CN111056804A - Manufacturing method and construction method of underground thin gunning material of coal mine and pneumatic guniting device - Google Patents
Manufacturing method and construction method of underground thin gunning material of coal mine and pneumatic guniting device Download PDFInfo
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- 238000010276 construction Methods 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 238000005507 spraying Methods 0.000 claims abstract description 104
- 238000003756 stirring Methods 0.000 claims abstract description 83
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
A manufacturing method and a construction method of a thin gunning material under a coal mine and a pneumatic guniting device relate to the technical field of coal mine underground production. The spraying device includes: the left stirring barrel and the right stirring barrel work alternately; the inlet of the pneumatic patching machine is connected with the bottoms of the left stirring barrel and the right stirring barrel through a tee joint, and the outlet of the pneumatic patching machine is connected with a high-pressure pipe and a spray gun. The invention has the beneficial effects that: the defects of low construction speed, poor labor environment, high material consumption, high auxiliary transportation capacity, multiple potential safety hazards and the like in the existing concrete spraying technology are overcome. Thin material spraying combines novel whitewashing technique and pneumatic whitewashing device, has formed the construction high efficiency, ensures safety, has improved the speed and the quality of whitewashing, has improved operational environment, the cost is reduced simultaneously.
Description
Technical Field
The invention relates to the technical field of underground production of coal mines, in particular to a technology for manufacturing and constructing underground roadway thin spraying materials, and further relates to a manufacturing method and a construction method of a mine spraying material for underground sealing reinforcement, deep well heat insulation, air isolation, weathering prevention and corrosion prevention.
Background
The anchor net support is a great progress of the coal mine support technology innovation, and plays an important role in improving single advance and reducing the support cost. However, with the increase of the service time of the roadway, under the action of deformation and expansion of the roadway, the stress of the anchor rod is gradually increased, and under the special condition of underground moisture, the rock stratum on the surface of the roadway is gradually weathered, and the strength of the surrounding rock is gradually reduced. Under the action of the anchor rod, the weathered surrounding rock is extremely easy to crush by the anchor rod tray, and once the surrounding rock below the tray is damaged, the action force of the anchor rod is reduced or even completely fails. More seriously, under the underground humid environment, the anchor rod, the tray and the metal net are seriously corroded, and the corrosion of metal supporting materials such as the anchor net and the like enables the anchor rod support to be easily loosened and damaged by pulling, so that the prestress of the anchor rod is gradually lost, the supporting effect is poor, and the stability of a roadway is seriously influenced. Therefore, in order to ensure the safety of mine production and prolong the service life of the roadway, remedial measures for preventing surrounding rock efflorescence and preventing metal support from rusting must be taken for the constructed roadway, and the newly excavated roadway needs to be sealed in time. At present, the common sprayed concrete or mortar is mostly adopted to seal the roadway, so that the problems of surrounding rock weathering and anchor rod metal mesh corrosion are solved. However, with the acceleration of coal mining speed, the method for sealing the surrounding rock by adopting common dry-sprayed concrete or mortar has more and more obvious defects: firstly, the construction process is complex, the labor intensity of workers is high, the injection speed is low, and particularly, for machine-driven anchor net tunnels, the injection concrete is adopted for sealing, and the injection construction speed is far from the pace of mechanical flower tunneling speed; secondly, the sprayed concrete has high rebound rate and high cost; thirdly, the dust concentration is high, and the environment of a construction site is poor; fourthly, the function of the sprayed concrete on improving the supporting strength of the roadway is not obvious, and the safety is influenced by the fact that the sprayed concrete is easy to peel off and fall off when the sprayed concrete is mixed in the roadway influenced by dynamic pressure. The fact proves that: the anchor net support is the main body of the roadway support, and the roadway can ensure the continuous stability as long as the long-term effectiveness of the anchor bolt support effect can be ensured. In the exposed roadway where the anchor net support is completed and concrete is not sprayed, the phenomena of metal net corrosion and surrounding rock weathering can occur due to the fact that underground air is moist and the support time is not long after tunneling. The metal mesh or anchor rod fracture appears in some severely rusted metal mesh and weathered loose surrounding rock, which seriously affects the normal production of the mine and also poses serious threat to the safety of the mine.
