354results 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 provides a novel coal mining method for an open-air well-to-well worker. The novel coal mining method comprises the following steps: stoping by a slope coal mining machine; filling a mining cave, determining a filling process, selecting one of pumping filling, waste rock throwing machine filling or side upper part drill hole conveying filling in the filling process, and selecting filling materials according to a ratio of waste rock to concrete; carrying out slope stability calculation and analysis and slope monitoring, and carrying out mechanical analysis and calculation by adopting a limit equilibrium method and a finite element method. The invention provides a mining process system and complete equipment, including automation of coal mining and transportation, realization of automatic operation and connection of coal, mining and transportation equipment, improvement of coal mining efficiency and efficiency of a filling system, and realization of key technologies and processes of efficient paste filling, and provides an overlying strata stability monitoring control technology and equipment. The intelligent mining site is realized, the scientific and reasonable cooperation of mining, filling and slope stability monitoring is realized, and the connection is orderly and efficient.

The invention discloses a step type mine quarrying face in-situ ore moving type head section treatment process which comprises the steps that a crawler belt impact type roller crusher is arranged on a mine quarrying face in situ, and the crawler belt impact type roller crusher receives, conveys and crushes in-situ ore mined on the mine quarrying face; each crawler belt moving belt conveyor comprises a movable crawler belt driving base and a conveying belt conveyor body arranged on the crawler belt driving base, and the crawler belt moving belt conveyors are connected end to end to convey materials; the mine quarrying working face comprises a top quarrying working face arranged on the mountain top and a stepped in-mountain quarrying working face arranged on the lower portion of the mountain top. By means of the mountain height difference, the crawler belt moves the belt conveyor, so that conveyed materials roll down from a mine quarrying face towards the mountain or are directly conveyed to the downhill through the long-distance belt conveyor. According to the invention, head section crushing work and quarrying work are combined, intermediate transportation links are reduced, energy consumption is saved, cost is reduced, and flexibility and efficiency are high.

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 a heterogeneous hard rock stratum continuous excavation cutting control method based on a neural network. Comprising the steps of establishment and training of a deep neural network model, establishment and training of a convolutional neural network model, testing of pre-drilling fracturing operation, extraction and updating of fractured rock stratum characteristics, prediction and control of cutting specific energy consumption, pre-drilling fracturing operation and continuous mining operation. Performing visual identification on the working face of the strip mine and updating the second deep neural network model; the pre-drilling fracturing operation is controlled and adjusted according to the cutting ratio energy consumption index, and it is ensured that the cuttable performance of the heterogeneous hard rock stratum meets the requirement; by monitoring the actual cutting ratio energy consumption value in real time and updating the deep neural network model, the threshold value of the cutting ratio energy consumption is adjusted, and then the technical parameters of the cutting mechanism are adjusted, so that the real-time control and adjustment of the continuous mining operation are realized, and the economical efficiency and the high efficiency of the continuous mining operation of the strip mine in the heterogeneous hard rock stratum environment are improved.

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 a slope coal mining machine, a spiral conveying system and a control method. The spiral conveying system of the slope coal mining machine comprises a plurality of propelling arms which are cascaded section by section; a containing cavity for containing coal is formed in the middle of the propelling arm, and a spiral conveying rod is arranged in the containing cavity in the length direction; the spiral conveying rod comprises a spiral shaft and spiral blades arranged on the spiral shaft, spiral driving fins are arranged on the portions, close to the two ends, of the spiral shaft in the circumferential direction, the first end of the spiral shaft is of a taper pin structure, and the second end of the spiral shaft is of a taper hole structure matched with the taper pin structure. The spiral conveying rods between the adjacent propelling arms are inserted into the taper hole structures through the taper pin structures to achieve positioning connection, and cascade spiral conveying rod driving in the rotating process is achieved through end face contact of the adjacent spiral driving fins.

