased from 100 m in the test stage to 150-200 m,so as to improve the production capacity of a single stope.3)In order to reduce the mining disturbance of the adjacent stope,the safety distance between two adjacent stopes should be controlled above 4 m,and also should be increased appropriately when the rock mass condition is poor in some parts.4)For stopes adjacent to each other,it is more beneficial to the stability control when the body to be mined is located in the movement range of the footwall surrounding rock of the first stope,so it is recommended to adopt a stopping sequence from hanging wall to footwall.The research results can provide some parameters reference for mining engineering practice.

关 键 词：急倾斜矿体 极薄矿脉 机械化开采 稳定性分析 

分 类 号：TD853.33[矿业工程—金属矿开采]