Experimental Study on Energy Evolution and Failure Characteristics of Rock–Coal–Rock Combination with Different Height Ratios

Pan, Bao; Yu, Weijian; Shen, Wenbing

doi:10.1007/s10706-020-01501-4

Cited by 15 publications

(7 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Liu et al 24 investigated the mechanical properties of coal in coal-rock assemblages, and the compressive strength of coal-rock specimens increased with increasing rock strength and decreased with increasing coal-rock height ratio. Pan et al 25 investigated the deformation characteristics and loading damage of coal-rock assemblages with different coal-rock height ratios and found that the uniaxial compressive strength of coal-rock assemblages increased with increasing coal-rock height. Chen et al 26 conducted experimental and numerical studies on the response of rock-coal, coal-rock and rock-coal-rock composite structures under triaxial compression.…”

Section: Introductionmentioning

confidence: 99%

Characterisation of strength and deformation characteristics of alkali-activated rice husk ash filler-assemblage perimeter rock

Zhao,

He,

Sun

et al. 2023

Sci Rep

View full text Add to dashboard Cite

In this study, the strength characteristics, deformation characteristics and damage characteristics of three kinds of specimens, namely, surrounding rock, cemented paste backfill (CPB) and a surrounding rock-CPB combination, were studied by uniaxial compression testing using rice husk ash and slag as cementing materials, and the mechanical properties of the combination specimens with different height ratios were also analyzed. The results showed that the surrounding rock specimens were the strongest, followed by the composite body, and the CPB was the weakest. The relationship between different height ratios of the assemblage and the cut line modulus was found according to the fitted curves. The CPB specimens and the surrounding rock specimens showed ductile damage, while the assemblage specimens showed brittle damage.

show abstract

Section: Introductionmentioning

confidence: 99%

Characterisation of strength and deformation characteristics of alkali-activated rice husk ash filler-assemblage perimeter rock

Zhao,

He,

Sun

et al. 2023

Sci Rep

View full text Add to dashboard Cite

show abstract

“…By analyzing the mechanical rock parameters of many engineering cases, it was established that the rock stress ratio and the elastic strain energy significantly influence the impact of ground pressure. Several scholars have utilized the coal-rock combination to conduct research, and the impact of changes in coal thickness on the strength and deformation characteristics of coal-rock combinations has been analyzed [9,10]. The results demonstrated that the strength of combinations is negatively correlated with changes in coal thickness.…”

Section: Introductionmentioning

confidence: 99%

Energy Accumulation Law of Different Forms of Coal–Rock Combinations

Li,

Zhang,

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

Coal–rock disasters are becoming more and more severe as the intensity of coal mining increases. Due to its destructive power and resulting extensive area damage, rock burst is among the most critical threats to coal mine safety. It results from the combined action of the coal and the rock when affected by the mining process. To this end, we used a combination of coal and rock to conduct our studies. Combining a uniaxial compression experiment with theoretical analysis, this work investigated how different lithologies and coal–rock height ratios affect the mechanical properties of this combination and the law governing energy accumulation. We determined the following: When the coal–rock height ratios are dissimilar, the peak strength and modulus of elasticity of the combination show a negative correlation with the coal thickness share, and the pre-peak energy accumulation and impact energy index of the combination is positively correlated with the coal thickness percentage. In combination with the same coal–rock height ratio, the peak strength, elastic modulus, pre-peak energy accumulation, and impact energy index all increase with increased rock strength and elastic modulus. The presence of a hard rock layer affects the accumulation of pre-peak energy. Based on the experimental analysis, a theoretical model was established, and the surrounding rock stress negatively correlates with the percentage of coal thickness; the energy stored in the surrounding rock is directly proportional to the coal in the zone. Therefore, we inferred that the stress distribution of the surrounding rock as coal thickness changes is abnormal; substantial energy accumulation can swiftly initiate dynamic disasters, such as rock bursts. This study has important reference significance for preventing and controlling rock bursts in areas where coal thickness changes.

show abstract

“…Yang et al [5] conducted uniaxial compression tests on coal, sandstone and three composite specimens using the RMT rock mechanics test system and acoustic emission real-time monitoring system, combining the evolution laws of fractal and acoustic emission signals, and investigated the crack extension and damage mechanism of the composite specimens. Bao Pan et al [6] studied the deformation characteristics and loading damage laws of coal-rock assemblages under different coal-rock height ratios based on uniaxial loading and uniaxial cyclic loading tests. Du and Wang et al [7] conducted conventional triaxial compression tests on gas-bearing coal, gas-bearing coal mudstone assemblage and gas-bearing coal sandstone assemblage using RLW-500G triaxial test system, and unloading tests on gas-bearing coal sandstone assemblage specimens to analyze the deformation and strength characteristics of different coal-rock assemblages and discuss their acoustic emission behaviors.…”

Section: Introductionmentioning

confidence: 99%

Failure energy evolution of coal-rock combination with different inclinations

Liu

Yang

et al. 2022

Preprint

View full text Add to dashboard Cite

In order to study the energy evolution characteristics and damage mechanism of coal-rock assemblages with different inclination angles in the process of deformation and damage under different circumferential pressures. The test results show that: the damage of the specimens is mainly caused by bevel shear damage and tensile damage; the deformation and damage of the coal rock assemblage are distributed as a negative exponential function of the inclination angle, and the change of the surrounding pressure has a significant effect on the energy; based on the brittleness index value of the coal rock assemblage, the evolution of the brittleness index and Based on the brittleness index values, the evolution law between the brittleness index and the inclination angle and the surrounding pressure of coal rock assemblage is explored, and the mechanism of the change of inclination angle in the deformation and damage of coal rock assemblage with different inclination angles on the plastic yielding degree, energy dissipation level, crack extension and fracture speed in the pre-peak stage is revealed.

show abstract

Experimental Study on Energy Evolution and Failure Characteristics of Rock–Coal–Rock Combination with Different Height Ratios

Cited by 15 publications

References 3 publications

Characterisation of strength and deformation characteristics of alkali-activated rice husk ash filler-assemblage perimeter rock

Characterisation of strength and deformation characteristics of alkali-activated rice husk ash filler-assemblage perimeter rock

Energy Accumulation Law of Different Forms of Coal–Rock Combinations

Failure energy evolution of coal-rock combination with different inclinations

Contact Info

Product

Resources

About