242 results about "Quincunx" patented technology

The invention discloses a construction method of a high-tension water-rich extra-large-section weak breccia tunnel. The method includes the steps of exploring distribution of fault weak breccia in front of a tunnel face by an advanced geological forecast method; distributing L-shaped gradient drain holes in two inner sides of the tunnel, providing sector drain holes and grouting holes, and allowing upper grouting and lower drainage; providing a combined cylinder grout-stopping wall, and performing a full-face advanced chemical grouting consolidation; constructing an advanced long tube shed with a circumferential closed advanced tube shed guide wall having a foundation, distributing tapered quincunx examining drain holes to detect grouting effect, and finally excavating the tunnel. Through the use of the techniques such as three-layer stereoscopic grouting and drainage, and cement-water glass and epoxy resin sequential grouting, the problem that a high-tension water-rich surrounding rock area with loose weak breccia has ineffective grouting consolidation and non-obvious water plugging effect is solved.

The invention relates to a deep-hole and shallow-hole combined bench blasting method capable of reducing blasting boulder rate. The method comprises the following steps of: 1) drilling boreholes on the bench of a blasting area through a triangular or quincunx-shaped hole arrangement method according to open deep-hole bench blasting design and requirements to obtain deep holes; 2) drilling a shallow borehole with hole diameter being less than or equal to 50mm in the middle between every two deep holes in the same row to obtain shallow holes; 3) respectively charging the deep holes and the shallow holes, laying initiating explosive cartridges and blocking the mouths of the deep holes and the shallow holes; and 4) conducting row-to-row sequential short-delay initiation according to initiation sequence in design requirements and blasting in one step. The deep-hole and shallow-hole combined bench blasting method capable of reducing blasting boulder rate has the advantages that the problem of high boulder rate of blocked sections in a deep-hole bench blasting method is solved, the blasting effect is improved, the subsequent excavating and loading efficiency is improved, the engineering progress is accelerated and the engineering cost is reduced.

The invention discloses process for manufacturing quincuncial dowel screws. The process mainly includes steps: (1) cutting; (2), double chamfering; (3) preliminary heading and tail binding; (4) quincunx binding and forming; (5) thread rolling; (6) heat treatment; and (7) surface treatment. The process for manufacturing quincuncial dowel screws has the advantages that an integral processing procedure is divided into a plurality of working procedures, a blank is in cold heading processing to form a product, generated waste materials are avoided in the processing procedure, processing speed and efficiency are high, cost is effectively controlled, labor intensity of personnel is reduced, and the quality of the product can be reliably guaranteed.

The invention relates to a building construction method, in particular to an outboard template construction method of a post-pouring belt of an outer wall of an underground structure, which comprises the following steps of: freely taking steel bar wastes produced in a construction site, binding a precast slab reinforcement cage in a single-row two-way binding way, wherein the width is more than that of the post-pouring belt and the length is 1 or 1.2 m; after the reinforcement cage is bound, binding a fixed precast slab steel wire at the intersection of transverse and longitudinal steel bars, wherein the extension length of the steel wire is 400-500 m and the binding position of the steel wire is arranged in a quincunx way; using a 5*10 mm or 10*10 mm wood beam as a precast slab template; after the reinforcement cage is bound and formed and the template is supported, pouring precast slabs when residue concrete is provided on site, wherein the thickness is 50 mm; and when an excessive trough is backfilled, binding the precast slabs on the steel bar of the post pouring belt by using a preserved steel wire, and stacking the precast slabs on the vertical surface of the outer wall one by one. The invention is convenient and simple, saves time and labor, and enables the steel bars and the concrete to be fully utilized, thereby reducing the waste and saving the cost.

