Experimental and theoretical study on the dynamic ejection process of a rock burst under a static load

• Autorzy: Zheng Weiyu

Identyfikatory

DOI

10.24425/ams.2021.136691

• Języki publikacji: EN

Abstrakty

EN

As the duration of a rock burst is very short and the roadway is seriously damaged after the disaster, it is difficult to observe its characteristics. In order to obtain the dynamic characteristics of a rock burst, a modified uniaxial compression experiment, combined with a high-speed camera system is carried out and the process of a rock burst caused by a static load is simulated. Some significant results are obtained: 1) The velocity of ejected particles is between 2 m/s and 4 m/s. 2) The ratio of elastic energy to plastic energy is about five. 3) The duration from integrity to failure is between 20 ms and 40 ms. Furthermore, by analyzing the stress field in the sample with a numerical method and crack propagation model, the following conclusions can be made: 1) The kinetic energy of the ejected particles comes from the elastic energy released by itself. 2) The ratio of kinetic energy to elastic energy is between 6% and 15%. This can help understand the source and transfer of energy in a rock burst quantitatively.

Słowa kluczowe

EN

rock burst; high-speed camera; kinetic energy; stress field; crack propagation

PL

skała; energia kinetyczna; pęknięcie

• Wydawca: Instytut Mechaniki Górotworu PAN
• Czasopismo: Archives of Mining Sciences
• Rocznik: 2021
• Tom: Vol. 66, no. 1
• Strony: 43--56
• Opis fizyczny: Bibliogr. 19 poz., rys., tab., wykr.

Twórcy

autor

Zheng Weiyu

• China University of Mining & Technology (Beijing), School oF Energy and Mining Engineering 2
• State Key Laboratory of Coal Mining and Clean Utilization, China

• https://orcid.org/0000-0002-2951-7965

Bibliografia

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021)