2618results about "Material fill-up" patented technology

The invention belongs to the technical field of mine safety monitoring and geotechnical engineering stability evaluation, and relates to a mine filling body performance detection and stability evaluation method and system.The method comprises the steps that S1, a first type of monitoring signals are collected in real time through a distributed optical fiber sensor array, and meanwhile vibration waveform signals serve as second type of monitoring signals; s2, inputting the first type of monitoring signals and the second type of monitoring signals into a multi-source data fusion model, and generating fusion state signals representing the three-dimensional damage degree and the real-time deformation state of the filling body; s3, inputting the fusion state signal into a parameter dynamic identification module to generate an updated numerical model parameter signal; and S4, based on the updated numerical model parameter signal, executing stability quantitative calculation to generate a risk level signal. According to the mine filling body performance detection and stability evaluation method and system, the problem of inaccurate psychological state recognition such as large individual difference, strong environmental interference and weak dynamic adaptability can be solved.

A mining, releasing and filling process flow collaboration method for a nearly-upright super-thick coal seam belongs to the technical field of coal mining and comprises the following steps: dividing the nearly-upright super-thick coal seam into a plurality of sections, respectively establishing a low-level mining and releasing system at the bottom of each section, and respectively establishing a high-level filling system at the horizontal position of the top interface of each section; comprising a coal mining period and a filling period, after the low-position mining and caving system is established, coal mining and caving are carried out through a coal mining machine and a support in the coal mining period, in the machine following and support moving process, a novel support synchronously lays a separation net on a goaf, and after a filling step pitch is pushed forwards, the novel support unfolds slurry blocking cloth; then filling slurry is injected into the goaf through a high-position filling process roadway, a filling chamber and a filling hole in sequence, the stability of nearly upright surrounding rock is maintained, and it is ensured that the mining depth is safely extended; the method effectively solves the problems of difficulty in prevention and control of surrounding rock instability, difficulty in control of cutting type subsidence and low recovery rate of coal resources in the existing horizontal section fully mechanized caving mining method of the steeply inclined nearly-upright extra-thick coal seam.

The invention relates to the technical field of computer simulation, and discloses a computer simulation-based overlying strata multilevel grouting design optimization method, which comprises the following steps of: constructing a three-dimensional geomechanical model of a goaf according to geological exploration data; calculating development characteristics of each layer in the overlying strata of the goaf, and constructing a grouting bearing layer position of the goaf according to the development characteristics; fracture development characteristics and horizon stress distribution are analyzed; according to fracture development characteristics and horizon stress distribution, analyzing grouting simulation parameters of the horizon of the grouting bearing layer; generating a multi-level layered grouting simulation scheme of the position of the grouting bearing layer; generating a digital track of the position of a grouting bearing layer according to the multi-level layered grouting simulation scheme, and generating a grouting control simulation instruction according to the digital track; and according to the grouting control simulation instruction, multi-level grouting simulation operation is carried out on the position of the grouting bearing layer, and a multi-level grouting simulation result is output. According to the method, the accuracy of the grouting level of overlying strata multi-level design optimization can be improved.

The invention discloses a goaf CO2 sealed storage warehouse construction and grouting filling fire preventing and extinguishing method, and belongs to the technical field of goaf filling. The goaf CO2 sealed storage depot comprises a CO2 storage depot unit, a solid waste filling column and inflation-grouting equipment, an inflation bag is arranged in the CO2 storage depot unit, the inflation bag is movably connected in the CO2 storage depot unit, the CO2 sealed storage depot is constructed in the goaf through the inflation bag, alkaline solid waste and mineralized slurry, and the storage depot is used for supporting a roof rock stratum and storing CO2. Large-scale recycling of the alkaline solid waste can be achieved through the sealed storage warehouse, the storage warehouse is used for supporting the goaf roof rock stratum and storing CO2, the roof rock stratum is prevented from collapsing and endangering mine production safety, CO2 emission is reduced, the greenhouse effect is improved, and cooperative treatment of goaf fire and CO2 storage is achieved.

