Coal seam water infusion device with high ground pressure, low porosity and low permeability and using process thereof
A technology of coal seam water injection and low permeability, which is used in safety devices, mining equipment, earth-moving drilling, etc. The effect of small dust production
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[0024] See attached figure 1 , which shows a working schematic diagram of hydrodynamic water injection into the hydrostatic zone of a coal seam.
[0025] Determine the dynamic pressure zone and static pressure zone (also known as the original stress zone) of the coal seam in the coal mining face according to the mine pressure measurement results of the coal seam in the coal mining face, and set up one every 10-25m in the coal seam original stress zone The water injection hole, the length of the water injection hole is 1 / 2 to 2 / 3 of the length of the working face, the diameter of the hole is 40 to 80mm, and the angle is basically the same as the angle of the coal seam. Insert the water injection pipe) into the water injection hole. The 1-3 joints at the end of the water injection pipe are flower tubes, and a hole sealing device is installed at a distance of 6-15m from the entrance of the water injection hole. Proportionally prepared marijuana to prevent the injected water from...
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