275results about "Open-pit mining" patented technology

The invention discloses a vehicle weighing method and device, a mine car and a storage medium, and the method comprises the steps: judging whether a vehicle is in a no-load state or not according to the current reduced load capacity of the vehicle after detecting that the vehicle triggers a lifting action; if the vehicle is in the no-load state, whether the vehicle meets the no-load calibration condition or not is judged according to the power-on state, the vehicle speed and the whole vehicle inclination corresponding to the vehicle; and if the vehicle meets the no-load calibration condition, the current weight of the vehicle is calibrated as the no-load weight. According to the technical scheme of the embodiment of the invention, weighing errors caused by the fact that cargos are not poured completely in the vehicle can be avoided, and the accuracy of vehicle weighing results is improved.

The invention relates to the technical field of blasting charging devices, in particular to a surface mine pre-splitting blasting parameter design method which comprises the following steps: acquiring P-wave velocity and differentially constructing a stiffness sequence, mapping a hole depth axis to identify a sudden change area, monitoring displacement and crack rate to extract triaxial deformation, identifying an unstable rock section and setting a charging section. According to the method, the P-wave speed is obtained, differential processing is carried out on the P-wave speed, the P-wave speed is converted into the rigidity gradient change rate, the rigidity gradient change rate is mapped to a hole depth axis recognition sudden change area, crack propagation and hole wall displacement are monitored, and an unstable rock stratum is positioned; and three-axis deformation is extracted to enhance prediction precision, a charging section is set, the dosage is calculated, the energy release efficiency is optimized, and blasting interference optimization is carried out by combining the time delay difference and the inter-hole included angle division distance.

The invention discloses an open pit mine stripping semi-continuous laying method based on a backfill type deeply-buried channel, and belongs to the technical field of transportation of open pit coal mine stripping systems. The method specifically comprises the steps that an optimal stripping semi-continuous belt conveyor system layout route starting from a stripping crushing station to an outer dumping site is planned; a space gully between the inner dumping site and the outer dumping site of the optimal route is filled with stripping materials to form a dumping bridge, a stripping semi-continuous belt conveyor is laid on the dumping bridge to the outer dumping site, and a backfill type deeply-buried channel is laid below the dumping bridge in advance. According to the transportation mode, the stripping and coal mining operation route is optimized, the truck transportation distance is shortened, and the comprehensive cost is reduced by 50%. Meanwhile, the dumping space is enlarged, and the tension of the dumping space is relieved. According to the arrangement mode, stripping and coal mining transportation routes are optimized, existing coal transportation and power transmission lines are reserved, and rerouting is avoided; tail gas emission is reduced, and environmental protection and energy conservation are achieved; hidden safety accidents in truck transportation are reduced, and manpower is released; and the strip mine is promoted to develop towards a safe, green, intelligent and efficient direction.

The invention discloses an open-pit coal mine thin coal seam mining technology, and relates to the field of open-pit coal mine mining, and the technology comprises the following components: resource depth exploration and coal seam high precision modeling, coal and rock layer precise blasting, coal and rock layer layering, loosening and stripping treatment, and thin coal seam stockpiling and screening according to a heat value and classification intelligent scheduling precise loading and transportation. According to the method, accurate modeling is conducted on the thin coal seam through three-dimensional modeling software, the model is updated in combination with real-time data feedback, accurate mastering of dynamic changes of the coal seam is achieved, meanwhile, through collaborative operation of accurate blasting of the coal seam and the rock stratum and layered loosening and stripping treatment, the mixing degree of the coal seam and the rock stratum is effectively reduced, and the quality of raw coal is remarkably improved; and subsequently, the thin coal seams are stockpiled and screened according to heat values, and precise loading and transportation are realized in combination with a classified intelligent scheduling system, so that the transportation efficiency and the resource utilization efficiency are greatly improved, the resource waste is fundamentally reduced, and an efficient and precise technical scheme is provided for open pit coal mine thin coal seam mining.

