30results about How to "Control extension" patented technology

The invention provides an underground high-pressure hydraulic fracturing hole sealing material for a coal mine and a hole sealing technology. The hole sealing material comprises the following components by weight: 100 parts of cement, 2 to 4 parts of Ms type early-strength slushing agent, 0.08 to 0.5 parts of polypropylene fiber, and 60 parts of water. The hole sealing technology comprises the following steps in sequence: drilling a hole on a coal-rock mass; constructing until reaching the a top plate at a coal seam; expanding the hole to a bottom plate at the coal seam; feeding a grouting pipe to the bottom plate at the coal seam; arranging a grout returning pipe to the front end of a blocking section of a hole port; blocking the hole port section through AB adhesive and cotton yarn; feeding the hole sealing material into the hole through the grouting pipe; closing a check valve of the grout returning pipe after returning the grout through the grout returning pipe; continuously grouting; completely draining the grout in the grouting pipe once water flows form a fracturing hole; grouting at the second time after the grout is condensed; and finally solidifying. The underground high-pressure hydraulic fracturing hole sealing material for the coal mine has the advantages of being less in contraction, and high in compressive strength and impact toughness; the hole sealing material is high in sealing performance and resistance to high pressure under the effect of high-pressure hydraulic fracturing impact load; simultaneously, the hole sealing material is low in cost and the construction is convenient; and the hole sealing technology is simple, the hole sealing depth meets the requirement, and the success rate is high.

The invention discloses a backfill handling method for an activity subsidence area of a mine. The backfill handling method is characterized in that mixed slurry is prepared by mixing high-concentration tail mortar which is obtained by densely dehydrating low-concentration tail mortar through a deep cone thickener (1) with rough aggregates and concrete which are discharged by an aggregate silo (2) and a power silo (3) through a mixer (4); and the slurry is pumped to the subsidence area (6) through a pump (5) so as to be discharged. During the discharging, the subsidence area is backfilled by a discharging mode of plane partitioning staggering and vertical cement and non-cement interbedding; according to the plane partitioning staggering discharging, the subsidence area is divided into a plurality of independent discharging areas on a plane according to a spatial distribution state of the subsidence area, and the mixed slurry is discharged in the staggered manner according to different areas; and according to the vertical cement and non-cement interbedding discharging, cement backfill layers (7) and non-cement backfill layers (8) discharge the slurry in the staggered interbedding manner in the vertical direction of the subsidence area. The backfill method has the characteristics of low backfill cost, safety and reliability in backfill and the like.

The invention relates to a southern propagation and northern breeding method for plug seedlings of strawberries. The southern propagation and northern breeding method comprises the following steps: 1)breeding strawberries in a warm and suitable area in the south in spring to grow a great number of healthy creeping stems; and 2) transporting the creeping stems to a cold and suitable area in the north in summer, and breeding the creeping stems by using a plug seedling raising method until the creeping stems blossom and bear fruits. According to the southern propagation and northern breeding method, the creeping stems of the strawberries are propagated and bred by sufficiently utilizing the warm climate in a specific region in the south in spring, and then, blossom buds of the seedlings of the strawberries are promoted to differentiate by utilizing advantages of the climate in a cold area of a specific region in the north in summer.

The invention discloses a ballast bed and tunnel bottom defect regulating and constructing method as well as an anchoring device. The anchoring device comprises anchor rod and ballast bed slab anchoring ends and ballast bed slab middle anchoring ends, wherein each anchor rod and ballast bed slab anchoring end comprises a combination end, an anchor rod I and deformed steel bars I, the combination end is welded by two pieces of anchor rod clamp-fixing angle steel and a piece of ballast bed slab clamp-fixing angle steel, the two pieces of anchor rod clamp-fixing angle steel are welded on the same surface of the ballast bed slab clamp-fixing angle steel, and an interval allowing the anchor rod I to pass is reserved between the two pieces of angle steel, and the deformed steel bars I are welded on two sides of the combination end respectively; and each ballast bed slab middle anchoring end comprises a bearing plate, an anchor rod II and deformed steel bars II, the bearing plate adopts a crossed steel plate provided with a hole which is formed in the middle and allows the anchor rod II to pass, and the deformed steel bars II are welded on two sides of the bearing plate respectively. According to the ballast bed and tunnel bottom defect regulating and constructing method as well as the anchoring device, the structure is simple, the processing is easy, the problems of baseplate reinforcement and controlling and blocking of opening and closing cracks between the ballast bed slab and the baseplate can be solved effectively, and the purpose of quick, effective and comprehensive regulation of the ballast bed slab and tunnel bottom defects is achieved.

