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EN
Belts are widely applied in mine production for conveying ores. Understanding ore granularity, which is a crucial factor in determining the effectiveness of crushers, is vital for optimising production efficiency throughout the crushing process and ensuring the success of subsequent operations. Based on edge computing technology, an online detection method is investigated to rapidly and accurately obtain ore granularity information on high-speed conveyor belts. The detection system utilising machine vision technology is designed in this paper. The high-speed camera set above the belt is used to collect the image of the ore flow, and the collected image is input into the edge computing device. After binary, grey morphology and convex hull algorithm processing, the particle size distribution of ore is obtained by statistical analysis. Finally, a 5G router is used to output the settlement result to a cloud platform. In the GUANBAOSHAN mine of Ansteel Group, the deviation between manual screening and image particle size analysis was studied. Experimental results show that the proposed method can detect the ore granularity, ore flow width and ore flow terminal in real-time. It can provide a reference for the staff to adjust the parameters of the crushing equipment, reduce the mechanical loss and the energy consumption of the equipment, improve the efficiency of crushing operation and reduce the failure rate of the crusher.
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EN
W strap is a crucial surface support component for underground coal mine roadways. In this study, the failure characteristics of the W strap in the field are discussed, and the loading characteristics of the strap and the faceplate are numerically and experimentally analysed. Afterwards, a loading apparatus capable of reappearing the loading environment of the strap in the field is fabricated. This loading device, combined support systems consisting of a bolt, faceplate and strap is tested under different simulated strata conditions. Failure patterns of the strap are evaluated by the 3D scanning method, and proper selection of a faceplate is explored. Results indicate that a domed faceplate can achieve a favourable supporting effect on strata, and thus it is favoured compared with a square domed faceplate. In addition, rock cavity and rock integrity beneath the strap are essential factors determining the servicing life of the overall supporting system.
PL
W referacie przedstawiono wyniki badań innowacyjnych konstrukcji uszczelnień krążników o minimalnym oporze ruchu i podwyższonym poziomie szczelności. W artykule przedstawiono możliwość poprawy stopnia szczelności przy równoczesnym obniżeniu oporu ruchu uszczelnień do krążników taśmociągów. Analizie poddano własne rozwiązania uszczelnień bezstykowych z samoczynnym odprowadzeniem czynnika do otoczenia, uszczelnień ferromagnetycznych i szczotkowych. Każda z omawianych konstrukcji jest jednostką całkowicie zintegrowaną, co umożliwia automatyzację procesu osadzania uszczelnienia w krążniku.
EN
A paper presents tests results of the innovative seals for idlers of the belt conveyors with the minimal frictional losses and enhanced tightness.
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