CN208364089U - A kind of coal mine gas pre-draining borehole flexibility sealing of hole system - Google Patents
A kind of coal mine gas pre-draining borehole flexibility sealing of hole system Download PDFInfo
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- CN208364089U CN208364089U CN201821694248.2U CN201821694248U CN208364089U CN 208364089 U CN208364089 U CN 208364089U CN 201821694248 U CN201821694248 U CN 201821694248U CN 208364089 U CN208364089 U CN 208364089U
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Abstract
The utility model discloses a kind of coal mine gas pre-draining borehole flexibility sealing of hole systems, drainage tube including being disposed side by side on gas pre-drainage borehole space, Grouting Pipe and two forcing pipes, gas pre-drainage borehole space is using one end of gas drainage as inner end, the other end is outer end, preceding air bag is disposed in gas pre-drainage borehole space from outside to inside, center sleeve and rear gasbag, center sleeve is made of symmetrically arranged upper air bag and lower gasbag one on the other, drainage tube passes through preceding air bag and rear gasbag, and it is clipped between air bag and lower gasbag, one sequentially passes through preceding air bag and upper air bag from outside to inside and penetrates rear gasbag in two forcing pipes；Another in two forcing pipes sequentially passes through preceding air bag and lower gasbag from outside to inside and penetrates rear gasbag；Grouting Pipe passes through preceding air bag, and is clipped between air bag and lower gasbag.The utility model is implemented simply, to effectively improve sealing of hole effect, easy to spread.
Description
Technical field
The utility model belongs to coal mine gas drainage technical field, and in particular to a kind of coal mine gas pre-draining borehole flexibility envelope
Hole system.
Background technique
Coal accounts for 70% or so in non-renewable energy production and consumption structure as the most important energy in China always.But
Since condition of coal seam occurrence is complicated and changeable, Gas-bearing Coal Seams are more, and coal mine gas reserves are big, thus China coal industry for a long time by
The threat of various natural calamities drastically influences the safety in production and sustainable development of mine.Gas Disaster is coal mining
One of the disaster of most serious in the process.According to statistics in 2006, the mine at the 609 of 100 state-owned emphasis mining listed corporations
In well, highly gassy mine accounts for 26.8%, and coal and gas outburst mine accounts for 17.6%, and low gaseous mine accounts for 55.6%.With exploitation
Depth is continuously increased, and gas emission continues to increase, and coal and gas prominent danger is also constantly increasing, highly gassy mine
Quantity is also increasing.Currently, the essence method of domestic prevention and treatment coal mine gas disaster is to carry out gas drainage, to ensure that gas is taken out
Adopt safe and efficient progress, the key for being effectively sealed to gas drainage of mash gas pumping drilling.
In the 1980s, Zhou Shining academician proposes active manometric method, the basic principle is that " sealing liquid, fluid-tight
Gas ", i.e., using liquid as sealing of hole substance, to solve the problems, such as solid matter can not tight closure drilling surrounding crack, and root
The pressure of sealing fluid is enabled to be slightly above the pressure of gas always in entire seal process according to the principle that fluid permeability depends on pressure difference
Power, to prevent the leakage of gas.In order to keep the pressure of sealing fluid and effectively prevent sealing section collapse hole, need in sealing fluid liquid
Block and solidify hole wall with high strength cement sill at the both ends of section, and the flexible weak intensity material of sealing fluid
Material, material is thus formed block liquid with solid, block the sealing system of gas with liquid.
.But it is often used mining cement grout injection hole sealing at present, including in other injection hole sealing modes, when slurries are solidifying
Gu can not be just sealed to the newborn crack to develop out during extraction, is blocked using solidification and mean that hole sealing device by nothing
Method recycles, and sealing material and a large amount of pipelines are all retained in hole, and a large amount of hole sealing devices belong to disposable substantially, material consumption
Take huge.For coal mine, this operation of single gas pre-drainage needs to put into a large amount of manpower and material resources every year.
Utility model content
The technical problem to be solved by the utility model is in view of the deficiency of the prior art, provide a kind of design
New reasonable, structure is simply, realization is convenient, can be realized a kind of coal mine gas pre-draining borehole flexibility sealing of hole of preferable sealing of hole effect
System.
