Analysis of Characteristics of Roof Fall Collapse of Coal Mine in Qinghai Province, China

Ya-Jie Wang,Lin-Shuang Zhao,Ye-Shuang Xu

doi:10.3390/app12031184

Ya-Jie Wang, Lin-Shuang Zhao + Show 1 more

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https://doi.org/10.3390/app12031184

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Abstract

This paper presents the roof fall collapse of a coal mine that occurred, causing 20 deaths and 1 injury, in Qinghai Province, China, on 14 August 2021. After the primary investigation of this incident and a brief description of the rescue action undertaken, this report discussed the possible reasons behind this disaster. The fissure water and damaged rock mass are the dominant triggering factors of this incident. Little concern for risk assessment and monitoring systems is one of the main man-made mistakes. Consequently, the reflections and suggestions are put forward to reduce or prevent the occurrence of roof fall incidents in coal mines. The noteworthy actions that are necessary in coal mine projects are conducting risk assessments based on geological condition and building proper support systems for coal mines considering he situation in situ.

Highlights

Roof Fall Collapse of Coal Mine in the clean energies, such as wind, solar, and water, are booming in the modern age, coal is still the largest source of energy for generating electricity in the world.With the rapid development of megacities, the demand for coal resources is increasing.underground coal mines suffer many hidden hazards during the coal mining process, such as roof fall, gas explosion, surface subsidence, and so on [1,2,3]
On 14 August 2021, the roof fall collapse of a coal mine occurred in Haibei Prefecture of Qinghai Province, China
The accident was caused by the mixing of fissure water and coal ash in the upper part of the working face to form coal slime, which poured into the working face

Summary

Introduction

Underground coal mines suffer many hidden hazards during the coal mining process, such as roof fall, gas explosion, surface subsidence, and so on [1,2,3]. Some authors [1,5] reported that roof falls threaten the life of miners directly and have the potential to result in the loss of coal mine companies’ property, which includes damage to underground equipment, downtimes, etc. Some scholars [9,10,11] summarized the main contribution factors of the development of roof fall hazards, and these factors include geological uncertainty, stress change, mining condition, the surrounding environment, and enterprise safety management

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Conclusion