Failure characteristics and strength model of composite rock samples in contact zone under compression

• Autorzy: Wang Qihu , Wang Jie , Ye Yicheng , Jiang Wei , Yao Nan

Identyfikatory

DOI

10.24425/ams.2020.133197

• Języki publikacji: EN

Abstrakty

EN

Significant differences in the physical and mechanical properties exist between the rock masses on two sides of an ore-rock contact zone, which the production tunnels of an underground mine must pass through. Compared with a single rock mass, the mechanical behavior of the contact zone composite rock comprising two types of rock is more complex. In order to predict the overall strength of the composite rock with different contact angles, iron ore-marble composite rock sample uniaxial compression tests were conducted. The results showed that composite rock samples with different contact angles failed in two different modes under compression. The strengths of the composite rock samples were lower than those of both the pure iron ore samples and pure marble samples, and were also related to the contact angle. According to the stress-strain relationship of the contact surface in the composite rock sample, there were constraint stresses on the contact surface between the two types of rock medium in the composite rock samples. This stress state could reveal the effect of the constraint stress in the composite rock samples with different contact angles on their strengths. Based on the Mohr-Coulomb criterion, a strength model of the composite rock considering the constraint stress on the contact surface was constructed, which could provide a theoretical basis for stability researches and designs of contact zone tunnels.

Słowa kluczowe

EN

contact zone; composite rock sample; contact angle; failure characteristics; constraint stress; strength model

PL

materiał kompozytowy; kąt zwilżania; awaria

• Wydawca: Instytut Mechaniki Górotworu PAN
• Czasopismo: Archives of Mining Sciences
• Rocznik: 2020
• Tom: Vol. 65, no. 2
• Strony: 347--361
• Opis fizyczny: Bibliogr. 31 poz., fot., rys., tab., wykr.

Twórcy

autor

Wang Qihu

• School of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China
• Hubei Key Laboratory for Efficient Utilization and Agglomeration of Met Allergic Mineral Resource, Wuhan 430081, China

autor

Wang Jie

• School of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China

autor

Ye Yicheng

• School of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China
• Hubei Key Laboratory for Efficient Utilization and Agglomeration of Met Allergic Mineral Resource, Wuhan 430081, China

autor

Jiang Wei

• Daye Iron Mine Corporation Limited of Wisco Resource Group, Huangshi, Hubei 435006, China

autor

Yao Nan

• School of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China
• Hubei Key Laboratory for Efficient Utilization and Agglomeration of Met Allergic Mineral Resource, Wuhan 430081, China

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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 (2020)