In order to overcome the defects, a manufacturing method and a construction method of underground thin gunning materials of a coal mine and a pneumatic gunning device are developed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a manufacturing method and a construction method of a thin gunning material under a coal mine and a pneumatic gunning device, which can effectively solve the defects of low construction speed, poor labor environment, large material consumption, large auxiliary transportation amount, multiple potential safety hazards and the like in the existing concrete spraying technology.
The purpose of the invention is realized by the following technical scheme:
the method for manufacturing the underground thin spraying material of the coal mine is characterized by comprising the following steps: the thin spraying material for the underground coal mine is prepared from inorganic filler, high-standard white cement, polymer powder, quartz powder, titanium dioxide, redispersible latex powder, calcium sulphoaluminate and other auxiliaries according to a certain proportion; the inorganic filler, the high-grade white cement, the polymer powder, the quartz powder, the titanium dioxide, the redispersible latex powder, the calcium sulphoaluminate and other auxiliary agents are as follows by weight percent: 36-44:18-22:13-17:8-12: 4-6: 4-6: 2-3: 2-3; when in preparation, the raw materials are uniformly mixed, packaged and stored.
Further:
the inorganic filler, the high-grade white cement, the polymer powder, the quartz powder, the titanium dioxide, the redispersible latex powder, the calcium sulphoaluminate and other auxiliary agents are as follows by weight percent: 38-42:19-21:14-16:9-11: 4.5-5.5: 4.5-5.5: 2.3-2.7:2.3-2.7.
The inorganic filler, the high-grade white cement, the polymer powder, the quartz powder, the titanium dioxide, the redispersible latex powder, the calcium sulphoaluminate and other auxiliary agents are as follows by weight percent: 40:20:15:10: 5:5: 2.5:2.5.
The inorganic filler is an inert powder material, and further comprises the following steps: the inorganic filler is calcium powder and/or stone powder; if the calcium powder and the stone powder are selected as the inorganic filler, the weight ratio of the calcium powder to the stone powder is as follows: stone powder = 1.8-2.2: 1, the preferred proportion is calcium powder: stone powder = 2: 1.
the high-grade white cement is marked by 42.5 and is an inorganic cementing material.
The other auxiliary agents comprise defoaming agents, water repellents and cellulose ether; when the other auxiliary agents are defoaming agents, water repellents and cellulose ether, the weight ratio is as follows: defoaming agent: water repellent: cellulose ether 42-46: 20-24: 31-35, preferably in weight ratio: 44:22: 33.
the other auxiliary agents also comprise pigments, wherein the pigments are mainly iron red or iron green, and the color of the thin spray material can be changed after the pigments are added, so that the thin spray material is used for roadway beautification. When the other auxiliary agents are defoaming agents, water repellents, cellulose ether and pigments, the weight ratio is as follows: defoaming agent: water repellent: cellulose ether: 38-42: 18-22: 28-32: 8-12, preferably the weight ratio is: 40:20: 30: 10.
the invention also discloses a construction method of the thin spray material.
The thin spraying construction method for the underground coal mine is characterized by comprising the following steps: mixing the coal mine underground thin spraying material and water according to the mass ratio of 2:1, spraying the mixture by a coal mine underground thin material spraying pneumatic guniting device, wherein the spraying thickness is 4-5 mm, and the spraying speed is 5-20 m/min.
The invention also provides the coal mine underground thin-spraying pneumatic slurry spraying device which is simple in structure, reliable in work, convenient to move, free of power supply, low in equipment noise during normal work, light in weight and free of dust emission and is suitable for the thin spraying.
The pneumatic slurry spraying device for the thin spraying material under the coal mine comprises a base, a pneumatic slurry sprayer, a stirring barrel, a pneumatic stirrer, a high-pressure pipe and a spray gun, and is characterized in that: the base is provided with a pneumatic pulp sprayer, a stirring barrel and a pneumatic stirrer, the stirring barrel is divided into a left stirring barrel and a right stirring barrel, the stirring barrel is internally provided with the pneumatic stirrer, namely the left pneumatic stirrer and the right pneumatic stirrer, and the left stirring barrel and the right stirring barrel work alternately; the inlet of the pneumatic patching machine is connected with the bottoms of the left and right stirring barrels through a tee joint, the bottom of the left stirring barrel is provided with a left valve, the bottom of the stirring barrel is provided with a right valve, the outlet of the pneumatic patching machine is connected with a high-pressure pipe, and the tail end of the high-pressure pipe is provided with a spray gun.
