Abstract:

The roof sandstone water has effect for borehole, drainage borehole water inflow is large, that needs install large flow automatic drainage device. Based on the principles of mine negative pressure automatic drainage device work, puts forward the simple improvement method, namely mine negative pressure automatic drainage device is used as the controller, the large volume of water storage device and a large diameter water inlet or outlet, that carries out technical reform of automatic drainage device, it achieves the objective of large capacity and flow. Through field application, achieved good results.

Key words: Automatic drainage device, Large volume, Large flow, Technological reform