CN108979531A - A kind of foam concrete grouting system and method for the prevention and treatment of mine collapse hole - Google Patents

A kind of foam concrete grouting system and method for the prevention and treatment of mine collapse hole Download PDF

Info

Publication number
CN108979531A
CN108979531A CN201811178761.0A CN201811178761A CN108979531A CN 108979531 A CN108979531 A CN 108979531A CN 201811178761 A CN201811178761 A CN 201811178761A CN 108979531 A CN108979531 A CN 108979531A
Authority
CN
China
Prior art keywords
bar
capsule
drilling machine
grouting
drilling
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.)
Pending
Application number
CN201811178761.0A
Other languages
Chinese (zh)
Inventor
刘超
张超
秦雷
凌伟
黄晓晟
杨铭扬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xian University of Science and Technology
Original Assignee
Xian University of Science and Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to CN2018108125658 priority Critical
Priority to CN201810812565 priority
Application filed by Xian University of Science and Technology filed Critical Xian University of Science and Technology
Publication of CN108979531A publication Critical patent/CN108979531A/en
Pending legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B3/00Rotary drilling
    • E21B3/02Surface drives for rotary drilling
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00Sealing or packing boreholes or wells
    • E21B33/10Sealing or packing boreholes or wells in the borehole
    • E21B33/13Methods or devices for cementing, for plugging holes, crevices, or the like
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00Special methods or apparatus for drilling
    • E21B7/02Drilling rigs characterized by means for land transport with their own drive, e.g. skid mounting or wheel mounting
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00Special methods or apparatus for drilling
    • E21B7/20Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F7/00Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose

Abstract

The invention discloses a kind of foam concrete grouting systems for the prevention and treatment of mine collapse hole, crawler type hydraulic drilling rig including adjustable inclination angle, watt level, the system further include set lever apparatus, inflation or water filling capsule apparatus, inflation or water filling and its monitoring and feedback device, to the grouting device of collapse hole position slip casting;Invention additionally discloses a kind of foam concrete grouting methods for the prevention and treatment of mine collapse hole, it include: after moving back bar, loop bar conveys again, exits outer bar, to sealing of hole after capsule inflation or water filling, the conveying of foam concrete slurries, the initial set of waiting foam concrete slurries.The present invention uses the foam concrete of chemical blowing process production, and good permeability, intensity is high, at low cost;Capsule is inflatable, and has good flexibility, can be used for the drilling of different pore size, different angle, different coals quality, therefore can be used for the mine of various geology, practical.

