Detection Study of Overlying Strata Failure Types in Shendong Mining Area

Shendong mining area mainly mine Jurassic coal seam, and due to complexity of change of the working face overburden rock loose bed thickness, bedrock thickness and depth, and great change of mine hydrogeology conditions.it has happened face water inrush, collapse sand accident so many times.The paper takes the research method of detecting working face overlying strata failure heght as main method, and firstly points out that three strata damage types including overlying strata failure two belts distribution, overlying strata failure normal three belts distribution and ultra-high water flowing fractured belt distribution method.