Further:
the left stirring barrel and the right stirring barrel work alternately, namely when the left stirring barrel is uniformly stirred and spraying is normally carried out, water and thin spraying materials are added into the right stirring barrel in proportion for stirring; when the thin spraying material in the left stirring barrel is sprayed, closing the left valve and opening the right valve to start spraying the thin spraying material which is just stirred uniformly in the right stirring barrel, and simultaneously adding water and the thin spraying material into the left stirring barrel in proportion for stirring; and when the thin spraying material in the right stirring barrel is sprayed, closing the right valve and opening the left valve to spray the thin spraying material which is just stirred uniformly in the left stirring barrel.
The spray gun and the pneumatic patching machine are connected by a high-pressure pipe, and when long-distance spraying is needed, an extension bar is arranged on the high-pressure pipe.
Further:
the left stirring barrel and the right stirring barrel are arranged, so that left and right alternate work is realized, the operation is repeated, a large amount of working time is saved, the spraying efficiency is improved, and the cost is saved.
The pneumatic patching machine is connected with the left stirring barrel and the right stirring barrel through a tee joint, a pneumatic stirrer is arranged in the stirring barrel, the spray gun and the pneumatic patching machine are connected through a high-pressure pipe, and an extension rod can be used if long-distance spraying is needed.
The pneumatic patching machine does not need electricity, is safe and reliable, and has small volume, light weight, large pressure and convenient movement.
The invention has the beneficial effects that: the underground thin spraying material has the characteristics of gas mine sealing, deep well heat insulation, weathering resistance, rust prevention, roadway beautification, flame retardance, static resistance and the like. The method is mainly suitable for sealing, reinforcing, outburst prevention, weathering prevention, roadway beautification and the like of underground roadways. The concrete spraying machine can effectively solve the defects of low construction speed, poor labor environment, high material consumption, high auxiliary transportation capacity, multiple potential safety hazards and the like in the existing concrete spraying technology, and is an ideal material for spraying underground coal mine roadways. The thin guniting combines novel guniting construction technology and pneumatic guniting device, and the left and right mixing drums work alternately and the pneumatic high-pressure spray gun is arranged, so that the construction efficiency is high, the safety is ensured, the guniting speed and quality are improved, the working environment is improved, the cost is reduced, and better economic benefit and social benefit are obtained.
In order to make the technical solutions of the present invention better understood and make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in further detail with reference to examples below.
Drawings
Fig. 1 is a schematic structural view of a pneumatic spraying device of the present invention, wherein: the pneumatic jet grouting machine comprises a left handrail 1, a right handrail 2, a pneumatic jet grouting machine 3, a left stirring barrel 4, a right stirring barrel 5, a left pneumatic stirrer 6, a right pneumatic stirrer 7, a high-pressure pipe 8, a spray gun 9, a tee joint 10, a left valve 11, a right valve 12 and a base 13.
Detailed Description
Example 1-7 is a method for making a thin blasting material for a coal mine.
Example 1: a method for manufacturing a thin spray material under a coal mine comprises the following steps: the thin spraying material for the underground coal mine is prepared from inorganic filler, high-standard white cement, polymer powder, quartz powder, titanium dioxide, redispersible latex powder, calcium sulphoaluminate and other auxiliaries according to a certain proportion; the inorganic filler, the high-grade white cement, the polymer powder, the quartz powder, the titanium dioxide, the redispersible latex powder, the calcium sulphoaluminate and other auxiliary agents are as follows by weight percent: 36:18:13:8: 4: 4: 2: 2; when in preparation, the raw materials are uniformly mixed, packaged and stored to form the thin spraying material.
Example 2: a method for manufacturing a thin spray material under a coal mine comprises the following steps: the thin spraying material for the underground coal mine is prepared from inorganic filler, high-standard white cement, polymer powder, quartz powder, titanium dioxide, redispersible latex powder, calcium sulphoaluminate and other auxiliaries according to a certain proportion; the inorganic filler, the high-grade white cement, the polymer powder, the quartz powder, the titanium dioxide, the redispersible latex powder, the calcium sulphoaluminate and other auxiliary agents are as follows by weight percent: 44:22:17:12: 6: 6: 3: 3; when in preparation, the raw materials are uniformly mixed, packaged and stored to form the thin spraying material.
