It can restore to its original state,and then take out the hole device. It can reduce the 80%dust,improve working environment.

 I  use: coal injection ,dust-fall,coal preesure reduction,coal-crack,methane drainage,etc

II.            Function

1.       moisture enters into coal mass,releasing some gas,and reducing the gas content in the coal body;

2.       It can reduce the 80%dust,improve workers working environment,and complertely eradicate dust explosion accidents when water injection reaches the desired impact.

3.       wetting coal mass to prevent the spontaneous ignition of coal body;

4.       high pressure water injection ,breaking coal mass ,reducing cost, and enhancing the workers feeling of safety;

5.       use the hole sealing device to efficiently prevent the gas stress and explosion.

III. structure:

   It is made of high pressure expansion hose ,safety valve ,and rapid-acting coupling.

IV. technical parameter

   Hole-sealing diameter : 30-120mm(also can be processed according to the customers needs)

   Working pressure :1-8MP( processed according to th ecustomers needs)

   Start-up pressure of the safety valve :0.4-0.5Mpa

Working flow:4-4.5tons of water per hour

   Depth of hole-sealing :1m-8m

   Expansion coefficient of the hose: 60%-100%

V. Operstaion 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,Uder 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.Foebiding to insert and restrive the hole device with pressure.

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

VI. Carried Standard :GB/T 10544-2003

Water Injection and Hole-Sealing Device for Coal