77 results about "Oxidation zone" patented technology

The invention discloses a sludge low-temperature oxidation treatment system and method. The system comprises a pretreatment unit, a feed lifting mechanism, a low-temperature oxidation furnace, a flue gas purification unit and an automatic control unit. The low-temperature oxidation furnace is divided into a feeding area, a low-temperature oxidation area and an air distribution and slag discharge area from top to bottom, an air distribution plate is provided with air outlets which are uniformly arrayed, the temperature of the low-temperature oxidation area is controlled to be 420-480 DEG C, and generation of dioxin is inhibited from the source. The pretreatment unit is used for mixing sludge, biomass and quartz sand to form a loose breathable material to prevent the sludge from hardening; the method comprises the steps of material mixing, continuous feeding oxidation, temperature closed-loop regulation and control, flue gas purification and ash treatment, high-water-content municipal sludge can be stably treated, the energy consumption is low, the dioxin generation amount is low, flue gas emission reaches the standard, ash can be recycled, and the method is suitable for large-scale municipal sludge harmless treatment.

The invention relates to a magnetic coagulation and sedimentation integrated device carrying a magnetic sedimentation technology. The magnetic coagulation and sedimentation integrated device comprises a water inlet reaction zone, an inclined tube sedimentation zone, a magnetic sedimentation zone, an oxidation zone and a magnetic recovery assembly, the water inlet reaction area comprises a water inlet reaction area first grid, a water inlet reaction area second grid, a water inlet reaction area third grid and a water inlet pipe; the inclined tube settling zone comprises an upper-layer long inclined tube, a lower-layer short inclined tube, a water outlet groove and a water inlet channel; the magnetic settling area comprises a traveling sludge discharging machine, an electromagnet and a mud baffle on the electromagnet; the oxidation zone comprises a first oxidation zone grid, a second oxidation zone grid, a third oxidation zone grid and a water outlet pipe; the magnetic recovery assembly comprises a magnetic separator, a high shearing machine, a sludge return pipe and a sludge discharge pipe. Compared with the prior art, the magnetic coagulation sedimentation, magnetic sedimentation, magnetic seed recovery and tail water oxidation technologies are integrated, the coagulation time is greatly shortened, and the starting time and the sedimentation time of the sedimentation device are shortened; the precipitation effect is improved; the sludge moisture content is reduced; the magnetic seed recovery rate is high.

The invention discloses a physical adsorption and biological denitrification combined river channel overflow port treatment process which is characterized in that a water inlet tank, a first-stage filtration and oxidation zone, a second-stage filtration and oxidation zone, a third-stage filtration and oxidation zone and a fourth-stage filtration zone are sequentially arranged from upstream to downstream along the water flow direction of a river channel; the first-stage filtration and oxidation area is provided with a first-stage filler bin and a first-stage contact oxidation bin, the second-stage filtration and oxidation area is provided with a second-stage filler bin and a second-stage contact oxidation bin, and the third-stage filtration and oxidation area is provided with a third-stage filler bin and a third-stage contact oxidation bin; the filler bins in the first-stage filtration and oxidation zone, the second-stage filtration and oxidation zone and the third-stage filtration and oxidation zone are provided with phosphorus removal ceramsite fillers; the fourth-stage filtering area is filled with an activated carbon filler layer and is used for further purifying the effluent. The occupied area can be reduced, the outlet water treatment efficiency of the discharge port is improved, and the operation cost is reduced.

The invention discloses a classified grouting reinforcement method for a wind oxidation zone of a lignite mining roof, and relates to the technical field of coal mining, the method comprises the following steps: obtaining the average wind oxidation zone thickness, the water inflow and the average natural gamma value covering each weighting step section on a lignite mining working surface to be mined; according to the average wind oxidation zone thickness, the water inflow and the average natural gamma value corresponding to each weighting step section, a set number of drilling points are determined on the lignite mining working face; the drilling leakage amount of each drilling point is obtained; based on the data of each drilling point, determining the function relationship between the drilling leakage amount and the average wind oxidation zone thickness, the water inflow amount and the average natural gamma value; according to the function relation, the drilling leakage amount of each weighting step section is determined; dividing the drill hole leakage amount of each weighting step section into a plurality of grades of slurry eating areas; and different grouting technologies are adopted for grouting reinforcement of the slurry eating areas of all the grades. Top plate accidents can be reduced, grout leakage is reduced, in addition, the grouting cost is reduced simply.

