CN107542486A - Drilling gas extraction laboratory analog system and method - Google Patents
Drilling gas extraction laboratory analog system and method Download PDFInfo
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- CN107542486A CN107542486A CN201710944003.4A CN201710944003A CN107542486A CN 107542486 A CN107542486 A CN 107542486A CN 201710944003 A CN201710944003 A CN 201710944003A CN 107542486 A CN107542486 A CN 107542486A
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Abstract
The invention discloses a kind of drilling gas extraction 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；The invention also discloses a kind of drilling gas extraction laboratory simulation method and a kind of sealing material sealing property method of testing.The present invention can real simulation field condition, test that the manpower and materials of consuming are few, and experiment effect is good, experimental result accuracy is high, practical.
Description
Technical field
The invention belongs to drilling gas extraction technical field, and in particular to a kind of drilling gas extraction laboratory analog system
And method.
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.
The content of the invention
In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that provide a kind of drilling gas
Extraction laboratory analog system, its is simple in construction, and novel in design rationally it is convenient to realize, can real simulation field condition, and will
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, experimental result it is accurate
Property it is high, it is practical, be easy to promote the use of.
In order to solve the above technical problems, the technical solution adopted by the present invention is：A kind of drilling gas extraction laboratory simulation
System, it is characterised in that：Including borehole simulation pipe, hole-sealing grouting system, gas pressure simulated loading system and gas detector,
And acoustic emission system and the computer that connects with acoustic emission system；Two is provided with plug simulation knot in the borehole simulation pipe
Structure, multiple cracks simulation holes are provided with the tube wall of one section of borehole simulation pipe between two plug model configurations, it is described
Simulation pipe in crack is connected with the simulation hole of crack, gas leakage detection switch is connected with the crack simulation pipe；
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.
Above-mentioned drilling gas extraction laboratory analog system, it is characterised in that：The borehole simulation pipe is by a diameter of
135mm lucite tube is made, and the gas pumping pipe is made up of a diameter of 75mm lucite tube, the Grouting Pipe and
Slurry recovering tube is made by PVC aluminium-plastic pipes.
Above-mentioned drilling gas extraction laboratory analog system, it is characterised in that：The plug model configuration is by being wrapped in
Cotton gauze and the uniform liquid polyurethane foaming structure being applied on cotton gauze on gas pumping pipe, Grouting Pipe and slurry recovering tube
Into 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.
Above-mentioned drilling gas extraction laboratory analog system, it is characterised in that：The gas detector is light interference type
Gas detector.
Above-mentioned drilling gas extraction laboratory analog system, it is characterised in that：The acoustic emission system is SAEU2S sound
Emission system, the SAEU2S acoustic emission systems are connected more including data acquisition cabinet and by cable with data acquisition cabinet
Road preamplifier, the input of the preamplifier are connected with sensor by signal wire, and the data acquisition cabinet leads to
USB connecting lines are crossed to be connected with computer.
Above-mentioned drilling gas extraction laboratory analog system, it is characterised in that：The quantity in the crack simulation hole is 6
It is individual, wherein the aperture in 2 cracks simulation hole is 2mm, wherein the aperture in 2 cracks simulation hole is 3mm, 2 crack simulations in addition
The aperture in hole is 4mm；The external diameter of the crack simulation pipe is engaged with the aperture in crack simulation hole.
