2658 results about "Crushed stone" patented technology

The invention belongs to the technical field of road construction, and particularly relates to a copper-doped tailing pavement base material as well as a proportion confirmation method and application thereof. The preparation method comprises the following steps: S1, preparing raw materials; s2, a compaction test method is adopted, and the void ratio of the compacted aggregate wrapped with the cement mortar is calculated; s3, according to the volume filling principle, the gravels form a basic framework, the void ratio of the gravels in the compaction state is measured, cement adhesive cement adheres to aggregate, the aggregate is filled in gaps of the framework formed by the gravels, and finally the blending proportion of the copper tailings, the gravels and the aggregate is determined by combining the composition mechanism and volume parameters of the mixture; and S4, calculating the using amount of the steel slag composite cementing material mucilage according to the thickness of the steel slag composite cementing material mucilage wrapping film and the specific surface area of the copper tailings. A skeleton filling theoretical method is adopted, the shrinkage effect of the filler in the skeleton is controlled, the cracking risk is reduced, and meanwhile the high strength is achieved.

The invention provides a finite element-based method for estimating pulling-out ultimate bearing capacity of a grouting screw anchor in gravelly soil, and relates to the technical field of civil structure engineering.A three-dimensional finite element model containing the grouting screw anchor and surrounding gravelly soil is established, model parameters cover the structure and material characteristics of the grouting screw anchor, and the grouting screw anchor and the surrounding gravelly soil are subjected to finite element modeling; a coordinate axis is established with the center of the anchor bottom as an original point for grid division, a stress concentration area is analyzed, principal stress is calculated to serve as critical bearing stress, vertical pull-out loads are applied step by step through a grouting pull-out test, a pull-out stress influence area is determined, soil stress of the area is analyzed, and soil binding power and friction force are calculated. And a grouting coefficient and a rock crack coefficient are generated, soil parameters are corrected, and the ultimate pulling bearing capacity of the grouting screw anchor is comprehensively obtained. According to the method, the pulling ultimate bearing capacity of the grouting screw anchor is accurately evaluated by establishing the three-dimensional finite element model and the graded loading experiment.

The invention provides nano-silicon-based high-strength concrete and a preparation method thereof, and belongs to the technical field of concrete.The concrete is prepared from cement, mineral powder, fly ash, machine-made sand, first-class gravel, second-class gravel, an additive, nano-silicon or a nano-silicon composite modified material and water; the additive is a polycarboxylic acid water reducer and / or a polyether air entraining agent. According to the prepared concrete, the nano silicon material with good dispersity is added, so that the cement consumption can be reduced, the cost can be reduced, and the workability, the strength and the durability can be improved; and the preparation process is simple and convenient, is suitable for large-scale production, and can be widely applied to the engineering fields of high-rise buildings, bridges, tunnels and the like.

The invention relates to a device and a method for simulating influence of underground water seepage on an existing tunnel and a freezing wall, the device comprises a test box body, a tunnel model, a seepage system, a data acquisition monitoring system, a saline water circulation cooling system and a saline water circulation heating system, the test box body is formed by splicing three box bodies with different structures; a formed space area is used for laying a test soil body and a broken stone hardcore; the tunnel model is arranged in the hollow area in the test box body; the seepage system is used for providing an underground water source for simulating seepage; the data acquisition monitoring system is used for monitoring and recording the soil pressure and displacement of the soil body around the tunnel model and the temperature change of the soil body near the freezing pipe; the saline water circulating cooling system is used for providing cooling capacity required by soil body freezing; and the saline water circulation heating system is used for providing heat required for pulling out the freezing pipe. The device can be used for simulating the influence of groundwater seepage on soil deformation and soil pressure around the existing tunnel, adjusting the seepage direction of groundwater and restoring more real groundwater seepage movement.

