本文選題：膏體 + 溫度�。� 參考：《工程科學(xué)學(xué)報(bào)》2017年01期

【摘要】：膏體充填料到達(dá)采場(chǎng)初始溫度不同是礦山存在的普遍現(xiàn)象,不同初始溫度條件下膏體力學(xué)特性及應(yīng)力-應(yīng)變關(guān)系直接影響到礦山采充周期及相鄰采場(chǎng)開(kāi)采時(shí)貧化指標(biāo).通過(guò)對(duì)初始溫度為2、20、35和50℃的硬化膏體進(jìn)行單軸抗壓強(qiáng)度試驗(yàn),獲得不同初始溫度下充填體應(yīng)力-應(yīng)變演化曲線.根據(jù)理論推導(dǎo)和試驗(yàn)結(jié)果,建立了不同初始溫度下膏體損傷本構(gòu)模型,通過(guò)本構(gòu)模型參數(shù)回歸,提出膏體溫度-時(shí)間耦合損傷本構(gòu)模型.最后,采用Comsol數(shù)值模擬軟件,將溫度-時(shí)間耦合損傷本構(gòu)模型嵌入solid mechanics模塊,對(duì)單軸抗壓試驗(yàn)進(jìn)行數(shù)值模擬,模擬應(yīng)力-應(yīng)變曲線與試驗(yàn)結(jié)果較為吻合,驗(yàn)證了所提出本構(gòu)模型的可靠性.
[Abstract]:Different initial temperature of paste filling material to the stope is a common phenomenon in mines. Under different initial temperatures, the mechanical properties of paste and the stress-strain relationship directly affect the mining cycle and dilution index of adjacent stope. The stress-strain evolution curves were obtained by uniaxial compressive strength tests on hardened paste with initial temperatures of 2 ~ 20 ~ 35 鈩，

本文編號(hào)：2081553