Results 41 to 50 of about 2,525 (166)

Experimental investigation on failure mode and fracture characteristic of rock samples induced by laser irradiation

International Journal of Mining Science and Technology
For hard rock cracking induced by laser irradiation, the failure modes and fracture characteristics among rocks of different types and sizes are still unclear.
Dongxu Yu, Yijiang Wang, Shuchen Li, Zongheng Jiang, Jianzhou Wang   +4 more
doaj   +1 more source

An integrated DIC and CPG investigation of the model-I fracture features for granites after cyclic heating-cooling treatments

Meitan xuebao
The thermo-mechanical properties of deep reservoir rocks, especially the damage and failure characteristics under heating-cooling cycles, are of great importance to the stability analysis of well wall and the evaluation of geothermal extraction ...
Qiuhong WU, Yuhao XIA, Yanlin ZHAO, Lei WENG, Shiming WANG, Gan FENG   +5 more
doaj   +1 more source

Predictions of macro-scale fracture geometries from acoustic emission point cloud data in a hydraulic fracturing experiment

Journal of Petroleum Exploration and Production Technology, 2018
Observations of laboratory fracture testing by means of acoustic emission (AE) can provide a wealth of information regarding the fracturing process and the subsequent damage of the material or structure under load.
Jesse Hampton, Marte Gutierrez, Luke Frash   +2 more
doaj   +1 more source

Mechanical properties and damage characterization of cracked granite after cyclic temperature action

Scientific Reports
Due to the unique geographical environment of the plateau, large-scale damage and destruction of fractured surrounding rock often occur during geotechnical engineering construction as a result of high-temperature cycles.
Xiankai Bao, Lingyu Wang, Guangqin Cui, Jianlong Qiao, Baolong Tian, Shunjia Huang, Lizhi Wang   +6 more
doaj   +1 more source

Physio-Mechanical Properties and Meso-Scale Damage Mechanism of Granite Under Thermal Shock

Energies
Clarifying the differential effects of temperature gradient and temperature change rate on the evolution of rock fractures and damage mechanism under thermal shock is of great significance for the development and utilization of deep geothermal resources.
Kai Gao, Jiamin Wang, Chi Liu, Pengyu Mu, Yun Wu   +4 more
doaj   +1 more source

Mechanical properties and fracture surface roughness of thermally damaged granite under dynamic splitting

Deep Underground Science and Engineering
In order to understand the mechanical properties and the fracture surface roughness characteristics of thermally damaged granite under dynamic splitting, dynamic Brazilian splitting tests were conducted on granite samples after thermal treatment at 25 ...
Yijin Qian, Peng Jia, Songze Mao, Jialiang Lu   +3 more
doaj   +1 more source

Impact of Rock Elastic Properties on Fracture Geometry in Potential Enhanced Geothermal Systems in Poland

Energies
In hot dry rocks (HDRs), hydraulic fracturing is necessary to create enhanced geothermal systems (EGSs) and optimize flow rates between injection and production wells.
Rafał Moska, Krzysztof Labus, Piotr Kasza   +2 more
doaj   +1 more source

Mechanical and microstructural properties of Gonghe granite for enhanced geothermal systems: Thermal effects and energy evolution

Journal of Rock Mechanics and Geotechnical Engineering
Investigating the mechanical behavior and microstructural evolution of granite under high temperatures is crucial for optimizing fracturing strategies and ensuring reservoir sustainability in enhanced geothermal systems (EGS) at the Qiabuqia geothermal ...
Zhouqian Wu, Dongming Zhang, Yajin Liang, Shifeng He, Heping Xie, Minghui Li   +5 more
doaj   +1 more source

Experimental Study on the Evolution of Fracture Aperture of Single-Fracture Granite during Liquid Nitrogen Cold Shock Cycling

Geofluids
Fractures in hot dry rock (HDR) reservoirs are the locations where heating fluid flows exchange heat with the HDR matrix. Cold shock with liquid nitrogen is one method for stimulating cracks. This study investigates the evolution law of fracture aperture
Haiping Niu, Weidong Yu
doaj   +1 more source

Thermal and mechanical properties of fracture-filled granite with different structural forms under high temperature and high pressure

Meitan xuebao
The reservoir of deep hot dry rock (HDR) geothermal energy is not intact rock mass, which includes a large number of fractures induced by geological tectonic movement. The tectonic fractures are subsequently filled by hydrothermal fluid.
Weitao YIN, Zijun FENG
doaj   +1 more source