The invention discloses an intermediate bridge rapid dismantling and pressed coal recovery method based on throwing blasting, a bridge body dismantling area is divided into a bridge body primary dismantling area and a bridge body secondary dismantling area, a coal step is divided into a coal step primary coal mining area and a coal step secondary coal mining area, the first step is bridge body primary dismantling; 2, primary coal mining; thirdly, the bridge body is dismantled for the second time; and 4, secondary coal mining. According to the method, the materials in the bridge body demolition area are crushed and thrown through the throwing blasting method, the purpose of dispersing the materials in the bridge body demolition area is achieved, on one hand, the materials in the middle bridge position and the goaf position can be stripped at the same time, the bridge body demolition time is shortened, and the bridge body is communicated in advance; on the other hand, the wide space of the goaf is fully combined with storage of secondary stripping materials, the secondary stripping workload of the bridge body dismantling area is reduced, and the secondary stripping cost is saved.

The invention relates to a continuous coal mining process and equipment for a slope working face of a strip mine. The equipment mainly comprises a foundation mounting part, a transfer part, a roller cutting part, a walking part and an on-slope supporting vehicle. The cutting posture of the roller cutting part is adjusted through the main rocker arm, the auxiliary rocker arm and the hydraulic system, the cutting roller can slide up and down along the main rocker arm to adapt to different coal seam thicknesses and dip angles, and the flexibility of coal mining operation is improved. The on-slope supporting vehicle is in linkage with the main rocker arm, the operation height and angle of the equipment can be adjusted, and stable supporting is provided by sliding along the slope surface. The transferring part achieves cleaning, collecting and conveying of coal through a U-shaped scraper conveyor, and a flow sensor is arranged to monitor the coal flow condition in real time. The walking part is of a crawler belt structure and has an automatic adjusting function, and the stability and the adaptive capacity of the equipment are improved. Through optimization design and intelligent control, the operation efficiency and reliability are improved, and the system is suitable for continuous coal mining operation under complex terrains.

The invention discloses a seasonal mining method for an open-pit mine. The seasonal mining method comprises the five steps of advanced stripping, groove cutting depth, pit bottom inner drainage, transverse stripping and transverse mining, groove reserving along a panel and continuous preparation. According to the seasonal mining method, an advanced flat panel is reserved, and weathering and spontaneous combustion after large-area exposure of a coal seam can be avoided; the total length of the transverse mining working lines is not smaller than the length of the strip mine working lines before implementation, and the capacity of the strip mine cannot be reduced; the pit bottom space of the strip mine is adjusted and used in advance, so that the problem that the inner discharge space is insufficient during concentrated stripping is solved, and the problem that the transportation distance of stripped objects is increased in the advanced stripping process is also avoided; a construction space is provided for the next procedure by a groove reserved along the coil; according to the method, the relation between mining, stripping and discharging of the strip mine is re-coordinated on the whole, the mining area space is adjusted, mining area production is not thoroughly modified, construction is easy, and the management difficulty is low.

The invention relates to the technical field of strip mine drilling rock debris, aims at solving the problems that in the prior art, the labor intensity is high when rock debris is manually collected, and the collected rock debris is easily blown away by strong wind, and particularly relates to a strip mine drilling rock debris collecting and shaping device which comprises a collecting device and a shaping device connected with the collecting device. The collecting device comprises a positioning shaft, an annular cover, a spatial position adjusting mechanism, a collecting mechanism and an extruding mechanism; the spatial position adjusting mechanism is used for adjusting the position of the positioning shaft to connect the positioning shaft with the blast hole; the positioning shaft is fixedly connected with an annular cover, the annular cover and the positioning shaft jointly form a chip containing cavity with the top end closed and the bottom end provided with an opening, and an extrusion mechanism connected with the positioning shaft is arranged in the chip containing cavity. The collecting mechanism is rotatably connected to the positioning shaft; the shaping device comprises a mounting plate, a pressurizing assembly, a stirring assembly and a spraying assembly; the pressurizing assembly, the stirring assembly and the spraying assembly are fixedly mounted on the mounting plate; the pressurizing assembly is connected with the stirring assembly which is connected with the spraying assembly.

