预应力膨胀支柱支护的进路式采场跨度扩大技术  

Stope Span Enlargement Technology with the Drifted Method Supported by the Prestressed Expandable Pillar

作　　者：李坤蒙 于鹏飞 姜凯元[1,2,3] 李元辉 LI Kun-meng;YU Peng-fei;JIANG Kai-yuan;LI Yuan-hui(School of Resources&Civil Engineering,Northeastern University,Shenyang 110819,China;Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines,Northeastern University,Shenyang 110819,China;Institute of Deep Engineering and Intelligent,Northeastern University,Shenyang 110819,China.)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819 [2]东北大学深部金属矿山安全开采教育部重点实验室,辽宁沈阳110819 [3]东北大学深部工程与智能技术研究院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2023年第11期1604-1611,共8页Journal of Northeastern University(Natural Science)

基　　金：国家重点研发计划项目(2022YFC2903804);国家自然科学基金资助项目(52374117,52004054,52274115)

摘　　要：为提高矿石产能,研发上向进路充填采矿法采场跨度扩大技术.通过数值模拟可知,相比于原岩矿柱,膨胀支柱支护条件下采场顶板垂直变形增加10 mm,塑性区体积增加15.8 m^(3).而相比于无支护,膨胀支柱支护可限制采场顶板最大垂直位移13 mm和减少塑性区体积160.1 m^(3).开展现场工业性试验,监测膨胀支柱承载力与采场顶板垂直变形.采场顶板变形和膨胀支柱承载力随间柱回采不断增大,支柱的最大承载力不超过655.6 kN,采场顶板最大下沉量不超过10 mm.从技术经济效益分析,试验采场利润约达26.7万元,采场跨度从3 m扩大至9 m,矿石回采率提高30%.In order to improve the production capacity of ore,the stope span enlargement technology of upward drift-and-fill mining method is developed.Numerical simulations reveal that,compared with the natural pillar,the use of expandable pillar support results in a 10mm increase in vertical deformation of roof and a 15.8m^(3) expansion in the volume of the plastic zone.Compared with no support,the expandable pillar support effectively limits the maximum vertical displacement of roof to 13mm and reduces the volume of plastic zone by 160.1m^(3).A field industrial test is carried out to monitor the bearing load of prestressed expandable pillars and the vertical deformation of stope roof.The deformation of roof and the bearing performance of expandable pillar increase with the recovery of rib pillar,the maximum bearing load on prestressed expandable pillars does not exceed 655.6kN,and the maximum deformation of the stope roof is below 10 mm.From a technical and economic standpoint,the profit of test stope is 267000 yuan,the stope span enlarges from 3 to 9m,and the ore recovery rate improves by 30%.

关 键 词：膨胀支柱 进路充填采矿法 采场跨度 顶板变形 支柱承载 

分 类 号：TD355[矿业工程—矿井建设]