The application discloses a sludge low-temperature oxidation treatment system and method thereof, and the system comprises a pretreatment unit, a feeding lifting mechanism, a low-temperature oxidation furnace, a flue gas purification unit and an automatic control unit. The low-temperature oxidation furnace is divided into a feeding area, a low-temperature oxidation area and a wind distribution and slag discharge area from top to bottom, the wind distribution plate is provided with a uniform array of air outlets, the temperature of the low-temperature oxidation area is controlled in the range from 420 DEG C to 480 DEG C, and the generation of dioxin is inhibited from the source. The pretreatment unit mixes the sludge, biomass and quartz sand to form loose and breathable materials, so that the sludge is prevented from being hardened. The method comprises material mixing, continuous feeding oxidation, temperature closed-loop regulation and control, flue gas purification and ash and slag treatment. The application can stably treat municipal sludge with high water content, has low energy consumption and low dioxin generation, flue gas emission meets the standard, ash and slag can be recycled, and is suitable for large-scale harmless disposal of municipal sludge.

The invention discloses a sandstone type uranium mine typical interlayer oxidation zone zoning identification method based on a convolutional neural network, and the method comprises the following steps: 1, obtaining a rock core cross section image, determining a zoning label and a granularity label, and making a sample data set; 2, preprocessing by adopting a digital image technology, and dividing into a training set and a test set; 3, constructing and training a model: selecting a visual classification neural network model, and starting deep learning training of the model by using the preprocessed training set; 4, evaluating a model training result, selecting an optimal prediction model, and verifying the optimal prediction model by adopting a cross validation method; and step 5, applying model prediction. According to the method, the acquired image can be identified through the convolutional neural network to judge the category and granularity in the interlayer oxidation zone to which the image belongs, so that the technical problem that the sandstone type uranium ore zone is not accurately identified manually in the prior art is effectively solved, and the identification efficiency and accuracy are effectively improved.

The invention discloses a mine fire intelligent monitoring and early warning auxiliary method and system, and the method comprises the following steps: S1, determining a monitoring point in a mine, arranging a sensor at a set position for detecting the condition of a mine region, and arranging a fault detector for carrying out the fault detection of the arranged sensor; according to the invention, a plurality of sensors are arranged to monitor the gas composition, concentration, hidden fire source, residual coal accumulation amount, wind speed and temperature change conditions in the oxidation zone, so that the factors of fire occurrence can be effectively and comprehensively analyzed in real time, the intelligent degree is improved, early warning and fire extinguishing treatment can be carried out in time when abnormity occurs, and the safety of the system is improved. The monitoring accuracy is improved, the potential safety hazard of a fire disaster is reduced, fault detection can be performed on the sensor in the monitoring process, and when a fault occurs, a person is reminded to handle the fault in time, so that the situation that the person having the fault of the sensor cannot know the influence on the monitoring accuracy in time can be effectively reduced.

The application discloses a coal seam water inrush danger monitoring method and system based on repeated disturbance in an ecological fragile area, and relates to the technical field of mine water disaster prevention and control. The method comprises the following steps: comprehensively determining engineering geological conditions according to the vertical depth of the wind oxidation zone and the coal seam characteristic parameters; performing numerical simulation by using a numerical model; based on the positions of the fan lanes of the coal seam working faces in the mine field exploration line graph, determining the water prevention and isolation coal rock pillar setting under repeated disturbance of the coal seam working face near the ecological fragile area coal seam hidden outcrop by using the development heights of the two zones and the height inhibition coefficients of the wind oxidation zone two zones when the coal seam working faces are mined for different lengths, and monitoring the water inrush danger of the working face according to the roof failure characteristics of each working face in the regional roadway. The application can realize real-time and accurate water inrush danger monitoring of the working face near the coal seam hidden outcrop.

