Dynamic Tests of a Leg in a Powered Roof Support Equipped with an Innovative Hydraulic System

M Tyulenev,Dawid Szurgacz,A Abay,M Cehlár,D Nuray,A Khoreshok,Y Tan,S Vöth,S Zhironkin,S Anyona,J Janocko,Jarosław Brodny

doi:10.1051/e3sconf/20184103019

Abstract

Static and dynamic loads impact on a powered roof support during its operation. The dynamic loads lead to a number of consequences for the construction and the entire hydraulic system. With the increase of depth and intensity of exploitation, the number of events during which the dynamic load is greater increases. Therefore, it is necessary to research the whole unit of the support and its components under the impact of dynamic load. The article presents the results of tests of a hydraulic leg designed to work in the powered support and dynamically loaded with free fall drop. An innovative hydraulic system type DOH was mounted in the subject leg. As a result of the conducted tests, the dynamic parameters of the tested system were determined. The aim of the research was also to determine the impact of drop’s energy on the operating parameters of the tested system. The tested hydraulic system is a part of an innovative electro hydraulic control system of the powered roof support. The Authors believe that the obtained results will allow to create opportunities for the practical application of the tested system and the entire wireless control system of the mining roof support.

Highlights

Hard coal is a widely used energy resource. It is the basic fuel on which the entire economy is based in many countries
Coal is a very important raw material that has a significant impact on the entire economy
As a result of drop mass (m) impacting on the hydraulic leg, the kinetic energy of the mass was transmitted by the drop weight to the tested hydraulic system of the leg

Summary

Introduction

Hard coal is a widely used energy resource. It is the basic fuel on which the entire economy is based in many countries. In Poland, as in Russia, more and more attention is devoted to the development of innovative systems supporting these processes In both countries, coal is a very important raw material that has a significant impact on the entire economy. In both countries, a number of tests and analyses are carried out to optimize the coal exploitation process. One of the most interesting areas deciding about the level of safety, and later on the efficiency of the exploitation process, is the mine technical equipment and its optimal use [4, 9,] In this respect, the most important areas include mining machines which are the components of the powered support unit. In the entire technological process of hard coal production, the most significant is the area associated with mining and transport from the longwall zone

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