Results 21 to 30 of about 2,525 (166)

Investigation of fracture properties of mode I fracture in heat-treated granite. [PDF]

Sci Rep
The mode I fracture properties of granite under high-temperature conditions were investigated to reveal the influence of different heat treatment temperatures on the fracture toughness, crack propagation behavior, and brittle-ductile transition of granite.
Niu S, Wu J, Chen S, Zhao J.
europepmc   +4 more sources

Quantitative characterization of fracture surfaces of granite specimens under triaxial extension using SEM and deep learning

Journal of Materials Research and Technology
The mesoscopic failure mechanism of rock under triaxial extension (axial tension/unloading-tension in confining pressure) remained still unclear and required further investigation.
Zida Liu, Diyuan Li, Zong-Xian Zhang, Chenxi Zhang, Quanqi Zhu   +4 more
doaj   +1 more source

Experimental study on the breakdown mechanism of high temperature granite induced by liquid nitrogen fracturing: An implication to geothermal reservoirs

Heliyon, 2023
To reveal the breakdown mechanism of dry hot rock (HDR) induced by liquid nitrogen (LN) fracturing, the laboratory tests were performed on high temperature granite using specialized apparatus.
Chengzheng Cai, Zengxin Zou, Keda Ren, Zhixiang Tao, Yinrong Feng, Yugui Yang, Bo Wang   +6 more
doaj   +1 more source

The effect of heating rate on the fracture behavior of cracked straight-through Brazilian disc specimen

矿业科学学报
This study investigates the fracture characteristics and damage mechanism of granite after treatment under different heating rates. The cracked straight-through Brazilian disc(CSTBD)specimen was used for high-temperature treatment with four heating rates
XIAO Xiaodong, ZHOU Lei, LIANG Xian, LIANG Wangqian, LI Yao, WANG Haohan   +5 more
doaj   +1 more source

Experimental Investigation of Crack Extension Patterns in Hydraulic Fracturing with Shale, Sandstone and Granite Cores

Energies, 2016
Hydraulic fracturing is an important method of reservoir stimulation in the exploitation of geothermal resources, and conventional and unconventional oil and gas resources.
Jianming He, Chong Lin, Xiao Li, Xiaole Wan   +3 more
doaj   +1 more source

Genesis and development processes of fractures in granite: Petrographic indicators of hydrothermal alteration.

PLoS ONE, 2021
Biotites occur with varying degrees of alteration within a granite. This study analyzes the relationships among alteration indicators, areal microvoid fractions in chloritized biotite, and macroscopic fracture frequencies in the Toki granite, central ...
Takashi Yuguchi, Yuya Izumino, Eiji Sasao   +2 more
doaj   +1 more source

Characterisation of hydraulically-active fractures in a fractured granite aquifer

Water SA, 2015
In this study, the practical usefulness and fundamental applicability of a self-potential (SP) method for identifying the hydraulically-active fractures were evaluated by a comparison of SP methods with other geophysical logging methods and hydraulic tests.
Lee, Hang Bok, Kim, Byung-Woo
openaire   +4 more sources

Experimental and numerical study on permeability hysteresis of a single fracture subjected to loading and unloading of confining pressure

Yantu gongcheng xuebao
Groundwater flow in fractured rock mass mainly depends on the hydraulic conduction characteristics of fracture network, especially for low permeability rocks, such as granite.
WANG Xue 1, SUN Changlun 2, YU Long 1, ZOU Liangchao 3, ZHUANG Li 1
doaj   +1 more source

Influences of confining pressure and fracture inclination on mechanical behavior of granite

Yantu gongcheng xuebao
The mechanical behavior of host rock with fractures is crucial for the long-term stability and safety of a high-level radioactive waste geological disposal facility.
WANG Chunping 1, 2, LIU Jianfeng 3, LIU Jian 1, 2, WANG Lu 3, 4, XUE Fujun 3
doaj   +1 more source

Acoustic emission features and P-wave first-motion polarity of tensile fractures in the rock

工程科学学报, 2022
To investigate the acoustic emission (AE) characteristics of tensile fracture in the rock, an AE experiment of granite, marble, and red sandstone using an expanding agent for fracture generation was designed.
Xi-ling LIU, Qing-lin LIU, Kun DU, Xi-bing LI, Qin XIE   +4 more
doaj   +1 more source