48results about How to "Reduce mining costs" patented technology

The invention discloses a distributed multi-agent chain transmission control system and method for a scraper conveyor. The transmission control system comprises a machine head intelligent body, a middle intelligent body, a machine tail intelligent body and a coal conveying part. The machine head intelligent body and the machine tail intelligent body only provide driving force of the motor, a chain tensioning system at the machine tail is omitted, and the space of a roadway is saved. The middle intelligent body comprises a motor driving system and a torsion tensioning system, the middle intelligent body can provide motor driving force, a chain tensioning force control system of the middle intelligent body is designed based on torsion and translation movement, and tensioning force control over a single-side chain or a double-end chain of the middle intelligent body can be achieved. The control method provided by the invention is a hierarchical control method based on multi-agent reinforcement learning, motor power balance and tension force control are combined, and stable coal conveying work of the scraper conveyor is ensured.

The invention discloses a cellular coalbed methane exploration and development well pattern deployment method, which comprises the following steps: step 1, carrying out geological exploration and analysis, and determining the distribution, reservoir characteristics and geological conditions of coalbed methane; 2, according to occurrence characteristics and geological conditions of the coal bed gas, a honeycomb type well pattern layout is designed; step 3, accurately arranging a well position: optimizing the well position by utilizing a geographic information system and a computer simulation technology; 4, drilling operation is conducted, specifically, in the drilling process, a directional and horizontal drilling technology is adopted, and it is ensured that drilling is conducted according to the preset track and angle; 5, fracturing operation is conducted, specifically, fracturing fluid is injected into the well through a high-pressure pump, cracks are formed, and the permeability of the coal seam is improved; and step 6, carrying out production testing and monitoring. According to the method, the honeycomb structure is simulated, the mining wells are evenly distributed on the coal seam, the coal seam area can be covered to the maximum degree, comprehensive covering and efficient development of coal seam gas resources can be achieved, and the recovery rate of coal seam gas is increased.

The invention relates to the technical field of plastic modification processing, in particular to high-conductivity composite system coated black talcum powder and a preparation method thereof as well as a modified master batch containing the black talcum powder and a preparation method of the modified master batch. The high-conductivity composite system coated black talcum powder coating material is prepared from the following components in percentage by mass: 65.0 to 76.0 weight percent of high-conductivity composite system coated black talcum powder, 5.0 to 10.0 weight percent of cobalt ferrite nanoparticles, 15.0 to 20.0 weight percent of carrier resin, 2.0 to 3.0 weight percent of dispersing agent and 0.5 to 1.0 weight percent of lubricating agent, according to the technology provided by the invention, the black talcum powder is changed from a common traditional inorganic filler to a high-end functional filler with a conductive functional modification effect, so that the product added value of the black talcum powder is improved, and an important contribution is made to development and application of black talcum powder ore in China.

The invention discloses a method for optimizing key structure parameters of a deep well electric submersible pump based on performance simulation, and relates to the technical field of design optimization of electric submersible pumps, a three-dimensional geometric model of a deep well submersible centrifugal pump is built in advance, the three-dimensional geometric model comprises an impeller, a guide shell, a pump shaft, a pump shell, an upper connector, a lower connector and a full-flow-channel structure, and initial structure parameters are calibrated; and establishing a centrifugal pump simulation model based on a computational fluid dynamics technology, performing fluid domain extraction, grid division and grid independence verification on the three-dimensional geometric model, and setting fluid attributes, boundary conditions and a turbulence model. According to the method, a closed-loop iteration framework for simulation, optimization, evaluation and feedback is constructed by adopting a mode of coupling a computational fluid dynamics simulation technology and a genetic algorithm, the limitation of local parameter optimization in the prior art is broken through, systematic and collaborative optimization of key structure parameters of the submersible centrifugal pump is realized, and the method is suitable for large-scale popularization and application. And the efficiency of the optimization process and the final optimization effect are obviously improved.

