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高海拔破碎围岩排水巷道锚索支护参数优化
- 沈泉生|王志勇|赵紫月
- 作者单位：
- 西藏巨龙铜业有限公司|西藏巨龙铜业有限公司|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（2022YFC2905003）
详细信息：
- 作者简介：
- 沈泉生（1967—），男，高级工程师，从事矿山管理工作；E-mail：290143567@qq.com
- 通讯作者：
- 赵紫月（1996—），男，硕士研究生，从事金属矿山采矿工艺等方面的研究工作；E-mail：zhaoziyue0211@163.com
- PDF下载
Optimization of bolt support parameters for drainage roadway of high-altitude broken surrounding rock
- English Author：
- Xizang Julong Copper Industry Co.,Ltd.|Xizang Julong Copper Industry Co.,Ltd.|School of Civil and Resources Engineering,University of Science and Technology Beijing
- Unit：
- 摘要
- 在线预览
- 参考文献
摘要:
合理的支护形式与支护参数是确保巷道围岩稳定的关键。巨龙铜矿排水巷道Ⅳ级围岩区域采用锚杆＋金属网＋喷浆进行联合支护效果较差。针对巨龙铜矿Ⅳ级围岩区域支护存在的问题，在现有支护基础上增加锚索和钢拱架支护，同时增加喷浆厚度。设计了不同锚索支护参数，利用有限元数值模拟软件进行了锚索支护参数优化。结果表明：巷道围岩顶板处存在明显应力集中现象。随着锚索支护参数增加，巷道顶板处最大应力值增加。随着锚索间排距增大，巷道顶板最大位移增加，锚杆间距由1.2 m增加至2.0 m，巷道顶板位移分别为4 mm、4.38 mm、4.82 mm。锚索最优支护参数为1.6 m×2.4 m。研究结果为类似巷道锚索支护参数选取提供了理论参考。
关键词:
高海拔；巷道支护；破碎围岩；锚索支护；数值模拟
Abstract:
Reasonable support form and support parameters are the key to ensuring the stability of the roadway surrounding rock.The joint support effect of bolt ＋ metal mesh ＋ shot grouting in the Grade Ⅳ surrounding rock area of the drainage roadway of Julong Copper Mine in Xizang is poor.In this paper,for the problems of support in the Grade Ⅳ surrounding rock area of the drainage roadway of Julong Copper Mine,bolt and steel arch support,as well as the thickness of shot grouting,is introduced on the basis of the existing support.Different bolt support parameters are designed and optimized using finite element numerical simulation software.The results show that there is an obvious stress addition phenomenon at the roadway surrounding rock roof.With the increase of bolt support parameters,the maximum stress value at the roadway roof increases.With the increase of row spacing between bolts,the maximum displacement of the roadway roof increases,the bolt spacing increases from 1.2 m to 2.0 m,and the displacement of the roadway roof is 4 mm,4.38 mm,and 4.82 mm,respectively.The optimal support parameter of the bolts is 1.6 m×2.4 m.The results of the study provide theoretical references for the selection of the support parameters of the bolts of similar roadways.
Keywords:
high altitude;roadway support;broken surrounding rock;bolt support;numerical simulation
