Deep-concave strip mine production model system

The invention relates to a deep-concave strip mine production model system which comprises a deep-concave excavating plant, a refuse dump, ground transportation roads and a raw coal washing field. The deep-concave excavating plant is a coal excavating plant arranged on a coal seam in a simulating mode; as simulation, multiple bucket wheel excavators conduct continuous stripping work on the north working pit edge and conduct coal production work in a deep place, stripped objects in the excavating plant are conveyed to the refuse dump on the south part of the ground through a belt conveyor arranged on the east end pit edge to be discharged through a dumping plough, and run-of-mine coal in the excavating plant is conveyed to the raw coal washing field on the west side of the ground surface boundary through a belt conveyor arranged on the west end pit edge to be processed. By means of the deep-concave strip mine production model system, tests under various construction process conditions can ...

City tunnel shaft type natural ventilation and smoke-discharging proof method

The invention discloses a city tunnel structure system, a city tunnel is equipped with a plurality of naturally ventilating vertical wells, the top end of the vertical well is communicated with the ground, the lower end of the vertical well is communicated with the inside of the tunnel. The vertical well is arranged on the top or side upper part of the tunnel along the length direction. The naturally ventilating vertical wells can be arranged continuously along the whole length of the tunnel, or discontinuously along the whole length of the tunnel, the largest distance between the vertical wells is preferably larger than 240 meters. The top end of the vertical well can be added with a wind cap, and an auxiliary ventilator is added when natural ventilation amount is adequate. The invention also discloses a city tunnel vertical well type natural ventilation and smoke control technology using the structure system, which is suitable for single cavity two-direction traffic tunnels, as well as ...

Recovery method of metalized ceramic wastes

The invention discloses a recovery method of metalized ceramic wastes, which comprises the following process steps of: industrial alcohol soaking, clear water soaking, ultrasonic cleaning, soda boiling, hydrochloric acid soaking, drying, and two-times sintering. Through the above process, metalized layers of surface layers of ceramic wastes can be removed; the recovery process is simple and practical, low in cost, high in recovery rate, and suitable for industrialization development of metalized ceramic waste recovery; the recovered ceramics are examined to be good in quality, and suitable for secondary utilization.

Big inclination colliery lane entire supporting device

The utility model discloses a big inclination colliery lane entire supporting device, including loop bar, layer board, pole setting, inclination branch, angle scale, bottom plate, the loop bar top with weld mutually at layer board bottom surface center, loop bar bottom cover is in the pole setting top outside, the pole setting bottom with the bottom plate top surface is articulated mutually, the angle scale is half circular and establishes on the bottom plate top surface of pole setting front side, the angle hole that has the circular arc to distribute is openly opened in outside edge to the angle scale, the pole setting downside openly open have with the corresponding screw hole in angle hole, hinge an is installed to the intermediate position of pole setting one side, hinge an is connected with the one end of inclination branch, the other end of inclination branch is nib form tip, and the position that is close to the pole setting to the side of it articulates there is auxiliary connecting ...

Rock step wedge body landslide monitoring model

The utility model discloses a rock step wedge body landslide monitoring model, including base, casing, slip mass, actuating system, the casing set up in on the base, the casing is put on the shelf andis equipped with an arc concave body, arc concave body is reduced gradually or is increased gradually by one end to the other end, the slip mass slides and sets up on the arc concave body, the actuating system can drive the slip mass is followed arc concave body slides. The utility model discloses rock step wedge body landslide monitoring model can simulated rock step wedge body the process on landslide, be applicable to scenes such as teaching demonstration, can also reset convenient to use through the drive arrangement drive after the slip mass landing.

Inorganic hydrated salt expanded graphite composite phase-changing heat storage material and preparation method thereof

The invention relates to an inorganic hydrated salt expanded graphite composite phase-changing heat storage material. In the preparation method thereof, 85-89 mass parts of inorganic hydrated salt sodium acetate trihydrate as a heat storage matrix, 5.5-6.5 mass parts of disodium hydrogenphosphate as a nucleating agent, 2.5-3.5 mass parts of carboxymethyl cellulose as a thickening agent, and 3-4.5 mass parts of expanded graphite is blended in an inorganic hydrated salt mixture as a material with a high thermal conductivity. Due to the use of the expanded graphite, the material not only maintains excellent properties of natural flake graphite such as good thermal conductivity, no toxicity and the like, but also has adsorbability which the natural flake graphite does not have. The invention solves the problems of sub-cooling degree, phase stratification and low thermal conductivity during the heat storage process. The composite phase-changing material has a low sub-cooling degree after the ...

