340results about How to "Realize safe production" patented technology

The invention discloses a method for second mining a mining-stopping line coal column in a super thick coal layer. The method comprises the following steps that (1), positions of a coal column second mining working surface transporting gate trough and a rail gate trough are stimulated; (2) comprehensive probing is conducted on an original working surface goaf area where the super thick coal layer mining-stopping line coal column is located, and potential safety hazard is removed; (3) a roadway in the propelling direction of the coal column second mining working surface is dug at the upper part of the super thick coal layer, and the roadway is filled; (4) a coal column second mining working surface mining returning roadway and a affiliated oblique roadway are dug, so that the coal column second mining working surface mining returning roadway and the affiliated oblique roadway form a completed producing system, and the coal column second mining working surface is arranged; (5) a bottom plate of the roadway is drilled from top to bottom for using as a filled pipeline; (6) filling paste is prepared, the filling paste is evenly injected into one side, close to the original working surface goaf area, of the transporting gate trough along the filled pipeline; and (7) comprehensive mining is conducted on the coal column second mining working surface. According to the method for second mining the mining-stopping line coal column in the super thick coal layer, the compressed coal amount is reduced, waste of coal resources is avoided, the economic benefits of enterprises are improved, and the service life of mines and mining areas is prolonged.

The invention discloses a fan frequency conversion control system and method for air pressure dynamic balance of a mine stope. The fan frequency conversion control system comprises an alternating-current frequency converter console, a counter rotating axial flow fan, carbon monoxide sensors, air speed sensors, a differential pressure sensor, an intrinsically safe power supply, and an intrinsically safe junction box, wherein the alternating-current frequency converter console has two sets of alternating-current frequency converters; the frequency converters, the counter rotating axial flow fanand the intrinsically safe power supply are arranged in an inlet alley; the air speed sensor 1 is arranged in the air inlet alley; the differential pressure sensor and the air speed sensor 2 are arranged in an air return alley; and the two carbon monoxide sensors are arranged in an air return corner region. Data such as carbon monoxide content, air quantity, air pressure and the like is real-timemonitored, ventilation quantity of a mining working surface is automatically controlled, so that the mining working surface and the environment air pressure automatically achieve dynamic balance, thus the safety production of the mining working surface is achieved when a plurality layers of mine goafs are communicated with each other, the working efficiency, the precision degree and the safety degree are improved; the fan is driven by frequency conversion, so that the fan has energy-saving effect, broad adaptability, social benefits and economic benefits.

The invention discloses a method for mechanically mining coal by using a steep seam pseudo inclination bracing type retractable flexible shield support. By the method, a steep seam coal mining machine and a bracing type retractable flexible shield support are provided. The method comprises the following steps of: 1, mining, namely mining by arranging the coal mining machine on a pseudo inclination working surface; 2, loading and transporting the coal, namely raking a falling coal body to a conveying mechanism and conveying the falling coal body to the rear part of the coal mining machine by using left and right gathering arms of the coal mining machine, sliding the falling coal body to a coal sliding hole truck loading point through a sliding chute, loading and transporting; 3, supporting an operating area, namely arranging the bracing type retractable flexible shield support in the operating area; 4, ventilating the working surface; 5, atomizing for dust removal; 6, exploiting upper triangle coal; and 7, recycling lower triangle coal, namely dredging a finishing cut, lowering the shield support to a horizontal position gradually, disassembling and decomposing the coal mining machine, transporting to the next stoping working surface and completely recycling the shield support when the working surface is propelled to a place neara district rise hole. By the method, the problems of low recovery ratio, low mechanization degree, low single yield of the working surface, severe working environment, high probability of malignant accidents and the like in domestic and oversea steep seams can be radically solved.

The invention relates to an intelligent robot capable of high-speed feeding and discharging. An existing feeding and discharging device is complicated to operate. Accordingly, the intelligent robot capable of high-speed feeding and discharging comprises a stand column and a cross arm, wherein the stand column s provided with a vertical linear guide rail, a lifting block is arranged on the vertical linear guide rail, the cross arm is fixed to the lifting block, the lifting block is driven by a ball screw pair, lead screws of the ball screw pair are driven by a lifting servo motor and sleeved with nuts of the ball screw pair, and the nuts and the lifting block are fixed together. The cross arm is provided with a horizontal linear guide rail provided with a slide block, a telescopic arm is fixed to the slide block, a sucker rack or a manipulator grabbing device is fixed to the front end of the telescopic arm, the slide block is driven by a ball screw pair, lead screws of the ball screw pair are driven by a telescopic serve motor and sleeved with nuts of the ball screw pair, and the nuts and the slide block are fixed together. The intelligent robot has the advantages of being convenient to use, safe and efficient, thereby being suitable for various production enterprises needing workpiece carrying.