The invention discloses a broken rock granularity identification method based on machine vision. The method comprises the following steps: S1, obtaining a broken rock pile image in a quarry; s2, based on the lightweight edge segmentation model, combining a deformable convolution module fusing attention and an attention residual shrinkage unit, and replacing a maximum pooling layer with a cavity convolution layer to obtain an improved lightweight edge segmentation model; s3, segmenting the macadam pile image, and distinguishing macadam edges and backgrounds in the macadam pile image to obtain a macadam edge graph; s4, carrying out edge refinement on the broken stone edge graph by adopting a table look-up method, and carrying out area filtering by combining an area filter so as to refine edges and eliminate interference edges; and S5, carrying out macadam edge contour extraction on the macadam edge graph, calculating the area and perimeter of the macadam, and finally obtaining the granularity distribution condition of the macadam. According to the detection method, the calculation amount is remarkably reduced while high accuracy is kept.

The invention discloses lithotripsy equipment and a control method thereof. The lithotripsy equipment comprises a lithotripsy device, an optical tracking device, a display and control device and an ultrasonic imaging device, the lithotripsy device comprises a mechanical arm module, a shock wave module and a control module; the mechanical arm module and the shock wave module are both electrically connected with the control module, and the control module and the optical tracking device are both electrically connected with the display and control device. The ultrasonic imaging device comprises a handheld ultrasonic probe; the handheld ultrasonic probe is in communication connection with the display and control device; the mechanical arm module comprises a mechanical arm, the shock wave module comprises a shock wave generator, and the shock wave generator is arranged at the front end of the mechanical arm; and a plurality of optical reflection markers are arranged on the backs of the handheld ultrasonic probe and the shock wave generator. According to the lithotripsy equipment provided by the embodiment of the invention, the intelligent degree of the extracorporeal shock wave lithotripsy machine is improved, the extracorporeal shock wave lithotripsy treatment process is simplified, and the treatment positioning precision is improved.

The present disclosure provides a crushed stone extraction system, comprising a delivery apparatus and a hydrogel. The hydrogel comprises a first composition and a second composition. The first composition comprises at least one crosslinkable polymer. The second composition comprises at least one crosslinking agent. The crosslinkable polymer is configured to be delivered to a lithotripsy position by the delivery apparatus and then encapsulate the crushed stones. The crosslinking agent is configured to be delivered to the lithotripsy position by the delivery apparatus and then react with the crosslinkable polymer to form an elastic hydrogel body encapsulating the crushed stones. The delivery apparatus is configured to adsorb the elastic hydrogel body and then remove the crushed stones. The present disclosure can remove multiple or even all of the fine crushed stones that cannot be taken out by conventional means at a time, thereby reducing the pain of patients.

The invention relates to a concrete composition, concrete as well as a preparation method and application of the concrete. The concrete composition comprises the following components: coal gangue aggregate, a gel material and a water reducing agent, the coal gangue aggregate comprises crushed coal gangue, a coarse coal gangue material and coal gangue stone powder, and the average particle size of the coarse coal gangue material is larger than that of the coal gangue stone powder and smaller than that of the crushed coal gangue; the gel material comprises slag, gypsum and carbide slag. According to the concrete composition, the coal gangue of different grades is adopted as the aggregate and compounded with the gel material and the water reducing agent to prepare the concrete, all the raw materials have a synergistic effect, the durability, workability, crack resistance and other performance of the concrete are improved, the production cost is reduced, and the requirement of coal mine construction for high-performance concrete is met.

The invention relates to the technical field of cables, and discloses a wear-resistant tensile composite multifunctional mobile high-voltage mining cable which comprises a sheath layer, a protective sleeve is arranged in the sheath layer, a wire is fixedly connected in the protective sleeve, and a buffer assembly is fixedly connected to the outer wall of the sheath layer; through the arrangement of the bidirectional spiral frame, the inner wall of the sheath layer and the bidirectional spiral groove of the middle layer are supported in an embedded mode, and when the sheath layer is damaged by external force, a rigid framework of the spiral frame can immediately block the direct effect of external friction on the inner side protection sleeve; in the scene of puncture of sharp objects such as underground gravel, the staggered grid structure of the spiral frame can effectively disperse the puncture force, and the sharp objects are prevented from deeply invading into the cable through deformation buffering; when the cable is subjected to dynamic bending stress, the bidirectional spiral frame can avoid the risk of internal structure fracture caused by repeated bending, so that the anti-damage capability and the structural stability of the cable under complex working conditions are improved.