Strip mine rock step bedded slope landslide monitoring model

The invention discloses a strip mine rock step bedded slope landslide monitoring model which comprises a template, rock layers, a controller, a motor, a seat frame, a bed and a wire drawing sensor. The seat frame is arranged on the bed; the template is arranged above the seat frame; three rock layers are placed on the template; the motor is arranged inside the rock layers; the controller and the wire drawing sensor are arranged on the template; a chain is mounted at the bottom of the rock layer; the motor is connected with a gear by the chain; the motor drives the gear; the gear drives the chain to move; each rock layer is independently connected with a displacement sensor, so that the displacement can be accurately known and accurate control on the displacement is implemented; the displacement sensors are connected with the controller. The strip mine rock step bedded slope landslide monitoring model is specially manufactured according to a great quantity of landslide accidents generated ...

Plant protective structure of soil slope protection and slope rain water evacuation

The utility model discloses a plant protective structure of soil slope protection and slope rain water evacuation, including the slope body, dead lever, through dead lever bolted connection between the slope body and the slope body, personally experience sth. Part of the body by sloping limit in the slope, the base of slope, and sloping border is constituteed, the base of slope shape is the arc, the base of slope bottom is provided with grabs the ground pole, slope limit shape is the plane, base of slope and sloping limit fixed connection, slope limit and sloping border fixed connection. The utility model discloses can effectual discharge ponding when soil slope protects, effectual fixing on soil slope, the live time is long pollution -free simultaneously, and it is effectual to cross water, the easy growth, ecological lattice is few to the plant restriction, and plant growing trend is better, is fit for the large tracts of land and popularizes and applies the ecological lattice in thesoil ...

Use ecological lattice in soil slope protection

The utility model discloses an use ecological lattice in soil slope protection, including an use ecological lattice in soil slope protection the frame, the intranet, the intranet is fixed inside the frame, the frame shape can be for the square, be provided with the frame drip molding in the middle of the frame, the angular position that the diagonal of frame was located is provided with the diagonal drip molding, diagonal drip molding and frame drip molding intercommunication, the frame bottom is provided with the reinforcement stand. The utility model discloses can effectual discharge pondingwhen soil slope protects, effectual fixing on soil slope, the live time is long pollution -free simultaneously, and it is effectual to cross water, the easy growth, ecological lattice is few to the plant restriction, and plant growing trend is better, and use ecological lattice in soil slope protection is promoted to suitable large tracts of land, and it is simple to have an installation, and thevegetation ...

Integrated grouting device and method for weak cementation roadway surrounding rock drilling and grouting reinforcement

The invention discloses an integrated grouting device and method for weak cementation roadway surrounding rock drilling grouting reinforcement, and relates to the technical field of roadway surrounding rock reinforcement. The integrated grouting device comprises a machine body, a supporting plate is rotationally installed on the side face of the machine body, a movable frame is slidably installed on the side face, away from the machine body, of the supporting plate, and a connecting rod is rotationally installed in a bottom plate of the movable frame; a rotating disc is rotatably mounted on the outer surface of the connecting rod, a limiting block is fixedly mounted on the lower surface of the rotating disc, and a drill rod is detachably mounted in the limiting block. The screw rod drives the moving rod to move front and back to enable the connecting rod to deflect, so that the angle of the drill rod is adjusted, and the rotating machine drives the connecting rod to rotate, so that the ...

X-Ku wave band ultra wide band tight coupling array antenna

The invention discloses an X-Ku wave band ultra wide band tight coupling array antenna, which comprises a plurality of array units arranged periodically, and is characterized in that each array unit comprises a dipole antenna, a first dielectric plate, a second dielectric plate, a covering layer dielectric plate, a frequency selection surface, a metal patch of an equivalent plate capacitor and a floor; each dipole antenna comprises two dipole arms which are connected to the ground through short circuit holes; a dielectric plate covering layer is arranged above the dipole antenna; a layer of double-sided printed frequency selective surface is arranged above the dielectric plate covering layer; the first dielectric plate is arranged below the dipole antenna, the metal patch of the equivalent plate capacitor is located between the first dielectric plate and the second dielectric plate, the SMA connector is used for unbalanced feed, dipole arms are asymmetric, and two groups of asymmetric short ...