The invention relates to a reinforcement method for a transmission tower shallow base foundation under a composite soft soil foundation. A cement-soil mixing pile composite base is adopted for reinforcement, and the foundation reinforcement method comprises the following steps: (1) pile positions are distributed on the soft soil foundation in the form of square or quincunx distribution mode, and the pile diameter, pile length and pile spacing are determined; (2) pile holes are drilled in the base foundation, cement slurry is injected into the pile holes to form cement piles, and anchor bars are arranged in the cement piles within 2 hours after the cement piles are finished; (3) a mattress cushion layer is paved on the treated foundation, and the anchor bars extend out of the mattress cushion layer; (4) a flexible platy foundation is mounted on the mattress cushion layer, the anchor bars in the cement piles are welded with the main bars of the flexible platy foundation, and the flexible platy foundation is used as a bearing layer. Compared with the flexible platy foundation reinforcement or bored pile reinforcement, the reinforcement method not only can meet the design requirements, extend the application range of shallow foundation, but also can reduce the total cost and have remarkable economic benefits.

The invention relates to the technical field of floor system and roof system construction of large-span architectural engineering, in particular to a large-span pipe truss hoisting method. The large-span pipe truss hoisting method comprises the following steps that step one, measurement and re-examination are carried out; step two, arc-shaped steel column segment and circumferential truss hoistingis carried out; step three, temporary operation platform installation is carried out; step four, main truss bed-jig assembly is carried out; step five, main truss hoisting is carried out, and specifically, a quincunx integral hoisting method is adopted in super-long plane main truss horizontal segment steel beam hoisting; and step six, end portion arc-shaped segment secondary truss and truss hoisting is carried out. A loading feature of higher rigidity of element itself in a plane is fully used, installation errors and accumulative errors generated during truss segment installation of the large-span prestress tool orthogonal plane pipe truss system can be effectively solved, construction technology of a quincunx integral hoisting super-long tool orthogonal plane pipe truss is adopted, andthe problems that the rigidity is higher but out-of-plane rigidity is relatively weak, and element overall deformation is nonuniform in the hoisting processing of a plane truss are solved.

The invention discloses a cold press forming technology for a high-strength aluminum alloy cinquefoil deep blind hole piece, which relates to the press forming technology of the high-strength aluminum alloy piece, in particular to the press forming technology for the high-strength aluminum alloy cinquefoil deep blind hole piece made of the material with brand 7A04; the steps of the technology comprise blanking of a bar machine, annealing treatment before pressing and superficial oxidation and lubrication treatment, compound pressing of upper and lower round holes, pressing of cinquefoil hole, solid solution treatment, aging treatment and machining shape. The invention has the advantages that the productivity is high and the cost is low; moreover, the product quality is high, especially the size precision and the location precision of the cinquefoil hole can be ensured by the mold to meet the technology requirements; therefore, deep blind hole piece can be suitable for the mass production.

The invention provides a method for recovering vegetation in a rock-soil residue field, comprising the following steps: 1) removing unstable rocks and sundries on the residue stack and maintaining a certain degree of smoothness; 2) anchoring thread steel arranged in quincunx into the residue stack and pouring anchoring agents for fixation; 3) preparing a compound of vegetable fibers and bentonite;4) paving the compound obtained in the step 3) on the surface of the residue stack and compacting the compound; 5) spreading and hanging galvanized wire meshes along the grade surface and binding themeshes with tie wires and fixing the meshes on the thread steel; 6) preparing seed matrix mixtures; 7) spraying the seed matrix mixtures; and 8) spreading and hanging non-woven fabrics and watering and managing the fabrics. The method features reasonable cost, simple construction technology, stable structure of the vegetation in the rock-soil residue field during recovery and good water retention, and can effectively recover the vegetation. The method is mainly used for recovering the vegetation in the rock-soil residue field.

The invention provides an optimization and recombination method for a well network of in-situ leaching uranium mining. The method comprises the steps that when the uranium concentration of leachate of a certain leaching mining units of a well site mining area is 3-10 mg / L, or the leaching rate reaches 60%-75%, the positions of liquid extracting wells and liquid injecting wells are adjusted; the injecting wells at the boundary of the mining area are not adjusted to be extracting wells, and it is guaranteed that wells on the periphery of the mining area are all the injecting wells; when a well type is a quincunx type, the adjacent extracting wells are connected into straight lines, the adjacent injecting wells are connected into straight lines, the original extracting wells are changed into injecting wells, the original injecting wells are changed into extracting wells, and it is guaranteed that the well type after adjusting is still the quincunx type; and when the well type is a seven-point type, the extracting wells are connected into lines, the two injecting wells are located between every two extracting wells, translation is conducted in the same direction of the straight lines, after translation, the original extraction wells are changed into injecting wells, the adjacent injecting wells along the straight lines are changed into extracting wells, and it is guaranteed that the well type after adjusting is still the seven-point type. The optimization and recombination method is a secondary stoping method improving the leaching rate of the uranium resource and solves the problem that through a fixed well type, leaching dead angels exist at the time of leaching, so that the resource leaching rate is low.

