CN107542486B - Drilling gas extraction laboratory simulation method and sealing material method for testing tightness - Google Patents
Drilling gas extraction laboratory simulation method and sealing material method for testing tightness Download PDFInfo
- Publication number
- CN107542486B CN107542486B CN201710944003.4A CN201710944003A CN107542486B CN 107542486 B CN107542486 B CN 107542486B CN 201710944003 A CN201710944003 A CN 201710944003A CN 107542486 B CN107542486 B CN 107542486B
- Authority
- CN
- China
- Prior art keywords
- pipe
- grouting
- gas
- simulation
- borehole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention discloses a kind of drilling gas extraction laboratory simulation method, including step：First, early-stage preparations are tested；2nd, prefabricated plug model configuration and slip casting space is formed；3rd, sealing of hole is simulated in the slip casting in borehole simulation pipe, and the acoustic emission signal data for studying crack closure situation are acquired by acoustic emission system；4th, negative pressure ability is taken out in test；5th, influence of the detection borehole simulation pipe different location gas leakage to mash gas extraction concentration；The invention also discloses a kind of sealing material method for testing tightness, including step：First, early-stage preparations are tested；2nd, prefabricated plug model configuration and slip casting space is formed；3rd, the injection sealing material in borehole simulation pipe, and eye slit blocks situation；4th, negative pressure ability is taken out in test.The present invention can real simulation field condition, the manpower and materials for testing consuming are few, and experiment effect is good, and experimental result accuracy is high, highly practical.
Description
Technical field
The invention belongs to drilling gas extraction technical fields, and in particular to a kind of drilling gas extraction laboratory simulation method
And sealing material method for testing tightness.
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, there is serious threat to the safety in production of mine, 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
More than 80% gas is sucked by drilling, 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) from this some holes in gap access under the action of extraction negative pressure, so as to cause under gas extraction concentration
Drop, directly results in that coal mine sealing of hole difficulty is big, present situation of sealing of hole effect difference.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 there are minimal amount of for sealing of hole sections
Gas leakage, it is all that the pressure value made is relatively low, lead to the judge to gas bearing and prominent situation large error or even make not
When control prece and measure.According to prevention 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
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 carries 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 performance of influence and sealing material of the research the wall of a borehole crack gas leakage to drilling gas extraction.
Invention content
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, simple in structure, novel in design rationally it is convenient to realize, can real simulation field condition, and will
The experiment done at the scene is needed to move in laboratory, the manpower and materials for testing consuming are few, and experiment effect is good, experimental result it is accurate
Property it is high, it is highly practical, convenient for promoting 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；Both ends are provided with plug simulation knot in the borehole simulation pipe
Structure is provided with multiple cracks simulation holes on the tube wall of one section of borehole simulation pipe between two plug model configurations, described
Simulation pipe in crack is connected on the simulation hole of crack, gas leakage detection switch is connected on the crack simulation pipe；
The hole-sealing grouting system includes the Grouting Pipe stretched into borehole simulation pipe and slurry recovering tube and is connect with Grouting Pipe
Grouting pump；Slip casting handle and grouting pressure table are provided on the grouting pump；
The gas pressure simulated loading system includes being connected to the true of gas pumping pipe one end by vacuum pump connecting tube
Sky pump and the methane gas tank of borehole simulation pipe one end is connected to by methane gas tank connecting tube, in the vacuum pump connecting tube
Pressure vacuum gauge and vacuum switch are connected with, being provided with methane gas tank in the methane gas outlet of the methane gas tank opens
It closes, gas pressure table and gas pumping switch is connected in the methane gas tank connecting tube；The Grouting Pipe is fixed on gas
The downside of drainage tube, the slurry recovering tube are fixed on the upside of gas pumping pipe, and the gas detector is connected by gas detector
It takes over and is connected in vacuum 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
The lucite tube of 135mm is made, and the gas pumping pipe is made of the lucite tube of a diameter of 75mm, the Grouting Pipe and
Slurry recovering tube is made of 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 both provided with the gasket 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 connect more including data gather computer case and by cable with data gather computer case
Road preamplifier, the input terminal of the preamplifier are connected with sensor by signal wire, and the data gather computer case leads to
USB connecting lines are crossed to connect 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 a, wherein the aperture in 2 cracks simulation hole is 2mm, wherein the aperture in 2 cracks simulation hole is 3mm, in addition 2 crack simulations
The aperture in hole is 4mm；The outer diameter of the crack simulation pipe is matched with the aperture in crack simulation hole.