The invention relates to the field of pole tower pile foundation protection, and discloses a replaceable pole tower concrete pile foundation protection device which comprises a pole tower pile foundation embedded in underwater sludge; the foundation pit is arranged on the underwater sludge, the depth of the foundation pit reaches the middle position of the tower pile foundation base, and the foundation pit is filled with broken stones to form a broken stone hardcore; the mounting plates are arranged on the pole tower pile foundation; the protection plate is arranged on the mounting plate and is rotatably arranged on the mounting plate; and the protection plates can automatically rotate according to the strength and direction of water flow, and are matched with the anchoring effect of the inserting rods, so that the gravel hardcore is effectively stabilized, the gravel layer is prevented from being lost, and the stability and anti-scouring capacity of the pile foundation are further enhanced. Through the design of the clearing rod, sediments on the outer wall of the tower pile foundation can be regularly cleared away, unsmooth water flow or uneven scouring caused by sediment accumulation is avoided, and the situation that the service life of the pile foundation is shortened due to biological corrosion is prevented. And through the effective sliding and scraping effects of the removing rod, the corrosion influence of attachments on the pile foundation can be reduced, and smooth water flow is ensured.

To provide a deep well filtering structure that effectively prevents the subsidence and collapse of the well wall. [Solution] The deep well filtration structure of this invention includes a surface loess layer 1 and a well channel 7, with a concrete well side 8 poured onto the surface of the surface loess layer, a reinforced concrete permeable pipe and a reinforced concrete solid pipe 10 installed in sequence inside the well channel, a well pipe pallet 6 placed at the bottom end of the well channel, and below the surface loess layer, in sequence, a gravel-mixed loess layer 2, a gravel layer 3, a crushed stone-mixed loess layer 4 and an underground loess layer 5, and a clay ball-filled sealing layer 9 filled between the surface loess layer, the gravel-mixed loess layer and the reinforced concrete solid pipe.

The invention provides a surrounding rock back break monitoring and early warning system for a curved tunnel, which relates to the technical field of curved tunnel excavation monitoring and comprises an acquisition module, a tunnel model construction module, a back break analysis module and an evaluation module, the collecting module is used for obtaining the position of a pre-buried blasting point of each area, the preset blasting strength and tunnel inner wall surrounding rock damage data in the blasting excavation process, and the tunnel model building module is used for building a bent tunnel blasting AI analysis model. A blasting impact strength data set, a blasting gravel impact strength data set and a surrounding rock surface strength data set are established, and the over-excavation and under-excavation analysis module is used for constructing a blasting impact influence coefficient Cb, i, a blasting secondary impact influence coefficient Cimpact, i and a surrounding rock surface strength excavation influence coefficient Kh, i of the ith area. According to the system, the collision of the inner wall of the curved tunnel is detected and analyzed twice, the over-excavation and under-excavation conditions are further detected and evaluated, and a corresponding strategy is generated.

The utility model relates to the technical field of macadam paving for municipal road construction, and discloses a macadam paving device for municipal road construction, which comprises a support frame and a paving mechanism, the paving mechanism comprises a pouring frame and a scraper blade, the left side of the pouring frame is fixedly provided with a filter grating, and the left side of the pouring frame is fixedly provided with a motor; mounting plates are fixedly mounted on the front side and the reverse side of the left end of a material pouring frame correspondingly, through the arranged paving mechanism, gravel slides down along the material pouring frame, large gravel can be intercepted by a filtering grid, and the problem that paving is uneven due to the fact that the large gravel falls on the road surface is avoided; a worker can clean broken stones blocked on a filtering grid in real time by sticking the worker on a standing operation frame, the height between a scraper and the ground can be adjusted by adjusting stretching and retracting of a spring in a telescopic groove, the broken stones can be conveniently paved with different thicknesses, redundant broken stones can be pushed to the two sides through a V-shaped stone scattering plate, and the broken stones can be conveniently spread. Redundant gravel is prevented from being accumulated in the middle, and the flexibility of gravel paving is improved.