In order to solve the above technical problems, the technical solution adopted in the utility model is: a kind of coal mine gas pre-draining borehole is soft
Property sealing of hole system, including drainage tube, Grouting Pipe and two forcing pipes being disposed side by side in gas pre-drainage borehole space, described watt
Using one end of gas drainage as inner end, the other end is outer end in this pre-draining borehole space, from outer in the gas pre-drainage borehole space
It is disposed with preceding air bag, center sleeve and rear gasbag to interior, the center sleeve is by symmetrically arranged upper air bag one on the other
It being formed with lower gasbag, the drainage tube passes through preceding air bag and rear gasbag, and between the upper air bag and lower gasbag of the air bag that is clipped in the middle,
In two forcing pipes wherein one sequentially pass through from outside to inside before air bag and constitute the upper air bag of center sleeve and after penetrating
Air bag；Other one in two forcing pipes sequentially pass through from outside to inside before air bag and constitute center sleeve lower gasbag and
Penetrate rear gasbag；Multiple first buckles are provided on the upper air bag, upper air bag is fixedly connected on by multiple first buckles
Drainage tube, Grouting Pipe and multiple sub- air bags are divided on the forcing pipe of upper air bag, and by upper air bag；On the lower gasbag
It is provided with and is buckled with fixed upper first snapped-in position of air bag identical multiple second, multiple second buckles consolidate lower gasbag
Surely drainage tube, Grouting Pipe are connected to and is divided into multiple lower sub- air bags on the forcing pipe of lower gasbag, and by lower gasbag；It passes through
Part on a piece forcing pipe of upper air bag in multiple sub- air bags and rear gasbag in preceding air bag, upper air bag is provided with gas
Hole, the part on a forcing pipe of lower gasbag in multiple lower sub- air bags and rear gasbag in preceding air bag, lower gasbag are equal
It is provided with stomata, is connected with gas valve on the stomata；The Grouting Pipe passes through preceding air bag, and the upper gas for the air bag that is clipped in the middle
Between capsule and lower gasbag, between preceding air bag and center sleeve, between rear gasbag and center sleeve and two neighboring sub- gas
It is provided with grouting serous fluid outlet in Grouting Pipe between capsule, is connected with slip casting valve in the grouting serous fluid outlet；
The preceding balloon ends are provided with the third buckle for air bag before sealing, and the third is buckled preceding air bag two
End is fixedly connected on drainage tube, Grouting Pipe and two forcing pipes；The rear gasbag is provided with the 4th close to center sleeve one end
Buckle, rear gasbag is fixedly connected on drainage tube and two forcing pipes by the 4th buckle close to center sleeve one end, described
Rear gasbag is provided with the 5th buckle far from center sleeve one end, and the 5th buckle fixes rear gasbag far from center sleeve one end
It is connected on drainage tube.
Above-mentioned a kind of coal mine gas pre-draining borehole flexibility sealing of hole system, it is characterised in that: the slip casting valve is unidirectional
Valve.
A kind of above-mentioned coal mine gas pre-draining borehole flexibility sealing of hole system, it is characterised in that: the drainage tube, Grouting Pipe and
Two forcing pipes are fixedly connected.
A kind of above-mentioned coal mine gas pre-draining borehole flexibility sealing of hole system, it is characterised in that: the drainage tube mash gas extraction
Gas end is provided with floral tube.
Above-mentioned a kind of coal mine gas pre-draining borehole flexibility sealing of hole system, it is characterised in that: the forcing pipe is pre- in gas
Draining borehole space outer end is connected with pressurizing device, and the pressurizing device includes air shooter and air pump, and the forcing pipe is gentle
The connection of body delivery pipe one end, the air shooter other end connect with air pump, on the air shooter from connect air pump to
Connection forcing pipe direction is connected with pressurization pipe valve and inflation gauge in turn.
Above-mentioned a kind of coal mine gas pre-draining borehole flexibility sealing of hole system, it is characterised in that: the upper sub- air bag and lower son
The diameter of air bag is respectively less than the radius of gas pre-drainage borehole space.
