Study on Rapid Reinforced Technology with Pre- -Stressed Anchor for Floor of Mine Roadway in Deep Mine

In order to solve a high difficult problem of the floor heave control in the mine roadway of the deep mine,the paper analyzed factors to restrict the develo pment of the floor reinforcement technology and provided the method and technique of the floor pre-stressed anchor reinforcement.The paper stated the mixing head,an choring agent and packer affected to the anchoring effect. The experiment results showed that the steel tube resin anchoring cartridge with fixed mixing head and the an choring agent with large diameter fast and slow mixing would have a best anchoring effect and could meet the initial support requirements of the pre-stressed anchor for the floor of the mine roadway.With the special packer,the free section of the anchor could be pressurized grouted to enhance the strength of the floor surrounding rock and to ensure the anchoring performances of the floor anchor.The reinforcement of the pre-stressed anchor would not only make the floor anchor timely and actively loa ding,but could make the floor surrounding rock and the anchoring performances enhanced.Thus the integration of the floor surrounding rock could be maximally kept to ensure the reinforcement effect and reduce the support cost.