Description

A kind of foam concrete grouting system and method for the prevention and treatment of mine collapse hole
Technical field
The present invention relates to gas drainage field of engineering technology, especially a kind of foam concrete for the prevention and treatment of mine collapse hole Grouting system and method.
Background technique
The calorific value of coal bed gas is 2-5 times of general coal, the calorific value of 1 cubic metre of pure coal bed gas be equivalent to 1.13kg gasoline, 1.21kg standard coal, calorific value is suitable with natural gas, can be mixed with natural gas it is defeated mixed, and burn after it is very clean, hardly Any exhaust gas is generated, is first-class industry, chemical industry, power generation and resident living fuel.Coal bed gas air concentration reaches 5%-16% When, meeting open fire will explode, this is the root of Gas Explosion Accidents in Coal Mines.Coal bed gas is directly discharged in atmosphere, greenhouse effect It should be about 21 times of carbon dioxide, it is extremely strong to ecological environment destruction.If first exploiting coal bed methane, coal mine gas before coal mining Rate of explosion will reduce by 70% to 85%.The development and utilization of coal bed gas have --- and clear energy sources, generation commercial interest etc. are more at one stroke The effect of obtaining.
Currently, mash gas extraction most common method in China's is taken out using the split mining face coal-bed gas that drills is pre- in advance. Since coal mass strength is smaller than rock stratum, this coal bed drilling is mostly air or hydraulic slag discharging, and hole inner support pressure is very small, in addition It is influenced by factors such as crustal stress, coal seam gas-bearing capacity and coal mass strengths, weak seam gas drainage hole easily deforms very when creeping into To collapsing, causes to embrace and bore.In addition, the hole ambient stress quadratic distribution due to caused by recovery activity, will cause hole surrounding medium position Deformation is moved, adopts collapsing after further resulting in Completion of Drilling Hole.The channel for blocking Gas and flowing, has seriously affected gas Extraction efficiency strongly limits the process that gas pumping effect reaches standard, increases Gas Disaster risk when coal mining. Therefore, borehole stability Journal of Sex Research has a very important significance.
Therefore, the prevention and treatment of drilling collapse hole is always one of the great difficult problem that coal bed drilling needs to solve in the process.Under in drilling rod The method of casing has obtained during practical coal bed drilling as a kind of effective prevention and treatment soft seam drilling collapse hole technology Actual application is arrived, but its construction cost is big, complex process, is unfavorable for being widely popularized.And in actual application by In drilling collapse hole, screen casing hole is blocked, causes practical extracting result unsatisfactory.Therefore, a set of feasible collapse hole prevention and treatment is established Method can further improve gas drainage efficiency, significant to coal mine production safety.Currently, the spy for foam concrete Rope and application consider the effectiveness of its high-strength light, insulation mostly, study the problem of its gas permeability less, therefore, need It improves and steeps mixed concrete in the deficiency of this aspect.
Summary of the invention
The invention aims to solve the deficiencies in the prior art, a kind of bubble for the prevention and treatment of mine collapse hole is provided Foam concrete grouting system and method, structure is simple, and design rationally, utilizes " a two stifled notes " technology to block collapse hole section and drill, Then circulation of the exact position slip casting without influencing gas in non-collapse hole section is carried out on collapse hole section, has ensured gas to the full extent Extraction efficiency, and the foam concrete after laboratory proportion changes, greatly improve in terms of gas permeability, can be applied to not Coal mine under the conditions of, it is adaptable, it is low in cost, it is widely used.
In order to achieve the above objectives, the present invention is implemented according to following technical scheme:
A kind of foam concrete grouting system for the prevention and treatment of mine collapse hole, including adjustable inclination angle, watt level Crawler type hydraulic drilling rig, the hydraulic drill rig include fuselage, crawler belt, cushion cap, stand, motor, outer drilling rod and interior drilling rod;The system It further include set lever apparatus, inflation or water filling capsule apparatus, inflation or water filling and its monitoring and feedback device, to the slip casting of collapse hole position Grouting device;
The set lever apparatus includes the outer bar being threadedly coupled with outer drill rod end, with interior drill rod end is threadedly coupled and is nested with In the interior bar in outer bar, the front end of outer bar be equipped with can closed type drill bit, the front end of interior bar is screen casing, the installation of screen casing front end outer wall Have a hangnail, the hangnail can closed type drill bit open when for through can closed type drill bit;