Above-mentioned a kind of coal mine gas pre-draining borehole flexibility sealing of hole system, it is characterised in that: the upper sub- air bag, lower sub- gas
Capsule, preceding air bag and rear gasbag are made of inflatable pipe, and the wall thickness of the inflatable pipe of sub- air bag and lower sub- air bag, which is greater than, in composition is constituted
The wall thickness of the inflatable pipe of preceding air bag and rear gasbag.
Compared with the prior art, the utility model has the following advantages:
1, preceding air bag and rear gasbag used in the utility model are flexible material, carry out plug using flexible material and solve to block up
The problem of single and poor sealing effect.
2, center sleeve described in the utility model is made of symmetrically arranged upper air bag and lower gasbag one on the other, upper air bag
On be provided with it is multiple first buckle, it is multiple first buckle by upper air bag be fixedly connected on drainage tube, Grouting Pipe and pass through upper air bag
Forcing pipe on, and upper air bag is divided into multiple sub- air bags；The first buckle with fixed upper air bag is provided on lower gasbag
Lower gasbag is fixedly connected on drainage tube, Grouting Pipe and passes through lower gas by identical multiple second buckles in position, multiple second buckles
On the forcing pipe of capsule, and lower gasbag is divided into multiple lower sub- air bags；It is formed by sub- air bag and on the one hand lower sub- air bag solves
In addition the single problem for causing sealing of hole effect undesirable of airbag form of having determined occupies the volume at sealing of hole position, reduce sealing of hole process
The usage amount of middle grouting serous fluid reduces cost, protects environment.
3, the utility model can be according to different coal, different cranny developments, different drilling depths, air bag, centre before adjusting
The length of air bag and rear gasbag is suitable for a variety of sealing of hole operations.
4, air bag, center sleeve and rear gasbag are flexible material before the utility model, using flexible material, are subjected to boring
The large range of deformation in hole, can generate new crack during extraction, and the elastic potential energy of air bag can promote slurries to continue to seep
Thoroughly, new crack is filled, is kept good sealing effectiveness；If the pressure in preceding air bag, center sleeve and rear gasbag declines, can and
Shi Fanfu is system pressurization.
5, the utility model does not change the common capsule-type in mining area substantially and blocks under the premise of guaranteeing effective sealing of hole effect
Process will not excessively increase the intensity and extra workload of construction.
6, the utility model is easy to implement in the limited underground in space, and after slip casting blocks, pressure is relatively mild in hole, base
Originally deep around-the-hole stress will not be caused significantly to disturb, borehole instability will not be led to because of sealing of hole.
To sum up the utility model is implemented simple, effectively improves sealing of hole effect, is suitable for most area mash gas extraction operations, easily
In popularization.
Below by drawings and examples, the technical solution of the utility model is described in further detail.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the utility model sealing of hole mechanism, the connection relationship diagram of gas drainage mechanism and slip casting mechanism.
Fig. 3 is the utility model sealing of hole mechanism sealing of hole position schematic diagram.
Fig. 4 is the utility model sealing of hole mechanism sealing of hole position partial enlargement diagram.
Sectional view when Fig. 5 is the utility model center sleeve non-slip casting pressurized state.
Sectional view when Fig. 6 is the utility model center sleeve slip casting pressurized state.
Sectional view when Fig. 7 is the utility model rear gasbag pressurized state.
Description of symbols:
1-preceding air bag；2-rear gasbags；3-drainage tubes；
4-forcing pipes；5-Grouting Pipes；6-slip casting valves；
7-gas valves；8-gas pre-drainage borehole spaces；9-slip casting regions；
10-slurry infiltration regions；11-center sleeves；11-1-goes up sub- air bag；
Sub- air bag under 11-2-；12-floral tubes；13-coal bodies；
14-gas drainages pump；15-gas delivery pipes；16-gas storage tanks；
17-gas pressure tables；18-gas drainage valves；19-pressurization pipe valves；
20-inflation gauges；21-air pumps；22-air shooters；
23-slip casting valves；24-grouting pumps；25-slurries storage tanks；
26-grouting pressure tables；27-grouting serous fluid delivery pipes；28-the first buckle；
29-the second buckle；30-thirds buckle；31-the four buckle；
32-the five buckle.
