Related Experiment Video
Updated: Jun 25, 2025

A Uniaxial Compression Experiment with CO2-Bearing Coal Using a Visualized and Constant-Volume Gas-Solid Coupling Test System
Published on: June 12, 2019
Dynamic mechanical response and failure characteristics of coal and rock under saltwater immersion conditions
Xiaoyuan Sun1,2, Kai Liu3, Tingxu Jin1
1College of Safety and Emergency Management Engineering, Taiyuan University of Science and Technology, Taiyuan, 030024, Shanxi, People's Republic of China.
Abstract:
The stability of coal and rock masses in water-rich mines is affected by both mine water erosion and dynamic disturbances. Thus, it is necessary to study the dynamic mechanical response and failure characteristics of coal and rock under the combination of saltwater and a high strain rate. To this end, a split Hopkinson pressure bar device was employed to investigate the effects of impact velocity, water content, and immersion liquid on the dynamic mechanical behaviours of coal and rock. The results revealed that the weakening effect of saltwater on the dynamic mechanical properties of coal and rock is much greater than that of distilled water. With increasing moisture content, the dynamic compressive strength of the coal specimens decreases monotonically, while that of the rock shows a trend of first increasing and then decreasing. The failure process and destruction of coal and rock are comprehensively affected by both the external impact load and the physical and mechanical properties of the material. The degree of damage of the coal and rock specimens increases with increasing impact velocity and water content. Moreover, the influence of various factors on the impact fracture mechanism of coal and rock under saltwater immersion conditions was revealed. These findings are highly important for the design and maintenance of underground coal and rock building structures.
More Related Videos
10:18Dynamic Pore-scale Reservoir-condition Imaging of Reaction in Carbonates Using Synchrotron Fast Tomography
Published on: February 21, 2017
12:18Pore-scale Imaging and Characterization of Hydrocarbon Reservoir Rock Wettability at Subsurface Conditions Using X-ray Microtomography
Published on: October 21, 2018
Related Concept Videos
Unsoundness of Aggregate due to Volume Change
Effect of Sea Water on Concrete
Concrete in areas between tide marks,...
Responses to Salt Stress
Abrasion Resistance of Concrete
One such test is the revolving disc test, where three plates...
Testing Water Quality
Responses to Drought and Flooding