The invention discloses a negative carbon coplanar filling system arrangement and mining method, which comprises the following steps of: stoping by adopting a rear gangue high-porosity filling coal mining technology, retaining a stoping roadway on one side of a filling section by utilizing a gob-side entry retaining technology, and reinforcing by adopting a roadway-side support body; the mining roadway serves as a CO2 filling roadway of the working face and a mining roadway on one side of an adjacent filling working face; when the working face advances by 300-500 m, the working face is separated from a rear goaf through a sealing wall, and a sealed storage space is formed; then, drill holes are formed in the goaf through the CO2 injection and filling roadway, and CO2 injection and filling pipelines are arranged in the mining roadway and the drill holes; and CO2 is injected into the goaf by the CO2 injection pump through the CO2 injection pipeline, and after injection is completed, CO2 injection in the next closed space is started until injection of the working face is completed. The system is simple in arrangement, CO2 filling and coal mining filling do not interfere with each other, operation is flexible, the sealing performance of the sealing space is good, the dual purposes of solid waste disposal and CO2 sealing are achieved, and green mining of coal resources is achieved.

The invention discloses a yellow phosphorus tailing-based mine filling material and application thereof. The yellow phosphorus tailing-based mine filling material comprises aggregate and a cementing material, the cementing material comprises the following components in parts by mass: 5-20 parts of red mud, 20-40 parts of yellow phosphorus slag, 10-30 parts of slag, 5-10 parts of fly ash, 5-10 parts of a compound exciting agent, 1-3 parts of an early strength agent and 2-5 parts of a water-retaining agent; wherein the compound exciting agent comprises the following components in parts by mass: 10-20 parts of sodium metasilicate, 30-40 parts of gypsum powder, 20-30 parts of sodium sulfate, 5-10 parts of carbide slag and 5-10 parts of silica fume; according to the invention, the raw materials are compounded and the specific exciting agent is subjected to depolymerization-polycondensation reaction to obtain a cementing material containing Aft (ettringite), C-S-H gel (hydrated calcium silicate gel) and C-A-S-H gel (hydrated calcium aluminosilicate gel), and finally, the mine filling material with high fluidity, low bleeding rate and high strength is obtained while yellow phosphorus tailing solid waste is treated.

The invention discloses a steeply-inclined nearly-upright extra-thick coal seam horizontal section fully-mechanized caving filling mining method, and relates to the technical field of coal mining. The method includes the following steps that the nearly-vertical super-thick coal seam is divided into different mining levels of 20-40 m, a low-position mining and releasing system is arranged at the horizontal position of the junction of a current section and a lower section, a high-position filling system is arranged in a top plate or bottom plate rock pillar at the horizontal position of the junction of the current section and an upper section, and the coal seam of the current section is mined through a fully-mechanized caving mining method; along with advancing of the coal face, a separation net and slurry blocking cloth are laid on the goaf through a net laying and slurry blocking support; a suspended cavity space detection characterization robot arranged in the high-position filling system is used for carrying out goaf space detection; the method comprises the following steps: dividing a nearly upright extra-thick coal seam into different sections for section mining, performing in-situ grouting filling on a subsequent mining space in the mining process, forming a stable filling interface in a goaf, fundamentally weakening stress concentration and reducing energy accumulation, and realizing collaborative proceeding of filling and coal mining.

The invention discloses a supercritical carbon dioxide mineralization and storage method based on a paste filling technology. The supercritical carbon dioxide mineralization and storage method comprises the following steps: S1, preparing a paste filling material; s2, preparing supercritical carbon dioxide; s3, mineralization and storage: in order to realize large-scale mineralization and storage of CO2 in the mine, the mineralization and storage step comprises a mineralization filling slurry preparation process and a carbon injection mineralization process; according to the supercritical carbon dioxide mineralization and storage method based on the paste filling technology, the paste filling technology and supercritical carbon dioxide mineralization and storage are combined, mine solid waste with a large number of calcium and magnesium resources and supercritical carbon dioxide are fully mineralized, mineralization filling slurry is prepared and filled into an underground goaf, and the mining goaf is filled with the mineralization filling slurry. The mechanical property and the pore structure of the filling body are improved, the concept of treating waste with waste in a mine is met, and green mining of the metal mine is achieved.