The invention relates to a milling device (20), in particular for a soil milling machine (10). The milling device comprises a rotatable milling drum (22) mounted in a milling drum housing (21) with a rotation axis (23) extending transversely to the working direction (a) of the milling device (20). Furthermore, the milling device (20) comprises a spray device (30) for spraying a substrate (U) to be milled with coolant.The spray device (30) comprises at least two spray bars (31) arranged in the milling drum (22), which can be connected to a coolant supply line (34) that is static relative to the milling drum (22) via a central rotary feedthrough (33) by means of separate lines (32), depending on the rotational position of the spray bars (31) relative to the coolant supply line (34), and can be disconnected from the coolant supply line (34) to interrupt the coolant supply, depending on the rotational position of the spray bars (31) relative to the coolant supply line (34).

The invention discloses a rock-fill dam-level burdening blasting mining method, system and device and a medium. The method comprises the following steps that firstly, blasting parameters are intelligently designed; step 2, dynamically controlling the drilling precision; 3, implementing a coupling charging structure; step 4, accurately detonating the electronic detonator; step 5, grading online detection after explosion; and 6, blasting vibration is monitored and fed back in real time. According to the method, a blasting parameter mathematical model is constructed, multiple parameters and constraint conditions are integrated, accurate parameters are output, and secondary machining of stone is reduced; a distributed optical fiber sensing network is arranged, and fine control over blasting vibration is achieved; an unmanned aerial vehicle is used for scanning a muck pile, a compensation scheme is automatically generated, the loading and transporting efficiency is improved, meanwhile, a multi-parameter coupling model is established, a dynamic adjustment scheme is monitored and fed back in real time, the management fragmentation problem is solved, and multiple measures are adopted to improve the accuracy and safety of blasting mining.

A green, safe and efficient mining device for a mine is provided. The device includes a support frame, a crushing bin, a fixed jaw plate, a movable jaw plate, a cam roller, a movable jaw back plate, first springs and a driving device. The support frame is provided with an opening, the crushing bin is installed on the support frame; the fixed jaw plate is vertically installed on a left side of an inside of the crushing bin, the movable jaw back plate is installed at one side of the movable jaw plate; a top end of the movable jaw plate is hinged to a right side of the crushing bin, the cam roller is rotatably connected with the inside of the crushing bin and is slidably connected with the movable jaw back plate.

The invention discloses a dual-mode control switching method for unattended reconstruction of a rotary drilling rig, and particularly relates to the technical field of mechanical equipment mode switching, and the method specifically comprises the steps of S1, switching request triggering and instruction freezing, S2, full-state snapshot generation and synchronization, S3, three-level progressive arbitration decision, and S4, dual-factor verification and switching execution. And S5, network fluctuation fault tolerance. According to the invention, through overall planning of the vehicle-mounted controller, after a switching request is received, an instruction is frozen, full-state snapshots including sensor data, operation links, equipment health and environment data are synchronized, and switching is completed through three-level arbitration including safety state judgment, authority network verification and target end confirmation and then double-factor recheck. Safe seamless switching between a remote mode and a local mode can be achieved, the situations of instruction conflicts and information faults are avoided, the operation efficiency is improved, fault-tolerant processing is carried out on scenes such as network fluctuation and emergency takeover, and the reliability and safety of unattended operation are further improved.

The present invention relates to an open-pit mining machine, belonging to the technical field of mining machines. It includes a mining machine body, a cutting drum, a scraper plate, a scraper conveyor and a belt conveyor. Two groups of front crawlers are respectively fixedly connected to the front side of the mining machine body through two groups of front drive frames. The cutting drum is rotatably connected to the lower end of the front side of the mining machine body. An engine compartment is fixedly connected to the front side of the mining machine body and above the cutting drum. By setting the combination of mechanical fixing parts and permanent magnet magnetic seats, the present invention adopts a double fixing method of mechanical and non-mechanical to firmly fix the pick cutter. This fixing method not only avoids the common wear and loosening problems in traditional mechanisms, but also overcomes the possible failure risks of non-mechanical fixing methods, thus comprehensively improving the stability of the pick cutter. By setting a crushing device, the situation of uneven ore particle size is effectively solved, which is convenient for the subsequent processing of ore materials.

