Measurement probe for measuring parameters of gas inside coal bed

Abstract

The present invention relates to a measurement probe for measuring the parameters of gas inside a coal bed. The measurement probe comprises a conical head, a pressure measurement pipe, a first probe main pipe and a plurality of second probe main pipes, wherein the above parts are sequentially and detachably connected from left to right. During construction, the workload is small. Due to the extrusion effect of the coal mass and the probe, when the probe is nailed into the coal mass at a certain distance, the self-sealing effect is realized. Therefore, the real gas pressure at the location of the pressure measurement pipe of the measurement probe can be measured. The required test time is short. Meanwhile, not only the gas pressure measurement cycle is shortened, but also the success rate of pressure measurement is improved. Moreover, during the nailing process of the probe into the coal mass, the destroy type of the coal mass can be judged according to the difficulty degree of the nailing operation. Therefore, the measurement probe provides data for the measurement of gas-related parameters. The measurement probe is high in practicability and worthy of popularization.

Description

technical field [0001] The invention belongs to the technical field of coal mines, and in particular relates to a probe for measuring gas parameters in coal seams. Background technique [0002] At present, the measurement methods of relevant parameters of coal seam gas have various defects. For example, the current measurement of coal seam gas pressure can only be carried out by drilling and sealing holes in the coal seam. This method has a large construction workload and a long measurement period. The effect of sealing holes is difficult to guarantee, and the pressure cannot be measured due to easy air leakage; the coal body hardness measurement needs to be sampled in the coal seam and tested by the drop hammer method in the laboratory, and its disadvantage is that the workload is large and the error is large; The degree of damage can only be judged by observation, which has large errors, strong subjectivity, and cannot be quantitatively reflected. Contents of the inventi...

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Problems solved by technology

[0002] At present, the measurement methods of relevant parameters of coal seam gas have various defects. For example, the current measurement of coal seam gas pressure can only be carried out by drilling and sealing holes in the coal seam. This method has a large construction workload and a long measurement period. The effect of sealing holes is difficult to guarantee, and the pressure cannot be measured due to easy air leakage; the coal body hardness measurement needs to be sampled in the coal seam and tested by the drop hammer method in the laboratory, and its disadvantage is that the workload is large and the error is large; The degree of damage can only be judged by observation, with large errors, strong subjectivity, and no quantitative response

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