The invention provides bacillus velezensis as well as a microbial inoculum and application thereof, and belongs to the technical field of microorganisms. The biocontrol bacterium Bacillus velezensis GY1 is screened from rhizosphere soil of healthy tobaccos, has a remarkable antagonistic effect on various phytopathogens in the agricultural production, is wide in antibacterial spectrum, and is capable of effectively controlling tobacco mildew and rot and tobacco brown spot expansion in the baking period through testing, and therefore, the tobacco quality is improved, the tobacco use value is improved, so that the bacillus velezensis has wide application prospect and good practical application value in the field of biological prevention and control of plant diseases.

The invention relates to the field of building engineering, in particular to a basement exterior wall construction method and structure. In the method, an underground continuous wall in foundation pitsupporting is used as a part of a basement side wall, so that a basement exterior wall is thinned; besides, by directly using the underground continuous wall as an outer form of a basement floor, a floor slab and the exterior wall, expansion force generated by concrete of the basement floor, the floor slab and the exterior wall in the pouring and setting process is effectively resisted; meanwhile, the concrete of the basement floor, the floor slab and the exterior wall has no exposed part on the outer side, so that the concrete is in a good curing state and not likely to crack; by taking themeasures of arranging a hidden beam in the floor of the basement exterior wall, arranging a flexible coiled material on the basement floor and the like, the generation of cracks in the basement concrete construction process is effectively controlled.

The invention relates to a hydraulic valve assembly having a cartridge insert valve in a bore hole designed in a valve block and connected to the flow channels arranged in the valve block, comprising a valve sleeve inserted in the bore hole and a closing member guided into said sleeve, wherein the valve sleeve forms a valve seat for the closing member in the closing position thereof and the closing member can be moved by means of a connected hydraulic pre-control between the closed position thereof seated on the valve seat and separating the flow channels from one another, and an opened position pushed into the valve sleeve, and the bore hole is sealed tight by the cartridge insert valve inserted therein via a valve cover connected to the valve block. The closing member forms a sleeve-shaped closing element (17) exhibiting a through-hole (18) and thus ring surfaces on both ends thereof, the surfaces having identical area, and a pressure equalization chamber (19) corresponding with thethrough-hole (18) of the closing element (17) is formed in the valve cover (20) such that the closing element (17) is engaged on both sides with the pressure enacting in the adjustment direction of the element, which is seated completely pressure-equalized in the valve sleeve (14), wherein a radially protruding collar (21) having control surfaces (22, 23) opposite one another in the adjustment direction is arranged on the outer circumference of the closing element (17) for adjustment thereof. The control surfaces can be loaded by the control oil conducted via the hydraulic pre-control (25) for moving the closing element (17) in the valve sleeve (14), and the valve sleeve (14) inserted in the bore hole (11) of the valve block is fastened on the valve cover (20), the valve seat (16) formed on the valve sleeve (14) thereby maintaining an unaltered distance from the valve cover (20) during operation of the valve assembly.

The invention relates to the technical field of pesticides, and in particular relates to a medicinal composition containing amisulbrom. The medicinal composition comprises the following active ingredients by weight: 0.5-5 parts of pyraflufen-ethyl, 3-30 parts of the amisulbrom and 40 to 120 parts of a high fat film. In the active ingredients of the medicinal composition, the pyraflufen-ethyl playsa defoliation effect, and after application, the growth environment of cotton bolls in the middle and lower part of a cotton plant can be improved, and an environment which is not conducive to the infection and growth of pathogenic microorganisms can be created; the amisulbrom can effectively prevent the occurrence of cotton boll rot caused by oomycetes; the high fat film can effectively controlthe expansion of infected lesions and reduce the incidence of the cotton bolls infected by other weak pathogenic pathogens. After compounding of the pyraflufen-ethyl, the amisulbrom and the high fat film, by adjustment of the external environment of the cotton bolls and inhibition of the pathogen activity and the infection probability of the cotton boll rot, the development of the cotton boll rotcan be effectively controlled, and the incidence of the cotton bolls infected by other weak pathogenic pathogens can be reduced after the medicinal composition is applied in the initial stage of the cotton boll rot.

