CN101608544A - Descending hole coal bed gas pressure measurement water pressure excluding device and method - Google Patents
Descending hole coal bed gas pressure measurement water pressure excluding device and method Download PDFInfo
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- CN101608544A CN101608544A CNA2009100318511A CN200910031851A CN101608544A CN 101608544 A CN101608544 A CN 101608544A CN A2009100318511 A CNA2009100318511 A CN A2009100318511A CN 200910031851 A CN200910031851 A CN 200910031851A CN 101608544 A CN101608544 A CN 101608544A
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Abstract
A kind of descending hole coal bed gas pressure measurement water pressure excluding device and method is applicable to occur hydraulic pressure in the descending hole coal bed gas pressure measurement process.It comprises the piezometer tube that inserts boring, pressure meter, sealing of hole grouting pump and Grouting Pipe, tie up pipe with it in the setting of piezometer tube side into one, the adjutage water side is provided with Draw off valve, the adjutage water inlet end is put to the seat earth petrosal foramen, more than the water inlet end position 2m of the high water pipe in position of piezometer tube inlet end.When hydraulic pressure occurring in the boring in the determination of coal seam gas pressure process, water is long-pending foot of hole under the deadweight effect; Methane gas in the coal seam continues to flow in the shot borehole, and methane gas produces pressure on the top of water, and water advances adjutage in the pressure effect; Regularly discharge water, the water of the inner accumulated of in time will holing is discharged, and can effectively avoid hydraulic pressure to the gas pressure reading, thereby measure coal-bed gas pressure accurately and reliably.It is simple in structure, and is easy to operate, effective, and cost is lower, degree of accuracy height.
Description
Technical field
The present invention relates to descending hole coal bed gas pressure measurement water pressure excluding device and method, be particularly useful in descending hole gas pressure measurement process, occurring hydraulic pressure the time, can in time the water of boring inner accumulated be discharged.
Background technology
Gas pressure is the power that gas flows in the coal seam, is the major parameter that calculates coal seam gas-bearing capacity what and mash gas dynamic phenomenon potential size.In the outstanding generation of coal and gas, evolution, gas pressure plays significant role.Therefore, accurately measuring coal-bed gas pressure gushes out for research coal-bed gas reserves, Gas Flow, gas, forecasting coal and gas outburst danger are given birth to and are rationally formulated Firedamp precaution measures etc. and all have very important significance, and are the important leverages of Safety of Coal Mine Production.Explore through years of researches, aspect determination of coal seam gas pressure, drawn different pressure testing methods such as yellow mud-cement manometric method, cushion rubber (capsule) hole packer manometric method, cushion rubber (capsule)-pressure mucus manometric method, novel slurry filling manometric method both at home and abroad.But these methods only are applicable to water-free coal rock layer, also never solve for the mensuration problem of the gas pressure of the coal rock layer of moisture, infiltration.
Summary of the invention
The objective of the invention is to overcome the weak point in the prior art, provide a kind of simple in structure, easy to operate, pressure measurement is descending hole coal bed gas pressure measurement water pressure excluding device and method accurately.
For achieving the above object, descending hole coal bed gas pressure measurement water pressure excluding device of the present invention, comprise the piezometer tube that inserts boring, the pressure meter that links to each other with piezometer tube, sealing of hole grouting pump and Grouting Pipe are tied up adjutage into one in the setting of described piezometer tube side with it, the adjutage water side is provided with Draw off valve, the adjutage water inlet end is put to the seat earth petrosal foramen, and the position of piezometer tube inlet end is higher than more than the water inlet end position 2m of adjutage.
Described adjutage is nylon tube or the copper tube of φ 8 * 1mm; Be made into presbyopia in the about 20cm length of described adjutage water inlet end.