The invention relates to the technical field of plastic modification processing, in particular to a high-electric-conductivity and high-heat-conductivity reinforced polyphenylene sulfide compound based on black talcum powder filling. The PPS compound is a PPS composite material filled with black talcum powder coated on the basis of a high-conductivity composite system, and the PPS compound is prepared from the following components in percentage by mass: 75.0 to 86.0 weight percent of PPS resin, 10.0 to 21.0 weight percent of black talcum powder coated by the high-conductivity composite system, 2.0 to 3.0 weight percent of ferric trichloride powder, 0.5 to 1.0 weight percent of dispersing agent, 0.1 to 0.15 weight percent of main antioxidant and 0.1 to 0.15 weight percent of auxiliary antioxidant. The black talcum powder is coated with a high-conductivity composite system, an electronic path is established between an internal graphite layer and an external coating layer, and when the high-conductivity composite system is used for PPS filling modification, not only is the strength, modulus, rigidity, surface hardness and dimensional stability of PPS improved, but also the conductivity and thermal conductivity of PPS can be remarkably enhanced, and therefore the effect of achieving two purposes at a time is achieved.

The invention provides an iron ore deep hole downward fan-shaped hole arrangement mining method which comprises the following steps: step 1, performing stope arrangement, arranging an upper vein-following transportation roadway and a rock drilling chamber at the upper part of a stope for ore transportation and drilling operation, and arranging a lower vein-following transportation roadway, an ore removal gate roadway and an ore loading access road at the lower part of the stope for ore transportation and loading; 2, cutting transverse roadways and cutting wells, correspondingly arranging bottom and top cutting transverse roadways at the center or the end part of the stope to form a blasting free surface, digging the cutting wells in the hanging wall of the ore body, and penetrating through the bottom and top cutting transverse roadways to provide a space for blasting operation; and thirdly, fan-shaped deep holes are arranged, and the downward fan-shaped holes of the deep holes are formed in the chamber to replace original vertical hole arrangement mining, so that the method can better adapt to the geological conditions, the mining efficiency is improved, a larger ore body area can be covered, the ore collection rate is improved, and the mining cost is reduced.

The present application discloses a basalt mining device and a method of using the same, which belongs to the field of basalt mining, and comprises an impact module and a splitting module placed inside a borehole; the impact module comprises an impact piece and an impact power device for driving the impact piece to impact the inner wall of the borehole, and the widening piece applies a splitting force to the rock from inside the borehole to open the cracks in the rock; the impact module and the splitting module are simultaneously arranged in the basalt borehole to crush the rock, and the impact module can cause multiple damages inside the rock by generating stress waves, thereby effectively reducing the overall strength of the basalt, and the splitting device further expands the borehole, and utilizes the characteristic that the tensile strength of the rock is much lower than the compressive strength, so that the high-hardness basalt is easier to be crushed. This combined use method can combine the effects of stress waves and splitting forces, and significantly improve the crushing efficiency of high-hardness basalt.

The invention discloses a photo-initiation self-suspension proppant and a preparation method and application thereof.The method comprises the steps that firstly, acrylamide, ethylene monomers, sulfonic acid monomers, a cross-linking agent and a photoinitiator are added into water and stirred to be dissolved, the pH value of a system is adjusted to be 3-7, and modified liquid is prepared; the modification method provided by the invention is simple and reasonable in design, and the prepared quartz sand proppant has excellent suspension performance, can effectively reduce the oil and gas exploitation cost and improve the oil and gas yield, and meets the requirements of unconventional oil and gas reservoir exploitation.

The present invention discloses a dual-function ceramsite for shale oil and gas fracturing and in-situ hydrogen production and a preparation method thereof, and belongs to the technical field of oil and gas field development. The preparation method comprises the following steps: S1: mixing oil-containing mud, skeleton material, binder, sintering aid, fiber and metal salt to obtain slurry; S2: pouring the slurry into a granulator for granulation to obtain proppant pellet embryos; S3: pore-forming sintering of the proppant pellet embryos to obtain ceramsite proppant; S4: coating the ceramsite proppant with resin to obtain coated proppant, which is the dual-function ceramsite. The present invention focuses on the difficulties in shale oil and gas development and oil-containing mud treatment, prepares ceramsite proppant through resource utilization of oil-containing mud and gives it catalytic ability, combines supercritical CO2 fracturing technology, realizes dual functions of fracturing support and underground in-situ cracking hydrogen production, improves oil recovery rate and gas recovery rate, solves H2S pollution problem, and reduces shale oil and gas production cost.

