The main aim of the project is to develop solutions aiming at as large as possible decrease of bucket wheel excavators failure frequency during operation in difficult mining conditions including unmineable inclusions and geological structures with excessive mining resistance. It is planned that developed solutions will refer not only to operating bucket wheel excavators but also to newly constructed. It is necessary to elaborate new solutions because currently applying rules and regulations referring to excavators construction do not include sufficiently mining conditions occurring during exploitation of such structures.

The main aim of the project will be obtained by:
1.
Development of conditions to be laid down during construction of mining units in order to decrease dynamic loads during operation of buckets in structures with excessive resistance as well as decrease of impulse loads resulting from encountering of unmineable inclusions without decrease of operation efficiency and as much as possible adjustment of load carrying stricture of the machine to resulting from previous experiences dynamic loads during operation in such conditions.
2. Development of constant monitoring of effort degree (immediate and fatigue) of load carrying structure of bucket wheel excavator enabling proper control of machine operation as well as prevention of possible failures. The monitoring system will be installed on load carrying structure because possible failures in this area have the worst consequences.

WP 1

Optimal adaptation of currently exploited and new bucket-wheel excavators for mining of overburden including interlayers with excessive mining resistance and unmineable inclusions...

WP 2

Monitoring system of bucket wheel excavator load carrying structure efforts and method of diagnostic signals analysis for current assessment of threats of load carrying structure damages as well as constant control...

WP 3

Real-time mine-face inspection system, based on geophysical methods, capable to detect hard rock inclusions and geological formations which are difficult to be excavated by bucket-wheel excavators...

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WP-1

The main aim of WP1 is to define requirements to be set during bucket wheel excavators (BWE) construction in order to obtain as low as possible dynamic loads of a machine and proper resistance of load carrying structure to these loads during exploitation of structures with excessive mining resistance and with unmineable inclusions.
In order to obtain this aim it is necessary to:
  1. Define requirements concerning mining system enabling decrease of amplitude for all kinds of dynamic loads.
  2. Determine, on the basis of real excavators, values of maximal stresses in load carrying structure resulting from impulse loads during exploitation of structures with unmineable inclusions as well as coefficient of stresses resulting from mass vibrations in function of properties, included in exploited structure with excessive mining resistance.
  3. Develop a method of definition of computational substitute strength enabling proper analysis of impulse loads arising when a bucket encounters unmineable inclusions.
Mass load coefficients and values of substitute strength defined on the basis of conducted research will enable improvement of calculation methods of bucket wheel excavators’ load carrying structures.