42results about How to "Harden fast" patented technology

According to the modified fiber mining filling material and the preparation method thereof provided by the invention, through a dual modification technology of plasma treatment and a silane coupling agent, the uniform dispersity of fibers in a cementing agent is enhanced, and the properties such as rapid hardening, early strength and compressive strength retention rate of the filling material are remarkably improved. The filling material comprises cement clinker, solid waste, a retarder, an early strength agent, modified fibers, an accelerator, gypsum, a water reducing agent, a suspending agent and other raw materials, the modified fibers are treated through specific steps, surface functional groups are increased, and the compatibility and binding power of the modified fibers and a cementing agent are improved. The filling material disclosed by the invention has the advantages of good transportability, simplicity and convenience in construction, low cost and environmental protection characteristic, conforms to the development trend of green mining industry, is particularly suitable for being applied to mine filling and supporting, and has wide application prospects and social and economic values.

The invention relates to the technical field of cement, and discloses a cement material containing barium slag and a preparation method thereof.The cement material containing the barium slag is obtained by adding the barium slag, fly ash, a polycarboxylate superplasticizer, Portland cement, a boron modified quaternary ammonium salt polymer, modified ferrocene and water into a stirrer and stirring the materials evenly. Iron ions in ferrocene in the boron-modified quaternary ammonium salt polymer can be combined with hydroxyl ions in water to form a ferric hydroxide hydrate, the compound can catalyze the hydration reaction of cement, so that concrete can be hardened more quickly, the mechanical property of the concrete is enhanced, polyurethane contained in the compound can also improve the impermeability of a cement material, and the water resistance of the cement material is improved. The boron element contained in the cement can improve the durability of the cement, the sulfonic group can improve the fluidity of the cement, and the quaternary ammonium salt structure contained in the cement has a good anti-mud effect. Silicone rubber contained in the modified ferrocene can also improve the fluidity and impermeability of the cement.

The invention relates to an auxiliary mine filling slurry stope dehydration system, belongs to the technical field of mine slurry filling auxiliary tools, and solves the technical problem of mine filling slurry dehydration. The dewatering system comprises a water bleeding pipe, a water screening channel is formed in the pipe wall, and when the water bleeding pipe is inserted into mine filling slurry, water in the mine filling slurry penetrates through the water screening channel to enter the water bleeding pipe; a plurality of bleeding pipes are connected to the pipe wall of the main pipe; and the siphon device is connected with the main pipe and is used for generating negative pressure in the main pipe and the water bleeding pipe so as to suck water entering the water bleeding pipe. By means of the structure, the dewatering system can rapidly and effectively remove moisture in mine filling slurry, so that the mine filling slurry is hardened more rapidly, the filling quality is guaranteed, and the dewatering system is simple in structure, low in manufacturing cost and using cost, higher in economical efficiency and suitable for popularization and application. And the device can be suitable for dewatering mine filling slurry with different concentrations, is flexible and convenient to use, and can be repeatedly used.

The invention discloses a prefabricated flexible composite thin-layer asphalt pavement and a preparation method thereof. The composite thin-layer asphalt pavement comprises a modified asphalt mixture layer A and a modified asphalt mixture layer B which are different in gradation, the first bonding layer, the base material layer and the second bonding layer are located between the modified asphalt mixture A layer and the modified asphalt mixture B layer, the thickness of the composite thin-layer asphalt pavement is 2-2.5 cm, and the curl radius is determined according to a small beam bending test. The prefabricated rollable composite thin-layer asphalt pavement disclosed by the invention is thin in thickness, can be rollable into a small-radius structure, can greatly reduce the weight per unit area, increases the characteristics of high flexible repairing quality of the prefabricated pavement, is relatively weak in influence on the elevation of the pavement, does not need grooving paving, can quickly repair the pavement and harden the ground, and realizes carpet-type paving; and the driving performance of the pavement exceeds that of a common thin-layer asphalt pavement.