The invention provides a rock mining method, and belongs to the field of rock mining. Comprising the following steps that S100, a soil layer is cleared and transported, the soil layer covered by a rock stratum is cleared and transported, and a protection device is arranged; step S200, performing carbon dioxide phase change fracturing crushing: performing carbon dioxide phase change fracturing crushing on the rock according to a first rule to form a plurality of phase change fracturing steps, and performing carbon dioxide phase change fracturing crushing on the plurality of phase change fracturing steps according to a second rule; s300, rock clearing and transporting, wherein the crushed rock is cleared and transported; and S400, rock mining is completed. The rock mining method aims at solving the problems that in the prior art, a rock mining method is low in mining efficiency and poor in safety. The device has the technical effects that the safety is guaranteed while the mining efficiency is improved while excessive mining and waste of rocks are avoided.

The invention discloses an accurate control blasting construction method for a high and steep slope of a surface mine, and relates to the field of blasting operation. The accurate control blasting construction method for the high and steep slope of the surface mine is outstanding in safety benefit, and the long-term stability of the slope is greatly improved by forming the high-quality flat slope, so that the risks of landslide and rockfall are fundamentally reduced, and the safety of personnel and equipment below is guaranteed; the economic benefit is remarkable, overexcavation and underexcavation of the side slope are reduced, the stripping amount is close to a design value, the cost is saved, a steeper slope angle can be adopted for stabilizing the side slope, the total rock stripping amount is reduced, recoverable resources are increased, and the service life of a mine is prolonged; the technical benefit is obvious, the half-hole rate is improved, the surrounding rock damage and blasting vibration are reduced, and a better foundation is provided for slope supporting operation such as follow-up anchor rod and anchor cable installation; environmental and operation benefits are improved, environmental damage caused by slope instability is reduced, drainage system arrangement and daily safety inspection are better facilitated through slope leveling, and long-term maintenance cost is reduced.

The invention relates to the technical field of open-pit tailing mining, in particular to a propelling arm device for an open-pit mine environment. The device comprises a plurality of sections of propelling arms, any section of propelling arm comprises a box body, the box body is a cuboid, two spiral bodies with opposite spiral directions are arranged in the box body in parallel, and a conical head and a conical hole are formed in the two ends of each spiral body respectively and used for butt joint positioning and fixing of the adjacent sections of propelling arms; the spiral body hanging bearing seat is used for hanging one end of the spiral body in the box body, and the other end of the spiral body is open; the box body connecting mechanism and the box body connecting tongue plate are arranged at the two ends of the box body and used for achieving mechanical connection of the adjacent sections of propelling arms; the spiral body connecting mechanism is used for connecting the spiral bodies of the adjacent sections of propelling arms, so that power transmission is realized and the coaxiality is ensured; armor cable grooves are formed in the two sides of the upper surface of the box body and used for fixing armored cables. The lower surface of the box body is of a plane structure. The problem that open-air tailing end slope coal pressing cannot be effectively and safely mined is solved.

The invention discloses a layout method of a coal mining continuous system based on a backfill type deeply-buried channel, and relates to the technical field of strip mine coal mining transportation systems. Firstly, raw coal transportation is conducted through an original rock section inclined roadway, and an inner dumping site is formed along with advancing of a working face; secondly, a backfill type deeply-buried channel is formed in the pit bottom, a belt conveyor is arranged in the backfill type deeply-buried channel to be communicated with a belt conveyor arranged in the inclined roadway, and raw coal under the pit is conveyed to a ground surface production system; the continuous mining and transportation process is combined with the backfill type deeply-buried channel, the coal mining transportation route is optimized, and the comprehensive cost is reduced; the backfill type deeply-buried channel is utilized, the inner drainage space is fully utilized, resource waste is reduced, and the utilization rate of the inner drainage space is increased; tail gas emission is reduced, and an efficient, low-consumption and environment-friendly transportation mode is achieved; manpower is released, and hidden safety accidents in truck transportation are reduced.