The inflation or water filling capsule apparatus include two adjacent capsules being placed on screen casing;
The inflation or water filling and its monitoring and feedback device include the pump, defeated for inflating or filling the water into two capsules Supply gas body or water enters the tubule of two capsules and control gas and water pass in and out the valves of two capsules, and monitoring and feedback two The flowmeter and pressure gauge of capsule pressure, the tubule are axially fixed in the inner wall of interior bar upper end, and in two glue Capsule position is inscribed in two capsules and is equipped with air inlet or inlet opening, and the flow, meter pressure gauge are mounted on and are placed in mine drilling On outer tubule;
The grouting device to the slip casting of collapse hole position includes in the Grouting Pipe and two capsules of grouting pump and conveying slurries Between with screen casing in one section of explosive valve, interior screen casing outer wall is run through in Grouting Pipe front end, and explosive valve is mounted in Grouting Pipe front end, institute It states Grouting Pipe front end and is located at explosive valve one end, slip casting pipe end is connect with the grouting pump being placed in outside mine drilling.
Further, the outer bar, interior bar are formed by several, upper outer bar, an interior bar respectively with next outer bar, interior Bar is connected through a screw thread, and an interior bar of the front end is screen casing.
Further, check valve is equipped at the air inlet connecting with two capsules or inlet opening.
In addition, the present invention also provides a kind of foam concrete grouting method for the prevention and treatment of mine collapse hole, including it is following Step:
Step 1: loop bar conveys again after moving back bar: hydraulic drill rig punching, which retreats, bores, and hangnail is mounted on screen casing, then will Screen casing is threadedly connected on special drilling machine, installation can closed type three-wing bit in first outer bar, by first outer rod set Rear thread is connected on drilling machine outside screen casing, starts drilling machine, after loop bar deeply drills, is stopped drilling machine, is unloaded screen casing and first Root outer bar connects first capsule and screen casing, and second outer rod set is connected in first outer bar outside first capsule, then It is secondary that loop bar is connected on drilling machine, start drilling machine, after second loop bar deeply drills, stops drilling machine, by loop bar from drilling machine It unloads, connection is used for the Grouting Pipe of slip casting, rod set outside third root is connected to second outer bar outside slip casting section interior bar, by loop bar Be connected to drilling machine, start drilling machine, after third root loop bar deeply drill, stop drilling machine, unload loop bar, connect second capsule and 4th outer rod set is connected to third root outer bar by slip casting section interior bar outside second capsule, connects loop bar and drilling machine, and starting is bored Machine stops drilling machine, unloads loop bar after the 4th loop bar deeply drills, and first common interior bar is installed after second capsule, First outer bar is installed, loop bar and drilling machine are connected, starts drilling machine;Above step is repeated, until loop bar is deep into mine drilling Collapse hole fragment position, is again started up drilling machine, allows hangnail to pass through three-wing bit and penetrates in coal seam, slightly recession drilling rod, hangnail is allowed to fix In coal wall;
Step 2: exiting outer bar: outer bar being unloaded from drilling machine, interior bar is unloaded from drilling machine, then outer bar is connected to Drilling machine starts drilling machine, reversely rotates, and after last root outer bar exits drilling, stops drilling machine, last root outer bar is unloaded underlying In tunnel ground, drilling machine and second from the bottom outer bar are connected, is again started up drilling machine reverse rotation;Above step is repeated, until moving back Out until all outer bars;
Step 3: inflating or filling the water to capsule: according to the concrete condition of underground, capsule is inflatable or fills the water, and first will Snorkel or water injection pipe and the tracheae or water pipe of underground connect, and open end valve, and gas or water flow is allowed to pass through snorkel or note Water pipe is transported in capsule, is calculated the volume for being filled with required gas and water flow in capsule in advance, is observed by gas flowmeter, etc. The gas and water flow volume inputted in capsule is when precalculated volume, rotating valve, reduces the rate of gas transmission or water filling, observes gas The variation of pressure table illustrates that the expansion of capsule meets with obstruction, that is, is expanded into borehole wall until barometric pressure becomes larger suddenly Position, close the valve of end, prevent and treat gas and water reflux, stop conveying gas or water flow;
Step 4: the conveying of foam concrete slurries: prepared by lime, gypsum, aluminium powder, oxygen in mining blender The foam concrete slurries for changing calcium, accelerator composition, mining blender is connect with grouting pump, then grouting pump is soft by variable diameter Pipe is connect with Grouting Pipe, starts grouting pump, the foam concrete slurries that injection prepares in Grouting Pipe, according to liquid level in blender Down position judge grouting amount number, wait after reaching 0.2 cube of estimated grouting amount, stop slip casting;