The invention provides a sandstone type uranium ore enrichment area sweet spot prediction method comprising the following steps: obtaining field core catalog and drilling information, and establishing a uranium-bearing rock series stratigraphic framework; according to the uranium-bearing rock series stratigraphic framework, uranium reservoirs, redox layers and mineralization data of all the drilling positions are obtained and imported into geological drawing software, and spatial distribution diagrams of the uranium reservoirs, reduced geologic bodies, interlayer oxidation zones, surface ore, mineralization layers and industrial ore are generated; superposing the spatial distribution diagrams of the outside-surface ore, the mineralization layer and the industrial ore with the spatial distribution diagrams of the uranium reservoir, the reduced geologic body and the interlayer oxidation zone respectively, and establishing spatial configuration relationships between the outside-surface ore, the mineralization layer and the industrial ore and the uranium reservoir, the reduced geologic body and the interlayer oxidation zone respectively; the prospecting mark of the rich ore body is tracked according to the spatial configuration relation of the outside-surface ore, the mineralization layer and the industrial ore with the uranium reservoir, the reduced geologic body and the interlayer oxidation zone, the uranium ore enrichment area sweet spot prediction is performed according to the prospecting mark, and the uranium ore exploration accuracy and efficiency are improved.

The invention belongs to the technical field of coal mine underground fire prevention and extinguishing, and particularly discloses a method for preventing spontaneous combustion of a coal pillar in small coal pillar mining. The parameters comprise the working face mining coal seam shortest spontaneous combustion period, the goaf coal spontaneous combustion oxidation zone on-site measurement air inlet and return side average width, the coal face actual daily propulsion degree and the small coal pillar thickness; based on the parameters, the distance L between the drill hole groups is determined; drilling the adjacent goaf every L in the roadway of the stope face along the mining direction of the stope face to form a plurality of drill hole groups which are distributed at intervals; and a gelling agent is injected into the triangular non-caving area through the drilling hole set, and a plurality of filling isolation bodies distributed at intervals are formed in the triangular non-caving area. The multiple filling isolation bodies distributed at intervals are arranged in the triangular non-caving area, the air leakage channel is blocked through the filling isolation bodies, the spontaneous combustion oxygen supply condition is cut off, and the spontaneous combustion problem is effectively restrained.

The present application belongs to the technical field of coal spontaneous combustion prevention and control in the goaf of underground coal mining face, and specifically relates to a multi-point self-feedback inerting integrated variable frequency injection and spraying fire prevention and extinguishing method for the goaf of coal mine. The method comprises the following steps: calculating the required nitrogen injection flow for fire prevention and extinguishing in the goaf of working face; calculating the required amount of retardant to be sprayed in each cycle of inerting fire prevention in the goaf of working face; performing injection and spraying operation according to the injection amount and retardant amount calculated in steps 1 and 2 respectively as one injection and spraying cycle per shift; determining the oxygen content of each monitoring point of the goaf tube; calculating the average oxygen concentration of the oxidation zone of the goaf according to the oxygen content of each monitoring point, and then calculating the new nitrogen injection flow to correct the nitrogen injection flow in step 1, and adjusting the nitrogen injection flow of the injection and spraying system in step 3 to perform injection and spraying operation; monitoring the CO and C2H4 gas concentrations in real time during injection and spraying operation; if the CO and C2H4 gas concentrations exceed the standard, dynamically adjusting the nitrogen injection flow and the retardant concentration to perform injection and spraying operation.

The invention relates to the technical field of coal mining, and discloses a compact filling novel advancing type comprehensive mechanized mining method which comprises the following steps: pre-digging cutting holes along upper and lower mountain coal pillars of a mining area to form a production system of an advancing type working face; the coal mining machine, the scraper conveyor and the reversed loader are linked to stope the solid coal; an inorganic non-combustible paste material is continuously injected into the mined-out area after stoping through a pipeline, the whole section is densely filled, and the uniaxial compressive strength of the paste material is larger than or equal to 3.5 MPa after the paste material is solidified for 28 days; according to the novel compact-filling advancing type comprehensive mechanical mining method, through full-section compact filling of the goaf and use of the inorganic non-combustible paste material, the air leakage rate can be reduced by 90% or above, and a residual coal oxidation zone is shortened to be within 5 m. Through closed-loop control of distributed optical fiber temperature measurement and laser displacement monitoring, the risks of high-temperature cracking and sudden weighting are eliminated.

