31 results about "Mining engineering" patented technology

The invention discloses a method for treating heavy inclined seam gob-side entry retaining gangue.Firstly, metal nets are suspended to form a gangue blocking barrier structure, a gangue heap is formed, and a gangue wall is formed after grouting; secondly, by means of anchor cable reinforcing, a first gangue wall anti-slippage structure is formed, and a paste filling body is constructed after the first gangue wall anti-slippage structure is stable; thirdly, at the same time, lagging supporting is conducted on the other side roadway wall of gob-side entry retaining through a traditional supporting method; fourthly, after the intensity of the paste filling body is stable, a second filling body anti-slippage structure is constructed on the paste filling body; fifthly, the second step to the sixth step are conducted while the working face is propelled until coal mining of the coal mining working face is finished, and meanwhile the gob-side entry retaining is formed.According to the method, fallen gangue is utilized, the inburst rate of gravity-glider gangue of an inclined breaking roof gob to a mining roadway is reduced, control over slippage of filling bodies beside an inclined seam into the roadway due to gravity is achieved, and mining of excavation and recovering of the coal face is improved.

The invention provides an automatic production system of a rock wool sandwich board, and belongs to the technical field of machinery. The problem of inconvenient production of an existing rock wool sandwich board is solved. The automatic production system of the rock wool sandwich board includes a material feeding mechanism, a plurality of auxiliary mechanisms, two glue spreaders, two turnover mechanism and a detecting and stacking mechanism, wherein the material feeding mechanism comprises a material feeding table and conveying tables, a first steel plate and a plurality of rock wool strips are placed at the bottom of the material feeding table, and a mechanical hand is installed above the material feeding table and used for transferring the first steel plate and rock wool strips to the conveying tables; each auxiliary mechanism consists of a lifting platform and one conveying table, the conveying tables are arranged in a same straight line, and the glue spreaders and the conveying tables are arranged in a same straight line; the turnover mechanisms and the conveying tables are arranged in a same straight line, and the detecting and stacking mechanism comprises a positioning table, a detecting table and a stacking tank; the rock wool sandwich board is formed after the rock wool strips pass through the conveying tables sequentially, and pass through the positioning table, detecting table and stacking tank for detection and stacking work. The automatic production system has the characteristic of a good production effect.

The invention discloses a coating material for sealing the coal wall of a gob-side coal roadway. The coating material comprises 100 parts of cement, 3-6 parts of an environmentally-friendly interfacepolymer solid material and 10-15 parts of a mineral mixture and other additives, the environmentally-friendly interface polymer solid material comprises, by mass, 100 parts of an acrylate polymer solid and 8-9 parts of polyethylene synthetic resin, and the mineral mixture and other additives comprise, by mass, 5-10 parts of silica fume, 10-15 parts of common fly ash or slag, 1-2 parts of a superplasticizer and trace parts of basalt chopped fibers. The coating material is a novel composite material for guniting, and meets the requirements for plugging the coal wall of the gob-side coal roadway.

The invention discloses a pit digging working head for afforestation on a difficult site and a working method thereof. The pit digging working head for afforestation on the difficult site structurally comprises a rack capable of controlling feeding movement, wherein one side of the upper part of the rack is connected with a supporting plate through a connecting frame, the supporting plate is provided with a hydraulic motor, the bottom of the hydraulic motor is connected with a drill rod through a gearbox, and the bottom of the drill rod is used for mounting a drill tip or a soil cutting blade; spiral fins are annularly arranged on the side wall of the drill rod, the lower part of one side, away from the supporting plate, of the rack is mounted on a chassis hanging plate, the chassis hanging plate is used for being connected with a power chassis, and the rack further comprises a soil cleaning device used for cleaning soil on the spiral fins after pit digging is completed. According to the pit digging working head for afforestation on the difficult site, the angle and the diameter of each drill bit spiral fin of the working head and the length of the drill rod can be conveniently adjusted, a drill bit blade and the drill tip can be rapidly replaced, the working method of the working head under different afforestation working conditions improves the working safety under the conditions of hills, mountains and difficult sites, the working efficiency is improved, and the labor intensity is relieved.

