Study on mechanism and control technology of the floor heave in the high stress soft rock roadway

摘要

Floor heave is common dynamic phenomenon of mine pressure appear in coal mine roadway, and the normal use of roadway was affected.Based on floor heave problem of the middle-strip track roadway at Xin-jing Coal Mine as research background.Based on theoretical analysis methods, analyzed the influence factors of floor heave and studied the causes and mechanism of floor heave.The results show that the rock bottom water, the swelling clay of rocks, and high stress were the main influence factors of floor heave.The amount of the floor heave was constituted by the elastic-plastic deformation, water swelling deformation, rock dilatancy, creep;active control surrounding rock deformation and waterproof were the key to control the floor heave.Bolting and grouting technology of anchor beam with grouting in the floor of roadway were implemented in the field, the Roadway Floor Heave was controlled in 50 mm after six months, The roof and the two sides have little deformation, the field implementation indicates that the technique effectively controls of the roadway floor heave and provides a reference for the similar conditions of the mine roadway.