The present invention also provides a kind of method and step is simple, it is convenient to realize, can acquire acoustic emission signal data and will adopt
The signal transmission collected is recorded to computer, 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
Different location, different pore size crack simulation hole gas leakage when mash gas extraction concentration drilling gas extraction laboratory simulation side
Method, which is characterized in that this method includes the following steps：
Step 1: experiment early-stage preparations, detailed process are：
Step 101 takes the lucite tube of one section of a diameter of 135mm 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 outputs multiple crack simulation holes on the tube wall of borehole simulation pipe, and simulates to connect in hole in crack and split
Gap simulation pipe connects gas leakage detection switch on crack simulation pipe；
Step 103 stops up gas pumping pipe, Grouting Pipe and slurry recovering tube with iron wire, and Grouting Pipe is made to be fixed on watt
The downside of this drainage tube makes slurry recovering tube be fixed on the upside of gas pumping pipe；
Cotton gauze is cut into strip by step 104, is wrapped in two preparations on gas pumping pipe, Grouting Pipe and slurry recovering tube and is set
At the position for putting plug model configuration, and it is respectively provided with what is spread to the left and right for preventing plug model configuration in the both sides of cotton gauze
Gasket；
Step 2: prefabricated plug model configuration and forming slip casting space, detailed process is：
Step 201 after liquid polyurethane is poured into beaker, dips liquid polyurethane using brush and is uniformly applied to cotton yarn
On cloth, and liquid polyurethane is made to penetrate into cotton gauze completely；
Step 202 puts the entirety for smearing the gas pumping pipe after liquid polyurethane, Grouting Pipe and slurry recovering tube into drilling die
Intend in pipe, and fixed good position, make gas pumping pipe be located at borehole simulation 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 rack, and borehole simulation pipe is fixed, borehole simulation pipe is avoided to slide, stand two days later, wait for liquid polyurethane hair
Holotype is finished into plug model configuration；
Step 3: the slip casting in borehole simulation pipe, simulates sealing of hole, and acquired 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, starts grouting pump, first discharges the air in slip casting pump conduit,
Grouting pump and Grouting Pipe are connected again；
Cement grout is simulated two plug simulation knots in pipe by step 303 by grouting pump by Grouting Pipe injection hole
In space between structure, grouting pump stopping slip casting being closed when having cement grout outflow in slurry recovering tube；
Step 304 gently taps borehole simulation pipe with hammer, makes the cement grout between two plug model configurations close
It contacts and discharges bubble therein；
Step 305 is again started up grouting pump slip casting, and 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 cleans grouting pump with clear water；
Multiple sensors in acoustic emission system are respectively installed on the outer wall of borehole simulation pipe different numbers by step 308
At acquisition position, and the data gather computer case in acoustic emission system is connect with computer；Borehole simulation pipe is stood one week,
Cement grout is made fully to solidify, in cement grout process of setting, acoustic emission signal data is acquired by acoustic emission system and will be adopted
The signal transmission collected is recorded to computer, 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 vacuum pump is connected to gas pumping pipe by vacuum pump connecting tube；
Step 402 starts vacuum pump, carries out detection of negative pressure 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, vacuum pump is closed, and closes and is arranged on vacuum pump company
The vacuum switch taken over；
Step 403, observe pressure vacuum gauge reading and record, when pressure vacuum gauge reading in 10~30 minutes nothing
During variation, it is judged as sealing of hole success, performs step 5；Otherwise, under the reading of pressure vacuum gauge is in 10~30 minutes drastically
During drop, it is judged as that sealing of hole fails, repeats step 1 to step 3, simulate injection hole sealing again；
Step 5: influence of the detection borehole simulation pipe different location gas leakage to mash gas extraction concentration, detailed process are：
Gas detector is connected to by gas detector connecting tube in vacuum pump connecting tube by step 501, and by gas
Gas tank is connected to one end of borehole simulation pipe by methane gas tank connecting tube；
Step 502 opens methane gas tank switch and gas pumping switch, by methane gas tank connecting tube by device in Gas
Methane gas in body tank is introduced in borehole simulation pipe, provides 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 starts vacuum pump, and gas pumping is carried out to borehole simulation pipe, opens the gas leakage at different location successively
Detection switch, and record the reading of gas detector when the gas leakage detection switch at different 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.
The present invention also provides a kind of method and step is simple, it is convenient to realize, sealing material sealing performance testing efficiency is high
Sealing material sealing performance test method, which is characterized in that this method includes the following steps：
Step 1: experiment early-stage preparations, detailed process are：
Step 101 takes the lucite tube of one section of a diameter of 135mm 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 outputs 6 cracks simulation hole 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, in addition the aperture in 2 cracks simulation hole is 4mm；
Step 103 stops up gas pumping pipe, Grouting Pipe and slurry recovering tube with iron wire, and Grouting Pipe is made to be fixed on watt
The downside of this drainage tube makes slurry recovering tube be fixed on the upside of gas pumping pipe；
Cotton gauze is cut into strip by step 104, is wrapped in two preparations on gas pumping pipe, Grouting Pipe and slurry recovering tube and is set
At the position for putting plug model configuration, and it is respectively provided with what is spread to the left and right for preventing plug model configuration in the both sides of cotton gauze
Gasket；
Step 2: prefabricated plug model configuration and forming slip casting space, detailed process is：
Step 201 after liquid polyurethane is poured into beaker, dips liquid polyurethane using brush and is uniformly applied to cotton yarn
On cloth, and liquid polyurethane is made to penetrate into cotton gauze completely；
Step 202 puts the entirety for smearing the gas pumping pipe after liquid polyurethane, Grouting Pipe and slurry recovering tube into drilling die
Intend in pipe, and fixed good position, make gas pumping pipe be located at borehole simulation 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 rack, and borehole simulation pipe is fixed, borehole simulation pipe is avoided to slide, stand two days later, wait for liquid polyurethane hair
Holotype is finished into plug model configuration；
Step 3: the injection sealing material in borehole simulation pipe, and eye slit blocks situation, detailed process is：
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, starts grouting pump, first discharges the air in slip casting pump conduit,
Grouting pump and Grouting Pipe are connected again；
Sealing material is simulated two plug simulation knots in pipe by step 303 by grouting pump by Grouting Pipe injection hole
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 level and inclination, the closure feelings in hole are simulated in the crack 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, is made even to the crack simulation hole blocking time in aperture similary under experiment condition of the same race
Average value processing；
Step 304 cleans grouting pump with clear water；
Step 4: negative pressure ability is taken out in test, detailed process is：
Step 401, one end that vacuum pump is connected to gas pumping pipe by vacuum pump connecting tube；
Step 402 starts vacuum pump, carries out detection of negative pressure 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, vacuum pump is closed, and closes and is arranged on vacuum pump company
The vacuum switch taken over observes 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.
Compared with the prior art, the present invention has the following advantages：
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 easy to operate, underground trials are changed to
Laboratory directly substitutes the drilling gas extraction of underground using simulation system, is equivalent in proportion contract the scene of underground
As low as laboratory reduces the underground trials time, reduces operation difficulty, has saved the manpower and materials expended needed for experiment, and
Substantially increase test efficiency and 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 the connection crack simulation pipe 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 different 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 has dramatically approached the condition at scene.