Descending hole coal bed gas pressure measurement water pressure excluding method of the present invention: before sealing of hole, the adjutage water inlet end is packed tightly with towel, stop up adjutage to avoid coal dust; Then adjutage is tied up on piezometer tube, guaranteed that the position of piezometer tube inlet end is higher than more than the water inlet end position 2m of adjutage; Be entangled on adjutage and the piezometer tube with burlap or towel, the adjutage of tying up to one is mounted to the boring set depth with the piezometer tube device, the adjutage water inlet end is put to the seat earth petrosal foramen; Injection hole sealing then, behind about 24h, setting pressure table and valve are observed and record gas pressure situation of change; When hydraulic pressure occurring in the boring in the determination of coal seam gas pressure process, water accumulates in foot of hole under the deadweight effect; Methane gas in the coal seam continues to flow in the shot borehole, and water enters adjutage under the effect of methane gas pressure; Open this moment and decide valve and discharge water, when there is the bubble valve-off immediately of overflowing the water side of adjutage, discharging water finishes.
Beneficial effect: because a cover jettison gear has been installed in pressure measurement sealing of hole process, can in time the water of boring inner accumulated be discharged, effectively avoided the influence of hydraulic pressure, thereby can measure coal-bed gas pressure accurately and reliably, be specially adapted to the firedamp testing in the moisture coal rock layer the gas pressure reading.It is simple in structure, and result of use is good, and cost is lower, and is simple to operate, and degree of accuracy height has practicality widely in this area.
Description of drawings
Accompanying drawing is a descending hole coal bed gas pressure measurement water pressure excluding apparatus structure schematic diagram of the present invention
Among the figure: the 1-adjutage; The 2-valve; The 3-pressure meter; The 4-grouting pump; The 5-Grouting Pipe; The 6-piezometer tube.
The specific embodiment
Below in conjunction with accompanying drawing an embodiment among the present invention is further described:
Descending hole coal bed gas pressure measurement water pressure excluding device of the present invention, mainly constitute by adjutage 1, piezometer tube 6 and pressure meter 3, pressure meter 3 is connected the outlet of piezometer tube 6, adjutage 1 is tied up with piezometer tube 6 and is one, be mounted to the boring precalculated position in the lump, Draw off valve 2 is equipped with in adjutage 1 water side, and adjutage 1 water inlet end is put to the seat earth petrosal foramen, and the position of piezometer tube 3 inlet ends is higher than more than the water inlet end position 2m of adjutage 1.Adjutage 1 adopts nylon tube or the copper tube of φ 8 * 1mm; Be made into presbyopia in the about 20cm length of adjutage 1 water inlet end, the place, aperture is equipped with sealing of hole grouting pump 4 and Grouting Pipe 5.
Descending hole coal bed gas pressure measurement water pressure excluding method of the present invention: before sealing of hole, making presbyopia in the adjutage 1 water inlet end 20cm length, promptly be drilled with if open aperture, to enlarge the passage that water enters adjutage 1, with towel presbyopia is partly packed tightly, avoid coal dust to stop up adjutage 1; Adjutage 1 is tied up on piezometer tube 6, required the position of piezometer tube 6 inlet ends to be higher than more than the water inlet end position 2m of adjutage 1; A certain amount of burlap or towel are entangled on adjutage 1 and the piezometer tube 6, mix on polyurethane liquid.The adjutage of tying up to one 1 is mounted to the boring set depth with piezometer tube 6 devices, requires adjutage 1 water inlet end to put to the seat earth petrosal foramen.Because methane gas on water, can avoid methane gas to discharge through adjutage 1 all the time like this.After the polyurethane liquid for the treatment of front end fully expands, Grouting Pipe is installed also connects grouting pump.Determine the use amount of expansion non shrinking cement to prepare the expansive cement slurries by a certain percentage according to hole sealing depth, with the grouting pump one-time continuous with in the slurries injection hole; Behind the slip casting 24h, load onto pressure meter 3, valve 2, and specify special watt inspection person to be responsible for the work of gas pressure mensuration, regularly observe and accurate recording gas pressure situation of change; When hydraulic pressure occurred in the boring in the determination of coal seam gas pressure process, water accumulates in foot of hole under the deadweight effect; Methane gas in the coal seam continues to flow in the shot borehole, and methane gas produces very big pressure on the top of water, and water flows to adjutage 1 under pressure; During The field, arrange special watt inspection person regularly to discharge water, there is the bubble valve-off 2 immediately of overflowing the water side of finding adjutage 1, and discharging water finishes.
