Use: Coal injection, dust-fall, coal pressure reduction, coal-crack, methane drainage, etc.

Operation Method and Notes

1. It is very simple and convenient to use the device. It only needs to connect the device with the watercourse on the operation field, put the device into the drill hole under certain pressure, the hose will expand to come to purpose of hole sealing and coal breaking.

2. The device can be used for several times repeatedly. To unload pressure after water injection, it can restore to its original state, and then take out the hole device.

3. Forbiding to insert and retrieve the hole device with pressure.

4.Allow no person in front of the working device.