2030results 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 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 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 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 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 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 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 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 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.

The invention relates to the technical field of industrial solid waste resource utilization, and particularly discloses a geopolymer-based rare earth tailing curing material and a preparation method thereof, the geopolymer-based rare earth tailing curing material comprises 8%-15% of mineral powder, 20%-25% of fly ash, 20%-35% of rare earth tailings, 0.5%-3% of fiber, 0.5%-1% of nano oxide, 15%-20% of an alkaline activator and 15%-36% of water. The geopolymer-based rare earth tailing curing material provided by the invention has the advantages of excellent mechanical properties, good fluidity, appropriate curing time, environmental friendliness and the like, and is suitable for ecological restoration of mines, treatment of tailings ponds and preparation of road base materials; according to the invention, industrial wastes (such as fly ash, slag and rare earth tailings) are used, so that resource recycling is realized; the carbon emission is low in the production and use process of the material, and the sustainable development requirement is met.

The invention discloses a double-row medium-length hole blasting method for a filling stope. According to the method, a theoretical value range of each blasting parameter is deduced according to field engineering practice, an ore rock blasting crushing mechanism and a blasting parameter theoretical formula. The method comprises the following steps of: constructing a stope blasting model with different hole bottom distances, explosive unit consumption and resistance line combinations by using ANSYS numerical simulation software in combination with physical and mechanical properties of ore rocks and field explosive performance parameters, and preferably selecting double-row medium-length hole blasting parameters according to a chamber effective stress distribution rule and a roof area vibration velocity peak value of the ANSYS blasting model. According to the method, by selecting the double-row optimal medium-length hole blasting parameters, it is guaranteed that ore rocks in the chamber are fully crushed, the effective stress invading the roof and the blasting vibration velocity peak value are reduced, and the roof is prevented from being damaged. And meanwhile, the explosive loading amount is reduced, the economic cost is reduced, and the production efficiency of a mine is improved.

The invention relates to a deep stratum well hole and cave mining system which comprises a traffic well system at least provided with two well holes communicating with a cave, a through-well-hole three-dimensional mining device and a control mechanism, the traffic well system is provided with a flow-back channel and an injection channel, and an internal channel formed by the well holes is configured to be a flow-back channel and an injection channel. The through-hole three-dimensional excavating device is used for carrying out form-controllable excavating on the cave; the through-well-hole three-dimensional filling device and / or the through-well-hole three-dimensional cleaning and transporting device are / is provided with a control mechanism, and the through-well-hole three-dimensional filling device conveys flow-state filler to the cave to conduct controllable-state filling so as to reduce the free space size of the cave; and the three-dimensional cleaning and transporting device for passing through the well hole is provided with a control mechanism, and the three-dimensional cleaning and transporting device for passing through the well hole cleans ore particles in the cave or transports the ore particles to the flowback channel, so that the circulating fluid discharges the ore particles out of the cave through the well hole. According to the invention, safe and efficient mining operation of a deep stratum can be realized.

The invention provides a coal seam sandstone roof water retention coal mining method with control while mining based on mining-induced fracture grouting. The coal seam sandstone roof water retention coal mining method comprises the steps that hydrogeological parameters of a target working face of a coal mine are obtained; according to the hydrogeological parameters, determining a roof fracture step pitch of the target working face, determining stratum distribution characteristics above the target working face, and determining simulated development characteristics of a flowing water fractured zone of the target working face; determining a grouting horizon according to the simulated development characteristics of the water-flowing fractured zone and the formation distribution characteristics; the target working face is subjected to stoping, and after the stoping distance reaches the roof fracture step pitch every time and the roof of the target working face is fractured, layered grouting is conducted on the grouting layer position corresponding to the target working face in the roof fracture step pitch till stoping of the target working face is completed completely. And after layered grouting of all the grouting layers corresponding to the target working face is completed, operation is finished. The coal seam sandstone roof water retention coal mining method with control while mining based on mining-induced fracture grouting is high in safety and water control mining efficiency, and resources are saved.