Preparation process of absorber with low voltage standing-wave ratio

The invention discloses a preparation process of an absorber with a low voltage standing-wave ratio. The preparation process comprises the following steps: A, preparing powder material, namely, weighing materials such as A-75 aluminum oxide powder and graphite in a proportion of 25:1, adding a certain proportion of adhesive and water, uniformly mixing, pelletizing, and sieving by using a 20-mesh screen, and souring for 72 hours; B, according to appearance requirements of different absorbers, selecting different moulds, adding an appropriate amount of powder material, applying proper pressure, keeping the pressure for 1 seconds-3 seconds, de-molding, and taking out formed absorber blank; C, sintering, namely, sintering at reduced atmosphere, extincting, and then taking out an absorber semi-finished product when temperature in a kiln is naturally reduced to 40 DEG C-60 DEG C; D, grinding, namely, carrying out the grinding on the absorber semi-finished product according to a drawing; and E ...

Mining excavator

The utility model discloses a mining excavator, it contains the excavator body, and a locating plate is outwards extended to the box of this excavator body and the bottom of driver's cabin relative one side, the locating plate one end relative with hopper symmetry fixed mounting has a first telescoping cylinder, and its other end symmetry is fixed with the jar seat, and the piston axle head of two the first telescoping cylinders curb plate through first fixing base and belt conveyor respectively rotates and is connected cooperation, installs respectively on two jar seats rather than rotating connection complex second telescoping cylinder, and the cooperation is connected in curb plate rotation that the piston axle head of this second telescoping cylinder passes through second fixing base and belt conveyor respectively, belt conveyor sets up directly over the locating plate, near one of which end position in the place ahead of track, and its other end extends to the rear of box. The utility ...

Underground cooling device

Inorganic hydrated salt expanded graphite composite phase-changing heat storage material and preparation method thereof

The invention relates to an inorganic hydrated salt expanded graphite composite phase-changing heat storage material. In the preparation method thereof, 85-89 mass parts of inorganic hydrated salt sodium acetate trihydrate as a heat storage matrix, 5.5-6.5 mass parts of disodium hydrogenphosphate as a nucleating agent, 2.5-3.5 mass parts of carboxymethyl cellulose as a thickening agent, and 3-4.5mass parts of expanded graphite is blended in an inorganic hydrated salt mixture as a material with a high thermal conductivity. Due to the use of the expanded graphite, the material not only maintains excellent properties of natural flake graphite such as good thermal conductivity, no toxicity and the like, but also has adsorbability which the natural flake graphite does not have. The invention solves the problems of sub-cooling degree, phase stratification and low thermal conductivity during the heat storage process. The composite phase-changing material has a low sub-cooling degree after the ...

Coal mining is with preventing support that collapses

The utility model discloses a coal mining is with preventing support that collapses, including empty spring main part, stand a, stand b, main bottom plate, travel switch, the top surface of empty spring main part is connected there is free spring roof, the bottom surface of empty spring main part be connected with with the same empty spring bottom plate of empty spring roof size, empty spring bottom plate bottom surface center with stand a's top is connected, stand a bottom cover is in stand b top and with stand b pushes up end screw thread connection, empty spring bottom plate downside is equipped with the connecting plate of cover in the stand an outside, stand b's bottom with main bottom plate top surface central point puts and is connected, main bottom plate top surface is in stand a'sthe outside evenly becomes the circumference and is equipped with a plurality of nail holes, stand b outside cambered surface downside skin weld has a plurality of landing legs of stabilizing, travelswitch's ...

Auto -excitation type smoke prevention and dust control device based on wen's effect

The utility model discloses an auto -excitation type smoke prevention and dust control device based on wen's effect, including basin (1), basin (1) upper portion left side is equipped with air inlet housing (31), and basin (1) upper portion opposite side is equipped with water separation chamber (5), water separation chamber (5) upper portion is equipped with fan (7), fan (7) communicate with eachother with the external world through gas vent (8), air inlet housing (31) one end is passed through air inlet (2) and is communicated with each other with the external world, and the other end communicates with each other with scrollwork room (32) of basin (1) and water separation chamber (5) lower part, still including wet return (4) that are arranged in basin (1) the opposite side relative with scrollwork room (32) be equipped with auto -excitation type passageway (3) based on wen's effect in air inlet housing (31), auto -excitation type passageway (3) one end communicates with each otherwith ...