Damage height of overburden rock over anti-sand & anti-collapse coal pillar in outcrop zone under condition of full-mechanized top-coal caving

According to geological conditions of anti-sand anti-collapse coal pillar in outcrop zone of Xingtai Mine,the methods of Finite Difference Simulation,Similar Material Simulating Test and Analogy Analysis are adopted to determine the damage height of overburden rock and the height of anti-sand anti-collapse coal pillar under condition of full-mechanized top-coal caving.The scheme of stage-wise step-type depth-limit caving of top-coal is selected to ensure success of mining test in 7816 stope using full-mechanized top-coal caving.The experience of test can be taken for reference by similar mines.