AI Article Synopsis
- The study investigates how varying confining pressures and inclination angles affect the energy characteristics and damage mechanisms of coal-rock combinations.
- It examines the relationship between brittleness indexes, inclination angles, and confining pressures, revealing how these factors influence plastic yielding, energy dissipation, and crack behavior before peak damage occurs.
- The research concludes that damage in composite specimens primarily results from oblique shear and tensile factors, with energy distribution following a negative exponential function relative to inclination angle, significantly influenced by confining pressure changes.
Article Abstract
In this paper, in the deformation and damage process under different confining pressures, the energy evolution characteristics and damage mechanism of coal-rock combinations with different inclination angles are studied. Based on the brittleness indexes of coal rock combinations, the evolution rules between brittleness indexes and the inclination are explored, as well as the confining pressure of coal rock combinations; then, the influence mechanism of the inclination angle of coal rock combinations on the plastic yielding degree, energy dissipation level, crack extension and fracture speed in the pre-peak stage is revealed. The composite specimens are mainly damaged due to oblique shear and accompanied by tensile damage; In the deformation and damage, various energies of coal rock composites are distributed as a negative exponential function of the inclination angle, which is significantly affected by the change of the confining pressure.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9663588 | PMC |
| http://dx.doi.org/10.1038/s41598-022-23813-6 | DOI Listing |
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