Performance and Technology Application of High Strength Full Bolting andGrouting Support Structure

Aiming at the problems of discontinuous and inconsistent large deformation control of roadway surrounding rock under high stress, soft rock, dynamic pressure, cracked joints and complex difficult conditions, the high strength hollow grouting anchor bolt and high strength hollow grouting anchor cable were carried out by using the comprehensive research methods of theoretical analysis, indoor support material mechanics test and field test. Through structure analysis, performance experiment and technological application exploration, we proposed the idea of integrated control of high-strength bolting and grouting in roadways under complex and difficult conditions, i.e. through the use of high-strength hollow grouting anchor cable/bolt and high-strength surface protection components with full bolting and grouting support, the surrounding rock of roadways has finally formed a multi-level of “synergistic strong surface protection, superimposed internal arch, deep external arch”. The supporting structure is strengthened step by step, and the omni-directional high strength coupling control test is carried out in the return air of No. 1 Coal Mine of Pingdingshan Coal Mine.