Step 5: sealing of hole after the initial set of waiting foam concrete slurries: standing half an hour, wait until foam concrete slurries Initial set is completed, and then drainage tube is connected with hole sealing tube, under the double action of methane pressure gradient and extraction negative pressure, collapse hole section Methane gas later passes through two ways by extraction, first is that by the gap of foam concrete by extraction, second is that passing through screen casing Again by interior bar by extraction.
Compared with prior art, the invention has the following advantages that
1, structure of the invention is simple, and design rationally, is realized and easy to use and operate.
2, the present invention is injecting foam concrete by pinpointing to drilling collapse hole section, to not influence other section of gas just Often circulation has ensured the circulation of gas in drilling to the full extent, has reduced the decaying of methane pressure gradient.
3, the present invention proposes the scheme of new prevention and treatment drilling collapse hole on the basis of drilling and sealing in mine, improves existing Drilling collapse hole prevention and treatment technique, improve the extraction efficiency of the pre- extraction of collapse hole drilling gas.
4, the present invention uses the foam concrete of autonomous Design completely, which uses chemical blowing process, relatively For traditional physical blowing method to be foamed using foaming machine, cost is greatly saved, improves economic benefit, and compare In traditional foaming machine mostly use electric power foam and cannot very well be suitable for underground condition, while foaming machine itself due to figure, Weight is larger, is unfavorable for for transporting up and down, chemical blowing process simple possible is easy to carry, and with with matching, component is adjustable, greatly Cost is saved greatly, improves economic benefit, the simplicity for increasing the convenience of transport and using.
In conclusion the configuration of the present invention is simple, design are rationally, the technique and stream of foaming have been simplified by chemical blowing process Journey is suitable for engineering site, and easy to use and operate, practical, using effect is good, convenient for promoting the use of.
Detailed description of the invention
Fig. 1 is the schematic diagram for carrying out slip casting after capsule of the present invention closure drills to Grouting Pipe.
Fig. 2 is the drilling machine schematic diagram of present invention conveying loop bar.
Fig. 3 is the relation schematic diagram of the inside and outside bar of the present invention and tracheae and Grouting Pipe.
Fig. 4 is flow chart of the method for the present invention.
Specific embodiment
The invention will be further described combined with specific embodiments below, in the illustrative examples and explanation of the invention For explaining the present invention, but it is not as a limitation of the invention.
As shown in Figure 1-Figure 3, a kind of foam concrete grouting system for the prevention and treatment of mine collapse hole of the present embodiment, including Adjustable inclination angle, watt level crawler type hydraulic drilling rig 19, the hydraulic drill rig 19 include fuselage 13, crawler belt 12, cushion cap 18, stand 17, motor 16, outer drilling rod 15 and interior drilling rod 14;The system further includes set lever apparatus 24, inflation or water filling capsule dress Set, inflate or fill the water and its monitor and feedback device, to the grouting device of collapse hole position slip casting;
The set lever apparatus 24 includes that the outer bar 20 connecting with outer 15 end thread of drilling rod and interior 14 end thread of drilling rod connect The interior bar 21 in outer bar 20 is connect and is placed on, interior bar 21 is antistatic, fire-retardant pvc pipe, and the front end of outer bar 20, which is equipped with, to be closed Box-like drill bit 10, in addition, outer bar 20, interior bar 21 are formed by several, a upper outer bar 20, interior bar 21 are outer with next respectively Bar 20, interior bar 21 are connected through a screw thread, and an interior bar 21 of the front end is screen casing, and screen casing front end outer wall is equipped with hangnail 11, the hangnail 11 can closed type three-wing bit 10 open when for through can closed type drill bit 10, when hangnail 11 squeezes into mine Rear distraction in well drill hole inner wall is fixed and successively exits outer bar 20 after interior bar 21,;
The inflation or water filling capsule apparatus include two adjacent first be placed on screen casing capsules 6 and second glue Capsule 8;
The inflation or water filling and its monitoring and feedback device include being used into first capsule 6 and second capsule 8 The pump of inflation or water filling, conveying gas or water enter the tubule 22 of first capsule 6 and second capsule 8 and control gas and water The valve of first capsule 6 and second capsule 8, and the flowmeter and pressure gauge of monitoring and feedback capsule pressure are passed in and out, The tubule 22 is axially fixed in the inner wall of 21 upper end of interior bar, and inscribed in first capsule 6 and second 8 position of capsule In first capsule 6 and second capsule 8 and it is equipped with air inlet or inlet opening 221, the flow, meter pressure gauge are mounted on and are placed in On tubule 22 outside mine drilling;
