摘要
顶板失稳是威胁矿山矿柱安全回收的主要问题,某矿山为了确保安全、高效地回收矿柱,需要在矿山选定的四种矿柱回采、充填方案中优选出最优采充方案。结合矿山实际,采用FLAC^(3D)对矿柱回采方案进行分析研究。模拟结果显示,当充填体强度为2.2MPa时,采场尺寸较小,采用上向分层充填法较为保守,且对于维护采场与充填体稳定性并无显著优势,最终选择回采强度更高的浅孔留矿嗣后充填法。矿山现场试验结果表明,浅孔留矿嗣后充填法既保证了采场顶板稳定,又有效提高了矿柱回收效率和作业安全。
Roof instability is one of the main problems that threatening safe recovery of mine pillars. In order to ensure the safe and efficient recovery of the pillars, some mines have to select the best scheme of mining and filling in four preselected methods. In this paper, combination with the reality of the mine, softwareFLAC3D was used to analyze those ore-pillar stoping scheme. Simulation results show that, when the strength of the filling body is 2.2 MPa, upward filling method is more conservative for undersized stopes, and with no significant advantages for maintaining the stability of the mining field and backfill. Finally, the short-hole shrinkage backfilling method with higher stoping strength is chosen to recovery ore pillars. The field test results show that the short-hole shrinkage backfilling method can ensure the stability of stope roof, as well as improve the pillar recovery efficiency and operation safety effectively.
出处
《铜业工程》
CAS
2016年第6期33-39,共7页
Copper Engineering
基金
国家自然科学基金资助项目(51574013)
作者简介
徐恒（1993-），男，贵州遵义人，硕士研究生，主要从事金属矿山开采及矿山岩石力学方面的研究。E—mail：zunyixuheng@139.com.
