CN207194943U - A kind of Drillhole gas pumping laboratory analog system - Google Patents
A kind of Drillhole gas pumping laboratory analog system Download PDFInfo
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- CN207194943U CN207194943U CN201721286670.XU CN201721286670U CN207194943U CN 207194943 U CN207194943 U CN 207194943U CN 201721286670 U CN201721286670 U CN 201721286670U CN 207194943 U CN207194943 U CN 207194943U
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Abstract
The utility model discloses a kind of multipurpose Drillhole gas pumping laboratory analog system, including borehole simulation pipe, hole-sealing grouting system, gas pressure simulated loading system, gas detector, acoustic emission system and computer；Two is provided with plug model configuration in borehole simulation pipe, and the tube wall of borehole simulation pipe is provided with multiple cracks simulation hole, simulation pipe in crack is connected with the simulation hole of crack, gas leakage detection switch is connected with crack simulation pipe；Hole-sealing grouting system includes Grouting Pipe, slurry recovering tube, grouting pump, slip casting handle and grouting pressure table；Gas pressure simulated loading system includes vavuum pump, methane gas tank, pressure vacuum gauge, vacuum switch, methane gas tank switch, gas pressure table and gas pumping switch.It is convenient that the utility model is realized, can real simulation field condition, and the experiment for needing to do at the scene is moved in laboratory, tests that the manpower and materials of consuming are few, and experiment effect is good, the accuracy of experimental result is high, practical.
Description
Technical field
The utility model belongs to drilling gas extraction technical field, and in particular to a kind of multipurpose Drillhole gas is taken out
Adopt laboratory analog system.
Background technology
Gas bearing capacity in China most area coal seam is high, pressure is big, gas permeability of coal seam is low, and geological tectonic conditions are multiple
It is miscellaneous.And Gas Disaster is one of main disaster of China's coal-mine, the safety in production to mine has serious threat, and it is close to drill
Envelope effect directly affects the extracting result of gas and effective extraction radius of drilling, and data shows：Into the sky of extraction system
Gas 80% is above is by the suction that drills, if drilling air imbibed quantity reduces 1/2~1/3, drilling gas flow can increase
1.5~2 times.Therefore, the quality of sealing of hole effect directly affects the extracting result of gas.During mash gas pumping drilling sealing of hole,
Due to just there is a large amount of cracks after itself pore-forming in drilling hole, while the hole of borehole circumference (splits) gap and further develops, expands,
Outside air easily (is split) in gap access from this some holes in the presence of extraction negative pressure, so as to cause under gas extraction concentration
Drop, directly result in the present situation that colliery sealing of hole difficulty is big, sealing of hole effect is poor.China's drainage from coal seam extraction gas concentration compared with
Low, extraction negative pressure is also universal relatively low, and the gas density of the higher extraction of negative pressure is lower.It is possible thereby to infer：Existing sealing of hole skill
Art is far from reaching sealing isolation effect.For high methane weak seam, this coal bed gas extraction drilling leakage problem is particularly
It is prominent.In addition, the quality of sealing of hole effect affects the accuracy of determination of coal seam gas pressure again, if sealing of hole sections exist it is minimal amount of
Gas leakage, it is all that the pressure value for making to obtain is relatively low, cause the judge to gas bearing and the larger error of prominent situation, or even make not
When control prece and measure.According to preventing and treating coal and gas prominent regulation, the maximum coal-bed gas pressure of live practical measurement is
One of four single indexs of Coal Seam Outburst Hazard identification, the size of coal-bed gas pressure reflects Coal Seam Outburst Hazard
The order of severity, it is efficient sealed by being carried out to gas pressure measurement drilling, can be with the coal-bed gas pressure of Accurate Determining, this is just
Mine targetedly formulates outburst prevention measures, establishment gas-geologic map etc. and provides important evidence.At present, it is such experiment be mostly
Scene is carried out, and laboratory can carry out the relatively fewer of such experiment, and underground is limited by some conditions, various factors,
Test effect is barely satisfactory, and the manpower and materials for operating consuming are also high.Therefore, it is badly in need of a kind of experimental system, to simulate drilling gas
Extraction, the sealing property of influence and sealing material of the research the wall of a borehole crack gas leakage to drilling gas extraction.
Utility model content
Technical problem to be solved in the utility model is to be directed to above-mentioned deficiency of the prior art, there is provided one kind is multi-purpose
Way Drillhole gas pumping laboratory analog system, it is novel in design rationally, and it is convenient to realize, being capable of real simulation scene feelings
Condition, and the experiment for needing to do at the scene is moved in laboratory, tests that the manpower and materials of consuming are few, and experiment effect is good, experiment knot
The accuracy of fruit is high, practical, is easy to promote the use of.