The invention discloses a method and a system for measuring the diffusion radius of nitrogen injected in a goaf, and belongs to the technical field of safe mining of coal mines. Comprising the steps that beam tube monitoring points are arranged on the air inlet side and the air return side of a goaf, the oxygen concentration of each monitoring point is monitored in real time, and the advancing distance and nitrogen injection process parameters of a working face are synchronously recorded; the nitrogen injection process parameters comprise the nitrogen injection flow and the embedding position of a nitrogen injection port; extracting oxygen concentration data under a non-nitrogen injection condition, establishing a function relationship of the oxygen concentration along with the change of the advancing distance of the working face through linear fitting, and calculating a corresponding heat dissipation band termination position when the oxygen concentration is reduced to a first preset threshold value based on the function relationship; acquiring oxygen concentration data of the goaf under the specific nitrogen injection flow, and determining a corresponding post-nitrogen-injection heat dissipation zone termination position and a corresponding post-nitrogen-injection oxidation zone termination position when the oxygen concentration is reduced to a first preset threshold value; and calculating the difference value between the termination position of the heat dissipation belt and the termination position of the heat dissipation belt after nitrogen injection to obtain the nitrogen diffusion radius under the nitrogen injection flow.

The invention discloses a comprehensive recovery method of nickel-cobalt-containing matte, and relates to the technical field of non-ferrous metal metallurgy, and the method comprises the following steps: step 1, oxidation blowing: adding nickel-cobalt-containing matte into an oxidation zone of a double-zone converting furnace, adding a mixed flux, blowing high-speed oxygen flow by a top-blowing spray gun, and controlling the flux rate to be 3-5% to obtain crude copper and blowing slag floating on the upper layer; the converting slag overflows into a reduction area through the upper portion of the partition wall, oxygen-enriched air, fuel and a vulcanizing agent are blown in through a side-blowing spray gun, the mass ratio of the vulcanizing agent to the hot slag is controlled to be 20-30%, the coal rate is controlled to be 3-5%, the oxygen concentration is controlled to be 25-40%, the volume ratio of CO / (CO + CO2) in smoke is controlled to be 40-70%, and after smelting is conducted for 2.5-3 h, high-nickel-cobalt matte and reducing slag are obtained. According to the method, the nickel and cobalt elements in the converting slag are directly enriched into the high-nickel-cobalt matte in the same smelting device, the problem that the Ni and Co elements are circularly enriched in the system along with the slag is solved, and meanwhile comprehensive recovery of the Ni and Co elements is achieved.

The utility model discloses an iron catalysis advanced oxidation synergetic phosphorus removal device for wastewater treatment. The iron catalysis advanced oxidation synergetic phosphorus removal device comprises an oxidation zone, a neutralization zone, a flocculation zone and a settling zone, the oxidation zone is provided with a water inlet pipe, an acid dosing pipe, a ferrous dosing pipe, a Venturi mixer, an oxidant dosing pipe, an energy dissipation mixing paddle and a first guide cylinder; the neutralization area is provided with a lime milk dosing pipe; the flocculation zone is provided with a second guide cylinder and a PAM dosing pipe; the settling zone is provided with an inclined tube filler, a sludge scraper, a sludge hopper, a sludge discharge pump, an effluent weir and a water collecting tank; and the iron powder catalyst recycling machine is arranged above the first guide cylinder. According to the utility model, the problems that the traditional Fenton technology is large in medicament dosage and low in catalytic oxidation efficiency are solved; by adopting a lime milk solution dosing scheme, the method has the effects of adjusting the pH value, removing phosphorus and enhancing flocculation, and solves the problems that a catalyst cannot be recycled, the medicament utilization efficiency is low, the medicament cost is high and the iron sludge flocculation effect is poor in a traditional scheme.

The utility model discloses module quick-splicing type discharge port ecological treatment equipment which comprises a reinforced concrete foundation, and a water inlet tank, a first-stage filtering and oxidizing area, a second-stage filtering and oxidizing area, a third-stage filtering and oxidizing area and a fourth-stage filtering area which are sequentially arranged on the reinforced concrete foundation from upstream to downstream, the first-stage filtration and oxidation area is provided with a first-stage filler bin and a first-stage contact oxidation bin, the second-stage filtration and oxidation area is provided with a second-stage filler bin and a second-stage contact oxidation bin, and the third-stage filtration and oxidation area is provided with a third-stage filler bin and a third-stage contact oxidation bin; the water inlet tank, the first-stage filtering and oxidizing area, the second-stage filtering and oxidizing area, the third-stage filtering and oxidizing area and the fourth-stage filtering area are all of independent standard module structures and are mounted on a reinforced concrete foundation through splicing. And compared with a traditional three-pond two-dam technology, the occupied area is reduced, the efficiency is improved, and the impact resistance is enhanced.