The invention relates to the technical field of powder spraying, in particular to a device capable of effectively preventing a nozzle of a powder spraying pile from being blocked and a using method of the device. The powder spraying pile comprises a supporting seat and a longitudinal frame arranged at the top of the supporting seat, a storage box used for storing a curing agent is further fixedly arranged at the top of the supporting seat, a sliding frame is arranged in the longitudinal frame in a sliding mode, and a powder spraying pile body is arranged in the sliding frame. High-temperature airflow is sprayed out, a curing agent is sprayed out along with wind flow, the curing agent is dried and impacted, the situation that the powdery curing agent is blocked before being sprayed out of the nozzle and the spraying uniformity is affected due to the fact that the powdery curing agent is moist and caked during storage is avoided, and the high-temperature airflow sprayed out of the rotary nozzle faces water in a soft foundation, so that water in the soft foundation close to the rotary nozzle can be dried. The contact between water and the curing agent at the nozzle of the rotary nozzle is reduced, the possibility of nozzle blockage is reduced, and meanwhile, when high-temperature air is exhausted, soft soil hardening can be further accelerated; and the rotary nozzle rotates, so that the subsequent mixing efficiency is improved.

The invention belongs to the technical field of prefabricated part production, and discloses a large prefabricated part surface mineralization hardening enhancing method which comprises the following steps: step 1, processing a plurality of micropores in a steel template for pouring a large prefabricated part, uniformly arranging the micropores in the steel template, and assembling a mold by using the processed steel template; and 2, steel bars are bound and then fixed in a mold, the poured concrete and the mold are arranged on a vibration table together and are compacted through the vibration table, and carbon dioxide gas is sprayed into the surface layer of the concrete. And thirdly, after compaction, the large prefabricated part is subjected to standard curing or steam curing with a mold. And 4, spraying a surface reinforcing agent liquid on the surface of the large prefabricated part, and then performing mineralization reaction in a still kettle. And 5, the autoclaved large prefabricated part is immersed in saturated lime water to be cured to a certain age. The carbonization uniformity of surface concrete is improved, and the formation efficiency of a carbonization layer is improved.

The present invention proposes a water glass sand mold three-dimensional printing device and method, wherein the water glass sand mold three-dimensional printing device includes a frame, a forming component, a sand-laying component, a spraying component and an inflation device, the sand-laying component spreads a mixture on the bottom of the cylinder body to form a sand bed for sand mold printing, the spraying component sprays a water-soluble catalyst to the sand bed in the cylinder body, the cover plate is covered on the cylinder body to form a sealed chamber, the inflation device quickly fills the sealed chamber with carbon dioxide gas to replace the air before vacuuming, thereby realizing the rapid hardening of the water glass sand mold, the sand mold printing and carbon dioxide blowing are both carried out in the cylinder body, there is no need to change the work station, and the printing efficiency and accuracy of the sand mold can be improved.

This invention belongs to the field of cement materials technology, specifically disclosing a fast-setting silica-alumina phosphate cement and its preparation method. The cement includes main components and functional regulating components. The main components are 50%-70% silica-alumina raw materials, 20%-30% heterocyclic organophosphate activating raw materials, and 10%-20% modified silicate calcium raw materials. The functional regulating components include heterocyclic solvents, metal chelate polymerization accelerators, and polyhydroxy coordination early-strength agents. The functional regulating components are added additionally based on the total mass of the silica-alumina raw materials and modified silicate calcium raw materials as 100%. This invention achieves rapid setting and hardening at room temperature through the synergistic effect of the heterocyclic organophosphate activator and the functional regulating components, eliminating the need for high-temperature curing. It exhibits excellent early strength and long-term stability. The raw materials can utilize various industrial solid wastes, making it environmentally friendly and economical. It is suitable for emergency repairs, rapid construction, and low-temperature environments.