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. acquires acoustic emission signal data by acoustic emission system and carries out collected signal transmission to computer
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 different 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 performance, influence of the research the wall of a borehole different location gas leakage to gas pumping, carries out drilling gas extraction laboratory simulation etc.；
It is not only able to simulation 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, is had great significance to the unstability of borehole sealing section.
It 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 influencing 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 the maximum 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 acquire sound
Transmitting signal data simultaneously records collected signal transmission to computer, 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 different location, different pore size can also be detected.
9th, the method and step of sealing material sealing performance test method of the present invention is simple, and it is convenient to realize, sealing material sealing
Performance test is efficient.
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, highly practical, convenient for promoting the use of.
In conclusion the present invention is novel in design rationally, 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, and the manpower and materials for testing consuming are few, and experiment effect is good, and the accuracy of experimental result is high,
It is highly practical, convenient for promoting the use of.
Below by drawings and examples, technical scheme of the present invention is described in further detail.
Description of the drawings
Fig. 1 is the structure diagram of drilling gas extraction laboratory analog system of the present invention.
Fig. 2 is for drilling gas extraction laboratory analog system of the present invention for when carrying out drilling gas extraction laboratory simulation
Usage state diagram.
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 performance is tested
Usage state diagram.
Fig. 5 is the method flow block diagram of sealing material sealing performance test method of the present invention.
Reference sign:
Simulate hole in 1-crack；2-vacuum 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 gather computer case；16-2-preamplifier；16-3-sensor；
17-crack simulation pipe；18-gasket；19-vacuum 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.
Specific 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 to connect with acoustic emission system
Calculation machine 17；Both ends are 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 on the tube wall of section borehole simulation pipe 7, simulation pipe in crack is connected on the crack simulation hole 1
17, the crack simulates and is connected with gas leakage detection switch 9 on pipe 17；
The hole-sealing grouting system includes stretching into Grouting Pipe 20 in borehole simulation pipe 7 and slurry recovering tube 6 and and Grouting Pipe
The grouting pump 23 of 20 connections；Slip casting handle 22 and grouting pressure table 21 are provided on the grouting pump 23；
The gas pressure simulated loading system includes being connected to 5 one end of gas pumping pipe by vacuum pump connecting tube 19
Vacuum pump 2 and the methane gas tank 15 that 7 one end of borehole simulation pipe is connected to by methane gas tank connecting tube 12, the vacuum pump
Pressure vacuum gauge 3 and vacuum switch 4 are connected in connecting tube 19, is set in the methane gas outlet of the methane gas tank 15
There is methane gas tank to switch 14, gas pressure table 13 and gas pumping switch are connected in 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 vacuum pump connecting tube 19 by gas detector connecting tube 25.When it is implemented, described watt
This gas tank connecting tube 12 is hose.The gas detector 24 is connected to by gas detector connecting tube 25 positioned at vacuum pressure
In one section of vacuum pump connecting tube 19 between power table 3 and vacuum switch 4.
In the present embodiment, the borehole simulation pipe 7 is made of the lucite tube of a diameter of 135mm, the gas pumping
Pipe 5 is made of the lucite tube of a diameter of 75mm, and the Grouting Pipe 20 and slurry recovering tube 6 are made of 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 gasket 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 gather computer case 16-1 and multichannel preamplifier 16-2 being connect with data gather computer case 16-1 by cable, it is described preposition
The input terminal of amplifier 16-2 is connected with sensor 16-3 by signal wire, and the data gather computer case 16-1 is connected by USB
Line is connect 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 in addition the aperture in 2 cracks simulation hole 1 is 4mm；Simulate pipe 17 in the crack
The aperture in outer diameter and crack simulation hole 1 match.
As shown in Figures 2 and 3, drilling gas extraction laboratory simulation method of the invention, includes the following steps：
Step 1: experiment early-stage preparations, detailed process are：
Step 101 takes the lucite tube of one section of a diameter of 135mm 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 is outputed multiple crack simulation holes 1 on the tube wall of borehole simulation pipe 7, and is connected in simulating hole 1 in crack
Crack simulation pipe 17 is connect, the connection gas leakage detection switch 9 on crack simulation pipe 17；
Step 103 stops up gas pumping pipe 5, Grouting Pipe 20 and slurry recovering tube 6 with iron wire, and makes Grouting Pipe 20 solid
The downside of gas pumping pipe 5 is scheduled on, slurry recovering tube 6 is made to be fixed on the upside of gas pumping pipe 5；
Cotton gauze is cut into strip by step 104, is wrapped in two standards on gas pumping pipe 5, Grouting Pipe 20 and slurry recovering tube 6
At the position of standby setting plug model configuration 8, and it is respectively provided in the both sides of cotton gauze to prevent plug model configuration 8 to the left and right
The gasket 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 gasket 18 in the both sides of cotton gauze, polyurethane foam can be prevented uneven, caused
Sealing effect 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, dips liquid polyurethane using brush and is uniformly applied to cotton yarn
