CN103225492A - Long-distance belt pressure hole sealing method of gas extracting drill hole - Google Patents

Long-distance belt pressure hole sealing method of gas extracting drill hole Download PDF

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Publication number
CN103225492A
CN103225492A CN 201310173298 CN201310173298A CN103225492A CN 103225492 A CN103225492 A CN 103225492A CN 201310173298 CN201310173298 CN 201310173298 CN 201310173298 A CN201310173298 A CN 201310173298A CN 103225492 A CN103225492 A CN 103225492A
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CN
China
Prior art keywords
hole
sealing
polyurethane
mixed liquor
hole sealing
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Pending
Application number
CN 201310173298
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Chinese (zh)
Inventor
随贺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
QIDONG COAL MINE ANHUI HENGYUAN COAL INDUSTRY AND ELECTRICITY POWER Co Ltd
Original Assignee
QIDONG COAL MINE ANHUI HENGYUAN COAL INDUSTRY AND ELECTRICITY POWER Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by QIDONG COAL MINE ANHUI HENGYUAN COAL INDUSTRY AND ELECTRICITY POWER Co Ltd filed Critical QIDONG COAL MINE ANHUI HENGYUAN COAL INDUSTRY AND ELECTRICITY POWER Co Ltd
Priority to CN 201310173298 priority Critical patent/CN103225492A/en
Publication of CN103225492A publication Critical patent/CN103225492A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a long-distance belt pressure hole sealing method of a gas extracting drill hole. The long-distance belt pressure hole sealing method of the gas extracting drill hole is characterized in that a hole sealing structure comprises a gas extracting-discharging pipe located on a hole sealing centre shaft, a hole polyurethane mixed liquor conveying pipe bound on the gas extracting-discharging pipe and a hole inside polyurethane mixed liquor conveying pipe and an expanded cement slurry conveying pipe; the polyurethane mixed liquor is conveyed into a sealed hole via the hole polyurethane mixed liquor conveying pipe and the hole inside polyurethane mixed liquor conveying pipe to form a hole polyurethane hole sealing section and a hole inside polyurethane hole sealing section and form an expanded cement hole sealing section between the hole polyurethane hole sealing section and the hole inside polyurethane hole sealing section; and the expanded cement slurry is conveyed to the expanded cement hole sealing section via the expanded cement slurry conveying pipe in order to finish the hole sealing operation. By adopting the long-distance belt pressure hole sealing method of the gas extracting drill hole disclosed by the invention, the hole sealing length is extended to more than 10 meters and is far high than the prior art; and the high-pressure slurry pouring and hole sealing of the intermediate region are realized by quickly reacting the foamed and congealed polyurethane hole sealing section, so that the long-distance belt pressure hole sealing is realized.

