Bidirectional Waterproof Gate Chamber and Automatic Control System Design in Daizhuang Coal Mine

The lower group coal mining in 1160 mining area and 2160 mining area of Daizhuang Coal Mine is threatened by Ordovician limestone water. The coal in 2160 mining area shall be transported to -580 belt transportation system by 1160 belt conveyor, and according to Coal Mine Safety Regulations, waterproof gate should be built in belt conveyor roadway; in order to isolate the water inrush disaster area, it is decided to build a bidirectional waterproofing gate chamber. Considering improving the level of mine automation and reducing the labor intensity of workers, it is decided to design an automatic control system of waterproof gate combining with programmable control technology to in-site automatic and remote control of waterproof gate on site. After completion, the grouting pressure resistance test and quick closing test were carried out to verify that the grouting can close the waterproof gate quickly within 50 s without leakage, which can be used in the actual production of underground coal mines.