The utility model discloses a gluing machine for wafers, which relates to the field of wafer processing and comprises a transverse plate, a driving component is mounted at the lower end of the transverse plate, an L-shaped plate is mounted on the left portion of the upper end of the transverse plate, a rotatable hollow cylinder is arranged in the middle of the upper end of the transverse plate, and a drying component is mounted on the right portion of the upper end of the L-shaped plate. And three second electric cylinders distributed in an annular array mode are installed on the lower inner wall of the hollow cylinder, first motors are installed at the output ends of the second electric cylinders correspondingly, suction cups are installed at the output ends of the three first motors correspondingly, the outer surface of the hollow cylinder is movably sleeved with a guide ring, and the guide ring is installed on the transverse plate. According to the utility model, the driving part, the second electric cylinder, the first motor and the suction cup are matched together, so that the working efficiency can be improved, the wafer can be conveniently and continuously glued, the time waste is reduced, and the productivity is improved.

The utility model provides a kind of air jug automatic discharging device, it can overcome air jug sticking, direction random overturning and falling impact damage and other technical problems in production process, it includes vibration sequencing mechanism, directional material conveying mechanism and pneumatic posture adjusting mechanism, vibration sequencing mechanism includes the vibration disc of inclination arrangement, the width of the material inlet end of vibration disc is greater than the width of material outlet end, the length of the product detection sensor is matched in material inlet end with the width of material outlet end and cone air jug product;Directional material conveying mechanism includes at least one material conveying channel, and the material conveying channel is sequentially communicated by falling section, buffer section and horizontal conveying section;Pneumatic posture adjusting mechanism is arranged in falling section, and the posture of product is entered horizontal conveying section by the difference of the cross-sectional area of both ends of product with the directional airflow acting on cone air jug product.

The utility model relates to ancient tree famous and distinguished tree trunk hollow repair technical field discloses a kind of layered filling and solidification forming equipment for ancient tree famous and distinguished tree trunk hollow repair, including support base plate, mixing box, the right side position of support base plate top is fixed with mixing box, and the intercalation of front and back connecting plate is provided with pin, and the outside of the both ends of pin is connected with locking nut.The utility model passes through the position of feeding opening feeding, the filling material required is fed to the inside of mixing box, when not needing filling, two support seat can be adjusted to approach the outside position of second pipeline, then after the intercalation pin of connecting plate position, locking nut is locked position, to this end, the support of second pipeline tail end second nozzle position is facilitated, when needing to use, then locking nut can be removed, then after holding the outside of second nozzle, first bellow is used to stretch second pipeline, second nozzle finally carries out filling work, and the placing capacity for pipeline is facilitated.

The invention relates to the technical field of building ardealite powder hydration regulation and control, and discloses semi-dry ardealite brickwork hydration regulation and control equipment which comprises a hydration stirring mechanism configured to be a hydration space with heat preservation and pressure preservation, and the hydration space is internally provided with a planet multi-group stirring piece with a multi-path high-speed timing stirring function. Building phosphogypsum powder, dihydrate phosphogypsum powder, a hydration regulation and control auxiliary agent and water are intermittently doped into the hydration space synchronously and asynchronously; the dry material metering mechanism is configured to be used for metering and weighing the building phosphogypsum powder and the dihydrate phosphogypsum powder; the liquid material metering mechanism is configured to be used for metering and weighing the water and the hydration regulation and control auxiliary agent; the regulation and control method comprises the following steps: step 1, regulating and metering dry materials; 2, regulating and metering a liquid material; 3, initial hydration regulation and control; step 4, hydrating characteristic regulation and control; and step 5, stirring speed control regulation and control. According to the method, the beta-semi-hydrated phosphogypsum is subjected to accurate hydration regulation and control treatment in the batching process, so that the thorough hydration reaction of the beta-semi-hydrated phosphogypsum can be ensured.