The utility model relates to a metal surface mine large dip angle belt conveyor transportation system which comprises a coarse crushing station system, a first transfer station, a second transfer station and a third transfer station. The first transfer station is connected with the second transfer station through a belt conveyor, and the second transfer station is connected with the third transfer station through a large-dip-angle belt conveyor; the inclination angle of the large-inclination-angle belt conveyor is larger than 15 degrees and smaller than 35 degrees. Compared with the prior art, the large-dip-angle belt conveyor has the advantages that by applying the large-dip-angle belt conveyor technology, the capital construction investment of a mine can be greatly reduced; the capital construction time is shortened, the metal surface mine deep mining transportation distance is shortened, and the mine transportation cost is saved; and meanwhile, the routing length is shortened through the routing arrangement of the large-dip-angle belt conveyor, side slopes under unfavorable geological conditions are effectively avoided, and the safety and reliability of the system are improved.

The invention provides a filling method for an open pit coal mine goaf, and relates to the technical field of goaf filling, and the filling method comprises the following steps: sequentially forming an untreated area, a filling area and a completion area along the direction from the goaf to a non-goaf, and when the filling operation is propelled and transferred along the direction from the non-goaf to the goaf, converting the filling area into a new completion area, the untreated area is converted into a new filling area, and the new untreated area is formed at the end, away from the non-goaf, of the new filling area; wherein a plurality of first filling holes which are distributed at intervals are formed in the untreated area, and first filling slurry formed by mixing first solid aggregate and first liquid slurry according to a first preset proportion is filled into the plurality of first filling holes in the filling area. According to the filling method for the open pit coal mine goaf, high-efficiency and high-quality filling of the goaf is achieved, and then safe operation of the open pit coal mine is guaranteed.

The invention discloses an intelligent bench blasting method and system for a rock-mud staggered surface mine, and relates to the technical field of blasting, the method comprises the following steps: acquiring point cloud data of a bench blasting area of the surface mine through three-dimensional laser scanning; constructing a three-dimensional geologic model reflecting the step form and the rock mud distribution characteristics; based on bench blasting characteristics, a comprehensive blasting prediction model is established; constructing a multi-objective optimization function including flying stone control, vibration control and lumpiness uniformity; processing the multi-objective optimization function through a multi-objective optimization algorithm to determine reference hole net parameters, single-hole explosive quantity and millisecond delay of bench blasting; and according to the local rock mud distribution, carrying out self-adaptive adjustment on the reference hole net parameters, the single-hole dosage and the differential delay. According to the method, through three-dimensional geological modeling, multi-target parameter optimization and blasting parameter self-adaptive adjustment, the blasting problem under the rock-mud staggered geological condition is solved.

The utility model provides an auxiliary crushing device of exposed ore mining equipment, which comprises a single-tooth roller crusher and a crushing claw mechanism, and the crushing claw mechanism is rotatably arranged at the end part of a crawler walking device through a swinging oil cylinder and is used for impacting, crushing, cutting and rolling large mineral aggregates; the single-tooth-roller crusher is installed on a mineral aggregate continuous conveying channel of the exposed ore mining equipment in a crossing mode and used for extruding and crushing continuously conveyed mineral aggregates. The auxiliary crushing device of the exposed ore mining equipment can actively crush mineral aggregates continuously mined in a strip mine in advance, prevents large mineral aggregates from blocking a subsequent conveying system, and improves the mineral aggregate collecting capacity and efficiency.

