85 results about "Coal field" patented technology

The invention relates to the technical field of coal mine exploration, in particular to a coal field geological anomalous body accurate positioning and intelligent prediction method based on machine learning, which comprises the steps of S1, integrating multi-source geological data; s2, data processing and feature enhancement; s3, machine learning modeling; s4, target spot optimization and dynamic verification; and S5, geological modeling and risk grading. According to the coal field geological anomalous body accurate positioning and intelligent prediction method based on machine learning, a depth domain joint data set is constructed, multi-dimensional features such as seismic amplitude, lithology coding, fracture index and fault distance field are integrated, and multi-source data fusion and physical constraint machine learning are realized through a feature enhancement technology; locking a high-uncertainty region based on the prediction variance, and dynamically updating a target spot through a Gaussian process proxy model to realize targeted drilling and dynamic closed-loop optimization; a multi-attribute risk fusion model is constructed, a four-level risk map is output through the risk factors, grouting resources are guided to be preferentially put into a high-risk area, and risk grading early warning processing is achieved.

The invention relates to a coal field fire high-temperature area identification and judgment method. The coal field fire high-temperature area identification and judgment method comprises the following steps: S10, delimiting a target area of a coal field, and respectively acquiring various data in the target area; s20, establishing a time rule model of temperature change through thermal-time sequence coupling; s30, establishing an incidence relation between temperature and radiation characteristics through thermal-spectral coupling; s40, establishing a chemical reaction association relationship between temperature and gas release through heat-gas coupling; and S50, constructing a three-dimensional feature space through the integration of S20, S30 and S40, classifying the three-dimensional feature space through machine learning, and outputting the probability corresponding to the high-temperature type. The coal field fire high-temperature area identification and judgment method has the advantages that high-precision and strong-anti-interference high-temperature area identification is achieved, and reliable technical support is provided for coal field fire monitoring.

The invention provides a fine detection method and device suitable for a coal field fire area, and the method comprises the following steps: retrieving related data, carrying out the ground surface geological survey, and obtaining the geological features of a mining area; exploring the earth surface part of the target area, wherein the exploration method comprises an unmanned aerial vehicle infrared temperature measurement method, an unmanned aerial vehicle aerial surveying and mapping method, a field investigation method and a temperature measurement verification method; the natural potential and magnetic distribution condition of a fire area is detected through combination of potential method detection and magnetic method detection, and the coal seam combustion depth and range are deduced; through cooperation of drilling verification and in-hole temperature measurement, data of the vertical combustion state, temperature distribution and geologic structure of the coal field fire area are obtained; and fusing and identifying the acquired information. According to the method and device provided by the invention, the manual investigation risk is reduced, and the working efficiency is improved; through multi-means data fusion and inversion, the fire area positioning precision is improved to a meter level, and the precision of an output result is improved. The air-ground-hole integrated fine detection of the coal field fire area is realized.

The invention provides a coal gangue crusher, and belongs to the technical field of coal field geological exploration. The coal gangue crusher comprises a jaw type crushing body and a feeding hopper arranged at the top end of the jaw type crushing body, a feeding port is formed in one side of the feeding hopper, a discharging port is formed in the bottom end of the feeding hopper, a horizontal anti-blocking frame is arranged in the feeding hopper, and a large feeding channel and multiple rows of small feeding channels are arranged on the surface of the horizontal anti-blocking frame. The large feeding channels penetrate through the horizontal anti-blocking frame in the axial direction, every two adjacent rows of small feeding channels are distributed in the axial direction of the horizontal anti-blocking frame in a staggered mode, the small feeding channels are used for allowing small coal gangue to pass through, the two ends of the horizontal anti-blocking frame are rotationally matched with the two side walls of the feeding hopper, and a power device for driving the horizontal anti-blocking frame to rotate is arranged at the top end of the feeding hopper. And when the horizontal anti-blocking frame rotates, the large feeding channel and the small feeding channel pass through the feeding port from bottom to top. The coal gangue pre-crushing device has the advantages of blockage prevention, coal gangue pre-crushing, long service life and high stability.

