本文選題：千枚巖　切入點(diǎn)：三軸壓縮　出處：《工程地質(zhì)學(xué)報(bào)》2017年02期 　論文類型：期刊論文

【摘要】：利用MTS815程控伺服巖石力學(xué)試驗(yàn)系統(tǒng),對(duì)千枚巖進(jìn)行不同圍壓下的三軸壓縮試驗(yàn),研究圍壓對(duì)千枚巖變形破壞特征和能量演化特征的影響。結(jié)果表明:在低圍壓下,千枚巖破壞模式為張-剪復(fù)合型破壞,隨著圍壓升高,破壞模式轉(zhuǎn)變?yōu)榧羟衅茐?彈性應(yīng)變能曲線和耗散能曲線的交點(diǎn)k為能量分界點(diǎn),k之前表現(xiàn)為能量積聚,k之后表現(xiàn)為能量釋放;總能量與軸向應(yīng)變關(guān)系曲線在加載初期呈下凹曲線,能量增速升高,加載后期呈上凸曲線,能量增速降低;特征應(yīng)力點(diǎn)的總能量和儲(chǔ)能的彈性應(yīng)變能均隨圍壓的增大而增大;圍壓對(duì)巖石內(nèi)部裂紋擴(kuò)展和峰后能量釋放均有阻礙作用。
[Abstract]:The triaxial compression tests of phyllite under different confining pressures were carried out by using MTS815 program controlled servo rock mechanics test system. The effects of confining pressure on the deformation, failure and energy evolution characteristics of phyllite were studied. The results show that: under low confining pressure, The failure mode of phyllite is tension-shear composite failure, and with the increase of confining pressure, the failure mode changes to shear failure. The intersecting point k of elastic strain energy curve and dissipation energy curve shows energy accumulation and energy release before energy separation point k, the curve of total energy and axial strain relation shows concave curve at the beginning of loading, and the energy growth rate increases. At the later stage of loading, the curve is convex, the energy growth rate decreases, the total energy of characteristic stress point and the elastic strain energy of energy storage increase with the increase of confining pressure, and the confining pressure hinders the crack propagation and energy release after peak.
【作者單位】： 地質(zhì)災(zāi)害防治與地質(zhì)環(huán)境保護(hù)國(guó)家重點(diǎn)實(shí)驗(yàn)室(成都理工大學(xué));
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(41230635) 地質(zhì)災(zāi)害防治與地質(zhì)環(huán)境保護(hù)國(guó)家重點(diǎn)實(shí)驗(yàn)室課題(SKLGP2013Z004) 四川省教育廳項(xiàng)目(16ZA0095)資助
【分類號(hào)】：TU45
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本文編號(hào)：1611822