The invention relates to the technical field of pesticides, and particularly provides a pharmaceutical composition containing trifloxystrobin. The composition is prepared from, by weight, 0.5-5 partsof pyraflufen-ethyl, 8-30 parts of trifloxystrobin and 90-180 parts of palmityl alcohol-lauryal alcohol. Among effective substances of the pharmaceutical composition, pyraflufen-ethyl has a defoliation function, the growth environment of cotton bolls at the middle lower portions of cotton plants can be improved after application, and an environment which is not conducive to the infection and growth of pathogenic microorganisms is created; trifloxystrobin can effectively prevent and control the occurrence of cotton boll rot caused by oomycetes; palmityl alcohol-lauryal alcohol can effectively control the expansion of infected lesions and reduce the probability of cotton bolls infected by other weak pathogenic pathogens. Through compounding of pyraflufen-ethyl, trifloxystrobin and palmityl alcohol-lauryal alcohol, the external environment of the cotton bolls can be adjusted, and the pathogen activity and infection probability of the cotton boll rot are inhibited; after the composition isapplied at the initial period of the cotton boll rot, the disease condition development can be effectively controlled, and the probability of the cotton bolls infected by other weak pathogenic pathogens can be reduced.

The invention discloses a rare earth permanent magnet material surface corrosion-resistant coating and a preparation method thereof. A rare earth oxide/nitride thin layer is formed on the surface of a rare earth permanent magnet material through magnetron sputtering and in-situ oxidation/nitridation treatment. The preparation method comprises the following steps: (1) depositing a high-abundance light rare earth La/Ce/Y/Nd single-layer film or multi-layer composite film on the surface of the rare earth permanent magnet material by adopting a vacuum magnetron sputtering method; and (2) an atmosphere heat treatment method is adopted, and the surface corrosion-resistant coating is generated through in-situ oxidation/nitridation. According to the method, magnetron sputtering and in-situ oxidation/nitriding treatment are combined, a uniform, compact and stable coating is formed, the corrosion resistance of the rare earth permanent magnet material can be greatly improved, and the service life of the material is prolonged.

The invention discloses a spinning yarn-dyed fabric production doffing tension self-adjusting bobbin hanger improvement device which comprises a hanger rod fixedly installed on a spinning machine, the bottom of the hanger rod enables an upper cover cap to rotate through a rotating assembly, a winding rod is fixedly connected to the bottom of the upper cover cap, and an adjusting mechanism is arranged in the winding rod. The adjusting mechanism comprises a pull rod and a triangular block. The invention relates to the technical field of weaving production. According to the yarn guide tension self-adjusting bobbin hanger improvement device for textile yarn-dyed fabric production, by arranging the adjusting mechanism, a triangular block is driven to move through the weight wound on the surface of a winding rod, so that a moving plate drives a pulling rod to move, an elastic assembly extends, and an extension assembly is driven to unfold; therefore, the range of the yarn guide tension for producing the textile yarn-dyed fabric is expanded, the yarn guide tension can be better wound and unwound, the processing efficiency is improved, and a bobbin hanger can be used more smoothly.

The invention provides an arc-shaped steel fiber which is characterized in that a main body of the arc-shaped steel fiber is an arc, anchoring sections can be arranged at the two ends of the fiber in order to improve anchoring of the fiber in a base body, each anchoring section can be composed of one or more continuously-arranged end hooks, and each end hook is composed of an arc section and a linear section. Aiming at overcoming that a one-dimensional size fiber in a base body has defects in a bridging mechanism and the crack inhibition capability, the arc-shaped steel fiber with the two-dimensional size characteristic is prepared,the arc-shaped steel fibers are paved on the whole mold in advance, through the mutual hooking effect of the arc-shaped steel fibers, the two-time bridging effect of the arc-shaped steel fibers on base body cracks and the advantage effect that two fibers can form a closed space in a base body to restrain crack propagation, the inhibition efficiency of crack propagation is improved, and the basic mechanical property of the seepage pouring fiber concrete is greatly improved.