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Coal seam gas pressure multipoint-accurate measuring device and working method thereof

A coal seam gas pressure and measuring device technology, which is applied in the directions of measurement, earthwork drilling, wellbore/well components, etc., can solve problems such as leakage, achieve the effect of improving accuracy and realizing automatic control

Active Publication Date: 2021-11-05
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a multi-point-accurate measuring device for coal seam gas pressure and its working method. The present invention can measure the multi-point gas pressure in the coal seam at one time and solve the problem of gas leakage in the process of coal seam gas pressure measurement. , improve the accuracy of coal seam gas pressure measurement results, and realize automatic control of the coal seam gas pressure measurement process

Method used

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  • Coal seam gas pressure multipoint-accurate measuring device and working method thereof
  • Coal seam gas pressure multipoint-accurate measuring device and working method thereof
  • Coal seam gas pressure multipoint-accurate measuring device and working method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Such as Figure 1-6 As shown, a coal seam gas pressure multi-point-accurate measurement device, including N groups of sealing unit 1, grouting unit and pressure measurement and control unit, N≧2, drilled in the coal seam is equipped with pressure hole 2. N sets of sealing units 1 are arranged at intervals from the bottom of the pressure measuring hole 2 to the direction of the orifice and are arranged in the pressure measuring hole 2 and connected end to end in sequence. N groups of sealing units 1 seal the pressure measuring hole 2 after grouting The pressure measuring holes 2 are separated to form N pressure measuring air chambers, the grouting units are respectively connected to N groups of sealing units 1, and the pressure measuring control units are respectively connected to the N pressure measuring air chambers.

[0042] The grouting unit includes a sealing grouting pump 3 and a plugging grouting pump 4. The grouting port of the sealing grouting pump 3 is connect...

Embodiment 2

[0057] The difference from Example 1 is that, if Figure 7 As shown, each group of sealing units 1 includes a sealing grouting pipe 29, a porous pipe 8 and M grouting pockets 9, M≧3, the sealing grouting pipe 29 and the porous pipe 8 are arranged side by side, and the porous pipe 8 There are plugging grouting channels 11 and N pressure measuring channels 12 inside. Each grouting pocket 9 is coaxially covered and fixed on the outside of the porous tube 8. The sealing grouting tube 29 runs through and connects each grouting pocket in turn. 9. The sealing grouting pipe 29 in each grouting pocket 9 is provided with a first grouting hole, and a first one-way valve 32 is installed in the first grouting hole, and all the grouting pockets 9 are grouted Finally, M-1 annular grooves are formed between each grouting pocket 9, wherein at least one annular groove is selected as the plugging grouting groove 33, and the remaining annular grooves are used as the plugging grouting groove 34, a...

Embodiment 3

[0061] All different from Embodiment 1 and Embodiment 2, such as Figure 8 As shown, each group of sealing units 1 includes a sealing grouting pipe 29, a plugging grouting pipe 30, a porous pipe 8 and M grouting pockets 9, M≧3, and each grouting pocket 9 is coaxial Coated and fixed on the outside of the porous pipe 8, the sealing grouting pipe 29 and the plugging grouting pipe 30 all run through and connect each grouting pocket 9 in turn, and the sealing grouting pipe 29 in each grouting pocket 9 is A first grouting hole is provided, and a first one-way valve 32 is installed in the first grouting hole. After all the grouting pockets 9 are grouted, M-1 annular grooves are formed between each grouting pocket 9, Wherein at least one annular groove is selected as the plugging grouting groove 33, and the remaining annular grooves are used as the plugging grouting groove 34, and the plugging grouting pipe 30 in the plugging grouting groove 33 is provided with a second grouting hole,...

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Abstract

The invention relates to a coal seam gas pressure multipoint-accurate measuring device. The coal seam gas pressure multipoint-accurate measuring device comprises N groups of hole sealing units, a grouting unit and a pressure measuring regulation and control unit, wherein N is larger than or equal to 2, a pressure measuring hole is drilled in a coal seam, the N groups of hole sealing units are arranged in the pressure measuring hole at intervals in the direction from the hole bottom to the hole opening of the pressure measuring hole and are sequentially connected end to end, after grouting, the N groups of hole sealing units seal the pressure measuring hole and divide the interior of the pressure measuring hole into N pressure measuring gas chambers, the grouting unit is connected with the N groups of hole sealing units, and the pressure measuring regulation and control unit is connected with the N pressure measuring gas chambers. According to the coal seam gas pressure multipoint-accurate measuring device, the multipoint gas pressure in the coal seam can be measured at one time, the problem of gas leakage in the coal seam gas pressure measuring process is solved, the accuracy of the coal seam gas pressure measuring result is improved, and the automatic control over the coal seam gas pressure measuring process is realized.

Description

technical field [0001] The invention relates to the technical field of coal mine gas pressure testing, in particular to a multi-point-accurate measuring device for coal seam gas pressure and a working method thereof. Background technique [0002] The current direct test method of coal seam gas pressure mainly relies on the high-efficiency sealing of the borehole, and the gas pressure of the coal seam is obtained by forming a pressure chamber. Among them, the commonly used gas pressure measurement and sealing methods are: yellow mud-clay sealing pressure measurement method, rubber ring sealer pressure measurement method, "two plugging and one injection" hole sealing pressure measurement method, whole hole section grouting-sweeping Hole-sealed pressure measurement method, the above-mentioned sealed hole pressure measurement method can only form a pressure measurement chamber, once leakage of high-pressure gas measured in the pressure measurement chamber occurs, it will lead to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/06E21B33/13
CPCE21B47/06E21B33/13
Inventor 王志明孙玉宁张硕丁立培孙志东宋维宾
Owner HENAN POLYTECHNIC UNIV