In order to solve the above technical problems, the technical solution adopted in the utility model is：A kind of multipurpose Drillhole watt
This extraction laboratory analog system, it is characterised in that：Including borehole simulation pipe, hole-sealing grouting system, gas pressure simulation loading
System and gas detector, and acoustic emission system and the computer that connects with acoustic emission system；Two in the borehole simulation pipe
Head is provided with plug model configuration, is provided with the tube wall of one between two plug model configurations section borehole simulation pipe more
Hole is simulated in individual crack, and simulation pipe in crack is connected with the crack simulation hole, gas leakage detection is connected with the crack simulation pipe
Switch；
The hole-sealing grouting system includes the Grouting Pipe and slurry recovering tube stretched into borehole simulation pipe, and is connected with Grouting Pipe
Grouting pump；Slip casting handle and grouting pressure table are provided with the grouting pump；
The gas pressure simulated loading system includes being connected to the true of gas pumping pipe one end by vavuum pump connecting tube
Empty pump and the methane gas tank that the gas pumping pipe other end is connected to by methane gas tank connecting tube, the vavuum pump connecting tube
On be connected with pressure vacuum gauge and vacuum switch, is provided with methane gas tank in the methane gas outlet of the methane gas tank
Switch, gas pressure table and gas pumping switch are connected with the methane gas tank connecting tube；The Grouting Pipe is fixed on watt
The downside of this drainage tube, the slurry recovering tube are fixed on the upside of gas pumping pipe, and the gas detector passes through gas detector
Connecting tube is connected in vavuum pump connecting tube.
A kind of above-mentioned Drillhole gas pumping laboratory analog system, it is characterised in that：The borehole simulation pipe
It is made up of a diameter of 135mm lucite tube, the gas pumping pipe is made up of a diameter of 75mm lucite tube, described
Grouting Pipe and slurry recovering tube are made by PVC aluminium-plastic pipes.
A kind of above-mentioned Drillhole gas pumping laboratory analog system, it is characterised in that：The plug simulation knot
Structure is by the cotton gauze being wrapped on gas pumping pipe, Grouting Pipe and slurry recovering tube and the poly- ammonia of liquid being uniformly applied on cotton gauze
Ester foaming is formed, and the both sides of the plug model configuration are provided with the pad for preventing plug model configuration from spreading to the left and right
Piece.
A kind of above-mentioned Drillhole gas pumping laboratory analog system, it is characterised in that：The gas detector
For light interference type gas detector.
A kind of above-mentioned Drillhole gas pumping laboratory analog system, it is characterised in that：The acoustic emission system
For SAEU2S acoustic emission systems, the SAEU2S acoustic emission systems include data acquisition cabinet and pass through cable and data gather computer
The multichannel preamplifier of case connection, the input of the preamplifier are connected with sensor, the data by signal wire
Collection cabinet is connected by USB connecting lines with computer.
A kind of above-mentioned Drillhole gas pumping laboratory analog system, it is characterised in that：Simulate hole in the crack
Quantity be 6, wherein the aperture in 2 cracks simulation hole be 2mm, wherein the aperture that hole is simulated in 2 cracks is 3mm, 2 in addition
The aperture in crack simulation hole is 4mm；The external diameter of the crack simulation pipe is engaged with the aperture in crack simulation hole.
The utility model has advantages below compared with prior art：
1st, of the present utility model simple in construction, novel in design reasonable, it is convenient to realize.
2nd, simple installation of the present utility model, it is simple to operate, underground trials are changed to laboratory, directly utilize simulation system
To substitute the drilling gas extraction of underground, it is equivalent to, by the live scaled to laboratory of underground, reduce underground examination
The time is tested, reduces operation difficulty, has saved the manpower and materials expended needed for experiment, and substantially increases test efficiency and accurate
Degree, it is thus also avoided that experiment is directly carried out in underground to be needed to stop the loss that production is brought.
3rd, the utility model simulates hole by opening up multiple cracks on the tube wall of borehole simulation pipe, and simulates hole in crack
Upper connection crack simulation pipe, connects gas leakage detection switch on crack simulation pipe, can simulate the wall of a borehole diverse location gas leakage pair
The influence of gas pumping, eliminate the simulation that can only carry out the wall of a borehole and material gas leakage in laboratory simulation in the past, pole
The condition at scene is approached to big degree.
4th, detection means of the present utility model is rich and varied, including acoustic emission system and gas detector etc., is sent out by sound
Penetrate system acquisition acoustic emission signal data and the signal collected is transferred to computer and recorded, can be for use by sound emission
Stress variation inside during signal data research cement grout solidification, and then the closure situation of borehole simulation pipe is studied, judge to bore
Casement intends whether having crack use inside pipe；Diverse location can be detected by gas detector, the crack of different pore size is simulated
Mash gas extraction concentration during the gas leakage of hole, for analyzing influence of the crack of diverse location, different pore size to drilling gas extraction.
