21results about How to "Reduce subsidence" patented technology

The invention discloses a three-in-one drilling fluidized filling green mining method for a fully mechanized coal mining face. Comprising the following steps that a ground filling pump station is arranged on the ground, a filling chamber is arranged underground, and a ground filling system is responsible for filling work of a separation layer area and conveying filling materials to the underground filling chamber; and an underground filling system needs to fill the fissure zone and the caving zone. The method comprises the following steps: firstly, determining the layer position of separation grouting, the arrangement of separation drill holes, the separation grouting amount and other key conditions for implementing separation grouting filling mining according to factors such as separation occurrence time, separation space and separation development conditions; for a fissure zone and a caving zone, the height and filling amount parameters of the caving zone need to be determined. And finally, the filling system is designed, and the matching relation of the underground filling system in time and space is mainly considered. And the three-in-one filling can support the overlying strata, so that the safety of underground workers is protected, and the ground building is protected from being damaged.

The invention discloses an internal waterproof, dustproof and anti-settling device during elevator installation, and relates to the technical field of elevator installation. The internal waterproof, dustproof and anti-sedimentation device during elevator installation comprises an anti-sedimentation lower plate, a protection unit, a limiting unit and a connecting unit, and a damping middle seat is fixedly installed at the top of the anti-sedimentation lower plate. According to the internal waterproof, dustproof and anti-sedimentation device used during elevator installation, through cooperative use of a rotating stud, a connecting hollow column, an adjusting supporting column, a reinforcing hollow column and a water feeding stone rod, the adjusting supporting column can ascend and descend, in this way, during installation, the position of an anti-sedimentation lower plate can be adjusted according to the installation position, and the installation efficiency is improved. The situation that after the anti-sedimentation supporting columns are inserted into the ground, the anti-sedimentation lower plate inclines due to different foundation hardness is reduced, then the levelness of the anti-sedimentation lower plate during installation can be increased, and underground accumulated water can be subjected to water absorption treatment through the arrangement of water feeding stone rods and water feeding stone plates.

The present application belongs to the technical field of foundation construction, and in particular to a coastal soft soil vacuum preloading foundation treatment and protection structure, which comprises a positioning frame, a barrier plate and a cover plate. The bottom of the positioning frame is provided with a plurality of first ground nails, and the positioning frame is provided with a positioning slot. The barrier plate is inserted into the positioning slot. The left and right sides of the barrier plate are provided with side slots, and the inside of the side slots is provided with a sealing plate. The bottom of the cover plate and the sealing plate are provided with an extrusion mechanism, which can drive the sealing plate to extend outside the barrier plate. Through the cooperation of the above structure, a plurality of barrier plates are inserted into the ground around the reinforced area to form a continuous hard protection. The sealing plates on both sides of the barrier plate are extended outward, and a certain seal is formed at the gap. Thus, the reinforced area and the external area are blocked. Not only is the vacuum suction force prevented from extending to the outside of the reinforced area to cause harm to adjacent buildings, but also the vacuum suction force of the reinforced area is more focused, improving the adsorption and discharge capacity of pore water.

The embodiment of the invention provides a stack packaging structure and a preparation method of the stack packaging structure, and relates to the technical field of chip packaging, the stack packaging structure comprises a wiring substrate, a structural chip, an adapter plate, a double-layer solder ball and a plastic package body, the double-layer solder ball is adopted, and a plurality of first supporting wire arcs are additionally arranged on a first bonding pad, so that the structure chip is not damaged; the first support wire arc is embedded into the outer coating layer, so that the bonding strength of the outer coating layer and the first bonding pad is greatly improved, the welding strength is effectively improved, and the bridging or pseudo soldering risk caused by substrate warping is reduced. And the solder of the outer coating layer is distributed more uniformly, and bridge connection caused by excessive overflow is avoided. Meanwhile, due to the supporting effect of the first supporting line arc, the inner core ball can be supported, the collapse phenomenon of the welding ball in the conventional technology is effectively relieved, the plastic package space is increased, and the plastic package hole phenomenon is relieved.

