CN203769765U - Coal-seam-following borehole gas pressure measuring device - Google Patents
Coal-seam-following borehole gas pressure measuring device Download PDFInfo
- Publication number
- CN203769765U CN203769765U CN201420158720.6U CN201420158720U CN203769765U CN 203769765 U CN203769765 U CN 203769765U CN 201420158720 U CN201420158720 U CN 201420158720U CN 203769765 U CN203769765 U CN 203769765U
- Authority
- CN
- China
- Prior art keywords
- gas pressure
- pipe
- coal
- cloth bag
- grouting
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
Landscapes
- Measuring Fluid Pressure (AREA)
Abstract
The utility model relates to a coal-seam-following borehole gas pressure measuring device which comprises a screening pipe, a gas pressure pipe, a grouting pipe, an exhausting pipe, a tubular sack and a rubber retainer ring. The rubber retainer ring is arranged at one end of a borehole orifice, the gas pressure pipe, the grouting pipe and the exhausting pipe penetrate the rubber retainer ring to be inserted into a borehole, the screening pipe is arranged at the front end of the gas pressure pipe, a plurality of air suction holes are arranged on the screening pipe, the tubular sack is arranged at one end, close to the screening pipe, of the gas pressure pipe, diameter of the tubular sack is larger than that of a coal seam borehole, a piezometer I is arranged on the gas pressure pipe, a valve I is arranged on the exhausting pipe, a plurality of grout outgoing holes are arranged on the grouting pipe, and a piezometer II and a valve II are arranged on the grouting pipe. The coal-seam-following borehole gas pressure measuring device has the advantages of simple structure, economical cost, high pressure bearing capacity and good sealing effect.
Description
Technical field
The utility model relates to measuring technique of gas pressure in coal seam field, particularly a kind of along coal bed drilling gas pressure measurement device.
Background technology
China is the country of coal production maximum in the world, is again coal mine gas disaster country the most frequently in the world, is also coal and the most serious country of Gas Outburst disaster in the world simultaneously.Coal-bed gas pressure is the key foundation parameter of coal and Gas Outburst hazard prediction and control, and the Accurate Determining of coal-bed gas pressure has great importance for prevention coal and Gas Outburst disaster, guarantee Safety of Coal Mine Production and raising mine economic benefit.
The key of determination of coal seam gas pressure is at the sealing problem of determination of coal seam gas pressure boring, and the quality of sealing quality directly has influence on the accuracy of determination of coal seam gas pressure; Because relatively grow in coal body crack, there is the problem of sealing of hole difficulty, sealing of hole weak effect in suitable coal bed drilling particularly.At present, the sealing of determination of coal seam gas pressure boring comprises cushion rubber pressure mucus sealing of hole and two kinds of methods of cement mortar sealing of hole.Cushion rubber pressure mucus sealing of hole is relatively grown and is caused the sealing of cushion rubber and rib tight not due to coal body crack, and the phenomenon that leaks air, is not suitable for along coal bed drilling, and due to cushion rubber pressure mucus hole sealing device more complicated, on-the-spot use convenient not.Cement mortar sealing of hole skewness during due to slip casting, and easily produce shrinkage strain when cement setting also easily produces crack between sealing material and borehole wall, while causing coal-bed gas to measure, gas leak phenomenon occurs and causes pressure measurement failure.
Summary of the invention
The purpose of this utility model is to solve above shortcomings in prior art, and a kind of suitable coal bed drilling gas pressure measurement device that is applicable to determination of coal seam gas pressure is provided.
The utility model adopts following technical scheme: along coal bed drilling gas pressure measurement device, comprise screen casing (2), gas pressure pipe (4), Grouting Pipe (11), stack (6), cylindrical cloth bag (3) and rubber back-up ring (5), boring (1) one end, aperture is provided with rubber back-up ring (5), gas pressure pipe (4), Grouting Pipe (11) and stack (6) insert in boring (1) through rubber back-up ring (5), gas pressure pipe (4) front end is provided with screen casing (2), screen casing (2) is provided with many suction holes, gas pressure pipe (4) is being provided with cylindrical cloth bag (3) near screen casing (2) one end, diameter after the complete bulging of cylindrical cloth bag (3) is greater than the diameter of coal bed drilling (1), gas pressure pipe (4) is provided with pressure meter I(8), stack (6) is provided with valve I(7), Grouting Pipe (11) is provided with many slurry outlets, and Grouting Pipe (11) is provided with pressure meter II(10) and valve II(9).
The two ends of cylindrical cloth bag (3) by wire binding on gas pressure pipe (4); Cylindrical cloth bag (3) is provided with slide fastener.