5th, the utility model has multiple functions, can be used in detecting the sealing property of sealing material, research the wall of a borehole is not
With influence of the position gas leakage to gas pumping, drilling gas extraction laboratory simulation etc. is carried out；It is not only able to simulate drilling gas
Extraction, additionally it is possible to when being directed to coal bed gas extraction, the crack of borehole sealing section is sprouted and extended feelings using acoustic emission system
Condition is monitored in real time, and the unstability of borehole sealing section is had great significance.
6th, the utility model reduces influence of many uncertain factors to result of the test in underground trials, can test
Room carries out Quantitative study to the factor for influenceing experiment, substantially increases the accuracy of experimental result.
7th, the utility model can provide metastable a gas pressure and concentration for bore inner, reduce experiment
Error, simulate to greatest extent scene situation.
In summary, the utility model is novel in design rationally, and it is convenient to realize, can real simulation field condition, and need to
The experiment to do at the scene is moved in laboratory, tests that the manpower and materials of consuming are few, and experiment effect is good, the accuracy of experimental result
Height, it is practical, it is easy to promote the use of.
Below by drawings and examples, the technical solution of the utility model is described in further detail.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is use state figure when the utility model is used to carry out drilling gas extraction laboratory simulation.
Fig. 3 is use state figure when the utility model is used to carry out the test of sealing material sealing property.
Description of reference numerals:
Simulate hole in 1-crack；2-vavuum pump；3-pressure vacuum gauge；
4-vacuum switch；5-gas pumping pipe；6-slurry recovering tube；
7-borehole simulation pipe；8-plug model configuration；9-gas leakage detection switch；
10-cement grout；11-gas pumping switchs；12-methane gas tank connecting tube；
13-gas pressure table；14-methane gas tank switchs；15-methane gas tank；
16-1-data acquisition cabinet；16-2-preamplifier；16-3-sensor；
17-crack simulation pipe；18-pad；19-vavuum pump connecting tube；
20-Grouting Pipe；21-grouting pressure table；22-slip casting handle；
23-grouting pump；24-gas detector；25-gas detector connecting tube；
26-sealing material.
Embodiment
As shown in figure 1, Drillhole gas pumping laboratory analog system of the present utility model, including borehole simulation pipe
7th, hole-sealing grouting system, gas pressure simulated loading system and gas detector 24, and acoustic emission system and with sound emission system
The computer 17 that system connects；Two is provided with plug model configuration 8 in the borehole simulation pipe 7, positioned at two plug simulation knots
Multiple crack simulation holes 1 are provided with the tube wall of one section of borehole simulation pipe 7 between structure 8, are connected with the crack simulation hole 1
Pipe 17 is simulated in crack, and gas leakage detection switch 9 is connected with the crack simulation pipe 17；
The hole-sealing grouting system includes Grouting Pipe 20 and the slurry recovering tube 6 stretched into borehole simulation pipe 7, and and Grouting Pipe
The grouting pump 23 of 20 connections；Slip casting handle 22 and grouting pressure table 21 are provided with the grouting pump 23；
The gas pressure simulated loading system includes being connected to the one end of gas pumping pipe 5 by vavuum pump connecting tube 19
Vavuum pump 2 and the methane gas tank 15 that the other end of gas pumping pipe 5 is connected to by methane gas tank connecting tube 12, the vacuum
Pressure vacuum gauge 3 and vacuum switch 4 are connected with pump connecting tube 19, is set in the methane gas outlet of the methane gas tank 15
Methane gas tank switch 14 is equipped with, gas pressure table 13 and gas pumping switch are connected with the methane gas tank connecting tube 12
11；The Grouting Pipe 20 is fixed on the downside of gas pumping pipe 5, and the slurry recovering tube 6 is fixed on the upside of gas pumping pipe 5, institute
Gas detector 24 is stated to be connected in vavuum pump connecting tube 19 by gas detector connecting tube 25.When it is implemented, described watt
This gas tank connecting tube 12 is flexible pipe.The gas detector 24 is connected to positioned at vacuum pressure by gas detector connecting tube 25
In one section of vavuum pump connecting tube 19 between power table 3 and vacuum switch 4.
In the present embodiment, the borehole simulation pipe 7 is made up of a diameter of 135mm lucite tube, the gas pumping
Pipe 5 is made up of a diameter of 75mm lucite tube, and the Grouting Pipe 20 and slurry recovering tube 6 are made by PVC aluminium-plastic pipes.