Example 3: a method for manufacturing a thin spray material under a coal mine comprises the following steps: the thin spraying material for the underground coal mine is prepared from inorganic filler, high-standard white cement, polymer powder, quartz powder, titanium dioxide, redispersible latex powder, calcium sulphoaluminate and other auxiliaries according to a certain proportion; the inorganic filler, the high-grade white cement, the polymer powder, the quartz powder, the titanium dioxide, the redispersible latex powder, the calcium sulphoaluminate and other auxiliary agents are as follows by weight percent: 36:22:13:12: 4:6: 2: 3; when in preparation, the raw materials are uniformly mixed, packaged and stored to form the thin spraying material.
Example 4: a method for manufacturing a thin spray material under a coal mine comprises the following steps: the thin spraying material for the underground coal mine is prepared from inorganic filler, high-standard white cement, polymer powder, quartz powder, titanium dioxide, redispersible latex powder, calcium sulphoaluminate and other auxiliaries according to a certain proportion; the inorganic filler, the high-grade white cement, the polymer powder, the quartz powder, the titanium dioxide, the redispersible latex powder, the calcium sulphoaluminate and other auxiliary agents are as follows by weight percent: 44:18:17:8: 6: 4: 3: 2; when in preparation, the raw materials are uniformly mixed, packaged and stored to form the thin spraying material.
Example 5: a method for manufacturing a thin spray material under a coal mine comprises the following steps: the thin spraying material for the underground coal mine is prepared from inorganic filler, high-standard white cement, polymer powder, quartz powder, titanium dioxide, redispersible latex powder, calcium sulphoaluminate and other auxiliaries according to a certain proportion; the inorganic filler, the high-grade white cement, the polymer powder, the quartz powder, the titanium dioxide, the redispersible latex powder, the calcium sulphoaluminate and other auxiliary agents are as follows by weight percent: 38:21:14:11: 4.5: 5.5: 2.3: 2.7; when in preparation, the raw materials are uniformly mixed, packaged and stored to form the thin spraying material.
Example 6: a method for manufacturing a thin spray material under a coal mine comprises the following steps: the thin spraying material for the underground coal mine is prepared from inorganic filler, high-standard white cement, polymer powder, quartz powder, titanium dioxide, redispersible latex powder, calcium sulphoaluminate and other auxiliaries according to a certain proportion; the inorganic filler, the high-grade white cement, the polymer powder, the quartz powder, the titanium dioxide, the redispersible latex powder, the calcium sulphoaluminate and other auxiliary agents are as follows by weight percent: 42:19:16:9: 5.5: 4.5: 2.7: 2.3; when in preparation, the raw materials are uniformly mixed, packaged and stored to form the thin spraying material.
Example 7: a method for manufacturing a thin spray material under a coal mine comprises the following steps: the thin spraying material for the underground coal mine is prepared from inorganic filler, high-standard white cement, polymer powder, quartz powder, titanium dioxide, redispersible latex powder, calcium sulphoaluminate and other auxiliaries according to a certain proportion; the inorganic filler, the high-grade white cement, the polymer powder, the quartz powder, the titanium dioxide, the redispersible latex powder, the calcium sulphoaluminate and other auxiliary agents are as follows by weight percent: 40:20:15:10: 5:5: 2.5: 2.5; when in preparation, the raw materials are uniformly mixed, packaged and stored to form the thin spraying material.
In examples 1 to 7:
the inert powder material plays a role in explosion prevention, the high-grade white cement plays a role in rapid solidification, the polymer powder (mainly acrylic acid monomer polymer) is used for firm adhesion, the quartz powder is corrosion-resistant and high-temperature-resistant, the titanium dioxide high-stability is used for the surface covering agent, the redispersible latex powder plays a role in adhesion, the calcium sulphoaluminate plays a role in expansion, the defoaming agent is used for eliminating foam, the water repellent is acid-base resistant and ageing resistant, and the cellulose ether plays a role in water retention. The pigment is mainly iron red or iron green, and the color of the thin spray material can be changed after the pigment is added, so that the pigment is used for roadway beautification.
