Research on United Bolt-grouting Support Technology for Roadway of Dynamic Pressure Effect
MA Sai;Jincheng Anthracite Mining Group Technology Research Institute;
In view of the effect by overlying 3~# coal and 9~# coal pillar residue stress superposition and IX4309 mining face dynamic pressure to No.2 in Sihe coal mine well 15~# coal,taking 151102 large deformation of roadway as the research object,the study is carried out by using the new type of inorganic grouting reinforcement material,united bolt-grouting support technology,mine pressure observation. The results indicate:the roadway of 151102 largest sidewall sinkage is 55 mm,the largest amount of bottom up is 46 mm,the deformation of surrounding rock of roadway is very small,ensuring the normal use of roadway safety,and improving the economic benefit.
【CateGory Index】： TD353