Description

The long distance band of a kind of mash gas pumping drilling press seal hole method
Technical field
The present invention relates to a kind of method for sealing of mash gas pumping drilling, relate in particular to the long distance band of a kind of mash gas pumping drilling press seal hole method.
Background technology
Goaf gas is gushed out and is made up of three parts, and promptly country rock gas is gushed out, goaf something lost coal gushes out and the next layer gas is gushed out.According to statistics, the goaf gas outburst amount accounts for 35%~45% of face gas outburst amount in nearly half the mine of China, and the minority mine is up to 80%~90%.As seen, goaf gas drainage is one of key of coal-face gas control.
The high position boring that is used for goaf gas drainage is exactly in the boring of air way to the roof construction, because the influence of rock fracture and rock motion around the boring, the sealing of hole effect of high-order boring is often poor, the general hole sealing depth of existing sealing of hole uses polyurethane sealing of hole or expansive cement sealing of hole in 10 meters; Because sealed borehole length has very large influence to the sealing of hole effect, the sealing of hole distance is long more, dark more, and effect is good more; Secondly, existing sealing of hole structure can not be clogged rock fracture, therefore can't eliminate the influence of rock fracture to the sealing of hole effect.
Summary of the invention
The present invention seeks to overcome the above-mentioned shortcoming that prior art exists, the long distance band of a kind of mash gas pumping drilling press seal hole method is provided.
For achieving the above object, the technology used in the present invention means are: the long distance band of a kind of mash gas pumping drilling press seal hole method, its sealing of hole structure comprises the gas drainage under suction pipe that is positioned at sealing of hole central axis position, be bundled in the aperture polyurethane mixed liquor carrier pipe on the gas drainage under suction pipe, polyurethane mixed liquor carrier pipe in the hole, expansive cement slurries carrier pipe, by aperture polyurethane mixed liquor carrier pipe, polyurethane mixed liquor carrier pipe is transported to the sealing of hole two ends with the polyurethane mixed liquor and forms aperture polyurethane sealing of hole section in the hole, polyurethane sealing of hole section in the hole, its interlude is an expansive cement sealing of hole section, by expansive cement slurries carrier pipe the expansive cement slurries are transported in the expansive cement sealing of hole section, finish the sealing of hole operation.
Further, the length of described expansive cement sealing of hole section is 10~50m.
Further, the slip casting pressure of the expansive cement slurries of described expansive cement sealing of hole section is 2~4MPa.
The invention has the beneficial effects as follows: it is inaccessiable more than 10 meters that this method extends to common sealing of hole mode with sealed borehole length, and be higher than prior art far away; By the polyurethane sealing of hole section that two fast reaction is foamed and solidified, realize the High Voltage injection hole sealing of zone line, realized long distance band press seal hole.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a structural representation of the present invention.
Among the figure: 1, gas drainage under suction pipe, 2, aperture polyurethane mixed liquor carrier pipe, 3, polyurethane mixed liquor carrier pipe in the hole, 4, expansive cement slurries carrier pipe, 5, aperture polyurethane sealing of hole section, 6, polyurethane sealing of hole section in the hole, 7, expansive cement sealing of hole section.
The specific embodiment
The long distance band of a kind of mash gas pumping drilling as shown in Figure 1 press seal hole method, its sealing of hole structure comprises the gas drainage under suction pipe 1 that is positioned at sealing of hole central axis position, be bundled in the aperture polyurethane mixed liquor carrier pipe 2 on the gas drainage under suction pipe 1, polyurethane mixed liquor carrier pipe 3 in the hole, expansive cement slurries carrier pipe 4, by aperture polyurethane mixed liquor carrier pipe 2, polyurethane mixed liquor carrier pipe 3 is transported to the sealing of hole two ends with the polyurethane mixed liquor and forms aperture polyurethane sealing of hole section 5 in the hole, polyurethane sealing of hole section 6 in the hole, the polyurethane feed liquid is in aperture polyurethane sealing of hole section 5, the foaming of polyurethane sealing of hole section 6 internal reactions forms two obstructions in the hole, the closed section that forms in the middle of it is an expansive cement sealing of hole section 7, the expansive cement slurries are transported in the expansive cement sealing of hole section 7 by expansive cement slurries carrier pipe 4 with grouting pump then, finish the sealing of hole operation.
Further, the length of described expansive cement sealing of hole section 7 is 10~50m.
Further, the slip casting pressure of the expansive cement slurries of described expansive cement sealing of hole section 7 is 2~4MPa.
Because the length of expansive cement sealing of hole section 7 can reach 10~50 meters, the sealing of hole section of long distance can promote the sealing effectiveness of firedamp taking-out discharging drilling greatly; The slip casting pressure of expansive cement slurries can reach 2~4MPa, and High Voltage can be expelled to the expansive cement slurries in the crack of rock, eliminates the influence of rock fracture to sealing effectiveness, thereby obtains higher gas drainage under suction negative pressure.
Embodiment 1
Polyurethane mixed liquor carrier pipe, expansive cement slurries carrier pipe and aperture polyurethane mixed liquor carrier pipe in the location arrangements hole of 20 meters, 6 meters and 2 meters in the distance aperture.Use special-purpose polyurethane sealing of hole pump that 2.5 kilograms of polyurethane mixed liquors are transported in the polyurethane wind control section at first at twice, the reaction foaming also forms the sealing of hole obstruction; Using grouting pump to be transported to by two sections polyurethane sealing of hole sections by expansive cement slurries carrier pipe in the expansive cement slurries that mix then forms in the closed area, observe the pressure meter of grouting pump, when pressure rises to 2MPa and when stablizing, stop slip casting and shut valve on the cement grout carrier pipe.Finish the sealing of hole operation.Behind the sealing of hole extraction negative pressure can to reach 21Kpa(vacuum pump negative pressure be 23Kpa).
Embodiment 2
Polyurethane mixed liquor carrier pipe, expansive cement slurries carrier pipe and aperture polyurethane mixed liquor carrier pipe in the location arrangements hole of 30 meters, 6 meters and 2 meters in the distance aperture.Use special-purpose polyurethane sealing of hole pump that 2.5 kilograms of polyurethane mixed liquors are transported in the polyurethane wind control section at first at twice, the reaction foaming also forms the sealing of hole obstruction; Using grouting pump to be transported to by two sections polyurethane sealing of hole sections by expansive cement slurries carrier pipe in the expansive cement slurries that mix then forms in the closed area, observe the pressure meter of grouting pump, when pressure rises to 2MPa and when stablizing, stop slip casting and shut valve on the cement grout carrier pipe.Finish the sealing of hole operation.Behind the sealing of hole extraction negative pressure can to reach 21.5Kpa(vacuum pump negative pressure be 23Kpa).
Embodiment 3
Polyurethane mixed liquor carrier pipe, expansive cement slurries carrier pipe and aperture polyurethane mixed liquor carrier pipe in the location arrangements hole of 45 meters, 6 meters and 2 meters in the distance aperture.Use special-purpose polyurethane sealing of hole pump that 2.5 kilograms of polyurethane mixed liquors are transported in the polyurethane wind control section at first at twice, the reaction foaming also forms the sealing of hole obstruction; Using grouting pump to be transported to by two sections polyurethane sealing of hole sections by expansive cement slurries carrier pipe in the expansive cement slurries that mix then forms in the closed area, observe the pressure meter of grouting pump, when pressure rises to 2MPa and when stablizing, stop slip casting and shut valve on the cement grout carrier pipe.Finish the sealing of hole operation.Behind the sealing of hole extraction negative pressure can to reach 22Kpa(vacuum pump negative pressure be 23Kpa).
Be not difficult to find out that by the foregoing description innovative point of the present invention is: the first, it is inaccessiable more than 10 meters that sealed borehole length is extended to common sealing of hole mode; The second, by the polyurethane obstruction that two fast reaction is foamed and solidified, realize the High Voltage injection hole sealing of zone line, slip casting pressure reaches 2-4MPa.
The above is the specific embodiment of the present invention only, is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses, and can expect easily changing or replacing, and all should be encompassed within protection scope of the present invention.