The present application discloses a simulated wellbore experimental system, which belongs to the technical field of oil and gas production. The simulated wellbore experimental system includes a fixed wellbore and a replaceable experimental pipeline assembly located in the fixed wellbore. The experimental pipeline assembly includes an experimental casing, a simulated production oil pipe, a gas injection oil pipe, a guide shoe and a connector. Among them, the gas injection oil pipe is located outside the experimental casing and is connected to the experimental casing through a connector. The guide shoe has a mixing cavity, and the guide shoe is respectively connected to one end of the experimental casing and one end of the gas injection oil pipe, so that the experimental casing and the gas injection oil pipe are both connected to the mixing cavity. The simulated production oil pipe is located in the experimental casing, and the first end of the simulated production oil pipe is located in the mixing cavity of the guide shoe. The simulated wellbore experimental system provided by the present application can reduce the cost of simulated testing in oil and gas fields. The present application is used for simulation testing in oil and gas fields.

The utility model discloses a reusable underground goaf filling hole casing pipe which comprises a filling hole dug in an upper rock mass of an underground goaf and a casing pipe penetrating through the filling hole, a rubber sleeve is arranged outside the casing pipe, the two ends of the rubber sleeve are fixedly connected with the casing pipe, an air cavity is formed between the rubber sleeve and the casing pipe, and the air cavity is communicated with the filling hole. A ventilation component is arranged on the sleeve or the rubber sleeve in a penetrating mode, one end of the ventilation component is arranged in the air cavity, the other end of the ventilation component is arranged on the contactable outer portion, and the ventilation component is a valve core. The rubber sleeve is arranged outside the filling sleeve, the air cavity with the variable size is formed between the rubber sleeve and the sleeve, expansion and retraction of the rubber sleeve are driven by the air cavity, filling of a gap between the sleeve and a filling hole and rapid recovery of the sleeve are achieved, and the device has the advantages of being simple in structure, high in operation convenience, high in filling efficiency, capable of being repeatedly used, low in cost and the like. And the mining cost can be reduced.

The utility model discloses a kind of ore screening equipment for coal mining, including base, base is the hollow cylinder of opening upwards, the elastic connection of base upper surface has receiving tray, receiving tray is the hollow cylinder of opening upwards, receiving tray side elevation is provided with discharge port one, discharge port one is connected with guide chute, vibration mechanism is arranged in base interior, vibration mechanism is connected with receiving tray, receiving tray upper surface is stacked with several sieve barrels by detachable connection mode, several sieve barrels are detachably connected, sieve barrel is circular tubular, sieve barrel side elevation is provided with discharge port two, discharge port two is connected with guide chute, sieve barrel is connected with screening element, screening element is equipped with sieve hole, the aperture of sieve hole of upper screening element is greater than the aperture of sieve hole of lower screening element. By stacking several sieve barrels, and being equipped with screening element of different sieve hole aperture, so as to realize the purpose that a screening operation can separate multiple particle size grade ores.

The invention belongs to the technical field of biological medicine equipment, and particularly relates to a precipitation and filtration method for bacterial liquid collection, which comprises the following steps: S1, sterilizing and drying a precipitation and filtration device to reduce the influence of infectious microbes on bacterial liquid; s2; adding the bacterial liquid needing to be filtered and precipitated into the settling cylinder, and standing; s3, placing a collecting cup in a placing groove, slowly and upwards pushing an ejector pin, pushing the bacterial liquid after standing to a flow dividing pipe, enabling the bacterial liquid to flow out from the flow dividing pipe, and collecting the bacterial liquid in the collecting cup; and S4, stopping pushing the ejector pin when one third of the bacterial liquid is left, storing the collecting cup, and properly treating the residual bacterial liquid, so as to complete the precipitation and filtration of the bacterial liquid.