The present application relates to geological exploration technical field, disclose a kind of thick loess plateau area coalfield 3D seismic exploration method, comprising the following steps: S101, artificial seismic source shooting record and superficial Rayleigh wave detector data are collected;S102, grid division is carried out to target area, and set to be inverted parameter;S103, vertical ray path time estimation, multilayer medium dispersion forward and poststack energy estimation are carried out;S104, according to first wave arrival time observation value, Rayleigh wave observation dispersion curve, theoretical ray path time, phase velocity and poststack energy generates multi-target error function;S105, target area is divided into three subdomains, differential evolution iteration is carried out, until local convergence;S106, establish a plurality of parallel annealing chain, set chain temperature and gradually decrease by chain, optimize to be inverted parameter, output optimal to be inverted parameter;S107, the static correction time difference and absorption compensation coefficient of each acquisition point are calculated.The present application improves coal seam structure imaging precision and exploration data reliability under complex surface conditions.

This invention discloses a method for optimizing and numerically simulating hydrological parameters of coalfield aquifers, relating to the field of coalfield hydrogeological exploration and groundwater numerical simulation technology. The method includes the following steps: Step S1: Obtain drilling monitoring data and historical hydrogeological data from multiple boreholes within the target coalfield area, construct an initial aquifer structure model, and generate an initial hydrological parameter field based on the initial aquifer structure model; Step S2: Based on the initial hydrological parameter field, construct an initial groundwater numerical simulation model, and calibrate and verify the initial groundwater numerical simulation model using preset observation well water level data to obtain a benchmark numerical simulation model; Through distributed fiber optic temperature and strain dual-field monitoring, and coupled Bayesian inversion of heat, solid, and fluid, this method overcomes the limitations of traditional pumping / pressure water tests, which suffer from single-point discretization, time lag, and the inability to obtain only static averages.

The invention discloses a geologic model dynamic updating method and system based on earthquake intelligent interpretation driving, and belongs to the field of three-dimensional geologic modeling, and the method comprises the steps: collecting open coal field earthquake data, dividing training, verification and test sets, and constructing a general fault feature extractor based on AI model architecture offline pre-training; importing actual data of a mining area, picking up a coal seam, intercepting a time window data body to form a training set fitting local geology, migrating and finely tuning an upper network to output a fault probability body, and processing to construct an initial three-dimensional geologic model; then, an increment label is generated in combination with tunneling / stoping disclosure information, and AI model architecture parameters are finely adjusted by using the increment label when a set threshold value is reached; and finally, recalculating by using the updated model to finish updating of the model synchronous with mining. By adopting the method and the system, full-chain closing of excavation disclosure-earthquake intelligent interpretation-three-dimensional geologic model dynamic updating is realized, and the method and the system have relatively high practicability and innovativeness in practice.

The invention relates to the technical field of Jurassic coal fields, and discloses a green mining grouting device and mining method for Jurassic coal fields, and the method comprises the following steps: S1, exploring the development height of a water flowing fractured zone; s2, probing the influence range of the water flowing fractured zone; s3, determining a target aquifer for main prevention and control; s4, determining a grouting treatment target; s5, grouting treatment is carried out on the treatment target determined in the step S4 by adopting a method of drilling and grouting through a drill rod and a material conveying rod; and S6, the green mining effect is inspected. A monitored area is drilled through a drill rod, a material conveying rod is inserted into the drill rod, the material conveying rod reaches a sealing head, and cement is injected along a channel when the material conveying rod is inserted into an inner hole of the sealing head to be opened, so that grouting plugging can be conducted on high-angle cracks, the workload of green mining treatment is reduced, and the working efficiency is improved. The water prevention and control cost is reduced for mine water prevention and control work, and benefits are increased.