Present invention also offers a kind of method and step is simple, it is convenient to realize, can gather acoustic emission signal data and will adopt
The signal collected is transferred to computer and recorded, when being solidified for use by acoustic emission signal data research cement grout inside should
Power changes, and then studies the closure situation of borehole simulation pipe, judges whether there is crack use inside borehole simulation pipe；It can also detect
Diverse location, different pore size crack simulation hole gas leakage when mash gas extraction concentration drilling gas extraction laboratory simulation side
Method, it is characterised in that this method comprises 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
Lucite tube as gas pumping pipe, take one section of PVC aluminium-plastic pipe as Grouting Pipe, take one section of PVC aluminium-plastic pipe as returning slurry
Pipe；
Step 102, multiple crack simulation holes are outputed on the tube wall of borehole simulation pipe, and simulate to connect in hole in crack and split
Gap simulation pipe, gas leakage detection switch is connected on crack simulation pipe；
Step 103, gas pumping pipe, Grouting Pipe and slurry recovering tube stopped up with iron wire, and Grouting Pipe is fixed on watt
The downside of this drainage tube, slurry recovering tube is set to be fixed on the upside of gas pumping pipe；
Step 104, cotton gauze is cut into strip, is wrapped in two preparations on gas pumping pipe, Grouting Pipe and slurry recovering tube and sets
The opening position of plug model configuration is put, and is respectively provided with what is spread to the left and right for preventing plug model configuration in the both sides of cotton gauze
Pad；
Step 2: prefabricated plug model configuration 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；
Step 202, the gas pumping pipe after liquid polyurethane will be smeared, the entirety of Grouting Pipe and slurry recovering tube puts drilling die into
Intend in pipe, and fixed good position, make gas pumping pipe be located at gas pumping caliber to middle position；
Step 203, the borehole simulation pipe that will be fed into after gas pumping pipe, Grouting Pipe and slurry recovering tube are integrally placed to test
On stand, and borehole simulation pipe is fixed, avoid borehole simulation pipe from sliding, stand two days afterwards, wait liquid polyurethane hair
Holotype is finished into plug model configuration；
Step 3: toward slip casting in borehole simulation pipe, sealing of hole is simulated, and gather by acoustic emission system and sealed for studying crack
The acoustic emission signal data of stifled situation, detailed process are：
Step 301, cleaning grouting pump, and check grouting pump, it is ensured that grouting pump is intact；
Step 302, after cement grout is poured into grouting pump, start grouting pump, first discharge the air in slip casting pump conduit,
Grouting pump and Grouting Pipe are connected again；
Step 303, cement grout is passed through by Grouting Pipe injection hole by grouting pump simulate two plugs simulation knot in pipe
In space between structure, grouting pump stopping slip casting being closed when having cement grout outflow in slurry recovering tube；
Step 304, borehole simulation pipe is gently tapped with hammer, make the cement grout between two plug model configurations close
Contact and discharge bubble therein；
Step 305, grouting pump slip casting is again started up, grouting pump is closed when having cement grout outflow in slurry recovering tube and is stopped
Slip casting；
Step 306, the connection for disconnecting grouting pump and Grouting Pipe, and the pulp returning port of the grouting port of Grouting Pipe and slurry recovering tube is blocked up
Firmly, prevent cement grout from flowing out；
Step 307, with clear water clean grouting pump；
Step 308, multiple sensors in acoustic emission system are respectively installed to different numbers on the outer wall of borehole simulation pipe
According to collection opening position, and the data acquisition cabinet in acoustic emission system is connected with computer；Borehole simulation pipe is stood one week,
Cement grout is fully solidified, in cement grout process of setting, acoustic emission signal data are gathered by acoustic emission system and will be adopted
The signal collected is transferred to computer and recorded, when being solidified for use by acoustic emission signal data research cement grout inside should
Power changes, and then the closure situation for studying borehole simulation pipe uses；
Step 4: negative pressure ability is taken out in test, detailed process is：
Step 401, one end that vavuum pump is connected to gas pumping pipe by vavuum pump connecting tube；
Step 402, start vavuum pump, detection of negative pressure is carried out to borehole simulation pipe, observes the reading and note of pressure vacuum gauge
Record is maximum up to negative pressure；When borehole simulation pipe reaches maximum reachable negative pressure, vavuum pump is closed, and closes and is arranged on vavuum pump company
Vacuum switch in adapter；
Step 403, observe pressure vacuum gauge reading and record, when pressure vacuum gauge reading in 10~30 minutes nothing
During change, it is judged as sealing of hole success, performs step 5；Otherwise, when pressure vacuum gauge reading in 10~30 minutes drastically under
During drop, it is judged as that sealing of hole fails, repeat step one to step 3, simulates injection hole sealing again；
Step 5: influence of the detection borehole simulation pipe diverse location gas leakage to mash gas extraction concentration, detailed process are：
Step 501, gas detector is connected in vavuum pump connecting tube by gas detector connecting tube, and by gas
Gas tank is connected to the other end of gas pumping pipe by methane gas tank connecting tube；
Step 502, methane gas tank switch and gas pumping switch are opened, by methane gas tank connecting tube by device in Gas
Methane gas in body tank is introduced in borehole simulation pipe, there is provided the drilling gas of laboratory simulation；Observe the reading of gas pressure table
Number, makes the gas pressure in borehole simulation pipe be in steady state value；
Step 503, start vavuum pump, gas pumping is carried out to borehole simulation pipe, open the gas leakage at diverse location successively
Detection switch, and record the reading of gas detector when the gas leakage detection switch at diverse location is opened.
