Work

Influence of axial stress on failure characteristics of deep arched hard rock roadway

Year: 2024

Type: article

Abstract: To study the influence of axial stress on the failure characteristics of deep arched roadway considering structural effect, true triaxial compression tests were conducted on cubic granite specimens with a three-centered arched hole structure. A video monitoring device was utilized to record the failure process of surrounding rocks. The test results show that under 10−60 MPa axial stress, the surrounding rock failure process included the calm stage, particle ejection stage, fragment ejection stage, and rock slice buckling and spalling stage. Under higher axial stresses (70 and 80 MPa), the failure process is characterized by violent fragment spray during the fourth stage. As the axial stress increases, the failure of surrounding rock increases, while the initial vertical failure stress first increases and then decreases. According to the failure characteristics of roadway under different axial stresses, arranging the roadway along the direction of a moderate axial stress level is desired.

Source: Transactions of Nonferrous Metals Society of China

DOI: 10.1016/s1003-6326(24)66656-2

Authors: Kang PENG, Ren-zhi LAI, Song LUO, Xi-bing LI

Institution: Central South University

Language: English

Topic: Rock Mechanics and Modeling

Subfield: Mechanics of Materials

Field: Engineering

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: diamond

Funders: Natural Science Foundation of Hunan Province, Science and Technology Program of Hunan Province, National Key Research and Development Program of China, Fundamental Research Funds for Central Universities of the Central South University