TY - JOUR AU - Tuan Minh TRAN AU - Ngoc Thai DO AU - Trung Thanh DANG AU - Duyen Phong NGUYEN AU - Trong Hung VO PY - 2021/12/14 Y2 - 2024/03/28 TI - Stabilization of Deep Roadways in Weak Rocks Using the System of Two-level Rock Bolts JF - Inżynieria Mineralna JA - IM VL - 1 IS - 2 SE - DO - 10.29227/IM-2021-02-13 UR - https://inzynieriamineralna.com.pl/index.php/testowe/article/view/234 AB - Large rock mass deformation around deep roadways in the weak rocks was a significantproblem in mining activities in Vietnam and other countries. The excavation of roadways leads to highreleasing stress, which exceeds the peak strength of spalling surrounding rock and causes it to enter thepost-failure stage. Tensile failures then initiate and develop around the roadways, which causes thefragmentation, dilation, and separation of surrounding rock. The capacity of the primary support systemis low, which results in a severe contraction in the whole section of roadways, which requires findingsolutions to prevent the deformation of rock mass around roadways and technical solutions fromstabilizing 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 largedeformation of rock mass around roadways using 2-level rock bolts. The research results show that usingthe system of two-level rock bolts can reduce the values of tensile stress on the boundary of roadwaysrange from 10 to 15% compared with only one. The importance of the total displacement of rock mass onthe boundary of roadways will be reduced from 3.47 to 13.85% using six long cable bolts. ER -