The invention relates to the technical field of geological survey, in particular to a rapid pit digging device for geological exploration. The rapid pit digging device comprises a base plate, a fixed frame is fixedly installed at the top of the left side of the base plate, universal wheels are fixedly installed at four corners of the right side wall of the base plate, a top plate is arranged below the fixed frame, the top plate is fixedly connected to the base plate, connecting rods are fixedly installed at the four corners between the top plate and the fixing frame, connecting blocks are fixedly installed on the opposite side walls of the four connecting rods, guide rods are fixedly installed between the sets of connecting blocks and the fixing frame, and sliding plates are slidably installed between the four guide rods; an upper connecting cylinder is fixedly installed on the lower side wall of the sliding plate; and a connecting ring is fixedly installed at the bottom end of the upper connecting cylinder. Compared with the prior art, pits with different sizes can be drilled according to requirements, and the problem that the size of a pit drilled by a traditional pit digging device is fixed, and the requirement for digging the pits with different sizes cannot be met is avoided.

The invention relates to a mine pool computing power distribution method under block interception attacks among multiple mine pools. The method comprises: acquiring, by each ore pond, information conditions such as computing power and earnings of the ore pond and other ore ponds at present; representing the current effective total computing power in the block chain, the income of honest mining ofeach ore pool, the income of block interception attack, the average income of each ore pool and the like through a mathematical formula; establishing an optimization model of the income of the ore pond; according to the optimization model, under the condition that each ore pond automatically selects that the calculation force loss is fixed or the calculation force loss is variable, calculating anincome increment generated by carrying out block interception attack on other ore pools; and selecting different computing power distribution strategies according to increase and decrease of the income increment, and obtaining a computing power distribution optimization scheme of each mine pool, so that the computing power of the mine pool is reasonably distributed, the income of the mine pool isimproved, and the influence of block interception attacks of other mine pools on the income of the mine pool is reduced.

The invention relates to the technical field of coal mines, in particular to a rapid sorting machine for coal gangue of different sizes. The coal gangue screening device comprises the feeding mechanism, the screening mechanism is fixedly arranged on one side of the feeding mechanism, the blowing screening mechanism is fixedly arranged at the bottom end of the screening mechanism, and when coal gangue is conveyed through a feeding belt, a circular plate can be driven to rotate through a servo motor, so that the circular plate can drive a driving rod to rotate; according to the material distributing device, a driving rod can drive a reciprocating column to slide in a sleeving ring in a reciprocating manner, so that a reciprocating plate can be driven to slide back and forth between two sleeving plates, and a plurality of material distributing columns and a plurality of partition plates at the bottom can be driven to move back and forth; and therefore, the coal gangue particles clamped among the partition plate, the bottom of the material distributing column and the feeding belt can be brushed and cleaned, and the situation that the accumulated coal gangue particles damage the surface of the feeding belt and affect the conveying efficiency of the feeding belt is prevented.

The invention relates to the technical field of mine air measurement, in particular to a tungsten ore underground air quality measurement device. The tungsten ore underground air quality measurement device comprises a shell body, a dust-proof mechanism is fixedly connected to the shell body, a reinforcing plate is fixedly connected to the outer side of a sealing plate, fixing frames are correspondingly connected to the two sides of the outer part of the reinforcing plate, a supporting plate is fixedly connected to the reinforcing plate, a telescopic air cylinder is fixedly connected to the upper end of the supporting plate, a bracket plate is connected to the telescopic end of the telescopic air cylinder through a connecting block, a fixing box is fixedly connected to the upper end of thebracket plate, a fixing mechanism is connected into a first through hole, the fixing mechanism is connected with a detector, and an oxygen concentration sensor and a gas concentration sensor are connected to the upper end of the detector. The invention further provides a tungsten ore underground air quality measurement method. According to the tungsten ore underground air quality measurement method and device, the oxygen concentration sensor and the gas concentration sensor are pushed to move upwards through the telescopic air cylinder, the oxygen and the gas concentration content of differentheights can be detected, and thus the detection accuracy of the underground air is higher.