Specific embodiment
The coal mine gas pre-draining borehole flexibility sealing of hole system of the utility model, as shown in Figure 1, Figure 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and
It is described including drainage tube 3, Grouting Pipe 5 and two forcing pipes 4 being disposed side by side in gas pre-drainage borehole space 8 shown in Fig. 7
For gas pre-drainage borehole space 8 using one end of gas drainage as inner end, the other end is outer end, in the gas pre-drainage borehole space 8
Air bag 1, center sleeve 11 and rear gasbag 2 before being disposed with from outside to inside, the center sleeve 11 by symmetrically setting one on the other
Upper air bag and the lower gasbag composition set, the drainage tube 3 pass through preceding air bag 1 and rear gasbag 2, and the upper gas for the air bag 11 that is clipped in the middle
Between capsule and lower gasbag, in two forcing pipes 4 wherein one sequentially pass through from outside to inside before air bag 1 and constitute center sleeve
11 upper air bag and penetrate rear gasbag 2；Other one in two forcing pipes 4 sequentially passes through 1 He of preceding air bag from outside to inside
It constitutes the lower gasbag of center sleeve 11 and penetrates rear gasbag 2；Multiple first buckles 28 are provided on the upper air bag, it is multiple described
Upper air bag is fixedly connected on drainage tube 3, Grouting Pipe 5 and on the forcing pipe 4 of upper air bag by the first buckle 28, and by upper air bag
It is divided into multiple sub- air bag 11-1；It is provided on the lower gasbag identical more with the first 28 positions of buckle of fixed upper air bag
Lower gasbag is fixedly connected on drainage tube 3, Grouting Pipe 5 and passes through lower gasbag by a second buckle 29, multiple second buckles 29
Forcing pipe 4 on, and lower gasbag is divided into multiple lower sub- air bag 11-2；Before being located on a forcing pipe 4 of upper air bag
Part in air bag 1, upper air bag in multiple sub- air bag 11-1 and rear gasbag 2 is provided with stomata, across one of lower gasbag
Part on forcing pipe 4 in multiple lower sub- air bag 11-2 and rear gasbag 2 in preceding air bag 1, lower gasbag is provided with stomata, institute
It states and is connected with gas valve 7 on stomata；The Grouting Pipe 5 passes through preceding air bag 1, and the upper air bag for the air bag 11 that is clipped in the middle and lower gas
Between capsule, between preceding air bag 1 and center sleeve 11, between rear gasbag 2 and center sleeve 11 and two neighboring sub- air bag
It is provided with grouting serous fluid outlet in Grouting Pipe 5 between 11-1, is connected with slip casting valve 6 in the grouting serous fluid outlet；
1 both ends of preceding air bag are provided with the third buckle 30 for air bag 1 before sealing, the third buckle 30 will before
1 both ends of air bag are fixedly connected on drainage tube 3, Grouting Pipe 5 and two forcing pipes 4；The rear gasbag 2 is close to center sleeve 11 1
End is provided with the 4th buckle 31, and rear gasbag 2 is fixedly connected on drainage tube 3 close to 11 one end of center sleeve by the 4th buckle 31
On two forcing pipes 4, the rear gasbag 2 is provided with the 5th buckle 32, the 5th buckle 32 far from 11 one end of center sleeve
Rear gasbag 2 is fixedly connected on drainage tube 3 far from 11 one end of center sleeve；The gas drainage mechanism is connect with drainage tube 3,
The slip casting mechanism is connect with Grouting Pipe 5.When it is implemented, can be according to the depth of drilling, air bag 1, center sleeve 11 before changing
With the length of rear gasbag 2, it is applicable to a variety of sealing of hole operations.
In the present embodiment, as shown in Figure 3 and Figure 4, the slip casting valve 6 is check valve.
In the present embodiment, as shown in Figure 3 and Figure 4, the drainage tube 3, Grouting Pipe 5 are fixedly connected with two forcing pipes 4.
In the present embodiment, as shown in figure 3,3 mash gas extraction gas end of the drainage tube is provided with floral tube 12.
