Study on the Method of Pressure Relief and Energy Absorption for Protecting Roadway Under Thick and Hard Roof

Fu, Qiang; Yang, Jun; Song, Hongxu; Wu, Xing; Liu, Yuxuan; Wei, Xingjian

doi:10.1007/s00603-023-03447-4

Cited by 9 publications

(2 citation statements)

References 25 publications

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“…The synergy of these methods enhances the predictive capabilities for rockburst occurrences. Meanwhile, rock mass control involves strategies like local pressure relief [16][17][18][19][20] and reinforcement of the surrounding rock [21,22]. Among these, borehole pressure relief technology [23][24][25] is particularly effective in stress redistribution within coal and rock masses in high-stress areas, due to its quick results, cost-effectiveness, and ease of application.…”

Section: Introductionmentioning

confidence: 99%

Study on Dynamic Loading Characteristics of Rock Containing Holes

Zang,

Li,

Chen

et al. 2024

Applied Sciences

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Accurately characterizing the mechanical behavior and fracture mechanisms of rock containing holes under dynamic loads is essential for ensuring the stability of underground rock structures. In this study, to enhance the understanding of the fracture processes in rock specimens with cavities subjected to dynamic impacts, experimental and numerical studies focusing on the influence of borehole geometry and strain rate are conducted. The results reveal that the strain rate affects the specimens’ dynamic mechanical strength and peak strain. However, the degree of such influence diminishes as the borehole diameter increases in specimens containing two holes. Fractures that lead to failure are primarily initiated at the axial and radial edges of the holes, the specimen extremities, and around the rock bridges in specimens with dual cavities, indicating significant stress concentration zones within the stress field distribution for specimens with a single hole. Further analysis using displacement field diagrams confirms that shear-induced fractures are the predominant cause of failure across all specimens. These findings provide critical insights for developing borehole pressure relief technology to protect against the risks of deep dynamic impacts.

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Section: Introductionmentioning

confidence: 99%

Study on Dynamic Loading Characteristics of Rock Containing Holes

Zang,

Li,

Chen

et al. 2024

Applied Sciences

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“…The main cause of triggering dynamic disasters is the bending elasticity and sudden breaking induced dynamic disturbances generated by the large-scale overhanging of the hard roof 7 , 8 . Fu et al 9 employed theoretical analysis to establish a model of roof structure, revealing that as the thickness and strength of the hard roof increase, the cantilever length of the overlying roof in goaf also increases. Yang et al 10 and Zuo et al 11 analyzed the stress distribution pattern of the roof based on the medium-thick plate theory, proposing the break model of the hard roof and its mechanical criteria.…”

Section: Introductionmentioning

confidence: 99%

Study on the dynamic response and roadways stability during mining under the disturbance of hard roof break

Peng,

Chang,

Dechuan

et al. 2024

Sci Rep

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Under the condition that the working face was directly covered with hard roof, the abrupt breaking of hard roof release significant amount of energy, thus prone to triggering dynamic disasters such as roadway instability or rockburst. This paper based on the engineering background of the Xieqiao Coal Mine's 11,618 working face, a numerical simulation method was put forward to study the dynamic response of roadway under the disturbance of hard roof breaking and proposed an evaluation index IC for roadway stability. Research indicates that the elastic energy released during the periodic weighting of the hard roof is higher than that released during the first weighting. Under the dynamic disturbance caused by hard roof breaking, the peak stresses of the roadway was slight decreased, accompanied by a significant increase in the range of stress concentration and plastic zone expansion. Roadway deformation patterns are significantly influenced by hard roof breaking, with noticeable increases in deformation on the roof and right side. During the period of hard roof breaking, the possibility of instability of the roadway increase significantly due to the disturbance caused by the dynamic load. The research results reveal the instability mechanism of roadway under the condition of hard roof, and provide a more reliable basis for evaluating the stability of roadway.

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Effect of Roof Cutting Technology on Broken Roof Rock Bulking and Abutment Stress Distribution: A Physical Model Test

Yang,

Zhang

et al. 2024

Rock Mech Rock Eng

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Study on the Method of Pressure Relief and Energy Absorption for Protecting Roadway Under Thick and Hard Roof

Cited by 9 publications

References 25 publications

Study on Dynamic Loading Characteristics of Rock Containing Holes

Study on Dynamic Loading Characteristics of Rock Containing Holes

Study on the dynamic response and roadways stability during mining under the disturbance of hard roof break

Effect of Roof Cutting Technology on Broken Roof Rock Bulking and Abutment Stress Distribution: A Physical Model Test

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