The invention relates to a concrete panel void repairing method. The purpose is to improve the efficiency of concrete anti-leakage panel void repairing and enhance the safety and reliability of engineering operation. According to the technical scheme, the method includes the steps that a, void region detection is performed, LTD ground penetrating radar is adopted for detecting a panel void region and determining the panel void region, and void depth information is collected; b, grouting hole positions are arranged inside the panel void region, the distance d1 between grouting holes is equal to 2 m-3 m, the row distance d2 is equal to 2 m-4 m, and quincunx-type arrangement or rectangular arrangement can be performed; c, drilling is performed according to the arrangement of the grouting hole positions; d, grouting starts to be performed upwards step by step from the lower portion of a panel in the grouting process; e, after two hours from grouting, cement mortar is adopted for plugging the grouting holes, the plugging height is larger than the height of the panel by about 3 mm-5 mm, and the surface of the panel is polished to be flat after standing for about 8 hours; f, in hot weather, water should be sprayed to the void repairing region for maintenance.

The invention discloses a firm structure for preventing and controlling freeze-thaw collapse of a side slope in a cold region and a construction method for the firm structure. An arch framework is paved on the surface of the side slope; a slope toe wall is arranged at the bottom of the side slope; a plurality of drain pipes are arranged in each arch ring of the arch framework in a rectangular array or quincunx array mode; a plurality of drain holes are formed in each drain pipe; the outer wall of each drain pipe and the end of each drain pipe, which stretches into a soil body of the side slope, are coated with dense gauze; and a heat preservation structure is arranged on the bottom surface and the side wall of the slope toe wall and the surface of the side slope at certain depth. Groundwater can be effectively drained, groundwater level, the water content of the side slope and water migration rate are reduced, the stability of the side slope is ensured, and engineering cost is greatly reduced; through the heat preservation structure, the freezing depth and frost heaving thaw collapse amount of the side slope can be effectively reduced, and the engineering cost can be effectively reduced; and through the arch framework, the infiltration of surface water, and the scouring of the surface of the side slope due to melted snow, rain and the like are reduced, so that the width, depth and length of a lower layer crack are reduced, and the surface of the side slope is protected.

The invention relates to a light bolt fastening piece applied to aerospace. The generatrix of the transition part of the light bolt fastening piece is designed into a smooth curve similar to a sinusoid, the conical section slant angle of the transition part is relatively small, the transition part is relatively short, and the structure is relatively reasonable; the twist moment of a hexangular quincunx twist hole in the tail part of a bolt is larger, and the twist hole is relatively short, as a result, the mounting is facilitated, the length of the overall bolt is reduced, and a role of lightening is played; by using the mold of a light bolt transition vehicle-roll R, the week part of the transition part is ingeniously strengthened, the mold of a roll R is simple, the cost is low, the operation is simple and convenient, and the efficiency is higher; a twist pin matched with a light bolt fastening part for use can bear larger twist moment compared with a hexagonal twist pin, the length of the twist pin is further reduced, and the service life of the twist pin is prolonged.

The invention discloses a Raymond mill which comprises an engine base, wherein a cylinder is connected to the top surface of the engine base; a grinding ring is arranged in the engine base; a main shaft which stretches into the cylinder is rotationally connected to the engine base; a quincunx rack is connected to the main shaft; multiple sets of grinding roller assemblies are hinged on the quincunx rack; each grinding roller assembly comprises a grinding roller shaft hinged on the quincunx rack and a grinding roller arranged on the grinding roller shaft; a classifier is arranged on the top of the cylinder; a classification roller of the classifier is positioned on the top of an inner cavity of the cylinder; the wall surface contour line of the inner wall surface in the longitudinal section view of the grinding ring is an outwards convex arc; and the side contour line of the outer side in the longitudinal section view of each grinding roller is an outwards convex arc. A product produced by the machine is fine, and the Raymond mill is suitable for production of ultrafine powder.