The invention discloses a filling disaster prevention and control green mining method for a nearly-upright extra-thick coal seam, and relates to the technical field of coal mining. The method includes the following steps that the nearly-vertical super-thick coal seam is divided into different sections according to the thickness of 20-40 m; all the sections are mined through a fully mechanized caving mining method, after the coal face is advanced by 8-10 m, namely a mining and filling step pitch, slurry blocking cloth is arranged on a top coal caving filling mining hydraulic support, and a separation net is laid in a goaf; grouting and filling are conducted on the goaf through the high-position process roadway; the nearly vertical coal seam is divided into a plurality of horizontal sections, the descending mining sequence is adopted, goaf timely filling is matched, rock stratum movement can be precisely and cooperatively controlled, steeply inclined rock stratum displacement and deformation caused by coal seam mining are effectively reduced, surrounding rock stress is remarkably weakened, earth surface deformation is controlled, and compared with a traditional mining mode, the mining efficiency is improved. And the risk of coal rock dynamic disasters is greatly reduced.

The invention relates to the technical field of coal mine safety mining, and discloses a coal rock gas disaster protective layer drilling hierarchical regulation and control method which comprises the following steps: S1, geological survey; s2, drilling and pressure relief; s3, hydraulic fracturing is carried out; s4, gas extraction is carried out; s5, top plate deep hole blasting; s6, advanced cave building energy absorption flexible supporting is carried out; s7, grouting reinforcement is conducted; and S8, continuous regulation and control. According to the protection layer drilling grading regulation and control method for coal rock gas disasters, multiple functions are integrated into a single drilling hole, resource saving, cost reduction and efficiency improvement are achieved, mine environment interference is effectively reduced, meanwhile, the state of a coal rock gas system is continuously regulated and controlled, the timeliness and flexibility of disaster prevention and control are ensured, and the protection layer drilling grading regulation and control method is suitable for popularization and application. The method adapts to different geological conditions, enhances coal mine safety, embodies double benefits of green mining and economic optimization, and marks the leading-edge progress of a coal mine safety technology.

The invention relates to the technical field of intelligent control, in particular to an intelligent slurry discharge pressure control method for underground cemented filling, which comprises the following steps of: 1, establishing a model capable of reflecting expected normal slurry discharge pressure under the current working condition according to parameters of the current working condition to obtain the expected normal slurry discharge pressure; 2, comparing the real-time measured slurry discharge pressure with the expected normal slurry discharge pressure, and judging whether abnormal rise exists or not; 3, setting an abnormal time window, and performing severity evaluation on the identified pressure abnormity by considering a time accumulation effect to obtain an abnormity severity index; and 4, according to the abnormal severity index, the slurry discharging flow is automatically adjusted to the target slurry discharging flow by adjusting the rotating speed of the control pump. According to the method, the safety guarantee level of the underground cemented filling pipeline conveying process is remarkably improved.

The invention discloses an optimal control method for a long-wall roadway-by-roadway cemented filling system, and relates to the technical field of data processing and automatic control, the method comprises the following steps: step 1, sampling particles of each component in filling slurry to obtain physical parameters of the particles of each level; calculating an inhibition factor in the hydration reaction; calculating a particle characteristic coefficient of the filling slurry according to the physical parameters and the inhibition factors; 2, calculating the hydration degree based on the particle characteristic coefficient; establishing a rheological strength coupling model according to the particle characteristic coefficient and the hydration degree; pipeline conveying pressure loss prediction is carried out, and predicted pressure loss is obtained; according to the pressure loss and the hydration degree, a preset strength development model is used for calculating the filling strength; 3, calculating an optimal proportion vector of the filling slurry according to the step 1 and the step 2; and calculating an optimal control parameter vector according to the step 1 and the step 2. According to the invention, intelligent management of the filling process is realized.