On cloth, and liquid polyurethane is made to penetrate into cotton gauze completely；When it is implemented, since polyurethane is chemical material, and toxic,
When therefore carrying out step operation, it should wear gloves, prevent from splashing on hand；
Step 202 puts the entirety for smearing the gas pumping pipe 5 after liquid polyurethane, Grouting Pipe 20 and slurry recovering tube 6 into brill
Casement is intended in pipe 7, and fixed good position, and gas pumping pipe 5 is made to be located at the middle position of 7 radial direction of borehole simulation pipe；By gas
Drainage tube 5 is located at the middle position of 5 radial direction of gas pumping pipe, is conducive to liquid polyurethane and foams to form plug model configuration 8,
Drilling can preferably be blocked.When it is implemented, due to liquid polyurethane foaming time it is shorter, step 202 it is entire
Operating process should be brief as possible, prevents liquid polyurethane from foaming before putting into borehole simulation pipe 7 and finishes；
Step 203 will be fed into the whole of the borehole simulation pipe 7 after gas pumping pipe 5, Grouting Pipe 20 and slurry recovering tube 6 and place
It is fixed on test-bed, and by borehole simulation pipe 7, borehole simulation pipe 7 is avoided to slide, stand two days later, wait for liquid
Polyurethane foam forms plug model configuration 8 completely；
Step 3: the slip casting in borehole simulation pipe 7, sealing of hole is simulated, and acquires by acoustic emission system to study crack
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, starts grouting pump 23, first discharges 23 pipeline of grouting pump
In air, then grouting pump 23 and Grouting Pipe 20 are connected；
Cement grout 10 is simulated two plugs in pipe 7 by step 303 by grouting pump 23 by 20 injection hole of Grouting Pipe
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 gently taps borehole simulation pipe 7 with hammer, makes the cement grout 10 between two plug model configurations 8
It is in close contact and discharges bubble therein；
Step 305 is again started up 23 slip casting of grouting pump, and 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 cleans grouting pump 23 with clear water；Remaining cement grout 10 in 23 pipeline of grouting pump can be prevented in this way
Nozzle is blocked after solidification, influences next use；
Multiple sensor 16-3 in acoustic emission system are respectively installed on the outer wall of borehole simulation pipe 7 not by step 308
It is connect at data acquiring location, and by the data gather computer case 16-1 in acoustic emission system with computer 17；By borehole simulation
Pipe 7 stands one week, and cement grout 10 is made fully to solidify, and in 10 process of setting of cement grout, is sent out by acoustic emission system acquisition sound
It penetrates signal data and records collected signal transmission to computer 17, 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
Local source quick release of energy generates the referred to as sound emission of the phenomenon that Elastic wave (Acoustic Emission, abbreviation in material
AE), otherwise referred to as stress wave emits；Therefore, according to existing research in the prior art, by acoustic emission signal data with regard to energy
Stress variation inside when enough research cement grout 10 solidifies, and then the closure situation of borehole simulation pipe 7 is studied, judge 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 vacuum pump 2 is connected to gas pumping pipe 5 by vacuum pump connecting tube 19；
Step 402 starts vacuum pump 2, carries out detection of negative pressure 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, vacuum pump 2 is closed, and close and be arranged on vacuum
Pump the vacuum switch 4 in 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 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 the reading of pressure vacuum gauge 3 in 10~30 minutes drastically
During decline, it is judged as that sealing of hole fails, repeats step 1 to step 3, simulate injection hole sealing again；
When it is implemented, in order to avoid the test effect that 10 internal crack of cement grout influences test pumping 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
Gap；The collected acoustic emission signal data of acoustic emission system are observed on computer 17 again；And drilling is gently tapped with hammer
Pipe 7 is simulated, the collected acoustic emission signal data situation of acoustic emission system is observed on computer 17, judges cement grout
Whether larger crackle or larger gap are had inside 10.
Step 5: influence of the 7 different location gas leakage of detection borehole simulation pipe to mash gas extraction concentration, detailed process are：
Gas detector 24 is connected to by gas detector connecting tube 25 in vacuum pump connecting tube 19 by step 501, and
Methane gas tank 15 is connected to one end of borehole simulation pipe 7 by methane gas tank connecting tube 12；
Step 502 opens methane gas tank switch 14 and gas pumping switch 11, will by methane gas tank connecting tube 12
Methane gas in methane gas tank 15 is introduced in borehole simulation pipe 7, provides the drilling gas of laboratory simulation；Observe gas pressure
The reading of power table 13 makes the gas pressure in borehole simulation pipe 7 be in steady state value；
Step 503 starts vacuum pump 2, and gas pumping is carried out to borehole simulation pipe 7, opens the leakage at different location successively
Gas detection switch 9, and record the reading of gas detector 24 when the gas leakage detection switch 9 at different location is opened.Record
Mash gas extraction concentration during the 7 different location gas leakage of borehole simulation pipe is descended.Since the quantity in crack simulation hole 1 is 6,
In the aperture in 2 cracks simulation hole 1 be 2mm, wherein the aperture in 2 cracks simulation hole 1 is 3mm, other 2 cracks simulation hole 1
Aperture be 4mm；The outer diameter of the crack simulation pipe 17 is matched 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 different location, different pore size is surveyed, for analyzing different 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 the situation of more than 1.5MPa with pressure 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
Internal crack is reduced after fractional condensation is solid.