If the calcium powder and the stone powder are selected as the inorganic filler, the weight ratio of the calcium powder to the stone powder is as follows: stone powder = 1.8-2.2: 1, the preferred proportion is calcium powder: stone powder = 2: 1.
the other auxiliary agents are defoaming agents, water repellents and cellulose ether; the other auxiliary agents are defoaming agents, water repellents, cellulose ether and/or pigments, and the weight ratio is as follows: 42-46: 20-24: 31-35, preferably in weight ratio: 44:22: 33. further: the other auxiliary agents also comprise pigments, wherein the pigments are mainly iron red or iron green, and the color of the thin spray material can be changed after the pigments are added, so that the thin spray material is used for roadway beautification. If the other auxiliary agents comprise pigments, the weight ratio of the antifoaming agent to the water repellent to the cellulose ether to the pigments is as follows: 38-42: 18-22: 28-32: 8-12, preferably the weight ratio is: 40:20: 30: 10.
example 8: the thin spraying material construction method for the underground coal mine comprises the following steps of (1) mixing any one of the thin spraying materials in the embodiments 1-7 with water according to the mass ratio of 2:1, and spraying the mixture by a pneumatic spraying machine, wherein the spraying thickness is 4-5 mm, and the spraying speed is 5-20 m/min.
Example 9: the pneumatic thin-spraying guniting device for the underground coal mine comprises a base 13, wherein a pneumatic guniting machine 3, a stirring barrel and a pneumatic stirrer are arranged on the base 13, the stirring barrel is divided into a left stirring barrel 4 and a right stirring barrel 5, the pneumatic stirrers, namely a left pneumatic stirrer 6 and a right pneumatic stirrer 7, are respectively arranged in the stirring barrels, and the left stirring barrel and the right stirring barrel work alternately; the inlet of the pneumatic patching machine 3 is connected with the bottoms of the left and right mixing tanks through a tee joint 10, the bottom of the left mixing tank 4 is provided with a left valve 11, the bottom of the mixing tank 5 is provided with a right valve 12, the outlet of the pneumatic patching machine 3 is connected with a high-pressure pipe 8, the tail end of the high-pressure pipe 8 is provided with a spray gun 9, and an extension bar can be used if long-distance spraying is needed; the left handrail 1 and the right handrail 2 are arranged at the left end and the right end of the base 13.
The pneumatic patching machine 3, the left pneumatic stirrer 6 and the right pneumatic stirrer 7 are respectively connected with an air source.
The left stirring barrel and the right stirring barrel work alternately, namely when the left stirring barrel is uniformly stirred and spraying is normally carried out, water and thin spraying materials are added into the right stirring barrel in proportion for stirring; when the thin spraying material in the left stirring barrel is sprayed, closing the left valve and opening the right valve to start spraying the thin spraying material which is just stirred uniformly in the right stirring barrel, and simultaneously adding water and the thin spraying material into the left stirring barrel in proportion for stirring; and when the thin spraying material in the right stirring barrel is sprayed, closing the right valve and opening the left valve to spray the thin spraying material which is just stirred uniformly in the left stirring barrel.
If desired, a slide rail or a wheel may be provided under the base 13.
The opening and closing of the left valve and the right valve can be manually operated or realized pneumatically.
Pneumatic patching machine and pneumatic agitator all use the air supply as power, need not the power consumption, safe and reliable, pneumatic patching device, compact structure is light, and pressure is big, small, light in weight (the total weight is 35 Kg), and convenient the removal (two people can easily lift up the removal), the construction of being convenient for. Meanwhile, the investment of large-scale equipment is reduced, the cost is saved, and the construction is safe and reliable.
