An evaluation of roof support plans at two coal mines in Illinois using numerical models

A concept of use of CAD systems in testing collision of underground transportation means is presented. Reasons for undertaking this problem are given with end users identified. The concept of the system for collision analyses of transported loads is described. Examples of collision analysis during transportation of powered roof support are given. Presented system is designed to aid planning, organizational and training activities undertaken in management of transportation safety in mines. It will be also possible to use software resources, developed within the system as the didactic material as regards safe transportation process, which include hazards to the employees working in the area of transportation operations. Developed prototype of a system for testing the collision of underground transportation means was positively assessed by employees of the Coal Company, JSC - industrial partner of KOMAG. This prototype is continuously improved and adapted for commercial implementation in the selected coal mines.

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Virtual Analysis of the Mining Support under Loads of the Roof

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.837.393 ◽

2013 ◽

Vol 837 ◽

pp. 393-398 ◽

Cited By ~ 20

Author(s):

Aleksander Gwiazda

Keyword(s):

Coal Mining ◽

Coal Mines ◽

Work Conditions ◽

Coal Bed ◽

Virtual Model ◽

Virtual Analysis ◽

The Stability ◽

Roof Rocks ◽

Investigation Process ◽

Roof Support

The paper presents the results of virtual analysis of the stability of mining roof supports loaded by the roof rocks. The hydraulic roof support generally accounts for over 50% of the total value of a coal mining and excavating system. Many reports show that in some conditions roof supports behave differently than foreseen. To explain this phenomena the investigations basing on the virtual model were done [1,2]. This phenomena is very dangerous for miners because this behaviour of a mining roof support may cause dangerous accidents in coal mines. In the investigation process some questions have been asked. Firstly what type of a mining support is more liable to this behaviour. Secondly what work conditions are the most dangerous. To analyse this phenomena it was used models of two types of a mining support. One with two props and one with four ones. Results show that that the problem of plunged of roof parts of a support in the coal bed is consider with the construction of the support. The most dangerous is the roof support with two props. The consequences of this results are the recommendations to use rather supports with four props then two.

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