This invention relates to the field of coal mining and subsidence control, specifically to a method for mitigating mining subsidence by injecting water into the floor strata to induce arching and reduce subsidence. The method includes determining the extent of the floor failure zone below the coal seam, selecting a certain thickness of strata below the failure zone as an isolation and protection zone, and establishing a water-injection expansion zone below the isolation and protection zone. The adjacent strata are non-swellable when exposed to water. Directional boreholes are drilled in the working face roadway, with the horizontal section of the borehole located within the water-injection expansion zone. After the working face passes a certain horizontal section of the directional borehole but before reaching its opening, high-pressure water is injected into the borehole. The injection pressure is then reduced, and the injection volume is controlled to reach the water absorption limit of the expansion zone. This invention causes the floor strata to expand by injecting water, thereby lifting the floor strata to support the goaf, reducing the subsidence of the overlying strata, and controlling surface subsidence. This invention achieves subsidence reduction solely through water injection expansion, resulting in low cost and environmental friendliness.

The utility model discloses an assembly interlocking type sidewalk base layer precast block, the top surface and the bottom surface of the precast block are rectangles which are the same in size and parallel to each other, and the top surface of the precast block horizontally rotates by 90 degrees to form the bottom surface of the precast block; the four side surfaces of the precast block are trapezoids with the same size; for the two opposite side surfaces of the precast block, the length of the top edge of the trapezoid is smaller than that of the bottom edge, and the trapezoid inclines towards the inner side of the precast block to form inward inclined faces. For the other two opposite side surfaces, the length of the top edge of the trapezoid is larger than that of the bottom edge, and the trapezoid inclines towards the outer side of the precast block to form an outward inclined face. The arrangement, digging and maintenance construction of the precast blocks are simple and quick, and the precast blocks can be repeatedly used, so that the traffic can be quickly opened, and the interference to the surrounding traffic and environment is reduced.

The invention relates to the technical field of calcium carbonate powder modification, and provides a surface modification method of environment-friendly calcium carbonate powder. The method comprises the following steps: S1, pretreating calcium carbonate powder, and removing impurities and enhancing surface activity through ultrasonic dispersion and acidic pretreatment; s2, mixing a plant source coupling agent with deionized water according to a ratio of 1: 10, heating to 30-50 DEG C, and adjusting the pH value to 5.0-6.0 to form a coupling solution; s3, stirring and mixing the pretreated calcium carbonate powder with a coupling solution according to a ratio of 1: 1; s4, the modified calcium carbonate powder is washed with deionized water until washing liquor is colorless, redundant coupling solution is removed, the calcium carbonate powder is placed in a drying oven to be dried, and a tannic acid coupling layer is stably attached. The plant source coupling agent and the water-based treating agent are adopted to effectively replace an organic solvent coupling agent commonly used in traditional modification, emission of volatile organic compounds is reduced, environmental pollution in the production process is remarkably reduced, the requirements of environmental protection laws and regulations and sustainable development are met, and negative effects on an ecological system are remarkably reduced.

The present invention relates to the technical field of highway thickness detection, and specifically provides a highway thickness detection coring device, comprising a frame, on which a coring cylinder, a driving assembly, a propulsion assembly and a pulling assembly are arranged. The driving assembly drives the coring cylinder to rotate, the propulsion assembly pushes the coring cylinder to move up and down, and the pulling assembly can make the force on the coring cylinder more uniform, reduce the fluctuation in the sampling process of the coring cylinder, thereby improving the sampling accuracy and also extending the service life of the coring cylinder. A scraping block is arranged on the side wall of the coring cylinder, and the scraping block enables the coring cylinder to scrape the side wall of the hole drilled by the coring cylinder into a wavy shape during the sampling process, so that when the hole is filled, the filler can be supported by the wavy side wall, thereby reducing the probability of sedimentation of the filler at the hole.

