What does this research mean for the field?

Small-caliber roadways and low roadway heights impede the release of outburst energy and induce fluctuations in energy release during coal-gas outbursts. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

This research investigates how the size and shape of pressure-relief roadways affect coal-gas outburst dynamics.

March 10, 2026Case Studies in Thermal EngineeringOpen Access

The size effect of pressure-relief roadway on coal-gas outburst dynamics

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Authors

MZM. J. ZhangNorth University of China TYTingyu YinNorth University of China KWKang WangZhejiang International Studies University

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Implication

Outburst experiments reveal how roadway size influences gas release in coal mining accidents, suggesting design improvements.

Key Points

This research investigates how the size and shape of pressure-relief roadways affect coal-gas outburst dynamics.
Conducted experiments with varying roadway sizes and shapes.
Measured pressure potential energy release rate (PPERR) during outbursts.
Analyzed the effects of caliber, cross-sectional area, shape, and similarity ratio.
Assessed dynamic behavior of two-phase flows pertained to roadway characteristics.
Small-caliber roadways hinder energy release, causing fluctuations.
Direct release without roadway increases PPERR by 5.62%.
Outburst velocity remains consistent across shapes with the same cross-section, but PPERR differs.
The square shape was found to have the highest PPERR, followed by rectangular and circular.
An optimal similarity ratio above 0.1 is recommended for effective energy release.

Cite This Study

Zhang et al. (2026) studied this question.

synapsesocial.com/papers/69af95de70916d39fea4de8e https://doi.org/10.1016/j.csite.2026.107917

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The size effect of pressure-relief roadway on coal-gas outburst dynamics

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Implication

Key Points

Cite This Study

The size effect of pressure-relief roadway on coal-gas outburst dynamics

Discussion

Member takes

Implication

Key Points

Cite This Study

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