In the present embodiment, as shown in Figure 1, the forcing pipe 4 is connected with pressurization dress in 8 outer end of gas pre-drainage borehole space
It sets, the pressurizing device includes air shooter 22 and air pump 21, and the forcing pipe 4 is connected with 22 one end of air shooter, institute
It states 22 other end of air shooter to connect with air pump 21, from connection air pump 21 to connection forcing pipe 4 on the air shooter 22
Direction is connected with pressurization pipe valve 19 and inflation gauge 20 in turn.
In the present embodiment, as shown in figure 5, to be respectively less than gas pre- for the diameter of the upper sub- air bag 11-1 and lower sub- air bag 11-2
The radius in draining borehole space 8 can enter slip casting region 9 for grouting serous fluid and provide necessary condition.
In the present embodiment, the upper sub- air bag 11-1, lower sub- air bag 11-2, preceding air bag 1 and rear gasbag 2 are by inflatable pipe structure
At the wall thickness of the inflatable pipe of sub- air bag 11-1 and lower sub- air bag 11-2 is greater than the inflatable for constituting preceding air bag 1 and rear gasbag 2 in composition
The wall thickness of pipe；Under 0.3MPa pressure, the degrees of expansion of preceding air bag 1 and rear gasbag 2 is greater than the degrees of expansion of center sleeve 11, preceding
Air bag 1 and the first expansion plugging injection hole sealing section of rear gasbag 2 both ends, center sleeve 11 is in the full state but not swollen of inflating at this time
It is swollen；When pressure reaches 1MPa, center sleeve 11 is also at dilatancy state, squeezes slurries and enters slurry infiltration region 10.
When it is implemented, as shown in Fig. 2, the drainage tube 3 is connect with gas drainage mechanism, gas drainage mechanism packet
The gas storage tank 16 for including the gas delivery pipe 15 connecting with drainage tube 3 and being connect with gas delivery pipe 15, the gas conveying
Gas drainage is connected in turn to the direction of connection drainage tube 3 from connection gas holding vessel 16 on pipe 15 pumps 14, gas drainage valve
Door 18 and gas pressure table 17.The Grouting Pipe 5 is connect with slip casting mechanism, and slip casting mechanism includes the slip casting connecting with Grouting Pipe 5
Slurries delivery pipe 27 and the slurries storage tank 25 being connect with grouting serous fluid delivery pipe 27, from even in the grouting serous fluid delivery pipe 27
It connects slurries storage tank 25 and is connected with grouting pump 24, slip casting valve 23 and grouting pressure table 26 in turn to 5 direction of Grouting Pipe.
Using the utility model carry out coal mine gas drainage flexibility sealing of hole method the following steps are included:
Step 1: drilling: using drilling machine in tunnel internal drilling, forming gas pre-drainage borehole space 8, and clear up gas pre-drainage
Drilling cuttings in borehole space 8；When it is implemented, ensuring to be formed relatively stable gas pre-drainage borehole space 8, it is ensured that without deforming
Big or collapsing phenomenon；
Step 2: hole flushing: being rinsed at least 20min to gas pre-drainage borehole space 8 using high pressure water flow, then use high pressure
Air goes out the water assembled in gas pre-drainage borehole space 8；When it is implemented, the drilling machine used is water drilling, high pressure water flow and height
Pressure air is provided by drilling machine, and the pressure of high pressure water flow is 8kPa~15kPa, and the pressure of pressure-air is 8kPa~15kPa；Watt
The cleaning in this pre-draining borehole space 8 is thorough, it is ensured that without drilling cuttings in gas pre-drainage borehole space 8, the air bag 1 before drilling cuttings rests on
When with 2 present position of rear gasbag, plug effect will affect, cause grouting serous fluid to overflow from injection hole sealing section, influence sealing effect.