The invention discloses a push type slope coal mining machine and a mining method. The slope coal mining machine comprises a base body platform; the moving system is used for driving the base body platform to ascend, descend, move or steer; the anchoring system is used for fixing the base body platform moving to the target position; the digging and mining system is used for crushing and stripping materials, collecting the materials and conveying the materials to the conveying system; the conveying system comprises one or a plurality of conveying units which are sequentially connected in series step by step, one end of each conveying unit is connected with the digging and mining system, the other end of each conveying unit is detachably connected with the propelling system, and the conveying units are used for continuously conveying materials mined by the digging and mining system to the base body platform through the conveying system; the propelling system is used for pushing and pulling the connected conveying system to move back and forth so as to drive the digging system to perform footage mining or withdrawing; and the disassembling and assembling system is arranged on the side of the base body platform and can disassemble and move the conveying unit located on the base body platform out of the conveying system or move the conveying unit to the base body platform to be connected into the conveying system.

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 invention discloses an exposed gear type pitching device for a dumping plough of strip mine mining equipment, and belongs to the technical field of strip mining. The large gear and the small gear form a starting gear pair, the tower is coaxially connected with the large gear through a shaft system, the balance weight is connected to one side of the tower, the connecting rod is hinged to the other side of the tower, the connecting rod is hinged to a pitching component, and the small gear which is installed on a bearing steel structure and driven by a driving device is in transmission connection with the large gear. The large gear is connected with the tower through the fixing assembly, and torque generated by the driving device is transmitted to the large gear through meshing of the small gear and then transmitted to the tower through meshing of the large gear, so that the tower rotates around the shaft system, and the pitching component is driven to rotate through the pull rod. Torque needed by pitching is driven through meshing of an open gear pair, efficient, reliable and safe operation of equipment in a low-temperature environment can be guaranteed, then the mining intensity of high-latitude strip mines is guaranteed, and application and popularization of a continuous and semi-continuous mining process system in low-temperature areas are accelerated.

The invention discloses an automatic positioning and loading system for a mine car and a control method. The system comprises a display module, a sensing module, a path planning module, a satellite positioning module and a communication module. Operation areas around the electric shovel are divided based on the size of a cab of the electric shovel and the maximum and minimum lengths of a shovel arm of the electric shovel and comprise a shoveling waiting area, a loading area and a danger area, and the operation areas are updated in real time along with the position change of the electric shovel; parking points in a loading area are determined according to the direction of a bucket of the electric shovel and the extension length of a shovel arm, information of all vehicle ends is shared in real time through a communication module, and a truck drives into the parking points for loading through a path planning module when a front vehicle safely drives away from a safe area. According to the mine car automatic positioning mineral aggregate loading and unloading system and the control method, the problem that accurate loading cannot be achieved due to the fact that the distance between the parking position of a truck and an electric shovel is too close or too far is solved, and the working efficiency of mineral aggregate loading and unloading can be improved while safe operation can be guaranteed through division of an operation area.

