宽大采场充填顶板的稳定性分析研究  

Analysis and Research on the Stability of Filling Roof in Wide and Large Stope

作　　者：廖宁 王伟 李金良 张海云 张鹏飞 周礼 LIAO Ning;WANG Wei;LI Jinliang;ZHANG Haiyun;ZHANG Pengfei;ZHOU Li(Changsha Institute of Mining Research Co.,Ltd.,Changsha,Hunan 410012,China;National Engineering Research Center for Metal Mining,Changsha,Hunan 410012,China;Xi Ujimqin Banner Yinman Mining Co.,Ltd.,Xi Ujimqin Banner,Inner Mongolia 026217,China)

机构地区：[1]长沙矿山研究院有限责任公司,湖南长沙410012 [2]国家金属采矿工程技术研究中心,湖南长沙410012 [3]西乌珠穆沁旗银漫矿业有限责任公司,内蒙古锡林郭勒盟026211

出　　处：《矿业研究与开发》2024年第11期38-45,共8页Mining Research and Development

基　　金：“十四五”国家重点研发计划项目(2022YFC2905102)。

摘　　要：充填采矿法的推广应用,革新了金属矿地下开采模式以及间柱回采方式,提高了资源回采安全性和资源回采率。然而,针对宽大采场的顶柱资源回采,常需留设一定厚度的顶柱来维持充填体的稳定,造成资源浪费。因此,对宽大采场的充填顶板稳定性进行了研究。通过顶板稳定性理论计算,结合矿山充填体料浆配比试验,进行顶板结构优化以及强度设计研究,得到20 m分段高度时不同跨度下充填体顶板结构以及强度要求,并利用FLAC3D进行模拟验证。模拟结果表明:将设计的充填体作为中深孔采场直接顶板,有较好的稳定性,能满足强度要求。研究结果可为宽大采场充填顶板设计提供参考。The popularization and application of the filling mining method have innovated the underground mining mode and pillar mining mode of metal mines,and improved the safety and recovery rate of resources.However,for the mining of the top pillar resources in the wide and large stope,it is often necessary to set a certain thickness of the top pillar to maintain the stability of filling body,resulting in resources waste.Therefore,the stability of filling roof in wide and large stope was studied.Through the theoretical calculation of roof stability,combined with the slurry ratio test of filling body,the roof structure optimization and strength design were studied.The roof structure and strength requirements of filling body under different spans at 20msublevel height were obtained,and FLAC3Dwas used for simulation verification.The simulation results show that using the designed filling body as the direct roof of the medium-deep hole stope has a good stability and can meet the strength requirements.The research results can provide a reference for the design of filling roof in wide and large stopes.

关 键 词：充填体顶板 安全厚度 充填体强度 数值模拟 

分 类 号：TD853.34[矿业工程—金属矿开采]