The grouting device to the slip casting of collapse hole position includes the Grouting Pipe 23 and first glue of grouting pump and conveying slurries Screen casing 26 in one section among capsule 6 and second capsule 8 with explosive valve, Grouting Pipe 23 are axially fixed in 21 lower end of interior bar Interior screen casing outer wall is run through in inner wall, 23 front end of Grouting Pipe, and explosive valve 25 is mounted in 23 front end of Grouting Pipe, 23 front end of Grouting Pipe Positioned at explosive valve one end, 23 end of Grouting Pipe is connect with the grouting pump being placed in outside mine drilling.When grouting pressure reaches explosive valve When the explosion limit, explosive valve pops, and slurries flow into the drilling of collapse hole section 7, and after solidification, expansion jacks up collapse hole section 7 and drills.
In actual use, first can closed type three-wing bit 10 be installed in first outer bar 20, then by the hangnail of closure 11 are installed on screen casing, then fill in the screen casing for being mounted with hangnail 11 in outer bar 20.
It is equipped at the air inlet being connect in the present embodiment with first capsule 6 and second capsule 8 or inlet opening 221 unidirectional Valve 9, after gas or water flow are transported in first capsule 6 and second capsule 8 by snorkel or water injection pipe, at this time because The reason of check valve 9, can prevent gas or water flow from flowing back.
A kind of above-mentioned foam concrete grouting system for the prevention and treatment of mine collapse hole, the foam concrete are by real Test the porous foam concrete with fine air permeability that room proportion is adjusted.
In actual use, since the air pressure of underground, temperature etc. and laboratory are not fully identical, and these all can be to foam The final gas permeability of concrete and intensity have some impact on, and can carry out the test of micro proportion at the scene, after being adjusted to best, It can carry out the proportion of practical slip casting.
Above-mentioned a kind of foam concrete grouting system for the prevention and treatment of mine collapse hole, according to the change of scene drilling coal output Change the position for determining collapse hole, carries out secondary-confirmation during conveying Grouting Pipe 23 and entering drilling.
In actual use, the coal dust that should be drilled out when a distance is drilled with container access, and accurate weighing is carried out, claim Interval same distance when amount, using every drilling rod or every two drilling rod as boundary, time when connecing coal dust every time should keep equal, to the greatest extent may be used Can influence of the reductions other factors to unit time coal output, go out coal dust amount if encountering the unit time when piercing for the second time and dash forward So increased place with it is significantly different when piercing for the first time, should be subject to the case where encountering when piercing for the second time.
When carrying out slip casting using the foam concrete grouting system for the prevention and treatment of mine collapse hole of examples detailed above, such as his 4 institutes Show, the specific steps are as follows:
Step 1: loop bar conveys again after moving back bar: the punching of hydraulic drill rig 19, which retreats, bores, and hangnail 11 is mounted on screen casing, Screen casing is threadedly connected on special drilling machine 19 again, installation can closed type three-wing bit 10 in first outer bar 20, by One 20 sets of outer bar outside screen casing rear thread be connected on drilling machine 19, start drilling machine 19, wait cover lever apparatus 24 deeply drilling after, stop Screen casing and first outer bar 20 are unloaded in only drilling machine 19, connect first capsule 6 and screen casing, by second 20 sets of outer bar first It is connected in first outer bar 20 outside a capsule 6, set lever apparatus 24 is connected on drilling machine 19 again, starts drilling machine 19, to the Two set lever apparatus 24 deeply after drilling, stop drilling machine 19, set lever apparatus 24 are unloaded from drilling machine 19, connection is for slip casting Grouting Pipe 23 is connected to second outer bar 20 for 20 sets of third root outer bar outside slip casting section interior bar 21, and set lever apparatus 24 is connected In drilling machine 19, start drilling machine 19, after third root set lever apparatus 24 deeply drilling, stops drilling machine 19, unload set lever apparatus 24, even Second capsule 8 and 5 interior bar 21 of slip casting section are connect, is connected to third root outer bar outside second capsule 8 for the 4th 20 sets of outer bar 20, connector sleeve lever apparatus 24 and drilling machine 19, starting drilling machine 19 stop drilling machine 19 after the 4th set lever apparatus 24 deeply drilling, Set lever apparatus 24 is unloaded, first common interior bar 21 is installed after second capsule 8, first outer bar 20 is installed, connects loop bar Device 24 and drilling machine 19 start drilling machine 19;Above step is repeated, until set lever apparatus 24 is deep into the collapse hole section 7 of mine drilling Position is again started up drilling machine 19, allows hangnail 11 to pass through three-wing bit 10 and penetrates in coal seam, slightly recession drilling rod, makes hangnail 11 solid Due in coal wall;