Claims (4)
1, a kind of descending hole coal bed gas pressure measurement water pressure excluding device, comprise the piezometer tube (6) that inserts boring, the pressure meter (3) that links to each other with piezometer tube (6), it is characterized in that: be provided with the adjutage of tying up with it to one (1) in the seat earth petrosal foramen of stretching in described piezometer tube (6) side, adjutage (1) water side is provided with Draw off valve (2), and the position of piezometer tube (6) inlet end is higher than more than the water inlet end position 2m of adjutage (1).
2, descending hole coal bed gas pressure measurement water pressure excluding device according to claim 1, it is characterized in that: described adjutage (1) is nylon tube or the copper tube of φ 8 * 1mm.
3, descending hole coal bed gas pressure measurement water pressure excluding device according to claim 1 is characterized in that: be made into presbyopia in described adjutage (1) the water inlet end 20cm length.
4, a kind of descending hole coal bed gas pressure measurement water pressure excluding method of device according to claim 1 is characterized in that: before sealing of hole, adjutage (1) water inlet end is packed tightly with towel, stop up adjutage (1) to avoid coal dust; Then adjutage (1) is tied up on piezometer tube (6), guaranteed that the position of piezometer tube (6) inlet end is higher than more than the water inlet end position 2m of adjutage (1); Be entangled on adjutage (1) and the piezometer tube (6) with burlap or towel, the adjutage of tying up to one (1) is mounted to the boring set depth with piezometer tube (6) device, adjutage (1) water inlet end is put to the seat earth petrosal foramen; Injection hole sealing then, behind about 24h, setting pressure table (3) and valve (2) are observed and record gas pressure situation of change; When hydraulic pressure occurring in the boring in the determination of coal seam gas pressure process, water accumulates in foot of hole under the deadweight effect; Methane gas in the coal seam continues to flow in the shot borehole, and water enters adjutage (1) under the effect of methane gas pressure, opens this moment decide valve (2) and to discharge water, and valve-off (2) immediately when the water side of adjutage (1) has bubble to escape, and discharging water finishes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100318511A CN101608544A (en) | 2009-06-26 | 2009-06-26 | Descending hole coal bed gas pressure measurement water pressure excluding device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2009100318511A CN101608544A (en) | 2009-06-26 | 2009-06-26 | Descending hole coal bed gas pressure measurement water pressure excluding device and method |
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| CN101608544A true CN101608544A (en) | 2009-12-23 |
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| CNA2009100318511A Pending CN101608544A (en) | 2009-06-26 | 2009-06-26 | Descending hole coal bed gas pressure measurement water pressure excluding device and method |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121376A (en) * | 2010-01-11 | 2011-07-13 | 河南理工大学 | Intelligent coal seam gas pressure tester |
| CN102606143A (en) * | 2011-01-24 | 2012-07-25 | 河南理工大学 | Downward hole pressure measuring device and process |
| CN102953727A (en) * | 2011-08-26 | 2013-03-06 | 淮南矿业(集团)有限责任公司 | System and method for measuring subsurface gas pressure of coal mine |
| CN103742129A (en) * | 2013-12-30 | 2014-04-23 | 中国矿业大学 | Method for drilling holes on soft coal seam to measure coal seam gas pressure |
