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Experimental investigations of the stability of winning equipment and of scraper-chain conveyors

Abstract

Extensive experiments have been carried out in order to find out about the correlation between strength and time behaviour of displacement, holding, and staying forces. The findings have shown that displacement forces depend on chain slack forces due to the drives. The maximum values of slack forces do not occur together, so that their sum does not act as total force. One finding was that when overload prevention devices are used, these do not respond simultaneously. Therefore, only the shear bolt fracture force of one drive can have a displaying effect. Apart from frictional forces, position-stabilizing holding forces were effects of mass acceleration and elastic forces as well as the holding forces of the longwall face. In addition to these experiments, a mathematical description of blocking and staying processes was elaborated at the institute of mining scineces of Aachen technical university.
Authors:
Henkel, E H; [1]  Ahrens, K; Dembeck, R [2] 
  1. Bergbau-Forschung G.m.b.H., Essen (Germany, F.R.). Versuchsfeld fuer Gewinnungs- und Strebfoerdertechnik
  2. Berbau-Forschung G.m.b.H., Essen (Germany, F.R.)
Publication Date:
Jun 01, 1979
Product Type:
Journal Article
Reference Number:
EDB-80-008910
Resource Relation:
Journal Name: Glueckauf-Forschungsh.; (Germany, Federal Republic of); Journal Volume: 40:3
Subject:
01 COAL, LIGNITE, AND PEAT; MINING EQUIPMENT; STABILITY; COAL MINING; CONVEYORS; STRAINS; UNDERGROUND MINING; EQUIPMENT; MINING; 012000* - Coal, Lignite, & Peat- Mining
OSTI ID:
5750266
Country of Origin:
Germany
Language:
German
Other Identifying Numbers:
Journal ID: CODEN: GKFRA
Submitting Site:
DE
Size:
Pages: 91-95
Announcement Date:
Oct 01, 1979

Citation Formats

Henkel, E H, Ahrens, K, and Dembeck, R. Experimental investigations of the stability of winning equipment and of scraper-chain conveyors. Germany: N. p., 1979. Web.
Henkel, E H, Ahrens, K, & Dembeck, R. Experimental investigations of the stability of winning equipment and of scraper-chain conveyors. Germany.
Henkel, E H, Ahrens, K, and Dembeck, R. 1979. "Experimental investigations of the stability of winning equipment and of scraper-chain conveyors." Germany.
@misc{etde_5750266,
title = {Experimental investigations of the stability of winning equipment and of scraper-chain conveyors}
author = {Henkel, E H, Ahrens, K, and Dembeck, R}
abstractNote = {Extensive experiments have been carried out in order to find out about the correlation between strength and time behaviour of displacement, holding, and staying forces. The findings have shown that displacement forces depend on chain slack forces due to the drives. The maximum values of slack forces do not occur together, so that their sum does not act as total force. One finding was that when overload prevention devices are used, these do not respond simultaneously. Therefore, only the shear bolt fracture force of one drive can have a displaying effect. Apart from frictional forces, position-stabilizing holding forces were effects of mass acceleration and elastic forces as well as the holding forces of the longwall face. In addition to these experiments, a mathematical description of blocking and staying processes was elaborated at the institute of mining scineces of Aachen technical university.}
journal = []
volume = {40:3}
journal type = {AC}
place = {Germany}
year = {1979}
month = {Jun}
}