Virtual prototyping of powered-roof supports in case of changeable loads
Tokarczyk J.

State-of-the-art method for selection of start-up devices for mining drives of belt conveyors  
Kulinowski P.

Safety of the work in face ends  
Musiał B., Lisiecki K.

Present condition and development prospective for the ‘Bogdanka’ Colliery
Stachowicz S.

Present problems of coal exploatation in the ‘Bogdanka’ Colliery resulting from specificity of mining-and-geological and technical-and-organizational conditions
Krasowski Z.

State-of-the-art monitoring system for technological process for the ‘Bogdanka’ Colliery  
Mironowicz W.

Selected methods and measures for increase of safety and cost reduction of mining shaft hoists operation
Hansel J.

Wheel-and-rail transport on inclined road-ways with use of emergency braking system  
Krauze K.




Virtual prototyping of powered-roof supports in case of changeable loads
Tokarczyk J.

S u m m a r y
The paper presents an application of MSC.Fatigue software for the virtual prototyping of powered-roof supports in case of changeable loads, which are exerted on powered-roof supports in the test stands. According to the requirements of PN-EN 1804-1 Standard it is necessary to conduct fatigue stand tests for every set of new powered-roof support. Use of MSC.Fatigue software significantly broadens the area of virtual prototyping, which is more frequently used when new mining machines and devices are designed.




State-of-the-art method for selection of start-up devices for mining drives of belt conveyors  
Kulinowski P.

S u m m a r y
State-of-the art method for selection of start-up de- vices for mining drives of belt conveyors is described. The paper focuses especially on a presentation of indicators for start-up assessment associated with load of the belt and the drive system.




Safety of the work in face ends  
Musiał B., Lisiecki K.

S u m m a r y
Work safety in face ends is described in the paper. Due to an implementation of face end powered roof supports we can expect a significant improvement of work safety, consisting in elimination of the hazards caused by falling rocks and coal blocks as well as in a reduction of work effort.





Present condition and development prospective for the ‘Bogdanka’ Colliery
Stachowicz S.

S u m m a r y
The paper presents history and development prospective for the ‘Bogdanka’ Colliery as well as present condition, organizational changes and restructuring of the ‘Kopalnie Lubelskiego Zagłębia Węgla w Budowie’ Company (i.e. the ‘Bogdanka’ Colliery) within 30 years of the company existence.




Present problems of coal exploatation in the ‘Bogdanka’ Colliery resulting from specificity of mining-and-geological and technical-and-organizational conditions
Krasowski Z.

S u m m a r y
The paper presents problems of coal exploatation in the ‘Bogdanka’ Colliery resulting from specificity of mining-and-geological and technical-and-organizational conditions. Concentration of longwall mining is the main way to reduce the unit costs of coal mining in  the ‘Bogdanka’ Colliery. Successive increase of face advances and of daily output from one face, as well as increase of efficiency take place since early 1990s.




State-of-the-art monitoring system for technological process for the ‘Bogdanka’ Colliery  
Mironowicz W.

S u m m a r y
The need of competitiveness of Polish coal makes the coal mines to introduce state-of-the-art solutions in the field of mining, control and management within technical restructuring. Mining in the coal mines with several highly productive mining areas needs the full monitoring of mining machinery system and transportation lines to extend, among others, the effective operation time of the machine and time between the breakdowns. Also some activities which will minimize the necessity of stopping the mining operations, e.g. because of safety reasons, are necessary. The ‘Bogdanka’ Colliery, which has one of the best results in comparison with other Polish collieries, was the first coal mine which started to implement the presented state-of-the-art solutions. Described in the paper solutions have completely innovatory character and were  developed within the project No 9 T12A 094 97 C/3716 financed by the Scientific Research Committee and the ‘Bogdanka’ Colliery.




Selected methods and measures for increase of safety and cost reduction of mining shaft hoists operation  
Hansel J.

S u m m a r y
The paper presents overall characteristics of mining industry in Poland from the safety of SMTP vertical transportation machinery systems point of view. Selected results of AGH cognitive and practical scientific-and-research studies on safety of mining shaft hoists, which are one of three SMTP sub-systems, are described. It has been found that the rightness of thesis about existing possibilities of vertical transportation cost reduction with simultaneous increase of reliability and safety of mining shaft hoists is the most important achievement. Thesis rightness has been proved on the basis of HWR movable stabilizing blocks, modar® lining and systems for the operation of vessels with combined PHH shock-absorber.




Wheel-and-rail transport on inclined road-ways with use of emergency braking system  
Krauze K.

S u m m a r y
Phenomenon of uncontrolled movement (self-sliding) of wheel-and-rail transportation vessels is a big problem during the transport of payloads on the inclined roadways. The possibility of counteracting this phenomenon, when disadvantages of applied present solutions are eliminated, was the reason to develop a new way of wheel-and-rail transport with use of braking car, which was used for transportation in LW ‘Bogdanka’. Braking car developed to for requirements in the ‘Kazimierz-Juliusz’ Colliery was the first prototype of this solution. Experience gained so far as well as economical calculations of the undertaking confirm the rightness of assumptions and an achievement of planned effects. The possibility of implementation of braking system operating in LW ‘Bogdanka’ and in other Polish mines was confirmed by the State Mining Authority (GM-107/04).