In the present embodiment, the plug model configuration 8 is by being wrapped on gas pumping pipe 5, Grouting Pipe 20 and slurry recovering tube 6
Cotton gauze and the liquid polyurethane foaming being uniformly applied on cotton gauze are formed, and the both sides of the plug model configuration 8 are all provided with
It is equipped with the pad 18 for preventing plug model configuration 8 from spreading to the left and right.
In the present embodiment, the gas detector 24 is light interference type gas detector.
In the present embodiment, the acoustic emission system is SAEU2S acoustic emission systems, and the SAEU2S acoustic emission systems include
The data acquisition cabinet 16-1 and multichannel preamplifier 16-2 being connected with data acquisition cabinet 16-1 by cable, it is described preposition
Amplifier 16-2 input is connected with sensor 16-3 by signal wire, and the data acquisition cabinet 16-1 is connected by USB
Line is connected with computer 17.
In the present embodiment, the quantity in the crack simulation hole 1 is 6, wherein the aperture in 2 cracks simulation hole 1 is 2mm,
The aperture in wherein 2 cracks simulation hole 1 is 3mm, and the aperture in 2 cracks simulation hole 1 is 4mm in addition；Simulate pipe 17 in the crack
The aperture in external diameter and crack simulation hole 1 be engaged.
As shown in Fig. 2 the laboratory simulation method of drilling gas extraction is carried out using the utility model, including following step
Suddenly：
Step 1: experiment early-stage preparations, detailed process are：
Step 101, one section of a diameter of 135mm lucite tube is taken to take one section of a diameter of 75mm as borehole simulation pipe 7
Lucite tube as gas pumping pipe 5, take one section of PVC aluminium-plastic pipe as Grouting Pipe 20, take one section of PVC aluminium-plastic pipe as returning
Starch pipe 6；When it is implemented, the diameter as the Grouting Pipe 20 and the PVC aluminium-plastic pipes of slurry recovering tube 6 is 20mm；
Step 102, multiple crack simulation holes 1 are outputed on the tube wall of borehole simulation pipe 7, and connected in simulating hole 1 in crack
Crack simulation pipe 17 is connect, gas leakage detection switch 9 is connected on crack simulation pipe 17；
Step 103, gas pumping pipe 5, Grouting Pipe 20 and slurry recovering tube 6 stopped up with iron wire, and make Grouting Pipe 20 solid
The downside of gas pumping pipe 5 is scheduled on, slurry recovering tube 6 is fixed on the upside of gas pumping pipe 5；
Step 104, cotton gauze is cut into strip, is wrapped in two standards on gas pumping pipe 5, Grouting Pipe 20 and slurry recovering tube 6
The standby opening position that plug model configuration 8 is set, and be respectively provided with the both sides of cotton gauze for preventing plug model configuration 8 to the left and right
The pad 18 of diffusion；When it is implemented, by cotton gauze be cut into width be 6cm~8cm strip, due to plug model configuration 8 by
Polyurethane foam is formed, therefore by setting pad 18 in the both sides of cotton gauze, can prevent that polyurethane foam is uneven, causes
Sealing effectiveness is poor or even sealing of hole fails；
Step 2: prefabricated plug model configuration 8 and forming slip casting space, detailed process is：
Step 201, after liquid polyurethane is poured into beaker, liquid polyurethane is dipped using brush and is uniformly applied to cotton yarn
On cloth, and liquid polyurethane is set to penetrate into completely in cotton gauze；When it is implemented, because polyurethane is chemical material, and it is poisonous,
When therefore carrying out step operation, it should put on one's gloves, prevent from splashing on hand；
Step 202, the gas pumping pipe 5 after liquid polyurethane will be smeared, the entirety of Grouting Pipe 20 and slurry recovering tube 6 puts brill into
Casement is intended in pipe 7, and fixed good position, gas pumping pipe 5 is located at the middle position of the radial direction of gas pumping pipe 5；By gas
Drainage tube 5 is located at the middle position of the radial direction of gas pumping pipe 5, is advantageous to liquid polyurethane and foams to form plug model configuration 8,
Drilling can preferably be blocked.When it is implemented, because the time of liquid polyurethane foaming is shorter, therefore step 202 is whole
Operating process should try one's best briefly, prevent liquid polyurethane foams before putting into borehole simulation pipe 7 from finishing；
The overall placement of step 203, the borehole simulation pipe 7 that will be fed into after gas pumping pipe 5, Grouting Pipe 20 and slurry recovering tube 6
Fixed on test-bed, and by borehole simulation pipe 7, avoid borehole simulation pipe 7 from sliding, stand two days afterwards, wait liquid
Polyurethane foam forms plug model configuration 8 completely；
