【摘要】：考慮不同巷道埋深對(duì)支護(hù)壓力的影響,采用廣義Hoek-Brown屈服準(zhǔn)則對(duì)圓形巷道圍巖進(jìn)行彈塑性力學(xué)分析。利用在彈塑交界處應(yīng)力連續(xù)的條件及巷道周邊的應(yīng)力邊界條件,得到了塑性區(qū)的應(yīng)力和巷道的支護(hù)壓力與原巖應(yīng)力之間的解析式。研究表明:塑性區(qū)的應(yīng)力和巷道的支護(hù)壓力不僅與本身的力學(xué)特性有關(guān),而且還與原巖應(yīng)力有關(guān);并針對(duì)質(zhì)量較差的軟巖,分析了在不同支護(hù)壓力條件下巷道所能承受的最大原巖應(yīng)力及其所對(duì)應(yīng)的最大的埋深。分析結(jié)果表明:支護(hù)壓力與原巖應(yīng)力及其所對(duì)應(yīng)的巷道埋深存在明顯的線性關(guān)系。
[Abstract]:Considering the influence of different buried depth of roadway on supporting pressure, the elastoplastic mechanics analysis of circular roadway surrounding rock is carried out by using generalized Hoek-Brown yield criterion. By using the stress continuity condition at the elastic-plastic junction and the stress boundary condition around the roadway, the analytical formula between the stress in the plastic zone and the support pressure of the roadway and the stress in the original rock is obtained. The results show that the stress of plastic zone and the supporting pressure of roadway are not only related to the mechanical properties of the rock itself, but also to the stress of the original rock, and to the soft rock with poor quality. The maximum original rock stress and the corresponding maximum buried depth of roadway under different supporting pressure are analyzed. The results show that there is an obvious linear relationship between the support pressure and the stress of the original rock and the corresponding buried depth of the roadway.
【作者單位】： 安徽理工大學(xué)力學(xué)與光電物理學(xué)院;安徽理工大學(xué)土木建筑學(xué)院;
【分類號(hào)】：TD322

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