The invention discloses a goaf waste rock filling coal mining method of a flexible shield support in a half-edge coal seam, comprising the following steps: firstly arranging an alley way before coal mining, wherein the inclined alley way is arranged along a pitching surface according to an angle of 23-25 degrees, mining along the inclined direction from top to bottom and along the trending from east to west; secondly using a flexible shield support for coal mining with coal mining method, using the flexible shield support on a mining surface, tightening among the flexible shield supports by using back boards, using a steel rope to connect into an integral flexible shield support, and separating the goaf waste rock and coal mining space; and finally carrying out goaf waste rock filling. Through the method, safe production of half-edge coal seam can be realized, and simultaneously the handling problem of waste rock produced in underground coal mine can be solved.

The invention discloses a stratified blasting method for a coal mine hard roof, and solves the problem that the conventional hard roof blasting technology is imperfect. The stratified blasting method for the coal mine hard roof comprises the following steps of: drilling a plurality of uniformly distributed drilling holes on the roof on a stope face by utilizing a hydraulic or pneumatic percussion drill, and drilling wedge-shaped pre-cracks along the drilling holes; feeding primary explosive, gun soil and a wood wedge into each drilling hole in sequence by utilizing a wooden stick; striking the outer end of the wooden stick by using a hammer, so that the wooden wedge is tightly clamped in each drilling hole; filling the gun soil to seal each hole; connecting a detonator to a detonating cord; and luting and connecting to a blasting network to implement detonation. By the method, the stratified blasting of a hard roof is realized by filling explosives in a stratified way and forming the wedge-shaped pre-cracks in the vertical direction; the process is simple, operable, low in cost and high in benefit; potential hazards of the roof can be eliminated; and therefore, coal mine production safety is realized.

The invention relates to a data-based urban sewage pumping station system modeling method. The conventional modeling for a drainage pipeline network pumping station model has high complexity. The method comprises the following steps: firstly, establishing a predicting model for a drainage pipeline network pumping station; secondly, preprocessing original data acquired by an SCADA system; thirdly, determining a model set type and identifying a model structure and a model parameter; and finally, performing online dynamic modification on the model parameter. The method of the invention breaks through a constraint that mechanism characteristics are required to be understood completely in the conventional modeling, the modeling time is relatively short and the obtained model structure is relatively simple.

The invention provides an organic tomato health cultivating method which is the health growing cultivating technology combining a biological organic fertilizer system, an endogenous hormone control system and a pest control and prevention system. The method systematically solves the four problems of how to prevent nitrite accumulation and pesticide environmental pollution and poor nutritional quality and flavor quality perplexing organic plantation for a long time. Low-cost production of organic tomato growth cultivation is achieved, chemical fertilizer and chemical pesticide pollution is eliminated for planted tomato products, the soil environment is improved, and the requirements for health, high yield and high efficiency are met.

The present invention provides a kind of method and equipment for preparing graphene oxide, and described equipment comprises premixer, microchannel reactor, collecting tank and cross-flow filtration device, and described premixer, microchannel reactor, collecting tank and The cross-flow filter units are connected sequentially. The production equipment provided by the invention adopts a microchannel reactor as a reaction device, and is designed according to the characteristics of reactants and reaction process, and premixer, metering pump, cross-flow reaction device and collection tank are organically assembled to improve the Reaction efficiency and production safety. The production equipment provided by the invention is more suitable for large-scale production of graphene oxide.

The invention discloses a method for utilizing a hydraulic support to improve a bauxite recovery rate and belongs to a nonferrous metal mining technology. The method comprises the steps of carrying out analysis treatment on monitoring data and carrying out rock mechanical test; determining a mine pressure monitoring measuring point net of a test mining field and parameters of a mining scheme to complete recovery of the test mining field and a mine pressure observation test; determining distribution parameters and a support manner of the hydraulic support; carrying out mine pressure observation and data treatment on a working surface; carrying out maximal allowable mine rock exposing space numerical value analysis of a hydraulic single body support gridding of the test mining field; and carrying out numerical value analysis on the mine pressure and the mining optimization of the test mining field. A single hydraulic support and a comprehensive mining method mining technology are combined to create a novel recovery process of a slowly-inclined thin ore; and the hydraulic support is used for replacing a natural ore column to recover the ore to the greatest extent, so that the recovery rate of the bauxite ore is improved, the consumption amount of pit woods is reduced and the production efficiency is improved. According to the method disclosed by the invention, the safe production is realized, the cost is saved, the benefit is increased and the service life of a mine is prolonged.

The invention relates to a tunnel blasting excavation method, in particular to an underpass superhighway tunnel trunk excavation static blasting construction method. Trunk excavation and support include the following steps of pilot tunnel ahead ductile grouting pre-supporting, left or right pilot tunnel upper half section excavation, left or right pilot tunnel upper half section preliminary supporting, left or right pilot tunnel lower half section excavation, left or right pilot tunnel lower half section preliminary supporting, main tunnel ahead ductile grouting pre-supporting, main tunnel upper annular excavation, main tunnel arch pre-supporting, main tunnel middle core soil excavation, main tunnel inverted arch partial excavation, main tunnel inverted arch pre-supporting, main tunnel inverted arch pouring, and using a static blasting method for construction. By means of the underpass superhighway tunnel trunk excavation static blasting construction method, damage to tunnel preliminary supporting and the adverse effect on stratum by blasting vibration are reduced, existing structures are protected, and safety production is achieved.