Step 3: toward slip casting in borehole simulation pipe 7, sealing of hole is simulated, and gather for studying crack by acoustic emission system
The acoustic emission signal data of closure situation, detailed process are：
Step 301, cleaning grouting pump 23, and check grouting pump 23, it is ensured that grouting pump 23 is intact；
Step 302, after cement grout 10 is poured into grouting pump 23, start grouting pump 23, first discharge the pipeline of grouting pump 23
In air, then grouting pump 23 and Grouting Pipe 20 are connected；
Step 303, by grouting pump 23 by cement grout 10 pass through the injection hole of Grouting Pipe 20 simulate pipe 7 in two plugs
In space between model configuration 8, the stopping slip casting of grouting pump 23 is closed when having the outflow of cement grout 10 in slurry recovering tube 6；
Step 304, borehole simulation pipe 7 is gently tapped with hammer, make the cement grout 10 between two plug model configurations 8
It is in close contact and discharges bubble therein；
Step 305, the slip casting of grouting pump 23 is again started up, slip casting is closed when having the outflow of cement grout 10 in slurry recovering tube 6
Pump 23 stops slip casting；
Step 306, the connection for disconnecting grouting pump 23 and Grouting Pipe 20, and by the grouting port of Grouting Pipe 20 and slurry recovering tube 6
Pulp returning port is blocked, and prevents cement grout 10 from flowing out；
Step 307, grouting pump 23 is cleaned with clear water；The cement grout 10 remained in the pipeline of grouting pump 23 can so be prevented
The mouth of pipe is blocked after solidification, influences next use；
Step 308, multiple sensor 16-3 in acoustic emission system are respectively installed on the outer wall of borehole simulation pipe 7 not
It is connected at data acquiring location, and by the data acquisition cabinet 16-1 in acoustic emission system with computer 17；By borehole simulation
Pipe 7 stands one week, cement grout 10 is fully solidified, and in the process of setting of cement grout 10, is sent out by acoustic emission system collection sound
Penetrate signal data and the signal collected is transferred to computer 17 and recorded, for use by acoustic emission signal data research cement
Stress variation inside when slurries 10 solidify, and then the closure situation for studying borehole simulation pipe 7 uses；When it is implemented, due to
The phenomenon of local source quick release of energy generation Elastic wave is referred to as sound emission (Acoustic Emission, abbreviation in material
AE), otherwise referred to as stress wave is launched；Therefore, according to existing research in the prior art, by acoustic emission signal data with regard to energy
The stress variation inside when cement grout 10 solidifies enough is studied, and then studies the closure situation of borehole simulation pipe 7, judges drilling die
Intend whether having crack inside pipe 7；
Step 4: negative pressure ability is taken out in test, detailed process is：
Step 401, one end that vavuum pump 2 is connected to gas pumping pipe 5 by vavuum pump connecting tube 19；
Step 402, start vavuum pump 2, detection of negative pressure is carried out to borehole simulation pipe 7, observes the reading of pressure vacuum gauge 3 simultaneously
Record is maximum up to negative pressure；When borehole simulation pipe 7 reaches maximum reachable negative pressure, vavuum pump 2 is closed, and close and be arranged on vacuum
Vacuum switch 4 in pump connecting tube 19；It is to pass through sight when it is implemented, judging that borehole simulation pipe 7 reaches maximum up to negative pressure
The reading realization of pressure vacuum gauge 3 is examined, when the reading of pressure vacuum gauge 3 reaches maximum and does not continue to rise in 1~5 minute
Gao Shi, it is judged as that borehole simulation pipe 7 has reached maximum reachable negative pressure；
Step 403, the reading and record for observing pressure vacuum gauge 3, when the reading of pressure vacuum gauge 3 is in 10~30 minutes
When unchanged, it is judged as sealing of hole success, performs step 5；Otherwise, when pressure vacuum gauge 3 reading in 10~30 minutes drastically
During decline, it is judged as that sealing of hole fails, repeat step one to step 3, simulates injection hole sealing again；
When it is implemented, in order to avoid the internal crack of cement grout 10 influences to test the test effect for taking out negative pressure ability,
Before step 4, first visually observe in borehole simulation pipe 7 at the closure of cement grout 10, if having larger crackle or larger
Space；The acoustic emission signal data that acoustic emission system collects are observed on computer 17 again；And drilling is gently tapped with hammer
Pipe 7 is simulated, the acoustic emission signal data situation that acoustic emission system collects is observed on computer 17, judges cement grout
Whether larger crackle or larger space are had inside 10.
