Abstract
In this article, the method of hard rock mining by undercutting or back incision using asymmetrical disk tools as an alternative to the milling method with the use of cutting tools was described. The results of modelling the penetration of a single asymmetric disk tool edge into an artificial and natural rock sample were presented and compared with empirical laboratory tests. The effect of stand tests for mining artificial rock samples using asymmetrical disk tools mounted on the rotating plate was presented. The tests were carried out on two unique test stands. The solution of an innovative mining head with a complex motion trajectory, using the asymmetrical disk tools, was presented. The innovative mining head especially developed at the AGH Kraków Department of Machinery Engineering and Transport for roadheaders, was presented. The results of preliminary field tests with the use of this mining head were also described.
Highlights
IntroductionGallery and tunnel driving and mineral resources excavation are currently often performed under severe conditions
Introduction of Asymmetrical Disk Tools forHardGallery and tunnel driving and mineral resources excavation are currently often performed under severe conditions
Test Results on the Stand Mini-Disk for MiningTools with a Complex-Motion Trajectory Milling Plate, Complementary studies were conducted to confirm this statement on the special test
Summary
Gallery and tunnel driving and mineral resources excavation are currently often performed under severe conditions. These relate to the significant depth of the deposits and more challenging geological conditions. The costs incurred to uncover deposits and perform preparatory work have a significant effect on mining’s economic efficiency. That is why the mechanical complexes to facilitate driving preparatory and exploitation workings at advance rates high enough to reduce mining costs, are used. One of the main tasks when selecting these complexes is choosing an appropriate method of rock mining, ensuring the durability of the mining tools and low energy consumption of the mining process [1,2,3,4,5]
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