When the underground roadway thin spraying material mixer is used, an air source is connected with the pneumatic spraying machine 3, the left pneumatic stirrer 6 and the right pneumatic stirrer 7, the underground roadway thin spraying material and water are added into the left stirring barrel 4 according to the weight ratio of 2:1, an air source switch of the left pneumatic stirrer 6 is turned on, the left pneumatic stirrer 6 starts to work, the rotating speed is controlled to be about 500rpm for stirring 5 minutes at the beginning, and then is stirred for 10 minutes at the rotating speed of 1500 plus 2000rpm, so that the thin spraying material and the water are thoroughly and uniformly mixed; after the left stirring barrel 4 finishes stirring, the left valve 11 and the air source switch of the pneumatic patching machine 3 are opened, the air pressure is controlled to be 0.2-0.7MPa, the thin patching material is conveyed to the spray gun 9 through the high-pressure pipe 8, and the spraying can be carried out by opening the switch of the spray gun 9. Then adding the thin spraying material and water of the underground roadway into a right stirring barrel 5 according to the weight ratio of 2:1, opening an air source switch of a right pneumatic stirrer 7, starting the right pneumatic stirrer 7 to work, controlling the rotating speed to be about 500rpm for stirring for 5 minutes at the beginning, and then stirring for 10 minutes at 1500-2000rpm to ensure that the thin spraying material and the water are thoroughly and uniformly mixed for spraying; after the thin spraying material in the left stirring barrel 4 is sprayed, the left valve 11 is closed, and the right valve 12 is opened to start spraying the thin spraying material in the right stirring barrel; meanwhile, the underground roadway thin spraying material and water are added into a left stirring barrel 4 … … according to the weight ratio of 2:1, and the processes are sequentially carried out according to the process flow; the method is repeated in this way, so that a large amount of working time is saved, the spraying efficiency is improved, and the cost is saved.
The pneumatic patching machine, the pneumatic stirrer and the stirring barrel are arranged on the base 13 to be integrated, the left handrail 1 and the right handrail 2 are arranged on the left side and the right side of the device, two workers can lift the spraying device to move through the left handrail 1 and the right handrail 2, and construction is facilitated. The bottom of controlling the agitator is equipped with the drain, washs the agitator with the clear water earlier after the spraying, and sewage passes through the drain and discharges, adds the clear water after the agitator sanitization and washs pneumatic patching machine 3, high-pressure line 8 and spray gun 9, waits that all equipment wash promptly after 6 clear water blowout of spray gun finishes, and spraying work finishes. After each spraying construction, construction equipment, particularly a spray gun and a pneumatic guniting machine, must be cleaned repeatedly until no gunning material remains in the pipe, the gun and the guniting machine, so that the next construction is ensured to be smooth.
The thin spraying material for the underground coal mine is prepared from various chemical materials according to a certain proportion. The flame-retardant anti-corrosion paint has the characteristics of gas mine sealing, deep well heat insulation, weathering resistance, corrosion resistance, flame retardance, static resistance and the like. The thin spraying material has high compressive strength and strong bonding force, can quickly and firmly bond rocks, metal materials, plastics and the like, has good tightness, can effectively prevent water and prevent gas from overflowing; the sprayed layer has better flexibility, bending resistance and high shearing strength; by matching with the construction process and the equipment, the spraying speed is high, the influence on the tunneling is small, and the working hours for the slurry spraying operation in the roadway construction are reduced; no dust and low rebound rate during spraying construction; the pneumatic patching machine has small volume, light weight, reduced transportation cost, small floor area on the ground and underground, saved environmental management cost and low cost. The pneumatic patching machine takes an air source as power, does not need a power supply, reduces the investment of large-scale equipment, saves the cost and has safe and reliable construction. The material is an ideal material and an advanced process for sealing, reinforcing and preventing outburst of underground roadways, preventing weathering of metal meshes, preventing corrosion and the like.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (8)
1. The method for manufacturing the underground thin spraying material of the coal mine comprises inorganic filler, high-standard white cement, polymer powder, quartz powder, titanium dioxide, redispersible latex powder, calcium sulphoaluminate and other auxiliary agents; the method is characterized in that: the inorganic filler, the high-grade white cement, the polymer powder, the quartz powder, the titanium dioxide, the redispersible latex powder, the calcium sulphoaluminate and other auxiliary agents are as follows by weight percent: 36-44:18-22:13-17:8-12: 4-6: 4-6: 2-3: 2-3; when in preparation, the raw materials are uniformly mixed, packaged and stored; forming a thin spray material; the other auxiliary agents comprise defoaming agents, water repellents and cellulose ether; the other auxiliary agents comprise a defoaming agent, a water repellent and cellulose ether, and the weight ratio is as follows: 42-46: 20-24: 31-35.
