期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2018
卷号：199
期号：2
页码：022038
DOI：10.1088/1755-1315/199/2/022038
语种：English
出版社：IOP Publishing
摘要：The entire process of fracturing at different sections, were namely 1-1(wellhead), 2-2(well middle), 3-3(well bottom), was simulated to study the failure law of surrounding rock at different depths. The failure mechanics of borehole rock mass was analysed using Realistic Failure Process Analysis (RFPA) software. The results showed that as the depth of wells continues to deepen, the crack propagation was restrained relatively by inhomogeneous materials in rock mass. In addition, with the increase of inhomogeneous materials in the surrounding rock, the brittle of rock and peak strength of the fracture gradually increase. The entire process of rock failure was corresponded to three stages, namely damage initiation, restriction propagation and rock failure. As the depth of wells deepens, the steps in damage initiation gradually decreased compared with the steps in restriction propagation stage. As the confining pressure continues to increase, the accumulated energies in the rock mass reached the peak strength of the crack, it would immediately violently crack.
Loading...