Grouting Pipe (11) is deep into gas pressure pipe (4) 2/3～4/5 places; Stack (6) is through rubber back-up ring (5) 20～30cm;
The beneficial effects of the utility model are: be screen casing along coal bed drilling gas pressure measurement device front end, can avoid coal cinder in boring to enter and in gas pressure pipe, stop up gas pressure measurement pipeline; The shutoff of the anterior employing of boring polyurethane, middle part and rear portion adopt respectively injecting paste material and the shutoff of rubber back-up ring; Middle part grouting pressure can reach 4MPa, can prevent that injecting paste material from producing crack because of shrinkage strain; And in Grouting Pipe, be furnished with slurry outlet and pressure meter, be provided with steam vent in aperture, can make injecting paste material evenly be full of whole space, can make sealing material and borehole wall combine closely, realize the sealing along determination of coal seam gas pressure boring.The feature that there is simple in structure, cost economy, bears the high and good sealing effect of pressure.
Brief description of the drawings
Fig. 1 is the utility model structural representation.
Detailed description of the invention:
With reference to the accompanying drawings and in conjunction with example detailed description of the invention of the present utility model is described in further detail:
Referring to Fig. 1, along coal bed drilling gas pressure measurement device, formed by screen casing 2, cylindrical cloth bag 3, gas pressure pipe 4, rubber back-up ring 5, stack 6, valve I 7, pressure meter I 8, valve II 9, pressure meter II 10 and Grouting Pipe 11; 1 one end, aperture of holing is provided with rubber back-up ring 5, boring 1 diameter 75mm; The long 15m of gas pressure measurement device, gas pressure pipe 4, Grouting Pipe 11 and stack 6 insert in boring 1 through rubber back-up ring 5, and gas pressure pipe 4 length are 13m, diameter 45mm; Pressure meter I 8 is installed on gas pressure pipe 4; Gas pressure pipe 4 front ends are provided with screen casing 2, the long 2m of screen casing 2, diameter 60mm; On screen casing 2, be provided with the suction hole that several diameters are 8mm; Gas pressure pipe 4 is being provided with cylindrical cloth bag 3 near screen casing 2 one end, and the two ends of cylindrical cloth bag 3 on gas pressure pipe 4, are provided with slide fastener in cylindrical cloth bag 3 by wire binding.Cylindrical cloth bag 3 length are 3m, and the diameter after bulging is greater than the diameter of boring 1 completely; Grouting Pipe 11 length 8m, diameter 25mm, is furnished with the slurry outlet that several diameters are 8mm in Grouting Pipe 11, valve II 9 and pressure meter II 10 are installed; Stack 6 length 1m, diameter 15mm, through the about 20cm of rubber back-up ring 5, is provided with valve I 7 on stack 6; Rubber back-up ring 5 thickness 20cm, diameter 70mm.
In concrete enforcement, stop up gas pressure pipe 4 for fear of coal cinder, be provided with screen casing 2, and on screen casing 2, be furnished with the suction hole that several diameters are 8mm; In order to make evenly complete being distributed between boring 1 and gas pressure pipe 4 of slurries, Grouting Pipe 7 is provided with the slurry outlet that several diameters are 8mm, and valve II 9 and pressure meter II 10 are installed; In order to make slurries fully fill crack in boring 1, stack 6 is set, valve I 7 is installed on stack 6.
In gas pressure measurement process, first pull open the slide fastener in cylindrical cloth bag 3, pack polyurethane casting resin Quick uniform into cylindrical cloth bag 3, then strain the slide fastener in cylindrical cloth bag 3, rapidly gas pressure measurement device is sent in hole, the polyurethane casting resin in cylindrical cloth bag 3 can form inner shutoff block plate after expanding; Then in slip casting chamber, carry out slip casting by Grouting Pipe 11, find that stack 6 returns slurry and can cut out the valve I 7 on exhaust pipe mouth, carry out band pressure grouting, valve-off II 9 when grouting pressure table II 10 is 4MPa, to improve the leakproofness of boring; Finally carry out determination of coal seam gas pressure by the pressure meter I 8 on gas pressure pipe 4.
Although above the present invention is had been described in detail, the invention is not restricted to this, those skilled in the art of the present technique can carry out various amendments according to principle of the present invention.Therefore, all amendments of doing according to the principle of the invention, all should be understood to fall into protection scope of the present invention.