The utility model relates to the technical field of hydraulic engineering construction machinery, and discloses a canal trench ditching device, which comprises a chassis structure, a trench digging mechanism, a trench digging mechanism, a trench digging mechanism, a trench digging mechanism, a trench digging mechanism and a trench digging mechanism, wherein the chassis structure is used for realizing operation on soft and hard alternate soil layers or undulating surfaces; the rotary tillage structure is mounted at the bottom of the chassis structure and used for crushing hard soil on the surface layer and removing weeds and broken stones to form a uniform and loose plough layer; the ditching structure is mounted at the bottom of the chassis structure, is positioned behind the rotary tillage structure and is used for realizing excavation of grooves with different depths; and the tamping structure is installed at the bottom of the chassis structure and located behind the ditching structure, comprises a soil shifting shovel for leveling soil discharged from the two sides of the ditching structure, and tamps the bottom of the groove and the side slope through vibration compaction of a plane tamping plate and a slope tamping plate. By integrating the self-adaptive terrain adjusting system and the combined type grooving mechanism, topographic relief and soil states can be monitored in real time, the ditching depth, gradient and section form can be dynamically adjusted, and one-time forming of a groove is ensured.

This invention relates to a construction method for driving piles using a vibratory driven pile unit. The original walking pile frame is replaced with a crawler crane. Utilizing the flexible movement of the crawler crane, the machine can move immediately after driving one pile to drive the next. At this time, crushed stone can be added to the previous pile, and then the pile can be extracted. This back-and-forth operation greatly improves construction efficiency. The crawler crane is equipped with an adjustment frame, which is fixed at the bottom by a bottom-fixing cylinder. The mast adjusts the upper position of the pile frame, and the adjustment frame adjusts the lower position of the pile frame, ensuring the verticality of the crushed stone piles during driving and extraction. During use, the mast adjusts the position of the pile frame, and the vibratory lifting mechanism drives the hoisting rope to move the vibratory hammer up and down through the slide frame for driving or extracting piles.

To provide a crusher capable of controlling an object to be crushed in a crushing chamber to be in a constantly filling state by reducing the rotation speed of the crushing chamber when a filling rate of the object in the crushing chamber is low.SOLUTION: A crusher 1 for crushing stones by rotating a crushing unit comprises: a sensor 50 that measures a raw stone 2 thrown into a crushing chamber 11b; a crushing state determination unit 42 that determines a filling stage of the raw stone 2 in the crushing chamber 11b on the basis of measurement information of the measured raw stone 2; and a control unit 40 that controls an IP motor 20 so as to reduce the rotation speed of the crushing unit when it is determined that the filling state of the raw stone 2 is an unfilling state.SELECTED DRAWING: Figure 1

The invention discloses a large-scale planting rotary tillage fertilizer applicator, and relates to the technical field of agricultural tools, the large-scale planting rotary tillage fertilizer applicator comprises a rack, a transmission box is mounted at the upper end of the rack, transmission shafts are mounted at two ends of the transmission box, protection plates are mounted at two ends of the rack, and a driving shaft is rotatably mounted between the two protection plates; a plurality of rotary tillage blades are detachably mounted on the surface of the driving shaft, a stone crushing box is mounted at the lower end of the rack in front of the driving shaft, a partition plate is mounted in the stone crushing box, a crushing assembly is mounted between the partition plate and the stone crushing box, a plurality of arc-shaped sieve plates are mounted at the front end of the partition plate at equal intervals, and a stirring assembly is mounted in the stone crushing box above the arc-shaped sieve plates. Soil is turned over for the first time by arranging the soil turning roller, stone blocks are stirred into the stone crushing box through the arc-shaped sieve plate by using the stirring assembly, the two stone crushing rollers in the stone crushing box crush the stone blocks, the crushed stone blocks fall on the soil to change the soil structure, and the situation that the rotary tillage blades are abraded by large stone blocks is avoided.