The invention relates to the technical field of mine filling, in particular to a filling method of a mine cementing material based on a volume ratio. The method comprises the following steps: for different filling strengths, adaptively generating a filling formula through an adaptive multivariable ratio optimization algorithm, and obtaining a reference formula set; during mine filling operation, process parameters are obtained in real time, and in combination with the reference formula set, the volume ratio of the cementing material to the tailing slurry in the finished product slurry is calculated; calculating the real-time addition amount of the cementing material based on the volume ratio of the cementing material to the tailing slurry; a delay compensation and multi-dimensional optimization predictive control algorithm is introduced, the real-time addition amount of the cementing material is optimized, and the corrected addition amount of the cementing material is obtained; and based on the corrected cementing material addition amount, filling of the mine cementing material is achieved. The technical problems that in the mine filling process, control over the adding amount of the cementing material is not accurate, and self-adaption is poor are solved.

The invention relates to the technical field of mine filling control, in particular to a multivariable layered adaptive filling regulation and control method based on reinforcement learning, and the method comprises the steps: constructing a state vector; inputting the state vector into a target reinforcement learning strategy network model to obtain a target action parameter and state value estimation; judging whether an expected standard is met or not based on the state value estimation, and if yes, adjusting a filling control parameter of the filling system based on the target action parameter; in response to completion of adjustment of the filling control parameters of the filling system, state characteristic functions corresponding to the filling system in the current control period are constructed, and a multi-dimensional reward function is constructed based on the state characteristic functions; and judging whether to trigger strategy update based on the control cycle number and the current accumulated reward value, and if so, updating the target reinforcement learning strategy network based on the multi-dimensional reward function. According to the invention, adaptive coordination optimization of a multivariable target can be realized, and the precision and stability of filling control are effectively improved.

The invention relates to the technical field of gangue filling, in particular to a coal mine gangue roadway type filling method which comprises the following steps: (1) screening gangue, and classifying the gangue into corresponding particle size groups according to particle sizes; (2) designing grading schemes according to the particle size groups divided in the step (1), performing simulation by using PFC2D numerical simulation software to obtain stress-strain curves of the grading schemes, and selecting the grading scheme with the maximum peak stress as the optimal grading scheme; and (3) filling the roadway type filling area according to the optimal grading scheme determined in the step (2). According to the method, the optimal grading scheme is determined by simulating the stress damage process of the internal structure of the original waste rock filling body under different particle size grading schemes through PFC2D, simulation verification shows that the stress concentration condition of the left side and the right side of the filled roadway is improved, the filling body filled in the roadway can replace roadway surrounding rock to bear part of pressure, and the working efficiency is improved. The problem that the crushing pressure is large when small-particle gangue is used in the prior art is solved.

The invention relates to the technical field of mine grouting construction, in particular to gold mine underground high-pressure grouting, filling and curing equipment and method.The gold mine underground high-pressure grouting, filling and curing equipment comprises a mortar system arranged on a mine well, a grouting and filling system arranged under the mine well and a pumping system for connecting the mortar system with the grouting and filling system and pumping mortar at high pressure; the grouting and filling system is a grouting and filling robot; the grouting and filling robot comprises a vehicle platform based on a wheel type or a crawler type, a filling tank arranged on the vehicle platform, a mortar output module used for pumping mortar in the filling tank out in a pressurized mode and a grouting and filling module which communicates with the mortar output module and can pump the mortar out at high pressure and conduct directional grouting into a pre-formed drill hole. By arranging the rotary steering engine, the swing rod, the lead screw, the screw rod and the camera, the drilling position can be monitored in real time, the grouting filling module can be automatically adjusted, high-precision control over underground grouting is achieved, and meanwhile intervention of manual operation is reduced.

The invention discloses a carbonized composite cementing material as well as a preparation method and application thereof, and belongs to the technical field of solid waste resource utilization and green underground filling materials. Preparation raw materials of the carbonized composite cementing material comprise a base material, water and CO2, and the base material comprises the following components in parts by mass: 20-90 parts of fly ash, 5.5-45 parts of slag powder and 4.5-55 parts of carbide slag powder; the mass ratio of water to the base material is 0.5: 1, and the proportional relation of CO2 to the base material is 1.7 L: 1 kg. The preparation method comprises the following steps: crushing carbide slag and blast furnace slag to obtain carbide slag powder and slag powder; uniformly mixing the base materials, and adding water to prepare slurry; and introducing CO2 into the slurry, and uniformly stirring to obtain the composite material. The carbonized composite cementing material provided by the invention is excellent in performance, can replace a cement material to effectively fill underground pores, also greatly reduces CO2 emission, and provides an effective technical scheme for resource utilization of industrial solid wastes.

