Movement Rule of Top Roof and Top Coal in Horizontal Section Caving Mining in Deeply Inclined Thick Coal Seam

The movement rule of top roof and top coal is very complex in the mining of deeply inclined thick coal seam.The research on the damage and movement of top roof and top coal is rebound to confirm the difficulty degree of top coal caving,control coal slide and roof fall,confirm rational coal caving parameters,maintain rationally the roof of deeply inclined thick coal seam,get the rule of underground pressure and instruct production.The movement of top coal and top roof is discussed with the data observed from the caving mining of deeply inclined thick coal seam with horizontal section in Zhaogezhuang colliery of Kailuan Group.