Step 3: injection hole sealing, detailed process are as follows:
Step 301, connection sealing of hole mechanism: the position of air bag 1, center sleeve 11 and rear gasbag 2 relative to drainage tube 3 before adjusting
It sets, gas valve 7 is connected on two forcing pipes 4, slip casting valve 6 is connected in Grouting Pipe 5, preceding air bag 1 is passed through the
Three buckles 30 are fixedly connected on drainage tube 3, Grouting Pipe 5 and two forcing pipes 4, by rear gasbag 2 close to 11 one end of center sleeve
It is fixedly connected on drainage tube 3 and two forcing pipes 4 by the 4th buckle 31, rear gasbag 2 is led to far from 11 one end of center sleeve
The 5th buckle 32 is crossed to be fixedly connected on drainage tube 3；By upper air bag by it is multiple first buckle 28 be fixedly connected on drainage tube 3,
Grouting Pipe 5 and multiple sub- air bag 11-1 are divided on the forcing pipe 4 of upper air bag, and by upper air bag；Lower gasbag is passed through
Multiple second buckles 29 are fixedly connected on drainage tube 3, Grouting Pipe 5 and on the forcing pipes 4 of lower gasbag, and lower gasbag is divided
For multiple lower sub- air bag 11-2；Drainage tube 3, Grouting Pipe 5 are fixedly connected with two forcing pipes 4；When it is implemented, carrying out preceding gas
The seal operation of capsule 1, center sleeve 11 and rear gasbag 2, it is ensured that gas leak phenomenon will not occur during entire sealing of hole；It will buckle
It is fixedly connected with position to fix, prevents from loosening during entire sealing of hole；
The sealing of hole mechanism connected in step 301 is integrally protruded into gas pre-drainage borehole space 8, and adjusted by step 302
Sealing of hole mechanism to default injection hole sealing position；When it is implemented, to ensure before sealing of hole mechanism protrudes into gas pre-drainage borehole space 8
Slip casting valve 6 and gas valve 7 can be opened normally, avoid that the changing of the relative positions occurs when pressurization and slip casting；
Step 303 carries out injection hole sealing: firstly, being connect drainage tube 3 with gas delivery pipe 15 by quick coupling, leading to
It crosses quick coupling and connect Grouting Pipe 5 with grouting serous fluid delivery pipe 27, and pass through quick coupling for forcing pipe 4 and air shooter
22 connections；It is then shut off slip casting valve 23 and gas drainage valve 18, opens pressurization pipe valve 19, booster air pump 21, when inflation is pressed
When 20 registration of power table reaches 0.3MPa, stop pressurization, closes pressurization pipe valve 19；Slip casting valve 23 is opened, grouting pump 24, slurry are started
Grouting serous fluid in liquid storage tank 25 enters Grouting Pipe 5 by grouting serous fluid delivery pipe 27, when grouting pressure reaches in Grouting Pipe 5
When 0.2MPa, grouting serous fluid breaks through slip casting valve 6, and grouting serous fluid flows into slip casting region 9, when 26 registration of grouting pressure table reaches
When 0.3MPa, stop slip casting, closes slip casting valve 23；Pressurization pipe valve 19, booster air pump 21, when inflation gauge 20 shows are opened again
When number reaches 1MPa, stop pressurization, closes pressurization pipe valve 19；When it is implemented, before pressurization, it is ensured that preceding air bag 1, center sleeve 11
It can be opened without breakage and normally with rear gasbag 2, pressurization pipe valve 19 is in the open state, gas drainage valve 18 and slip casting valve
23 are in close state, it is ensured that entire pipeline does not have gas leak phenomenon；Pre-assigned enough slip casting is provided in slurries storage tank 25
Slurries guarantee that grouting serous fluid keeps uniform before slip casting；Since center sleeve 11 is thicker than preceding air bag 1 and rear gasbag 2, for the first time
When being pressurized to 0.3MPa, preceding air bag 1 and rear gasbag 2 expand rapidly, block both ends, it is ensured that preceding air bag 1 and rear gasbag 2 and hole wall are tight
Closely connected conjunction guarantees sealing effect, and slurries are revealed when preventing slip casting, and center sleeve 11, which is in, at this time is full of but non-bloating state,
It is grouting serous fluid slot milling in slip casting region 9；When pressure reaches 0.3MPa, stop pressurization, starts slip casting, work as Grouting Pipe
When pressure reaches 0.2MPa in 5, grouting serous fluid breaks through slip casting valve 6 and flows into slip casting region 9, when pressure reaches in slip casting region 9
When 0.3MPa, stop slip casting, at this point, pressure and pressure phase in slip casting region 9 in preceding air bag 1, center sleeve 11 and rear gasbag 2
Deng；It is then turned on pressurization pipe valve 19 and air pump 21, stops pressurization when 20 pressure of inflation gauge reaches 1MPa, at this time center sleeve
11 are also at dilatancy state, and space is limited in hole, and extrusion pour slurry slurries enter slurry infiltration region 10, to gap region into
Row is effective to be blocked, and realizes preferable sealing effect, stores elastic potential in preceding air bag 1, center sleeve 11 and rear gasbag 2 at this time
Energy；Grouting serous fluid in slurries storage tank 25 uses flexible stronger Al (OH)3Colloid, the colloid is fire-retardant, stability is good,
Nontoxic, proportion is simple, low in cost, Al (OH)3Colloid is the colloidal dispersion with liquid property, be can enter in borehole fissure,
Expand diffusion zone, enhances leakproofness, be good sealing material.