Step 5: influence of the diverse location gas leakage of detection borehole simulation pipe 7 to mash gas extraction concentration, detailed process are：
Step 501, gas detector 24 is connected in vavuum pump connecting tube 19 by gas detector connecting tube 25, and
Methane gas tank 15 is connected to the other end of gas pumping pipe 5 by methane gas tank connecting tube 12；
Step 502, methane gas tank switch 14 and gas pumping switch 11 are opened, will by methane gas tank connecting tube 12
Methane gas in methane gas tank 15 is introduced in borehole simulation pipe 7, there is provided the drilling gas of laboratory simulation；Observe gas pressure
The reading of power table 13, the gas pressure in borehole simulation pipe 7 is set to be in steady state value；
Step 503, start vavuum pump 2, gas pumping is carried out to borehole simulation pipe 7, open the leakage at diverse location successively
Gas detection switch 9, and record the reading of gas detector 24 when the gas leakage detection switch 9 at diverse location is opened.Record
Mash gas extraction concentration during the 7 diverse location gas leakage of borehole simulation pipe is descended.Because the quantity in crack simulation hole 1 is 6, its
In the aperture in 2 cracks simulation hole 1 be 2mm, wherein the aperture in 2 cracks simulation hole 1 is 3mm, hole 1 is simulated in 2 cracks in addition
Aperture be 4mm；The external diameter of the crack simulation pipe 17 is engaged with the aperture in crack simulation hole 1；Therefore, this makes it possible to examine
The mash gas extraction concentration during crack simulation hole gas leakage of diverse location, different pore size is surveyed, for analyzing diverse location, different pore size
Influence of the crack to drilling gas extraction.
In the present embodiment, make grouting pressure by observing the registration of grouting pressure table 21 in step 303 and step 305
Reach more than 1.5MPa.Cement grout 10 is injected by borehole simulation pipe under more than 1.5MPa with pressure situation by grouting pump 23
In space in 7 between two plug model configurations 8, it can ensure that cement grout 10 is more closely knit, fill cement grout 10
The crack of inside is reduced after fractional condensation is solid.
As shown in figure 3, carrying out the method for sealing material sealing property test using the utility model, comprise the following steps：
Step 1: experiment early-stage preparations, detailed process are：
Step 101, one section of a diameter of 135mm lucite tube is taken to take one section of a diameter of 75mm as borehole simulation pipe 7
Lucite tube as gas pumping pipe 5, take one section of PVC aluminium-plastic pipe as Grouting Pipe 20, take one section of PVC aluminium-plastic pipe as returning
Starch pipe 6；When it is implemented, the diameter as the Grouting Pipe 20 and the PVC aluminium-plastic pipes of slurry recovering tube 6 is 20mm；
Step 102,6 cracks simulation hole 1 is outputed on the tube wall of borehole simulation pipe 7, wherein 2 cracks simulation hole 1
Aperture is 2mm, wherein the aperture in 2 cracks simulation hole 1 is 3mm, the aperture in 2 cracks simulation hole 1 is 4mm in addition；
Step 103, gas pumping pipe 5, Grouting Pipe 20 and slurry recovering tube 6 stopped up with iron wire, and make Grouting Pipe 20 solid
The downside of gas pumping pipe 5 is scheduled on, slurry recovering tube 6 is fixed on the upside of gas pumping pipe 5；
Step 104, cotton gauze is cut into strip, is wrapped in two standards on gas pumping pipe 5, Grouting Pipe 20 and slurry recovering tube 6
The standby opening position that plug model configuration 8 is set, and be respectively provided with the both sides of cotton gauze for preventing plug model configuration 8 to the left and right
The pad 18 of diffusion；When it is implemented, by cotton gauze be cut into width be 6cm~8cm strip, due to plug model configuration 8 by
Polyurethane foam is formed, therefore by setting pad 18 in the both sides of cotton gauze, can prevent that polyurethane foam is uneven, causes
Sealing effectiveness is poor or even sealing of hole fails；
Step 2: prefabricated plug model configuration 8 and forming slip casting space, detailed process is：
Step 201, after liquid polyurethane is poured into beaker, liquid polyurethane is dipped using brush and is uniformly applied to cotton yarn
On cloth, and liquid polyurethane is set to penetrate into completely in cotton gauze；When it is implemented, because polyurethane is chemical material, and it is poisonous,
When therefore carrying out step operation, it should put on one's gloves, prevent from splashing on hand；
Step 202, the gas pumping pipe 5 after liquid polyurethane will be smeared, the entirety of Grouting Pipe 20 and slurry recovering tube 6 puts brill into
Casement is intended in pipe 7, and fixed good position, gas pumping pipe 5 is located at the middle position of the radial direction of gas pumping pipe 5；By gas
Drainage tube 5 is located at the middle position of the radial direction of gas pumping pipe 5, is advantageous to liquid polyurethane and foams to form plug model configuration 8,
Drilling can preferably be blocked.When it is implemented, because the time of liquid polyurethane foaming is shorter, therefore step 202 is whole
Operating process should try one's best briefly, prevent liquid polyurethane foams before putting into borehole simulation pipe 7 from finishing；
The overall placement of step 203, the borehole simulation pipe 7 that will be fed into after gas pumping pipe 5, Grouting Pipe 20 and slurry recovering tube 6
Fixed on test-bed, and by borehole simulation pipe 7, avoid borehole simulation pipe 7 from sliding, stand two days afterwards, wait liquid
Polyurethane foam forms plug model configuration 8 completely；
