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采动影响下多构造拉底巷道稳定性控制技术研究
- 王少勇|曾庆田|武鹏杰|李争荣|孙伟|朱霆
- 作者单位：
- 北京科技大学土木与资源工程学院|云南迪庆有色金属有限责任公司|北京科技大学土木与资源工程学院|云南迪庆有色金属有限责任公司|昆明理工大学国土资源工程学院|金诚信矿业管理股份有限公司
基金项目：
- 国家自然科学基金重点项目（52130404）;中国博士后科学基金资助项目（2021M691359）
详细信息：
- 作者简介：
- 王少勇（1983—），男，高级工程师，博士，从事膏体充填理论与技术研究方面的工作；E-mail:wshy0226@163.com
- 通讯作者：
- isnull
- PDF下载
Research on the stability control technology of multi-structure undercutting roadway under mining disturbances
- English Author：
- School of Civil and Resource Engineering,University of Science and Technology Beijing|Yunnan Diqing Nonferrous Metals Industry Co.,Ltd.|School of Civil and Resource Engineering,University of Science and Technology Beijing|Yunnan Diqing Nonferrous Metals Industry Co.,Ltd.|Faculty of Land and Resources Engineering,Kunming University of Science and Technology|JCHX Mining Management Co.,Ltd.
- Unit：
- 摘要
- 在线预览
- 参考文献
摘要:
拉底巷道在服务期内的稳定控制是自然崩落采矿法金属矿山生产管理中的重要部分。当拉底巷道布置在断层破碎带区域，复杂的构造条件会加剧采动应力对巷道围岩的破坏。为了明晰高应力复杂构造条件下拉底巷道围岩发生破坏的本质原因，通过构建采动影响下断层活化滑移力学判据，并模拟不同采动作业条件下拉底巷道弱层?а业挠αψ魄榭觯⑾指丛庸乖焯跫吕紫锏榔苹翟蚩晒槟晌“断层活化—弱层失稳”复合型破坏机制。并针对性地提出了大面积连续拉底应力迁移调控技术和以“高强度机械化湿喷混凝土”为核心的差异化补强精准支护技术，稳定性控制技术推广以来，拉底巷道围岩失稳现象明显减少，围岩年变形率降低了50 %，巷道返修率由20 %降低至5 %，为类似金属矿山开展复杂构造条件下巷道围岩精准控制提供了工程借鉴。
关键词:
拉底巷道；断层破碎带；断层活化滑移；应力迁移；差异化支护
Abstract:
The stable control of the undercutting roadway during the service period is an important part of the production management of natural caving metal mines.When the undercutting roadway is arranged in the fault fracture zone,the complex structural conditions will intensify the damage of mining stress to the surrounding rock of the roadway.To clarify the essential reason for the failure of the surrounding rock of the undercutting roadway under the condition of high stress and complex structure,this paper constructs the fault activated slip mechanics criterion under mining disturbances and simulates the stress transfer of the weak layer surrounding rock of the undercutting roadway under different mining operating conditions.It is found that the failure caused by the bottom roadway under complex structural conditions can be summarized as a composite failure mechanism of fault activation—weak layer instability.The paper correspondingly proposes a large-area continuous undercutting stress migration control technology and a differentiated reinforcement precision support technology centered on high-strength mechanized wet shotcrete.Since the promotion of stability control technology,the surrounding rock of the undercutting roadway has become unstable phenomenon has been significantly reduced,the annual deformation rate of surrounding rock has been reduced by 50 %,and the roadway repair rate has been lowered from 20 % to 5 %,which provides engineering reference for the precise control of roadway surrounding rock under complex structural conditions in similar metal mines.
Keywords:
undercutting roadway;fault fracture zone;fault activated slip;stress migration;differentiated support