Disclosed is a plum blossom shape wire-unloading device used in steel wire production, which comprises a trunk frame, an upper rotary table, a wire cover, a wire frame and a lower rotary table, the upper rotary table is mainly composed of a fixed seat, a bearing and a rotating disc, a take-up stand is positioned on the lower rotary table, the lower rotary table is driven by a variable-frequency motor, the upper rotary table is connected with the trunk frame and falls on the upper end of the wire frame, the wire frame is placed on the lower rotary table, and an eccentric distance is retained between the center of rotation of the wire frame and the center of the upper rotary table for realizing the plum blossom shape taking-up and paying-off of steel wires. The lapped steel wires will not slide off and foul up easily through the device, the pay-off speed of the next procedure is increased, and the gross weight of the plum blossom shape take-up wires can be increased by 30 percent on the wire frame with the same size.

The invention discloses a method for leveling land according to soil layer thickness. The method includes the following steps that firstly, a plurality of probe points are selected from a land region according to the cross interval method or the s-shape method or the quincunx and diagonal method or the chessboard method, wherein elevation differences exist between the probe points; secondly, the soil layer thicknesses are measured, namely, the thicknesses of spaces between the probe points and a gravel layer or a bed rock layer are measured according to the soil profile digging method or the soil drilling method or the ground penetrating radar method and are the soil layer thicknesses; thirdly, the land is leveled, wherein the gradient of the leveled land is smaller than or equal to 0.5%. The profile of soil is detected, the land is leveled according to soil layer thickness general investigation and exploration results to ensure that the soil layer thicknesses meet land engineering construction standards and corn growth requirements, and the earthwork transfer workload is reduced.

The invention discloses a method for treating the soil pollution in a hierarchically cyclic cleaning manner. According to the method, water seepage / water collection pipe networks are hierarchically arranged on the earth surface and under the earth and work together with a water injection system and a sewage treatment system, which are arranged on the ground, to clean polluted soil hierarchically and sequentially from top to bottom until all of the soil with the pipe networks are completely cleaned to reach the ruled standard. If the deep soil layer 5 meters under the ground still has pollutants required to be cleaned away, a quincunx-shaped silo can be used for extracting the polluted water, and the lowermost layer of water seepage / water collection pipe network is used for filling clean water. The depth of the silo is set according to a demand that the silo reaches a non-permeable layer. Separated heavy metals and pollutants can be recycled and treated into harmless resources. According to the method, the shortcomings of the conventional treatment method are fundamentally overcome; furthermore, equipment is small in investment and high in cleaning efficiency and can thoroughly clean the pollutants; and the method is extremely good in popularization and application prospect.

A multi-size wrench is defined with an engaging hole in a head thereof, and an inner surface of the engaging hole of the head is formed by six arc-shaped engaging concaves and six arc-shaped connecting convexes which are alternatively connected to each other in such a manner that between each two neighboring engaging concaves is connected a connecting convexes. An angle between the connecting lines from two ends of the respective arc-shaped engaging concaves to the center of the engaging hole is 50 degrees, and an angle between the connecting lines from the center of the engaging hole to a middle connecting point of each arc-shaped connecting convexes and to a connecting end of the connecting convex is 5 degrees. By such arrangements, the multi-size wrench is applicable to a Metric hexagonal fastener, an English hexagonal fastener and a torx fastener which are correspondingly sized.

