Analysis on Influence Factors of Roadway Instability in High-Stress, Steeply Inclined Extra-Thick Coal Seam

In order to solve the problem of roadway support safety in coal mining under high stress conditions and improve safe efficient production mines, control countermeasures surrounding rock stability optimization scheme are put forward model numerical simulation bolt system established. Based on theory instability mechanism dynamic system, this paper puts evaluation effect parameters support, mine pressure monitoring corresponding The roof fall accident cable have been broken Wudong mine, phenomenon pulling out roadway. causes analyzed solutions forth, judging influence different factors support. view North Lane east wing +575 level 43 #coal seam north area cause analysis suggestions made. And, according performance bolting material anchoring agent, laboratory theoretical research was carried out. Through experiment, it is concluded that FRP with a diameter not less than 27 mm first choice for side working face roadway, then ribbed steel 20 nonworking face, length anchor rod range loose circle. Therefore, full-length should be anchorage increased, integrity improved, so as reduce amount separation effect.