The invention discloses an underground mine medium-length hole blasting well formation technology. The specification of the cross section of an operated raise is 2.0 mX2.0 m, the height range of the raise is 6 m-11 m, one or two charging holes are formed in the center of a cutting raise through a mesopore trolley, empty holes are formed around the central charging hole, and peripheral charging holes are formed in the cross section of the raise in a segmented mode. By adopting the technical scheme, the central charging hole of the cutting raise is firstly blasted, then the peripheral charging holes at the corners of the hexagonal empty hole are correspondingly blasted to form a free surface and a compensation space, and finally the peripheral charging holes are blasted in sections on the cross section of the raise, so that one-time blasting well formation is realized; and the technology can guarantee the safety of the working environment, can effectively reduce the manual workload, saves the construction cost, and is suitable for tunneling operation under simple or complex conditions of blasting ore rocks.

The invention discloses an oil-gas well perforation ground monitoring method, comprising the following steps of: 1, collecting signals for vibration waves transmitting along the wall of an oil pipe when a perforating gun detonates; 2, filtering the collected signals; 3, performing short-time energy analysis to the filtered signals, comparing the analysis result with a preset threshold, if the comparison result reaches the preset threshold, determining that the detonation is successful, otherwise, repeating the steps 1 to 3. Through monitoring more than 3000 oil wells by using the oil-gas well perforation ground monitoring device, the test shows that the success rate for monitoring the detonation of the perforation is more than 96%. The maximum perforation well depth of the monitored oil wells is 7140m, and the minimum perforation well depth of the same is 119m. The oil-gas well perforation ground monitoring method is stable in performance, simple to operate and wide in application prospect. Meanwhile, through setting the threshold, an enormous database can be omitted, such that the implementation cost of the oil-gas well perforation ground monitoring method is reduced, and detonation rules are prevented from searching.

The invention discloses a three-dimensional printing material taking desulfurized gypsum as a main raw material. The three-dimensional printing material is prepared from the following components by weight percentage: 5-8% of sodium alginate, 0.5-1.2% of urea resin, 0.5-1.2% of an anti-sticking agent, 0.2-0.5% of a water reducing agent, 2-5% of a thickening agent and the balance desulfurized gypsumpowder. According to the three-dimensional printing material, low-price desulfurized gypsum powder (industrial by-product gypsum) instead of high-price alpha-calcium sulfate hemihydrate is adopted asthe main raw material, sodium alginate and urea resin are added as the binder, and the anti-sticking agent, the water reducing agent and the thickening agent are added, so that the technical effectsof high early strength and short hardening time are achieved.

The invention discloses an automatic ore feeding device for magnetic separators and an automatic ore feeding control method. A plurality of ore feeding openings in one-to-one correspondence with the parallel magnetic separators are formed in an ore distribution box, and the ore feeding openings are used for ore feeding of the magnetic separators correspondingly. A control unit is electrically connected with an ore feeding pump. The working current value of the ore feeding pump can be obtained, and the working current value of the ore feeding pump reflects the circulation amount of the ore dressing process. The control unit is electrically connected with a lifting driving mechanism and used for controlling the lifting displacement of the lifting driving mechanism. The lifting driving mechanism drives material plugs to move up and down in the ore distribution box, and therefore the opening and closing state and the opening size of each ore feeding opening are changed. According to the automatic ore feeding device for the magnetic separators and the automatic ore feeding control method, the on-site flow quantity change condition can be automatically detected, the automatic adjustmentof the ore feeding quantity of the magnetic separators, the start and stop of the magnetic separators and other operations are realized according to the flow quantity change condition, the convenienceof reasonably operating the number of the magnetic separators is improved, the frequency of climbing an ore distribution box platform of the magnetic separators by on-site operators is reduced, the labor intensity of the operators is reduced, and operation safety is ensured.

The invention is applicable to the field of coal mine production, and provides a conveyor for coal gangue feeding, which comprises a main box body, a driving unit, a conveying roller and an additional box body, the main box body is provided with a feed opening, and one side of the main box body is of an open structure; the driving unit is arranged at the inner bottom of the main box body, the output end of the driving unit is located on one side of the outer portion of the main box body, a plurality of installation shafts which are transversely arranged at intervals are rotationally connected to the main box body, the conveying rollers are located in the main box body and fixedly connected to the installation shafts in a matched and sleeved mode, and a first transmission mechanism is arranged on the outer side of the main box body. And the output end of the driving unit drives the plurality of mounting shafts to synchronously rotate in the same direction through a first transmission mechanism. The coal gangue conveying device has the beneficial effects that the stacking characteristic of coal gangue is utilized, the main box body is pushed into a coal gangue pile from the bottom, and natural collapse type discharging of the coal gangue is utilized to replace a conventional auxiliary mechanical carrying mode.

