Tests of loading efficiency of worm-type cutting drums in longitudinally inclined longwall working
Journal Title: Mining – Informatics, Automation and Electrical Engineering - Year 2018, Vol 536, Issue 4
Abstract
This article presents the execution and results of tests of the loading efficiency of worm-type cutting drums as a function of the slope of a longwall working. The tests were carried out at various angles of longitudinal inclination of a longwall within a range of 0° to 9° along the strike. In real conditions, the separation of the two basic processes that take place during operation of a longwall shearer (i.e., milling and loading) is not possible; therefore, the research was carried out under laboratory conditions at the Department of Mining, Dressing, and Transport Machines at AGH University of Science and Technology in Krakow. The tests were carried out on a special station that allowed for the gradual change of the longitudinal and transverse slope of a longwall working. Based on the conducted tests, it was found that the inclination of a longwall working influences the loading efficiency; i.e., that, along with an increase in the angle of the longitudinal inclination, loading resistance increases while the loading efficiency decreases.
Authors and Affiliations
Tomasz Wydro
Keywords
Related Articles
- EP ID EP471159
- DOI 10.7494/miag.2018.4.536.65
- Views 127
- Downloads 0
Condition monitoring experiences of machines in Hungarian Márkushegy underground mine
This paper presents the results obtained during the years of vibration and current signature monitoring at the Márkushegy mining plant before its final closure. The large amount of recorded data has been used for a stati...
Analysis of cutting picks trajectory and cutterhead vibrations of roadheader with use of high-speed cameras
In order to identify the behavior of cutting picks during the process of mining with the use of a roadheader’s cutterhead, an optic system has been employed. The main elements of the system were high-speed cameras. In co...
Hardware-in-the-Loop simulation applied to roadheader cutting head speed control system testing
This paper presents a description of the test stand and results of the Hardware-in-the-Loop simulation for the angular speed control system of roadheader cutting heads. The system has been implemented in the LabView pack...
How to assess and improve the quality of voice services in telephone communication and alarm systems in mines
The article presents selected objective and subjective methods to assess the quality of voice services in telephone communication. The authors described the impact of the line and acoustic echo phenomena and ambient nois...
Theoretical study of dependence of screwing of drilling-pipe connector on thread-process cutting tool profile
Screwing is one of the main parameters of the quality of a drill string tapered thread tool joint. It indicates the number of screwing operations that can be applied to this tool joint during drilling. Tool joints that h...