Claims (3)
1. along coal bed drilling gas pressure measurement device, comprise screen casing (2), gas pressure pipe (4), Grouting Pipe (11), stack (6), cylindrical cloth bag (3) and rubber back-up ring (5), it is characterized in that: boring (1) one end, aperture is provided with rubber back-up ring (5), gas pressure pipe (4), Grouting Pipe (11) and stack (6) insert in boring (1) through rubber back-up ring (5), gas pressure pipe (4) front end is provided with screen casing (2), screen casing (2) is provided with many suction holes, gas pressure pipe (4) is being provided with cylindrical cloth bag (3) near screen casing (2) one end, diameter after the complete bulging of cylindrical cloth bag (3) is greater than the diameter of coal bed drilling (1), gas pressure pipe (4) is provided with pressure meter I(8), stack (6) is provided with valve I(7), Grouting Pipe (11) is provided with many slurry outlets, and Grouting Pipe (11) is provided with pressure meter II(10) and valve II(9).
2. according to claim 1 along coal bed drilling gas pressure measurement device, it is characterized in that: the two ends of cylindrical cloth bag (3) by wire binding on gas pressure pipe (4); Cylindrical cloth bag (3) is provided with slide fastener.
3. according to claim 1 along coal bed drilling gas pressure measurement device, it is characterized in that: Grouting Pipe (11) is deep into gas pressure pipe (4) 2/3～4/5 places; Stack (6) is through rubber back-up ring (5) 20～30cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420158720.6U CN203769765U (en) | 2014-04-02 | 2014-04-02 | Coal-seam-following borehole gas pressure measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420158720.6U CN203769765U (en) | 2014-04-02 | 2014-04-02 | Coal-seam-following borehole gas pressure measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203769765U true CN203769765U (en) | 2014-08-13 |
Family
ID=51286965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420158720.6U Expired - Fee Related CN203769765U (en) | 2014-04-02 | 2014-04-02 | Coal-seam-following borehole gas pressure measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203769765U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113464122A (en) * | 2021-06-23 | 2021-10-01 | 中国矿业大学 | Method for improving gas pressure determination accuracy through auxiliary drilling |
| CN113503185A (en) * | 2021-06-23 | 2021-10-15 | 中国矿业大学 | Intelligent gas pressure measuring method |
-
2014
- 2014-04-02 CN CN201420158720.6U patent/CN203769765U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113464122A (en) * | 2021-06-23 | 2021-10-01 | 中国矿业大学 | Method for improving gas pressure determination accuracy through auxiliary drilling |
| CN113503185A (en) * | 2021-06-23 | 2021-10-15 | 中国矿业大学 | Intelligent gas pressure measuring method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203769707U (en) | Coal-seam-following borehole gas extracting and pressure measuring integrated hole sealing device | |
| CN104234740B (en) | A kind of low middle pressure air displacement high pressure coal seam gas train and method thereof | |
| CN203430473U (en) | Underground hydraulic fracturing drill hole sealing device of coal mine | |
| CN106837308B (en) | Gas tunnel pressure measuring device and method thereof | |
| CN107525541B (en) | Low-permeability coal-rock mass splitting permeation coupling grouting test device and method | |
| CN205638348U (en) | Secondary high pressure slip casting formula is in same direction as integrative hole sealing device of coal seam drilling gas drainage pressure measurement | |
| CN101463717A (en) | Converse fast hole-sealing method of continuous water exit hole-drilling conduit method | |
| CN203133053U (en) | Indoor simulation grouting testing device | |
| CN103015984A (en) | Method for measuring gas pressure of coal seam by casing high-pressure hole sealing method | |
| CN111322107A (en) | Secondary grouting plugging device in drilling | |
| CN214836257U (en) | Extraction drilling hole failure hole sealing processing apparatus | |
| CN103775120A (en) | Method for realizing drilling and hole sealing based on drill cuttings during uplink gas extraction | |
| CN203476320U (en) | Device for simultaneously determining pressure of coal bed gas through capsule grouting | |
| CN204113194U (en) | A kind of gas drilling hole sealing device integrating pressure measurement and extraction function | |
| CN203769765U (en) | Coal-seam-following borehole gas pressure measuring device | |
| CN203515458U (en) | Double-hole pipe slurry filling hole sealing device | |
| CN203430466U (en) | Drill hole sealing device for gas extraction of coal mine | |
| CN109162703B (en) | Super-long soft coal seam drilling multi-stage pressure sealing pressure measuring device and method | |
| CN105317397A (en) | Double cloth bags type grouting sealing set and method | |
| CN104389587A (en) | Quick measurement method of coal seam gas pressure | |
| CN204476353U (en) | A kind of mash gas pumping drilling plugging device | |
| CN204386553U (en) | One draws out methane and uses slip casting type hole packer | |
| CN105134285A (en) | Three-blocking and two-injecting gas extraction hole sealing method | |
| CN210049864U (en) | Packer grouting layered water stop simulation device | |
| CN109211754B (en) | Coal rock permeability measuring device and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 Termination date: 20150402 |
|
| EXPY | Termination of patent right or utility model |