The invention discloses a novel spanner capable of replacing the wobblers of the spanner. The novel spanner comprises a slave box sleeve, a master box sleeve and a handle connected to the master box sleeve. The master box sleeve is used for fixing the slave box sleeve, the master box sleeve is composed of two semi cylinders, a joint hinge, a hinge supporting base, a hinge pin, a hinge screw, a compression nut and compression pieces. The slave box sleeve comprises a fixing ring with a same diameter as that of a circle made of the two semi cylinders, a quincunx-shaped through hole A and a quincunx-shaped through hole B are connected to two ends of the fixing ring correspondingly, the diameter of the quincunx-shaped through hole A is larger than that of the quincunx-shaped through hole B, ratchets are arranged on the surface of the fixing ring, and the fixing ring of the slave box sleeve is fixedly connected to the position between the semi cylinders of the master box sleeve. A through hole is formed in the handle, the through hole is connected with a locating key through a hinge pin, the locating pin comprises an upper groove, gears for clamping the ratchets are arranged on both sides of the groove, and raised grooves for capable of moving the spanner are arranged besides the gears.

The invention relates to a method for reinforcing a round-section pier, in particular to the method for reinforcing the round-section pier by using polyurethane concrete materials and thin-wall steel sleeves. The method needs to solve the problem that in an existing frequently-used bridge reinforcing technique, the interface strength is insufficient, internal damage gaps can not be densely packed, the construction is tedious, the construction period is long, and the tensile strength and compressive strength of a component can not be improved at the same time. The method includes the following steps that a mortar layer on the surface of concrete on a concrete pier reinforcing part is chiseled away, and cleaning and drying are then conducted; connecting rebars are implanted in the concrete pier reinforcing part, and then welding shear nails are arranged according to the quincunx in semicircular thin-wall steel sleeves; every two of the semicircular thin-wall steel sleeves with the welding shear nails are oppositely welded to form the thin-wall steel sleeves on the surface of the concrete pier reinforcing part, the polyurethane concrete materials are prepared and poured in the thin-wall steel sleeves, and curing is conducted under natural conditions. The method is used for reinforcing the round-section pier by using the polyurethane concrete materials and the thin-wall steel sleeves.

The invention discloses a foldable-type tent, which is characterized in that: supporting rods can be adequately unfolded to resist the influence of an external force, the foldable-type tent is easy to set and to fold and consists of a bracket and a tent cloth, wherein the bracket comprises a main hinge and a plurality of supporting rods, the main hinge consists of an upper cap, a compression spring, a quincunx wheel, a lower cap, a main force arm and a push rod, the upper cap is connected with the lower cap, the quincunx wheel is arranged inside an inner cavity which is formed by the upper cap and the lower cap, one end of the compression spring is connected to the upper cap, the other end of the compression spring is connected with the quincunx wheel, the middle part of the lower cap is provided with a through hole, a slide shaft is arranged below the quincunx wheel to pass through the through hole, a clamping groove is arranged at the side of the through hole, the quincunx wheel is provided with a clamping block, one end of a lever device is attached to the slide shaft and is arranged below the clamping block, the other end of the lever device is a pressing end, a pivot is embedded inside the clamping groove, one end of the main force arm is connected with the supporting rods, the other end of the main force arm is hinged with the edge of the upper cap, one end of the push rod is hinged with the quincunx wheel, and the other end of the push rod is hinged with the main force arm.

The invention discloses a high-strength light photoelectric composite cable for an offshore oil drilling platform, comprising a quincunx frame. Axial mounting holes are arranged in the edge and centerof the quincunx frame. Power line cores and control line cores are arranged in the mounting holes in the edge of the quincunx frame, and the power line cores and the control line cores are alternately arranged. Stainless steel tube fiber units are arranged in the mounting hole in the center of the quincunx frame, and a shielding layer is arranged at the periphery of the stainless steel tube fiberunits. A reinforcing layer, a water blocking tape and an outer protective layer are arranged in turn outside the quincunx frame. The quincunx frame is made of chloroprene rubber, which makes the overall structure of the cable stable and the process simple. With combination of the water blocking layer and the outer protective layer, the cable has excellent waterproof performance, the outer protective layer is highly resistant to wear and tear, the cable is resistant to oil, acid and alkali and seawater corrosion and can be continuously used in sea water, and the cable is light and easy to fix.