A method for heating a steel sheet includes heating a front surface side and a rear surface side of a steel sheet that is passing through a direct fired furnace that has an oxidation zone where operation is conducted at an air ratio of 1 or more and a reduction zone where operation is conducted at an air ratio of less than 1, in which the heating is carried out with flames injected from at least one slit burner while the steel sheet passes through at least the oxidation zone.

The present invention discloses a goaf fire prevention and extinguishing method based on airflow distribution and dry ice phase transition. The method comprises the following steps: measuring the airflow intersection between the goaf and the coal mining face; laboratory testing the impact range of dry ice sublimation into CO2 gas; placing dry ice in the goaf; and, during mining, after the goaf roof collapses, the coal and rock in the goaf roof fall onto an insulated box containing dry ice, causing the box to rupture. The dry ice is buried by the coal and rock in the goaf roof and sublimates to form CO2 gas, which diffuses around the goaf to extinguish the fire. By arranging the dry ice-filled insulated boxes parallel to the coal mining face and dividing them into sections based on airflow intersection within the goaf, the present invention ensures that the CO2 gas generated by the sublimation of the dry ice is uniformly distributed within the goaf. The dry ice in the insulated boxes does not undergo phase transition when in the heat dissipation zone, but sublimates when in the oxidation zone, the most susceptible area for spontaneous combustion, after being broken apart by the falling coal and rock in the goaf roof. This achieves precise fire prevention and extinguishing.

The present application belongs to the field of clean combustion of coal and collaborative disposal of industrial solid waste, and discloses a coal and red mud collaborative denitration and desulfurization clean combustion method and a boiler system, aiming to solve the technical problems of high cost of denitration and desulfurization of traditional coal-fired boiler and difficulty in utilization of red mud. Through a double-furnace series structure and a staged air distribution system, a partitioned atmosphere is constructed in the furnace, realizing in-situ integration of denitration in the reduction zone and desulfurization in the oxidation zone. The strength of the reduction atmosphere is enhanced by relying on atomized water to strengthen the water gas reaction, and the material residence time and the catalyst life are prolonged by cooperating with the countercurrent contact of the porous particles of red mud and the two-stage circulation. Meanwhile, the iron oxides in the red mud are in-situ reduced and magnetized in the furnace, and a high-purity ferroferric oxide product is obtained through crushing and magnetic separation at the furnace bottom. The present application realizes multiple goals of in-situ low-cost clean combustion of coal, large-scale consumption of red mud and high-value resource utilization, and brings environmental and economic benefits.

The application discloses a kind of intelligent spraying systems of mine goaf three-zone resistance agent, including monitoring unit, control unit, spraying pipeline and resistance agent preparation device;Monitoring unit includes three respectively arranged in asphyxia zone, oxidation zone and heat dissipation zone's beam tube monitoring device;Resistance agent preparation device is provided with at least two preparation cavities, each preparation cavity is provided with stirrer and discharge port;Spraying pipeline includes main pipe, with preparation cavity one-to-one corresponding feed pipe and three feed pipes, feed pipe one end with corresponding preparation cavity discharge port communication, the other end is all with the one end of main pipe communication, each feed pipe one end with the other end of main pipe communication;Three feed pipes the other end is respectively into goaf three-zone and is all installed with spray head;Control unit includes industrial computer and PLC programmable controller;Each feed pipe and each feed pipe are all provided with solenoid valve.The application realizes the intelligent spraying of goaf three-zone resistance agent.

The purpose of the present invention is to manufacture a galvanized steel sheet having stable quality without plating failure. A method for heating a steel sheet, said method being characterized in that: the front surface side and the rear surface side of the steel sheet passing through a direct-fire heating furnace having an oxidation zone in which operation is performed under the condition of an air ratio of 1 or more and a reduction zone in which operation is performed under the condition of an air ratio of less than 1; and at least during the period of passing through the oxidation zone, heating is performed by using flames ejected from more than one slit type combustor.

