219 results about "Coal field" patented technology

The invention relates to a mining method of a nearly horizontal mineral deposit of an opencast coal field by casting and internally dumping and belongs to the mining method of the opencast coal field. The mining method comprises the following steps: (1) dividing a strip mine into a plurality of mining regions, mining overburdened materials of a first strip region, and stacking the overburdened materials outside an opencast mining limit; (2) dividing an overburdening table into one or more tables to be mined; (3) discharging the overburdened materials of a second strip region into a worked-out section of the first strip region after a mineral deposit exposed in the first strip region is mined, and transporting mined mineral products out of a mining field through entering-exiting channel transporting passages arranged on two sides of a channel or the middles of the strip regions. The mining method has the advantages that as the overburdened materials can be discharged and abandoned in the worked-out section, the occupied land of an externally-dumped soil site can be saved; the mining method is environment-friendly and is capable of restoring the land influenced by the mining operation during mining; abandoned and unserviceable lands in barren and mountainous mines can be changed into usable lands.

The invention discloses a coal bed gas catalytic deoxidation technique in coal field, which adopts a multistage reactor for multilevel catalytic deoxidation reaction to control the temperature of gas at the inlet of every stage of reactor and the content of O2 in the gas at the inlet, so as to ensure the temperature of gas at the outlet of every stage of reactor to be less than or equal to 660 DEG C after the catalytic deoxidation reaction. Compared with an individual reactor, the deoxidation technique of the invention can greatly reduce the quantity of the gas that is taken as return gas and used for diluting O2 in the coal bed gas of the raw materials, thus reducing the energy consumption; meanwhile, the temperature of the gas at the outlet of the deoxidation reactor can be effectively controlled to be lower than 660 DEG C, the cracking of methane can be reduced, and the loss of the methane can be obviously lowered.

The invention discloses a method and device for monitoring a coal field fire zone. The method for monitoring the coal field fire zone comprises the steps that a hyperspectral thermal infrared image of a target zone on the ground is obtained; thermal radiation information of an object in the target zone is obtained through the hyperspectral thermal infrared image of the target zone; a temperature abnormal zone in the target zone is obtained according to the thermal radiation information of the object in the target zone; the position of the coal field fire zone in the hyperspectral thermal infrared image is determined through the temperature abnormal zone in the target zone. According to the method and device for monitoring the coal field fire zone, the problem that the position of the coal field fire zone cannot be accurately monitored in the related technology is solved.

The invention discloses a heat energy sustainable utilization and coal fire control system and method for a coal field fire zone. The system is composed of a vacuum liquid tank, a cooler, a cooling fan, horizontal drill holes, a high-temperature-resistant circulating pump, a thermoelectric power generation module, a voltage stabilizing and increasing module, a storage battery and an inverter. The main operating method includes the steps that the coal field fire zone is isolated with a machine excavation method, the horizontal drill holes are formed in the independent coal field fire zone, a heat carrier absorbs heat in the fire zone through the horizontal drill holes to become a high-temperature heat carrier, the high-temperature heat carrier enters the vacuum liquid tank under the action of the high-temperature-resistant circulating pump, and the thermoelectric power generation module at the bottom of the vacuum liquid tank generates power with the temperature difference between the top end and the bottom end of the thermoelectric power generation module. By means of the system, the heat of the coal field fire zone can be cyclically and sustainably extracted through the heat carrier, heat energy is converted into electric energy through thermoelectric power generation, and thus resource waste is reduced; meanwhile, fire source spreading is prevented by isolating the coal field fire zone, the dual effects of waste energy recycling and coal fire control are achieved, and the system has high practicability.

A multi-stage atomization type two-phase flow water mist generation device for controlling a coal field fire is suitable for managing a coal-rock cavity high-temperature zone in a large-area coal field fire zone.The device comprises a pressure water supply pipe, a multi-hole nozzle and a jet flow atomization barrel.An impact atomization chamber, a mixing acceleration chamber and a diffusion jet chamber are arranged in the jet flow atomization barrel in sequence.The end, close to the multi-hole nozzle, of the impact atomization chamber is provided with a hemispheric inner wall, and the inner wall is provided with a slant conical air suction hole so that the impact atomization chamber can be communicated with the external environment.Pressure water supplied by the pressure water supply pipe is preliminarily atomized through the multi-hole nozzle; external air is automatically sucked into the impact atomization chamber under negative pressure generated by jet flow of the nozzle to collide with mist flow formed in preliminary atomization, and secondary atomization is achieved; then, the mist flow and the air are further mixed and rubbed in the mixing acceleration chamber, and atomization is performed again; then, the atomized water is jetted to a coal field fire control zone through the diffusion jet chamber.The device does not need an additional compressed air system and is compact and simple in structure, safe, reliable, easy to operate, high in portability and high in atomization degree.