The invention relates to temperature-sensitive concrete slurry and a concrete 3D printing temperature-control forming construction method, and relates to the field of 3D printing concrete, and the method comprises the following steps: obtaining an application scene and a printing demand; determining the type of a temperature-sensitive material based on the application scene; searching a corresponding material doping proportion from a preset response database based on the printing demand and the type of the temperature-sensitive material; the temperature-sensitive concrete slurry is formed based on the material doping proportion and is printed, and the temperature control instruction is executed, so that the physical characteristics of the concrete are adjusted by controlling the temperature of the concrete, and rapid hardening, continuous printing, strength improvement and function diversification of the concrete are realized; the structural strength and the stability of the concrete are improved.

The invention discloses an admixture capable of reducing cement flow velocity, and belongs to the technical field of cement grinding admixtures. The additive comprises a diethanolisopropanolamine component, a sodium thiocyanate component, molasses, a carboxylic acid polymer and water. A carboxylic acid polymer formed by acrylic acid modified unsaturated polyol is introduced and is adsorbed on the surfaces of cement particles through a carboxyl structure, and the sliding resistance among the cement particles is increased by utilizing a long-chain branch structure, so that the cement fluidity is reduced. Secondly, sodium thiocyanate is added, so that the fluidity of the cement is further reduced, the setting time of the cement is shortened, the concrete is rapidly hardened, and the strength of the cement is improved. Therefore, the admixture provided by the invention can reduce the cement flow rate, improve the belt delivery capacity and meet the cement delivery requirements under the condition that the use effect of the grinding aid is not influenced.

The invention provides high-strength repairing cement and a preparation method thereof, and relates to the technical field of preparation of epoxy resin cement. The daub is composed of a component A and a component B in equal proportion, the component A is composed of epoxy resin, talcum powder, barium sulfate, modified graphite powder, calcium stearate, dodecylphenol and graded particle size quartz powder, and the component B is composed of a curing agent, talcum powder, barium sulfate and titanium dioxide. The defects in the prior art are overcome, the good adhesion effect of the cement is guaranteed, meanwhile, the mechanical strength of the hardened cement is effectively improved, and the repairing effect of the cement is comprehensively improved.

The present invention belongs to the technical field of preparation of new and old concrete interface repair agents, and the present invention discloses an interface repair agent for concrete, a preparation method and an application thereof. The interface repair agent for concrete of the present invention comprises a solution of sodium fluorosilicate and a solution of PSCA; the solution of PSCA comprises potassium hydroxide, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane and water. The present invention obtains repaired concrete by spraying a solution of sodium fluorosilicate and a solution of PSCA on the surface of the concrete to be repaired, respectively, and then repairing the concrete to be repaired. The repaired concrete has excellent bonding properties at the interface between new and old concrete, and the repaired concrete has excellent acid resistance, and the interface bonding properties of the concrete after acid corrosion can still reach a high level.

The application discloses a shotcrete rebound-reducing agent and a preparation method thereof. The shotcrete rebound-reducing agent is prepared from the following raw materials in mass percentage: 15-30% of a quick-setting component, 2-5% of a viscosity-increasing component, 10-15% of a reinforcing component, 2-5% of an anti-freezing component, 1-4% of a stabilizer, and the rest of water; and the viscosity-increasing component is a combination of polyvinylpyrrolidone and modified carboxymethyl cellulose. The prepared shotcrete rebound-reducing agent has the advantages of good sprayability, high hourly strength, good anti-freezing and stability, and the like, can improve the working performance of shotcrete, reduce the content of a quick-setting agent and significantly reduce the rebound rate of shotcrete, and has good economic benefits.

The invention discloses a quick-setting and quick-hardening cement clinker as well as a preparation method and application thereof. The clinker is prepared from the following components in percentage by weight: 11.15 to 22.76 percent of calcium sulphosilicate, 22.21 to 28.00 percent of calcium sulphoaluminate, 39.28 to 45.72 percent of dicalcium silicate, 7.93 to 9.29 percent of calcium sulfate, 2.33 to 3.64 percent of iron phase, 0.49 to 1.52 percent of free calcium and the balance of mixed mineral components; the clinker is prepared from the following raw materials in percentage by weight: 51.0 to 52.0 percent of limestone, 28.0 to 30.0 percent of phosphogypsum, 9.0 to 11.0 percent of fly ash and 8.0 to 11.0 percent of bauxite. By regulating and controlling the proportion and content of all the components, the clinker meeting the requirements is prepared while the mineral activity is improved, the early-stage hydration speed is high, the early-stage strength is high, and stable development of the later-stage strength is also ensured.