The invention relates to an open-pit mine blasting method for efficiently separating ores and waste rocks, which comprises the following specific steps: S1, carrying out geological exploration on a blasting area of an open-pit mine, and measuring physical and mechanical parameters; s2, establishing a blasting model, and determining a preliminary blasting scheme according to a simulation result; s3, according to the preliminary blasting scheme, on-site hole arrangement, drilling, charging, blasting and shovel loading are carried out on the blasting mining step of the strip mine; and S4, the blasting effect is monitored in real time in an omnibearing mode, a blasting scheme is optimized according to feedback, special wedge-shaped blast holes are formed, the physical and mechanical property difference of the ore and the waste rock is fully utilized, in the blasting stress wave action process, wedge-shaped body parts of the adjacent wedge-shaped blast holes are connected along a contact zone of the ore body and the waste rock to form a cleavage, and the wedge-shaped body parts of the adjacent wedge-shaped blast holes are separated from the cleavage. The ore and the barren rock are separated, the ore and the barren rock are exploded at the same time and are not mixed with each other, the mining purity of the ore is greatly improved, and the ore dressing cost and resource waste caused by mixing of the barren rock are remarkably reduced.

The utility model relates to the technical field of open pit coal mining, in particular to a dust removal device for open pit coal mining, which comprises a bottom frame, the upper end of the bottom frame is fixedly connected with a U-shaped sun shield through a support rod, a cooling-water machine is mounted in the bottom frame, and the outer wall of the cooling-water machine is communicated with a drainage pipe. The outer wall of the drainage pipe communicates with two vertical pipes which are distributed left and right, the other ends of the two vertical pipes penetrate through the sun shield and communicate with flow guide pipes, and a plurality of evenly-distributed atomizing nozzles are installed on the opposite faces of the two flow guide pipes; cold water in the cooling-water machine is drained to the atomization spray head through the drainage pipe and the flow guide pipe to be sprayed out through the water pump, normal-temperature water is cooled into low-temperature ice water through the cooling-water machine, the water mist evaporation speed can be preliminarily reduced, the atomization spray head can be shielded through the sun shield, and the situation that the temperature of the spray head rises due to sun exposure is prevented; and the water mist evaporation speed is further reduced.

The invention relates to the technical field of mining machines, in particular to a shoveling and transporting device and a mining machine. The shoveling and conveying device comprises a shoveling plate part, a belt conveyor and a belt tensioning mechanism, the shoveling plate part is movably installed on the frame, and the shoveling plate part is provided with a first position and a second position; when the shovel plate part is located at the first position, the bottom of the shovel plate part is contacted with the working surface; when the shovel plate part is located at the second position, the bottom of the shovel plate part is located above the working face and leaves the working face; the belt conveyor is installed on the frame, and the shovel plate part is installed at the first end of the belt conveyor. The belt tensioning mechanism is installed on the frame body and used for adjusting the corresponding tensioning degrees of the two sides of a belt located on the belt conveyor. According to the shoveling and conveying device, due to the fact that the belt tensioning mechanism capable of adjusting the corresponding tensioning degrees of the two sides of the belt is arranged, the shoveling and conveying device has the function of tensioning and deviation adjusting of the belt.

The application discloses an open-air drilling machine and a control system and method thereof, and belongs to the technical field of engineering machinery. The open-air drilling machine control system comprises a rock drill, a drill rod and a connecting sleeve. The open-air drilling machine control system comprises a hole depth sensor for collecting state information of a current hole; an execution device for realizing disconnection or connection between the drill rod and the drill rod according to an input electric signal; and a control device for sending a control signal to the execution device according to a control signal sent by the hole depth sensor to realize control of the execution device. The open-air drilling machine control system is an important part of realizing digital mines and unmanned mines. The open-air drilling machine control system can be used for subsequent automatic positioning and automatic walking, and can realize real unmanned operation. Moreover, the open-air drilling machine control system can be used for program setting, unified and optimized operation process and standardized operation.

The utility model provides a quick hole distribution device for step blasting, which relates to the technical field of mineral blasting and comprises a table plate, a vertical rod is connected onto one side of the table plate, measuring rods are rotatably mounted on two sides of the vertical rod on the table plate at equal intervals, and connecting points of the measuring rods, the vertical rod and the table plate are positioned on a connecting line. A marking mechanism is mounted on the other surface of the table plate and is coaxial with the vertical rod; and a compass is mounted at the top end of the vertical rod. According to the utility model, the distance between the required holes can be determined through the two measuring rods, and the horizontal orientation between the required holes can be obtained through the compass, so that the distance and the direction between the adjacent required holes can be accurately determined under the condition of one person, and the marking efficiency of the required holes can be improved.

