Development and applications of rock bolting materials for coal mine roadways

摘要

Rock bolting has been the primary supporting method for roadways in Chinese coalmines. The complete rock bolting technique includes bolting design, materials, machinery, practical procedures, quality control and on-site monitoring methods, and rock bolting materials play an important part on the technique. Rock bolting materials involve bolt rods, accessories, anchorage materials, surface control components (straps, wire mesh) and cable bolts. The development of a variety of rock bolting materials for coal mine roadways is introduced. The functions and properties of rock bolting materials and components are analyzed. Especially, the mechanical properties of the high strength rock bolts and cable bolts are described thoroughly, and the underground practices of these rock bolting materials are introduced. Finally, the existing problems of the rock bolting materials are analyzed, and their development trends in the future are proposed.