Above-mentioned method, it is characterised in that：Made in step 303 and step 305 by observing the registration of grouting pressure table
Grouting pressure reaches more than 1.5MPa.
Present invention also offers a kind of method and step is simple, it is convenient to realize, sealing material sealing property testing efficiency is high
Sealing material sealing property method of testing, it is characterised in that this method comprises 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
Lucite tube as gas pumping pipe, take one section of PVC aluminium-plastic pipe as Grouting Pipe, take one section of PVC aluminium-plastic pipe as returning slurry
Pipe；
Step 102,6 cracks simulation hole is outputed on the tube wall of borehole simulation pipe, wherein the aperture in 2 cracks simulation hole
For 2mm, wherein the aperture in 2 cracks simulation hole is 3mm, the aperture in 2 cracks simulation hole is 4mm in addition；
Step 103, gas pumping pipe, Grouting Pipe and slurry recovering tube stopped up with iron wire, and Grouting Pipe is fixed on watt
The downside of this drainage tube, slurry recovering tube is set to be fixed on the upside of gas pumping pipe；
Step 104, cotton gauze is cut into strip, is wrapped in two preparations on gas pumping pipe, Grouting Pipe and slurry recovering tube and sets
The opening position of plug model configuration is put, and is respectively provided with what is spread to the left and right for preventing plug model configuration in the both sides of cotton gauze
Pad；
Step 2: prefabricated plug model configuration 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；
Step 202, the gas pumping pipe after liquid polyurethane will be smeared, the entirety of Grouting Pipe and slurry recovering tube puts drilling die into
Intend in pipe, and fixed good position, make gas pumping pipe be located at gas pumping caliber to middle position；
Step 203, the borehole simulation pipe that will be fed into after gas pumping pipe, Grouting Pipe and slurry recovering tube are integrally placed to test
On stand, and borehole simulation pipe is fixed, avoid borehole simulation pipe from sliding, stand two days afterwards, wait liquid polyurethane hair
Holotype is finished into plug model configuration；
Step 3: toward injection sealing material in borehole simulation pipe, and eye slit closure situation, detailed process are：
Step 301, cleaning grouting pump, and check grouting pump, it is ensured that grouting pump is intact；
Step 302, after sealing material is poured into grouting pump, start grouting pump, first discharge the air in slip casting pump conduit,
Grouting pump and Grouting Pipe are connected again；
Step 303, sealing material is passed through by Grouting Pipe injection hole by grouting pump simulate two plugs simulation knot in pipe
In space between structure, the crack simulation hole that sealing material is 2mm to aperture, aperture is 3mm and aperture is 4mm is observed and recorded
Closure situation；And by borehole simulation pipe level and be obliquely installed, inclined drill and horizontal drilling are simulated, observes and records borehole simulation
When pipe is horizontal and tilts, the closure feelings in the crack simulation hole that sealing material is 2mm to aperture, aperture is 3mm and aperture is 4mm
Condition；Blocking time since the registration of grouting pressure table reach specified grouting pressure and crack simulation hole lysimeter when, to crack
It is that no leakage terminates that simulation hole is blocked completely, and the crack simulation hole blocking time in same aperture under experiment condition of the same race is made even
Average value processing；
Step 304, with clear water clean grouting pump；
Step 4: negative pressure ability is taken out in test, detailed process is：
Step 401, one end that vavuum pump is connected to gas pumping pipe by vavuum pump connecting tube；
Step 402, start vavuum pump, detection of negative pressure is carried out to borehole simulation pipe, observes the reading and note of pressure vacuum gauge
Record is maximum up to negative pressure；When borehole simulation pipe reaches maximum reachable negative pressure, vavuum pump is closed, and closes and is arranged on vavuum pump company
Vacuum switch in adapter, observe the reading and record of pressure vacuum gauge.