The invention belongs to the technical field of clay sculpture cotton mud processing, particularly relates to clay sculpture cotton mud manufacturing equipment, and aims at achieving the technical purpose of providing automatic-stirring and simple-operation clay sculpture cotton mud manufacturing equipment. The clay sculpture cotton mud manufacturing equipment comprises a base symmetrically provided with straight sliding grooves, a containing plate arranged on the straight sliding grooves in a sliding manner, a stirring pot arranged on the containing plate, a stirring device and a lifting adjusting device provided with the stirring device, wherein the side, close to the edge of the stirring pot, of the base is provided with the lifting adjusting device. The lifting adjusting device is usedfor driving the stirring device to move up and down, the stirring device can be separated from the stirring pot and is fixed to the upper side, and work personnel can conveniently add cotton.

The invention discloses a coal mine crushing device for coal mining. The coal mine crushing device comprises a crusher, a discharging channel and a dust removal mechanism; a feeding port and a discharging port are formed in the crusher; the discharging port communicates with the discharging channel; the dust removal mechanism comprises a water spraying unit and a dust suction unit; the water spraying unit comprises a push rod, an inclined plate, a solution cylinder and a first piston used in cooperation with the solution cylinder; the solution cylinder is filled with water; and the dust suction unit further comprises an air cylinder, a plurality of pressure springs and a second piston used in cooperation with the air cylinder. According to the coal mine crushing device, corresponding water spraying cooling treatment can be carried out on a coal mine which is just rolled and crushed, and dust removal can be carried out on the coal mine through sprayed water; and meanwhile, dust is further removed through the dust suction unit, and through double dust removal operation, the crushing device can have a better dust removal effect.

The invention discloses an oil fume controlling method and system based on an object identifying model, and computer equipment. The oil fume is prevented from diffusing by a high velocity air stream longitudinally surrounding between an oil fume outlet and an oil fume suction area. The high velocity air stream is directed from the oil fume outlet to the oil fume suction area. The controlling method includes the steps that information of an oil fume produced by different cooking processes is collected; the information of the oil fume is marked, and a training set needed for oil fume identification is made; the training set is input into the object identifying model, and an oil fume identifying model is trained and formed; and the real-time oil fume information is input into the oil fume identifying model, an oil fume concentration is obtained, and the height of the air outlet position or the initial air speed of the high velocity air stream is controlled according to the concentration of the oil fume.

The invention discloses a mining rock drill. The mining rock drill structurally comprises a grip, a machine head, a driving box, a rock drilling mechanism and a side grip; the grip is horizontally installed at the upper end of the machine head, the driving box is vertically installed at the lower end of the machine head, the rock drilling mechanism is vertically fixed to the lower end of the driving box, and the side grip is installed at the side end of the driving box; the rock drilling mechanism comprises a fixing seat, a steel chisel structure and an impact head; and the steel chisel structure is vertically embedded in the inner side of the fixing seat, and the impact head is arranged on the outer side of the steel chisel structure in a sleeving mode. According to the mining rock drill,the lower end of the fixing seat is provided with the steel chisel structure so that the outer side making contact with rock can be blocked, generated dust is prevented from flying outwards and is centrally discharged better, and the operation visual field of a worker is ensured; and the upper end of a sliding structure is provided with a movable structure, position adjusting is conducted as themining rock drill goes deep into rock, the dust is gathered all the time, dust drifting is reduced, and operation of the worker is ensured.

