Fracture Characteristics of a Soft Rock Roadway: Staged and Zoned Control
LI Xue-hua
YAO Qiang-ling
ZHANG Nong
Abstract：An accurate understanding of fracture and cracking in surrounding rock is the key to solving the problem of maintaining a soft-rock roadway. Experimental studies have been done within a typical soft-rock roadway in a coal mine. The components and micro-structural fea-tures of the surrounding rock were investigated. The properties of the rocks around the road-way and the process of fracture expansion were tested on site. The results show that crack propagation and run-through are non-uniform and occur in several stages. Key technologies for supporting the roadway by stages in different regions were put forward after considering time effects, local breakdown characteristics and fracture development. Staged concrete spraying, intensive support from anchor bolting (cabling) and control of the grouting process in the sur-rounding rock are the main parts of strengthened support technology. Practice shows that rock cracking in soft rock surrounding a roadway can be effectively controlled by this support tech-nology. Stability of the rock surrounding the roadway can be achieved.
Keywords：soft rock roadwayfracture characteristicssupport by stage
Publication Date：2009-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 618-623 )