An extracting and converting method for heat energy in a coal field fire zone belongs to heat energy extracting and converting methods. A flame retardant filling material is utilized to cover air inlet and air outlet channels in a high temperature zone, such as earth surface cracks and collapse pits, injecting and pumping drill holes for a heat extracting medium are constructed from the earth surface to an underground coal fire high-temperature zone, and the injecting drill holes are distributed on the circumference with the pumping drill hole as a center. A gaseous heat medium is pressed into the injecting drill holes by a gas booster pump, then, a vacuum pump pumps out heat medium mixed gas finishing heat exchange and guides the heat medium mixed gas into a filter, the filtered gas enters an evaporator so as to finish heat exchange, and exchanged heat energy is converted to electricity by an organic Rankine cycle system. Then, other gasses are separated out of the heat medium mixed gas by a gas component separating station, and the rest heat medium is input into a low-temperature gas storage tank after being cooled by a cooler. Finally, the heat medium is pressed into the injecting drill holes again by the gas booster pump, and cycle is finished. The method has the advantages that not only are the extracting and conversion of waste heat energy in the coal field fire zone realized, and the purpose of fire zone treatment is also achieved, and has wide practicability.

The invention provides a flow measurement method and a flow measurement device. The method comprises the following steps: measuring a plurality of instantaneous distances between a measurement module and the upper surface of a material on a scraper conveyor by the measurement module; acquiring a plurality of instantaneous stack heights of the material according to the instantaneous distances and the distance between the measurement module and the surface of the scraper conveyor; on the section width of the scraper conveyor, carrying out numerical integration on the instantaneous stack heights of the material so as to calculate an instantaneous stack sectional area of the material; and carrying out numerical integration on the product of the instantaneous stack sectional area of the material and the transmission speed of the scraper conveyor in time so as to calculate the volume flow of the material within the time of integration. The flow measurement method and the flow measurement device of the invention provide a new measurement method for assessing the output of raw coal on the top coal caving mining face in a coal mine, realize the accurate measurement of the output of the raw coal; can improve the enthusiasm of the on-job workers for producing coals, and improve the recovery rate of the coal field and the economic benefit of the coal mine.

The present invention discloses a method for evaluating the gas environment of the open coal mine, and belongs to the technical field of coal mining engineering. The method comprises: establishing an extension matter-element model of the green degree for the to-be-evaluated gas environment of the open coal mine; carrying out normalization on a definition domain of each evaluation index; calculating the comprehensive weight of each evaluation index by using the analytic hierarchy process and the entropy weight method; and according to the comprehensive weight and correlation degree of each evaluation index, determining the green degree evaluation grade and the fluctuation trend of the gas environment, and formulating a follow-up mining and treatment scheme for the to-be-evaluated gas environment of the open coal mine. According to the method disclosed by the present invention, the extension matter-element model is free from the restrictions of the kinds and the amount of the index, so that coexisting qualitative and quantitative problems are solved; the analytic hierarchy process and the entropy weight method are combined by using the game theory to carry out weight assignment, so that not only differences of the mines are taken into account to carry out reasonable regulation, but also objectivity and rationality of the weight are ensured; and the method can evaluate the design level of the open mines, and guides the mine design units and mine enterprises to implement green mining from the beginning of development of the mine field.