Above-mentioned method, it is characterised in that：The sealing material is polyurethane, ordinary cement, expanding cement or PD materials.
The present invention has advantages below compared with prior art：
1st, the structure of drilling gas extraction laboratory analog system of the present invention is simple, novel in design reasonable, and it is convenient to realize.
2nd, the simple installation of drilling gas extraction laboratory analog system of the present invention, it is simple to operate, underground trials are changed to
Laboratory, the drilling gas extraction of underground is directly substituted using simulation system, be equivalent in proportion contract the scene of underground
As low as laboratory, reduce the underground trials time, reduce operation difficulty, save the manpower and materials expended needed for experiment, and
Substantially increase test efficiency and the degree of accuracy, 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, drilling gas extraction laboratory analog system of the present invention on the tube wall of borehole simulation pipe by opening up multiple split
Gap simulates hole, and simulation pipe in crack is connected on the simulation hole of crack, and gas leakage detection switch, Neng Goumo are connected on crack simulation pipe
Intend influence of the wall of a borehole diverse location gas leakage to gas pumping, can only be carried out in laboratory simulation before eliminating the wall of a borehole with
The simulation of material gas leakage, the condition at scene is dramatically approached.
4th, the detection means of drilling gas extraction laboratory analog system of the present invention is rich and varied, including acoustic emission system and
Gas detector etc., acoustic emission signal data are gathered by acoustic emission system and the signal collected is transferred to computer progress
Record, when can solidify for use by acoustic emission signal data research cement grout inside stress variation, and then research drilling die
Intend the closure situation of pipe, judge whether there is crack use inside borehole simulation pipe；Different positions can be detected by gas detector
Put, the crack of different pore size simulation hole gas leakage when mash gas extraction concentration, for analyzing the crack pair of diverse location, different pore size
The influence of drilling gas extraction.
5th, drilling gas extraction laboratory analog system of the present invention has multiple functions, can be used in detecting sealing material
Sealing property, influence of the research the wall of a borehole diverse location gas leakage to gas pumping, carries out drilling gas extraction laboratory simulation etc.；
It is not only able to simulate drilling gas extraction, additionally it is possible to when being directed to coal bed gas extraction, using acoustic emission system to borehole sealing
The crack of section is sprouted and spread scenarios are monitored in real time, and the unstability of borehole sealing section is had great significance.
6th, can be in laboratory pair The present invention reduces influence of many uncertain factors to result of the test in underground trials
The factor for influenceing experiment carries out Quantitative study, substantially increases the accuracy of experimental result.
7th, drilling gas extraction laboratory analog system of the present invention can provide one metastable watt for bore inner
This pressure and concentration, reduce the error of experiment, simulate the situation at scene to greatest extent.
8th, the method and step of drilling gas extraction laboratory simulation method of the present invention is simple, and it is convenient to realize, can gather sound
The signal collected is simultaneously transferred to computer and recorded by transmission signal data, for use by acoustic emission signal data research cement
Stress variation inside during grout cures, and then study the closure situation of borehole simulation pipe, judge inside borehole simulation pipe whether
There is crack use；The mash gas extraction concentration during crack simulation hole gas leakage of diverse location, different pore size can also be detected.
9th, the method and step of sealing material sealing property method of testing of the present invention is simple, and it is convenient to realize, sealing material sealing
Performance test efficiency high.