It should be noted that drilling due to being beaten with mining drilling machine on coal wall, former casings can be straight It connects and manually fills in drilling, when encountering obvious resistance when until filling in, then the machine of drilling is used to be pierced.
Step 2: exiting outer bar: outer bar 20 being unloaded from drilling machine 19, interior bar 21 is unloaded from drilling machine 19, then will be outer Bar 20 is connected to drilling machine 19, starts drilling machine 19, reversely rotates, and after last root outer bar 20 exits drilling, stops drilling machine 19, will Last root outer bar 20, which unloads, is placed in tunnel ground, and it is anti-to be again started up drilling machine 19 for connection drilling machine 19 and second from the bottom outer bar 20 To rotation;Above step is repeated, until exiting all outer bar 19;
The vibration generated when in actual use, due to moving back brill may make interior bar occur moving back in the borehole distance after boring with The case where initial range deviates, the occurrence of in order to avoid this, following two method, which can be used, and reduce influences: 1, drilling When keep drilling rod distance slightly remoter than preset distance;2, brill is slowly moved back using small-power when moving back brill, smoothly exits brill as far as possible Bar.
Step 3: inflating or filling the water to capsule: according to the concrete condition of underground, first capsule 6 and second capsule 8 can Snorkel or water injection pipe 4, connect by inflation or water filling with the tracheae of underground or water pipe 4 first, and opening end valve allows gas Or water flow is transported in first capsule 6 and second capsule 8 by snorkel or water injection pipe 4, calculates be filled with first in advance The volume of required gas and water flow, is observed by gas flowmeter in capsule 6 and second capsule 8, waits first capsule 6 and The gas and water flow volume inputted in two capsules 8 is when precalculated volume, rotating valve, reduces the rate of gas transmission or water filling, Barometric variation is observed, until barometric pressure becomes larger suddenly, illustrates the swollen of first capsule 6 and second capsule 8 It is swollen to meet with obstruction, that is, it is expanded into the position of borehole wall, closes the valve of end, gas and water reflux is prevented and treated, stops conveying Gas or water flow;
In actual use, inflation or water filling be can be used according to the actual conditions of underground, when inflation, due to the pressure of coal wall, It should continue to pour a certain amount of gas after pressure gauge mutation, so that capsule can be very good to squeeze coal wall, play and prop up coal wall With the effect for blocking drilling, when water filling, since the diameter of tracheae is too small, the bonding strength between tracheae is limited, because to the greatest extent may be used The reduction water flow of energy reduces water flow to the pressure of tracheae.
Step 4: the conveying of foam concrete slurries: prepared by lime, gypsum, aluminium powder, oxygen in mining blender The foam concrete slurries for changing calcium, accelerator composition, mining blender is connect with grouting pump, then grouting pump is soft by variable diameter Pipe is connect with Grouting Pipe 23, starts grouting pump, the foam concrete slurries that injection prepares in Grouting Pipe 23, according in blender Liquid level down position judge grouting amount number, wait after reaching 0.2 cube of estimated grouting amount, stop slip casting;
In actual use, being commonly used due to blender is difficult to accomplish to clean out, and can use biggish polybag or oil Cloth place mat carries out the proportion of concrete slurry again in grouting pump, prevent concrete slurry match during, concrete slurry with Outmoded concrete solid on blender machine wall reacts to influence the performance of final foam concrete.For coal wall Irregular deformation, capsule can not completely block drilling between gap, therefore when injecting foam concrete slurries than Practical calculation amount is injected a certain amount of more.
Step 5: sealing of hole after the initial set of waiting foam concrete slurries: standing half an hour, wait until foam concrete slurries Initial set is completed, and then drainage tube 2 is connected with hole sealing tube 1, under the double action of methane pressure gradient and extraction negative pressure, collapse hole Methane gas after section 7 passes through two ways by extraction, first is that by the gap of foam concrete by extraction, second is that passing through sieve Pipe is again by interior bar 21 by extraction.
The limitation that technical solution of the present invention is not limited to the above specific embodiments, it is all to do according to the technique and scheme of the present invention Technology deformation out, falls within the scope of protection of the present invention.

