142results about How to "Prevent weathering" patented technology

The invention discloses a supporting and reinforcing structure of a coal mine tunnel and a construction technology thereof. The supporting and reinforcing structure of the coal mine tunnel comprises a lane, wherein a grid-shaped reinforced layer is arranged on the inner wall of the lane, an anchor rod is arranged on the grid node portion of the reinforced layer, the inner end of the anchor rod is anchored in surrounding rock of the lane, and an anchor plate and a nut of the anchor reinforced layer are arranged at the outer end of the anchor rod. A concrete spraying layer covered on the reinforced layer and arranged at the outer end of the anchor rod is further arranged on the inner wall of the lane, a grouting anchor rod is arranged in the surrounding rock of the lane, an anchor cable is further arranged in the surrounding rock of the lane, the inner end of the anchor cable is anchored in the surrounding rock of the lane, and the outer end of the anchor cable is anchored on the outer side of the concrete spraying layer through a tray and a tensioning lock. The supporting and reinforcing structure of the coal mine tunnel integrates the surrounding rock of the lane in cementing mode with the initiative supporting theory as the guidance, prestress is reserved in the rock body, and stress is released and superimposed slowly, so that self integral strength and stability of soft rock and coal body are improved, the surrounding rock in a release ring of the lane can form a structure relatively homogenous and stable, and the aim of reinforcing and protecting the soft rock lane can be achieved within a long time.

The invention provides a filling-reclaiming method for building land in coal mining subsidence areas, which belongs to the technical field of mining and is used to solve the problem of developing and utilizing coal gangue. The invention adopts a technical scheme that the method is implemented according to the following steps: a, draining accumulated water in reclamation areas and clearing silt; b, striping and stockpiling surface soil; c, determining the thickness and density of coal gangue for hierarchical backfilling through a vibration pressure test; and d, performing hierarchical backfilling compaction on the coal gangue and soil. The method has the following main advantages that: 1, the ways of utilizing the coal gangue are expanded, and environmental pollution caused by stockpiling the coal gangue on ground is reduced; 2, the situation that building land is increasingly short is alleviated by reclaiming subsidence land to be the building land; and 3, the treatment for coal gangue for large-area hierarchical backfilling by a hierarchical vibration-compaction method is economical, reasonable and ideal in compaction effect, can improve the compactness and bearing capacity of coal gangue layers, and can prevent the spontaneous combustion or efflorescence of coal gangue foundations and the separation of harmful substances from polluting local environment because hierarchical compaction greatly reduces porosity and isolates air.

The invention discloses a method for improving slope stability of expansive soil and controlling structural damage of the expansive soil. An expansive soil slope form obtained through the method prevents direct contact of the expansive soil and the atmosphere and effectively avoids weathering of the expansive soil. A water-proof geomembrane is covered on a surface layer of the expansive soil, drainage facility is arranged on the surface layer of the expansive soil, variation range of water-containing rate in the expansive soil can be effectively reduced, and expansive deformation of the expansive soil is reduced. An overlaying load function further limits expansive and shrinkage deformation of the expansive soil and generation and development of fractures, avoids structural damage of the expansive soil, and prevents the structural strength from being reduced, each stagee of stopping wall adopts a flexible protection structure which can avoid damage of the structure caused by discordant deformation between the expansive soil and the structure, so that a slope protection structure has strong capacity to be adapted to deformation and antidumping capacity. The method for improving slope stability of expansive soil and controlling structural damage of the expansive soil is simple and convenient to construct and good in effect.

A process for preparing a hydrophobic solution and a hydrophobic glass used for the windscreen of car is disclosed. Said hydrophobic solution is prepared from CF3(CF2)5C2H4Si(OC2H5)3, Si(OC2H5)4, C2H5OH, deionized water, and hydrochloric acid through proportional mixing, and stirring for 5-20 hr. Said hydrophobic glass is prepared through cleaning glass, preparing said hydrophobic solution, coating it on the surface of glass, and solidifying at 250-350 deg.C for 10 min -72 hr to form a firm hydrophobic film.