The invention discloses a continuous flow photochemical reactor, which comprises a reaction chamber for photochemical reaction, a temperature control chamber for temperature control of the reaction chamber and a light source control chamber for light source regulation. Specifically, the reaction chamber comprises a shell and a reactor module located in the shell, and the reactor module comprises a photochemical reaction unit, a light source module arranged outside the photochemical reaction unit, a light source heat dissipation module and a reactant temperature control module. Specifically, the reactor module comprises a reaction bin plate, a quartz glass board, a quartz plate fixed cover plate and a light source plate that are stacked sequentially. The continuous flow photochemical reactor not only can realize all-range photochemical reaction in all-ultraviolet band and visible light band, but also has the advantages of compact structure, small volume, good sealing performance, high product yield, large output, long service life, convenient maintenance, highly controllable temperature and reaction process, is suitable for industrial application, and meets the requirements of green chemical pharmacy.

The invention relates to a control method for free oxygen in ultralow-carbon and low-aluminum steel. The ultralow-carbon and low-aluminum steel production technology includes molten iron pretreatment,converter smelting, RH furnace vacuum refining and continuous casting. Powder spraying desulfuration is adopted in molten iron pretreatment, converter boiling and tapping are conducted, top slag modification is conducted, RH refining is conducted, decarburization and deoxygenation are finished, the weight percent of the free oxygen in the steel is finally controlled to range from 0.002% to 0.005%, and the weight percent of Als is smaller than or equal to 0.003%. By means of the control method, safety production of a continuous casting machine can be achieved, a casting blank is free of defects in quality, and the continuous casting furnace number is three or more.

The invention discloses an unattended automatic driving system for a gas high-outburst roadway. The unattended automatic driving system comprises an intelligent mining drill carriage and a remote control system for controlling the intelligent mining drill carriage. The intelligent mining drill carriage comprises a power system and an execution system driven by the power system. The execution system comprises a track-type rotating chassis, a supporting plate, two vertical columns, two fixing plates, corner lifting oil cylinders and a rod-replacing drilling system. The functions of automatic positioning hole-drilling, automatic drill-up, automatic drill connection, automatic drilling, automatic monitoring, intelligent identification and processing, automatic drill detaching and the like canbe achieved; mechanical, intelligent and unattended driving hole-drilling is achieved; casualty accidents caused by outburst of coal and gas in the coal roadway driving process are avoided; and intrinsically-safe production of driving of the gas high-outburst roadway is formed, the current situation of frequent major and extraordinarily-serious gas outburst accidents in the mine driving period inChina is turned around fundamentally, and safety production of gas high-outburst mines is achieved.

The invention discloses a Trichoderma harzianum strain, and its application in the control of potato late blight. The Trichoderma harzianum strain HNA-14 provided in the invention has a preservation number of CGMCC No.5990. The Trichoderma harzianum strain HNA-14 can be used for inhibiting pathogens, promoting the growth of potato plants, and controlling the potato late blight generation of the potato plants. The Trichoderma harzianum strain has a wide application prospect in the sustainable agriculture development.

The invention relates to a rock drivage process for a four-arm hydraulic drill rig and a breaking-loading-transporting-guniting integrated machine. The process is mainly characterized by adopting the four-arm hydraulic drill rig to carry out porthole drilling, hole supporting and anchor bolt and cable supporting, and adopting a rock breaking-loading-transporting-guniting integrated machine combining the functions of rock breaking, rock loading, rock transporting and guniting to cooperate to complete rock operation. The process comprises the specific steps of hole drilling, charging, blasting, temporary supporting, supporting, guniting and the like, and the four-arm hydraulic drill rig and the rock breaking-loading-transporting-guniting integrated machine alternately go into a rock driving face area to perform construction operation in the rock drivage process. The process adopts advanced technical equipment, makes the improvement on the existing rock drivage technology, entirely realizes the comprehensive mechanical operation for rock construction, and has the obvious advantages of improving rock drivage footage level, reducing labor intensity of workers, saving human power, raising efficiency, improving field operating environment, reducing the occurence of occupational diseases, effectively ensuring safe production and the like.

The invention relates to the safety monitoring technology and discloses a safety monitoring system. The safety monitoring system comprises sensors, wherein the sensors are arranged at a plurality of monitoring points in a chemical production workshop, a plurality of sensors are connected with a workshop controller, the workshop controllers of a plurality of different chemical production workshops are respectively connected with a general scheduling controller, and the general scheduling controller is connected with a display, a warner, a microphone and loudspeakers arranged in each chemical production workshop. The safety monitoring system has the advantages that various types of sensors are arranged in workshop work fields, in addition, collected information is transmitted to a remote controller, the real-time monitoring on the audio/video state of the workshop work fields and the real-time monitoring on whether poisonous and harmful gas leakage conditions exist or not are realized, corresponding warning information is given, the safety handling of the workshop work fields is carried out in real time, the poisonous and harmful gas harm to workers is avoided, and the safe production is realized.