17results about How to "Improve coal mining efficiency" patented technology

The invention discloses a planned cutting curve issuing control method based on a predictive coal cutting technology, and belongs to the technical field of coal mine collection. Comprising the following steps: acquiring coal mining machine operation cutting data; a mathematical model is established based on the predicted coal cutting data, and a next cutting prediction curve is obtained; monitoring the running state and environmental parameters of the coal mining machine in real time, and generating an optimal cutting planning curve path; an operator judges whether the cutting curve path is optimal or not, if not, the above steps are executed circularly, and if yes, the following steps are executed; and issuing the generated optimal cutting planning curve path to the coal mining machine. The invention provides a planned cutting curve issuing control method based on a predictive coal cutting technology, which can realize generation of a planned cutting curve of a next cut based on historical cutting data, can edit and issue in advance according to geological data, reduces manual intervention in a production process, improves mining efficiency, realizes visualization of a predictive coal cutting curve, and is suitable for popularization and application. And the production process can be controlled, and the mining stability and safety are improved.

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 embodiment of the invention provides a cutting head device and a coal mining machine, and belongs to the technical field of mining equipment. The cutting head device comprises a machine body, at least two machine arms and at least two cutting heads, the at least two machine arms are sequentially arranged at intervals in the vertical direction, and the first end of each machine arm is connected with the front end of the machine body in a swinging mode so that the second end of each machine arm can swing in the vertical plane; and the at least two cutting heads are connected to the second ends of the machine arms correspondingly, and the distance between each cutting head and the machine body is gradually reduced in the vertical downward direction. According to the embodiment of the invention, the mining efficiency is improved by adding the machine arms and the cutting heads, and steps can be formed on a coal seam in the coal mining process by adjusting the distance between each cutting head and the machine body, so that the height difference when damaged coal falls down is reduced, the splashing distance of the coal is reduced, and the coal is easier to collect.

The invention discloses an ultra-thin coal seam coal mining machine which is used for mining coal on a coal wall and conveying mined coal briquettes to a designated area through a scraper conveyor. The ultrathin coal seam mining machine comprises an electric cabinet, a left traction part and a right traction part which are respectively arranged at the left end and the right end of the electric cabinet, a left rocker arm and a right rocker arm which are respectively arranged on the left traction part and the right traction part, and a left roller and a right roller which are respectively arranged on the left rocker arm and the right rocker arm, the left rocker arm and the right rocker arm are respectively arranged above the scraper conveyor in a crossing manner, so that the space above the scraper conveyor is fully utilized, the space between the left roller and the right roller is prevented from being occupied by the left rocker arm, the right rocker arm and internal structures of the left rocker arm and the right rocker arm, and a machine passing channel does not need to be cut in advance when the coal mining machine is used; the problem that the lifting height of the rocker arm located behind is limited by coal left above the coal mining machine does not exist, it is guaranteed that the range of the whole mining height of the coal mining machine at a time is larger, and the application scene and the coal mining efficiency of the coal mining machine are improved.

The invention belongs to the technical field of coal mining equipment, and particularly relates to a drum shearer with a protection function. Comprising a drum shearer body, a scraper conveyor is installed at the bottom end of the drum shearer body, a drum arm is installed on the drum shearer body, a crushing roller is rotationally connected to the drum shearer body, and the crushing roller is located above the scraper conveyor; a connecting box is installed above the crushing roller, a blocking removing mechanism is installed in the connecting box, the blocking removing mechanism is connected with two ejector rods, and the ejector rods move along with crushing lines on the crushing roller and are used for discharging coal blocks clamped in the crushing roller; according to the large coal crusher, large coal can be effectively crushed, and clamping stagnation is prevented in the crushing process; the coal mining efficiency is improved, the friction and jacking risks of the bottom of the coal mining machine are reduced, and safe and stable operation of the coal mining machine is ensured.

The present application provides an intelligent control system for automatic extension and bottom adjustment of hydraulic supports in coal mining. The control system for automatic extension and bottom adjustment of hydraulic supports includes a host computer, a switch and a hydraulic support, wherein the hydraulic support includes: a controller, a push drive, a bottom adjustment drive, a bottom adjustment solenoid valve, a push solenoid valve, a push oil cylinder and a bottom adjustment oil cylinder. The staff sends an automatic extension and bottom adjustment instruction to the controller through the host computer. The controller is provided with a control logic that matches different automatic extension and bottom adjustment instructions. After receiving the automatic extension and bottom adjustment instruction, the push drive, the bottom adjustment drive, the bottom adjustment solenoid valve, the push solenoid valve, the push oil cylinder and the bottom adjustment oil cylinder are controlled according to the corresponding control logic to realize the automatic extension and bottom adjustment of the hydraulic support. The entire control process is automatically executed by the controller, and the user does not need to realize the automatic extension and bottom adjustment of the hydraulic support by manipulating the controller, thereby improving the safety and the intelligence of coal mining.

