An Overview of Chimney Subsidence Above Coal Mines

Chimney subsidence can cause surface subsidence (ground settlement) in the form of a pit or sag when there is a mine roof collapse in a mine entry. Surface subsidence occurs when the roof collapse propagates upward and does not choke itself off due to the associated volume expansion of the rubblized...

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Veröffentlicht in:Geotechnical and geological engineering 2022-12, Vol.40 (12), p.5701-5715
Hauptverfasser: Marino, Gennaro G., Zamiran, Siavash, Almiron, Flavinson
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creator Marino, Gennaro G.
Zamiran, Siavash
Almiron, Flavinson
description Chimney subsidence can cause surface subsidence (ground settlement) in the form of a pit or sag when there is a mine roof collapse in a mine entry. Surface subsidence occurs when the roof collapse propagates upward and does not choke itself off due to the associated volume expansion of the rubblized fallen materials and where no sufficiently competent rock is present to bridge the cavity. This paper contains a review and evaluation of reported case history data associated with occurrences of surface subsidence related to chimney subsidence. This analysis included investigating the chimney subsidence height potential including relative to the overburden rock conditions, extraction height, mine depth, the width of entry and the roof rock fall distance. Also, this paper provides a summary of the results of an assessment of the bridging capacity of various more common competent coal measures in the roof. This numerical analysis was performed considering linear arch conditions. Parameters which were investigated in this analysis included the competent roof rock strength, thickness, depth, and spanning distance.
doi_str_mv 10.1007/s10706-022-02242-2
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Surface subsidence occurs when the roof collapse propagates upward and does not choke itself off due to the associated volume expansion of the rubblized fallen materials and where no sufficiently competent rock is present to bridge the cavity. This paper contains a review and evaluation of reported case history data associated with occurrences of surface subsidence related to chimney subsidence. This analysis included investigating the chimney subsidence height potential including relative to the overburden rock conditions, extraction height, mine depth, the width of entry and the roof rock fall distance. Also, this paper provides a summary of the results of an assessment of the bridging capacity of various more common competent coal measures in the roof. This numerical analysis was performed considering linear arch conditions. 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subjects Analysis
Civil Engineering
Coal
Coal mines
Coal mining
Distance
Earth and Environmental Science
Earth Sciences
Geotechnical Engineering & Applied Earth Sciences
Height
Hydrogeology
Mines
Mining accidents & safety
Numerical analysis
Original Paper
Overburden
Rock
Rocks
Roof failures
Roofs
Sinkholes
Subsidence
Terrestrial Pollution
Waste Management/Waste Technology
title An Overview of Chimney Subsidence Above Coal Mines
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