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Rock Mechanics and Rock Engineering

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01.02.2018 | Original Paper

Case Studies of Rock Bursts Under Complicated Geological Conditions During Multi-seam Mining at a Depth of 800 m

verfasst von: Tong-bin Zhao, Wei-yao Guo, Yun-liang Tan, Yan-chun Yin, Lai-sheng Cai, Jun-feng Pan

Erschienen in: Rock Mechanics and Rock Engineering | Ausgabe 5/2018

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Abstract

A serious rock burst (“4.19” event) occurred on 19 April 2016 in the No. 4 working face of the No. 10 coal seam in Da’anshan Coal Mine, Jingxi Coalfield. According to the China National Seismological Network, a 2.7 magnitude earthquake was simultaneously recorded in this area. The “4.19” event resulted in damage to the entire longwall face and two gateways that were 105 m in long. In addition, several precursor bursts and mine earthquakes had occurred between October 2014 and April 2016 in the two uphill roadways and the No. 4 working face. In this paper, the engineering geological characteristics and in situ stress field are provided, and then the rock burst distributions are introduced. Next, the temporal and spatial characteristics, geological and mining conditions, and other related essential information are reviewed in detail. The available evidence and possible explanations for the rock burst mechanisms are also presented and discussed. Based on the description and analysis of these bursts, a detailed classification system of rock burst mechanisms is established. According to the main causes and different disturbance stresses (i.e., high/low disturbance stresses and far-field/near-field high disturbance stresses), there are a total of nine types of rock bursts. Thus, some guidelines for controlling or mitigating different types of rock bursts are provided. These experiences and strategies not only provide an essential reference for understanding the different rock burst mechanisms, but also build a critical foundation for selecting mitigation measures and optimizing the related technical parameters during mining or tunnelling under similar conditions.

Vorheriger Artikel Discrete Analysis of Damage and Shear Banding in Argillaceous Rocks

Nächster Artikel Elastic–Brittle–Plastic Behaviour of Shale Reservoirs and Its Implications on Fracture Permeability Variation: An Analytical Approach

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Titel: Case Studies of Rock Bursts Under Complicated Geological Conditions During Multi-seam Mining at a Depth of 800 m
verfasst von: Tong-bin Zhao
Wei-yao Guo
Yun-liang Tan
Yan-chun Yin
Lai-sheng Cai
Jun-feng Pan
Publikationsdatum: 01.02.2018
Verlag: Springer Vienna
Erschienen in: Rock Mechanics and Rock Engineering / Ausgabe 5/2018
Print ISSN: 0723-2632
Elektronische ISSN: 1434-453X
DOI: https://doi.org/10.1007/s00603-018-1411-7

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