Claims (4)

1. a kind of foam concrete grouting system for the prevention and treatment of mine collapse hole, the shoe including adjustable inclination angle, watt level Belt type hydraulic drilling machine (19), the hydraulic drill rig (19) include fuselage (13), crawler belt (12), cushion cap (18), stand (17), motor (16), outer drilling rod (15) and interior drilling rod (14);It is characterized by: the system further includes set lever apparatus (24), inflation or water filling glue Bag apparatus, inflation or water filling and its monitoring and feedback device, the grouting device (3) to the slip casting of collapse hole position;
The set lever apparatus (24) includes the outer bar (20) connecting with outer drilling rod (15) end thread and interior drilling rod (14) end spiral shell Line connects and the interior bar (21) that is placed in outer bar (20), the front end of outer bar (20) be equipped with can closed type drill bit (10), interior bar (21) front end is screen casing, and screen casing front end outer wall is equipped with hangnail (11), the hangnail (11) can closed type drill bit (10) beat Being used to run through when opening can closed type drill bit (10);
The inflation or water filling capsule apparatus include two adjacent capsules (6,8) being placed on screen casing;
The inflation or water filling and its monitoring and feedback device include being used to the pump of inflation or water filling, conveying into capsule (6,8) Gas or water enter the tubule (22) of capsule (6,8) and the valve of control gas and water disengaging capsule (6,8), and monitoring and feedback The flowmeter and pressure gauge of capsule pressure, the tubule (22) are axially fixed in the inner wall of interior bar (21) upper end, and Air inlet or inlet opening (221), the flow, meter pressure gauge installation are inscribed in capsule (6,8) and are equipped in capsule (6,8) position On being placed in the tubule outside mine drilling (22);
The grouting device (3) to the slip casting of collapse hole position includes the Grouting Pipe (23) and two glue of grouting pump and conveying slurries Screen casing (26) in one section among capsule (6,8) with explosive valve (25), Grouting Pipe (23) are axially fixed in interior bar (21) lower end Inner wall, Grouting Pipe (23) front end runs through interior screen casing outer wall, and explosive valve (25) is mounted in Grouting Pipe (23) front end, Grouting Pipe (23) end is connect with the grouting pump being placed in outside mine drilling.
2. the foam concrete grouting system according to claim 1 for the prevention and treatment of mine collapse hole, it is characterised in that: described Outer bar (20), interior bar (21) are formed by several, a upper outer bar (20), interior bar (21) respectively with next outer bar (20), Interior bar (21) is connected through a screw thread, and an interior bar (21) of the front end is screen casing.
3. the foam concrete grouting system according to claim 1 for the prevention and treatment of mine collapse hole, it is characterised in that: with two Check valve (9) are equipped at the air inlet of a capsule (6,8) connection or inlet opening (221).
4. a kind of foam concrete grouting method for the prevention and treatment of mine collapse hole, which is characterized in that any using claim 1-3 The foam concrete grouting system for the prevention and treatment of mine collapse hole, the specific steps are as follows:
Step 1: loop bar conveys again after moving back bar: hydraulic drill rig (19) punching, which retreats, bores, and hangnail (11) is mounted on screen casing, Screen casing is threadedly connected on special drilling machine (19) again, installation can closed type three-wing bit (10) in first outer bar (20) On, first outer bar (20) is covered into the rear thread outside screen casing and is connected on drilling machine (19), is started drilling machine (19), it is deep to loop bar (24) After entering drilling, stops drilling machine (19), unload screen casing and first outer bar (20), first capsule (6) and screen casing are connected, by second Root outer bar (20) is covered to be connected on first outer bar (20) outside first capsule (6), and loop bar (24) is connected to drilling machine again (19) on, start drilling machine (19), after second loop bar (24) deeply drilling, stop drilling machine (19), by loop bar (24) from drilling machine (19) it is unloaded on, connection is used for the Grouting Pipe (23) of slip casting, and third root outer bar (20) is covered and is connected outside in slip casting section interior bar (21) In second outer bar (20), loop bar (24) is connected to drilling machine (19), is started drilling machine (19), is deeply bored to third root loop bar (24) Kong Hou stops drilling machine (19), unloads loop bar (24), connect second capsule (8) and slip casting section (5) interior bar (21), by the 4th Outer bar (20) is covered is connected to third root outer bar (20) outside second capsule (8), and connection loop bar (24) and drilling machine (19), starting are bored Machine (19) stops drilling machine (19) after the 4th loop bar (24) deeply drilling, loop bar (24) is unloaded, after second capsule (8) First common interior bar (21) is installed, first outer bar (20) is installed, connects loop bar (24) and drilling machine (19), starts drilling machine (19) ... above step is repeated, until loop bar (24) is deep into collapse hole section (7) position of mine drilling, is again started up drilling machine (19), it allows hangnail (11) to pass through three-wing bit (10) to penetrate in coal seam, slightly recession drilling rod, hangnail (11) is allowed to be fixed on coal wall In;
Step 2: exiting outer bar: outer bar (20) is unloaded from drilling machine (19), interior bar (21) is unloaded from drilling machine (19), then Outer bar (20) is connected to drilling machine (19), is started drilling machine (19), is reversely rotated, after last root outer bar (20) exits drilling, Stop drilling machine (19), last root outer bar (20) is unloaded and is placed in tunnel ground, connection drilling machine (19) and second from the bottom outer bar (20), it is again started up drilling machine (19) reverse rotation;Above step is repeated, until exiting all outer bars (19);
Step 3: inflating or filling the water to capsule: according to the concrete condition of underground, capsule (6,8) is inflatable or fills the water, and first will Snorkel or water injection pipe (4) are connect with the tracheae of underground or water pipe (4), open end valve, allow gas or water flow by supplying gas Pipe or water injection pipe (4) are transported in capsule (6,8), calculate the volume for being filled with required gas and water flow in capsule (6,8) in advance, are led to Gas flowmeter observation is crossed, waits the gas inputted in capsules (6,8) and water flow volume when precalculated volume, rotating valve subtracts The rate of small gas transmission or water filling observes barometric variation, until barometric pressure becomes larger suddenly, illustrates capsule (6,8) Expansion meet with obstruction, that is, be expanded into the position of borehole wall, close the valve of end, prevent and treat gas and water reflux, stop Convey gas or water flow;
Step 4: the conveying of foam concrete slurries: prepared by lime, gypsum, aluminium powder, oxidation in mining blender The foam concrete slurries of calcium, accelerator composition, mining blender is connect with grouting pump, then grouting pump is passed through variable diameter hose It is connect with Grouting Pipe (23), starts grouting pump, the foam concrete slurries that injection prepares in Grouting Pipe (23), according to blender Middle liquid level down position judge grouting amount number, wait after reaching 0.2 cube of estimated grouting amount, stop slip casting;
Step 5: sealing of hole after the initial set of waiting foam concrete slurries: half an hour is stood, until the initial set of foam concrete slurries It completes, then drainage tube (2) is connected with hole sealing tube (1), under the double action of methane pressure gradient and extraction negative pressure, collapse hole Methane gas after section (7) passes through two ways by extraction, first is that by the gap of foam concrete by extraction, second is that passing through Screen casing passes through interior bar (21) by extraction again.
CN201811178761.0A 2018-07-23 2018-10-10 A kind of foam concrete grouting system and method for the prevention and treatment of mine collapse hole Pending CN108979531A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2018108125658 2018-07-23
CN201810812565 2018-07-23