The invention provides a potassic salt ore old brine-tail salt full-recycling cemented filling process based on magnesium-calcium synergistic conversion, and belongs to the field of potassic salt ore goaf filling, CaO is added into old brine for reaction to obtain Mg (OH) 2 / Ca (OH) 2 mixed precipitate, then a dispersing agent is added, and solid-liquid separation is performed to obtain a solid mixture and a post-reaction mother solution; dividing the tail salt into particle sizes gt according to particle sizes; the method comprises the following steps: mechanically grinding coarse tail salt with the particle size of 75 microns and fine tail salt with the particle size of less than or equal to 75 microns until the particle size lt is reached; filtering to obtain activated crude tail salt; mixing the fine tail salt with an exciting agent, and activating through ball milling to obtain activated fine tail salt; and mixing the activated crude tail salt, the activated fine tail salt, the solid mixture and the reacted mother liquor, adding a retarder and a water reducing agent, stirring to obtain filling slurry, and pumping the filling slurry into a well for filling in multiple layers. According to the method, Mg < 2 + > in old brine is directionally converted through calcium oxide to generate a Mg (OH) 2 / Ca (OH) 2 gelling phase, and a low-cost and high-strength filling system is formed by combining a tail salt grading activation technology.

The invention provides a subsection medium-length hole mining method for top pretreatment under the condition of broken ore rock, and belongs to the field of mining. According to the method, before each stope of a to-be-mined subsection is mined, a drilling roadway of each stope in an adjacent upper subsection is constructed in advance, and the drilling roadway is pre-supported; a horizontal blast hole perpendicular to the lateral wall of the rock drilling roadway is constructed in the bottom of the rock drilling roadway, the horizontal blast hole is blasted in a spaced charging mode in the trend of the rock drilling roadway, and a bottom plate of the adjacent upper section stope is separated from a top plate of the stope to be mined. According to the method, pretreatment and pre-supporting of the top of the stope are combined, the effect of stabilizing the rock drilling roadway and the bottom jambs in the upper subsection stope is achieved, and the phenomenon that the rock drilling roadway and the bottom jambs are affected by blasting disturbance and an empty stope during stoping in the lower stope under the condition of broken ore rocks, and the structure is damaged and collapses is avoided; according to the scheme, production connection between the stopes of the upper section and the lower section is more compact, the mining progress and safety of the stopes are improved, the process is simple, and the practical application value is high.

The invention discloses a caving zone filling method based on solid-liquid-gas three-waste synergistic mineralization, and relates to the technical field of mine filling. Comprising the following steps that goaf grouting filling parameters are determined through a multi-source data fusion analysis method; the filling material is prepared by taking mining area solid wastes, mining area liquid wastes and gas wastes as basic materials; filling materials are injected into the residual space of the caving zone of the goaf of the underground working face through a ground grouting filling system, the loose gangue structure in the goaf is cemented, and a filling body is formed; the method realizes the utilization of solid-liquid-gas three wastes in the mine, achieves the purposes of reducing ground surface settlement, protecting water resources and the like, and accords with the low-carbon and high-efficiency mineral development concept.

The invention discloses a pre-filling replacement section coal pillar double-roadway-reserved coal mining method which comprises the following steps: arranging a transportation uphill and a rail uphill in a coal seam along the inclination direction, pre-digging a transportation gate road and a rail gate road in the coal seam, forming a filling working face after the two gate roads are communicated, and simultaneously arranging the two filling working faces to carry out advancing type stoping, and solid waste material cemented filling is conducted on the goaf of the filling working face, after stoping filling of the two filling working faces is finished, a long-wall working face is formed by penetrating through the two adjacent crossheading of the two filling working faces, and retreating type stoping is conducted. A traditional section protection coal pillar is omitted, and the coal recovery rate is increased; meanwhile, resource utilization of the coal-based solid waste is achieved, and the problems of land resource waste and environmental pollution are solved.

The invention discloses a novel pillar-free shallow hole shrinkage mining method with stud recovery, which comprises the following steps of: stoping ore bodies from top to bottom, and stoping a to-be-mined room (9.1) and a to-be-mined stud (8.1) of a next middle section after stoping of the previous middle section of ore body is finished; a stoping stud (8.2) is communicated with an outside-vein pedestrian ventilation filling raise (6) arranged on a footwall surrounding rock (16) of an ore body through a stud connection way (5), the lower end of the outside-vein pedestrian ventilation filling raise (6) is communicated with the top of a middle section stud ore removal roadway (10), and the top end of the outside-vein pedestrian ventilation filling raise (6) is communicated with an upper middle section stud ore removal roadway (3). And the right end of the upper middle section column ore removal roadway (3) is communicated with the upper middle section haulage roadway (2). According to the method, the problems of large intermediate pillar ore loss and difficulty in recovery in a traditional shallow hole shrinkage method are solved, the resource recovery rate is increased to 88% or above, the compressive strength of the filled artificial intermediate pillar is superior to that of a primary pillar, and the stope stability is remarkably improved.

