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https://doi.org/10.17559/TV-20141207160855

Distribution characteristics analysis of pressure-arch in horizontal stratified rocks under coal mining conditions

Shu-ren Wang orcid id orcid.org/0000-0001-5490-2825 ; Opening Laboratory for Deep Mine Construction, Henan Polytechnic University, 2001 Century Avenue, Jiaozuo, Henan Province, 454003, China
Ning Li ; School of Civil Engineering and Mechanics, Yanshan University, No. 438 Hebei West Street, Haigang District, Qinhuangdao, 066004, China,
Chun-liu Li ; School of Civil Engineering and Mechanics, Yanshan University, No. 438 Hebei West Street, Haigang District, Qinhuangdao, 066004, China
Chen Cao ; Engineering Faculty, University of Wollongong, NSW 2530, Australia


Puni tekst: engleski pdf 1.176 Kb

str. 997-1004

preuzimanja: 481

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Puni tekst: hrvatski pdf 1.176 Kb

str. 997-1004

preuzimanja: 356

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Sažetak

The criteria of separation and dislocation of the layered roof in mining are put forward through the simplified mechanical model with weak inter-layers. Considering five different variables, namely the number of layers, the distance from the weak inter-layers to the mine opening, the thickness of the weak inter-layers, the lateral pressure coefficient and the spacing of the bedding planes, the distribution characteristics of the pressure-arch in the horizontal stratified rocks are analyzed during coal mining using FLAC3D. The results show that the newly appeared pressure-arch is composed of the original pressure-arch in each layer and the pressure-arch shape being affected by the weak layer in the surrounding rock of the mine opening. As the distance between the inter-layers and the coal seam increases, the effect on the pressure-arch is reduced gradually. The thinner inter-layers produce greater impact on the pressure-arch. The lateral pressure coefficient has a great influence on the pressure-arch and a stable pressure-arch could only be formed when the lateral pressure coefficient is in a suitable range.

Ključne riječi

numerical analysis, pressure-arch, stratified rock, weak inter-layers

Hrčak ID:

143153

URI

https://hrcak.srce.hr/143153

Podaci na drugim jezicima: hrvatski

Posjeta: 1.430 *