Influence of hill topography on ground pressure feature of shallow buried 7.0 m working face

doi:10.16265/j.cnki.issn1003-3033.2018.02.028

Abstract

Abstract: The influence of the hill topography on the ground pressure feature of 12205 working face in Shangwan's coal mine, taken as an example the large mining working faces in a shallow buried coal seam, was studied by means of theoretical analysis, numerical simulation and field measurement. Based on the stress transfer mechanics model, both the slope and the height of the hill were identified as the main influence factors. Then, numerical simulation was used to study the influences of both the slope and the height on the ground pressure feature. The results show the hill terrain influences more heavily both the peak value and the peak position of the bearing pressure than the flat topography does, and the influence range of the former is larger than that of the latter, that the slope is more than 30° or the height is a slope of more than 30° or a height of more than 30m, will generally cause a strong pressure, and that both the theoretical analysis and the numerical simulation conform to the reality.

Key words: hilly terrain, shallow coal seam, 7.0 m mining height, strata behavior regularity, mechanics model, bearing pressure

CLC Number:

X936

DI Shuai, WANG Jiren, LI Donghui, QI Xupeng, WANG Yansheng. Influence of hill topography on ground pressure feature of shallow buried 7.0 m working face[J]. China Safety Science Journal, 2018, 28(2): 164-169.

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