Measuring method for water-containing coal and rock down drill hole gas pressure observation system

A gas pressure and observation system technology, which is applied in the directions of surveying, earthwork drilling, wellbore/well components, etc., can solve problems such as water accumulation in downhole drilling, and achieve continuous and accurate measurement and reduce the effect of impact.
CN104500042AInactive Publication Date: 2015-04-08SHANDONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG UNIV OF SCI & TECH
Publication Date
2015-04-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a measuring method for a water-containing coal and rock down drill hole gas pressure observation system, and belongs to the technical field of mine gas pressure measurement. The measuring method concretely solves the problem that the gas pressure cannot be measured in a down drill hole due to water accumulation. The measuring method comprises the following steps that: firstly, a drill hole is drilled; then, experiment hardware is prepared, and the experiment hardware comprises a water permeable device, a sealing and blocking device and a pressure measuring device; next, the water permeable device is arranged in the drill hole, the gap between the water permeable device and the drill hole is filled by filling materials, and after the filling materials are cured, a pressure withstand test is performed for detection; then, the drill hole is sealed for secondary pressure withstand detection, and water in the drill hole is discharged out; and finally, the gas pressure measurement is performed through relevant auxiliary equipment. The measuring method has the advantages that the defect of influence on the gas pressure measurement caused by the water in the down drill hole can be better overcome, and the measuring method is particularly applicable to the gas pressure measurement in the water-containing coal and rock down drill hole.
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Description

Technical field

[0001] The invention belongs to the technical field of mine gas pressure measurement, and specifically relates to a measurement method of a water-bearing coal and rock gas pressure observation system. Background technique

[0002] Gas pressure is an important parameter that marks the occurrence of coal seam gas. It is a key basic parameter when studying coal and gas outburst, gas emission, and gas drainage. Therefore, in order to study the law of coal seam gas occurrence and emission, it is necessary to measure coal seam gas pressure. According to the coal industry standard MT / T638-1996 "Method for Direct Measurement of Gas Pressure in Coal Seams in Coal Mines", the pressure test drill site should be selected in the roadway adjacent to the coal seam, and in general, it is usually selected to be level with the coal seam or lower than the coal seam The roadway is used as the location of the drill site, so that the boreholes constructed are all horizontal or upward ...

Claims

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