The invention relates to combined ecological slope protection of a rocky high slope, and belongs to the technical field of rocky high slope reinforcement, weathering resistance and ecological slope protection in rock and earth engineering. The slope protection combined layer comprises a lower grid layer, a temperature change resistant layer, a waterproof layer, a stabilizing layer, a nutritional matrix layer, a plant layer, an upper grid layer and steel battens. A construction method comprises the steps of determining anchoring force and an anchorage cable type and setting the slope protection combined layer. By combination and fixing of a prestressed anchorage cable and a shallow anchorage rod, three effects of reinforcing rocks, preventing weathering and greening the surface can be achieved, the construction process is simplified, and the operation is convenient.

The invention provides a coal mine explosion-proof sealed wall which comprises a roadway, two sealed walls, a filled wall and two grouting areas, two cutting grooves are formed in the periphery of theinner wall of a roadway sealing section needing to be sealed in parallel in the upward direction, the two sealed walls are arranged in the two cutting grooves respectively, and the filled wall is arranged between the two sealed walls; grouting areas are arranged on the side walls of the periphery of the roadway on the two sides of the two sealed walls respectively, a water discharging pipe, an observation pipe, a filling pipe, a goaf grouting or nitrogen injection pipe and an inspection pipe are sequentially arranged between the two sealed walls from bottom to top, a plurality of grouting pipes are arranged on the surface of the roadway in the circumferential direction of the roadway, one ends of the grouting pipes penetrate into the roadway by 2-5 m, and the other ends of the grouting pipes are connected with grouting equipment, and the filled wall is formed by filling flexible filling materials. The sealed wall constructed by the construction method of the coal mine explosion-proofsealed wall has the advantages of being good in sealing performance and high in explosion-proof capacity, and the strength and air tightness requirements can be met to the maximum degree through material combinations with different properties and different shrinkage rates.

The invention discloses a complete non-coal-pillar continuous depressurized mining method for close-distance coal seam groups, which is applicable to coal mining engineering. The method comprises the following steps: determining the mining sequence of each coal seam in a coal seam group; when a first coalface of a first mined coal seam is mined, building a filling wall in which a breather pipe is arranged along the edge of a goaf so as to form a gob-side entry retaining, taking the roadway as a transportation roadway when a second coalface is mined, continuing to perform a gob-side entry retaining in a track roadway, breaking and removing a flexible film bag on the surface of the previous gob-side entry retaining behind the coalface, and when the coal recovery of the second coalface is completed, filling carbon dioxide into the breather pipe in the filling wall of the first coalface so as to prompt the filling wall to have a carbonization reaction and then break and disassemble. After a coal seam is completely mined, because a top plate is not supported by a coal-rock pillar, the top plate can move and sink fully, so that the depressurized mining on adjacent coal seams is realized, thereby avoiding the stress concentration produced by the hangover of the filling wall, and facilitating the maintenance for mining spaces, the extraction of gas and the prevention and control of dynamic disasters.

A decorative board, comprising a decorative board body, the decorative board body is provided with a concave texture engraved by a numerical control engraving machine, and a pattern decorative layer formed by a numerical control inkjet printer is arranged in the concave texture, and the concave texture is filled with Has a transparent protective layer. The decorative board completely covers the pattern in the texture through a transparent protective layer, which can avoid color fading, and can be applied to decorative occasions such as outdoors with harsh natural conditions. Simultaneously, the present invention also provides the production process of the decorative panel, which combines the CNC engraving machine and the CNC inkjet printer well, through the input of data files including patterns, the positioning and data of the CNC engraving machine and the CNC inkjet printer equipment. The CNC engraving machine engraves the corresponding concave texture on the surface of the decorative plate, and the CNC inkjet printer prints the corresponding pattern in the concave texture, which overcomes the limitation that the existing inkjet printer can only print flat patterns and improves production efficiency. Reduced production costs.

The invention relates to the technical field of civil engineering, in particular to an ecological protection system of a cut-off embankment side slope, and is suitable for ecological protection construction of a cut-off embankment side slope. The ecological protection system for the cut-off embankment side slope comprises a herringbone framework structure, a lining concrete precast block structurewith bottom supporting, pulling and pressing stability, and a shaped sliding type material conveying and curing slope frame structure. The invention deepens the design of the herringbone framework side slope protection system, the slope protection design and construction are simple and convenient, a good side slope protection effect is achieved, natural vegetation is recovered, erosion and weathering of a side slope are prevented, water and soil loss is prevented, and environmental protection is facilitated. Meanwhile, the invention further provides a construction method, the method is convenient to construct, the construction progress is accelerated, devices can be recycled, side slope stair tread can be poured in a segmented mode, the construction progress is convenient to control, meanwhile, the problem of material transportation on the side slope is solved, positioning of an pre-embedded steel plate can be effectively achieved, and a guarantee is provided for installation of an embankment handrail.