The invention discloses a broken stone screening device for a loader, and relates to the technical field of screening equipment, the broken stone screening device comprises a bucket connected to a lifting arm of the loader and a screen drum communicated to the back of the bucket and used for material separation, and screen holes used for filtering materials are formed in the half circumferential surface, close to the bottom of the bucket, of the screen drum; reinforcing frames are fixed to the inner side of the screen drum at equal intervals. According to the broken stone screening device for the loading machine, the loading machine drives an opening of the bucket to rotate upwards, materials are guided into a channel between the screen drum and the rotary drum, meanwhile, the driving mechanism drives the stone inlets which are distributed in a staggered and equal-included-angle mode through the rotary drum to scrape broken stones, and the materials can be conveniently screened from multiple channels; when the dispersing frame at the front end of the middle shaft rod and the material stirring rod at the tail end of the middle shaft rod move in the wave-shaped fluctuation cavity, the dispersing mechanism can disperse shoveled or extruded materials in a reciprocating mode through reciprocating fluctuation, and it is ensured that the device can efficiently screen clustered materials and broken stones.

The invention relates to the technical field of bridge pavement, in particular to a concrete bridge anti-crack bridge deck pavement structure and a pavement method. A high-elasticity modified asphalt mastic macadam concrete upper surface layer, a fiber non-wheel-sticking emulsified asphalt bonding layer, a fiber high-strength dense water asphalt concrete lower surface layer, a fiber non-wheel-sticking emulsified asphalt bonding layer, a high-toughness asphalt sand stress absorbing layer, a fiber waterborne epoxy anti-cracking waterproof bonding layer and a C50 fiber concrete anti-freezing and anti-cracking layer are sequentially arranged from top to bottom. The durability of the bridge deck pavement structure is improved, and the problem that the service life of the bridge deck pavement structure is short is solved.

The utility model relates to a stone crushing device which comprises a stone crusher, and the stone crusher is provided with a stone inlet and a broken stone outlet. A discharging opening is formed in the lower end of the storage bin, the discharging end of the vibration feeding machine is aligned with the stone inlet, the feeding end of the feeding belt is located below the broken stone outlet, the discharging end of the feeding belt is located above the storage bin, the feeding belt is obliquely arranged, and the feeding end of the feeding belt is low, and the discharging end of the feeding belt is high. When the stone crusher is used, stones are put into the vibration feeding machine to be conveyed to the stone inlet of the stone crusher, the stones are crushed into broken stones by the stone crusher and then are output to the feeding belt from the broken stone outlet, the broken stones are conveyed into the storage bin by the feeding belt to be stored, and the broken stones are output through the discharging opening when needing to be used. The first purpose of the stone crushing device is to provide the stone crushing device which can conveniently feed and discharge materials into the bin, and the problem that an existing stone crushing device is strenuous in feeding and discharging is solved.

The invention discloses a civil engineering rock-soil strength detection device, and relates to the technical field of civil engineering rock detection. The upper end of the supporting frame is fixedly connected with a detection cylinder, the output end of the detection cylinder penetrates through the upper side wall of the supporting frame and is connected with a strength detection mechanism, the strength detection mechanism is provided with a sealing mechanism, the upper side wall of the treatment box is provided with a detection inlet, and the inner wall of the lower side of the treatment box is fixedly connected with a detection limiting frame. A sweeping mechanism is arranged on the left side of the lifting plate, and a dustproof mechanism is arranged on the outer side of the detection limiting frame. The lower end of the sealing plate is always attached to the upper end face of the treatment box under the action of the abutting spring. Meanwhile, the lower end of a detection limiting frame extends to the inner side of the treatment box, and a good protection effect is achieved through cooperation of a strength detection pressing plate and the detection limiting frame, so that damage to operators caused by broken stone splashing in the detection process is avoided, and the safety of the device during use is greatly improved; and the cleaning mechanism is arranged to realize the automatic cleaning function of the device.

The utility model discloses a stone screening device for a stone crusher, and relates to the technical field of stone crushers. The device comprises a rack, a screening box is arranged above the rack; the opposite side walls of the screening box are connected with the rack through springs correspondingly. A plurality of vibration motors are connected to the bottom of the screening box side by side. A pair of rotating shafts is rotationally connected between the opposite side walls of the screening box side by side. Sieve plates are radially fixed on the two rotating shafts; a plurality of sieve holes are formed in one surface of each sieve plate side by side; the two rotating shafts are connected through a rotating driving assembly; the rotary driving assembly is used for turning over the two sieve plates by driving the two rotary shafts to rotate. The sieve plate cleaning device is reasonable in structural design and convenient to use, and the cleaning efficiency of broken stones clamped on the sieve plate is effectively improved.

