發(fā)布時(shí)間：2018-06-28 08:19

  本文選題：壓溶 + 微裂隙愈合��； 參考：《中國石油大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年05期

【摘要】：壓溶蠕變可能是間震期斷層帶的主導(dǎo)變形機(jī)制之一,開展壓溶蠕變及其對(duì)微裂隙愈合的實(shí)驗(yàn)研究對(duì)理解強(qiáng)震孕育和發(fā)生具有重要意義。以Carrara大理巖為樣品,開展相同圍壓(800 MPa)和應(yīng)變速率(1×10-7s-1)、不同溫度(300、400、500℃)下大理巖壓溶蠕變實(shí)驗(yàn)。利用掃描電鏡研究實(shí)驗(yàn)變形樣品的微觀結(jié)構(gòu)與變形機(jī)制,利用傅里葉變換紅外吸收光譜測試實(shí)驗(yàn)樣品的含水量。實(shí)驗(yàn)結(jié)果表明:在300℃條件下,碎裂和壓溶是樣品主要變形機(jī)制,400℃時(shí)樣品同時(shí)出現(xiàn)碎裂、壓溶和局部動(dòng)態(tài)重結(jié)晶,500℃時(shí)樣品主要變形機(jī)制為壓溶和動(dòng)態(tài)重結(jié)晶。壓溶主要出現(xiàn)在樣品強(qiáng)變形區(qū)域,粒度減小與含水量增加促進(jìn)了壓溶發(fā)生,而壓溶引起孔隙和微裂隙愈合。
[Abstract]:The pressure solution creep may be one of the dominant deformation mechanisms of the fault zone during the interseismic period. The experimental study on the pressure solution creep and its healing of microcracks is of great significance in understanding the preparation and occurrence of strong earthquakes. Using Carrara marble as sample, the compressive solution creep experiments of marble at the same confining pressure (800MPa) and strain rate (1 脳 10-7s-1) at different temperatures (300400500 鈩，

本文編號(hào)：2077344