Pillar Burst Assessment Based on Large-scale Numerical Modeling

Ahmed, Samar S.; Heib, Marwan Al; Gunzburger, Yann; Renaud, Vincent

doi:10.1016/j.proeng.2017.05.170

Cited by 12 publications

(4 citation statements)

References 3 publications

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“…At the beginning of this century, South Africa carried out efficient mining of deep 3 ~ 5 km gold mines and studied the problems of rockbursts and high temperatures induced by mining (Grodner 2001). Rockbursts of varying intensity and impact have also occurred in mines in Africa, Australia, Canada, China, Chile, Korea, Norway, Russia, Sweden, and the United States (Ahmed et al 2017). Rockburst disasters seriously endanger the safety of personnel and equipment in mines and tunnels.…”

Section: Phenomenon and Occurrence Conditions Of Rockburstmentioning

confidence: 99%

Occurrence mechanism and prevention technology of rockburst, coal bump and mine earthquake in deep mining

Du,

Bi,

Khandelwal

et al. 2024

Geomech. Geophys. Geo-energ. Geo-resour.

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Rockburst, coal bump, and mine earthquake are the most important dynamic disaster phenomena in deep mining. This paper summarizes the differences and connections between rockburst, coal bumps and mine earthquakes in terms of definition, mechanism, phenomenon, evaluation index, etc. The definition and evolution progress of the three disaster categories are summarized, as well as the monitoring, early warning, and prevention measures are also presented. Firstly, by combining theoretical research with specific technologies and engineering field cases, the main categories and failure mechanisms of rockburst, coal bumps and mine earthquakes are introduced. Then, the evaluation indexes of coal bump and mine earthquake are summarized, and a new evaluation index of rockburst is given. Finally, the characteristics of monitoring, early warning technologies and prevention methods of rockburst, coal bumps, and mine earthquakes are discussed in technology and application. At last, the future directions of rockburst, coal bump and mine earthquake are put forward.

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Section: Phenomenon and Occurrence Conditions Of Rockburstmentioning

confidence: 99%

Occurrence mechanism and prevention technology of rockburst, coal bump and mine earthquake in deep mining

Du,

Bi,

Khandelwal

et al. 2024

Geomech. Geophys. Geo-energ. Geo-resour.

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“…Li et al (2015), He et al (2017), and Wang et al (2020) proposed a static and dynamic stresses superpositionbased risk evaluation method of coal burst to pre-evaluate coal burst risk. Ahmed et al (2017) proposed the Burst Potential Index (BPI) to estimate pillar burst tendency based on the energy storage rate (ESR). Shen et al (2017) stated that the energy density risk index (EDRI) could more accurately reflect the potential coal burst distribution and be used in multi-seam mining.…”

Section: Introductionmentioning

confidence: 99%

A Prediction Method of Coal Burst Based on Analytic Hierarchy Process and Fuzzy Comprehensive Evaluation

Zhu

Han

2022

Front. Earth Sci.

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Coal burst has become a worldwide problem that needs to be solved urgently for the sake of coal mine safety production due to its complicated triggering mechanisms and numerous influencing factors. The risk assessment of coal burst disasters is particularly critical. In this work, 15 factors affecting coal burst occurrence are selected from the perspectives of geodynamic environment and geological and mining conditions, and the influence mechanism of each factor on coal bursts is analyzed. An evaluation index system of coal burst risk is put forward. A hierarchical model of coal burst prediction is established, and the weight of each influencing factor to coal burst risk is calculated. Based on the fuzzy comprehensive evaluation method, a coal burst prediction model is established, which can scientifically decompose and simplify the complicated problem and make coal burst prediction and prevention more pertinent and effective. The model is applied to assess the coal burst risk level of a coal mine in Shanxi Province, and the evaluation result is consistent with practical situations. This method considers the influencing factors comprehensively and determines the weight of each factor scientifically compared with other forecasting methods.

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“…The risk of coal burst can be mitigated by optimizing mine designs and extraction parameters. It is reported that a suitable pillar design can significantly reduce coal burst risks [12,13]. The longwall retreat speed also seems to impact the risk of coal burst [14].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Overburden Deformation and Subsidence Behavior in a Kilometer Deep Longwall Mine

Khanal

Zhu

et al. 2022

Minerals

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A thorough understanding of mining-induced overburden deformation characteristics and the associated stress redistributions are essential to effectively manage complex safety and environmental issues that arise from underground mining. This is particular for mining in deep environments. This paper presents a numerical modelling study on a kilometer-deep longwall coal mine where a thick sandstone aquifer is situated approximately 200 m above the working seam. The mine adopts a special mine layout with narrow and wide pillars between longwalls and areas to manage water inrush and coal burst risks. The modelling results show that overburden deformation stops at a certain height, above which the displacement profile over multiple longwall panels become nearly flat. Increasing panel width and extraction height lead to a greater extent of the fractured zone and a larger magnitude of surface subsidence. An extraction height of more than 7 m may breach the thick aquifer. Stress concentration on the wide pillar can undergo up to 5 times increase in the in-situ stress, posing high risks of coal burst. Adjusting mining parameters such as panel width and extraction height can facilitate an effective strategy to minimize water inrush and coal burst risks in such a mining condition.

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Pillar Burst Assessment Based on Large-scale Numerical Modeling

Cited by 12 publications

References 3 publications

Occurrence mechanism and prevention technology of rockburst, coal bump and mine earthquake in deep mining

Occurrence mechanism and prevention technology of rockburst, coal bump and mine earthquake in deep mining

A Prediction Method of Coal Burst Based on Analytic Hierarchy Process and Fuzzy Comprehensive Evaluation

Characterization of Overburden Deformation and Subsidence Behavior in a Kilometer Deep Longwall Mine

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