As shown in Figure 4 and Figure 5, sealing material sealing performance test method of the invention, includes the following steps：
Step 1: experiment early-stage preparations, detailed process are：
Step 101 takes the lucite tube of one section of a diameter of 135mm 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 outputs 6 cracks simulation hole 1 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, in addition the aperture in 2 cracks simulation hole 1 is 4mm；
Step 103 stops up gas pumping pipe 5, Grouting Pipe 20 and slurry recovering tube 6 with iron wire, and makes Grouting Pipe 20 solid
The downside of gas pumping pipe 5 is scheduled on, slurry recovering tube 6 is made to be fixed on the upside of gas pumping pipe 5；
Cotton gauze is cut into strip by step 104, is wrapped in two standards on gas pumping pipe 5, Grouting Pipe 20 and slurry recovering tube 6
At the position of standby setting plug model configuration 8, and it is respectively provided in the both sides of cotton gauze to prevent plug model configuration 8 to the left and right
The gasket 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 gasket 18 in the both sides of cotton gauze, polyurethane foam can be prevented uneven, caused
Sealing effect 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, dips liquid polyurethane using brush and is uniformly applied to cotton yarn
On cloth, and liquid polyurethane is made to penetrate into cotton gauze completely；When it is implemented, since polyurethane is chemical material, and toxic,
When therefore carrying out step operation, it should wear gloves, prevent from splashing on hand；
Step 202 puts the entirety for smearing the gas pumping pipe 5 after liquid polyurethane, Grouting Pipe 20 and slurry recovering tube 6 into brill
Casement is intended in pipe 7, and fixed good position, and gas pumping pipe 5 is made to be located at the middle position of 7 radial direction of borehole simulation pipe；By gas
Drainage tube 5 is located at the middle position of 5 radial direction of gas pumping pipe, is conducive to liquid polyurethane and foams to form plug model configuration 8,
Drilling can preferably be blocked.When it is implemented, due to liquid polyurethane foaming time it is shorter, step 202 it is entire
Operating process should be brief as possible, prevents liquid polyurethane from foaming before putting into borehole simulation pipe 7 and finishes；
Step 203 will be fed into the whole of the borehole simulation pipe 7 after gas pumping pipe 5, Grouting Pipe 20 and slurry recovering tube 6 and place
It is fixed on test-bed, and by borehole simulation pipe 7, borehole simulation pipe 7 is avoided to slide, stand two days later, wait for liquid
Polyurethane foam forms plug model configuration 8 completely；
Step 3: the injection sealing material 26 in borehole simulation pipe 7, and eye slit blocks situation, detailed process is：
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, starts grouting pump 23, first discharges 23 pipeline of grouting pump
In air, then grouting pump 23 and Grouting Pipe 20 are connected；
Sealing material 26 is simulated two plugs in pipe 7 by step 303 by grouting pump 23 by 20 injection hole of Grouting Pipe
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 is split
Gap simulates the closure situation in hole 1；And by 7 level of borehole simulation pipe 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 aperture similary under experiment condition of the same race
Simulation 1 blocking time of hole is averaged processing；When it is implemented, specified grouting pressure is more than 1.5MPa；
Step 304 cleans grouting pump 23 with clear water；Remaining sealing material 26 in 23 pipeline of grouting pump can be prevented in this way
Nozzle 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 vacuum pump 2 is connected to gas pumping pipe 5 by vacuum pump connecting tube 19；
Step 402 starts vacuum pump 2, carries out detection of negative pressure 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, vacuum pump 2 is closed, and close and be arranged on vacuum
The vacuum switch 4 in connecting tube 19 is pumped, observes 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 raising 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 rows of 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 with needle again during than experiment and simulates hole 1, while simulated other row crack with sealed solid glue
Hole 1 blocks, and rotary drilling simulation pipe 7, and crack simulation hole 1 is made to be 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.
The above is only presently preferred embodiments of the present invention, not the present invention is imposed any restrictions, every according to the present invention
Any simple modification, change and the equivalent structure that technical spirit makees above example change, and still fall within skill of the present invention
In the protection domain of art scheme.
Claims (8)
1. a kind of drilling gas extraction laboratory simulation method, the drilling gas extraction laboratory analog system used includes boring
Casement intends pipe (7), hole-sealing grouting system, gas pressure simulated loading system and gas detector (24) and acoustic emission system
With the computer to connect with acoustic emission system；The interior both ends of the borehole simulation pipe (7) are provided with plug model configuration (8), are located at
Multiple crack simulations hole (1), institute are provided on the tube wall of one section of borehole simulation pipe (7) between two plug model configurations (8)
It states and crack simulation pipe (17) is connected in crack simulation hole (1), gas leakage detection switch is connected on the crack simulation pipe (17)
(9)；The hole-sealing grouting system includes stretching into Grouting Pipe (20) in borehole simulation pipe (7) and slurry recovering tube (6) and and slip casting
Manage the grouting pump (23) of (20) connection；Slip casting handle (22) and grouting pressure table (21) are provided on the grouting pump (23)；Institute
It states gas pressure simulated loading system and includes the vacuum pump that gas pumping pipe (5) one end is connected to by vacuum pump connecting tube (19)
(2) and by methane gas tank connecting tube (12) the methane gas tank (15) of borehole simulation pipe (7) one end, the vacuum are connected to
Pressure vacuum gauge (3) and vacuum switch (4), the methane gas of the methane gas tank (15) are connected in pump connecting tube (19)
Methane gas tank switch (14) is provided in outlet, gas pressure table (13) is connected on the methane gas tank connecting tube (12)
(11) are switched with gas pumping；The Grouting Pipe (20) is fixed on the downside of gas pumping pipe (5), and the slurry recovering tube (6) is fixed
In the upside of gas pumping pipe (5), the gas detector (24) is connected to vacuum pump by gas detector connecting tube (25)
