Main Roof Breakage and Vibration Induced Coal Burst Occurring in Longwall Roadways

Ma, Shuangwen; Cao, Chen; Hui, Qianjia

doi:10.1155/2021/4982522

Cited by 3 publications

(2 citation statements)

References 30 publications

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“…However, due to the unique nature of the mine structure, mine pressure manifestations still occur frequently. It is urgent to analyze the infuencing factors of rockbursts and propose targeted control technologies [19,20]. Terefore, according to engineering experience and statistical judgment, based on the "Detailed Rules for the Prevention and Control of Coal Mine Rockburst" and the "Interim Measures for the Appraisal of Rockburst Mines" of China, this section frst analyzes the infuencing factors of rockburst during the excavation of the main roadway in Xinzhuang Coal Mine.…”

Section: Analysis Of Comprehensive Disaster Causing Factorsmentioning

confidence: 99%

Study on Mechanism and Main Influencing Factors of Rockburst under Complex Conditions of Hard and Deep Overburden

Xingen,

Jun,

Qinghai

et al. 2023

Shock and Vibration

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Xinzhuang Coal Mine is a typical kilometer-deep rockburst mine in the Ningzheng mining area of China Huaneng Group, which is still in the capital construction period. At present, there are a few studies on the rockburst mechanism and prevention of this mine. In order to explore the occurrence mechanism and main influencing factors of rockburst under the complex geological conditions of large buried depth, thick topsoil, and hard overburden in Xinzhuang Coal Mine, this paper, based on the analysis of the basic geological data of the mine, deeply explores the comprehensive disaster factors of Xinzhuang Coal Mine; then, uses the analytic hierarchy process to carry out quantitative analysis of each disaster factor, and finally, it obtains the impact type and occurrence mechanism of the mine. Through research, it is found that the main disaster factors of Xinzhuang Coal Mine are mining depth, coal seam thickness, coal seam thickness change, tectonic stress field, hard overburden, roadway layout, bottom coal reservation, and tunneling activities. The key to the process of the rockburst disaster in Xinzhuang Coal Mine is the superimposed effect of static and dynamic loads on the roadway surrounding the rock system. The potential rockburst type during excavation and mining is the “high static and dynamic load disturbance” type.

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Section: Analysis Of Comprehensive Disaster Causing Factorsmentioning

confidence: 99%

Study on Mechanism and Main Influencing Factors of Rockburst under Complex Conditions of Hard and Deep Overburden

Xingen,

Jun,

Qinghai

et al. 2023

Shock and Vibration

View full text Add to dashboard Cite

show abstract

“…When a small disturbance acted on the coal seam, the coal seam could slide with the roof, which caused coal seam impact. In subsequent research, based on the elastic foundation theory, Ma et al 19 established a nite elastic beam model to analyze the impact of hard roof on a rock burst occurring in a longwall mining roadway.…”

Section: Introductionmentioning

confidence: 99%

Research on the causal mechanism of a rock-burst accident in a longwall roadway and its prevention measures

Chen

Zhang

Cao

et al. 2023

Preprint

Self Cite

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Based on the characteristics of the disaster and the geo-conditions at the scene, this study analyzed the occurrence mechanism of a serious rock-burst accident occurred in Tangshan Coal Mine, China. Ground stress measurement shows that the mine is in high ground stress area dominated by horizontal tectonic stress. Laboratory testing showed that the coal was a hard seam over-bedded by a thick and hard roof stratum. The calculation results showed that the accident occurred in the roof rebounding area. It is proposed that the hard roof and the hard coal seam formed a seesaw structure around the working face. The vertical pressure relief caused the rib coal mass losing its clamping forces from the roof and floor, rushing into the roadway, resulting in rock-burst accident. Based on the causality mechanism of the rock-burst disaster developed in this study, pertinent coal bump prevention measures have been undertaken in practice. Large-diameter boreholes were drilled to eliminate the pivot effect of the seam. Roof blasting was undertaken preventing the roof from forming a seesaw plank. This study developed a new causality mechanism of rock burst for coal mines with hard roof and hard seam geo-conditions.

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Research on the causal mechanism of a rock burst accident in a longwall roadway and its prevention measures

Chen,

Zhang,

Cao

et al. 2023

Sci Rep

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Based on the disaster characteristics and the geo-conditions at the scene, in this study, the occurrence mechanism of a serious rock burst accident that occurred in the Tangshan Coal Mine, China, was analysed. Ground stress measurements showed that the mine is in a high ground stress area dominated by horizontal tectonic stress around 33 MPa. Laboratory testing revealed that the coal was a hard seam of 8.3 MPa over bedded by a thick and hard roof stratum with uniaxial compressive strength of 66 MPa. The calculation results indicated that the accident occurred in the roof rebounding area. It is proposed that the hard roof and the hard coal seam formed a seesaw structure around the working face. The vertical pressure relief caused the rib coal mass to lose its clamping forces from the roof and floor and rush into the roadway, resulting in a rock burst accident. Based on the causality mechanism of the rock burst disaster developed in this study, pertinent coal bump prevention measures have been undertaken in practice. Large-diameter boreholes were drilled to eliminate the pivot effect of the seam. Roof blasting was undertaken to prevent the roof from forming a seesaw plank. To summarize, a new causality mechanism for rock burst in coal mines under hard roof and hard seam geo-conditions was developed.

show abstract

Main Roof Breakage and Vibration Induced Coal Burst Occurring in Longwall Roadways

Cited by 3 publications

References 30 publications

Study on Mechanism and Main Influencing Factors of Rockburst under Complex Conditions of Hard and Deep Overburden

Study on Mechanism and Main Influencing Factors of Rockburst under Complex Conditions of Hard and Deep Overburden

Research on the causal mechanism of a rock-burst accident in a longwall roadway and its prevention measures

Research on the causal mechanism of a rock burst accident in a longwall roadway and its prevention measures

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