A high-power electric detonation-assisted hydraulic fracturing anti-permeability method in underground coal mines
A hydraulic fracturing, high-power technology, applied in mining equipment, earthmoving, wellbore/well components, etc., can solve the problems of small drilling radius, small crack extension, and poor fracturing effect. , to achieve the effect of shortening the pre-extraction time, increasing the number of cracks, and having a good application prospect
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[0015] Below in conjunction with accompanying drawing, the example of the present invention is further described:
[0016] like figure 1 As shown in the present invention, the high-power electric detonation-assisted hydraulic fracturing and permeability enhancement method in a coal mine is as follows:
[0017] (1) Drilling holes 2 are constructed from the roadway to the coal seam 1. After the drilling holes 2 are completed, the fracturing steel pipe 3 with the high-voltage pulse arrester 4 installed at the front end is sent to the bottom of the drilled holes 2, and the pipes connected to the high-voltage pulse arrester 4 are drawn out. Cable 8, connect the cable 8 to the high-voltage electric pulse generator 9, install the hole sealer 5 at 2-3m from the hole of the drill hole 2, seal the hole between the fracturing steel pipe 3 and the drill hole 2, The exposed end of the fracturing steel pipe 3 is connected to the high-pressure pump station 7 with a high-pressure rubber hose...
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