The invention belongs to the technical field of strip mine medium-length hole blasting, and provides a strip mine medium-length hole blasting hole distribution device and a blasting method thereof. The device comprises a central assembly shaft; one end of the central rotating shaft extends into the strip mine deep hole, and the other end is in transmission connection with an external power source; the central group shaft comprises at least one rotating shaft which is connected one by one; the bottom expanding hole part is detachably mounted on the central group shaft, is positioned on the rotating shaft and is close to the bottom of the medium-length hole in the strip mine; the bottom hole expanding part comprises a mounting sliding sleeve, a hole expanding group cutter and a telescopic piece; the mounting sliding sleeve is slidably mounted on the central group shaft; the reaming group cutters are mounted on the mounting sliding sleeve and are uniformly distributed in the radial direction of the mounting sliding sleeve; one end of the chambering group cutter is hinged with the mounting sliding sleeve, and the other end of the chambering group cutter is propped against the hole wall of the blasting cloth hole; one end of the telescopic piece is mounted on the mounting sliding sleeve and hinged to the mounting sliding sleeve, and the other end of the telescopic piece is hinged to the reaming group cutter; the method comprises the following steps: S1, connection; s2, mounting is carried out; and S3, chambering.

The invention discloses a mine rock drill, which relates to the technical field of rock drills and solves the technical problem of direction adjusting.The mine rock drill comprises a hydraulically telescopic base with wheels, an electrically telescopic mounting frame is fixedly mounted at one end of the top surface of the base, and a rock drill head is arranged on the mounting frame; a control room is fixedly installed on the side, away from the installation frame, of the top face of the base, and a direction adjusting assembly for adjusting the direction of the rock drill head is arranged on the installation frame. The direction adjusting assembly comprises a mounting groove formed in the side, close to the base, of the mounting frame, a two-way screw is rotationally mounted in the mounting groove, sliding blocks are mounted at the positions, close to the two ends, of the two-way screw in a threaded penetrating mode, and rotating plates are rotationally mounted on the sides, away from the two-way screw, of the sliding blocks. A top plate is rotationally mounted between the two rotating plates; the digging direction of the rock drill head can be conveniently adjusted according to the digging requirement, the direction adjusting capacity of the device can be improved, and the working efficiency of the device for digging rocks can be improved.

This is a construction method of spaced explosive loading blasting in open-cut mines. [Solution] In this blasting method, in areas with low hardness coefficient rock, a combination of bottom-interval and middle-interval explosive loading is used. This increases the height of the lower charge column while simultaneously reducing the total amount of explosive charged in the hole, significantly reducing blasting costs while maintaining better blasting results. In areas with high hardness coefficient rock, a middle-interval explosive loading method is used, increasing the amount of explosive charged at the top of the blasthole axis, effectively reducing the occurrence of large blocks at the hole mouth and reducing the amount of secondary mechanical crushing work after blasting. The mutual cooperation between the various components of the middle-interval mechanism enhances the reflection and overlap of explosive shock waves, strengthening the stress field and extending the stress action time, thereby achieving a larger blasting impact. This ultimately improves blasting energy utilization, achieves more uniform rock crushing, and reduces the rate of large blocks after blasting.

The present invention provides a double-sector steering method for the triangular boundary of an open-pit mining area. The steering method includes the following steps: Step 1, at the boundary of the triangular area, mutually perpendicular end walls and working walls are formed along the advancing direction of the first mining area to divide the triangular area into a first sector rotation interval and a second sector rotation interval of the triangle; the working wall of the first mining area continues to advance with the original working line length, and is arranged in a ditch on the end wall on the side close to the adjacent mining area until the end wall is close to the boundary of the first mining area; Step 2, mining and advancing the first sector rotation interval in accordance with the sector direction; Step 3, rock stripping amount and total coal mining amount are calculated based on the sector angle and specific parameters of the open-pit mine; the working wall rotates and advances until the first sector rotation interval is completely mined; Step 4, mining and advancing the second sector rotation interval in accordance with the sector direction. The steering process of the present invention is coherent and easy to implement on site, eliminating the cost of secondary stripping; the working line length variation range during steering is small, which is conducive to equipment layout and construction.

