Abstract:

Studied the top-coal movement and running of full-mechanized caving mining in which Pingshuo mining area,the simulation experiment on the rule of top-coal movement and running was done for the Pingshuo 4# , 9# coal ,obtained the relation of coal-gangue content and top coal drawing ratio in the different of mining and caving ratio,and the different exploitation method.The experimental data show that the reasonable exploitation method at Pingshuo mining area is one cut by one drawing. In the process of coal caving ,it can take 1/5 of gangue ratio among coal-gangue flow on drawing jaws as the criterion of ending drawing top coal.

Key words: full-mechanized caving mining, mining and caving ratio, refuse content, top coal caving technology