考虑结构特征的采场胶结充填体稳定性分析  

Stability analysis of cemented tailings backfill in stope considering structural characteristics

作　　者：王冠男 童大志 汪杰 Wang Guannan;Tong Dazhi;Wang Jie(Chifeng Shanjin Hongling Nonferrous Mining Co.,Ltd.;School of Civil and Resource Engineering,University of Science and Technology Beijing)

机构地区：[1]赤峰山金红岭有色矿业有限责任公司 [2]北京科技大学土木与资源工程学院

出　　处：《黄金》2023年第9期21-30,共10页Gold

基　　金：国家重点研发计划重点专项(2022YFC2905003);中央高校基本科研业务费(FRF-TP-22-113A1)。

摘　　要：以阶段嗣后充填开采为背景,以胶结充填体为研究对象,基于莫尔-库仑破坏准则,综合考虑分层效应、顶部荷载、侧压系数等的影响,建立了大深宽比采场胶结充填体安全系数求解模型,并与其他学者的模型进行了对比验证,最后探讨各因素的影响特性。研究结果表明:滑动面位置存在位于第一分层、穿过2个分层和穿过3个分层等3种情形,且主要为前两种;对比其他模型,验证了本文模型的合理性与可靠性,不同模型研究背景不同,侧重点不同,结果存在一定差异;胶结充填体安全系数随顶部荷载、侧压系数和容重增大而减小,随内聚力、内摩擦角和内聚力比增大而增大,且它们之间均呈线性函数关系,其中安全系数对内聚力敏感度最高、对顶部荷载敏感度最低。In the context of stage-by-stage subsequent backfill mining,this study focuses on the cemented fill body and establishes a safety factor calculation model for large-depth-to-width ratio mining stopes.Based on the Mohr-Coulomb failure criterion and considering the influences of stratification effects,top load,and lateral pressure coefficient,the model takes into account these factors and provides a solution for the safety factor of the cemented fill body.The model is compared and validated against models developed by other researchers,and the influence characteristics of each factor are discussed.The research results show that there are 3 possible locations for the sliding plane:within the first stratification layer,crossing 2 stratification layers,and crossing 3 stratification layers,with the first 2 being the main scenarios.By comparing with other models,the rationality and reliability of the proposed model are confirmed.It should be noted that different models have different research backgrounds and emphases,which may lead to certain differences in the results.The safety factor of the cemented fill body decreases with an increase in top load,lateral pressure coefficient,and unit weight,while it increases with an increase in cohesion,internal friction angle,and cohesion-to-friction ratio.The relationships between these factors and the safety factor are linear.Among them,the safety factor is most sensitive to cohesion and least sensitive to top load.

关 键 词：结构特征 嗣后充填 胶结充填体 分层效应 安全系数 稳定性分析 

分 类 号：TD853.34[矿业工程—金属矿开采]