Gas pressure rapid measuring device and measuring method

Abstract

The invention relates to the technical field of coal seam gas pressure measuring, in particular to a gas pressure rapid measuring device. The device comprises at least four hole sealing capsules, a gas injection device, a gas injection pipe, a pressure measuring pipe, and a control device. The hole sealing capsules are arranged inside a drill hole at intervals to form a second hole sealing section, a gas injection space and a first hole sealing section which are sequentially arranged in the direction from a coal seam to a drill hole opening. The first end of the pressure measuring pipe penetrates through the hole sealing capsules and the coal seam and extends to a pressure measuring gas chamber; the second end of the pressure measuring pipe is sealed or provided with a pressure gauge; thefirst end of the gas injection pipe is open and arranged inside the gas injection space; and the gas injection device is connected with the second end of the gas injection pipe which is provided withan gas injection switch. A first pressure sensor and a second pressure sensor are arranged on the pressure measuring pipe and the gas injection pipe respectively; the control device is in signal connection with the first pressure sensor, the second pressure sensor and the gas injection switch respectively; and the measuring device is suitable for the rapid measurement of underground coal seam gaspressure. The invention also provides a gas pressure rapid measuring method.

Description

technical field

[0001] The invention relates to the technical field of measuring coal seam gas pressure, in particular to a quick measuring device and a measuring method for gas pressure. Background technique

[0002] Coal seam gas pressure is one of the important parameters of gas occurrence, and it is an important basis for coal and gas outburst identification, regional prediction, outburst elimination effect inspection, etc. Accurate and rapid measurement of coal seam gas pressure is very important. Researchers at home and abroad have conducted extensive and in-depth research on the rapid measurement of gas pressure. At present, there are two types of methods for directly measuring coal seam gas pressure: one is passive pressure measurement, and the other is active pressure measurement. The passive pressure measurement method is a pressure measurement method that relies on the gas existing in the coal seam itself to recover gradually after the hole is sealed. The measure...

Examples

Embodiment 1

[0021] Such as figure 1 As shown, the gas pressure rapid measuring device in this embodiment is used to measure the gas pressure of the underground coal seam 10, and the underground construction faces the coal seam 10 direction to set up a borehole 5, and the back side of the coal seam provides a pressure measuring gas chamber 14, and the gas pressure rapid measuring device includes at least Four sealing capsules 6, gas injection device 1, gas injection tube 4, pressure measuring tube 8 and control device 3, wherein the sealing capsules 6 are arranged at intervals in the borehole 5, between two adjacent sealing capsules 6 Form the second sealing section 13, the gas injection space 12 and the first sealing section 11 which are sequentially arranged in the direction from the coal seam 10 to the opening of the borehole 5, and the first end of the pressure measuring tube 8 extends through the sealing capsule 6 and the coal seam 10 To the pressure measurement chamber 14, the second...

Embodiment 2

[0027] The gas pressure rapid measurement method uses the gas pressure rapid measurement device in Example 1.

[0028] A drilling rig is used to construct a borehole 5 with a corresponding aperture at a predetermined position, and the borehole 5 passes through the coal seam 10 or is constructed along the coal seam 10 . After the drilling 5 is completed, put the piezometric tube 8, the sealing capsule 6, and the liquid injection tube 7 into the specified position in the drilling 5, and use the liquid injection tube 7 to inject the sealing liquid 9 into the space between the capsule and the specified drilling 5 , Borehole 5 is blocked. The sealing capsules are divided into 6 and 4, and the borehole 5 is divided into a pressure measuring chamber 14, a second sealing section 13, an air injection space 12, and a first sealing section 11 from the inside to the outside. After the hole is sealed, the control device 3 is opened to monitor the gas pressure P1 of the coal seam 10 in the...

technical field

[0001] The invention relates to the technical field of measuring coal seam gas pressure, in particular to a quick measuring device and a measuring method for gas pressure. Background technique

[0002] Coal seam gas pressure is one of the important parameters of gas occurrence, and it is an important basis for coal and gas outburst identification, regional prediction, outburst elimination effect inspection, etc. Accurate and rapid measurement of coal seam gas pressure is very important. Researchers at home and abroad have conducted extensive and in-depth research on the rapid measurement of gas pressure. At present, there are two types of methods for directly measuring coal seam gas pressure: one is passive pressure measurement, and the other is active pressure measurement. The passive pressure measurement method is a pressure measurement method that relies on the gas existing in the coal seam itself to recover gradually after the hole is sealed. The measure...

Examples

Embodiment 1

[0021] Such as figure 1 As shown, the gas pressure rapid measuring device in this embodiment is used to measure the gas pressure of the underground coal seam 10, and the underground construction faces the coal seam 10 direction to set up a borehole 5, and the back side of the coal seam provides a pressure measuring gas chamber 14, and the gas pressure rapid measuring device includes at least Four sealing capsules 6, gas injection device 1, gas injection tube 4, pressure measuring tube 8 and control device 3, wherein the sealing capsules 6 are arranged at intervals in the borehole 5, between two adjacent sealing capsules 6 Form the second sealing section 13, the gas injection space 12 and the first sealing section 11 which are sequentially arranged in the direction from the coal seam 10 to the opening of the borehole 5, and the first end of the pressure measuring tube 8 extends through the sealing capsule 6 and the coal seam 10 To the pressure measurement chamber 14, the second...

Embodiment 2

[0027] The gas pressure rapid measurement method uses the gas pressure rapid measurement device in Example 1.

[0028] A drilling rig is used to construct a borehole 5 with a corresponding aperture at a predetermined position, and the borehole 5 passes through the coal seam 10 or is constructed along the coal seam 10 . After the drilling 5 is completed, put the piezometric tube 8, the sealing capsule 6, and the liquid injection tube 7 into the specified position in the drilling 5, and use the liquid injection tube 7 to inject the sealing liquid 9 into the space between the capsule and the specified drilling 5 , Borehole 5 is blocked. The sealing capsules are divided into 6 and 4, and the borehole 5 is divided into a pressure measuring chamber 14, a second sealing section 13, an air injection space 12, and a first sealing section 11 from the inside to the outside. After the hole is sealed, the control device 3 is opened to monitor the gas pressure P1 of the coal seam 10 in the...

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