本文選題：巖石力學(xué) + 橢圓形孔洞　； 參考：《中國礦業(yè)大學(xué)學(xué)報(bào)》2016年06期

【摘要】：通過對(duì)含預(yù)制橢圓形孔洞板狀砂巖試樣進(jìn)行單軸壓縮試驗(yàn),研究了橢圓長軸與短軸之比k及石膏充填作用對(duì)巖樣強(qiáng)度和破壞特征的影響規(guī)律.研究表明,含孔洞巖樣的強(qiáng)度和變形參數(shù)相對(duì)于完整試樣均有不同程度的降低,而石膏充填后試樣的峰值強(qiáng)度和彈性模量均有所提高,但峰值應(yīng)變無明顯變化規(guī)律;無論充填與否,試樣峰值強(qiáng)度均隨著k值的增加均呈指數(shù)形式降低;充填作用對(duì)巖樣宏觀破壞模式無明顯影響,巖樣最終均以剪切破壞為主,主破裂面沿對(duì)角線分布;相對(duì)于無充填的巖樣,石膏充填后的巖樣破壞時(shí)宏觀裂隙數(shù)目增多,破壞程度加劇.
[Abstract]:Based on uniaxial compression tests of slate sandstone samples with prefabricated elliptical voids, the effects of the ratio k of elliptical long axis to short axis and the effect of gypsum filling on the strength and failure characteristics of rock samples are studied. The results show that the strength and deformation parameters of porous rock samples are lower than that of intact samples, but the peak strength and elastic modulus of gypsum filled samples are increased, but the peak strain has no obvious change. Whether filled or not, the peak strength of the specimen decreases exponentially with the increase of k value, and the filling has no obvious effect on the macroscopic failure mode of rock sample, and the main fracture surface is distributed diagonally. Compared with the unfilled rock samples, the number of macroscopic fractures increases and the degree of failure intensifies during the failure of gypsum filled rock samples.
【作者單位】： 中國礦業(yè)大學(xué)深部巖土力學(xué)與地下工程國家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(973)項(xiàng)目(2013CB036003) 國家自然科學(xué)基金項(xiàng)目(51374198,51134001)
【分類號(hào)】：TU45

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