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Longwall shearer haulage systems - a historical review. Part 2 – First cordless haulage systems solutions

Korski Jacek

Mining Machines

2021

no. 2

24--33

Searching for cordless haulage systems started in early 50-ties of XX century. In semi-mechanized longwall faces in Germany and Hungary tracked narrow face cutter-loaders (first continuous miners) were used. Real trials began ten years later in Great Britain. First solutions described in this article were simply an adaptation of the existing Anderson’s or BJD’s single or double drum shearers. The main idea was to interfere to as less as possible extent with the shearer structure. After the first positive trials and experiences in British and French mines the first cordless solutions such as Rackatrack, Peratrak or ram propulsions were either developed or gone to the past. This article is a review of the first cordless shearer haulage systems.

Longwall shearer haulage systems – a historical review. Part 3 – Chainless haulage systems with drive wheel and rack bar

Korski Jacek

Mining Machines

2021

no. 3

58--69

Chainless shearer haulage systems with rack bar are currently the most popular group of this kind of solution. The first type of rack bar was captivated chain. In 70-ties great number of different solution of chainless haulage systems with drive wheel (sprocket or pin) and different rack bars were implemented. Afterwords some of them were abandoned for different reasons, but some are still in duty and under improvement. This article is the third and the last part of shearer haulage systems technical review, concentrated on chainless haulage system. Beginning from the british Rollrack with pin drive wheel and toothed rack bar through similar solutions with sprocket drive wheel in Europe and China and solutions with vertical or horizontal ladder type of rack bar is reflect technical development of shearer haulage system till contemporary solutions and trials of improvement.