东北大学学报(自然科学版) ›› 2023, Vol. 44 ›› Issue (11): 1604-1611.DOI: 10.12068/j.issn.1005-3026.2023.11.013

• 资源与土木工程 • 上一篇    下一篇

预应力膨胀支柱支护的进路式采场跨度扩大技术

李坤蒙1,2,3, 于鹏飞1,2,3, 姜凯元1,2,3, 李元辉1,2,3   

  1. (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)
  • 发布日期:2023-12-05
  • 通讯作者: 李坤蒙
  • 作者简介:李坤蒙(1990-),男,陕西西安人,东北大学副教授; 李元辉(1968-),男,辽宁营口人,东北大学教授,博士生导师.
  • 基金资助:
    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).

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

LI Kun-meng1,2,3, YU Peng-fei1,2,3, JIANG Kai-yuan1,2,3, LI Yuan-hui1,2,3   

  1. 1. School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China; 2. Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, Northeastern University, Shenyang 110819, China; 3. Institute of Deep Engineering and Intelligent, Northeastern University, Shenyang 110819, China.
  • Published:2023-12-05
  • Contact: YU Peng-fei
  • About author:-
  • Supported by:
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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10mm,塑性区体积增加15.8m3.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13mm和减少塑性区体积160.1m3.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655.6kN,采场顶板最大下沉量不超过10mm.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3m扩大至9m,矿石回采率提高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

Abstract: 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 15.8m3 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 160.1m3. 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%.

Key words: expandable pillar; drift-and-fill mining method; stope span; deformation of roof; pillars bearing

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