Studies on the performance of impact resistant structure of hydraulic support in fully mechanized mining face under rock burst

• Autorzy: Zhang Qiang , Zhang Runxin

Identyfikatory

DOI

10.15632/jtam-pl/154914

• Języki publikacji: EN

Abstrakty

EN

In order to solve the support problem of a fully mechanized coal face under rock burst and with the goal of safe and efficient coal mining, the present study hasenvisaged a hexagon periodic arrangement energy absorption structure. Based on the shell theory, the mechanical model of the impact resistant structure and hydraulic support was constructed using the finite element method. The mechanical properties of the hydraulic support under a full impact and a partial load impact of the roof were analysed, and the impact resistant structure was designed to prove the reliability of the structure. The results showed that the anti-impact structure reduced the stress and stress fluctuation of the column and effectively reduced the shape variable of the weak link of the hydraulic support. Furthermore, a delay in the time was observed, when the pressure of the hydraulic cylinder reached the yield strength, and there was a gain in the time for the opening of the large flow safety valve. Especially, under the action of partial load, the column did not bend, and the hydraulic cylinder was in the elastic range. Our results can provide new insights in the support of rock burst working face, which is of great significance concerning safety in the coal mining.

Słowa kluczowe

EN

rock burst; energy absorbing structures; finite element; mechanical properties

• Wydawca: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
• Czasopismo: Journal of Theoretical and Applied Mechanics
• Rocznik: 2022
• Tom: Vol. 60 nr 4
• Strony: 649--658
• Opis fizyczny: Bibliogr. 17 poz., rys., tab.

Twórcy

autor

Zhang Qiang

• Shandong University of Science and Technology, Qingdao, China

autor

Zhang Runxin

• Shandong University of Science and Technology, Qingdao, China

Bibliografia

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• 13. Wang A.W., Fan D.W., Pan Y.S., et al., 2021a, Determination of three-level energy absorbing support parameters in rock burst roadway based on energy calculation, Coal Science and Technology, 49, 6, 72-81.
• 14. Wang C.H., Jiang H.X., Niu H.C., et al., 2021b, Research on variable gradient thin-walled energy absorbing component of scour-proof hydraulic support, Journal of Mechanical Strength, 43, 5, 1062-1069.
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• 17. Yi Z.H., 2021, Study on multi-parameter rockburst early warning in large buried face, Coal Mine Modernization, 30, 4, 65-68.

Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).