The present application relates to the technical field of oilfield reservoir reconstruction, and particularly relates to a coiled tubing mechanical control type double-seal drag fracturing equipment and a fracturing method. The method comprises the following steps: taking a reference layer section as a reference, analyzing temperature changes of each sampling position in a target layer section in a target period to obtain a plurality of temperature difference data, and performing local peak point detection on the temperature difference data to determine a plurality of temperature difference local peak data; then, in the plurality of temperature difference local peak data, analyzing a peak height, a peak width and a fracturing balance time of each temperature difference local peak data to determine a probability that each temperature difference local peak data indicates a main fracture, and then identifying a target sampling position indicating the main fracture according to the probability; finally, determining whether to stop fracturing operation of the target layer section according to temperature changes of a plurality of target sampling positions and a number of the plurality of target sampling positions. The present application can output a fracturing operation detection result with high timeliness, avoid unnecessary consumption of fracturing fluid, and reduce the exploitation cost of low-permeability and tight reservoirs.

The invention provides an excavation method which comprises the following steps: dividing coal rock to be excavated along the height direction so as to divide the coal rock to be excavated into a plurality of excavation layers; each excavation layer in the multiple excavation layers is divided into a backhoe layer and a drag hook layer in the height direction, and the backhoe layer is located above the drag hook layer; the backhoe layer in each excavation layer is firstly subjected to backhoe operation, then the drag hook layer in each excavation layer is subjected to drag hook operation, and finally, each excavation layer is subjected to coal excavation. By means of the technical scheme, the technical problem that in the prior art, the mining working efficiency of a mining method is low can be solved.

The invention discloses a winding drum with a built-in motor and an external small-tooth-difference speed reducer. The winding drum comprises the motor, a motor connecting frame, a left supporting seat, a right supporting seat, a winding drum shell and the small-tooth-difference speed reducer. Wherein the motor connecting frame, the motor, the connecting flange and the planet carrier form a penetrating type main shaft which is arranged in the winding drum shell and supported between the left supporting seat and the right supporting seat; the small-tooth-difference speed reducer comprises a center shaft, an eccentric sleeve, a planet wheel, an inner gear ring, a planet carrier, a plurality of bearings and a plurality of sealing pieces. Left and right supporting discs are arranged at the two ends of the winding drum shell and installed on the penetrating type main shaft. The motor is internally arranged, the axial size of the winding drum is shortened, and the roadway and chamber excavation cost is reduced; the small-tooth-difference speed reducer reduces the size of the motor and increases the gap between the motor and the winding drum shell, so that heat dissipation is facilitated; and the speed reducer is externally arranged and is designed in a detachable manner, so that the small-tooth-difference speed reducer can be quickly detached and is convenient to maintain. The winding drum with the built-in motor and the external small-tooth-difference speed reducer has the advantages of being good in heat dissipation performance, large in reduction ratio, simple in structure, short in axial distance, convenient to install, large in reduction ratio and the like.

The invention relates to a fracturing temporary plugging tool, in particular to a soluble arrow cluster tool which solves the problem that an existing fracturing temporary plugging tool is poor in temporary plugging effect, the soluble arrow cluster tool comprises an arrow cluster body and an empennage, the arrow cluster body is made of a metal material soluble in the presence of chloride ions, and the empennage is made of a rubber material soluble in the presence of chloride ions. The front section of the arrow cluster body is of a conical body structure; the sleeving part of the tail wing sleeves the mounting part of the tail section, and the top shape of the sleeving part is matched with the bottom shape of the front section; a limiting part is arranged at the large end of the mounting part and comprises two symmetrically-arranged tail bases, the bottom of the sleeving part abuts against the tops of the two tail bases, the limiting part is arranged at the bottom of the sleeving part, the limiting part is clamped in a clamping groove between the two tail bases, the sleeving part comprises four side walls, and the four side walls correspond to the four side walls of the front section respectively. The shape of each side wall of the sleeving part is matched with the shape of each of the four side walls of the front section, and a cone structure extending downwards is formed.