Claims (3)

1. the long distance of mash gas pumping drilling is with press seal hole method, it is characterized in that: its sealing of hole structure comprises the gas drainage under suction pipe (1) that is positioned at sealing of hole central axis position, be bundled in the aperture polyurethane mixed liquor carrier pipe (2) on the gas drainage under suction pipe (1), polyurethane mixed liquor carrier pipe (3) in the hole, expansive cement slurries carrier pipe (4), by aperture polyurethane mixed liquor carrier pipe (2), polyurethane mixed liquor carrier pipe (3) is transported to the sealing of hole two ends with the polyurethane mixed liquor and forms aperture polyurethane sealing of hole section (5) in the hole, polyurethane sealing of hole section (6) in the hole, its interlude is an expansive cement sealing of hole section (7), by expansive cement slurries carrier pipe (4) the expansive cement slurries are transported in the expansive cement sealing of hole section (7), finish the sealing of hole operation.
2. the long distance band of mash gas pumping drilling according to claim 1 press seal pore structure, it is characterized in that: the length of described expansive cement sealing of hole section (7) is 10~50m.
3. the long distance band of mash gas pumping drilling according to claim 1 press seal pore structure, it is characterized in that: the slip casting pressure of the expansive cement slurries of described expansive cement sealing of hole section (7) is 2~4Mpa.
CN 201310173298 2013-05-13 2013-05-13 Long-distance belt pressure hole sealing method of gas extracting drill hole Pending CN103225492A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201310173298 CN103225492A (en) 2013-05-13 2013-05-13 Long-distance belt pressure hole sealing method of gas extracting drill hole

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201310173298 CN103225492A (en) 2013-05-13 2013-05-13 Long-distance belt pressure hole sealing method of gas extracting drill hole

Publications (1)

Publication Number Publication Date
CN103225492A true CN103225492A (en) 2013-07-31

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Country Status (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105604522A (en) * 2016-03-24 2016-05-25 河南理工大学 Polyurethane long-distance rapid fixed-point hole sealing device and method for underground drilling of coal mine
CN106351606A (en) * 2016-11-18 2017-01-25 河南理工大学 Method for improving hole sealing effect based on drilled surrounding rock fracture structure
CN106545314A (en) * 2016-12-09 2017-03-29 煤炭科学技术研究院有限公司 A kind of combination type hole sealing device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105604522A (en) * 2016-03-24 2016-05-25 河南理工大学 Polyurethane long-distance rapid fixed-point hole sealing device and method for underground drilling of coal mine
CN106351606A (en) * 2016-11-18 2017-01-25 河南理工大学 Method for improving hole sealing effect based on drilled surrounding rock fracture structure
CN106545314A (en) * 2016-12-09 2017-03-29 煤炭科学技术研究院有限公司 A kind of combination type hole sealing device

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C06 Publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20130731

C02 Deemed withdrawal of patent application after publication (patent law 2001)