The invention provides a method for extracting rhenium from tungsten-molybdenum-rhenium alloy waste, which comprises the following steps: a three-temperature-zone tubular furnace comprises a high-temperature oxidation zone, a gas phase transition zone and a concentrated deposition zone, the temperature of the high-temperature oxidation zone is 600-900 DEG C, the temperature of the gas phase transition zone is 360-420 DEG C, and the temperature of the concentrated deposition zone is 25-150 DEG C; the three-temperature-zone tubular furnace is connected with oxygen-containing gas, the oxygen-containing gas sequentially passes through a high-temperature oxidation zone, a gas-phase transition zone and a centralized deposition zone, tungsten-molybdenum-rhenium alloy powder is placed in the three-temperature-zone tubular furnace, oxidation reaction is carried out in the high-temperature oxidation zone to obtain rhenium oxide, and the rhenium oxide is placed in the centralized deposition zone through airflow; the rhenium oxide and the tungsten-molybdenum oxide can be effectively separated through the high-temperature oxidation zone and the gas-phase transition zone, the purity of the rhenium oxide is improved, and separation of rhenium, molybdenum and tungsten is effectively achieved.

The utility model discloses a sulfur recovery tail gas treatment device. The sulfur recovery tail gas treatment device comprises a main body assembly, wherein the main body assembly comprises a device body and an exhaust inlet; the exhaust inlet is fixedly connected to the rear end of the device body; the treatment assembly comprises an absorption area and an oxidation area; the absorption area is arranged at the upper end of the interior of the device body, the oxidation area is arranged at the middle end of the interior of the device body, and the treatment assembly further comprises a neutralization area; the neutralization area is arranged at the lower end of the interior of the device body, gypsum and calcium carbonate are arranged in the neutralization area, the absorption area is arranged above the oxidation area, the oxidation area is arranged above the neutralization area, and the main body assembly further comprises an exhaust outlet and a filter screen plate. The problems that according to an existing desulfurization system, sulfur recovery tail gas is complex in component, large in flue gas amount and difficult to treat, the flue gas is directly discharged into the atmosphere to pollute the environment, and environmental protection parameters of the desulfurization system frequently exceed the standard due to the fact that the desulfurization system is connected for treatment at present are solved.

The invention discloses a sandstone type uranium ore prospecting method based on a fault subsidence boundary fault, and belongs to the technical field of uranium ore geological exploration. Comprising the following steps: S1, determining an underground geological structure; s2, determining fault subsidence and fault types; s3, determining the type of an oxidation zone; s4, determining the type of a gray sand body; s5, forming prediction element combination type codes; s6, determining the type of the favorable area; and S7, determining the accurate position of the favorable area, and realizing prospecting prediction. The method is an efficient and reliable prospecting technical method for the sandstone-type uranium ore, is a high summary of latest prospecting results of the sandstone-type uranium ore by analyzing deep fault subsidence and guiding shallow prospecting, and is high in directivity for prospecting work; different from traditional perceptual prospecting cognition, geological elements are coded and combined, natural element digitization is achieved, mathematical calculation is introduced into prospecting work, and the method is more scientific, more reliable and high in operability; as a specific operable prospecting method, the prospecting efficiency and the prospecting rate can be effectively improved.

The invention belongs to the technical field of sandstone-type uranium ore geological exploration, and particularly relates to a sandstone-type uranium ore interlayer oxidation zone front line detection method, which comprises the following steps of: firstly, preliminarily drawing an interlayer oxidation zone front line based on the oxide condition of rock, and then correcting the interlayer oxidation zone front line twice according to the radiation quantity analysis of a sample and a uranium radium balance coefficient, compared with an existing uranium mine interlayer oxidation zone front line detection method, the method has the advantages that the interlayer oxidation zone front line can be efficiently and rapidly detected, and the time cost and the capital cost are saved.

The invention relates to the field of coal mining, in particular to a Y-shaped ventilation working face goaf oxidation zone continuous nitrogen injection device and method.The Y-shaped ventilation working face goaf oxidation zone continuous nitrogen injection device comprises a bearing frame, one side and the top of the bearing frame are open, walking wheels are symmetrically arranged on the side portions of the bearing frame, and an adjusting assembly is slidably installed in the middle of the inner side wall of the bearing frame; a cleaning assembly is arranged on the side portion of the adjusting assembly, a driving assembly is arranged on the side portion of the cleaning assembly, and the problems that in the traditional mode of injecting nitrogen into the goaf oxidation zone, cost is high, the pore-forming rate is low, blockage is prone to occurring, and it cannot be guaranteed that nitrogen release is always in the goaf oxidation zone are solved.