In connecting tube (19)；It is characterized in that, this method includes the following steps：
Step 1: experiment early-stage preparations, detailed process are：
Step 101 takes the lucite tube of one section of a diameter of 135mm as borehole simulation pipe (7), takes 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 is outputed multiple crack simulations hole (1) on the tube wall of borehole simulation pipe (7), and is simulated in hole (1) in crack
Crack simulation pipe (17) is connected, connection gas leakage detection switch (9) on pipe (17) is simulated in crack；
Step 103 stops up gas pumping pipe (5), Grouting Pipe (20) and slurry recovering tube (6), and make Grouting Pipe with iron wire
(20) downside of gas pumping pipe (5) is fixed on, slurry recovering tube (6) is made to be fixed on the upside of gas pumping pipe (5)；
Cotton gauze is cut into strip by step 104, is wrapped in gas pumping pipe (5), Grouting Pipe (20) and upper two of slurry recovering tube (6)
At the position for preparing setting plug model configuration (8), and it is respectively provided in the both sides of cotton gauze to prevent plug model configuration (8)
The gasket (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, dips liquid polyurethane using brush and is uniformly applied to cotton gauze
On, and liquid polyurethane is made to penetrate into cotton gauze completely；
Step 202 puts the entirety for smearing the gas pumping pipe (5) after liquid polyurethane, Grouting Pipe (20) and slurry recovering tube (6) into
In borehole simulation pipe (7), and fixed good position, make gas pumping pipe (5) positioned at the centre position of borehole simulation pipe (7) radial direction
Place；
Step 203, the entirety that will be fed into the borehole simulation pipe (7) 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, borehole simulation pipe (7) is avoided to slide, stand two days later,
Liquid polyurethane foaming is waited for form plug model configuration (8) completely；
Step 3: toward borehole simulation pipe (7) interior slip casting, sealing of hole is simulated, and is acquired by acoustic emission system and is 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), starts grouting pump (23), first discharges grouting pump (23)
Air in pipeline, then grouting pump (23) and Grouting Pipe (20) are connected；
Cement grout (10) is simulated in pipe (7) two by step 303 by grouting pump (23) by Grouting Pipe (20) injection hole
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 gently taps borehole simulation pipe (7) with hammer, makes the cement grout between two plug model configurations (8)
(10) it is in close contact and discharges bubble therein；
Step 305 is again started up grouting pump (23) slip casting, and note is closed when having cement grout (10) outflow in slurry recovering tube (6)
Stock pump (23) stops slip casting；
Step 306 disconnects 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 cleans grouting pump (23) with clear water；
Multiple sensors (16-3) in acoustic emission system are respectively installed on the outer wall of borehole simulation pipe (7) not by step 308
It is connect at data acquiring location, and by the data gather computer case (16-1) in acoustic emission system with computer；By borehole simulation
It manages (7) and stands one week, cement grout (10) is made fully to solidify, in cement grout (10) process of setting, adopted by acoustic emission system
Collection acoustic emission signal data simultaneously record collected signal transmission to computer, for use by acoustic emission signal data research
Stress variation inside when 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 vacuum pump (2) is connected to gas pumping pipe (5) by vacuum pump connecting tube (19)；
Step 402 starts vacuum pump (2), and detection of negative pressure, the reading of observation pressure vacuum gauge (3) are carried out to borehole simulation pipe (7)
And it records maximum up to negative pressure；When borehole simulation pipe (7) reaches maximum reachable negative pressure, vacuum pump (2) is closed, and close setting
Vacuum switch (4) in vacuum 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, repeats step 1 to step 3, simulate injection hole sealing again；
Step 5: influence of detection borehole simulation pipe (7) the different location gas leakage to mash gas extraction concentration, detailed process are：
Gas detector (24) is connected to by gas detector connecting tube (25) in vacuum pump connecting tube (19) by step 501,
And methane gas tank (15) is connected to one end of borehole simulation pipe (7) by methane gas tank connecting tube (12)；
Step 502 opens methane gas tank switch (14) and gas pumping switch (11), passes through methane gas tank connecting tube (12)
Methane gas in methane gas tank (15) is introduced in borehole simulation pipe (7), the drilling gas of laboratory simulation is provided；Observation
The reading of gas pressure table (13) makes the gas pressure in borehole simulation pipe (7) be in steady state value；
Step 503 starts vacuum pump (2), and gas pumping is carried out to borehole simulation pipe (7), opens the leakage at different location successively
Gas detection switch (9), and record the reading of gas detector (24) when the gas leakage detection switch (9) at different location is opened.
2. drilling gas extraction laboratory simulation method described in accordance with the claim 1, it is characterised in that：The borehole simulation pipe
(7) be made of the lucite tube of a diameter of 135mm, the gas pumping pipe (5) by a diameter of 75mm organic glass control
Into the Grouting Pipe (20) and slurry recovering tube (6) are made of PVC aluminium-plastic pipes.
3. drilling gas extraction laboratory simulation method described in accordance with the 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 both provided with to prevent plug simulation knot
The gasket (18) that structure (8) is spread to the left and right.
4. drilling gas extraction laboratory simulation method described in accordance with the claim 1, it is characterised in that：The gas detector
(24) it is light interference type gas detector.
5. drilling gas extraction laboratory simulation method described in accordance with the claim 1, it is characterised in that：The acoustic emission system
For SAEU2S acoustic emission systems, the SAEU2S acoustic emission systems include data gather computer case (16-1) and pass through cable and data
The multichannel preamplifier (16-2) that cabinet (16-1) connects is acquired, the input terminal of the preamplifier (16-2) passes through signal
Line is connected with sensor (16-3), and the data gather computer case (16-1) is connect by USB connecting lines with computer.
6. drilling gas extraction laboratory simulation method described in accordance with the claim 1, it is characterised in that：Step 303 and step
Grouting pressure is made to reach more than 1.5MPa by observing the registration of grouting pressure table (21) in 305.
