Mechanism and prevention of typical coal burst disaster at the working face of Hongqinghe coal mine

Liu Wenchao; Zhao Yixin

doi:10.19606/j.cnki.jmst.2023.06.007

Volume 8 Issue 6

Dec. 2023

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Liu Wenchao, Zhao Yixin. Mechanism and prevention of typical coal burst disaster at the working face of Hongqinghe coal mine[J]. Journal of Mining Science and Technology, 2023, 8(6): 803-816. doi: 10.19606/j.cnki.jmst.2023.06.007

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Mechanism and prevention of typical coal burst disaster at the working face of Hongqinghe coal mine

doi: 10.19606/j.cnki.jmst.2023.06.007

Liu Wenchao,
Zhao Yixin^,

School of Energy and Mining Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China
Key Laboratory of Disaster Prevention and Disposal in Coal Mining, Ministry of Emergency Management, Beijing 100083, China
Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources, China University of Mining and Technology-Beijing, Beijing 100083, China

Received Date: 2023-06-02
Rev Recd Date: 2023-09-15
Publish Date: 2023-12-31

Abstract

Abstract

This study aims to tackle the problem of frequent coal-rock dynamic events caused by local stress concentration in deep mining working face under high static stress environment. Specifically, by taking the deep working face of Hongqinghe Mine located in Xinjie Mining Area as an example for analysisthis paper investigates the geological conditions of No. 3^-1coal seam that are affected by the mining method and the coal rock dynamic disaster events occurred during mining; utilizes numerical simulation to simulate the mining stress field and energy field of the stope; analyzes the potential coal burst instability area and mechanism of coal burst gestation and catastrophe in the stope during the mining of the No. 3^-1103 working face; probes into the sources of catastrophic stress and influencing factors of coal-rock disasters in dangerous areas, puts forward targeted prevention and control measures. Results show that: ① the roof strata structure, goaf and coal pillar are the key factors influencing coal burst in the stope during the mining of the No. 3^-1103 working face; ② the simulation results indicatethe location and characteristics of the coal burst instability area in the stope of the No. 3^-1103 working faces, as well as the simulation outlines 5 strong coal burst areas and 11 medium coal burst areas presented in the stope; ③ Measures are proposed for coal burst during mining from the perspective of cutting off the dynamic load source, reducing static load stress concentration, and blocking the transmission of high concentration stress. Detailed measures include implementing multi-source prevention and control in areas with high static or high static+dynamic loads, implement pre-pressure off-load measures prior to mining, and local risk relief and coal burst prevention and reduction treatments during mining.
- deep working face,
- coal burst,
- hard thick roof,
- strain energy density,
- high static,
- dynamic load

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Mechanism and prevention of typical coal burst disaster at the working face of Hongqinghe coal mine

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