Disclosed is a detection method for porosity distribution of an upper formation of a fire district of a coal field. A plurality of measuring lines are arranged on the ground surface of the upper portion of the fire district of the coal field, a plurality of measuring points are disposed on each measuring line at intervals, holes are constructed and drilled on the measuring points on each measuring line one by one, then a transmitting antenna and a receiving antenna are respectively disposed in each two adjacent drilled holes on the same measuring line one by one, drilled hole radar multi-offset-distance cross-hole transmission detection is sequentially carried out for all the drilled holes on each measuring line, and the time span of electromagnetic waves propagating from the transmittingantennas to the receiving antennas under conditions that offset distances are different are acquired; and data of the acquired propagation time span of the electromagnetic waves are processed by the aid of a computer, mosaic and combination of porosity data on a two-dimensional section between each two adjacent drilled holes on each measuring line is realized, and a contour map of porosity distribution of the formation on the section of each measuring line is drawn. Accordingly, porosity distribution of the upper formation of the fire district of the coal field is obtained, and the condition of the porosity distribution of the loose and broken formation in an upper space of the fire district of the coal field is quickly and effectively detected in an in-situ state.

The invention discloses a subsequent disposing method of waste water through HPF method, which comprises the following steps: adding activated charcoal in the waste water to decolor; filtering to obtain supernatant and waste activated charcoal; returning waste activated charcoal to coal field into coke oven; evaporating supernatant under decompressing condition; condensing; cooling condensate to indoor temperature to obtain the solid of multi-amino composite salt; returning steam in the evaporating course into desulfurizing decyanating device to recycle after condensing.

The invention belongs to the technical field of remote sensing detection, and particularly relates to an airborne thermal infrared hyperspectral remote-sensing quantitative detection method for the coal field fire zone. According to the airborne thermal infrared hyperspectral remote-sensing quantitative detection method for the coal field fire zone provided in the invention, the problem that the combustion position and the combustion range of the coal fire cannot be quickly and accurately positioned in the complex and dangerous environment of the coal field fire zone in the prior art can be solved. The method comprises the steps of 1, acquiring data; step 2, performing geometric correction and image uniform-color embedding; 3, selecting a coal fire detection waveband; 4, obtaining an earthsurface temperature inversion model; 5, extracting the thermal anomaly information; 6, accurately extracting the range of the coal field fire zone based on emissivity characteristics. In this way, the quantitative detection of the coal field fire zone can be realized, and the range of the coal field fire zone can be detected accurately. The method is concise and simple in steps, and can be completely applied to the detection of the coal field fire zone based on the thermal infrared hyperspectral remote-sensing technology. Therefore, the method provides real-time supporting data for the fire extinguishing engineering of the coal field fire zone.

The invention discloses a coal field fire area determining method and device. The coal field fire area determining method includes the steps of obtaining thermal infrared image data of a target area, obtaining land surface temperature information of the target area according to the thermal infrared image data of the target area, determining the position of the burning center of coal fire of the target area according to the land surface temperature information of the target area, and determining the burning area of a current coal field fire area in the target area according to the position of the burning center of the coal fire of the target area. By means of the coal field fire area determining method and device, the effect of improving monitoring accuracy of the coal field fire area is achieved.

The invention relates to a device for the combined mining of methane, volatile matters and carbon in a coal field or oil gas in an oil field, which mainly comprises a steam injection well borehole or an extension-type steam injection extraction well borehole and a production well borehole or a production extraction well borehole. The upper end part of the well borehole is provided with a control device, an extraction device and a steam converter. The lower end part and the medium part as well as the lower part of the well are provided with space for a cutting section layer, or the cutting section layer space arranged on the lower end part of the well is internally provided with a steam heater or a catalytic heater which are used for conducting high-temperature high-pressure steam heating or catalytic heating to the coal layer or the oil layer, thus ensuring that the methane and the volatile matters in the coal field or the oil gas in the oil field are swiftly extracted to the ground by the extracting device. The device has the advantages of peculiar structure, advanced technology, simple and convenient mining and high extraction efficiency, and the device and the mining method have low investment and operation fee and low cost, thus being widely applied to the mining of the coal field and the oil field and the metallic minerals or the non-metallic minerals thereof.

A preparation method of pulverized fuel ash containing inhibition slurry for controlling fire in a coal field comprises the step of adding pulverized fuel ash, aluminium phosphate, magnesium chloride, sodium carboxymethylcellulose, sodium silicate and sodium bentonite material in water to prepare high-inhibition and high-temperature-resistance pulverized fuel ash thickening slurry. The prepared thickening slurry is conveyed to a burning coal seam or a coal fracture through a grouting pipeline by a high-pressure screw pump. After a period of time, the inhibition slurry can be thickened and solidified into a solid form. The inhibition slurry can resist high temperature of above 1,000 DEG C, can form a hard blocky structure after evaporation of water, and can closely cover the coal and block the fracture. The pulverized fuel ash containing inhibition slurry is low in cost, safe and environment-friendly, and remarkable in control effect on coal spontaneous combustion fire in the coal field, and has a good application prospect.