The invention belongs to the technical field of foundation treatment construction, and particularly relates to a rapid reinforcement construction method for a deep ultra-soft foundation. Comprising the following steps: step 1, in-situ sludge solidification; 2, leveling and partitioning are carried out; 3, construction of the cutoff wall; 4, well point dewatering; 5, high-pressure jet grouting reinforcement is conducted; 6, a geogrid reinforced broken stone hardcore is laid; and 7, leveling and rolling. According to the method, the three key steps of sludge in-situ solidification, well-point dewatering and high-pressure jet grouting pile construction are combined, the construction period is effectively shortened, the construction cost is reduced, the environmental protection property is good, the bearing capacity of the foundation can be remarkably improved, the stability and safety of a building are ensured, and an innovative solution is provided for reinforcement treatment of the ultra-soft soil foundation.

The invention discloses a big data-based mine blasting process control optimization method and system, and relates to the technical field of mine blasting. Constructing a three-dimensional twinborn model of the mine, obtaining a plurality of blasting points and effective blasting areas thereof, obtaining drilling lithology information and effective blasting areas of the blasting points, constructing a charge evaluation model in combination with historical blasting parameters, and obtaining expected charge by utilizing the charge evaluation model in combination with first blasting parameters; the broken stone throwing duration of each effective blasting area is obtained, a detonation evaluation model is constructed in combination with the drilling lithology information and the historical blasting parameters, the detonation evaluation model is used for obtaining the expected detonation time difference in combination with the second blasting parameters, and recommended blasting parameters are generated according to the expected explosive loading amount and the expected detonation time difference and fed back; the corresponding expected explosive loading amount can be output according to the expected blasting area, and the explosive loading efficiency of mine blasting operation and the overall blasting effect are improved.

The invention discloses a non-autoclaved prestressed concrete pipe pile and a preparation method thereof, and relates to the field of fish culture. According to the autoclave-free prestressed concrete pipe pile and the pipe pile preparation method, through collaborative innovation of a material system and process design, comprehensive breakthrough is achieved in the aspects of mechanical properties, environmental protection benefits and environmental adaptability; in the aspect of technical performance, the hydration activity in a low-temperature environment is remarkably improved due to introduction of the phosphorus slag and the composite exciting agent in the cementing material, so that the compressive strength of the pipe pile in 28 days in the environment of-20 DEG C reaches 95% or above of a standard value (embodiment 3: 98.0 MPa), and meanwhile, the compactness of concrete is improved by 20% or above due to optimal grading of the nickel ore slag sand and the two-graded broken stone; after 300 times of freezing and thawing cycles, the mass loss is only 2.8% (embodiment 1), the chloride ion permeability coefficient is as low as 1.4 * 10 <-12 > m < 2 > / s, and the anti-permeability and durability are obviously superior to those of a traditional autoclaved pipe pile (contrast experiment: freezing and thawing loss rate reaches 46%).

The invention relates to the technical field of pumped storage power stations, in particular to a pumped storage power station tunnel construction surrounding rock deformation safety control method which comprises the steps that firstly, a half side with the relatively low tendency is excavated, and an inclined rock stratum of the half side with the relatively high tendency is made to conduct creep displacement towards an excavated tunnel area; and then the half side with the relatively high tendency is constructed, so that the creep quantity of the half side in the later period can be reduced. The construction position of the half-side tunnel with the relatively high inclination is larger than the expected position of the tunnel, the excavated rock stratum is supported through the pipe shed pipe before excavation, and the inclined rock stratum can be prevented from sliding towards the excavated tunnel area under the action of the gravity of the inclined rock stratum through the supporting effect of the steel arch frame and the bottom plate steel frame in cooperation with the supporting effect of the steel arch frame and the bottom plate steel frame. According to the half-side tunnel with the relatively high inclination, the space between the steel arch and the second-layer steel arch is filled with broken stones to form a broken stone filling layer serving as a buffering layer of inclined rock layer creep deformation, and the influence of the creep deformation on the inner-layer steel arch is reduced. The method is particularly suitable for the conditions that the tunnel section is small and the deformation of the inclined rock stratum is relatively large under the influence of bias pressure, construction is easy, and popularization is facilitated.

