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Coal Mining

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Coal Mining
Nr 128
Studia i Materiały

Prace Naukowe Instytutu Górnictwa Politechniki Wrocławskiej
Nr 36

Nr 128
2009

belt conveyor, failure analysis, condition monitoring

Radosław ZIMROZ*, Robert KRÓL*

FAILURE ANALYSIS OF BELT CONVEYOR SYSTEMS FOR CONDITION MONITORING PURPOSES
The paper deals with failure analysis for condition monitoring (CM). Before applying CM one shall investigate a key point in monitored machinery, what tools and methods need to be applied in order to minimise the cost of CM in harsh industrial environment as an open pit or underground mine is. The paper focus on the first step in condition, i.e. estimation of the scale of a problem: the most frequent failures, types and the location of failures and their importance in the context of maintenance of a conveyor belt transportation system. Some comments regarding possible ways for detection of mentioned faults are considered. The examples of failures and time related to replacement or repair have been provided.

1. INTRODUCTION Condition monitoring in mining industry is not as well developed as it is in other branches (i.e. power engineering, oil industry etc). One of the reasons is that mine is the specific kind of company with harsh environment and dissipation of assets in wide area. There are a lot of different mechanical systems in a lignite mine but one of the most important is a transportation system. One may consider two types of transportation systems: type 1 that convey overburden from bucket wheel excavators to dumping site and type 2 that is used for transportation of desired material (coal mainly) from bucket wheel excavators to a power plant or to another transportation system. A special feature in both cases is length of conveyor that may even reach 30 km. For example in one of the biggest lignite mine in Poland total length of conveyors is 100 km, see fig. 1. __________
* Politechnika Wrocławska, Wydział Geoinżynierii, Górnictwa i Geologii, Instytut Gónictwa, pl. Teatralny
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