The invention discloses a method for eliminating loess foundation collapsibility through microwave heating. The method includes the steps that firstly, a processing area is determined, and according to collapsible loess area building standards, the plane processing range and the processing thickness of a collapsible loess foundation are determined; secondly, drilling is carried out, soil around drilled holes is heated through microwave irradiation, an engineering geological drilling rig is adopted for drilling, the depth of the drilled holes is the same as the processing thickness of the collapsible loess foundation, and the drilled holes are distributed in a quincunx shape, a rectangular shape or a cuboid shape; in the drilling process, after each drilled hole is formed, the soil around the drilled hole is heated through microwave irradiation in a segmented mode from bottom to top by means of a microwave heating device; thirdly, the drilled holes are filled with cohesive soil, and layered compacting is carried out. The method is simple in step and convenient to implement, can effectively eliminate collapsibility of the collapsible loess foundation, and is wide in application range, free of pollution, easy to control in site, high in practicality, good in use effect and convenient to use and popularize.

The invention discloses a straight abutment implant system based on titanium zirconium alloy. The straight abutment implant system comprises an implant, an artificial tooth abutment and a central bolt, wherein the two ends of the artificial tooth abutment serve as a dental crown connection section and an implant insert section; the implant insert section is formed by a first frustum, a quincunx column and a second frustum which are coaxially connected; the dental crown connection section is connected with the large-diameter end of the first frustum, the small-diameter end of the first frustum is connected with one end of the quincunx column, and the other end of the quincunx column is connected with the large-diameter end of the second frustum. According to the straight abutment implant system based on the titanium zirconium alloy disclosed by the invention, the implant is of a dual-thread structure that a main thread and a secondary thread are combined to effectively reduce harm to alveolar bone; as generated cutting resistance is small, the problems of bone burn, stress concentration, micro crack initiation at grooved positions and the like are effectively solved.

The invention discloses a quick dredger fill consolidation device. The quick dredger fill consolidation device is composed of at least one well point pipe, a transverse drainage pipe, a transverse air compression pipe, a vacuum pump and an air compressor. The well point pipe is composed of an inner pipe and an outer pipe which are arranged in a coaxial mode. The top of the inner pipe is connected with the air compressor through the transverse air compression pipe, and the top of the outer pipe is connected with the vacuum pump through the transverse drainage pipe. The inner pipe is provided with a cross-shaped hole, and the outer pipe is provided with a quincunx small hole. One end of a small pipe is welded to the cross-shaped hole, the other end of the small pipe penetrates the small hole, and the outer wall of the other end of the small pipe is welded to the small hole in a sealing mode. The quick dredger fill consolidation device is combined with the light well point dewatering characteristics, the double-pipe structure of the well-point drainage pipe is adopted, silt, floury soil and mud soil which are in a fluidal plastic state are subjected to quick consolidation, the consolidation time is shortened to 2-3 months from one year, and the consolidation time is greatly shortened; and meanwhile, the quick dredger fill consolidation device replaces the water filtering procedure of a plastic drainage plate, resource wasting and secondary environment pollution caused by the plastic drainage plate are avoided, recycling is achieved indeed, and benefits are brought to the nation and the people.

The invention provides a method for reinforcing a railroad bed of a salt lake by using saturated brine clay slurry, wherein a brine upward percolation channel with low degree of mineralization is filled by a grouting manner. The method specifically comprises the following steps: arranging a row of grouting holes in the shoulder of the railroad bed; respectively arranging two rows of grouting holes in positions which are 2cm away from the outsides of a slope toe and a berm, wherein the two rows of grouting holes are arranged in a staggered manner in quincunx shape, the interval between the every two grouting holes is 0.8-1.0m, and the distance between two rows is 0.5-0.6m; by taking the brine clay slurry as a grouting material, controlling the grouting pressure at 1.5-2.0MPa; grouting every other one hole; and when slurry is overflowed from the wall of a single hole, stopping grouting. According to the method provided by the invention, the brine clay slurry is adopted to grout, clay is quickly condensed in brine to fill the Karst caves of the salt lake bed, and clay is well contacted with rock salt surfaces to seal gaps of clay layers of the rock salt, so that brine with low degree of mineralization can percolate upwards so as to further reinforce the railroad bed of the salt lake, so that guarantee is provided for traffic safety of railways along the salt lake.