The application discloses a coalfield aquifer hydrological parameter optimization and numerical simulation method, relates to the technical field of coalfield hydrogeological exploration and groundwater numerical simulation, and comprises the following steps: step S1: obtaining drilling monitoring data and historical hydrogeological data of a plurality of drill holes in a target coalfield region, constructing an initial aquifer structure model, and generating an initial hydrological parameter field based on the initial aquifer structure model; step S2: constructing an initial groundwater numerical simulation model based on the initial hydrological parameter field, calibrating and verifying the initial groundwater numerical simulation model by using preset observation well water level data, and obtaining a benchmark numerical simulation model; through distributed optical fiber temperature and strain double-field monitoring, thermal, solid and flow coupling Bayesian inversion, the limitations of traditional pumping / pressure water tests, such as single-point dispersion, time lag and only static mean value acquisition, are broken through.

The present application relates to the technical field of Jurassic coalfield, and discloses a kind of green exploitation grouting device and exploitation method of Jurassic coalfield, comprising the following steps: S1: the development height of water-conducting fracture zone is inquired;S2: the influence range of water-conducting fracture zone is inquired;S3: the purpose aquifer of main prevention and cure is determined;S4: the grouting target is determined;S5: the grouting target determined in S4 is grouted by drilling and feeding rod drilling+grouting method;S6: the effect of green exploitation is tested.Drilling is carried out on the monitoring area by drill rod, a feeding rod is inserted into the inside of the drill rod, the feeding rod reaches the sealing head, when the inside hole of the feeding rod inserted into the sealing head is opened, and then cement is injected along the channel, so that the high-angle fracture can be grouted and plugged, the workload of green exploitation treatment is reduced, the cost of mine water prevention and control is reduced, and the benefit is increased.

The invention discloses a coal field geology geophysical exploration data acquisition device, and relates to the technical field of coal field geology exploration, the coal field geology geophysical exploration data acquisition device comprises a supporting ring, the top of the supporting ring is fixedly connected with four L-shaped rods, the ends, away from the supporting ring, of the four L-shaped rods are jointly and fixedly connected with a supporting disc, and the supporting disc is located at the top of the supporting ring; through mutual cooperation of a second motor, a drill bit, a hammering disc, an air cylinder and other structures, the hammering disc can be firstly placed on the front side of the top of a supporting ring, a T-shaped plate on the top of the hammering disc is aligned with T-shaped grooves in limiting plates, then the hammering disc is pushed backwards, the hammering disc drives the T-shaped plate to move, the T-shaped plate moves into the T-shaped grooves in the two limiting plates, and therefore the purpose that the T-shaped plate is driven to move is achieved. And a threaded hole in the hammering disc is aligned with a threaded hole in the transverse plate, a threaded rod penetrates through the threaded hole in the transverse plate in a threaded mode and enters the threaded hole in the hammering disc, and further installation of the hammering disc is completed.

The invention relates to the technical field of coal field fire extinguishing, and discloses a coal field fire extinguishing system based on unmanned aerial vehicle collaborative operation, first extrusion plates are installed at the two end faces of the lower surface of a pressing plate, springs are symmetrically arranged on one side face of a connecting plate, and clamping plates are arranged at one ends of the springs; a second extrusion plate is mounted on one side surface of the clamping plate; a control box is installed on the lower surface of the water tank, a second water pipe is arranged on the lower surface of the control box in a penetrating mode, the lower end of the second water pipe communicates with a connecting pipe, the lower end of the connecting pipe communicates with a water spraying pipe, nozzles are symmetrically arranged on the lower surface of the water spraying pipe, and a water suction pump is arranged in the water tank. A first gear rotates through work of a motor, the angle of a water spraying pipe can be finely adjusted through meshing of the first gear, a second gear and a third gear, and meanwhile the purpose that a second rotating shaft rotates to stir the interior of a water tank is achieved through meshing of a first bevel gear and a second bevel gear.

This invention discloses a method, apparatus, medium, and equipment for three-dimensional seismic fault identification in coalfields, relating to the field of fault identification. The method includes: acquiring raw three-dimensional seismic data of the area to be measured; denoising the raw three-dimensional seismic data using a deep learning model to determine the denoised three-dimensional seismic data; constructing a ResU-Net model for coalfield seismic fault identification; training the ResU-Net model; using the trained ResU-Net model to perform fault identification on the denoised three-dimensional seismic data, generating a fault probability volume; retraining the trained ResU-Net model using a training set to iteratively optimize the fault probability volume, determining the optimized fault probability volume; and performing fault identification based on the optimized fault probability volume and geological interpretation requirements to obtain the identification results.