The utility model provides a kind of broken material collecting device and mining machine, the bottom of hopper is provided with discharge port, power mechanism is set to the end of hopper, rotating shaft is rotatably set in hopper, and transmission connection with power mechanism, the outer surface of rotating shaft is equipped with the spiral structure for conveying material to discharge port, crushing assembly is set to the surface of rotating shaft. Through the above-mentioned broken material collecting device disclosed, rotating shaft is rotated by power mechanism, so that crushing assembly arranged on rotating shaft crushes material, and material is conveyed by the spiral structure of rotating shaft, so that crushed material is timely discharged through discharge port to realize continuous mining of material, compared with the existing mining equipment, the crushing system and material collecting device integrated design can not only reduce mining process, but also simplify the operation complexity and management difficulty of mining equipment, ensure the lump coal rate of coal, reduce mining cost, improve mining efficiency.

The application discloses a gradation material mining optimization method and device based on boundary conditions, equipment and medium. The method comprises the following steps: obtaining the relationship curve between the minimum resistance line and the gradation good rate, and determining the boundary condition of the minimum resistance line; obtaining the gradation design envelope curve, and determining the best gradation distribution index based on the gradation design envelope curve; after obtaining the condition parameters of the target gradation material mining blasting design, traversing the boundary condition, combining the condition parameters and the best gradation distribution index to solve the hole spacing coefficient corresponding to each minimum resistance line in the minimum resistance line; selecting all effective hole spacing coefficients from the hole spacing coefficients, calculating the blasting parameters corresponding to each effective hole spacing coefficient based on the effective hole spacing coefficients, and solving the explosive unit consumption according to the blasting parameters; determining the minimum explosive unit consumption from the explosive unit consumptions, and determining a group of blasting parameters corresponding to the minimum explosive unit consumption as the best blasting parameters. The technical scheme of the application improves the gradation good rate.

The invention belongs to the technical field of oil exploitation equipment, and particularly relates to an underground microbubble generator. The underground microbubble generator comprises an outer cylinder, an inner cylinder and a functional part. A micro-bubble generating part capable of converting gas into micro-bubbles is mounted on the side wall of the inner cylinder. The underground microbubble generator can adapt to the underground working environment, and a large number of microbubbles can be generated only through a physical method and used for plugging and oil displacement operation. The oil field recovery efficiency is effectively improved, meanwhile, the use of chemical reagents such as foaming agents is avoided, and the method has better economical efficiency and has good application prospects in the technical field.

The application discloses a kind of parallel thin vein mechanized mining method, by using the way of half intra-vein in parallel vein interval to construct slope, it is back to construction in vein interval, simultaneously, using the mining layering in vein as intra-vein walking passage, using double layering synchronous stoping mode in vein, can effectively reduce the engineering quantity of slope, simplify mining preparation engineering, realize low mining cutting ratio, small engineering quantity mining preparation.Meanwhile, by constructing ore chute in vein interval, using rock drilling jumbo to drill rock for layering stoping, using shovel-truck to mine, can improve the degree of mechanization, reduce overall engineering quantity, reduce mining cutting ratio, and further reduce overall mining cost, achieve the purpose of parallel thin vein mechanized mining.This parallel thin vein mechanized mining method can realize the angle adjustment of vein interval slope, and is suitable for the mechanized efficient mining of thin vein with a vein inclination of more than 30°.

The invention discloses a trona exploitation method and a trona exploitation well, and relates to the technical field of trona exploitation, the trona exploitation method comprises the following steps: drilling to form an exploitation well: vertically drilling from a first position of the earth surface to the underground to form the exploitation well; drilling to form an injection well: vertically drilling from a second position of the earth surface to the underground to form a straight well section; a directional drilling tool formed by combining a coiled tubing, well bottom power and a measurement-while-drilling system is adopted, the bottom of the vertical well section serves as a starting point, multiple times of turning is conducted to the horizontal direction, drilling is conducted to form a plurality of horizontal sections which are sequentially communicated end to end, and one end of the horizontal section formed by last-time horizontal drilling is communicated with the mining well; the straight well section and the horizontal sections form an injection well; and mining trona: injecting water into the injection well, and extracting brine from the mining well. According to the trona mining method and the trona mining well, the mining area can be increased, the mining efficiency can be improved, and the cost is lower.