Publications (1)

Publication Number Publication Date
CN108979531A true CN108979531A (en) 2018-12-11

Family

ID=64543433

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811178761.0A Pending CN108979531A (en) 2018-07-23 2018-10-10 A kind of foam concrete grouting system and method for the prevention and treatment of mine collapse hole

Country Status (1)

Country Link
CN (1) CN108979531A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110953017A (en) * 2020-01-14 2020-04-03 中国矿业大学(北京) Device and method for preventing gas extraction borehole from collapsing
CN111119727A (en) * 2019-12-16 2020-05-08 江苏省地质矿产局第三地质大队 Multifunctional drilling machine suitable for sludge stratum and construction method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111119727A (en) * 2019-12-16 2020-05-08 江苏省地质矿产局第三地质大队 Multifunctional drilling machine suitable for sludge stratum and construction method thereof
CN111119727B (en) * 2019-12-16 2021-06-04 江苏省地质矿产局第三地质大队 Multifunctional drilling machine suitable for sludge stratum and construction method thereof
CN110953017A (en) * 2020-01-14 2020-04-03 中国矿业大学(北京) Device and method for preventing gas extraction borehole from collapsing

Similar Documents

Publication Publication Date Title
CN105332684B (en) A kind of water under high pressure is quick-fried and CO2The coal bed gas displacement extraction technique that pressure break is combined
RU2616635C1 (en) Method of improved combustible gas recovery using underground two-phase gas-liquid variable based on phases of unworked coal fracturing in coal mine
CN104632174A (en) Coal seam liquid carbon dioxide fracturing device and method
US4305464A (en) Method for recovering methane from coal seams
CN105067781B (en) Foam flooding evaluation device and evaluation method thereof
CN108979531A (en) A kind of foam concrete grouting system and method for the prevention and treatment of mine collapse hole
CN106285681B (en) A kind of hard coal seam top plate fracturing device and method
CN102942006B (en) The method of sequestration of carbon dioxide
CN102418549B (en) Technical method for extracting coal bed methane from constructed coal development area
CN104790916B (en) Method for removing gas well accumulated liquid by means of oil jacket pressure balancing method
CN105114030B (en) A kind of non-condensable constant pressure slurries method for sealing of mash gas pumping drilling
CN102720473A (en) Method for exploiting coal bed gas
CN104533452B (en) A kind of underground coal mine crushes coal body stagewise grouting strengthening method
CN109578059B (en) Underground coal bed gas extraction method and liquid nitrogen flowing frost cracking device used by same
CN208885180U (en) A kind of foam concrete grouting system for the prevention and treatment of mine collapse hole
CN110821448A (en) Exploitation method and exploitation device for marine natural gas hydrate
CN102200002A (en) method and device for sealing upward hole at high pressure by sections
CN210269442U (en) Triaxial coal petrography multi-field multiphase coupling fracturing experimental apparatus
CN111456721A (en) Device and method for measuring gas pressure of multistage air bag rapid hole sealing
CN207348834U (en) One kind extracts and the compound gas production system of foaming water discharge
CN203271733U (en) Testing device used for evaluating stability of well wall in gas drilling process
RU2268985C2 (en) Plant for well drilling and well face cleaning with foam
CN110107264A (en) A kind of gaslift suitable for gas well Life cycle water pumping gas production
US20120199348A1 (en) Plugging a Mined-Through Well
CN108756883A (en) A kind of coal mine tight roof slip casting fracturing process and system

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