基于能量耗散原理的巷道最优开挖半径研究  

Study on optimal excavation radius of tunnel based on the principle of energy dissipation

作　　者：张军贤 潘一平 柯冰冰[1] 张军华 周琪琪 王清标[4] ZHANG Junxian;PAN Yiping;KE Bingbing;ZHANG Junhua;ZHOU Qiqi;WANG Qingbiao(Architecture and Civil Engineering Institute,Taizhou Vocational&Technical College,Taizhou 318000,Zhejiang,China;Huzhou Urban Architectural Design Co.,Ltd.,Huzhou 313000,Zhejiang,China;Tai Zhou Technician College,Taizhou 318000,Zhejiang,China;National Engineering Laboratory for Coalmine Backfilling Mining,Shandong University of Science and Technology,Qingdao 266590,Shandong,China)

机构地区：[1]台州职业技术学院建筑工程学院,浙江台州318000 [2]湖州城市建筑设计有限公司,浙江湖州313000 [3]台州技师学院,浙江台州318000 [4]山东科技大学煤矿充填开采国家工程实验室,山东青岛266590

出　　处：《矿产勘查》2024年第12期2370-2377,共8页Mineral Exploration

基　　金：国家自然科学基金“高陡边坡预应力锚索预应力损失机理及其试验研究”(41372289);浙江省教育厅一般科研项目(Y202352568);2024年度高校国内访问工程师“校企合作项目”(FG2024264);湖州市科技计划项目(2023GS02)联合资助。

摘　　要：因围岩开挖半径不合理造成的煤矿巷道失稳事故已屡见不鲜,巷道开挖最优半径的确定直接关系着巷道围岩的稳定性。研究指出围岩开挖过程中巷道失稳的实质是由围岩能量耗散与释放综合作用下导致的岩石损伤与裂纹产生所致,定义了深埋巷道围岩体开挖能量损伤因子与临界爆破准则,主要结论如下:(1)通过建立能量计算模型,推导出了临界开挖半径与临界爆破能的物理方程;(2)基于深埋巷道围岩体临界爆破能物理方程,提出了临界爆破能准则;(3)通过工程案例分析,得到了巷道开挖半径大小与围岩表面能的关系,并简化了临界开挖半径物理方程;(4)通过深入分析临界爆破能影响因素,基于临界爆破能准则,得到巷道最优开挖半径的物理方程。研究成果可为巷道开挖提供理论依据,确保巷道开挖作业的安全稳定性。The instability accidents caused by unreasonable rock excavation radius are often seen,and determine the optimal radius for tunnel excavation accurately is directly related to the stability of the tunnel.Research indicates that the substantial cause for tunnel instability during the tunnel excavation process is by rock damage and crack generation under the comprehensive effect of rock energy dissipation and release.This paper defines the energy damage factor and critical blasting criterion for tunnel excavation in deep buried tunnels.The main conclusions are as follows:(1)By establishing an energy calculation model,the physical equations for the critical excavation radius and critical blasting energy are derived;(2)Based on the physical equation of critical blasting energy tunnel excavation in deep buried tunnels,a critical blasting energy criterion is proposed;(3)The relationship between the excavation radius of the tunnel and the surface energy of the surrounding rock is obtained through analyzing engineering cases,and the physical equation for the critical excavation radius is simplified;(4)By deeply analyzing the factors affecting the critical blasting energy,the physical formula for the optimal excavation radius of the tunnel is obtained based on the critical blasting energy criterion.The research findings can provide a theoretical basis for tunnel excavation,ensuring the safety and stability of tunnel excavation operations.

关 键 词：能量损伤因子 临界开挖半径 临界爆破能准则 最优开挖半径 

分 类 号：TD32[矿业工程—矿井建设]