| CN103742115A (en) * | 2013-12-18 | 2014-04-23 | 中国矿业大学 | Underground coal mine fracture sealing device and method |
| CN104500042A (en) * | 2014-10-16 | 2015-04-08 | 山东科技大学 | Measuring method for water-containing coal and rock down drill hole gas pressure observation system |
| CN104963717A (en) * | 2015-07-01 | 2015-10-07 | 淮南矿业(集团)有限责任公司 | Positive pressure automatic water discharging device and gas pressure detection device |
| CN107939382A (en) * | 2018-01-03 | 2018-04-20 | 平安煤炭开采工程技术研究院有限责任公司 | Gas pressure test device |
| CN108798760A (en) * | 2018-06-12 | 2018-11-13 | 中国矿业大学 | A kind of method that single hole measures multiple seam gas pressure |
| CN109184672A (en) * | 2018-11-14 | 2019-01-11 | 中煤科工集团重庆研究院有限公司 | Coal seam angle of depression drilling gas pressure measuring unit and pressure measurement method |
| CN109931051A (en) * | 2019-04-28 | 2019-06-25 | 淮北矿业股份有限公司 | Determination of coal seam gas pressure device |
| CN111487164A (en) * | 2020-04-21 | 2020-08-04 | 重庆大学 | Novel variable-load pressurized grouting test method for fractured coal and rock mass |
-
2009
- 2009-06-26 CN CNA2009100318511A patent/CN101608544A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121376B (en) * | 2010-01-11 | 2013-11-27 | 河南理工大学 | Intelligent coal seam gas pressure tester |
| CN102121376A (en) * | 2010-01-11 | 2011-07-13 | 河南理工大学 | Intelligent coal seam gas pressure tester |
| CN102606143A (en) * | 2011-01-24 | 2012-07-25 | 河南理工大学 | Downward hole pressure measuring device and process |
| CN102953727A (en) * | 2011-08-26 | 2013-03-06 | 淮南矿业(集团)有限责任公司 | System and method for measuring subsurface gas pressure of coal mine |
| CN103742115B (en) * | 2013-12-18 | 2016-03-23 | 中国矿业大学 | A kind of coal mine underground fracturing sealing device and method |
| CN103742115A (en) * | 2013-12-18 | 2014-04-23 | 中国矿业大学 | Underground coal mine fracture sealing device and method |
| CN103742129A (en) * | 2013-12-30 | 2014-04-23 | 中国矿业大学 | Method for drilling holes on soft coal seam to measure coal seam gas pressure |
| CN103742129B (en) * | 2013-12-30 | 2016-06-22 | 中国矿业大学 | The method of weak seam measuring gas pressure of coal bed by drilling hole |
| CN104500042A (en) * | 2014-10-16 | 2015-04-08 | 山东科技大学 | Measuring method for water-containing coal and rock down drill hole gas pressure observation system |
| CN104500042B (en) * | 2014-10-16 | 2017-05-03 | 山东科技大学 | Measuring method for water-containing coal and rock down drill hole gas pressure observation system |
| CN104963717A (en) * | 2015-07-01 | 2015-10-07 | 淮南矿业(集团)有限责任公司 | Positive pressure automatic water discharging device and gas pressure detection device |
| CN104963717B (en) * | 2015-07-01 | 2017-07-25 | 淮南矿业(集团)有限责任公司 | Malleation automatic water drainage device and gas pressure detection means |
| CN107939382A (en) * | 2018-01-03 | 2018-04-20 | 平安煤炭开采工程技术研究院有限责任公司 | Gas pressure test device |
| CN108798760A (en) * | 2018-06-12 | 2018-11-13 | 中国矿业大学 | A kind of method that single hole measures multiple seam gas pressure |
| CN108798760B (en) * | 2018-06-12 | 2019-08-02 | 中国矿业大学 | A kind of method of single hole measurement multiple seam gas pressure |
| CN109184672A (en) * | 2018-11-14 | 2019-01-11 | 中煤科工集团重庆研究院有限公司 | Coal seam angle of depression drilling gas pressure measuring unit and pressure measurement method |
| CN109931051A (en) * | 2019-04-28 | 2019-06-25 | 淮北矿业股份有限公司 | Determination of coal seam gas pressure device |
| CN111487164A (en) * | 2020-04-21 | 2020-08-04 | 重庆大学 | Novel variable-load pressurized grouting test method for fractured coal and rock mass |
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Application publication date: 20091223 |