矿山深部破碎站右侧硐段应力-结构性破坏研究  

Study on Stress-Structural Failure of Right Tunnel Section of Deep Mine Crushing Station

作　　者：薛晓强 段振国 张立立 孟森 张思达 辛杰 XUE Xiaoqiang;DUAN Zhenguo;ZHANG Lili;MENG Sen;ZHANG Sida;XIN Jie(Shaanxi Xiaobaodang Mining Co.,Ltd.,Shaanxi Coal and Chemical Industry Group Co.,Ltd.,Yulin,Shannxi 719302,China;Shaanxi Tiandi Geology Co.,Ltd.,Xi'an,Shannxi 710054,China;State Key Laboratory of Geotechnical Mechanics and Engineering,Insitute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,Hubei 430071,China)

机构地区：[1]陕西煤业化工集团陕西小保当矿业有限公司,陕西榆林市719302 [2]陕西天地地质有限责任公司,陕西西安710054 [3]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北武汉430071

出　　处：《矿业研究与开发》2025年第2期1-8,共8页Mining Research and Development

基　　金：陕西省煤田地质集团科技创新能力支撑项目(SMDZ-2023CX-18);陕煤地质集团重大专项项目(SMDZ-2022ZD-1);陕西省重点研发计划一般项目(2023-YBSF-544);陕煤联合基金项目(2021JLM-14)。

摘　　要：为解决深部破碎站右侧硐段开挖后可能引发的应力-结构性破坏问题,使用无人机采集了掌子面地质条件和岩体产状信息,结合显式离散元数值模拟软件3DEC构建了深部破碎站右侧硐段的三维岩体结构数值计算模型,探究深部岩体在高应力条件下的变形特征、破坏机制和失稳模式,并提出防治措施。研究结果表明,该硐段的围岩稳定性受到红褐色花岗岩地层和灰黑灰色片麻地层接触区以及地应力场的双重控制,导致硐段应力-结构性破坏的原因是破碎站开挖卸荷导致JSet#2与JSet#3节理组与开挖面易形成不利块体。因此,对于节理发育的硐段,应力-结构性破坏灾害是破碎站开挖后需要特别关注的围岩稳定性问题。建议采用“优化开挖参数+联合支护形式”的方法,从表层、浅层和深层3个层次系统地控制破碎站开挖卸荷后的应力-结构性破坏。To solve the problem of stress-structural failure that may be caused by the excavation of the right tunnel section of deep crushing station, the geological conditions of the tunnel face and the attitude information of the rock mass were collected by UAV, and the three-dimensional rock mass structure numerical calculation model of the right tunnel section of deep crushing station was constructed by combining the display discrete element numerical simulation software 3DEC. The deformation characteristics, failure mechanism and loss mode of deep rock mass under high stress conditions were explored, and the prevention measures were put forward. The results show that the stability of the surrounding rock of the tunnel section is controlled by the contact area of the red-brown granite stratum and the gray-black gray gneiss stratum and the in-situ stress field. The reason for the stress-structural failure of the tunnel section is that the excavation unloading of the crushing station leads to the formation of unfavorable blocks in the JSet #2 and JSet #3 joint groups and the excavation surface. Therefore, for the tunnel section with developed joints, the stress-structural failure disaster is a problem that needs special attention for the stability of surrounding rock after the excavation of the crushing station. It is suggested that the method of “optimizing excavation parameters + combined support form” should be adopted to systematically control the stress-structural damage after excavation unloading of crushing station from three levels of surface, shallow and deep layers.

关 键 词：深部矿山 高地应力 应力-结构性破坏 三维重构 数值模拟 支护方法 

分 类 号：TD313[矿业工程—矿井建设] TU452[建筑科学—岩土工程]