Step 3: toward injection sealing material 26 in borehole simulation pipe 7, and eye slit closure situation, detailed process are：
Step 301, cleaning grouting pump 23, and check grouting pump 23, it is ensured that grouting pump 23 is intact；
Step 302, after sealing material 26 is poured into grouting pump 23, start grouting pump 23, first discharge the pipeline of grouting pump 23
In air, then grouting pump 23 and Grouting Pipe 20 are connected；
Step 303, by grouting pump 23 by sealing material 26 pass through the injection hole of Grouting Pipe 20 simulate pipe 7 in two plugs
In space between model configuration 8, observe and record that sealing material 26 is 2mm to aperture, aperture is 3mm and aperture is that 4mm splits
Gap simulates the closure situation in hole 1；And by the level of borehole simulation pipe 7 and be obliquely installed, simulate inclined drill and horizontal drilling, observation
When recording horizontal borehole simulation pipe 7 and inclination, sealing material 26 is 2mm to aperture, the crack that aperture is 3mm and aperture is 4mm
Simulate the closure situation in hole 1；The registration of blocking time from grouting pressure table 21 reaches specified grouting pressure and crack simulation hole 1 is opened
During beginning lysimeter, simulate the completely blocked i.e. no leakage in hole 1 to crack and terminate, to the crack in same aperture under experiment condition of the same race
The simulation blocking time of hole 1 is averaged processing；When it is implemented, it is more than 1.5MPa to specify grouting pressure；
Step 304, grouting pump 23 is cleaned with clear water；The sealing material 26 remained in the pipeline of grouting pump 23 can so be prevented
The mouth of pipe is blocked after solidification, influences next use；
Step 4: negative pressure ability is taken out in test, detailed process is：
Step 401, one end that vavuum pump 2 is connected to gas pumping pipe 5 by vavuum pump connecting tube 19；
Step 402, start vavuum pump 2, detection of negative pressure is carried out to borehole simulation pipe 7, observes the reading of pressure vacuum gauge 3 simultaneously
Record is maximum up to negative pressure；When borehole simulation pipe 7 reaches maximum reachable negative pressure, vavuum pump 2 is closed, and close and be arranged on vacuum
Vacuum switch 4 in pump connecting tube 19, observe the reading and record of pressure vacuum gauge 3.When it is implemented, judge borehole simulation
Pipe 7 reaches maximum up to negative pressure, is what is realized by observing the reading of pressure vacuum gauge 3, when the reading of pressure vacuum gauge 3 reaches
It is maximum and when rise was not continued in 1~5 minute, it is judged as that borehole simulation pipe 7 has reached maximum reachable negative pressure.
When it is implemented, in order to carry out contrast experiment, two row's size and locations can also be outputed one by one in a step 102
Hole 1 is simulated in corresponding crack, is first blocked row crack simulation hole 1 with sealed solid glue when testing for the first time, it is next time right to do
The row crack after Kaifeng is blocked up is disclosed during than experiment with pin again and simulates hole 1, while is simulated other row crack with sealed solid glue
Hole 1 blocks, and rotary drilling simulation pipe 7, crack simulation hole 1 is located at the top of borehole simulation pipe 7.
In the present embodiment, the sealing material 26 is polyurethane, ordinary cement, expanding cement or PD materials.
It is described above, only it is preferred embodiment of the present utility model, not the utility model is imposed any restrictions, every
Any simple modification, change and the equivalent structure change made according to the utility model technical spirit to above example, still
Belong in the protection domain of technical solutions of the utility model.
Claims (6)
- A kind of 1. Drillhole gas pumping laboratory analog system, it is characterised in that：Including borehole simulation pipe (7), sealing of hole Filling system, gas pressure simulated loading system and gas detector (24), and acoustic emission system and with acoustic emission system phase The computer (17) connect；The interior two of the borehole simulation pipe (7) is provided with plug model configuration (8), is simulated positioned at two plugs Multiple crack simulations hole (1) are provided with the tube wall of one section of borehole simulation pipe (7) between structure (8), hole is simulated in the crack (1) crack simulation pipe (17) is connected with, gas leakage detection switch (9) is connected with the crack simulation pipe (17)；The hole-sealing grouting system includes Grouting Pipe (20) and the slurry recovering tube (6) stretched into borehole simulation pipe (7), and and slip casting Manage the grouting pump (23) of (20) connection；Slip casting handle (22) and grouting pressure table (21) are provided with the grouting pump (23)；The gas pressure simulated loading system includes being connected to gas pumping pipe (5) one end by vavuum pump connecting tube (19) Vavuum pump (2) and the methane gas tank (15) that gas pumping pipe (5) other end is connected to by methane gas tank connecting tube (12), Pressure vacuum gauge (3) and vacuum switch (4) are connected with the vavuum pump connecting tube (19), the methane gas tank (15) Methane gas tank switch (14) is provided with methane gas outlet, gas pressure is connected with the methane gas tank connecting tube (12) Power table (13) and gas pumping switch (11)；The Grouting Pipe (20) is fixed on the downside of gas pumping pipe (5), the slurry recovering tube (6) upside of gas pumping pipe (5) is fixed on, the gas detector (24) is connected to by gas detector connecting tube (25) In vavuum pump connecting tube (19).