Step 4: gas drainage: open gas drainage valve 18, starting gas drainage pump 14, the gas of extraction by watt
This delivery pipe 15 is transported to gas storage tank 16, and gas pressure table 17 shows gas pressure at extraction；During extraction, in hole
Gas bearing capacity is gradually reduced, and under the action of mine pressure, coal body 13 has new crack and formed, and crack is also gradually sudden and violent in hole
Dew, the elastic potential energy of preceding air bag 1, center sleeve 11 and rear gasbag 2 gradually discharges at this time, and volume expansion is slow by grouting serous fluid
Be pressed into the crack that is newly formed, when one section after reach new balance, realize active dynamic sealing；It is observed during extraction
The pressure that inflation gauge 20 is shown can be at any time to air bag in current air bag 1, center sleeve 11 and rear gasbag 2 when pressure reduction
Pressurization, realizes preferable sealing effect.
The above is only the preferred embodiment of the utility model, not imposes any restrictions to the utility model, all
According to any simple modification to the above embodiments of the utility model technical spirit, change and equivalent structural changes, still
Belong in the protection scope of technical solutions of the utility model.
Claims (7)
1. a kind of coal mine gas pre-draining borehole flexibility sealing of hole system, including being disposed side by side in gas pre-drainage borehole space (8)
Drainage tube (3), Grouting Pipe (5) and two forcing pipes (4), the gas pre-drainage borehole space (8) are with one end of gas drainage
Inner end, the other end are outer end, are disposed with preceding air bag (1), intermediate gas in the gas pre-drainage borehole space (8) from outside to inside
Capsule (11) and rear gasbag (2), the center sleeve (11) is made of symmetrically arranged upper air bag and lower gasbag one on the other, described
Drainage tube (3) passes through preceding air bag (1) and rear gasbag (2), and between the upper air bag and lower gasbag of the air bag that is clipped in the middle (11), and two
In the forcing pipe (4) wherein one sequentially pass through from outside to inside preceding air bag (1) and constitute center sleeve (11) upper air bag and
Penetrate rear gasbag (2)；Other one in two forcing pipes (4) sequentially passes through from outside to inside in preceding air bag (1) and composition
Between air bag (11) lower gasbag and penetrate rear gasbag (2)；Multiple first buckles (28) are provided on the upper air bag, it is multiple described
Upper air bag is fixedly connected on drainage tube (3), Grouting Pipe (5) and on the forcing pipe (4) of upper air bag by the first buckle (28), and
Upper air bag is divided into multiple sub- air bags (11-1)；The first buckle (28) with fixed upper air bag is provided on the lower gasbag
Lower gasbag is fixedly connected on drainage tube (3), note by identical multiple second buckles (29) in position, multiple second buckles (29)
Slurry manages (5) and is divided into multiple lower sub- air bags (11-2) on the forcing pipe (4) of lower gasbag, and by lower gasbag；Across upper gas
Portion on a piece forcing pipe (4) of capsule in multiple sub- air bags (11-1) and rear gasbag (2) in preceding air bag (1), upper air bag
Point it is provided with stomata, preceding air bag (1) is located on a forcing pipe (4) of lower gasbag, multiple lower sub- air bags in lower gasbag
Part in (11-2) and rear gasbag (2) is provided with stomata, and gas valve (7) are connected on the stomata；The Grouting Pipe
(5) preceding air bag (1) is passed through, and between the upper air bag and lower gasbag of the air bag that is clipped in the middle (11), is located at preceding air bag (1) and intermediate gas
Grouting Pipe (5) between capsule (11), between rear gasbag (2) and center sleeve (11) between two neighboring sub- air bag (11-1)