The invention relates to the field of building materials, in particular to silicon-aluminum cementing material concrete and a preparation method thereof. The silicon-aluminum cementing material concrete comprises 100 to 200 parts of red mud, 0 to 100 parts of fly ash, 0 to 100 parts of steel slag, 0 to 100 parts of lithium slag, 100 to 300 parts of slag powder, 0 to 100 parts of cement, 0 to 50 parts of gypsum, 150 to 200 parts of water, 40 to 50 parts of an alkali activator, 10 to 40 parts of steel fiber, 700 to 750 parts of sand, 900 to 1200 parts of gravel and 1 to 5 parts of a water reducing agent. The water reducing agent comprises a naphthalene-based superplasticizer and calcium lignosulphonate; the cement comprises Portland cement and / or Portland cement clinker. The using amount of solid waste can reach 90%, the compressive strength of the concrete cured for 1 d is larger than 30.0 MPa, the compressive strength of the concrete cured in water for 28 d is larger than 60.0 MPa, and the concrete has the advantages of being fast in strength forming and high in final strength.

A quartz crucible high-pressure slip casting process, the specific process steps are: model compaction - slurry pressurization - slip casting - heat conduction oil heating - green body stripping - model self-cleaning - crucible high-pressure slip casting process operation flow is completed.The forming process disclosed in the application has the advantages that the crucible high-pressure slip casting process is short in time, the crucible green body structure is uniform and compact, the inner and outer walls of the crucible are smooth, the crucible green body is rapidly hardened through the heating function of the model outside, demolding is convenient, and the forming efficiency is high.

The utility model discloses an oxide skin cleaning device for high chromium steel forge piece production, which comprises a machine body, the lower surface of the machine body is fixedly connected with a collecting box, the front surface of the machine body is embedded and connected with a linkage module, the linkage module comprises conveying rollers and a first stepping motor, the inner wall of the machine body is rotatably connected with a plurality of conveying rollers, and the first stepping motor is connected with a second stepping motor. According to the high-chromium steel cleaning device, the cleaning belt can be rapidly replaced, the cleaning belt can be adjusted by replacing the cleaning belts with different lengths, the cleaning belt can clean the front surface and the rear surface of high-chromium steel, the distance of the cleaning seat in the vertical direction can be manually adjusted by rotating the bolts on the cleaning seat, and the cleaning belt makes contact with the upper surface or the lower surface of the high-chromium steel. And the two sets of cleaning modules are arranged, oxide skins on the multiple side faces can be cleaned at the same time, the cleaning efficiency of the device is improved, and the device is suitable for high-chromium steel of different specifications.

The invention belongs to the technical field of earthen archaeological site building material repairing, and provides an earthen archaeological site reinforcing mortar material based on hydraulic lime and an MICP technology and a preparation method and application thereof. The earthen archaeological site reinforcing mortar material is prepared from the following raw materials: modified soil and activated ureococcus liquid, the modified soil comprises a cementing material, silt and water; the cementing material comprises natural hydraulic lime and slaked lime in a mass ratio of (2-4): 2, the mass ratio of the cementing material to the silt is (23-27): 100, and the mass ratio of the silt to the water is (22-26): 100. The earthen archaeological site reinforcing mortar material has excellent mechanical properties and good workability, and meets the normal construction requirements of earthen archaeological sites; the anti-seepage performance and the anti-expansion performance are good, and the expansion rate is smaller than 0.1%; the problems of cracking and falling off do not occur in a short time after reinforcement; and the coating can be condensed and hardened to generate strength in a dry environment and a humid environment, so that the construction requirements in different seasons are met.

