本文選題：圍巖 + 黏彈性��； 參考：《中國礦業(yè)大學學報》2017年03期

【摘要】：在地下巖體工程中,無論是軟巖還是硬巖,只要巖體受力后的應力水平達到或超過該巖體的流變下限,都將隨著時間的增長而發(fā)生流變變形.基于此,針對圓形斷面巷道,在考慮巷道掘進面空間效應的基礎上,根據(jù)黏彈性理論,建立巷道圍巖與支護結構的二次支護耦合作用模型,并獲取解析解.按照該思路,可遞推出多次支護情況下圍巖與支護結構的耦合作用過程.通過算例分析了初次和二次支護時間對支護結構與圍巖以及支護結構與支護結構之間相互作用力的影響.結果顯示,支護時間對支護結構與圍巖以及支護結構與支護結構之間的相互作用力有顯著的影響;當二次支護時間不變時,第1個支護結構與巷道圍巖之間的相互作用力隨著初次支護時間的增大而減小,第1個支護結構與第2個支護結構之間的相互作用力隨著初次支護時間的增大而增大;當初次支護時間不變時,支護結構與圍巖以及支護結構與支護結構之間的相互作用力都隨著二次支護時間的增大而減小.
[Abstract]:In underground rock mass engineering, no matter soft rock or hard rock, as long as the stress level of rock mass reaches or exceeds the lower rheological limit of rock mass, rheological deformation will occur with the increase of time. Based on this, considering the spatial effect of roadway driving surface, the coupling model of secondary support between surrounding rock and supporting structure of roadway is established according to viscoelastic theory, and the analytical solution is obtained. According to this idea, the coupling process between surrounding rock and supporting structure can be deduced recursively. The influence of primary and secondary support time on the interaction between supporting structure and surrounding rock and between supporting structure and supporting structure is analyzed by an example. The results show that the supporting time has a significant effect on the interaction between the supporting structure and surrounding rock and between the supporting structure and the supporting structure, and when the time of secondary support is unchanged, The interaction force between the first supporting structure and the surrounding rock of roadway decreases with the increase of the initial support time, and the interaction between the first support structure and the second support structure increases with the increase of the initial supporting time. When the initial support time is invariant, the interaction force between the supporting structure and surrounding rock and between the supporting structure and the supporting structure decreases with the increase of the secondary support time.
【作者單位】： 西安科技大學理學院;西安科技大學西部礦井開采及災害防治教育部重點實驗室;西安科技大學能源學院;
【基金】：國家自然科學基金重點項目(51634007);國家自然科學基金青年項目(51204132) 陜西省青年科技新星支持計劃項目(2015KJXX-36)
【分類號】：TD26

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本文編號：1972387