7. a kind of sealing material method for testing tightness, the system used include borehole simulation pipe (7), hole-sealing grouting system,
Gas pressure simulated loading system and gas detector (24) and acoustic emission system and the calculating to connect with acoustic emission system
Machine；The interior both ends of the borehole simulation pipe (7) are provided with plug model configuration (8), between two plug model configurations (8)
Multiple crack simulations hole (1) are provided on the tube wall of one section of borehole simulation pipe (7), is connected with and splits on crack simulation hole (1)
Gap simulation pipe (17), the crack simulation is managed is connected with gas leakage detection switch (9) on (17)；The hole-sealing grouting system includes stretching
Enter Grouting Pipe (20) and slurry recovering tube (6) in borehole simulation pipe (7) and the grouting pump (23) being connect with Grouting Pipe (20)；Institute
It states and slip casting handle (22) and grouting pressure table (21) is provided on grouting pump (23)；The gas pressure simulated loading system includes
The vacuum pump (2) of gas pumping pipe (5) one end is connected to and by methane gas tank connecting tube by vacuum pump connecting tube (19)
(12) the methane gas tank (15) of borehole simulation pipe (7) one end is connected to, vacuum is connected on the vacuum pump connecting tube (19)
Pressure gauge (3) and vacuum switch (4) are provided with methane gas tank and open in the methane gas outlet of the methane gas tank (15)
It closes (14), gas pressure table (13) and gas pumping switch (11) is connected on the methane gas tank connecting tube (12)；It is described
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 vacuum pump connecting tube (19) by gas detector connecting tube (25)；The crack simulation
The quantity in hole (1) is 6, wherein the aperture of 2 crack simulations hole (1) is 2mm, wherein the aperture of 2 crack simulations hole (1) is
3mm, in addition the aperture of 2 crack simulations hole (1) is 4mm；The outer diameter of the crack simulation pipe (17) and crack simulation hole (1)
Aperture matches；It is characterized in that, this method includes the following steps：
Step 1: experiment early-stage preparations, detailed process are：
Step 101 takes the lucite tube of one section of a diameter of 135mm as borehole simulation pipe (7), takes 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 outputs 6 crack simulations hole (1) on the tube wall of borehole simulation pipe (7), wherein 2 crack simulations hole (1)
Aperture for 2mm, wherein the aperture of 2 cracks simulations hole (1) is 3mm, in addition the aperture of 2 cracks simulations hole (1) is 4mm；
Step 103 stops up gas pumping pipe (5), Grouting Pipe (20) and slurry recovering tube (6), and make Grouting Pipe with iron wire
(20) downside of gas pumping pipe (5) is fixed on, slurry recovering tube (6) is made to be fixed on the upside of gas pumping pipe (5)；
Cotton gauze is cut into strip by step 104, is wrapped in gas pumping pipe (5), Grouting Pipe (20) and upper two of slurry recovering tube (6)
At the position for preparing setting plug model configuration (8), and it is respectively provided in the both sides of cotton gauze to prevent plug model configuration (8)
The gasket (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, dips liquid polyurethane using brush and is uniformly applied to cotton gauze
On, and liquid polyurethane is made to penetrate into cotton gauze completely；
Step 202 puts the entirety for smearing the gas pumping pipe (5) after liquid polyurethane, Grouting Pipe (20) and slurry recovering tube (6) into
In borehole simulation pipe (7), and fixed good position, make gas pumping pipe (5) positioned at the centre position of borehole simulation pipe (7) radial direction
Place；
Step 203, the entirety that will be fed into the borehole simulation pipe (7) 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, borehole simulation pipe (7) is avoided to slide, stand two days later,
Liquid polyurethane foaming is waited for form plug model configuration (8) completely；
Step 3: the injection sealing material (26) in borehole simulation pipe (7), and eye slit blocks situation, detailed process is：
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), starts grouting pump (23), first discharges grouting pump (23)
Air in pipeline, then grouting pump (23) and Grouting Pipe (20) are connected；
Sealing material (26) is simulated in pipe (7) two by step 303 by grouting pump (23) by Grouting Pipe (20) injection hole
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 crack simulation hole (1) of 4mm；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 the crack of 4mm；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 similary aperture is averaged processing under experiment condition；
Step 304 cleans grouting pump (23) with clear water；
Step 4: negative pressure ability is taken out in test, detailed process is：
Step 401, one end that vacuum pump (2) is connected to gas pumping pipe (5) by vacuum pump connecting tube (19)；
Step 402 starts vacuum pump (2), and detection of negative pressure, the reading of observation pressure vacuum gauge (3) are carried out to borehole simulation pipe (7)
And it records maximum up to negative pressure；When borehole simulation pipe (7) reaches maximum reachable negative pressure, vacuum pump (2) is closed, and close setting
Vacuum switch (4) in vacuum pump connecting tube (19), the reading and record of observation pressure vacuum gauge (3).