The present invention belongs to the technical field of coal mining, and specifically relates to a top-cutting and pressure-relieving wire cutting method, which is used for top-cutting coal rock roof, and the top-cutting is performed by a wire saw machine used for quarrying in a coal mine and a top-cutting drill vehicle. The top-cutting method can be respectively tangent or reverse tangent according to the cutting surface of the coal rock roof relative to the rope laying method of the wire saw machine. In the tangent method, the rope storage device added to the wire saw machine realizes the feeding of the diamond rope action surface by collecting the rope, and in the reverse tangent method, the lifting device pulls the wire rope to drag the stretching device upward to realize the feeding of the diamond rope action surface. The beneficial effect of the present invention is: by adopting the wire cutting method, the coal rock roof is continuously cut without affecting the normal production of the working face, so as to improve the coal mining efficiency and reduce the labor cost.

The utility model discloses a spillplate for a coal mining machine, and relates to the technical field of mining mechanical engineering. The coal baffle for the coal mining machine comprises a fixed baffle, a movable baffle rotationally arranged in the fixed baffle and a coal storage bag connected to the bottom end of the fixed baffle in a sleeved mode, the fixed baffle is arranged to be in an irregular circle shape and is hollow, and installation discs are symmetrically welded to the circle centers of the left end and the right end of the fixed baffle. A straight gear is rotationally arranged on the side wall of the fixed baffle and fixedly connected with a motor through a transmission rod. In order to overcome the defect that the coal blocking area of the coal blocking plate cannot be adjusted, the coal blocking area can be increased through rotation of the movable baffle, and meanwhile the scraper is driven to scrape the inner wall of the fixed baffle to remove coal briquettes adhering to the inner wall.

The application provides a fitting method and device for a coal face floor of a coal mining machine and an electronic device. The method comprises the following steps: obtaining a fluctuation curve of a coal seam floor of a coal mine; after the coal mining machine cuts a coal, obtaining a minimum radius of a stope floor, wherein the stope floor is a floor of a model corresponding to a lowermost coal seam in a space formed after the coal mining machine mines coal, and the minimum radius is a radius of a circular arc formed by up and down fluctuations of a drum of the coal mining machine; generating a circle according to the minimum radius of the stope floor, fitting the circle along the fluctuation curve of the coal seam floor until a curve generated by the circle coincides with the fluctuation curve. In the method, the circle obtained by the minimum radius of the stope floor is fitted in the fluctuation curve of the coal seam floor, so that the curve generated by the circle can be fitted with the fluctuation curve of the coal seam floor as much as possible, and the fitted stope floor can adapt to the change of the coal seam, thereby improving the efficiency of coal mining.

The invention discloses a hybrid power coal mining machine traction part transmission system and a working method. The system comprises a left cutting part, a left traction part, a coal mining machine hydraulic heightening system, a right cutting part and a right traction part. The left cutting part is connected with the left traction part and then is connected with the hydraulic height adjusting system of the coal mining machine, the right cutting part is connected with the right traction part and then is connected with the hydraulic height adjusting system of the coal mining machine, and the hydraulic height adjusting system of the coal mining machine controls the left cutting part, the left traction part, the right cutting part and the right traction part. According to the method, by using a PID control algorithm, according to different working conditions including a normal cutting working condition, a heavy-load cutting working condition, a dynamic adjustment working condition and a complex geological working condition, the output torque of a coal mining machine hydraulic heightening system is dynamically distributed, the problem of insufficient traction force can be solved, the coal mining efficiency is improved, safety is enhanced, the method adapts to variable working conditions, and the service life of equipment is prolonged; the coal mining benefit is comprehensively improved.

The invention belongs to the technical field of roadway arrangement, and particularly relates to a roadway arrangement method for well field development, which realizes continuity, high efficiency, safety and environmental protection of a coal mining process through roadway arrangement, and supports and fills a coal seam while digging; the low-carbon coal gangue, the coarse fly ash, the ordinary cement mortar, the steel fiber material and the accelerator are selected as filling materials after coal mining and are combined with one another to form the filler, the traditional coal pillar reserving mode is changed, no coal pillar is achieved, meanwhile, gas in a coal mining roadway is recycled, safety is guaranteed, economic benefits are improved, and the economic benefit is increased. A continuous coal mining, coal pillar-free, safe, energy-saving, environment-friendly, economic and reasonable process is manufactured, corresponding analysis is performed on corresponding technical data indexes, coal seam mining is optimized, and the resource utilization rate is increased.

