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

Active Publication Date: 2012-01-18
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to effectively solve the problem of difficult water injection in high ground pressure and low porosity coal seams, the present invention proposes a fluctuating water injection process for high ground pressure low porosity coal seams and a device for implementing the process

Method used

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  • Coal seam water infusion device with high ground pressure, low porosity and low permeability and using process thereof
  • Coal seam water infusion device with high ground pressure, low porosity and low permeability and using process thereof
  • Coal seam water infusion device with high ground pressure, low porosity and low permeability and using process thereof

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Embodiment Construction

[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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Abstract

The invention relates to a coal seam water infusion device with high ground pressure, low porosity and low permeability, which comprises a static pressure water infusion device and a dynamic pressure water infusion device. The static pressure water infusion device comprises a static pressure water infusion supply pipe, a static pressure main pipeline stop valve, a first differential pressure typepenetrant continuous and quantitative adding pump, a static pressure flow divider, a static pressure branch pipeline, a static pressure branch pipeline stop valve and a static pressure flow meter. The dynamic pressure water infusion device comprises a dynamic pressure water infusion supply pipe, a water storage tank, a second differential pressure type penetrant continuous and quantitative addingpump, a water return pipe, a water infusion pump, a water quality filter, a pressure gauge, a dynamic pressure main pipeline stop valve, a dynamic pressure flow divider, a dynamic pressure branch pipeline, a dynamic pressure branch pipeline stop valve and a dynamic pressure flow meter.

Description

technical field [0001] The invention relates to the field of disaster prevention and control of coal mining working faces in coal mines, in particular to a water injection device for coal seams with high ground pressure, low porosity and low permeability and its application process. Background technique [0002] With the increase of coal mining depth and the improvement of mechanized mining in my country, the hazards of natural disasters such as coal dust, rock burst and ground temperature are constantly escalating, and disasters and accidents occur frequently, which seriously threaten the safe and efficient mining of coal mines in my country and the safety of underground workers. Physical and mental health. Coal seam water injection is an important technical means to prevent various disasters in mines. Water injection through the coal seam can effectively reduce the dust production when the coal body is broken, prevent the occurrence of shock mine pressure, coal and gas out...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F5/02
Inventor 程卫民聂文杨子祥周刚高昌同于岩斌陈连军王刚崔向飞杨俊磊马有营
Owner SHANDONG UNIV OF SCI & TECH
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