The utility model discloses a metal well lid capable of preventing settlement deformation, and relates to the technical field of metal well lids. The device comprises a cover plate and a mounting plate, the side face of the cover plate is fixedly connected to the side face of the mounting plate, a water inlet is formed in the top of the cover plate, and an anti-deformation device is arranged at the bottom of the cover plate; the anti-deformation device comprises an electric telescopic rod, and one end of the electric telescopic rod is fixedly connected to the bottom of the cover plate. Through the pushing force of the electric telescopic rod and the pushing rod, the hinge rod, the reinforcing block and other components in the anti-deformation device, the structural stability of the metal well lid is improved, the deformation or settlement phenomenon possibly occurring in the using process is reduced, the original shape and function of the well lid are kept, and the well lid is convenient to use. The manhole cover is prevented from sliding when vehicles or pedestrians pass by, the safety of the vehicles and the pedestrians is improved, and the service life of the manhole cover is prolonged.

The application discloses a method for delivering trace elements to anaerobic fermentation bacteria by coating additives, and the method comprises the following steps: mixing a biomass raw material to be treated and inoculated sludge in a fermentation tank; mixing hydrophobic nanosilica and a metal element ion salt solution, and stirring at a high speed to prepare a slow-release coating additive; adding the prepared slow-release coating additive into the fermentation tank; and setting a fermentation stirring rate to perform anaerobic fermentation. The method can not only gradually release trace metal elements under the action of stirring shear force to improve the biological availability of the trace metal elements, thereby being beneficial to solving the problem that part of the added trace metal element ions is precipitated by other anions in the process of being uptaken by microorganisms, but also can solve the potential heavy metal pollution problem in biogas residue; meanwhile, the method can also solve the biological toxicity problem caused by the prior art, and can effectively promote the anaerobic fermentation biochemical reaction pathway to improve the methane production.

The application discloses a kind of near vertical medium-thick, thick coal seam filling mining method, it is related to coal mine filling mining technical field.In near vertical coal seam, the working face that is arranged downward is carried out, and according to the depth of coal seam, the working face is divided into multiple mining stages;In the top and bottom of each mining stage, horizontal direction goaf strip is respectively constructed, and goaf strip is filled with high water-cement ratio cementing material to form artificial false roof and artificial false bottom;From artificial false roof, the working face is downwardly mined until artificial false bottom, forming the goaf of mining stage;The goaf is completely filled with low water-cement ratio cementing material;Repeat the step to realize the filling mining of entire near vertical medium-thick, thick coal seam.This method can solve the mining problem of near vertical medium-thick, thick coal seam coal resources, release the stagnant coal resources caused by complex occurrence conditions, and can effectively reduce strata movement and surface deformation.

The invention relates to water-based latex as well as a preparation method and a construction method thereof, and belongs to the technical field of sealing materials. The main film-forming substance in the water-based latex is the styrene-butadiene latex, a layer of compact styrene-butadiene rubber film can be formed after curing, and the film-forming effect is achieved. Hydroxyethyl cellulose plays a crucial role in latex, and the hydroxyethyl cellulose can act with latex particles due to good emulsification and suspension properties, so that the particles can be uniformly dispersed in the latex. In addition, the hydroxyethyl cellulose can also reduce the occurrence of a sedimentation phenomenon and promote the emulsion to maintain the form and the stability of the emulsion. The water-based latex product which is stable in form, low in gas content and not prone to deterioration can be formed by adding the defoaming agent and the degerming agent through the synergistic effect of the raw materials. After being used, the sealant can form a compact rubber film layer, has excellent sealing performance, can effectively block the permeation of gas and moisture, has a good film-forming effect, has good leveling property during spraying construction, and is not easy to have a sagging phenomenon.