The utility model belongs to the field of conveying equipment, and relates to a telescopic rack and conveying equipment, the telescopic rack comprises a power transmission unit and a telescopic unit, and the telescopic unit is connected to the power transmission unit in a sliding mode; the power transmission unit comprises a first rail and a second rail which are arranged at an interval; a balance driven part is connected between the first track and the second track; the telescopic unit comprises a plurality of carrier roller supporting parts, and the side edges of every two adjacent carrier roller supporting parts are connected through a telescopic piece. The carrier roller supporting part located on the leftmost side is detachably connected with the corresponding first rail and the second rail, first rolling pieces are connected to the other carrier roller supporting parts, and the first rolling pieces are matched with the corresponding first rail and the second rail. After the structure is adopted, the telescopic rack has the beneficial effects that the telescopic rack can be used without dismantling the frame of the crossheading belt conveyor, the coal mining production period is prolonged, then the telescopic rack is quickly dismantled, and the coal mining efficiency is improved.

The invention discloses a coal face hydraulic support pulling and moving method which comprises the steps that the top plate breaking condition of a coal face is obtained, and the top plate breaking state is determined in combination with a preset breaking numerical value; the pulling direction and distance of the hydraulic support are determined according to the roof breaking state; according to the determined pulling direction and distance requirements, the height and position of the hydraulic support are adjusted by controlling a hydraulic system, the hydraulic support is pushed step by step, and the top plate is pulled to the safe position. The hydraulic support is pulled according to the roof breaking condition, the position of the support can be adjusted in time, the accident risk caused by roof breaking is avoided or reduced, and the safety of the working face is improved. The problem that the roof of the coal face is broken is common, through a hydraulic support pulling and moving method, the support can be accurately adjusted according to the real-time breaking condition, the stability of the roof is effectively controlled, the roof is prevented from collapsing and being broken, and the safety of personnel and equipment is protected.

The utility model discloses a middle trough dismounting device which comprises a connecting trough, a rotating support is installed on one side of the connecting trough, a lifting appliance is arranged on the rotating support, and the lifting appliance is used for lifting a middle trough to be dismounted. The first end of the connecting groove is detachably connected to the middle groove to be detached, and the second end of the connecting groove is connected to the connecting base of the end support. When the middle trough dismounting device disclosed by the utility model is used for dismounting the middle trough to be dismounted, the first end of the middle trough to be dismounted is dismounted from the adjacent middle trough, the second end of the middle trough to be dismounted is dismounted from the connecting trough, the rotating bracket is rotated, and the lifting appliance lifts and moves away the middle trough to be dismounted. When the middle trough dismounting device is used for dismounting the middle trough, the safety degree of the dismounting process of the middle trough is high, and the dismounting efficiency of the middle trough can be improved, so that the coal mining efficiency is improved, and the economic benefits of enterprises are improved.

The utility model discloses a coal mining machine roller tooth holder installation tool which comprises a base and a profiling template, a transmission mechanism is arranged in an inner cavity of the base, one end of the transmission mechanism is connected with a center distance adjusting handle on one side of the base, the transmission mechanism is connected with a rotary positioning seat on the top of the base, and the profiling template is arranged on the rotary positioning seat. A height adjusting column is arranged at the end, away from the rotary positioning seat, of the top of the base, an angle positioning plate is slidably connected to the height adjusting column, angle scale marks and a reference hole are formed in the angle positioning plate, and the reference hole is rotationally connected with the profiling sample plate. The device can assist an operator in accurately mounting the toothholder, so that the mounting position and angle of the toothholder meet the design requirements of drawings, the cutting teeth fixed on the toothholder in the working process of the roller are uniformly stressed, the service life of each transmission part of the coal mining machine is prolonged, the abrasion of the toothholder is reduced, and the service life of the coal mining machine is prolonged. And the coal mining efficiency is improved.

The utility model discloses a kind of mine scraper conveyor chain break monitoring devices, the monitoring device includes proximity switch, current transformer and controller;The signal output end of the proximity switch is connected with the output end of current transformer and the signal input end of controller;The proximity switch is installed in the chain scraper both sides of head, for monitoring scraper conveyor chain;The current transformer monitors the input current of the motor of scraper conveyor.The monitoring device of the utility model makes judgment after the occurrence of chain break condition, and controller makes judgment through the signal monitored by proximity switch and current transformer, controls head, tail motor to stop quickly, effectively avoids overload operation after scraper conveyor failure, stops in time to ensure equipment safety to avoid larger range failure, improve coal mining efficiency, reduce enterprise production cost.

The invention discloses a coal mining automation control method, system and equipment and a storage medium, and is applied to the following steps: calculating a real-time moving track of a coal mining machine based on a real-time moving posture and a moving distance of the coal mining machine, and correcting the posture of the coal mining machine according to the real-time moving track to ensure that the coal mining machine works in an optimal path; the traction speed of the coal mining machine is determined based on the nameplate capacity of the scraper conveyor, and the traction speed is further adjusted based on the machine following speed of the hydraulic support; and on the basis of the corrected pose information of the coal mining machine, automatic control over face guard plate retracting, support moving, face guard plate stretching, sliding pushing and scraper conveyor pushing of the hydraulic support is carried out. According to the invention, automatic cooperative control of the underground coal mining machine, the hydraulic support and the scraper conveyer is realized, the coal mining efficiency is effectively improved, and the coal mining cost is reduced.