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MATHEMATICAL MODELS OF POWERED ROOF SUPPORT INTERACTION WITH SURROUNDING ROCKS

Andrei Andras, Iosif Andras, Ovidiu Bogdan Tomus

First published: 2017-06-20https://doi.org/10.5593/sgem2017/13/s03.067View metrics

Abstract

The paper deals with the study of Powered roof support analysis, taking into account the interaction with surrounding rocks. In this respect, an analytical model of kinematics and load of the shield, a differential model of the shield-rock system equivalent stiffness and a Fuzzy logic based analysis of the parameters variation are presented. In the first two models, the classical approach of shield mechanics, the loading scheme was modified by taking into account the horizontal force acting between the roof and the canopy which was presumed to be a frictional force, and the capsule force according to maximal yield force of the legs are determined for different values of the location of normal force on the canopy. Also, a differential equation has been derived, in order to obtain the time-dependent variation of the shield reaction taking into account the roof convergence, and the operation of the safety valve. The Fuzzy logic based method is used to derive the response surfaces/curves representing the dependence between basic parameters of the shield, as the initial setting pressure, and the stiffness on the response metric, i.e. the convergence and load increase during a working cycle.

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Publication details

Title
MATHEMATICAL MODELS OF POWERED ROOF SUPPORT INTERACTION WITH SURROUNDING ROCKS
Authors
Andrei Andras, Iosif Andras, Ovidiu Bogdan Tomus
Proceedings
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Science and Technologies in Geology, Exploration and Mining
Publisher
STEF92 Technology
Year
2017
Pages
529-536
SWS Citekey
Andras20173529536
ISSN
1314-2704
ISBN
978-619-7105-00-1
Language
en
Publication type
Conference Paper
Keywords
powered roof supportmathematical modelfuzzy logicshield rock system
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