A test device and method for rapid gas measurement of coal seam permeability
A test device and permeability technology, which is applied in the direction of measurement device, permeability/surface area analysis, suspension and porous material analysis, etc., can solve the problem of damaging the objective environment of coal bodies, and can not simulate the permeability and air permeability of coal seam fracture systems. Ignoring issues such as dynamic evolution processes
Active Publication Date: 2011-12-28
SHANDONG UNIV OF SCI & TECH
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[0003] In the field of coal permeability research, many experts have proposed a variety of research methods. At present, the laboratory seepage experiment method is widely used, but this method has certain defects: ①The mining of coal samples destroys the The objective environment of the coal body; ②The laboratory seepage experiment ignores the dynamic evolution process of the coal fracture under the influence of mining; ③The laboratory seepage experiment cannot simulate the permeability and air permeability of the entire coal seam fracture system in a large range
[0004] It can be seen that the accurate coal seam permeability should be determined by on-site measurement, but until now there is still no practical and effective method at home and abroad
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[0025] A test device for rapid gas measurement of coal seam permeability, including a gas injection system and an observation system, wherein the gas injection system includes the No. 1 sealing device of the gas injection system, the No. 2 sealing device of the gas injection system, and a symbolic gas injection device; the observation system includes Observation System No. 1 Sealing Device, Observation System No. 2 Sealing Device, and Signature Gas Observation Device.
[0026] combine figure 1 , in the above-mentioned gas injection system, the No. 1 sealing device of the gas injection system includes two interconnected sealing capsules 1, 2, a pressure generating device 3, a No. 1 sealing medium accumulator 4, a high-pressure hose 5, and a pressure gauge 6 , a flow meter 7 and a one-way stop valve 8, the pressure generating device 3 is connected with the pressure gauge and the No. 1 sealed medium accumulator 4 through the pipeline, and the No. 1 sealed medium accumulator 4 is co...
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The invention discloses a test device and method for rapid gas logging of permeability of coal seam. The test device is characterized by comprising a gas injection system and an observation system, wherein, the gas injection system comprises a gas injection system first sealing unit, a gas injection system second sealing unit and a marked gas injecting unit, and the observation system comprises an observation system first sealing unit, an observation system second sealing unit and a marked gas observing unit. According to the invention, the gas injection system is employed to inject marked gas with certain pressure into a sealed releasing air chamber, and a sealed collecting air chamber in the observation system is employed to collect the marked gas and discharge the marked gas out under a fixed pressure; the concentration and the flow rate of the discharged gas are detected; and permeability of coal seam is obtained according to the relationship between the permeability of coal seam and the concentration and the flow rate of the marked gas. The invention is applicable to on-site determination of permeability of coal mine underground mining coal and provides powerful technical support for research on gas migration, exploitation of coal bed gas and the technology of coal seam infusion.
Description
technical field [0001] The invention relates to a test device for measuring the permeability of a coal seam, and a method for measuring it; in particular, it relates to a test device for quick gas testing of coal seam permeability and a method for quick gas testing of coal seam permeability. Background technique [0002] As a porous medium, coal body has certain permeability, that is, fluid with certain particles can permeate into coal body, and even flow through coal body and transfer to the next medium. Coal is more of a naturally occurring solid in which gas and water exist. Coal seam permeability, as a common index to describe the difficulty of coal seam water injection, is also an important physical parameter of the degree of ease of gas flow in coal seams, which reflects the difficulty of entering coal cracks and pores when water is injected. Due to the complex composition of coal seam fractures, the water transport properties of coal seams vary greatly in various par...
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Login to View More IPC IPC(8): G01N15/08G01N7/00
Inventor 程卫民王刚周刚于岩斌陈连军亓玉栋聂文
Owner SHANDONG UNIV OF SCI & TECH