The invention relates to the technical field of coal mine safety and fire prevention and extinguishment, and discloses a coal field fire area multiphase foam flame-retardant fire extinguishing method and system.The coal field fire area multiphase foam flame-retardant fire extinguishing method comprises the following steps that S1, multiphase foam is prepared, the multiphase foam comprises a gas phase, a liquid phase and a solid phase, the gas phase is mixed gas of nitrogen and carbon dioxide, and the liquid phase is mixed gas of nitrogen and carbon dioxide; the liquid phase takes a bio-based surfactant as a base material and is compounded with a temperature response type epoxy resin emulsion, and the solid phase is composite flame-retardant particles; s2, the coal field fire area is investigated, an unmanned aerial vehicle carrying an infrared thermal imaging sensor and a gas sensor is used for scanning temperature distribution and crack positions of the fire area, and a three-dimensional thermodynamic diagram of the fire area is generated; and S3, obtaining the three-dimensional thermodynamic diagram of the fire area. By means of an intelligent investigation and conveying system, precise adaptation of a complex coal field fire area and efficient utilization of fire extinguishing resources are achieved, and the defects that in the prior art, under the heterogeneous geological condition, the number of coverage blind areas is large, and resource waste is large are overcome.

The utility model belongs to the technical field of coal field seismic exploration, and particularly relates to a coal field seismic exploration soil hole backfill quality detection device which comprises a probe rod and a handle assembly detachably installed at the top end of the probe rod, a movable column is installed on the inner side of the bottom of the probe rod in a sliding mode, and a pressure sensor is fixedly installed at the top end of the movable column. The other end of the pressure sensor is fixedly installed with a probe rod, a probe is installed at the bottom end of the movable column, a central processing unit with the input end electrically connected with the pressure sensor is arranged in the probe rod, and the output end of the central processing unit is wirelessly connected with a handheld terminal. According to the utility model, the backfill quality can be rapidly detected, the average detection time of the backfill quality of each soil hole is one minute, and the device is small in size, simple in structure, easy to operate, low in manufacturing cost, light in weight, convenient to carry, suitable for field large-scale exploration operation, high in detection efficiency and higher in practicability.

The utility model relates to a coal field geological exploration sampling device which comprises a coal field geological sampling barrel, a support is fixedly connected to the outer surface of the coal field geological sampling barrel, a supporting rod is rotationally connected to the support in a damping mode, a pressing plate is arranged at one end of the supporting rod, and lock catch structures are arranged on the supporting rod and the coal field geological sampling barrel. A steel chisel guide assembly I and a steel chisel guide assembly II which are used for limiting a steel chisel are arranged in the coal field geology sampling barrel, and linear driving structures are arranged on the steel chisel guide assembly II and the coal field geology sampling barrel; the lock catch structure comprises an elastic rope, the elastic rope is fixedly connected to the coal field geology sampling barrel, one end of the elastic rope is fixedly connected with a shackle, and the supporting rod is fixedly connected with a hanging lug used for hooking of the shackle; the number of the first steel chisel guide assemblies is one pair, and each first steel chisel guide assembly comprises a V-shaped support. The technical problem that in the prior art, when sampling steel chisels of different diameter types are used for auxiliary sampling, guiding and limiting applicability is low is solved.

This invention belongs to the technical field of thermoelectric conversion equipment, specifically a capsule-type thermal energy extraction method for coalfield fire zones. Addressing the problem that existing coalfield fire zone thermal energy extraction processes mostly require manual deployment, making it inconvenient to automatically deploy high-thermal-conductivity capsules, thus hindering penetration into the fire zone and insufficient capture of thermal energy, the present invention proposes the following solution, comprising the following steps: S1: Preparing an extraction device, which includes a vehicle body. A shell is fixedly installed on the top of the vehicle body, and ventilation openings are provided on both sides of the shell. Dustproof plates are fixedly installed in both ventilation openings. A first and second drilled hole are provided on the bottom inner wall of the shell, and a bracket is fixedly installed on the top of the shell. This invention facilitates the automatic deployment of high-thermal-conductivity capsules during use, enabling deep penetration into the fire zone for sufficient capture of thermal energy. It also has a cleaning function, facilitates continuous extraction operations, and features a simple structure and convenient use.