The invention provides a composite gas drying agent as well as a preparation method and application thereof, and relates to the technical field of drying agents. The method comprises the following steps: sequentially carrying out pre-drying, crushing and flash dehydration on aluminum hydroxide to obtain activated aluminum oxide powder; mixing the activated aluminum oxide powder with FAU type molecular sieve raw powder and forming liquid (ammonium bicarbonate aqueous solution), and forming to obtain a to-be-cured intermediate; performing health maintenance on the intermediate to be subjected to health maintenance to obtain a health maintenance intermediate; and sequentially drying and roasting the curing intermediate to obtain the composite gas drying agent. The prepared composite gas drying agent has excellent water adsorption performance and compressive strength, and also has excellent CO2 adsorption performance. The result of the embodiment shows that the static water adsorption (25 DEG C, RH 60%) of the composite gas drying agent is larger than or equal to 21%, the static CO2 adsorption capacity (25 DEG C, 250 mmHg) is larger than or equal to 8%, and the crushing resistance is larger than or equal to 140 N.

The application relates to the technical field of concrete pavements, and discloses a reinforced material for concrete pavements and a use method thereof. The reinforced material comprises dry materials and wet materials. The dry materials are as follows: 200-400 parts of white cement clinker, 70-120 parts of modified mineral powder, 300-700 parts of tailing sand, 50-140 parts of lithium slag powder and 5-50 parts of pigment. The wet materials comprise component 1 and component 2. The component 1 is composed of 10-30 parts of nano silicon oxide sol, 10-20 parts of polyaluminum, 10-30 parts of sodium silicate, 5-20 parts of aluminum sulfate, 5-10 parts of urea and 100-300 parts of water. The component 2 is composed of 5-10 parts of glue powder, 5-10 parts of 3-aminopropyltrimethoxysilane and 80-90 parts of water. The dry materials are sprayed on the surface of the concrete by a spraying machine or are uniformly vibrated on the surface of the concrete by a vibrating screen, and the wet materials are sprayed on the surface of the concrete by a sprayer, and then are collected and smoothed, so that the problems of low strength, easy falling and alkali return of the traditional reinforced material are solved.

The application relates to a rapid-forming geopolymer concrete prefabricated component and a preparation method thereof. The technical scheme is as follows: 125-150 parts by mass of sodium metasilicate is mixed with 200-235 parts by mass of water to obtain a solution; the solution is stirred until it is clear, and is cooled to 5-15 DEG C to obtain an alkali activator; the alkali activator is mixed with 225-285 parts by mass of metakaolin, 60-120 parts by mass of fly ash, 400-600 parts by mass of fine aggregate and 550-850 parts by mass of coarse aggregate, is stirred, is poured, and is shaped for 10-30 min; demolding is carried out, and maintenance is carried out at normal temperature for 2-7 days to obtain the rapid-forming geopolymer concrete prefabricated component. The application has the characteristics of high solid waste resource utilization rate, short forming time, low maintenance cost and high mold flow efficiency, can be directly operated on a construction site and can be rapidly and continuously produced, and the prepared rapid-forming geopolymer concrete prefabricated component has early compressive strength.

The present invention proposes a method for preparing a ceramic shell for casting, which relates to the field of casting technology. The preparation method comprises the following steps: S1, preparing a mold for molding; S2, covering the mold with a casting film, and closely attaching the casting film to the surface of the mold by negative pressure suction; S3, printing on the surface of the mold after coating, evenly spreading a ceramic slurry with self-hardening properties on the mold, and hardening while printing; S4, when the ceramic slurry closely covers the surface of the mold and completely hardens into a ceramic layer, the ceramic layer is removed from the mold to obtain a ceramic shell. The method for preparing a ceramic shell for casting disclosed by the present invention realizes the manufacture of a shell with high precision and high surface quality by combining ceramic slurry printing with V-method casting, and has high efficiency, economy and wide applicability.