2. the method for manufacturing the coal mine underground thin blasting material according to claim 1, which is characterized in that: the inorganic filler, the high-grade white cement, the polymer powder, the quartz powder, the titanium dioxide, the redispersible latex powder, the calcium sulphoaluminate and other auxiliary agents are as follows by weight percent: 40:20:15:10: 5:5: 2.5: 2.5; the other auxiliary agents comprise defoaming agents, water repellents and cellulose ether; the other auxiliary agents are a defoaming agent, a water repellent and cellulose ether, and the weight ratio is as follows: 44:22: 33.
3. the method for manufacturing the coal mine underground thin blasting material according to claim 1 or 2, which is characterized in that: the inorganic filler is an inert powder material.
4. The method for manufacturing the coal mine underground thin blasting material according to claim 1 or 2, which is characterized in that: the inorganic filler is calcium powder and/or stone powder.
5. The method for manufacturing the underground thin injection material of the coal mine according to claim 4, wherein the method comprises the following steps: the inorganic filler is calcium powder and stone powder, and the weight ratio of the calcium powder to the stone powder is as follows: stone powder = 1.8-2.2: 1.
6. a construction method for the thin spray material in the coal mine, which is formed by implementing the method for manufacturing the thin spray material in the coal mine according to claim 1, is characterized by comprising the following steps: and (2) mixing the thin spraying material with water according to a mass ratio of 2:1, spraying the mixture by a coal mine underground thin material spraying pneumatic guniting device, wherein the spraying thickness is 4-5 mm, and the spraying speed is 5-20 m/min.
7. A pneumatic slurry spraying device for thin spraying materials under a coal mine, which is used for implementing the construction method for the thin spraying materials under the coal mine according to claim 6, is characterized in that: the structure of the pneumatic patching machine is as follows: including base, pneumatic patching machine, agitator, pneumatic agitator, high-pressure pipe, spray gun, its characterized in that: the base is provided with a pneumatic pulp sprayer, a stirring barrel and a pneumatic stirrer, the stirring barrel is divided into a left stirring barrel and a right stirring barrel, the stirring barrel is internally provided with the pneumatic stirrer, namely the left pneumatic stirrer and the right pneumatic stirrer, and the left stirring barrel and the right stirring barrel work alternately; the inlet of the pneumatic patching machine is connected with the bottoms of the left and right stirring barrels through a tee joint, the bottom of the left stirring barrel is provided with a left valve, the bottom of the stirring barrel is provided with a right valve, the outlet of the pneumatic patching machine is connected with a high-pressure pipe, and the tail end of the high-pressure pipe is provided with a spray gun.
8. The downhole thin jet pneumatic guniting device according to claim 7, wherein: the left stirring barrel and the right stirring barrel work alternately, namely when the left stirring barrel is uniformly stirred and spraying is normally carried out, water and thin spraying materials are added into the right stirring barrel in proportion for stirring; when the thin spraying material in the left stirring barrel is sprayed, closing the left valve and opening the right valve to start spraying the thin spraying material which is just stirred uniformly in the right stirring barrel, and simultaneously adding water and the thin spraying material into the left stirring barrel in proportion for stirring; and when the thin spraying material in the right stirring barrel is sprayed, closing the right valve and opening the left valve to spray the thin spraying material which is just stirred uniformly in the left stirring barrel.
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| CN113845846A (en) * | 2021-09-29 | 2021-12-28 | 山东大学 | Waterproof reinforcing and rapid sealing thin-spraying material for broken surrounding rock tunnel and spraying device |
| CN114920534A (en) * | 2022-06-14 | 2022-08-19 | 渭南陕煤启辰科技有限公司 | Thin spraying material for roadway support sealing and use method thereof |
| CN114956741A (en) * | 2022-07-13 | 2022-08-30 | 陕西华峰建材有限公司 | Inorganic environment-friendly high-strength thin spraying material for mine |
| CN115043627A (en) * | 2022-06-27 | 2022-09-13 | 济南大学 | High-toughness thin water-spraying cement-based material and preparation method and application thereof |
| CN115557773A (en) * | 2022-11-10 | 2023-01-03 | 烟台安达环保科技有限公司 | Zero-resilience support guniting material and guniting equipment |
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Application publication date: 20200424 |