th is paper addresses the evolut ion of longwal l mining in the United States from the initial "longwall" method, utilizing hand loading and manual haulage to the progress ive mechanizat ion of the face equipment . An analysis of accident information for specific benchmark dates in United States longwall evolution and a review of productivity (for the period of 1963 1973) are provided to demons...

The growing needs to access information in remote, mobile environments have sparked interests in so-called InVehicle Telematics Systems (IVTS) [1]. These relatively new systems have the potential to deliver computing facilitates to road vehicles, which may include in-vehicle infotainment, route-guidance and navigation and the provision of vital information resources used by fleet haulage compan...

Analysis of the trends in coal industry Russia showed that, despite stable demand global market, growth rate exports is slowing down. The main reason shortcomings transport and logistics infrastructure for haulage. At same time, countries Asia-Pacific region are a promising export destination, it Eastern operating domain Russian railway network that most loaded has insufficient throughput capac...

Longwall shearers’ haulage system of the Eicotrack type, used most often nowadays, is presented in this article. Its disadvantages, causing problems with a correct operation mechanized longwall shearer systems, are discussed. The concept innovative Flextrack, which should reduce occurrence disadvantages mentioned above, described. A course and research results, connected rig tests Flextrack fun...

During this season, due to high running costs of the slewing loader,an exercise wascarriedout to compare the slewing loader and the hi-capacity Bell loaders. The slewing loader in use at the time was the model with high lift boom mounted on a Ford 6600, modified with a Brockhouse torque converter. The comparison revealed that, under the conditions obtaining at Mgayi section, the Bell loader was...