海下金矿破碎围岩空区治理二次开采稳定性研究  

Study on the Stability of Secondary Mining for the Treatment of Broken Surrounding Rock Goaf of Seabed Gold Mine

作　　者：夏文浩 宋卫东[1,2] 李杨[1,2,3] 付建新[1,2] 张少鹏 XIA Wenhao;SONG Weidong;LI Yang;FU Janxin;ZHANG Shaopeng(School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China;Key Laboratory of High-Efficient Mining and Safety of Metal Mines,Ministry of Education,Beijing 100083,China;Sanshandao Gold Mine of Shandong Gold Mining(Laizhou)Co.,Ltd.,Laizhou 261442,China)

机构地区：[1]北京科技大学土木与资源工程学院,北京100083 [2]金属矿山高效开采与安全教育部重点实验室,北京100083 [3]山东黄金矿业(莱州)有限公司三山岛金矿,山东莱州261442

出　　处：《金属矿山》2023年第4期8-14,共7页Metal Mine

基　　金：中国博士后科学基金项目(编号:2020M682205);国家自然科学基金项目(编号:51974012,52274109)。

摘　　要：为保证三山岛金矿治理后的二次开采能够安全高效进行,采用FLAC3D对未治理工况和治理工况下二次开采各阶段进行模拟研究。结果表明:治理工况下采场围岩应力集中区域明显减小,矿柱塑性区仅集中在矿柱表面,隔水层变形小于《有色金属采矿设计规范》所规定的Ⅰ级建构筑物所允许的变形值;治理工程缓解了采场围岩的应力集中和变形、减少了第四系隔水层变形移动,能够有效提高新立矿区岩体的整体稳定性;现场监测结果与模拟结果较为契合,监测值均在允许范围内。因此可认为治理后二次回采过程矿区岩体处于稳定状态,研究结果可为矿山安全高效开采提供依据,并为确定后续监测重点提供参考。To ensure that the secondary mining of Sanshandao Gold Mine after treatment can be carried out safely and efficiently,FLAC3D was used to simulate the secondary mining stages under the untreated and treated conditions.The results showed that the stress concentration area of the surrounding rock of the stope was significantly reduced under the treatment conditions,the plastic zone of the ore pillar was only concentrated on the surface of the ore pillar,The deformation of the aquiclude is less than the allowable deformation value of Class I buildings and structures specified in the"Code for design of nonferrous metal mining".The treatment project alleviates the stress concentration and deformation of the surrounding rock of the stope,reduces the deformation and movement of the Quaternary aquiclude,and can effectively improve the overall stability of the rock mass in Xinli mining area;The on-site monitoring results are consistent with the simulation results,and the monitoring values are within the allowable range.Therefore,it can be considered that the rock mass in the mining area is in a stable state during the secondary mining process after treatment,and the research results can provide a basis for safe and efficient mining of the mine,and provide a reference for determining the follow-up monitoring focus.

关 键 词：海底矿山 破碎围岩 空区治理 数值模拟 稳定性分析 

分 类 号：TD853[矿业工程—金属矿开采]