Study of rock fracture mechanisms and risk assessment in mining roadways located in highly stressed rock
Abstract：Plasto-elastic theory is used to solve the stress function in rock surrounding an under- ground roadway. Fracture mechanisms in highly stressed rock surrounding a mine roadway are discussed. The risk of rupture in the rock and the slip-plane distribution are determined by use of a hazard function. The results show that a fracture zone appears when q/C is greater than, or equal to, 4. 1156e^0.0606φ0 in the rock at an the internal friction angle φ0. Wall rock cracking extends on both sides, on the surface and deep in the rock, until the fracture zone forms for φ0 values between 15 and 23 degrees. Cracks extend only deep into the rock for φ0 values between 23 and 60 degrees because the carrying capacity of the rock increases. This method leads to ef- fective control of rock deformation in engineering practice.
Keywords：high stressextraction roadwayrepture mechanismrisk factors
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 361-365,396 )