本文選題：“U”型鋼支架 + 偏載�。� 參考：《遼寧工程技術(shù)大學(xué)學(xué)報(自然科學(xué)版)》2017年06期

【摘要】：為提高巷道"U"型鋼支護(hù)的整體性效果,及研究在偏載下支架的內(nèi)力分布規(guī)律和穩(wěn)定性以利于優(yōu)化支架分布.基于林南倉礦工程背景,采用數(shù)值分析方法,對支架的軸力、剪力、彎矩和位移沿巷道掘進(jìn)方向的分布規(guī)律進(jìn)行數(shù)值模擬.研究結(jié)果表明:軸力在支架腿處最大,頂處最小,剪力和彎矩在頂處、腿處和拱部部分區(qū)域較大;沿巷道方向,軸力整體比較平穩(wěn),在每個開挖步內(nèi)有所差距,支架剪力和彎矩在總開挖巷道內(nèi)逐漸減小;當(dāng)偏壓0.9 MPa時對圍巖和支架的影響較大,圍巖出現(xiàn)較大的塑性范圍.支架內(nèi)力在第一個開挖步內(nèi)出現(xiàn)一個數(shù)量級的變化,應(yīng)加強(qiáng)支架分布集度.
[Abstract]:In order to improve the overall effect of "U" steel support in roadway, and to study the internal force distribution and stability of the support under partial load, it is beneficial to optimize the support distribution. Based on the engineering background of Linnanchang Mine, the distribution of axial force, shear force, bending moment and displacement along the heading direction of roadway is simulated by numerical analysis method. The results show that the axial force is the largest at the leg of the support, the minimum at the top, the shear force and bending moment at the top, the leg and the arch part of the area is larger, along the roadway direction, the axial force is relatively stable, and there is a gap in each excavation step. The shear force and bending moment of the support gradually decrease in the total excavation roadway, and the influence on the surrounding rock and the support is greater when the bias is 0.9 MPa, and the surrounding rock appears a large plastic range. There is an order of magnitude change in the first excavation step, and the distribution of the support should be strengthened.
【作者單位】： 中國礦業(yè)大學(xué)(北京)力學(xué)與建筑工程學(xué)院;山東科技大學(xué)礦業(yè)與安全工程學(xué)院;中國礦業(yè)大學(xué)(北京)煤炭資源與安全開采國家重點(diǎn)實驗室;安徽理工大學(xué)煤礦安全高效開采省部共建教育部重點(diǎn)實驗室;
【基金】：國家自然科學(xué)基金青年基金(51504257) 中國博士后科學(xué)基金(2014M550102) 煤礦安全高效開采省部共建教育部重點(diǎn)實驗室開放基金項目(JYBSYS2015109)
【分類號】：TD353

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