Influence of rod fasteners on stability of drifts in thick seams of weak coal (research on models).

Abstract

According to the current temporary instruction, it is recommended to use the rod fastening only in rocks of strength not lower than 3 (on the scale of M. M. Protodyakonov).According to preliminary calculations, the use of rod fastening in the drifts through thick coal seams, in particular, at the Kuzbass hydro-mines, should give a significant technical and economic effect. Since the coal strength factor of thick coal seams often does not exceed 0.3-0.5, and the coal mass is characterized by significant fracturing, it was necessary to justify the possibility of using the rod support in difficult conditions. In this connection it was necessary to reveal the character of deformation of weak fractured coal near the mine workings, secured with rod fasteners at different dip angles of seams ...