Development of a Method for Testing a Powered Roof Support in Order to Determine its Operating Parameters

Abstract

Monitoring of powered roof supports is an area for research. External factors have a significant impact on the operation of powered support in a longwall excavation, therefore the use of solutions that will counteract these factors is an area for improvement. The article presents studies related to the adaptation of the measuring and recording system for the geometric parameters of the section and its compatibility with the powered roof support. Each of the presented stages consisted of a series of analyses based on computer simulations using the finite element method (FEM), as well as bench tests and real-life tests. The tests included defining the geometric parameters of the powered roof support’s work in the test site and the mining wall. These studies allowed for the development of guidelines for the monitoring system. The results and analysis allowed for the formulation of two crucial conclusions. The use of a measuring system is a tool that allows monitoring the geometric parameters of the powered roof support during the coal mining process. The system monitors the transverse and longitudinal inclinations of the canopy, base floor, shield and the lemniscate, as well as the operating height of the support. The structure of the powered support can also be improved to improve operational safety by installing innovative mounting brackets for the monitoring system. The holders will allow for safer and more precise installation of the sensors and will make calibration of the system easier.