The invention relates to the technical field of mine safety engineering, in particular to mechanical coal field fire extinguishing equipment which comprises a rack sleeve, a hinge end is arranged on the outer cambered surface of the rack sleeve, an abutting end is arranged in the middle of the inner cambered surface of the rack sleeve, a step end is arranged at the position, close to the abutting end, of the rack sleeve, and the inner cambered surface of the step end is sleeved with a sealing cover. The inner arc face of the sealing cover is sleeved with a fire extinguishing fluid conveying cavity, and a pressing sleeve is sleeved between the sealing cover and the fire extinguishing fluid conveying cavity. A conical outer partition cover and an inner arc cover face of the first-stage fire extinguishing mechanism surround a fire extinguishing area, fire extinguishing force can be concentrated, medium loss is reduced, directional conveying of a fire extinguishing medium is achieved through cooperation of a permeation suite and a ventilation sleeve, it is ensured that the fire extinguishing medium accurately acts on the core portion of the fire area, and fire extinguishing efficiency is improved. And a frame structure and a heat insulation cover net of the second-stage fire extinguishing mechanism can complementarily cover the edge and the gap area of the fire area and cooperate with the first-stage fire extinguishing mechanism, the fire extinguishing range is widened, the fire extinguishing efficiency is improved, and fire re-combustion is effectively avoided.

The utility model discloses a rock core collecting device for coal field geological drilling, which comprises a box body unit, the box body unit is used for collecting rock cores, a jacking unit comprises a jacking assembly and a driving assembly, and the jacking assembly is used for lifting one end of a long-strip rock core; the driving assembly is connected with the jacking assembly and used for driving the jacking assembly to ascend and reset. According to the rock core collecting device for coal field geological drilling, by arranging the jacking unit, when a long-strip rock core needs to be taken out, the driving assembly can drive the jacking assembly to ascend, and a supporting block in the jacking assembly lifts one end of the long-strip rock core, so that a certain gap is formed between the rock core and the placing plate, and a worker can easily take out the rock core conveniently; the problems of difficulty in operation and damage to the rock core caused by difficulty in taking out the rock core are solved, and the integrity of the rock core sample is ensured.

The invention discloses a coal field fire area space-time grading adaptation loss reduction extinguishing control and ecological restoration cooperation method. The method comprises the steps that distribution characteristics of the combustion area, temperature and degree of a coal well field fire area and space distribution characteristics and geometric parameters of a roadway-seam-gap multi-scale air leakage oxygen supply channel are obtained; the fire area is preliminarily divided into a shallow area, a middle area and a deep area in the vertical direction; with the ignition temperature as the upper limit temperature, the combustion degree of the fire area is divided into three grades of low temperature, medium temperature and high temperature; determining an adaptive technology and a proper time sequence, and forming a coal well field fire hazard'time-space-grading-adaptive 'environment loss extinguishing control method; an ecological restoration water-resisting layer, a water-containing layer and a loess ecological layer are constructed on the basis of the coal well field fire disaster'time-space-classification-adaptation 'environment loss reduction and control method. According to the method, a'time-space-classification-adaptation 'loss reduction extinguishing control method is provided, the damage degree of coal well field fire area treatment to the environment is reduced, and the cost-benefit ratio of fire area treatment to ecological restoration is reduced.

The invention belongs to the technical field of coal field geology, and discloses a coal mining machine fault passing path planning method based on a transparent geologic model. The method comprises the steps that 1, a three-dimensional geologic model of a fully mechanized coal mining face is constructed, and working face stratum data and key equipment data are subjected to digital characterization; 2, obtaining the fault position, fault fall and coal seam thickness of the current cutting cycle; comparing the fault fall with the coal seam thickness, and calculating the coal loss caused by adjusting the height of the roller of the coal mining machine at each position in the current cutting cycle according to the comparison result; 3, obtaining the optimal adjustment position of the current cutting cycle through comparison, and taking the position as the initial position of adjustment; and the height value of the roller of the coal mining machine corresponding to each position needing to be adjusted is obtained and sent to the coal mining machine. According to the method, fully-mechanized coal mining equipment can be planned according to the optimal cutting path, more coal cutting and less rock cutting are achieved, and the coal loss of the fully-mechanized coal mining face passing through the fault can be effectively reduced.