The invention relates to the technical field of data processing, in particular to a coal mine building foundation settlement monitoring and early warning system based on an intelligent sensor, which comprises a processor and a memory, the method comprises the following steps: acquiring an initial threshold value of any monitoring index at any monitoring point of a target coal mine building at the current moment; obtaining a target environment index of which the environment data exceeds the limit, and performing adaptive adjustment on the initial threshold according to the influence of the data change of each target environment index on the monitoring data of any monitoring index and the data change condition of any monitoring index in a local time range up to the current moment, according to the method, the self-adaptive threshold value of any monitoring index at any monitoring point at the current moment is obtained, monitoring and early warning are carried out on the foundation settlement risk of the target coal mine building at the future moment according to the self-adaptive threshold value of each monitoring index at each monitoring point, and the early warning accuracy is improved.

The application relates to the technical field of building deviation rectification, in particular to a building deviation rectification method, which comprises the following construction steps: excavating a foundation pit, implanting reinforcing piles, installing a monitoring system, implanting a steel pipe group, water flushing for deviation rectification, adding a steel reinforcement cage and first foundation maintenance, so that the damage to the original structure of the building in the deviation rectification process can be reduced, and the deviation rectification process of the building can be simplified.

The application relates to the technical field of building materials, and particularly discloses a kind of nanometer materials for wall cable trench cavity water stop and a preparation method thereof, which comprises the following raw materials in parts by weight: sebacic acid 5-10 parts, acrylic acid 50-70 parts, olivine powder 10-20 parts, magnesium aluminum silicate 10-20 parts, calcium acrylate 20-30 parts, aluminate coupling agent 1-2 parts, curing agent 1-2 parts, coagulant 1-2 parts, water reducing agent 1-2 parts, modified additive 1-2 parts, deionized water 30-40 parts, ammonium persulfate 0.5-1 part. The modified additive has phosphorus, silicon, fluorine elements and long-chain alkyl on the molecular structure, and the modified additive and other raw materials significantly improve the flame retardance, compressive strength, chemical stability and waterproof performance of the nanometer material for wall cable trench cavity water stop through synergistic effect. Meanwhile, the modified additive also reduces the agglomeration phenomenon among raw materials, ensuring that the nanometer material has good strength and water plugging effect.

The invention discloses a preparation device of magnetite powder suspension liquid and a dust removal system, belongs to the technical field of coal dust removal, and aims to solve the problems that the preparation device of the magnetite powder suspension liquid in the prior art is complicated in structure, and the magnetite powder suspension liquid settles in the conveying and filtering processes. The preparation device comprises a stirring barrel, a stirring impeller, a water inlet pipe, a mineral powder feeding opening and a liquid supply pipe, the stirring impeller is arranged in the stirring barrel and located at the bottom of the stirring barrel, the water inlet pipe is communicated with the interior of the lower portion of the stirring barrel, the water inlet direction of the water inlet pipe is in the tangential direction of the stirring barrel, the mineral powder feeding opening is formed in the top of the stirring barrel, and the liquid supply pipe penetrates through the top of the stirring barrel and extends below the liquid level of the stirring barrel. The device can be used for coal dust removal.

The invention discloses biomass-derived carbon aerogel with a skeleton genetic structure as well as a preparation method and application of the biomass-derived carbon aerogel. The preparation method of the biomass-derived carbon aerogel with the skeleton genetic structure comprises the following steps: a) hydrogel treatment: carrying out hydrothermal treatment on porous biomass to obtain biomass hydrogel; b) carrying out aerogel treatment: freezing the biomass hydrogel into biomass frozen gel, and sequentially carrying out solvent exchange treatment and drying treatment on the biomass frozen gel to obtain biomass aerogel; c) performing carbon aerogel gelatinization: performing carbonization treatment on the biomass aerogel to obtain the biomass carbon aerogel, and the prepared carbon aerogel not only can reserve the original excellent skeleton structure of biomass, but also is mild in preparation condition, simple in preparation process and low in preparation cost.