8. according to the sealing material method for testing tightness described in claim 7, it is characterised in that：The sealing material (26) is
Polyurethane, ordinary cement, expanding cement or PD materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710944003.4A CN107542486B (en) | 2017-09-30 | 2017-09-30 | Drilling gas extraction laboratory simulation method and sealing material method for testing tightness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710944003.4A CN107542486B (en) | 2017-09-30 | 2017-09-30 | Drilling gas extraction laboratory simulation method and sealing material method for testing tightness |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107542486A CN107542486A (en) | 2018-01-05 |
| CN107542486B true CN107542486B (en) | 2018-07-03 |
Family
ID=60967383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710944003.4A Active CN107542486B (en) | 2017-09-30 | 2017-09-30 | Drilling gas extraction laboratory simulation method and sealing material method for testing tightness |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107542486B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108894779B (en) * | 2018-09-14 | 2024-03-01 | 西安科技大学 | Coal gas extraction borehole instability discrimination test device and method |
| CN109441441B (en) * | 2018-11-15 | 2022-02-22 | 华北科技学院 | Simulation test device and method for coal seam bottom plate multi-angle inclined drilling grouting process under pressure-bearing flowing water action |
| CN110219699B (en) * | 2019-04-24 | 2020-04-03 | 中国矿业大学 | Device and method for measuring effective influence radius of gas extraction drill hole |
| CN110107279B (en) * | 2019-04-29 | 2022-05-17 | 淮阴工学院 | Gas hole sealing ground simulation experiment device |
| CN110410137A (en) * | 2019-08-30 | 2019-11-05 | 华北科技学院 | A kind of coal bed gas extraction intersects the experimental simulation device and experiment analogy method in string hole |
| CN111271051B (en) * | 2020-02-14 | 2023-03-28 | 辽宁工程技术大学 | Three-way loading mine drilling and hole sealing effect simulation test device and method |
| CN112727444B (en) * | 2021-01-05 | 2023-07-25 | 湖南科技大学 | Visual hole sealing material crack plugging performance testing device and method |
| CN112983536B (en) * | 2021-03-29 | 2023-04-28 | 贵州盘江煤电集团技术研究院有限公司 | Method for determining optimal grouting pressure of grouting seal of coal mine gas extraction drill hole |
| CN114215507B (en) * | 2021-05-21 | 2023-11-17 | 华北科技学院(中国煤矿安全技术培训中心) | Gas pressure measuring device and method based on directional drilling machine |
| CN114263444A (en) * | 2021-12-10 | 2022-04-01 | 贵州盘江精煤股份有限公司 | Simple processing method for preventing air leakage of drill hole |
| NL2031041B1 (en) * | 2022-02-22 | 2023-09-06 | Univ Anhui Sci & Technology | Device for testing airtightness of hole sealing material and use method |
| CN117703299A (en) * | 2024-02-06 | 2024-03-15 | 山东科技大学 | Visual sealing device and sealing method for gas extraction drilling |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4687060A (en) * | 1986-06-13 | 1987-08-18 | Methane Drainage Ventures | Production and grout liner for methane drainage in subterranean boreholes and method |
| CN201381872Y (en) * | 2009-03-13 | 2010-01-13 | 淮南矿业(集团)有限责任公司 | Hole-sealing pressure measuring device |
| CN101824999A (en) * | 2009-03-04 | 2010-09-08 | 中矿龙科能源科技（北京）有限公司 | Technology for measuring gas pressure of coal bed by utilizing through beds hole |
| CN102889958A (en) * | 2012-10-30 | 2013-01-23 | 山西潞安矿业(集团)有限责任公司 | Coal bed gas pressure direct measurement device and pressure measurement method thereof |
| CN104897872A (en) * | 2015-05-16 | 2015-09-09 | 中国矿业大学 | Closed goaf mashgas three-dimensional seepage simulation device and simulation method thereof |
| CN205154099U (en) * | 2015-11-20 | 2016-04-13 | 河南理工大学 | Experimental device for simulation gas hole sealing |
-
2017
- 2017-09-30 CN CN201710944003.4A patent/CN107542486B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4687060A (en) * | 1986-06-13 | 1987-08-18 | Methane Drainage Ventures | Production and grout liner for methane drainage in subterranean boreholes and method |
| CN101824999A (en) * | 2009-03-04 | 2010-09-08 | 中矿龙科能源科技（北京）有限公司 | Technology for measuring gas pressure of coal bed by utilizing through beds hole |
| CN201381872Y (en) * | 2009-03-13 | 2010-01-13 | 淮南矿业(集团)有限责任公司 | Hole-sealing pressure measuring device |
| CN102889958A (en) * | 2012-10-30 | 2013-01-23 | 山西潞安矿业(集团)有限责任公司 | Coal bed gas pressure direct measurement device and pressure measurement method thereof |
| CN104897872A (en) * | 2015-05-16 | 2015-09-09 | 中国矿业大学 | Closed goaf mashgas three-dimensional seepage simulation device and simulation method thereof |
| CN205154099U (en) * | 2015-11-20 | 2016-04-13 | 河南理工大学 | Experimental device for simulation gas hole sealing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107542486A (en) | 2018-01-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107542486B (en) | Drilling gas extraction laboratory simulation method and sealing material method for testing tightness | |
| CN106088174B (en) | A kind of soft clay area diaphram wall seepage detection system | |
| CN207194943U (en) | A kind of Drillhole gas pumping laboratory analog system | |
| CN106525526B (en) | A kind of measuring method of the high pressure water injection of raw coal containing gas and radial gas permeation rate | |
| CN103398933A (en) | Constant-pressure concrete permeability testing device | |
| CN105067494A (en) | Permeability testing method and device based on radial percolation experiment | |
| CN107870144A (en) | A kind of test device and method of coal petrography body strain crack permeability | |
| CN108507919B (en) | Shale full-diameter core starting pressure test method under radial flow flowing mode | |
| CN103644940A (en) | Coal seam gas pressure, gas flow and crustal stress monitoring device and monitoring method | |
| CN209821028U (en) | Rock core permeability testing arrangement | |
| CN102183447B (en) | Test system and test method for permeability coefficients of aquifer | |
| CN204255812U (en) | The device for testing permeability coefficient of original state coarse-grained soil | |
| CN102645395B (en) | Diaphragm wall permeability tester | |
| CN104713950B (en) | Sonic test coupling device and method of testing | |
| CN210032352U (en) | Steel bar sleeve with grouting quality monitoring device | |
| CN203822282U (en) | Confining pressure hydrofracture experimental facility | |
| CN206459937U (en) | A kind of packer permeability test device of engineering geological investigation | |
| CN104005747A (en) | Confining pressure hydraulic fracturing experiment device and use method thereof | |
| CN109187926A (en) | Three axis seepage flow test device of fractured coal and rock and desorption-diffusion-seepage tests system | |
| CN210005075U (en) | Water leakage monitoring device for plug and working pipe in drilling water-pressing test | |
| CN209606283U (en) | It is a kind of for measuring the automatic test device of soil layer infiltration coefficient | |
| CN108226191A (en) | Building has pipeline location and damage inspection apparatus and method | |
| CN206321172U (en) | It is a kind of to be used to test drilling fluid mud cake intensity and the test device of thickness | |
| CN206300876U (en) | A kind of concrete air transmission coefficient test device | |
| CN104453867A (en) | Drilling fluid dynamic coal seam borehole wall plugging tester |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |