| 张军贤,潘一平,柯冰冰,张军华,周琪琪,王清标.基于能量耗散原理的巷道最优开挖半径研究[J].矿产勘查,2024,15(12):2370-2377 |
| 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 en-ergy dissipation |
| 投稿时间：2023-03-30 |
| DOI：10.20008/j.kckc.202412020 |
| 中文关键词: 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 |
| 英文关键词: energy damage factor critical excavation radius critical blasting energy criterion optimum excava. tion radius |
| 基金项目: |
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| 中文摘要: |
| 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。 |
| 英文摘要: |
| The instability accidents caused by unreasonable rock excavation radius are often seen, and deter.mine the optimal radius for tunnel excavation accurately is directly related to the stability of the tunnel. Research in.dicates that the substantial cause for tunnel instability during the tunnel excavation process is by rock damage andcrack generation under the comprehensive effect of rock energy dissipation and release. This paper defines the en.ergy damage factor and critical blasting criterion for tunnel excavation in deep buried tunnels. The main conclusionsare as follows: (1) By establishing an energy calculation model, the physical equations for the critical excavation ra.dius and critical blasting energy are derived; (2) Based on the physical equation of critical blasting energy tunnel ex.cavation in deep buried tunnels, a critical blasting energy criterion is proposed; (3) The relationship between the ex.cavation radius of the tunnel and the surface energy of the surrounding rock is obtained through analyzing engineer.ing cases, and the physical equation for the critical excavation radius is simplified; (4) By deeply analyzing the fac.tors affecting the critical blasting energy, the physical formula for the optimal excavation radius of the tunnel is ob.tained based on the critical blasting energy criterion. The research findings can provide a theoretical basis for tunnelexcavation, ensuring the safety and stability of tunnel excavation operations. |
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