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

作　　者：杜荣杰 王卫军 袁超 范磊 马谕杰 苏小伟 DU Rongjie;WANG Weijun;YUAN Chao;FAN Lei;MA Yujie;SU Xiaowei(College of Resources,Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China)

机构地区：[1]湖南科技大学资源环境与安全工程学院,湖南湘潭411201

出　　处：《湖南科技大学学报（自然科学版）》2024年第3期1-10,共10页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：国家自然科学基金资助项目(52274080)。

摘　　要：以湖南坦家冲煤矿-80 m北石门作为工程案例,基于能量原理和尖点突变理论,构建以巷道围岩总耗散能作为变量的耗散能突变判别准则,分析巷道围岩的耗散能演化过程,提出耗散能突变特征值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“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地保持巷道围岩的稳定性.Taking the-80 m North Stone Gate of Tanjiachong Coal Mine in Hunan Province as the 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 variable.The evolution process of dissipative energy of roadway surrounding rock is analyzed,and the sudden change characteristic valueΔis proposed.It is found that the surrounding rock is stable whenΔ>0.WhenΔ<0,the surrounding rock of roadway enters the unstable state.WhenΔ=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.

关 键 词：能量守恒原理 突变理论 耗散能 围岩控制 

分 类 号：TD311[矿业工程—矿井建设]