Practices and control technology on floor heave prevention of soft rock roadway in Xiashijie coalmine

According to the floor heave of the soft roadway in Xiashijie Coal Mine, analyse the geological conditions, generalize the cause induce the floor heave, and an effective support technique was designed to control the floor heave. At last, engineering application of the support technique in Xiashijie Coal Mine show that it is effective and practical.