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焦家金矿巷道围岩承载结构随岩体质量演化规律
- 作者：
王兴亚1，刘立波2*，郭奇峰2
- 作者单位：
- （1.山东黄金矿业（莱州）有限公司焦家金矿；2.北京科技大学土木与资源工程学院）
基金项目：
- 国家重点研发计划项目（2021YFC3001301）
详细信息：
- 作者简介：
- 王兴亚（1990—），男，工程师，从事金属矿山采矿工程研究工作；E‑mail：106533252@qq. com
- 通讯作者：
- 刘立波（2001—），男，硕士研究生，研究方向为金属矿山采矿技术；E⁃mail：1009694188@qq. com
- PDF下载
Evolutionary rules of load-bearing structure of roadway surrounding rock in the Jiaojia Gold Mine
- English Author：
Wang Xingya1, Liu Libo2*, Guo Qifeng2
- Unit：
- (1. Jiaojia Gold Mine, Shandong Gold Mining Industry (Laizhou) Co.., Ltd.:; 2. School of Civil and Resource Engineering, University of Science and Technology Beijing)
- 摘要
- 在线预览
- 参考文献
摘要:
以焦家金矿-790 m中段为研究对象，建立了巷道围岩承载结构力学模型，基于巷道和围岩协同承载机制，考虑围岩损伤分区，结合松动圈声波测试试验，确定了松动圈范围，为岩石的稳定性评价及支护设计提供了依据，采用 Flac3D软件对巷道围岩承载结构特征及支护作用进行了数值模拟研究。研究结果表明：围岩强度等级越低，支撑层的厚度越大，围岩表面位移也就越大；关键支撑层离巷道越远，巷道表面位移越大；围岩的支护阻力越大，支撑层的厚度越小，关键支撑层离巷道越近，越有利于控制巷道的变形。
关键词:
巷道围岩；承载结构；损伤分区；数值模拟；岩体质量评价；稳定性
Abstract:
Taking the -790 m level of the Jiaojia Gold Mine as the research object, a mechanical model of theload‑bearing structure of the roadway surrounding rock was established. Based on the cooperative bearing mechanismof the roadway and surrounding rock, considering the damage zoning of the surrounding rock, and combining with theloose circle ultrasonic testing experiment, the range of the loose circle was determined, which provided a basis for thestability evaluation of the rock and the design of support. The Flac3D software was used to numerically simulate the cha‑racteristics of the load‑bearing structure of the surrounding rock and the supporting effect. The research results showthat the lower the strength grade of the surrounding rock, the thicker the thickness of the supporting layer, and the greaterthe surface displacement of the surrounding rock; the farther the key supporting layer is from the roadway, the greaterthe surface displacement of the roadway; the greater the supporting resistance of the surrounding rock, the thinner thethickness of the supporting layer, and the closer the key supporting layer is to the roadway, the more favorable it is forcontrolling the deformation of the roadway.
Keywords:
roadway surrounding rock; load‑bearing structure; damage zoning; numerical simulation; rock massquality evaluation; stability