The invention discloses a formula and production process of a phosphogypsum autoclaved aerated concrete block, and relates to the field of aerated concrete. The phosphogypsum autoclaved aerated concrete block in the invention comprises slag, graphite tailings, an alkali component, a foaming agent, a catalyst and a foam stabilizer; the composite foaming agent comprises sodium dodecyl sulfate, sodium salt of octadecyl alcohol polyoxyethylene ether sulfate, sodium salt of phosphate monoester and phosphogypsum, which improves the foaming power and enhances the stability of the foam; the foam stabilizer is cellulose starch, which is obtained by reacting carboxymethyl cellulose with epoxy starch, and can accelerate coagulation and hardening, and improve the strength; the slurry prepared by mixing slag, graphite tailings powder, an alkali component, a foaming agent, a catalyst and a foam stabilizer is autoclaved and cured, and the volume stability of the aerated concrete is improved.

The invention discloses pavement rapid hardening, paving and leveling construction machinery and a construction method.The pavement rapid hardening, paving and leveling construction machinery comprises a crawler chassis, a power device and a cab and further comprises a ploughing and grouting device, a stirring device and a paving and leveling device, a cross beam is installed on the crawler chassis, and the ploughing and grouting device and the stirring device are installed at the front end of the cross beam; the paving and leveling device is installed at the rear end of the cross beam, through movement of the crawler chassis, the ploughing and grouting device firstly plows a road surface out of a gully and injects alkali-activated slurry into the gully, the stirring device fully mixes soil and the alkali-activated slurry, and then the paving and leveling device strickles and tamps the road surface which fully reacts. According to the machine, the principle of alkali-activated geopolymer solidified soil is utilized, rapid hardening of the pavement is achieved, the hardening efficiency and the construction quality of the pavement are improved, and the construction safety is improved.

The application discloses a portable two-walls-one-annulus full-process screen pipe complete hole sealing system in the field of exploration equipment and application thereof, and relates to the technical field of drilling equipment. The system comprises a drill bit, the outer side wall of the drill bit is provided with external threads, the drill bit is threadedly connected with a gas sampling pipe and a drill rod, the drill rod is sleeved outside the gas sampling pipe, a plurality of sampling holes are formed in the side wall of the gas sampling pipe, hole sealing bags are arranged at both ends of the gas sampling pipe, a grouting area is formed between the two hole sealing bags, and the hole sealing bag away from the drill bit is provided with a grouting pipe and a back grouting pipe and extends into the grouting area. A plurality of support pipes are fixedly connected to the side wall of the gas sampling pipe, the support pipes are in a hollow structure, the support pipes are filled with water-absorbing expansion materials, pressure relief assemblies are slidably connected to the inner walls of the support pipes, a plurality of release holes are formed in the side walls of the support pipes, and rupture marks are arranged on the release holes. In the initial state, the pressure relief assemblies abut against the water-absorbing expansion materials. The water-absorbing expansion materials in the cement slurry are expanded to fill the gaps generated by the hardening shrinkage of the cement slurry, so that the entry of external air or the leakage of gas is avoided.

The invention relates to sprayed concrete and a preparation method thereof, and relates to the technical field of concrete.The sprayed concrete is prepared from, by weight, 365-410 parts of cement, 790-830 parts of fine aggregate, 710-760 parts of coarse aggregate, 70-100 parts of fly ash, 75-95 parts of modified yellow phosphorus slag, 12-16 parts of accelerator, 4.5-7 parts of water reducer, 3-6.5 parts of natural plant admixture and 155-175 parts of water; the natural plant additive is prepared from beet root tubers and gelidium amansii in a weight ratio of (1-2): (5-9). On the basis of an existing shotcrete batching system, the natural plant admixture and the modified yellow phosphorus slag are introduced, all the components have a synergistic effect, the construction requirements for the initial strength and the later strength of the shotcrete are met, the rebound rate of the shotcrete is remarkably reduced, and the shotcrete has a good application prospect. The method can be widely applied to construction of various supporting projects such as tunnels and roadways.