The invention relates to the technical field of gas phase medium collection, in particular to a multifunctional adjustable coal field underground gas sampling device which comprises a drilling machine and a sampling barrel, the drilling machine is detachably connected with the sampling barrel, and the drilling machine is used for drilling a hole in the ground of a target layer and downwards conveying the sampling barrel to the target layer after drilling is finished; a sampling channel is formed in the sampling barrel, the bottom of the sampling channel is communicated with a sampling cabin, packers are symmetrically arranged at the top and the bottom of the sampling cabin, and the packers are used for forming a sealing ring between the sampling barrel and a hole wall after the sampling cabin reaches a target layer; one end, far away from the sampling cabin, of the sampling channel is also communicated with a negative pressure collecting mechanism; the negative pressure collecting mechanism is used for generating negative pressure in the sampling channel and storing the collected gas. The accuracy of the collected gas sample can be improved.

The invention discloses an injection and detection separated coal fire crack recognition plugging method and plugging system, and relates to the field of coal field drilling and coal field fire area governance. The plugging method comprises the steps that a drilling network is formed for coal fire area construction, observation holes are selected for combined electro-magnetic scanning, and data vectors before and after tracing medium injection are obtained; reconstructing the three-dimensional conductivity and magnetic conductivity distribution of the underground crack, obtaining the three-dimensional space distribution of the crack, and determining the grouting amount of the tracing plugging material; according to the system, heat dissipation drilling, crack recognition, plugging and depth control are integrated, and the whole process of high-temperature hole forming, tracing injection, electromagnetic scanning, inversion imaging, targeted grouting and effect verification is completed. According to the method, conductivity and magnetic conductivity two-parameter joint inversion is realized, the problems that natural geological anomalies and crack channels cannot be distinguished through single electrical method / magnetic method detection, the number of inversion result false anomalies is large and the like are solved, true three-dimensional and high-resolution stereo imaging of crack space distribution and connectivity is realized, and a high-precision target spot is provided for targeted grouting.

The present invention relates to the technical field of oilfield well logging, and in particular to a lithology identification method, device, equipment and medium for coalfield well logging. The method comprises: obtaining probe acquisition data, storing the data in a file and establishing raw logging data; forming a resistivity curve and a natural gamma curve based on the raw logging data; stratifying non-coal rock layers according to changes in the resistivity curve and the natural gamma curve, and determining resistivity statistics and natural gamma statistics of each layer; normalizing the resistivity statistics and natural gamma statistics of each layer to obtain normalized resistivity results and normalized natural gamma results of each layer; calculating lithology index results of each layer based on the normalized resistivity results and natural gamma results of each layer; and determining lithology interpretations of each layer based on the lithology index results of each layer, thereby reducing misjudgment of lithology interpretations and improving the accuracy of lithology interpretations through stratified statistics and standardized lithology indicators.

The invention discloses a method for promoting plant growth by utilizing residual heat energy in a coal field fire treatment area, and belongs to the field of heat energy utilization. Comprising the following steps: obtaining a heat conductivity coefficient lambda < soil > of a solid medium in a covering layer material of the coal field fire control area, a permeability coefficient k of the covering layer material and a porosity phi of the covering layer material; obtaining the thickness D of the covering layer material; obtaining heat energy temperature field distribution of the coal field fire control area according to the heat conductivity coefficient lambda < soil >, the permeability coefficient k and the porosity phi; respectively determining thermal gain temperature thresholds of trees, shrubs and plants by adopting a vegetation thermal gain temperature threshold determination method; and analyzing soil temperature distribution characteristics according to heat energy temperature field distribution of the coal field fire control area and the thickness D of a covering layer material, and selecting the most adaptive vegetation for planting in combination with thermal gain temperature thresholds of trees, shrubs and grass trees or planting the most adaptive vegetation after improving an adding structure of the coal field fire control area. The residual heat energy of the coal field fire treatment area can be effectively utilized.