On be provided with grouting serous fluid outlet, the grouting serous fluid is connected with slip casting valve (6) in outlet；
Preceding air bag (1) both ends are provided with the buckle of the third for sealing preceding air bag (1) (30), and the third buckles (30)
Preceding air bag (1) both ends are fixedly connected on drainage tube (3), Grouting Pipe (5) and two forcing pipes (4)；The rear gasbag (2) is leaned on
Nearly center sleeve (11) one end is provided with the 4th buckle (31), and the 4th buckle (31) is by rear gasbag (2) close to center sleeve
(11) one end is fixedly connected on drainage tube (3) and two forcing pipes (4), and the rear gasbag (2) is far from center sleeve (11) one
End is provided with the 5th buckle (32), and rear gasbag (2) are fixedly connected by the 5th buckle (32) far from center sleeve (11) one end
On drainage tube (3).
2. a kind of coal mine gas pre-draining borehole flexibility sealing of hole system described in accordance with the claim 1, it is characterised in that: the slip casting
Valve (6) is check valve.
3. a kind of coal mine gas pre-draining borehole flexibility sealing of hole system described in accordance with the claim 1, it is characterised in that: the extraction
Pipe (3), Grouting Pipe (5) are fixedly connected with two forcing pipes (4).
4. a kind of coal mine gas pre-draining borehole flexibility sealing of hole system described in accordance with the claim 1, it is characterised in that: the extraction
Pipe (3) mash gas extraction gas end is provided with floral tube (12).
5. a kind of coal mine gas pre-draining borehole flexibility sealing of hole system described in accordance with the claim 1, it is characterised in that: the pressurization
Pipe (4) is connected with pressurizing device in gas pre-drainage borehole space (8) outer end, the pressurizing device include air shooter (22) and
Air pump (21), the forcing pipe (4) connect with air shooter (22) one end, air shooter (22) other end and air pump
(21) it connects, is connected with pressurization in turn from connection air pump (21) to connection forcing pipe (4) direction on the air shooter (22)
Pipe valve (19) and inflation gauge (20).
6. a kind of coal mine gas pre-draining borehole flexibility sealing of hole system described in accordance with the claim 1, it is characterised in that: the upper son
The diameter of air bag (11-1) and lower sub- air bag (11-2) is respectively less than the radius of gas pre-drainage borehole space (8).
7. according to a kind of coal mine gas pre-draining borehole flexibility sealing of hole system described in claim 1 or 6, it is characterised in that: described
Upper sub- air bag (11-1), lower sub- air bag (11-2), preceding air bag (1) and rear gasbag (2) are made of inflatable pipe, sub- air bag in composition
The wall thickness of the inflatable pipe of (11-1) and lower sub- air bag (11-2) is greater than the wall for constituting the inflatable pipe of preceding air bag (1) and rear gasbag (2)
It is thick.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821694248.2U CN208364089U (en) | 2018-10-18 | 2018-10-18 | A kind of coal mine gas pre-draining borehole flexibility sealing of hole system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821694248.2U CN208364089U (en) | 2018-10-18 | 2018-10-18 | A kind of coal mine gas pre-draining borehole flexibility sealing of hole system |
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| CN208364089U true CN208364089U (en) | 2019-01-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111271022A (en) * | 2020-01-20 | 2020-06-12 | 黑龙江工业学院 | Coal mine gas extraction drill hole compressed air sealing method and sealing device |
-
2018
- 2018-10-18 CN CN201821694248.2U patent/CN208364089U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111271022A (en) * | 2020-01-20 | 2020-06-12 | 黑龙江工业学院 | Coal mine gas extraction drill hole compressed air sealing method and sealing device |
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