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| 揭穿煤层前巷道围岩耗散能突变判别方式及稳定性分析 |
| Debunks Sudden discrimination method and Stability analysis of dissipative energy in roadway surrounding rock in front of coal seam |
| 投稿时间：2024-03-10 修订日期：2024-06-21 |
| DOI： |
| 中文关键词: 能量守恒原理 突变理论 耗散能 围岩控制 |
| 英文关键词: energy conservation principle Mutation theory Dissipated energy Surrounding rock control |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 中文摘要: |
| 以湖南坦家冲煤矿-80m北石门作为工程案例,基于能量原理和尖点突变理论,构建了以巷道围岩总耗散能作为变量的耗散能突变判别准则,分析了巷道围岩的耗散能演化过程,提出了耗散能突变特征值Δ。研究发现,当Δ＞0时,巷道围岩稳定；当Δ＜0时,巷道围岩进入失稳状态；Δ=0时,围岩处于临界失稳状态,此时围岩极易受到扰动从稳定状态变为失稳状态。基于巷道变形破坏特征及耗散能演化特征,提出了“全断面高强度树脂锚杆+锚网喷+高强弹性锚索”联合支护方式,工程实践结果表明,该联合支护方式能够有效保持巷道围岩的稳定性。 |
| 英文摘要: |
| Taking the -80m Beishimen of Tanjiachong Coal Mine in Hunan Province as an engineering case, based on the energy principle and the cusp mutation theory, a criterion for sudden change of dissipative energy is established, which takes the total dissipative energy of roadway surrounding rock as a variable. The evolution process of dissipative energy of roadway surrounding rock is analyzed, and the sudden change characteristic value Δ is proposed. It is found that the surrounding rock is stable when Δ>0; When Δ<0, the surrounding rock of roadway enters the unstable state; When Δ=0, the surrounding rock is in the critical instability state, and the surrounding rock is easily disturbed from the stable state to the unstable state. Based on the deformation and failure characteristics of roadway and the evolution characteristics of dissipated energy, the combined support method of "full section high-strength resin bolt + anchor net spray + high-strength elastic anchor cable" is proposed. The engineering practice results show that the combined support method can effectively maintain the stability of roadway surrounding rock. |
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