The invention discloses a novel heat pipe coal field fire area heat energy extraction power generation system which comprises a coal field fire area (1), and is characterized by comprising a drill hole (2), a gravity thermal conduction heat pipe (3), a temperature difference power generation chip set (4) and a heat pipe cooler (5), wherein the gravity thermal conduction heat pipe (3) is composed of a heat absorption section (3-1), a thermal insulating section (3-2) and a condensation section (3-3); the plurality of temperature difference power generation chips (4) forms a temperature difference power generation module; and the heat pipe cooling (5) is composed of a thermal conduction copper block (5-1) and a heat dissipation pipe (5-2). The system provided by the invention is simple and practical in structure, convenient to move and maintain, small in size and low in manufacturing cost, can be adaptable to the condition of coal field fire area, and is rapid in heat energy extraction speed and large in generating capacity; the system reduces heat energy waste, relieves damage of coal fire to environment, meanwhile well solves the difficulty of construction and life of workers in the fire area and residential electricity consumption of remote areas, and has extremely large application value and development prospect.

A fire extinguishing and cooling system for coal cavities and loose areas in a fire district of a coal field comprises a water inlet pipe, a liquid storage tank, a proportioning mixer, a foam generator, a water mist generator, a flow divider, a fire extinguishing agent filling device for ground drilling and an air compressor. After stopping agent or foaming agent in the liquid storage tank and water are quantitatively mixed by the proportioning mixer, the mixture and air provided by the air compressor are mixed in the water mist generator or the foam generator to form flame-retardant water mist or foam, and the flame-retardant mist or the foam is divided to the fire extinguishing agent filling device for ground drilling via the flow divider, the flame-retardant water mist is filled in the coal cavities in the fire district of the coal field, and the foam is filled in the coal loose areas in the fire district of the coal field, so that fire extinguishing and cooling effects are realized. By the aid of the system, the water can be converted into the flame-retardant water mist or the foam, contact areas of the water and the coal cavities and the coal loose areas in the fire district of the coal field are increased, management speed is increased, any external power sources are omitted, and the fire extinguishing and cooling system is simple in operation and convenient and speedy in detachment and movement, and has wide practicality in terms of management of fire districts of coal fields.

The invention relates to a feeding device for a rotary chute of a stock bin and belongs to the technical field of material storage and transportation. The feeding device for the rotary chute of the stock bin comprises a central stand column, a chute base plate, a chute side plate and abrasion-resistant lining plates. The central stand column (1) is vertically arranged between a bottom plate and a top plate of the stock bin. The chute base plate (2) is installed on the central stand column (1). The chute side plate (3) is installed on the chute base plate (2). The abrasion-resistant lining plates (4) are installed on the two sides of the chute side plate (3) and on the central stand column (1). The feeding device for the rotary chute of the stock bin has the advantages that bulk materials can be stably conveyed into the stock bin, and the phenomenon that the materials fall and are damaged due to the large fall in the process of being conveyed into the stock bin is avoided; and in addition, the discharging process is stable, material distribution is uniform, and the noise is low. The rotary chute further has the characteristics of being simple in structure, convenient to install and maintain and high in adaptability and can be widely applied to various fields such as the metallurgy field, the coal field, the chemical field and the building field.

The present invention provides a method for quickly investigating and evaluating the radioactive radiation environment of a coalfield with multiple parameters on site, which uses a multi-channel gamma energy spectrometer on the ground or in a well to measure natural uranium, uranium, The nuclide content of thorium and potassium and the total radioactivity of gamma can be used to calculate the activity concentration of uranium, thorium and potassium in the coal field by using the conversion coefficient of the radionuclide content and the activity concentration unit; according to the activity concentration of uranium, thorium and potassium in the coal field On-site calculation of gamma radiation dose rate; on-site estimation of the effective dose equivalent of coal field environment gamma radiation to residents based on gamma radiation dose rate; finally, this technology can replace laboratory analysis and on-site gamma radiation dose rate measurement, and provide uranium, thorium, Nuclide content of potassium, activity concentration of uranium, thorium, and potassium, environmental gamma radiation dose rate, effective dose equivalent of gamma radiation to residents, in order to achieve rapid, economical and multi-parameter completion of coal field radioactive radiation environmental investigation and evaluation.

