Outbursts and geological structures in coal mines: A review

Shepherd, J.; Rixon, L.K.; Griffiths, Luke

doi:10.1016/0148-9062(81)91192-x

Cited by 172 publications

(88 citation statements)

References 15 publications

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“…), mining induced stresses, strong sandstone beds in the roof, pillar size and shape, mining technique and mining rate (Westman, 2001). Therefore, microseismic monitoring has also been suggested as a potential approach to provide early warning and even prediction for rock bursts and gas outbursts (Flores, 1998;Shepherd et al, 1981).…”

Section: Introductionmentioning

confidence: 99%

Seismic monitoring and analysis of excessive gas emissions in heterogeneous coal seams

Durucan

Jamnikar

et al. 2015

International Journal of Coal Geology

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Uncontrolled and excessive gas emissions pose a serious threat to safety in underground coal mining. In a recently completed research project, a suite of monitoring techniques were employed to assess the dynamic response of the coal seam being mined to longwall face advance at Coal Mine Velenje in Slovenia. Together with continuous monitoring of gas emissions, two seismic tomography measurement campaigns and a microseismic monitoring programme were implemented at one longwall top coal caving panel. Over 2,000 microseismic events were recorded during a period of four months. Over the same period, there also was a recorded episode of relatively high gas emission in the same longwall district. In this paper, a detailed analysis of the processed microseismic data collected during the same monitoring period is presented. Specifically, the analysis includes the spatial distribution of the microseismic events with respect to the longwall face advance, the magnitude of the energy released per week and its temporal evolution. Examination of the spatial distribution of the recorded microseismic events has shown that most of the microseismic activity occurred ahead of the advancing face. Furthermore, the analysis of the gas emission and microseismic monitoring data has suggested that there is a direct correlation between microseismicity and gas emission rate, and that gas emission rate tends to reach a peak when seismic energy increases dramatically. It is believed that localised stress concentration over a relatively strong xylite-rich zone and its eventual failure, which was also identified by the seismic tomography measurements, may have triggered the heightened microseismic activity and the excessive gas emission episode experienced at the longwall panel monitored.

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Section: Introductionmentioning

confidence: 99%

Seismic monitoring and analysis of excessive gas emissions in heterogeneous coal seams

Durucan

Jamnikar

et al. 2015

International Journal of Coal Geology

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“…For these structures, as can be seen from Shepherd's review [42] and Li's field research in Pingdingshan coalfield [43], most of them are directly associated with outbursts. For the fold, syndine fold is more outburst-prone structure because its compression joints are more favourable to gas storage when compared with tension joints of antidinal fold.…”

Section: Geological Structuresmentioning

confidence: 99%

Development of a quantitative assessment approach for the coal and gas outbursts in coal mines using rock engineering systems

Zhou

Herrera

Hidalgo

2017

International Journal of Mining, Reclamation and Environment

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ABSTRAeTIn this study, a new approach is proposed and developed for evaluating the comprehensive outburst index (range between Oand 100), which is a quantitative assessment approach and will enable us to better understand the risk degree of coal and gas outburst in coal mines. By selecting some typical risk-free and high-risk outburst mines from China as the evaluation targets, we assessed their comprehensive outburst indexes with the developed approach. The assessment results are fully consistent with the actual situations, which indicates that our new developed approach is reliable and can be recommended for applying in more coal mines.

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“…In another study, the faults were the main formation factors to interlayer-gliding structures (Wang et al, 1992;Wang et al, 1993). Faults and interlayer-gliding structures play an important role in control-ling gas outbursts (Farmer and Pooley, 1967;Shepherd et al, 1981;Li, 2001). The relation between interlayergliding structures and coal flow has been discussed (Wang et al, 1998;Ju and Wang, 2002).…”

Section: Introductionmentioning

confidence: 97%

The relation between modes of lithologic association and interlayer-gliding structures in coal mine

Le¹,

Chen²,

Yang³

2010

J Coal Sci Eng China

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As a case study of the Panji No.1 Coal Mine in Anhui Province, based on the site measured and statistical data, summarized the lithologic associations, characteristics and distribution laws of interlayer-gliding structures and tectonic coal in the No.11-2 coal seams. The results show that 9 modes of lithologic association can form interlayer-gliding structures. It is more easy for rock slip to occur when the lithologic associations are main roof + coal seam + immediate floor type, compound roof+immediate roof + coal seam + immediate floor type and immediate roof + coal seam + immediate floor type. Lithologic associations of roof and floor are the precondition to the formation of interlayer-gliding structures.

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Outbursts and geological structures in coal mines: A review

Cited by 172 publications

References 15 publications

Seismic monitoring and analysis of excessive gas emissions in heterogeneous coal seams

Seismic monitoring and analysis of excessive gas emissions in heterogeneous coal seams

Development of a quantitative assessment approach for the coal and gas outbursts in coal mines using rock engineering systems

The relation between modes of lithologic association and interlayer-gliding structures in coal mine

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