Coal petrography water-acid high-pressure presplitting, softening, impact prevention and permeability improvement complete equipment and method

A high-pressure pre-cracking, coal-rock technology, applied in the field of coal-rock water-acid high-pressure pre-cracking softening, anti-scouring and anti-reflection complete equipment, which can solve the problems of multiple equipment, troublesome operation, and high cost

Active Publication Date: 2020-06-05
XIAN UNIV OF SCI & TECH +1
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Problems solved by technology

[0003] The traditional method is single water injection first, and then single acid injection. The pressure of acid injection is relatively small. The acid solution needs to be stored on the ground and stored in tanks, and then transported to the underground and inj

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  • Coal petrography water-acid high-pressure presplitting, softening, impact prevention and permeability improvement complete equipment and method
  • Coal petrography water-acid high-pressure presplitting, softening, impact prevention and permeability improvement complete equipment and method
  • Coal petrography water-acid high-pressure presplitting, softening, impact prevention and permeability improvement complete equipment and method

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[0035]The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0036] see Figure 1-7 , the present invention provides coal rock water-acid high-pressure pre-cracking softening anti-scouring anti-reflection complete set of equipment and method technical scheme: including drilling system 1, measurement and control system 2, sealing system 3 and water-acid coupling pressurization system, drilling system 1 It includes a tunnel drilling rig 101, a drill pipe 102 and a drill bit 105, which are used to drill holes in hard coal rocks ...

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Abstract

The invention discloses coal petrography water-acid high-pressure presplitting, softening, impact prevention and permeability improvement complete equipment and method. The complete equipment comprises a drilling system, a measuring and control system, a hole sealing system, and a water-acid coupling pressurizing system; the drilling system comprises an underground drill rig, a drill rod and a drill bit; the measuring and control system comprises a gamma ray logger and a drilling peeper for recording drilling position parameters, lithology and fracture development conditions and detecting a presplitting effect; the hole sealing system comprises a segmented fracturing hole sealer; and the water-acid coupling pressurizing system comprises a high-pressure water pump assembly, a gas booster pump assembly, a gas-water mixing pipe assembly and a porous parallel liquid supply pipe network. The complete equipment merges water injection and acid injection; a high-pressure carbon dioxide injecting pump is added; carbon dioxide gas is directly injected in a high-pressure gas and water mixing pipe; acid is injected after pumping, so that corrosion of a high-pressure water pump by acid is prevented, and high-pressure acid injection is implemented; the water pump is singly opened to implement hydraulic fracturing; the carbon dioxide injecting pump is singly opened to implement high-pressuregas splitting; and the two are opened at the same time to implement acid fracturing.

Description

technical field [0001] The invention relates to the technical field of coal mine safety, in particular to a complete set of equipment and method for coal rock water-acid high-pressure pre-cracking, softening, anti-scouring and anti-reflection enhancement. Background technique [0002] During coal mining, the coal body is often dense and hard, with poor air permeability, resulting in low cutting efficiency of the shearer, difficulty in releasing the top coal, difficulty in gas drainage in the coal seam, easy accumulation of gas, and gas accidents. Another situation is the hard roof above the coal body. After the mining of the working face, the goaf has a large suspended roof area, and a large amount of elastic energy of the rock mass accumulates, which is easy to form a large area of ​​roof pressure and rock burst. [0003] The traditional method is single water injection first, and then single acid injection. The pressure of acid injection is relatively small. The acid solut...

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Application Information

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IPC IPC(8): E21B43/27
CPCE21B43/26E21B43/261
Inventor 李根威邓广哲张旭东王健航赵世振
Owner XIAN UNIV OF SCI & TECH
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