2016
DOI: 10.1515/sgem-2016-0010
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Effect of increasing mining rate on longwall coal mining – Western donbass case study

Abstract: This paper presents the problems associated with the rapid change of the rock stress-strain state in terms of increasing the rate of coal mining. Parameters of the roof collapse are determined depending on the rate of a longwall advancing under conditions of poor rocks. Statistical data are processed to obtain a general trend concerning the mining rate impact on the roof collapse. The statistical strength theory is applied to explain the increase in mined-out space and the size of hanging roof behind a coal fa… Show more

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Cited by 13 publications
(10 citation statements)
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“…Properties of the enclosing rocks are: Young's modulus is E = 3.5•10 4 MPa, Poison's ratio is ν = 0.17, and volume weight is γ = 2.5 t/m 3 Boundaries of destructed rock zones in the mined seam roof are usually set according to one of the criteria. In terms of rock masses being in complex strain state, well-tested Parchevskiy-Shashenko, Balandin, and Hoek-Brown criteria [13], [14] are applied. The paper uses strength criterion by Balandin:…”
Section: Methods and Results Of Researchmentioning
confidence: 99%
“…Properties of the enclosing rocks are: Young's modulus is E = 3.5•10 4 MPa, Poison's ratio is ν = 0.17, and volume weight is γ = 2.5 t/m 3 Boundaries of destructed rock zones in the mined seam roof are usually set according to one of the criteria. In terms of rock masses being in complex strain state, well-tested Parchevskiy-Shashenko, Balandin, and Hoek-Brown criteria [13], [14] are applied. The paper uses strength criterion by Balandin:…”
Section: Methods and Results Of Researchmentioning
confidence: 99%
“…[6][7][8] Coal mining is a time and structural dependent engineering activity, where loading rates and strength anisotropy correlate with various failures in coal mass. 9,10 Thus, unraveling the influences of loading rates on the strength of coal is significant for the roadway support, 11 dynamic disaster preventing, 12 and the geo-stress measurement. 13 The loading rate has a significant effect on the mechanical responses of coal and rock and has been broadly investigated in the past few decades.…”
Section: Introductionmentioning
confidence: 99%
“…As a consequence, the strength of coal generally shows anisotropic features as loaded in different directions 6–8 . Coal mining is a time and structural dependent engineering activity, where loading rates and strength anisotropy correlate with various failures in coal mass 9,10 . Thus, unraveling the influences of loading rates on the strength of coal is significant for the roadway support, 11 dynamic disaster preventing, 12 and the geo‐stress measurement 13 …”
Section: Introductionmentioning
confidence: 99%
“…Previous research on scraper conveyor has mainly focuses on the monitoring [5,6] and calculation [7][8][9] of running load, dynamical problems [10][11][12], friction and wear [13][14][15]. However, studies rarely account for the effect of the horizontal bending angle of the S-bending area on the additional resistance, the running load, the production energy consumption ratio, the mean time between failures (MTBF) of the mining equipment and the shear cutting efficiency has been rarely investigated.…”
Section: Introductionmentioning
confidence: 99%