10th, the present invention can real simulation field condition, and the experiment for needing to do at the scene is moved in laboratory, tested
The manpower and materials of consuming are few, and experiment effect is good, practical, are easy to promote the use of.
In summary, the present invention is novel in design rationally, and it is convenient to realize, can real simulation field condition, and will need to exist
The experiment that scene is done is moved in laboratory, tests that the manpower and materials of consuming are few, and experiment effect is good, and the accuracy of experimental result is high,
It is practical, it is easy to promote the use of.
Below by drawings and examples, technical scheme is described in further detail.
Brief description of the drawings
Fig. 1 is the structural representation of drilling gas extraction laboratory analog system of the present invention.
When Fig. 2 is that drilling gas extraction laboratory analog system of the present invention is used to carry out drilling gas extraction laboratory simulation
Use state figure.
Fig. 3 is the method flow block diagram of drilling gas extraction laboratory simulation method of the present invention.
Fig. 4 is that drilling gas extraction laboratory analog system of the present invention is used to carry out when sealing material sealing property is tested
Use state figure.
Fig. 5 is the method flow block diagram of sealing material sealing property method of testing of the present invention.
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, the drilling gas extraction laboratory analog system of the present invention, including borehole simulation pipe 7, hole-sealing grouting
System, gas pressure simulated loading system and gas detector 24, and acoustic emission system and the meter that connects with acoustic emission system
Calculation machine 17；Two is provided with plug model configuration 8 in the borehole simulation pipe 7, and one between two plug model configurations 8
Multiple crack simulation holes 1 are provided with the tube wall of section borehole simulation pipe 7, simulation pipe in crack is connected with the crack simulation hole 1
17, the crack is simulated and is connected with gas leakage detection switch 9 on 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 Figures 2 and 3, drilling gas extraction laboratory simulation method of the invention, comprises 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, 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 4 and Figure 5, sealing material sealing property method of testing of the invention, comprises 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 presently preferred embodiments of the present invention, not the present invention is imposed any restrictions, it is every according to the present invention
Any simple modification, change and the equivalent structure change that technical spirit is made to above example, still fall within skill of the present invention
In the protection domain of art scheme.
Claims (10)
- A kind of 1. drilling gas extraction laboratory analog system, it is characterised in that：Including borehole simulation pipe (7), hole-sealing grouting system System, gas pressure simulated loading system and gas detector (24), and acoustic emission system and the meter to connect with acoustic emission system Calculation machine (17)；The interior two of the borehole simulation pipe (7) is provided with plug model configuration (8), positioned at two plug model configurations (8) Between one section of borehole simulation pipe (7) tube wall on be provided with multiple cracks simulation hole (1), connects on crack simulation hole (1) Crack simulation pipe (17) is connected to, 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 the drilling gas extraction laboratory analog system described in claim 1, it is characterised in that：The borehole simulation pipe (7) be made up of a diameter of 135mm lucite tube, the gas pumping pipe (5) by a diameter of 75mm lucite control Into the Grouting Pipe (20) and slurry recovering tube (6) are made by PVC aluminium-plastic pipes.
- 3. according to the drilling gas extraction laboratory analog system described in claim 1, it is characterised in that：The plug simulation knot Structure (8) is by the cotton gauze that is wrapped on gas pumping pipe (5), Grouting Pipe (20) and slurry recovering tube (6) and is uniformly applied to cotton yarn Liquid polyurethane foaming on cloth is formed, and the both sides of the plug model configuration (8) are provided with for preventing plug simulation knot The pad (18) that structure (8) spreads to the left and right.
- 4. according to the drilling gas extraction laboratory analog system described in claim 1, it is characterised in that：The gas detector (24) it is light interference type gas detector.
- 5. according to the drilling gas extraction laboratory analog system described in claim 1, it is characterised in that：The acoustic emission system For SAEU2S acoustic emission systems, the SAEU2S acoustic emission systems include data acquisition cabinet (16-1) and pass through cable and data The multichannel preamplifier (16-2) of cabinet (16-1) connection is gathered, the input of the preamplifier (16-2) passes through signal Line is connected with sensor (16-3), and the data acquisition cabinet (16-1) is connected by USB connecting lines with computer (17).