The invention provides a non-settling and non-precipitation colored electrophoretic coating and a preparation method thereof, and belongs to the technical field of electrophoretic coatings. The invention discloses a non-settling and non-precipitation colored electrophoretic coating which comprises the following components in parts by weight: 30-45 parts of waterborne polyurethane resin, 8-12 parts of polyether polyol, 2-4 parts of zinc dihydrogen phosphate, 5-20 parts of filler, 1-2.5 parts of a catalyst, 1-3 parts of a phthalate coupling agent, 8-20 parts of color paste and 5-30 parts of deionized water. The color paste is prepared from the following components in parts by weight: 15 to 35 parts of modified acrylic resin, 10 to 25 parts of azole silane modified pigment, 5 to 10 parts of cardanol polyoxyethylene ether and 20 to 40 parts of deionized water; the invention also provides a preparation method of the colored electrophoretic paint. The colored electrophoretic paint provided by the invention has excellent storage stability, and is free from precipitation; the cured coating has high hardness and high adhesive force, has excellent water resistance, wear resistance, chemical resistance, corrosion resistance and the like, is uniform in color, and prolongs the service life of the colored electrophoretic paint.

The invention discloses a preparation method of a BOPP composite shrink film, and relates to the technical field of packaging materials, the BOPP composite shrink film comprises an outer layer, a base layer and a heat sealing layer; the outer layer comprises composite antibacterial particles, a liquid coupling agent, an antioxidant, a dispersing agent, a heat stabilizer, metallocene co-polypropylene, smooth master batch and POE; the base layer comprises polypropylene, a stiffening master batch and an antistatic master batch; the stiffening master batch comprises a mixture of hydrogenated petroleum resin and homo-polypropylene; composite antibacterial particles; the heat-sealing anti-sticking layer is prepared from polypropylene and titanium dioxide anti-sticking master batch; the toughness of the film can be improved, the composite antibacterial particles are uniformly distributed in the two layers, a more uniform antibacterial layer is formed, and the situation that the antibacterial effect is too strong or too weak locally is avoided, so that the overall antibacterial efficiency is improved.

The invention discloses a mining method for grade-divided pseudo-inclined mining, separation, separate filling and gently inclined medium-thick phosphorite, and relates to the technical field of underground mining of non-metal ores, the mining method comprises the following steps: dividing an ore body, and arranging along the trend of the ore body in a segmented and middle-section manner; mining preparation cutting is conducted, a middle-section haulage roadway, an air return roadway and a connection roadway are arranged, tunneling cutting is conducted to go uphill, and crushing and sorting equipment is integrated; pseudo-inclined grade-divided layered stoping is carried out, differential ore breaking is carried out through horizontal shallow holes in the upper layer and fan-shaped medium-length holes in the lower middle portion, and combined supporting is matched; partitioning and grading filling, retaining wall and water filtering system building, tailing reuse bottoming, and strip chamber and pillar differential lime-sand ratio filling; and finally, fully mining and fully filling the chambers and the pillars in sequence. The mining method provided by the invention can improve the ore resource recovery rate of gently inclined phosphorite, reduce the dilution rate, improve the mining efficiency, enhance the safety, reduce the production cost, promote environmental protection and the like, and has important significance for efficient, safe and environment-friendly mining of gently inclined phosphorite resources in China.

The invention relates to an inverted siphon pressure steel pipe mounting device and a using method thereof. The inverted siphon pressure steel pipe mounting device relates to the technical field of steel pipe mounting. The inverted siphon pressure steel pipe installation device comprises a sleeve part, settlement adjusting parts, an upper connecting plate and a lower embedded part, the sleeve part is installed on the outer ring of an inverted siphon pressure steel pipe in a sleeving mode and used for fixing the inverted siphon pressure steel pipe, and the settlement adjusting parts are vertically distributed; when the settlement phenomenon of the inverted siphon pressure steel pipe is monitored, the distance sensor feeds back the monitored information to the controller arranged at one end of the power mechanism, the controller controls the power mechanism to inflate the corresponding pressure cavity, and the lifting rod lifts the inverted siphon pressure steel pipe to rise after inflation, so that the height of the inverted siphon pressure steel pipe is recovered; the problem of sedimentation is solved.