Abstract:

To determine the thickness of the safe aquiclude at the top roof of the temporary coal bunke and the possibility of drainage of its top aquifer in a mine in Erdos, core drilling in the spot, testing the physical and mechanical properties of the rock and the water releasing test are used. The result is that the thickness of the top roof of the temporary coal bunke and its roadway and the thickness of the broken-rock circle calculated is 11.62m. The possibility of drainage of its top aquifer is no good. At last, cutting down the height of the temporary coal bunke to the thickness of the safe aquiclude is used to ensure the safe construction of the temporary coal bunke and its roadways.

Key words: the temporary coal bunke, core drilling, water releasing test, the thickness of the safe aquiclude, possibility of drainage