The utility model relates to the technical field of mine mechanical equipment, and provides a novel mine sawing machine which comprises a machine body, a saw blade and a control system which are arranged on the machine body and further comprises at least one group of protection alarm units, and each group of protection alarm units comprises a first fixing column, a second fixing column, a protection wire, a sensor and an alarm. The first fixing column and the second fixing column are arranged on the same side, where the saw blade is installed, of the machine body and located on the left portion and the right portion of the machine body respectively, the two ends of the protection line are arranged on the first fixing column and the second fixing column respectively, and at least one end of the protection line is detachably connected with the first fixing column or the second fixing column. The middle of the protection line stretches across the outer side of the saw blade, the sensor is arranged at one end of the protection line to detect whether the protection line shakes or not in real time and send detection information to the control system of the machine body, and the alarm is connected with the output end of the control system to give an alarm about shaking of the protection line. The mine sawing machine solves the problem that a saw blade is inconvenient to maintain and replace due to the fact that an existing mine sawing machine is provided with a protective cover.

The present application belongs to the technical field of mining equipment. In order to solve the problem that the existing side slope mining equipment is generally fixed or semi-fixed, which cannot meet the unloading requirements under different working conditions, a kind of open pit side slope mining multi-degree of freedom unloading device is provided. The device includes a support seat, a horizontal unloading part, a first drive assembly, a high beam, an inclined unloading part, a connecting frame and a second drive assembly. The first drive assembly drives the horizontal unloading part to rotate, and the second drive assembly drives the connecting frame to move, thereby driving the inclined unloading part to rotate around the vertical line of the high beam. The device has a simple structure. By changing the unloading position and unloading height through the first drive assembly and the second drive assembly respectively, the overall unloading part can realize multi-degree of freedom movement relying on the mechanical structure, and the adaptability of the device to different working conditions is improved.

This utility model discloses a pressure-adjustable sand dredging pipe, including a pipeline structure, a sand suction head connected to one end of the pipeline structure, and a pressure pump connected to the other end of the pipeline structure. The pipeline structure includes two rigid fixed pipe sections, a wear-resistant extraction pipe section, and a three-way ball valve connecting the rigid fixed pipe section and the extraction pipe section. The two outlets of the three-way ball valve are respectively connected to the two rigid fixed pipe sections, and the inlet of the three-way ball valve is connected to the extraction pipe section. Both the extraction pipe section and the rigid fixed pipe section are equipped with connecting flanges. This utility model achieves good pressure control by installing a three-way ball valve on the sand dredging pipeline.

The invention discloses a single-line lifting and conveying system and method for a strip mine large-dip-angle rail mine car, belongs to the field of ore transportation, and aims to transport ores quickly, efficiently and safely. Comprising winding drum devices, steel wire ropes, track beams and mine cars. A winding drum device is adopted to rotate a winding steel wire rope to pull a mine car to run along a rail erected from a mine pit to a mine top to achieve ore transportation, rapid, safe and low-cost lifting and conveying of ore are achieved, and the problems that a strip mine deep pit mine is long in transportation mileage, high in climbing, low in transportation efficiency and poor in economical efficiency are solved. In order to solve the problems that in the prior art, the ore transportation speed is high, the transportation distance is effectively shortened, the ore transportation cost and carbon emission are greatly reduced, and safe, environment-friendly, high-quality and intelligent development of mines can be achieved through the method of'taking the elevator by the ores', so that the problems of exponential growth of spare parts, fuel oil, tires and other consumables, great increase of the cost, serious environmental pollution and the like are solved. The method has the advantages that the ore transportation speed is high, safe and efficient, the transportation distance is effectively shortened, and the ore transportation cost and carbon emission are greatly reduced.