High-low-pressure subarea fracturing anatonosis type coal seam water injection method
A coal seam water injection, high and low pressure technology, applied in earth square drilling, safety devices, ground mining, etc., can solve problems such as low water injection pressure, drill sticking, poor water injection effect, etc.
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[0033] The present invention provides a high-low pressure zonal fracture-increasing seepage-increasing coal seam water injection method. In order to make the purpose, technical scheme and effect of the present invention clearer and clearer, the present invention will be further described in detail below. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0034] The present invention provides a high-low pressure zonal fracture-increasing seepage-increasing coal seam water injection method, which comprises the following steps:
[0035] Such as figure 1 As shown, A, the steps of drilling, sealing and water injection in the dynamic pressure zone of the coal mining face;
[0036] Such as image 3 As shown, B, the steps of drilling, sealing and water injection in the static pressure zone of the coal mining face;
[0037] The dynamic pressure zone of the coal mining face is the ...
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