8results about How to "Reduce subsidence" patented technology

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 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 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 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.