- 6. according to the drilling gas extraction laboratory analog system described in claim 1, it is characterised in that：Simulate hole in the crack (1) quantity is 6, wherein the aperture of 2 crack simulations hole (1) is 2mm, wherein the aperture of 2 crack simulations hole (1) is 3mm, the aperture of 2 crack simulations hole (1) is 4mm in addition；The external diameter of the crack simulation pipe (17) and crack simulation hole (1) Aperture is engaged.
- A kind of 7. method that drilling gas extraction laboratory simulation is carried out using system as claimed in claim 1, it is characterised in that This method comprises 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 as borehole simulation pipe (7), take one section of a diameter of 75mm's Lucite tube takes one section of PVC aluminium-plastic pipe to take one section of PVC aluminium-plastic pipe conduct as Grouting Pipe (20) as gas pumping pipe (5) Slurry recovering tube (6)；Step 102, multiple crack simulations hole (1) are outputed on the tube wall of borehole simulation pipe (7), and simulated in crack in hole (1) Crack simulation pipe (17) is connected, is simulated in crack and gas leakage detection switch (9) is connected on 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) downside of gas pumping pipe (5) is fixed 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 gas pumping pipe (5), Grouting Pipe (20) and upper two of slurry recovering tube (6) Prepare the opening position of setting plug model configuration (8), and be respectively provided with the both sides of cotton gauze for preventing plug model configuration (8) The pad (18) spread to the left and right；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 gauze On, and liquid polyurethane is penetrated into completely in cotton gauze；Step 202, the gas pumping pipe (5) after liquid polyurethane will be smeared, the entirety of Grouting Pipe (20) and slurry recovering tube (6) is put into In borehole simulation pipe (7), and fixed good position, gas pumping pipe (5) is located at the centre position of gas pumping pipe (5) radial direction Place；The entirety 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) It is placed on test-bed, and borehole simulation pipe (7) is fixed, avoid borehole simulation pipe (7) from sliding, stands two days afterwards, Liquid polyurethane foaming is waited to form plug model configuration (8) completely；Step 3: toward borehole simulation pipe (7) interior slip casting, sealing of hole is simulated, and gather by acoustic emission system and sealed for studying crack The acoustic emission signal data of stifled 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 grouting pump (23) Air in pipeline, then grouting pump (23) and Grouting Pipe (20) are connected；Step 303, cement grout (10) is simulated by Grouting Pipe (20) injection hole by grouting pump (23) and manages in (7) two In space between plug model configuration (8), grouting pump (23) is closed when having cement grout (10) outflow in slurry recovering tube (6) Stop slip casting；Step 304, borehole simulation pipe (7) is gently tapped with hammer, make the cement grout between two plug model configurations (8) (10) it is in close contact and discharges bubble therein；Step 305, grouting pump (23) slip casting is again started up, note is closed when having cement grout (10) outflow in slurry recovering tube (6) Stock pump (23) stops slip casting；Step 306, disconnect grouting pump (23) and the connection of Grouting Pipe (20), and by the grouting port and slurry recovering tube of Grouting Pipe (20) (6) pulp returning port is blocked, and prevents cement grout (10) from flowing out；Step 307, grouting pump (23) is cleaned with clear water；Step 308, multiple sensors (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)；Will drilling Simulation pipe (7) stands one week, cement grout (10) is fully solidified, and in cement grout (10) process of setting, passes through sound emission system System gathers acoustic emission signal data and the signal collected is transferred into computer (17) and recorded, for use by acoustic emission signal Stress variation inside when data research cement grout (10) solidifies, and then the closure situation for studying borehole simulation pipe (7) uses；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, the reading of observation pressure vacuum gauge (3) are carried out to borehole simulation pipe (7) And record maximum up to negative pressure；When borehole simulation pipe (7) reaches maximum reachable negative pressure, vavuum pump (2) is closed, and close setting Vacuum switch (4) in vavuum pump connecting tube (19)；The reading and record of step 403, observation 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 the reading of pressure vacuum gauge (3) was had to go to the toilet at 10~30 minutes When play declines, it is judged as that sealing of hole fails, repeat step one to step 3, simulates injection hole sealing again；Step 5: influence of detection borehole simulation pipe (7) the diverse location gas leakage 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, pass through 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；Observation The reading of gas pressure 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.