The invention provides a safe, efficient and high-recovery-rate segmented medium-length hole mining method, and belongs to the field of underground mining. Firstly, presplitting blast holes are formed in rock drilling roadways at the bottoms of stopes, ore bodies at the boundaries of every two adjacent stopes are divided into triangular jambs, and the presplitting blast holes are charged at intervals and subjected to blasting presplitting; separating the top boundary of the triangular jamb from the mining lower boundary of the stope, performing blasting recovery and filling on the triangular jamb, and performing blasting recovery and filling on the normal ore body of the stope. According to the method, the bottom structure of the stope is optimally arranged, ore body mining boundary control is achieved, meanwhile, the stoping sequence is adjusted in a matched mode, ore resources pressed and covered in a triangular pillar area are effectively recycled, construction safety is guaranteed, the situation of mining under a filling body is avoided, and the mining efficiency is improved. And the lean loss index of ore resource recovery is accurately controlled, and the recovery of the triangular jambs and the normal recovery of the stope are orderly linked, so that the efficient production of the stope is realized.

The invention discloses a negative carbon filling mining method for a gangue high-porosity material, and relates to the technical field of CO2 storage and filling mining, which comprises the following steps: spraying a rapid cementing material while blanking a gangue bulk material, forming a high-porosity filling body in a goaf, continuously injecting liquid CO2 into the closed high-porosity filling body through a pipeline, and filling the high-porosity filling body into a high-porosity filling body. The underground efficient sealing of CO2 is realized; the method is simple in design, the filling technology and CO2 storage are combined, efficient mining and filling are achieved, coal resource mining is not affected, the mine green mining and negative carbon filling construction process is promoted, a new concept of carbon storage is provided, wide application and research significance is achieved, and compared with a solid filling mining method, the method has the advantage that the method has a wide application prospect. And the gangue is fixed by using the rapid binding material to form a high-porosity material with bearing performance, so that the cost of a filling mining technology is reduced, and the original tamping process is simplified.

The invention provides a goaf directional drilling grouting reinforcement method which comprises the following steps: S1, determining a goaf treatment engineering grade and a design standard, and delimiting a goaf treatment range according to the engineering grade and the design standard; the method comprises the steps of S1, determining the position, coordinates and spatial arrangement of a drilling target spot, S2, determining the position, coordinates and planar arrangement of a directional well site, wellhead coordinates and planar arrangement of a directional well site, S4, designing a drilling track form and a drilling well bore structure, and S5, designing a drilling track form and a drilling well bore structure, the drilling track form comprising at least one of a straight line-curve form, a straight line-curve-straight line form and a straight line-curve-curve form. And S5, the drilling technology and drilling track control are determined, and drilling and drilling track control are conducted through directional drilling track measurement control equipment, near-bit geosteering equipment and rotary steering drilling equipment. The goaf directional drilling grouting reinforcement method is wide in treatment range, low in treatment cost and low in construction risk.

The invention discloses a carbon storage space construction method for an artificial reconstruction plugging key layer, and the method comprises the following steps: S1, carrying out geological exploration, and determining the thickness and lithology of each overlying rock stratum; s2, determining the height of a gas guide fissure zone generated after the coal seam is mined by filling based on theoretical analysis and actual measurement data; s3, on the basis of geological data and the height of the gas-conducting fissure zone, the position of an artificial reconstruction plugging key layer and the position of a grouting layer are determined; s4, filling mining is carried out, grouting is carried out on overlying strata to reconstruct and block a key layer, and a carbon storage space is formed; and S5, carbon dioxide gas is injected into the goaf through a pipeline, carbon dioxide concentration monitoring is conducted on the working face while negative carbon filling is conducted, earth surface rock movement monitoring is conducted on the earth surface, and the negative carbon filling effect is judged. According to the method, the carbon storage space is formed by manually rebuilding and blocking the key layer while the gangue is filled, the space after coal mining can be effectively utilized for storing carbon dioxide, and emission of greenhouse gas is effectively reduced.

