Study on Mining Subsidence Law of Coal Seam with Extra-thick Loose-bed Thin Bedrock by Measurement
ZHANG Xianni
WANG Lei
Abstract：The analysis of geological and mining conditions and the literature study showed that the first-mining face studied in this paper belonged to the mining condition of the coal seam covered by the extra-thick loose-bed thin bedrock. Based on the measured data, the analysis method for the mining degree of the working face which took into consideration of the loose bed effect was put forward, the special law of the surface subsidence in the mining of the coal seam with the extra-thick loose-bed thin bedrock was revealed, and the scientific explanation was given to the subsidence mechanism from the perspective of key strata theory. Finally, the expected probability integral parameters of the surface movement and subsidence of the working face were calculated according to the observation data, and further analysis was made on the characteristics and generation mechanism of the expected parameters.
Keywords：extra-thick loose bedthin bedrockmining subsidenceprobability integral method
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 50-53 )