A composite double well fire flooding method for low permeability difference oil layer belongs to the technical field of artificial auxiliary viscosity reduction technology in tertiary oil recovery process. The composite double well low permeability reservoir development process is as follows: two wells are drilled at all well sites in the oil production core area, one is a composite oil production well, and the other is a fire flooding air injection well. All the drilled wells at the outer edge of the reservoir are single oil production wells. The fire flooding air injection well in the well pattern supplements the high production layer and is ignited by physical and chemical methods. Any oil production well in the well pattern cannot supplement the fire flooding layer. The present application has the following characteristics: the composite double well fire flooding technology absorbs the advantages of steam huff and puff development, steam flooding, fire flooding and other development methods, has low cost, good effect, reduces labor intensity and saves human resources.

The invention discloses a mechanical wall cutting and filling mining method for a steeply inclined thin vein, which comprises the following steps of: S1, dividing the steeply inclined thin vein into middle sections and ore blocks, and tunneling pedestrian material courtyards in columns among the ore blocks; s2, an in-vein haulage roadway is tunneled, then a pedestrian material courtyard is tunneled upwards through the in-vein haulage roadway, and a stope connection way is constructed; s3, a milling excavator is adopted for mining from one side to the other side, wall cutting is not needed after the first layer is stoped, wall cutting is conducted on the surrounding rock after the second layer is stoped, a false bottom is laid on the first layer, and a pass shaft is reserved; after the third layer is mined, the carry-scraper enters a stope to transport ore to a drop shaft on the way for ore removal, wall cutting is carried out on surrounding rock after stoping is completed, then filling is carried out, and a space is reserved for operation of the stoping carry-scraper of the next layer; and S4, the stoping operation of each layer is continuously and upwards carried out, and the stoping of each subsection ore body is completed. The filling mining method solves the technical problems that in the prior art, the mining production cost is high, and the operation safety cannot be guaranteed.

This utility model discloses an integrated dust control device for ore unloading openings in roadways, including a top baffle. The top baffle has a semi-circular structure and is vertically installed at the top of the connecting roadway of the ore pass. A strip-shaped rubber dust curtain is suspended below the top baffle. A connecting opening for installing a side suction hood is provided on the lower side of the top baffle. One end of the dust removal duct is connected to the side suction hood, and the other end is connected to a wet vibrating grid dust collector. The spray dust suppression device includes a horizontal support plate and atomizing nozzles. The horizontal support plate is located above the connecting roadway of the ore pass, and atomizing nozzles are installed at intervals at the bottom of the horizontal support plate. This utility model uses the top baffle to block the airflow of dust from spreading to the main roadway. The strip-shaped rubber dust curtain and flexible sealant further seal the dust escape path. The dust is transported to the wet vibrating grid dust collector for purification through the inclined dust removal duct. Fine dust that is not captured enters the second line of defense. The atomizing nozzles spray high-pressure water mist to envelop the dust, causing it to agglomerate and settle.

The invention provides an in-vein S-shaped ramp open-stoping subsequent filling mining method for a gently inclined thick and large ore body, which comprises the following steps of: establishing an ore body three-dimensional model, and decomposing an ore body bottom plate contour line; constructing a middle-section haulage roadway; an in-vein S-shaped slope ramp is tunneled, and the S-shaped slope ramp is communicated with the middle section haulage roadway; two steps of stopes are divided on the left side and the right side of the S-shaped slope ramp, a connection roadway is tunneled from the S-shaped slope ramp and is communicated with the rock drilling roadway, and a cutting transverse roadway is constructed from the rock drilling roadway of the stope stoping boundary in the width direction of the stope; a linear slope ramp is constructed from the highest position of the S-shaped slope ramp, and a filling return air connection road is tunneled; the cutting courtyard is constructed, upward parallel blast holes are constructed in the cutting transverse roadway, and cutting grooves are formed through blasting; an upward fan-shaped medium-length hole is constructed in the rock drilling roadway, a flat bottom structure is formed through blasting, ore is transported out of the S-shaped slope ramp, and roof contact is filled after stoping is completed; and the comprehensive economic benefit of mining is comprehensively improved.