The invention discloses an ecologically fragile area coal seam water inrush danger monitoring method and system based on repeated disturbance, and relates to the technical field of mine water disaster prevention and control. The method comprises the following steps: comprehensively determining engineering geological conditions according to the vertical depth of a wind oxidation zone and coal seam characteristic parameters; performing numerical simulation by using the numerical model; based on the position of a fan roadway of each coal seam working face in a well field exploration diagram, the water-proof and waterproof coal and rock pillar setting under repeated disturbance of coal mining near a coal seam hidden outcrop in the ecologically fragile area is determined by utilizing the development heights of two zones and the height inhibition coefficients of two zones of a wind oxidation zone when the coal seam working faces are mined with different lengths; and monitoring the water inrush risk in the regional roadway according to the damage characteristics of the inclined mining roof of each working face. According to the invention, real-time and accurate monitoring of the water inrush danger of the working face near the coal seam hidden outcrop can be realized.

The invention belongs to the technical field of mine underground water disaster prevention and control, and particularly relates to a thin bedrock coal seam overlying stratum water disaster ground area treatment method which comprises the following steps: performing area treatment by adopting construction ground directional drilling grouting to block a potential water and sand bursting channel; two ground directional hole groups are arranged in a treatment range, the two ground directional hole groups are respectively a hole group D1 and a hole group D2, the hole group D1 comprises seven branch holes, maneuvering branch holes and oblique crossing test branch holes in a three-opening manner, and the hole group D2 comprises four branch holes and maneuvering branch holes in a three-opening manner; oriented branch drill holes are constructed at the position 5-10 m below a wind oxidation zone in the working face open-off cut direction at equal intervals, and high-pressure grouting is carried out, so that the purposes of reinforcing a fault zone, strengthening a protective layer and blocking potential water and sand bursting channels are achieved, and the problem of water disaster treatment of the overlying strata of the thin bedrock coal seam is solved.

The invention relates to the technical field of absorption and oxidation equipment, and particularly discloses absorption and oxidation integrated equipment which comprises an oxidation tank main body, a partition plate is arranged on the inner wall of the oxidation tank main body, the oxidation tank main body is divided into an absorption area and an oxidation area which are distributed up and down through the partition plate, and the partition plate penetrates through and is fixedly provided with an exchange pipe; the exchange pipe is used for communicating the absorption area with the oxidation area, an ammonia inlet pipe for conveying ammonia to the absorption area is arranged at the top end of the oxidation tank main body, a baffle is arranged in the absorption area, an ammonia adding area is defined by the baffle and the side wall of the oxidation tank main body, and the ammonia inlet pipe is matched with the ammonia adding area. According to the invention, a partition structure is arranged in the oxidation tank, an ammonia adding structure is simplified in the absorption area, the occupied area is saved, an automatic simplified liquid level balancing device is arranged, the layering of components is ensured, the failure rate is reduced, and the oxidation desulfurization efficiency of the desulfurization absorption liquid is improved.

The invention discloses a method for constructing and developing a working face to liberate shallow security coal pillar resources, which comprises the following steps of: 1, analyzing mining conditions, and determining a roof water prevention and control thought: determining a water prevention and control thought of grouting transformation; 2, grouting transformation objects and range are determined, wherein the grouting transformation objects are a water-containing sand layer at the bottom of the unconsolidated formation, a wind oxidation zone and the top of a key fault; 3, drilling and grouting construction parameters are determined; 4, engineering construction and dynamic scheme optimization are conducted, specifically, a grouting P-Q-T dynamic curve is drawn, and scheme design is adjusted; and step 5, engineering effect inspection and evaluation. According to the method, comprehensive grouting transformation is conducted on the unconsolidated formation bottom containing, wind oxidation zone and fault structure, the roof aquifer within the mining influence range is transformed into a relative water-resisting layer, meanwhile, a fault water and sand inrush channel is blocked, the stability of roof surrounding rock is improved, three forming conditions of a water and sand source, water pressure and an inrush channel are destroyed, and the mining effect is improved. And dual disaster prevention and control of a source and a channel are realized.