A screw bolt able to be turned by the manual tools different in size and type features that the peripheral edge of its bolt head is composed of two short straight edges and two long arc edges for adapting the different open spanner, and a recess made on the top surface of said bolt head has an edge consisting of 6 arc edges and 6 straight edges, which are alternative, for adapting to hexagon spanner and quincunx hexagon spanner.

The invention discloses a coal seam gas extraction technology on the ground, which includes a main body, and the main body includes a working vehicle, a working string oil pipe, an underground directional guide tool, a nitrogen generator, nitrogen gas, and a gas collection pipeline. The beneficial effect is: by using high-pressure mixed fluid as the working medium, jet cutting drilling, the rapid expansion of high-pressure bubbles "explodes" to generate continuous shock waves, so that the shock waves can strengthen the coal seam near the radial hole, improve the fluidity of the coal seam near the hole, and realize the Balanced drilling reduces the pollution to the coal seam during the drilling process; the supporting screen made of high-strength PVC material is inserted into the radial hole to support the diversion gas channel, and multiple radial holes form a plum-shaped radial hole. Increase the discharge area of ​​single well coal seam. At the same time, in the process of coal seam gas extraction, the pressure pumping technology is used to inject high-pressure nitrogen into the radial screen in the coal seam through the vertical shaft, dredge the supporting screen, and then extract nitrogen and coal seam gas through negative pressure on the ground.

The invention discloses a technology for planting lotus roots in a fish pond. The technology includes the following steps that (1) germination accelerating is conducted, and breeding lotus roots are stacked for accelerating germination; (2) the planting density is controlled, the sowing quantity per mu is 200-250 kg, wide and narrow row spacing is used for seed arrangement, the wide row space is 2.5 m, the narrow row space is 0.4 m, the distance between plants is 0.6 m, and the number of required bud heads is 200-400; (3) planting is carried out, seed arrangement is conducted at the end of February and the beginning of March, all the plants between the rows are arranged to be in a quincunx shape, the bud heads on the periphery face inwards, the phenomenon that lotus whips are inserted into the periphery of the fish pond is avoided, the remaining rows also face one side, the bud heads are inserted in mud in the planting process, and the tips protrude out of the water surface; (4) membranes are covered; (5) the membranes are uncovered, after the first ten-day period of May, the membranes are uncovered, ridges are removed, water is poured till the depth of water is 10-15 cm, fish excrement of 2000 kg and urea of 17 kg are subjected to top dressing per mu, and foliage spraying of boric fertilizer of 2 kg is conducted per mu; (6) harvesting is performed. According to the technology, the whole planting processes such as germination accelerating, planting, membrane covering and fertilizer applying are systematically controlled, the bud ratio, the growth rate and the survival rate of the lotus roots are effectively guaranteed, the quality of the lotus roots is good, the yield of the lotus roots is high and economic benefits are good.

The invention provides an exposed frame type low-wind-resistance scales curtain wall structure and a mounting method thereof. The exposed frame type low-wind-resistance scales curtain wall structure comprises a curtain wall sealing repair layer, a curtain wall adornment layer, first adornment plates and second adornments, the curtain wall sealing repair layer is mounted on the outer wall of a construction structure, and the curtain wall adornment layer is mounted outside the curtain wall sealing repair layer; the curtain wall adornment layer comprises a plurality of C-shaped scales frames with unified orientation and in interlocking quincunx layout, internal slots are arranged in internal openings of the C-shaped scales frames, external slots are arranged in external openings of the C-shaped scales frames, and the internal slots and the external slots are arranged in a high and low manner; the first adornment plates are embedded in the internal slots of the C-shaped scales frames, and the second adornment plates are embedded in the external slots of the C-shaped scales frames. By the arrangement of the height difference between the first adornment plates and the second adornment plates, wind resistance can be lowered, and on the other hand, curve-turning mounting of the curved walls can be realized.