The invention provides an underground coal mine hydrogen sulfide prevention and dust fall integrated device which comprises a device driving mechanism, a detection opening assembly, a hydrogen sulfide prevention and dust fall assembly and a ventilation system. Wherein the two detection opening assemblies are symmetrically arranged and are fixedly assembled on the upper surface of the drill bit mechanism; one side of the hydrogen sulfide prevention and dust fall assembly is fixedly assembled on the upper surface of the device driving mechanism, and the other side of the hydrogen sulfide prevention and dust fall assembly is fixedly assembled on the upper surface of the drill bit mechanism; the ventilation systems are arranged on the front side and the rear side of the device driving mechanism and fixedly assembled on the side wall of the mining mine. Hydrogen sulfide gas is regularly monitored through the detection open assembly, the underground hydrogen sulfide gas concentration is dynamically monitored and managed, and therefore the mining efficiency, the strength of a ventilation system and the water spraying strength of the hydrogen sulfide prevention and dust falling assembly are adjusted according to the real-time concentration of hydrogen sulfide, potential safety hazards are found and treated in time, and the mining efficiency is improved. And meanwhile, a coal wall to be mined can be detected.

The invention particularly relates to an excavating device for mining and a construction method thereof.The excavating device comprises an excavator frame, a machine arm and a first hydraulic telescopic rod, the machine arm and the first hydraulic telescopic rod are hinged to the front side of the excavator frame, the middle of the machine arm is connected through the telescopic end of the first hydraulic telescopic rod, and the front end of the machine arm is rotationally connected with a movable support; an excavating assembly is movably connected to the front end of the movable support, and an upper arc-shaped cover and a lower arc-shaped cover are installed on the upper side and the lower side of the movable support on the rear side of the excavating assembly respectively and used for blocking dispersion of mineral aggregate when the excavating assembly excavates the mine. In other words, when the two side digging rollers rotate anticlockwise and upwards to dig the mineral aggregate, the reverse transmission mechanism drives the breaking roller in the middle to rotate clockwise and downwards synchronously to crush and dig the mineral aggregate, so that different knob digging forces and digging directions are generated, the mineral aggregate is more effectively excavated, the structure of the mineral aggregate is efficiently damaged, and the working efficiency is improved. Therefore, the mineral aggregate is more easily excavated, and the excavation speed is increased.

The utility model provides a power self-control medium-frequency electric heating oil extraction device, which relates to the technical field of oil extraction devices and comprises a power self-control medium-frequency power supply, a live wire, a null line, a hollow rod wellhead sealer and a shielding signal line, and the output end of the power self-control medium-frequency power supply is connected with an armored electric heater through the live wire and the null line. The armored electric heater is installed inside the hollow sucker rod, a hollow sucker rod screwed plug is arranged at the tail end of the hollow sucker rod, and the hollow sucker rod is connected to a piston of the oil well pump. By arranging a power self-control medium-frequency power supply, an armored electric heater, a temperature transmitter, a frequency conversion circuit, a medium-frequency transformer, a temperature control instrument and a PLC touch screen control system, the oil outlet temperature of a wellhead is sensed, a heating device is automatically controlled to work according to the oil outlet temperature and a numerical value set by a user, the use of electric energy is reduced to the maximum extent, and the service life of the heating device is prolonged. The oil extraction production is safe, efficient and intelligent, so that the crude oil extraction cost is reduced.

This invention relates to a dynamic optimization decision-making model for the mining sequence of polymetallic symbiotic ore bodies, comprising an edge layer, a cloud platform, and a control terminal. The edge layer, cloud platform, and control terminal interact through dedicated interfaces, achieving a closed-loop process from data acquisition, processing, decision-making, to execution. The edge layer acquires ore body data in real time via a multi-source sensor network, preprocesses it through an edge computing terminal, and then uploads it to the cloud platform. The cloud platform uses a dynamic geological model engine to construct a real-time 3D ore body model and generates a Pareto optimal mining scheme that comprehensively considers economic, environmental, and safety factors through a multi-objective optimization engine. The control terminal uses a digital twin console to visualize the scheme and allow for manual intervention, while the equipment control system automatically executes mining commands. The model supports hourly dynamic updates, significantly improving resource recovery rate and decision-making efficiency, reducing environmental costs and mining risks, and achieving efficient, intelligent, and green mining of polymetallic symbiotic ore bodies.