The invention provides a non-explosion excavation construction method based on ultrahigh pressure water jet cutting, which comprises a mobile platform, the mobile platform is provided with a water jet mechanical arm, a wet spraying mechanical arm, an arch anchor mechanical arm and an auxiliary frame arch arm, and the lower part of a lower layer frame body of the mobile platform is hollowed out and is provided with a movable tunneling slag-raking machine; the tunneling crawler loader is provided with a splitting drill mechanical arm or a breaking hammer mechanical arm; planning the arrangement position of a slag discharge hole, the movement track of a jet flow module, jet flow parameters and the arrangement of a splitting hole; the arch anchor mechanical arm moves forwards, and drilling operation of a slag discharging hole is conducted; the water jet cutter mechanical arm moves forwards and cuts the contour line with the slag discharging hole as the starting point; the tunneling slagging-off machine synchronously carries out excavation operation in the passing space, and gravels and muck are conveyed to the rear portion to be discharged; after the single-cycle operation is finished, the movable platform and the tunneling crawler loader move forwards, the wet spraying mechanical arm and the auxiliary frame arch arm carry out arch erecting, net hanging and primary spraying operation, and the non-blasting excavation problem under the sensitive geological conditions of superhard rock, high ground stress and the like is solved.

A vertical shaft construction slag sliding well bottom rock ballast gathering and protecting device comprises a supporting structure, an upper fence and a sliding groove structure are sequentially arranged on the supporting structure from top to bottom through a traction structure, and a lower fence is arranged on the lower portion of the sliding groove structure. The lower fence and the sliding groove structure are driven through a linkage structure. When the lower fence is unfolded, the sliding groove structure is folded; when the lower fence is folded, the sliding groove structure is unfolded. According to the stone slag gathering and protecting device at the bottom of the slag slipping well for vertical shaft construction, stone slag falling to the bottom of a vertical shaft can be effectively gathered; meanwhile, in the bottom deslagging operation process, the device can stop rock ballast falling from the upper portion.

The utility model relates to a constructional engineering sand screening device which comprises a mounting frame, the top of the mounting frame is provided with a self-cleaning sand screening structure, the sand screening structure comprises an overturning frame rotationally mounted in the mounting frame, and four elastic supporting assemblies are arranged in the overturning frame. A vibrating frame is fixedly mounted at the tops of the four elastic supporting assemblies, a screen is fixedly mounted on the inner side of the vibrating frame, and a connecting rod is fixedly mounted at the bottom of the vibrating frame. According to the sand screening device for constructional engineering, the vibration motor operates to drive the vibration frame and the screen mesh to vibrate through the connecting lever, sand is poured on the top of the screen mesh and then screened, and when too many broken stones are clamped on the screen mesh, the direct current motor drives the overturning frame to rotate, so that the screen mesh faces downwards; and then the vibration motor continues to operate to drive the vibration frame and the screen to vibrate, so that the broken stones can be shaken off, and the effect of automatically cleaning the blocked sand and stones is achieved.

The invention belongs to the technical field of mining engineering, and particularly discloses a broken stone conveying device for mining engineering, which comprises a screw conveyor, a blanking bin is arranged above the front end of the screw conveyor, a bracket is mounted below the front end of the screw conveyor, and a driving mechanism is mounted on the surface of the bracket. The device comprises a discharging bin, a turnover mechanism is arranged in the discharging bin, a lifting mechanism is arranged below the turnover mechanism, a positioning block is fixedly installed on the surface of the discharging bin, a cylindrical rod is slidably installed in the positioning block, and a matching rod is fixedly installed at the top of the cylindrical rod. The lifting mechanism and the overturning mechanism are arranged in the discharging bin, the overturning mechanism can discharge large stones and prevent the large stones from falling into the spiral conveyor, the lifting mechanism can play a buffering role, impact force generated when materials fall can be effectively absorbed, vibration and friction of the conveying belt are reduced, and the conveying efficiency is improved. Therefore, the service life of the conveying belt is prolonged.