The invention relates to a bolt net coal road spraying material which is added with polyacrylate emulsion and modified on the basis of components such as cement, water reducing agent and accelerating agent. The spraying material can be separately added with 801 adherent and fly ash, silica powder and fly ash, and silica powder and sand for three different injection conditions, namely the normal enclosed environment, small water pouring environment and complicated geological structure environment of the coal road to increase the mechanical properties and using effects. The spraying material has high adhesive strength to the coal wall and the bolt net, high elongation ultimate, high tensile strength, low tensile elastic modulus, small shrinkage, much higher crack resistance, high permeability resistance and much higher compactibility, the spraying material can protect the internal bolt net from erosion and obviously slower the corrosive velocity; the spraying material has good ageing resistance and can reach the aim of delaying the corrosion of the bolt net and the coal wall. In addition, the spray layer is thin and uniform, the construction speed is quick, and the resilience rate, the dust concentration and the cost are low.

The invention discloses a high-performance concrete organic-inorganic composite additive. The composite additive comprises the following components by weight percent: 30-90% of active powder, 0-10% of sodium silicate and 5-70% of surface active agent. The additive disclosed by the invention is suitable for long-distance transportation; by using the additive, the compaction is increased, the durability is improved, and concrete can obtain high early strength. The additive is especially suitable for steaming and improvement of early strength.

The invention relates to a high-strength cement sound-absorbing plate, which comprises a sound-absorbing layer and a sound-insulating layer, wherein a cavity is formed between the sound-absorbing layer and the sound-insulating layer; sound-absorbing materials are filled into the cavity; the surface of the sound-absorbing layer is provided with a plurality of shutter-type sound-absorbing holes communicated with the cavity. The gradient of a shutter-type sound-absorbing hole window is set in such a manner that dust, rain and snow can be prevented from entering the inside of the sound-absorbing plate, and the sound-absorbing material is prevented from being corroded by rain and snow; the surface of the sound-absorbing plate has a hydrophobic effect, so that the problem of accelerated aging caused by freezing and thawing effects can be solved effectively, damages of moisture and cold to the sound-absorbing plate are prevented, and meanwhile weathering can be prevented; the high-strength cement sound-absorbing plate is molded at a time via a mold, and a unit plate has high structural stability and high structural strength; perlite and the like are taken as sound-absorbing materials, so that the structural strength of the sound-absorbing plate is enhanced while the sound-absorbing effect is ensured.

The present invention discloses a container and a fire-proof layer fabrication method thereof. The container includes a box body containing metal plates; computing equipment, set in the box body; and a fire-proof layer, formed on the metal plates. By forming the fire-proof layer on box body, the fire-proof layer forms a uniform compact cavernous expanded thermal insulation layer immediately when encountering fire, and prevents flame from spreading effectively, thereby accomplishing the purpose of fire-proof and flame-proof and reducing toxic smoke which generated by the flame combusting. Therefore, the invention solves the technical matters of poor fire-proof, combustion, serious security risk in box body the container in the prior art, thereby accomplishes box body fire-proofing of container, and improves the technical effects in safety of the box body of container.

The invention relates to an underground coal mine supporting method, particularly relates to a roadway surrounding rock concrete wet-spraying method, and in particular relates to a poor-quality surrounding rock concrete wet-spraying method. The poor-quality surrounding rock concrete wet-spraying method comprises the following steps: respectively sieving stones and sand with a dedicated standard stone sieve and a dedicated standard sand sieve, then mixing cement, stones and sand through a batching machine according to the mass ratio of 1:(1.5-3):(1.5-3); conveying the batched mixed materials to an agitator; adding water in the agitator according to the water-cement ratio of (0.4-0.5):1, agitating to obtain concrete, adding a water reducing agent and a hydrated agent into the concrete, wherein the addition amount of the water reducing agent is 0.8%-1wt% of the cement, and the addition amount of the hydrated agent is 0.3%-2.0wt% of the cement; transporting the concrete to a wet spraying machine, arranged underground, through an anti-explosion tank car; adding an alkali-free liquid-state accelerator into the to-be-sprayed concrete at the spray nozzle of the wet spraying machine by a peristaltic pump through a regulating valve, wherein the addition amount of the alkali-free liquid-state accelerator is 1%-3wt% of the cement, and the concrete is sprayed out from the spray nozzle of the wet spraying machine. According to the poor-quality surrounding rock concrete wet-spraying method, the problem that the supporting effect of the surrounding rock, especially poor-quality surrounding rock is poor by adopting concrete dry spraying can be solved.