The invention discloses an omni-directional automatic drill rod ascending and descending device for a coal mine. The device comprises a drill rod box body and a mechanical hand, wherein the drill rodbox body is connected to a guide rail of a drilling machine, an oil cylinder frame is arranged above the drill rod box body, a back plate is connected to the rear side of the oil cylinder frame, a bearing limiting frame is connected in the oil cylinder frame, a guide plate is arranged at the front end of the top of the bearing limiting frame, and the side wall of the guide plate is connected witha vertically-placed pressing rod oil cylinder, a horizontally-placed guiding rod is connected to the guiding plate, the guiding rod is slidably sleeved with a sliding frame, a translation oil cylinderis connected to the top of the sliding frame, a push rod oil cylinder is connected to the inner bottom of the bearing limiting frame, the power output end of the push rod oil cylinder is connected with the mechanical hand, and the drill rod box body is divided into a plurality of drill rod grooves through partition plates. Compared with the prior art, the device has the advantages that that up-down drilling is convenient and use is more convenient.

The invention discloses single-size-fraction coal gangue self-compacting concrete. The single-size-fraction coal gangue self-compacting concrete comprises he following components in parts by weight: 592 to 761 parts of natural aggregate, 85 to 254 parts of coal gangue, 700 to 800 parts of river sand, 100 to 130 parts of fly ash, 400 to 500 parts of cement, 1 to 3 parts of a water reducing agent and 190 to 210 parts of water, wherein the coal gangue is single-size-fraction coal gangue with a particle size ranging from 10 mm to 20 mm. According to the single-size-fraction coal gangue self-compacting concrete provided by the invention, the adopted single-size-fraction coal gangue aggregate is convenient to screen compared with the existing continuous-grade coal gangue aggregate, so preparation cost is greatly reduced; the characteristics of large porosity and strong water absorption of the crushed coal gangue are utilized, and the coal gangue is used as an internal curing material, so the later hydration of the concrete is promoted, and the strength of the concrete is favorably improved; and the coal gangue is used for replacing a part of natural aggregate, so the problem of environmental pollution is effectively solved, the problem of scarcity of natural coarse aggregate in China is overcome, and high economic benefits are achieved.

The invention relates to the technical field of uranium ore hydrometallurgy, in particular to a leaching method of black shale uranium vanadium ore. The leaching method comprises the following steps of crushing and grinding a black shale uranium vanadium ore sample, adding water and sulfuric acid, and uniformly mixing; curing the mixture to obtain a cured material; adding the water or dilute sulfuric acid into the cured material, controlling the volume-to-mass ratio of liquid to solid, adding an iron inhibitor and a neutralizer, adjusting the pH value to 1-3, and carrying out leaching treatment at 80-100 DEG C; enabling the ore pulp obtained after the leaching treatment to be subjected to vacuum filtration, and obtaining leachate and a filter cake; and enabling the filter cake to be subjected to 3-10 sections of countercurrent washing by using the dilute sulfuric acid, and enabling the first section of washing water to be merged into the leachate. According to the method, acid leachingof the black shale type uranium-vanadium ore is achieved, under the condition that the leaching rate of uranium and vanadium is guaranteed, the concentration of residual acid in the leachate is reduced, dissolution of impurity element iron is restrained, and reagent consumption in the subsequent separation and recovery process can be effectively reduced.

The invention discloses a method for protecting a roadway under top-cutting gob-side entry retaining of a coal seam containing dirt band. The method comprises the following steps: finishing roadway arrangement of a working face; mining equipment such as a working hydraulic support and a scraper conveyor is installed in the working face open-off cut; in the mining roadway of the working face, pre-splitting blasting holes and loosening blasting holes are constructed in the top plate along the mining side, explosive is filled, pre-splitting and loosening blasting are conducted on the roadway top plate, and it is guaranteed that blasting construction is not affected by advanced mining-induced pressure; a transshipment crusher and a bottom-dump conveyor are installed behind a working face, a goaf beside a roadway is filled with broken dirt bands mined from the working face, then concrete is used for injection, a pouring gangue wall beside the roadway is formed, and reserving and maintaining of the roadway are completed. An artificial wall body is built in the goaf to support an overlying rock layer, gangue generated by presplitting and loosening blasting is arranged above the artificial wall body, unification of yielding and bearing is achieved, stability of a roadway during the mining influence period is powerfully guaranteed, meanwhile, the goaf is isolated, and threats of gas, spontaneous combustion and the like are avoided.