The invention provides a radar satellite remote sending coal-exploration method which comprises the following steps: interpreting a radar satellite image to obtain the position information of a carbonaceous rock;, and actually measuring the coal-containing information of the carbonaceous rock on the basis of interpretation. Compared with the prior art, the radar satellite remote sending coal-exploration method has the beneficial effects that a microwave (radar) waveband can penetrate through the cloud, fog, rain and forest in the tropical rain forest, the radar satellite data image can directly reflect the surface geological condition in the tropical rain forest to initially interpret the radar satellite data so as to determine a regional geological structure and the distribution range of the coal-containing rock system; and a remote sensing coal-exploration work region is determined according to the distribution range of the coal-containing system, the blindness of selecting the geological coal-exploration region is prevented, the coal-exploration risk is avoided, and the success rate of exploring new coal fields is greatly improved.

The invention discloses a low-gas-permeability coal seam pressure-releasing and gas-extraction method in the technical field of coal mining. The low-gas-permeability coal seam pressure-releasing and gas-extraction method comprises the following specific steps that S1, a plurality of drill sites are arranged on a stable top plate of a coal field; S2, six double-position drill holes are formed in each drill site; S3, in the drilling process of the double-position drill holes, upper high-position drill hole end holes of each set of high-position drill holes are away from the top plate by 30-40 m,and lower high-position drill hole end holes of each set of high-position drill holes are away from the top plate by 20-30 m; S4, coal seam and gas are subjected to pressure-releasing and extractionfrom the lower portions of extraction pipes to the interiors of hole sealing pipes inside the excavated drill holes; and S5, the contact positions of the extraction pipes and the drill holes are sealed through polyurethane. The double-position drill hole gas extraction technology is adopted, the extraction efficiency of the method is high, meanwhile the effective influence range of the drill holesis extended, the gas permeability of coal bodies is improved, the good condition is created for coal beam interior pressure releasing and gas releasing and flowing, and the low-gas-permeability coalseam pressure-releasing and gas-extraction method is easy to operate and good in extraction effect, and has wide practicability.

The invention discloses a cubic visual method for detecting the storage of the coal field: first, equip the paired camera above the coal pile and measure the distance between the focal center and the photic platform; the camera moves along the photic axis and screens the coal piles referring to the center connecting line of the camera and the photic axis to get the pictures of the coal piles; get the theoretical pixel according to the pixel commutation of the coal pile pictures; calculate to obtain the coal pile pictures with the malformation removed and implement edge detecting; abstract the edge information; the area 9 of the edge point of the camera is the matching stencil; calculate the relative coefficient of the suited stencil and the sub-pictures covered by the stencil; select the conjugate point; fit the space curve face of the coal pile and calculate the size and the weight of the coal pile. The invention has high precision and low cost.

The invention discloses a method for building an underground oil depot by utilizing an abandoned coal mine well lane. The method for building the underground oil depot by utilizing the abandoned coalmine well lane comprises the steps of collecting geological data in the period of coal geology exploration, laneway exploiting and coal mining, and determining distribution characteristics of rock stratums, faults and fractures in a shaft and a laneway; determining oil permeability characteristics of the shaft and the laneway penetrating through the rock stratums with different lithology, and judging whether the rock stratums has oil storage conditions or not; carrying out leaking stoppage on the faults, the fractures and the high-permeability coal rock stratums, and preventing stored oil leakage; building a sealed space in a rubber belt main laneway, and isolating the rubber belt main laneway into oil depot chambers with different lengths ranging from 200 to 300m; through reconstructing the bottom part and a wellhead of a main well, enabling the main well to become a complete oil depot well; and reconstructing a power supply system, a ventilating system and a drainage system in an abandoned mine well, and meeting the demands of firefighting, ventilating and water supplying and draining functions of the oil depot. According to the method for building the underground oil depot by utilizing the abandoned coal mine well lane provided by the invention, the underground space resources of the abandoned mine well are fully utilized, and the built underground oil depot has the characteristics of concealment, safety and strategic performance.