The invention discloses an efficient filling method for an underground small goaf group, and the method comprises the steps: constructing a three-dimensional model through laser radar scanning, and marking a communication relation and the stability of a top plate; dividing the goaf group into a main filling area and a secondary filling area, and designing a fractal topological structure drainage channel to form a gravity flow network; preparing filling slurry taking a cementing material, tailings and the like as main materials, and controlling parameters such as slump, initial setting time and the like; then, stepped pressure self-adaptive filling is adopted, slurry is injected in two stages, and the pressure and the flow speed are controlled; according to the method, the problems that traditional filling blind areas are large in number, material waste is serious and efficiency is low are solved, low-pump-pressure global coverage is achieved, the roof contact rate is remarkably increased, safe and efficient mining of mines is guaranteed, the comprehensive cost is reduced, and the method is suitable for underground small goaf group filling.

The invention relates to a filling cementing material as well as a preparation method and application thereof. The filling cementing material comprises blast furnace slag powder, fly ash, superfine tailing micropowder, an alkaline activator and a sulfate activator, the specific surface area of the superfine tailing micro powder is 600 to 800 m < 2 > / kg. The technical problem to be solved is how to provide the filling cementing material, the performance of the tailing micropowder can be activated to enhance the bonding effect of the filling cementing material, and the mechanical strength and the cementing effect of the filling cementing material are enhanced through the synergistic effect of the superfine tailing micropowder and other raw materials, so that not only is the industrial solid waste of the tailing treated, but also the economic benefit is improved. And cement is avoided, so that carbon reduction and environmental protection are facilitated.

The invention discloses a filling mining method based on stage reverse medium-length hole groove broaching, which relates to the technical field of mining, and comprises the following steps: stope structure parameter design, mining preparation engineering construction, cutting engineering, stoping process and filling process are carried out in sequence, the cutting project comprises the steps of cutting courtyard rapid forming, cutting groove broaching and cutting groove rapid penetrating; and the cutting courtyard is rapidly formed by adopting a laser pre-splitting auxiliary blasting process. According to the method, the cutting and groove broaching processes are deeply optimized, so that the overall efficiency of underground mining is remarkably improved. In the cutting courtyard forming stage, the laser presplitting auxiliary blasting technology is introduced, so that the rock integrity is reduced, the blasting energy is more concentrated, the effect is more accurate, the problems of perforation, rock slag squeezing and the like in the traditional process are effectively avoided, the explosive loading amount can be reduced, disturbance of blasting vibration to surrounding rock is reduced, and the blasting quality is improved. And a safer technical support is provided for high-stress ore body mining.

The invention discloses a false-inclined multi-layer strip mining method for gentle-inclined medium-thickness underground sedimentary bauxite. The method is particularly suitable for safe and efficient mining of gentle-inclined medium-thickness bauxite with an unstable top plate. An in-vein middle-section transportation roadway is arranged in an ore body to divide the ore body into different middle sections, top and bottom columns are reserved between the middle sections, mining areas are divided in the middle sections in the moving direction of the ore body, columns are reserved between the mining areas, a mining area slope ramp, a lower layered ore loading gate way, a segmented transportation gate way, a layered connection way and an upper layered cutting gate way are respectively tunneled, and strips of two specifications are arranged; the arranged mining areas, ore blocks, mining area ramps, strips and studs are all arranged in a pseudo-inclined mode, the stoping operation is divided into two steps for layered stoping, the strips of 3-5 m are firstly stoped, the strips of 6-8 m are then stoped, according to the stoping sequence that the lower layer is firstly stoped and then the upper layer is stoped, and filling is conducted in time after each layer is stoped. The method is in-vein engineering and has the advantages of being small in mining and cutting engineering amount, good in safety and economical efficiency, high in recovery efficiency and the like.