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Water injection dust reduction method for cracking and moistening coal seam through intelligent circulating filling of liquid carbon and water

A coal seam and fracturing technology, which is applied in the field of coal seam fracturing, moisturizing, intelligent cycle filling and dust reduction, can solve the problems of unsatisfactory water injection dust reduction effect, high manual labor intensity, long water injection cycle, etc., to achieve improved efficiency and intelligence Level, wide monitoring range, good effect

Active Publication Date: 2022-03-08
CHINA UNIV OF MINING & TECH
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AI Technical Summary

Problems solved by technology

However, most of the coal seams in my country are hard-to-water-injection coal seams, which are characterized by high in-situ stress, low porosity, and poor permeability. The cycle is long, the labor intensity is high, and the effect of water injection and dust reduction is not ideal

Method used

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  • Water injection dust reduction method for cracking and moistening coal seam through intelligent circulating filling of liquid carbon and water
  • Water injection dust reduction method for cracking and moistening coal seam through intelligent circulating filling of liquid carbon and water
  • Water injection dust reduction method for cracking and moistening coal seam through intelligent circulating filling of liquid carbon and water

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Embodiment Construction

[0023] First, the advancement surface 60m uses the ZDY120S type coal mine along the coal seam tilt, the hydraulic drilling machine construction, the number 1 # ~ 6 #, the opening position is 2.5m from the top bottom plate, drilling diameter φ 1 = 80mm, drilling pitch is 25m, the drilling length is determined to be 120m according to the length of the working surface length, the water seam water permeability, and the direction of drilling direction. When the main bore is reached to the design depth, the main drilling is round, using the KHYD-140 type horizontal directional drilling rig 360 ° uniformly arranged 6 branch drilled holes, and the branch drilling axial direction is 15 m;

[0024]Next, computer intelligent decision and analysis device installed with a modular special package is connected to the AFPX-AD2 type PLC controller, computer intelligent decision and analysis device can achieve monitoring data correction, conversion and positive inversion analysis. Calculation, the ...

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Abstract

The invention discloses a water injection and dust reduction method for fracturing and moistening a coal seam through intelligent circulating filling of liquid CO2 (liquid carbon)-water, which comprises the following steps of: filling liquid carbon in a dynamic pressure manner after a water injection drill hole is constructed on an advanced working face, and constructing a strain-temperature monitoring drill hole and a moisture detection drill hole at proper positions of the coal seam so as to monitor a liquid carbon fracturing range and a pressure water effective wetting area in real time; monitoring data are transmitted back to the intelligent analysis and decision-making device to be analyzed and processed, a control command is given, liquid carbon and a water filling valve are adjusted through a PLC system to carry out circulating filling operation, and the purpose of intelligent source dust reduction is achieved by cracking and moistening the coal body repeatedly and repeatedly. According to the method, advanced technologies such as strain-temperature monitoring and moisture moistening detection are comprehensively applied, an automatic control principle and an artificial intelligence method are combined, a set of complete perception-transfer-decision-control system is formed, the water injection dust reduction efficiency is expected to be remarkably improved, and a new reform and intelligent scheme is expected to be provided for mine dust prevention and control.

Description

Technical field [0001] The present invention relates to a method of dust removal of smart cycle of coal seam, especially a liquid Co 2 Method for improving the dust removal effect of coal seam injection. [0002] technical background [0003] As one of the five major disasters of the coal mine, the production operations such as mining, support, blasting, loading and transportation will be largely generated, and is a common problem facing all production mines. Mine is the most serious occupational hazard of mines, which extensively causing dustpac disease, making the suffering workers suffering from death; mine dust is one of the most important natural disasters in mines, often leading to explosive accidents, serious threats in safe production. In recent years, with the improvement of the mining mechanization, the mining strength and production concentration increased significantly, the dust and dust concentration have also risen sharply. [0004] Coal grade water is a pre-preventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F5/02E21B7/04E21B43/26E21B33/03E21B47/06E21B33/13E21B49/00E21B44/00
CPCE21F5/02E21B7/04E21B43/2605E21B43/2607E21B43/006E21B33/03E21B47/06E21B33/13E21B49/00E21B44/00Y02P90/70
Inventor 王和堂何军程思思赵侠章琦
Owner CHINA UNIV OF MINING & TECH
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