The invention provides a mineralization grouting method for reinforcing sequestration of carbon dioxide, and belongs to the technical field of underground goaf grouting filling, the working process comprises the steps that supercritical CO2, micro-nano filler and calcium-containing solid waste are jointly mixed and mixed into slurry, the slurry is injected into a goaf, part of CO2 is turned into a gaseous state to escape in the state of being lower than the supercritical pressure of CO2, and then the CO2 is discharged; bubble cores are formed on the surface of the micro-nano filler, and uniformly distributed micropores are formed in a stone body after the slurry is solidified. Due to the fact that the micropores can seal gaseous CO2, the carbon sequestration amount of the slurry per cubic meter can reach 150-350 kg, and the carbon sequestration capacity of the slurry is higher than the carbon sequestration capacity of a common grouting material. The technological method is easy to operate, supercritical CO2 reacts with the slurry, a large amount of CO2 in the shallow goaf is stored, the solid waste material is used for grouting, meanwhile, the carbon sequestration amount of the slurry is increased, and the grouting cost is saved.

The invention discloses a coal mining intelligent control method and system based on paste filling, and the method comprises the steps: obtaining the underground environment of a coal mine and the geological condition data of a filling area, building a paste filling three-dimensional digital model according to the geological conditions and goaf forms of different filling areas, and enabling the model to comprise the attribute information of a paste ratio, pumping parameters and the like; the method comprises the following steps: arranging a multi-parameter sensor at a key position of a paste conveying pipeline, collecting rheological characteristic parameters, including viscosity, density, sand content, particle distribution and the like, of paste in the pipeline in real time, and forming a paste rheological characteristic data set; and the optimized paste proportion and pumping parameters are input into a paste preparation system and a pumping control system, the preparation and conveying process of the paste is dynamically controlled in real time, and it is ensured that the performance of the paste meets the filling requirement.

The invention discloses an intelligent data acquisition and optimization control system applied to a mine filling system, and relates to the technical field of computer automatic control, the system comprises an ore body stress analysis unit, a filling slurry solid phase mass analysis unit, a filling body physical property analysis unit and a filling control and analysis unit; the ore body stress analysis unit is used for establishing a three-dimensional ore body geometric model according to an ore body geological exploration result, dividing the three-dimensional ore body geometric model into finite element grids and calculating the solid phase mass concentration of filling slurry; the filling body physical property analysis unit is used for establishing a rheological model of the filling slurry according to the solid phase mass concentration of the filling slurry; and the filling control and analysis unit is used for calculating the filling stability according to the three-dimensional stress tensor field of the ore body and the pore water pressure of the filling slurry to obtain a stability coefficient. The filling speed can be intelligently controlled, the construction stability is evaluated in real time, and the safety and high efficiency of the filling construction process are ensured.

The invention relates to a mining damage control method for multi-medium carbon pollution cooperative reduction and control and resource application, and belongs to the technical field of full-waste resource treatment and utilization of a short-distance coal seam mining goaf. The mining damage control method comprises the following steps that filling liquid and filling materials are stirred and mixed while carbon dioxide gas is introduced to form filling slurry; then all-directional shower type spraying is conducted from the filling pipeline to the goaf; performing full grouting on the goaf in a sealed form until the goaf is full, introducing carbon dioxide into the goaf while performing full grouting, monitoring and analyzing underground behaviors, rock reaction and rock stratum stability of carbon dioxide in a backfilling area, and when underground water exists in a sealing and storing area, establishing an underground water monitoring system to monitor the water quality of the underground water; the power plant flue gas is treated and then injected into the goaf to be mixed with the filling material, so that the oxygen concentration of the goaf is effectively reduced, goaf fire disasters are prevented and treated, mining disasters in the goaf are effectively controlled, and the stability of rock strata is improved.

The invention discloses coal mine water-preserved mining grouting and filling equipment and technology, and relates to the technical field of mining and filling, the coal mine water-preserved mining grouting and filling equipment comprises a coordination assembly, a grouting assembly and a grouting assembly, the coordination assembly comprises a pressure meter and an external connector, and the pressure meter and the external connector are connected through a transmission pipe; the output end of the driving pump is connected with a flow meter, an inlet of the flow meter is connected with the coordination assembly through the transmission pipe, and the outlet end of the flow meter is connected with the grouting assembly through the transmission pipe; the control valve is arranged between the flow meter and the grouting assembly, and the grouting assembly is inserted into the soil layer structure; the grouting assembly comprises a socketed pipe, an adapter, a grouting head, a processing pipe, a rotating ring and a supporting assembly. According to the technical scheme, grouting liquid can be more evenly filled, and the remedy risk is reduced.

