厚砂土層斜井井壁應(yīng)力分布規(guī)律三維光彈性模型試驗(yàn)
[Abstract]:Based on the engineering background of a coal mine main inclined well crossing thick sand layer, the physical model test is designed, and the three-dimensional photoelastic stress freezing test method of inclined shaft wall is established. Three-dimensional experimental simulation of sidewall stress state of inclined well through thick sand layer with consideration of oblique dip angle is realized. The maximum shear stress isoline diagram obtained by photoelastic test of full-field maximum shear stress along with buried depth is combined with the model after stress freezing. The variation law of circumferential angle is analyzed. The results show that the inhomogeneity of stress level and stress distribution in horizontal slice of shaft wall is much greater than that in longitudinal section, and the stress concentration area of the maximum shear stress appears in the horizontal plane 鹵25 擄of the inner edge of the two sides of the shaft wall. The maximum shear stress at the top of the inclined shaft is greater than that at the bottom, and the longitudinal stress increases linearly with the increase of the depth of the inclined shaft wall, but the increasing speed of the stress corresponding to different circumferential angles varies greatly, resulting in different buried depth positions. There are differences in the magnitude and distribution of the stress inside the shaft wall.
【作者單位】: 中國(guó)礦業(yè)大學(xué)深部巖土力學(xué)與地下工程國(guó)家重點(diǎn)實(shí)驗(yàn)室;浙江工商大學(xué)技術(shù)與工程管理系;江蘇建筑職業(yè)技術(shù)學(xué)校能源與交通工程學(xué)院;
【基金】:國(guó)家自然科學(xué)基金資助項(xiàng)目(51104146) 國(guó)家高等學(xué)校學(xué)科創(chuàng)新引智計(jì)劃(111)資助項(xiàng)目(B14021)
【分類號(hào)】:TD265.32
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