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Zhengzhou Huazhi Technology Co., Ltd
M-IV active gas pressure measuring instrument
NegotiableUpdate on 06/02
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Overview
M-IV active gas pressure measuring instrument
Product Details
M-IV active gas pressure measuring instrumentProduct Introduction
The active gas pressure gauge is the driving force and calibration parameter for gas emission and outburst Accurately measuring the pressure of coal seam gas is of great significance for formulating reasonable and effective measures to prevent and control gas in mines, and predicting the danger of coal and gas outbursts The commonly used coal seam gas pressure measurement techniques are mostly effective under the condition of hard and dense rock layers in the sealing section. However, due to the limitations of sealing materials, the sealing effect is not ideal for soft sandstone or micro cracks around the borehole, which is prone to gas leakage and results in a gas pressure value lower than the true gas pressure of the coal seam. This can lead to erroneous judgments and potential accidents
M-IV active gas pressure measuring instrumentEquipment principle
The active pressure measurement and sealing method is a sealing method proposed by Academician Zhou Shining of the Chinese Academy of Sciences for measuring coal seam gas pressure The sealing principle of this method is to use expansion capsules to seal the holes at both ends, and inject sealing mucus with a pressure slightly higher than the coal seam gas pressure in the middle. Under pressure, the mucus can not only penetrate the cracks between the borehole and the capsule, but also the sealing mucus with a pressure slightly higher than the coal seam gas pressure. Under pressure, the mucus can not only penetrate the cracks between the borehole wall and the capsule, but also the cracks in the borehole pressure relief ring and the natural cracks around the borehole, preventing gas leakage This forms an active sealing method of capsule sealing mucus and mucus sealing gas, so that the measured gas pressure value is equal to the true gas pressure of the coal seam Our company has undergone multiple upgrades and modifications to the product, making it easier to install and use.
After the sealing is completed, inert gas is actively injected into the gas pressure chamber, and the measured value is the true gas pressure of the coal seam The active pressure measurement and sealing method shortens the testing time, with each point testing time not exceeding 3 days, which is 1/10-1/5 of the testing time of conventional pressure gauges. This measuring instrument uses a new type of sealing material and is suitable for directly measuring gas pressure in coal seam bedding tunnels The instrument is easy to use, simple to operate, fast to measure, convenient to transport, accurate and reliable in measurement results, and easy to maintain. This measuring instrument can be reused repeatedly and is economically applicable.
M-IV active gas pressure measuring instrumentTechnical parameters
Rated pressure: 6MPa (6-20MPa, customized)
Sealing hole diameter: Φ 50-55mm, or Φ 70-90mm
Sealing depth: 15-20m
Sealing length: 6-10m
Sealing mucus segment length: 2-6m
Capsule size: Φ 42 × 2000 mm or Φ 63 × 2000 mm
Sealing mucus composition: bentonite+water
Robustness coefficient of coal seam in the sealed section: f ≥ 0.5
Measurement time: usually 2-4 days
Length of each steel pipe section: 2-2.35m
Host dimensions (length x width x height): 450 x 300 x 580mm
Weight: 50Kg
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