- 8. in accordance with the method for claim 1, it is characterised in that：By observing grouting pressure in step 303 and step 305 The registration of table (21), makes grouting pressure reach more than 1.5MPa.
- A kind of 9. method that sealing material sealing property test is carried out using system as claimed in claim 6, it is characterised in that should Method comprises 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 as borehole simulation pipe (7), take one section of a diameter of 75mm's Lucite tube takes one section of PVC aluminium-plastic pipe to take one section of PVC aluminium-plastic pipe conduct as Grouting Pipe (20) as gas pumping pipe (5) Slurry recovering tube (6)；Step 102,6 crack simulations hole (1) are outputed on the tube wall of borehole simulation pipe (7), wherein 2 crack simulations hole (1) Aperture be 2mm, wherein the aperture of 2 cracks simulation hole (1) be 3mm, the aperture that hole (1) is simulated in 2 cracks in addition is 4mm；Step 103, gas pumping pipe (5), Grouting Pipe (20) and slurry recovering tube (6) stopped up with iron wire, and make Grouting Pipe (20) downside of gas pumping pipe (5) is fixed 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 gas pumping pipe (5), Grouting Pipe (20) and upper two of slurry recovering tube (6) Prepare the opening position of setting plug model configuration (8), and be respectively provided with the both sides of cotton gauze for preventing plug model configuration (8) The pad (18) spread to the left and right；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 gauze On, and liquid polyurethane is penetrated into completely in cotton gauze；Step 202, the gas pumping pipe (5) after liquid polyurethane will be smeared, the entirety of Grouting Pipe (20) and slurry recovering tube (6) is put into In borehole simulation pipe (7), and fixed good position, gas pumping pipe (5) is located at the centre position of gas pumping pipe (5) radial direction Place；The entirety 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) It is placed on test-bed, and borehole simulation pipe (7) is fixed, avoid borehole simulation pipe (7) from sliding, stands two days afterwards, Liquid polyurethane foaming is waited to form 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 grouting pump (23) Air in pipeline, then grouting pump (23) and Grouting Pipe (20) are connected；Step 303, sealing material (26) is simulated by Grouting Pipe (20) injection hole by grouting pump (23) and manages in (7) two In space between plug model configuration (8), observe and record that sealing material (26) is 2mm to aperture, aperture is 3mm and aperture is The closure situation of 4mm crack simulation hole (1)；And by borehole simulation pipe (7) level and be obliquely installed, simulate inclined drill and water Flat drill hole, observe and record borehole simulation pipe (7) is horizontal and when tilting, and sealing material (26) is 2mm to aperture, aperture be 3mm and Aperture is that the closure situation of hole (1) is simulated in 4mm crack；The registration of blocking time from grouting pressure table (21) reaches specified slip casting When pressure and crack simulation hole (1) beginning lysimeter, simulate the completely blocked i.e. no leakage in hole (1) to crack and terminate, to of the same race Crack simulation hole (1) blocking time in same aperture is averaged processing under experiment condition；Step 304, grouting pump (23) is cleaned with clear water；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, the reading of observation pressure vacuum gauge (3) are carried out to borehole simulation pipe (7) And record maximum up to negative pressure；When borehole simulation pipe (7) reaches maximum reachable negative pressure, vavuum pump (2) is closed, and close setting Vacuum switch (4) in vavuum pump connecting tube (19), the reading and record of observation pressure vacuum gauge (3).
- 10. in accordance with the method for claim 9, it is characterised in that：The sealing material (26) be polyurethane, ordinary cement, Expanding cement or PD materials.
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