A lock box assembly includes a lock box which includes a first casing and a second casing pivotally coupled to the first casing. The first casing has a combination lock disposed thereon. A protective shell is coveringly and detachably assembled with the first casing. The protective shell includes a cover panel shielding the first casing. A plurality of side panels extend from the cover panel for enclosingly forming a receiving space adapted for accommodating the first casing. At least one buckle is formed on the plurality of side panels. The cover panel has an opening defined therein and corresponds to the combination lock of the first casing. A lid is pivotally hinged to an edge of the opening for selectively shielding the opening. The protective shell and the lid protectively prevents the first casing the combination lock from exposing to weathering.

The invention provides an ecological fireproof interior trimming plate, which respectively comprises a bottom material layer, a middle material layer, a glass fiber layer, a non-woven layer and an interior trimming layer from bottom to top, wherein waterproof sealing layers coat outwards exposed surfaces of the bottom material layer, the middle material layer, the glass fiber layer, the non-woven layer and the interior trimming layer; the bottom material layer is a non-woven-cloth-covered PVC plate or a non-woven-cloth-covered TOB ceramic plate; and the interior trimming layer is formed by a PVC plate and an aluminum foil through hot pressing. The ecological fireproof interior trimming plate provided by the invention has the characteristics that the flame-retardant and fireproof effects are good; the sound isolation effect is good; the heat insulation performance is excellent; and the weatherability is high.

The invention discloses a roadway U-shaped steel sleeving shed supporting structure. The supporting method that anchor cables and a metal net are arranged, mortar spraying is conducted, a U-shaped steel sleeving shed is arranged, and grouting is conducted is adopted; firstly, an anchor net spraying layer is formed, the anchor net spraying layer has the effect of preventing surrounding rock from further weathering and deliquescing, the loads on the two sides and a roof of a roadway evenly act on supports so as to avoid stress concentration, thus, rapid press-deformation and roof caving which are caused by crushing of the surrounding rock at the initial excavation period of the roadway can be controlled effectively, and finally an anchor net spraying combination isolation arch on the surfaceof the roadway is formed; secondly, a supporting rigid layer is formed between every two layers of U-shaped steel; the roadway U-shaped steel sleeving shed supporting structure can be resistant to compression with high strength and can conduct yielding moderately, and a hardness and softness double-layer supporting structure is formed; and the stability and supporting strength of the surroundingrock of the crushed soft rock roadway are promoted greatly, a certain guarantee is provided for safe production of a coal mine, meanwhile, a certain amount of roadway maintenance cost is also reducedfor an enterprise, great benefits are achieved for development of the coal enterprise, and thus the roadway U-shaped steel sleeving shed supporting structure can be used and popularized on a large scale.

The present invention provides a method of processing cementitious products to substantially reduce or eliminate efflorescence. The method includes applying a protective layer to at least one surface of a slab product at the time of pouring cementitious mix into a mould and retaining the protective layer in place. The protective layer is a relatively thin sheet of plastic material.

A method of fueling a transporter with liquefied fuel gas includes providing a transporter having a fuel gas storage tank for holding a liquefied fuel gas, a sub-cooler fluidly connected to the fuel gas storage tank, and a consumer. Liquefied fuel gas from the fuel gas storage tank is pumped into the subcooler to create subcooled liquefied fuel gas. The subcooled liquefied fuel gas may then be introduced into the fuel gas storage tank, for example by spraying into a vapor space of the fuel gas storage tank. Liquefied fuel gas is pumped from the fuel gas storage tank to provide pressurized liquefied fuel gas, the pressurized liquefied fuel gas is vaporized and the vaporized fuel gas is provided to the consumer for propelling the means of transport using the vaporized fuel gas as a fuel.