The utility model relates to the technical field of coal mine paste filling, in particular to an end plugging support for coal mine paste filling, which comprises a base, a lower baffle and an upper baffle, the lower baffle is arranged on the side face of the base, the upper baffle is arranged at the upper end of the lower baffle, and a connecting structure is arranged on the side face of the lower baffle. Firstly, the multiple supports are attached together side by side, then the connecting bolts are inserted into the connecting blocks on the side edges of the two supports, then the nuts are screwed to the surfaces of the connecting bolts to connect and fix the supports, then the limiting rods are placed on the surfaces of the fixing blocks, and then the fixing covers are placed above the fixing blocks. The fixing cover and the limiting rod are attached, and the fixing bolt is screwed into the fixing block to fix the fixing cover, so that the limiting rod limits the supports, and the situation that the supports are misplaced, consequently, gaps exist between the supports, liquid leakage occurs, and the blocking efficiency is reduced is prevented.

The invention relates to the field of fault early warning, in particular to a fault early warning method for a tailing paste filling system. Comprising the steps of monitoring and storing parameters in real time to form a parameter matrix; a sliding time window technology is introduced, standardization processing is carried out on the parameters at each moment, and standardized parameter values are obtained; on the basis of the standardized parameter values, a dynamic feature extraction algorithm is adopted for processing to obtain feature values; based on the characteristic value, a fault probability value is calculated through a dynamic gain adjustment fault probability calculation algorithm, the fault probability value is compared with a fault threshold value, and a fault judgment result is obtained; according to the characteristic value and the fault judgment result, a saliency score is calculated through a fault positioning algorithm, and a fault source is determined according to the saliency score; and performing fault early warning based on the fault source. The technical problems that in a tailing paste filling system, multiple monitoring points exist, so that real-time data processing becomes complex, and unified comparison and analysis are difficult to conduct are solved.

The invention provides grouting and filling equipment for water-preserved mining of a coal mine, and relates to the technical field of mining equipment, and the grouting and filling equipment comprises a base frame piece, a grouting guide pipe piece, a slurry post-processing assembly and a plugging driving assembly. A plurality of groups of outer ring parts with hole wall pressure sensors are arranged on the outer wall of the grouting guide pipe piece, and a pipe end micro sensor is arranged at the grout outlet end; the inserting and pulling driving assembly drives the stirring assembly to push the outer ring part through the motor, and inserting and pulling of the grouting guide pipe piece are controlled. During working, the guide pipe piece is inserted into a grouting hole to a goaf, the sensor monitors rock mass pressure, temperature and sound wave signals in real time, the grouting pressure is dynamically adjusted in combination with formation resistance, and grout fluid channeling or insufficient filling is avoided. Through precise pressure regulation and automatic insertion and extraction, the problems of material waste, underground water pollution and insufficient goaf filling in traditional grouting are solved, and the environmental protection property and the engineering efficiency of water-preserved mining are remarkably improved.

The invention relates to the technical field of mine solid waste treatment and carbon dioxide sealing and storage, and particularly discloses a system and a method for sealing and storing carbon dioxide by utilizing coal-based solid waste and mine water to prepare slurry. The system comprises a cement bin, a gangue bin, a coal ash bin, a gasified slag bin, a mine water storage tank, a stirring reaction kettle, a carbon dioxide storage tank, a slurry temporary storage tank, a vacuum pump and a slurry pump, and the stability and adsorption efficiency of carbon dioxide fixation are improved in the mode that coal-based solid waste, mine water and carbon dioxide are subjected to chemical reaction and physical adsorption; meanwhile, the prepared backfill slurry has high-strength anti-pressure ability, the stability of the backfilled underground goaf is better improved, further, coal-based solid waste and mine water are utilized for waste recycling, and the carbon dioxide storage cost is reduced.