Coal seam static expansion, cracking and antireflection equipment and method

A static expansion, coal seam technology, applied in chemical instruments and methods, earthwork drilling, mining fluids, etc., can solve the problems of high economic cost of hydraulic fracturing and permeability enhancement, poor safety of explosive blasting and permeability enhancement, etc., to ensure connectivity, Low cost and the effect of saving production costs

Active Publication Date: 2020-08-14
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problems of poor safety of explosive blasting and high economic cost of hydraulic fracturing in the method of increasing permeability of coal seams, the present invention discloses a static expansion fracturing and anti-permeability equipment and method for coal seams

Method used

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  • Coal seam static expansion, cracking and antireflection equipment and method

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Effect test

Embodiment 1

[0035] Such as figure 1 As shown, a coal seam static expansion fracturing anti-permeability equipment includes a grouting vehicle and a grouting pipeline. Above the chassis 5 of the grouting vehicle, a grouting pump 4 and an expansion agent hopper for holding a drag-reducing expansion agent are arranged. 2, the acidolysis agent material box 3 that holds the acidolysis agent, the bottom of the above-mentioned expansion agent material box 2 is provided with an expansion agent discharge port, the bottom of the acidolysis agent material box 3 is provided with an acidolysis agent discharge port, and the expansion agent The outlet of the agent and the outlet of the acidolysis agent are respectively connected to the liquid inlet of the grouting pump 4 through the pipeline 8; The pipeline includes several sections of connected swivel pipes 9 arranged in the boreholes of the coal seam 11 , and a plurality of grouting holes 10 are opened on the pipe wall of each section of the swivel pi...

Embodiment 2

[0043] The invention also discloses a coal seam static expansion cracking and anti-permeability method. The coal seam anti-permeability enhancement method of a certain number of coal seam working face in a certain mine is used as the project Beijing, and the coal seam static expansion and cracking anti-permeability equipment disclosed in the embodiment is adopted, which specifically includes the following steps :

[0044] Step 1. Determining the strength of the coal body and selecting the specifications of the acid hydrolysis capsule

[0045] Several groups of coal samples were collected at the site of a working face, and basic mechanical tensile tests were carried out to measure the tensile strength K of the coal body c Equal to 10MPa, therefore, the selected acid hydrolysis capsule specification is that the compressive strength of the capsule is equal to 10MPa.

[0046] Step 2. Layout drilling and connecting pipelines

[0047] First, a mine drilling rig is used to lay a 35...

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Abstract

The invention discloses coal seam static expansion, cracking and antireflection equipment and method. The coal seam static expansion, cracking and antireflection equipment comprises a grouting truck and a grouting pipeline. A grouting pump, an expansion agent tank, an acidolysis agent tank are arranged on the upper part of the grouting truck, an expansion agent discharging outlet is formed in thebottom of the expansion agent tank, an acidolysis agent discharging outlet is formed in the bottom of the acidolysis agent tank, and the expansion agent discharging outlet and the acidolysis agent discharging outlet are separately connected with a liquid inlet of the grouting pump; and the grouting pipeline is connected with a liquid outlet of the grouting pump through a pipeline, and the groutingpipeline comprises a plurality of sections of rotating pipes connected to one another and arranged in a coal seam borehole. The coal seam static expansion, cracking and antireflection equipment has the beneficial effect that through mechanized operation, a drag reducing expansion agent is injected into the coal seam borehole to produce static expansion, the coal seam is promoted to rupture and generate cracks, then chemical decomposition is carried out through a decomposer to clean drag reduction expansion agent defective materials in the coal seam borehole, the connectivity between the borehole and the surrounding coal seam crack channels is ensured, and the coal seam static expansion, cracking and antireflection equipment has the advantages of low economic cost and high safety factor.

Description

technical field [0001] The invention relates to the technical field of coal mine safety, in particular to a coal seam static expansion cracking anti-permeability equipment and method. Background technique [0002] Gas disaster is a thorny issue that restricts the safety production of coal mines in our country. Gas drainage is a technology for extracting coal seam gas by arranging boreholes in the coal seam, which can effectively reduce the gas content of the coal seam and the amount of gas gushing out of the working face. However, most of the coal seams have poor natural gas permeability, and the direct extraction of gas is usually unsatisfactory. Therefore, before coal seam gas drainage construction, coal seam permeability enhancement construction is usually required. [0003] Permeability enhancement means to increase the air permeability of the coal seam by artificial techniques. At present, the traditional anti-reflection technologies in coal mines are mainly divided ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26C09K8/66C09K8/68C09K8/72C09K8/88
CPCE21B43/26C09K8/665C09K8/68C09K8/72C09K8/882
Inventor 黄启铭王刚程卫民孙路路刘义鑫杜文州
Owner SHANDONG UNIV OF SCI & TECH
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