Stabilization of Deep Roadways in Weak Rocks Using the System of Two-level Rock Bolts

• Autorzy: Tran Tuan Minh , Do Ngoc Thai , Dang Trung Thanh , Nguyen Duyen Phong , Vo Trong Hung

Identyfikatory

DOI

10.29227/IM-2021-02-

• Języki publikacji: EN

Abstrakty

EN

Large rock mass deformation around deep roadways in the weak rocks was a significant problem in mining activities in Vietnam and other countries. The excavation of roadways leads to high releasing stress, which exceeds the peak strength of spalling surrounding rock and causes it to enter the post-failure stage. Tensile failures then initiate and develop around the roadways, which causes the fragmentation, dilation, and separation of surrounding rock. The capacity of the primary support system is low, which results in a severe contraction in the whole section of roadways, which requires finding solutions to prevent the deformation of rock mass around roadways and technical solutions from stabilizing for deep roadways. To stability analysis of roadways can be applied analytical, experimental, semi-experimental, and numerical methods. This paper introduces the prevention mechanism of large deformation of rock mass around roadways using 2-level rock bolts. The research results show that using the system of two-level rock bolts can reduce the values of tensile stress on the boundary of roadways range from 10 to 15% compared with only one. The importance of the total displacement of rock mass on the boundary of roadways will be reduced from 3.47 to 13.85% using six long cable bolts.

Słowa kluczowe

EN

deep roadways; large deformation mechanism; control techniques; numerical simulation; weak rocks; rock bolts

PL

odkształcenia; symulacja numeryczna; kotwie górnicze

• Wydawca: Polskie Towarzystwo Przeróbki Kopalin
• Czasopismo: Inżynieria Mineralna
• Rocznik: 2021
• Tom: no. 2
• Strony: 157--166
• Opis fizyczny: Bibliogr. 21 poz., rys., tab., wykr., zdj.

Twórcy

autor

Tran Tuan Minh

• Hanoi University of Mining and Geology, 18 Vien street, Hanoi, Vietnam

autor

Do Ngoc Thai

• Hanoi University of Mining and Geology, 18 Vien street, Hanoi, Vietnam

autor

Dang Trung Thanh

• Hanoi University of Mining and Geology, 18 Vien street, Hanoi, Vietnam

autor

Nguyen Duyen Phong

• Hanoi University of Mining and Geology, 18 Vien street, Hanoi, Vietnam

autor

Vo Trong Hung

• Hanoi University of Mining and Geology, 18 Vien street, Hanoi, Vietnam

Bibliografia

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Uwagi

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