The invention discloses a water-containing coal field exploration detection device which comprises a box body, a material taking opening is formed in the position, close to the bottom, of the front side of the box body, a material discharging opening is formed in the position, close to the top, of the right side of the box body, a T-shaped pipe is arranged at the top of the box body, a reciprocating air cylinder is arranged at the left end of the T-shaped pipe, and a power output shaft of the reciprocating air cylinder penetrates through the T-shaped pipe. According to the invention, through the mutual cooperation of the component metering mechanism, the material shaking mechanism, the feeding mechanism and other components, when a worker puts 1mL of a stock solution on a swing plate through a beaker by using a pipettor, 100mL of dilution water and the stock solution can be automatically mixed, the operation is simple, the operation is convenient, the labor intensity is reduced, the labor intensity is reduced, and the work efficiency is improved. The stock solution and the dilution water are fully and uniformly mixed, so that the uniformity is ensured, and the detection result is prevented from losing significance due to result errors.

The utility model discloses a cement paste stirring device for coalfield borehole hole sealing, including upper cylinder and lower cylinder, the upper cylinder and lower cylinder are all conical, wherein the upper cylinder lower part diameter is greater than the upper part diameter, the upper part diameter of lower cylinder is greater than the lower part diameter, the maximum diameter of upper cylinder is equal with the maximum diameter of lower cylinder, and the height of upper cylinder is lower than the height of lower cylinder, and the upper cylinder and lower cylinder are connected through the connecting flange between. Adopt the same taper upper cylinder and lower cylinder and assemble into the stirring cylinder, and adopt the stirring mechanism that can dismantle, can place to the lower cylinder after can be inverted upper cylinder when transportation, place to the inverted upper cylinder after the stirring mechanism dismantles, can reduce the overall volume of stirring device, convenient transportation can be applicable to the hole sealing cement paste stirring after field drilling operation.

The invention discloses an intelligent temperature measuring method for coal field fire extinguishing advanced detection drilling, an intelligent temperature measuring device for coal field fire extinguishing advanced detection drilling, intelligent temperature measuring equipment and a computer readable storage medium. Two independent temperature sensors are integrated at the end of the probe to synchronously collect temperature information in a drill hole. In the measurement process, the system carries out real-time comparative analysis on data of the two sensors, judges the working states of the sensors according to the deviation degree of the two sensors, executes self-adaptive weighted fusion output when the deviation is in a normal range, and automatically identifies an abnormal sensor and switches to a single-sensor reliable mode when the deviation exceeds a threshold value. In addition, the system establishes a dynamic thermal response compensation model according to thermal inertia parameters of the sensor, corrects a transient measurement value in the moving process of the probe in real time, and outputs a compensated steady-state equivalent temperature. According to the invention, the problems of insufficient temperature measurement reliability and thermal response lag of a traditional single sensor are effectively solved.

The application discloses a water conservation coal mining process evaluation and screening method suitable for Jurassic coalfield, and belongs to the technical field of coal mining. The method solves the problems that the existing evaluation method cannot fully combine the geological characteristics of the Jurassic coalfield, the index weight determination is not scientific enough, and the optimization result lacks robustness test. The main points of the method are to construct a three-dimensional index system including water conservation effect, economic benefit and engineering feasibility, and to include indexes such as separation layer development time sequence matching degree which are aimed at the Jurassic coalfield; after collecting the original data of the selected process, the objective weight is calculated by using the entropy weight method, the coefficient of variation method and the CRITIC method, and then the geometric mean method is used to combine the most weight; the data is processed by dimensionless, the linear weighted comprehensive method is used to calculate the comprehensive evaluation value and sort the optimal process, and finally the robustness of the optimization result is verified through the sensitivity analysis. The method is mainly used for providing basis for scientifically selecting and evaluating the water conservation coal mining process of the Jurassic coalfield mine.