Reinforcement Practice of Deep Coal Seam Roadway Floor Grouting
In order to solve the problem of floor heave in deep coal seam of Yuanxiang Coal Mine,based on the engineering background of 10208 working face track trough,the types of floor heave were analyzed by combining the geological conditions of the field,and the mechanical analysis of the force on the floor of the roadway was carried out according to Rankine earth pressure theory,and the occurrence mechanism of floor heave was studied.The supporting concept of roadway roof,two sides and floor as a whole was adopted,the grouting technology was used to reinforce the floor,and the grouting parameters were designed reasonably.The practice showed that the floor heave phenomenon was effectively controlled,the stability of the roof and the two sides was guaranteed,and the deformation of the roadway can meet the safety production of the working face.
deep coal seamroadway floor heavegrouting reinforcement
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