- 2. according to a kind of Drillhole gas pumping laboratory analog system described in claim 1, it is characterised in that：It is described Borehole simulation pipe (7) is made up of a diameter of 135mm lucite tube, gas pumping pipe (5) the having by a diameter of 75mm Machine glass tube is made, and the Grouting Pipe (20) and slurry recovering tube (6) are made by PVC aluminium-plastic pipes.
- 3. according to a kind of Drillhole gas pumping laboratory analog system described in claim 1, it is characterised in that：It is described Plug model configuration (8) is by the cotton gauze that is wrapped on gas pumping pipe (5), Grouting Pipe (20) and slurry recovering tube (6) and uniformly The liquid polyurethane foaming being applied on cotton gauze is formed, and the both sides of the plug model configuration (8) are provided with for preventing The pad (18) that plug model configuration (8) spreads to the left and right.
- 4. according to a kind of Drillhole gas pumping laboratory analog system described in claim 1, it is characterised in that：It is described Gas detector (24) is light interference type gas detector.
- 5. according to a kind of Drillhole gas pumping laboratory analog system described in claim 1, it is characterised in that：It is described Acoustic emission system is SAEU2S acoustic emission systems, and the SAEU2S acoustic emission systems include data acquisition cabinet (16-1) and passed through The multichannel preamplifier (16-2) that cable is connected with data acquisition cabinet (16-1), the input of the preamplifier (16-2) End is connected with sensor (16-3) by signal wire, and the data acquisition cabinet (16-1) passes through USB connecting lines and computer (17) connect.
- 6. according to a kind of Drillhole gas pumping laboratory analog system described in claim 1, it is characterised in that：It is described The quantity of crack simulation hole (1) is 6, wherein the aperture of 2 crack simulations hole (1) is 2mm, wherein 2 crack simulations hole (1) Aperture be 3mm, the aperture of 2 cracks simulation hole (1) is 4mm in addition；The external diameter and crack mould of the crack simulation pipe (17) The aperture for intending hole (1) is engaged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721286670.XU CN207194943U (en) | 2017-09-30 | 2017-09-30 | A kind of Drillhole gas pumping laboratory analog system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721286670.XU CN207194943U (en) | 2017-09-30 | 2017-09-30 | A kind of Drillhole gas pumping laboratory analog system |
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| Publication Number | Publication Date |
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| CN207194943U true CN207194943U (en) | 2018-04-06 |
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| CN201721286670.XU Expired - Fee Related CN207194943U (en) | 2017-09-30 | 2017-09-30 | A kind of Drillhole gas pumping laboratory analog system |
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| CN (1) | CN207194943U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112196491A (en) * | 2020-09-29 | 2021-01-08 | 清华大学 | Combined type grading controllable hole packer device and method for underground engineering |
| NL2028338A (en) * | 2021-05-31 | 2021-08-30 | North China Inst Science & Tech | An integrated leak detection and sealing device for methane gas drainage drilled hole |
| NL2031041B1 (en) * | 2022-02-22 | 2023-09-06 | Univ Anhui Sci & Technology | Device for testing airtightness of hole sealing material and use method |
-
2017
- 2017-09-30 CN CN201721286670.XU patent/CN207194943U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112196491A (en) * | 2020-09-29 | 2021-01-08 | 清华大学 | Combined type grading controllable hole packer device and method for underground engineering |
| CN112196491B (en) * | 2020-09-29 | 2024-03-19 | 清华大学 | Combined grading controllable hole packer device and method for underground engineering |
| NL2028338A (en) * | 2021-05-31 | 2021-08-30 | North China Inst Science & Tech | An integrated leak detection and sealing device for methane gas drainage drilled hole |
| NL2031041B1 (en) * | 2022-02-22 | 2023-09-06 | Univ Anhui Sci & Technology | Device for testing airtightness of hole sealing material and use method |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20180406 Termination date: 20180930 |