The invention discloses an automatic control system and method for an open pit coal mine excavator, and the method comprises the steps: obtaining a coal pile surface state image and a coal pile spectrum image set collected by a spectrum sensor and a camera; a deep learning-based neural network model is adopted to perform feature extraction on the coal pile and the coal pile to capture external morphological features and internal attribute features of the coal pile so as to obtain surface state features and spectral feature representations of the coal pile; and further performing multi-mode comprehensive analysis on the surface state characteristics and the spectral characteristics to mine essential correlation characteristic representation between the surface state characteristics and the spectral characteristics, and accurately judging the type of the coal pile based on the essential correlation characteristic representation. Through the mode, accurate recognition of the coal pile can be realized, so that the mining task instruction is intelligently generated, and the mining efficiency and the resource utilization rate are 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 relates to the field of open-pit coal mine mining, in particular to an open-pit coal mine full-continuous coal mining layered mining system which comprises an excavating unit, a coal mining unit, a coal mining unit, a coal mining unit, a coal mining unit, a coal mining unit and a monitoring unit, and the excavating unit is used for carrying out continuous layered excavating operation on a coal seam of an open-pit coal mine; the crushing unit is used for screening and crushing excavated coal briquettes and ores and comprises a mounting frame, a shell is mounted on the mounting frame, a filtering cavity, a crushing cavity and a deposition cavity are sequentially formed in the shell from top to bottom, a feeding port and a discharging port are formed in the side walls of the two sides of the filtering cavity respectively, and a power assembly is mounted at the bottom of the deposition cavity; a crushing assembly is mounted in the crushing cavity, and the power assembly is used for providing driving force for the crushing assembly; the system further comprises a transfer unit, a transportation unit and a control unit used for monitoring the operation state of each unit. A plurality of functional units such as excavating, screening, crushing, transferring, transporting and intelligent monitoring are integrated, and an efficient, automatic and intelligent mining system is formed.

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 invention relates to the technical field of stone processing treatment, in particular to a mine quarrying face in-situ stone crawler belt impact type roller rough machining device, an impact type roller crushing device is arranged above a crawler belt type driving part, and a heavy chain type scraper conveyor is arranged below the crushing device; the scraper conveyor comprises a feeding section, a concave section and a discharging section, and the concave section is arranged below the crushing device; a power conveying roller is arranged above the concave section and is provided with a spiral guide rail; the power conveying roller is connected with a crushing bearing bottom plate which is elastically connected in the feeding and discharging direction. A rolling shaft of the impact type rolling shaft crushing device is arranged in the crushing cavity, and the distance between the vertical projection of the outer edge line of the foremost hammer head of the rolling shaft on the crushing bearing bottom plate and the foremost feeding outer edge of the crushing bearing bottom plate is not larger than one half of the distance between the foremost hammer head and the vertical projection of the crushing bearing bottom plate. The problems that materials are prone to being blocked during in-situ crushing on a mine quarrying face, and damage to a material conveying device is large are solved.

Examples provide methods, systems, and computer program products that estimate the bulk volume of materials held by a load container during a digging cycle and / or held by a load container. The method includes collecting image data of a load container during a digging cycle. The method also includes identifying key points of the load container from the image data representing the load container and estimating occluded key points of the load container using the image data and the key points. The method further includes calculating a three dimensional profile of the material held by the load container and fitting a model with the key points and the occluded key points to the three dimensional profile of the material to determine pose. The method further includes estimating a bulk volume of the material based on the three dimensional profile of the material and the pose.

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 utility model discloses an open-pit coal mining device, which relates to the technical field of open-pit coal mining. The utility model includes a base, a dustproof component and a stabilizing component. A mounting frame is provided on the left side of the top of the base, and the right side of the mounting frame is mounted with the base through two hydraulic cylinders. A crushing roller is provided between the two sides of the inner cavity of the mounting frame, and a material receiving cover is fixedly connected to the bottom between the front and rear sides of the inner cavity of the mounting frame, and the dustproof component is provided on the top of the mounting frame. Through the provision of the dustproof component, the utility model can deliver dust reduction to the atomizing nozzle through a water pipe, and the atomizing nozzle sprays water in the form of atomizers. At the same time, the cylinder drives the tooth plate to move forward and backward, and the movement of the tooth plate cooperates with the gear to control the atomizing nozzle to swing back and forth continuously, thereby increasing its dust reduction range, so that a large amount of dust will not be generated during the open-pit coal mining process, and the dust can be prevented from blocking the sight of the workers and affecting their health.