Matches 1 - 50 out of 76 1 2 >


Match Document Document Title
8979211 Demountable pin and collet assembly and method to securely fasten a ranging arm to a longwall shearer using such assembly  
A pin-and-collet assembly, a longwall shearer comprising a ranging arm attached to a lifting bracket with such assembly, a method for the secure fastening of one piece to another, such as securely...
8770373 Conveyor system for continuous surface mining  
A side shifting conveyor is provided for a surface mining operation. The conveyor generally includes conveyor sections and conveyor translation devices. Each conveyor translation device includes a...
8651581 Safety device for the movable excavation devices in an underground longwall mine  
A safety device which detects personnel data of persons located in the detection zone thereof, said safety device operating continuously or in regular cycles and reporting to the central...
8562077 Method of setting an automatic level control of the plow in plowing operations of coal mining  
A method of setting an automatic level control of a plow in longwall mining operations. By means of a boom control mechanism, a control angle for setting motion of the plow, which is guided on a...
8474918 Method and device for monitoring a cutting extraction machine  
A method and a device can be used to monitor the travel path of a cutting extraction machine (1), particularly one used in coal mining, which can be moved along the working front (10) equipped...
8469455 Method for controlling a cutting extraction machine  
The invention relates to a method for controlling a cutting extraction machine, which can be moved along a working front in longwall mining, in which method the heat emission of the working face...
8465104 Extraction system for mineral extraction and retaining device for a sensor system therefor  
The invention relates to an extraction system for mineral extraction, having a machine frame which is movable along a conveying device and which for each direction of travel, on its front side...
8376467 Method for automatically producing a defined face opening in plow operations in coal mining  
A method for automatically producing a defined face opening in a longwall mining operation in underground coal mining, using a face conveyor, at least one plow, as an extraction machine, guided on...
8157330 Method and apparatus for maintaining longwall face alignment  
A mining machine includes a light source and a roof support guide for detecting the relative angular alignment between the mining machine and the roof support. The light source in the form of a...
8157331 Method for steering a mining machine cutter  
A control system monitors the angle of each ranging arm, with respect to the mainframe of the machine. While the machine is in a defined zone along the face, if the angle of the arm is detected to...
8128176 Device for determining the cutting horizon of a mining extraction system, and pan element therefor  
The invention relates to a device for determining the cutting horizon of a mining winning system, having a movable conveyor which is composed of individual pan elements, and having at least one...
7725232 Arrangement for monitoring the location of a mining vehicle in a mine  
A method and a system for monitoring the location of a mining vehicle in a mine. The mine comprises a first and a second work area. At least one identifier (29) whose exact location is known is...
7600822 Method for the mining of coal and coal planer installation  
A method for mining and a planer installation for the mining of coal, with a coal planer that can be moved by a planer chain that can be driven via a drive chain wheel of a drive station for the...
7549709 Mining device  
The invention relates to a mining device that is used at the face of a mine, said device comprising a sensor that is mounted on the planer for identifying the rock and transmitting rock data for...
7393059 Planing device and method for activating a planning device  
A planing device and a method for activating a planing device, with a mining planer reversibly moveable by means of a planer chain, with at least two chain drives having variable-speed drive...
6857705 Mining machine and method  
A control system for a mining machine which moves in passes across a seam to be mined using absolute coordinates is disclosed. The machine is carried on rail and co-ordinates of the rail are...
6481802 Control system for longwall face alignment  
In a control system for the longwall support with a plurality of hydraulically actuated supports (mining shields), which are each automatically rearranged in the sense of robbing, advancing, and...
6361119 Mining control system for adjusting the advance of mining tools  
A mining control system for adjusting the advance of the working tools of a mining machine with respect to working depth and/or working height connects to a detection device that is for...
6257671 Device for protecting selective cutting machines against overload  
The invention relates to a device for protecting selective cutting machines against overload, in which the selective cutting machine has cutting tools, in particular cutting rollers, rotatably...
5931540 Drive system having a pin drive chain for a cutting machine for underground mining  
In the drive system according to the invention for a cutting machine which can be moved along a chain conveyor and has a pin drive chain arranged in a chain receptacle of the chain conveyor, the...
5647640 Continuously operating mining machines with plow and conveyor chains and method of operating same  
A mining machine especially for seam mining as in the mining of coal has a sensor for incipient sag of the plow pass of the continuously driven endless chain and a computer to which the sensor is...
5624162 Long-wall mining machine with a working chain  
A long-wall mining machine has an operating chain entraining conveyor flights or mining tools and displaceable in a trough which can be provided with rows of sensors of an inductive proximity type...
5553925 Apparatus for automatically adjusting the cutting horizon of a mining extraction apparatus  
According to the invention, automatic adjustment of the cutting horizon of a cutter installation or other mining installation is effected with the aid of recognition sensors which detect the...
5513902 Driving system for driving flexible elongate members, such as chains or scraper-chain assemblies, in mineral mining installations and method of operating  
A drive system for driving a flexible elongate member such as a haulage chain for a mineral mining machine or scraper-chain assembly of a scraper-chain conveyor of a mineral mining installation...
5228751 Control system for longwall shearer  
Apparatus for measuring the degrees of roll of the body of a longwall shearing machine and providing signals proportional to the roll angle which are used to control drum cutting positions for...
5158341 Method of steering a mining machine  
A method of steering a double-ended ranging drum type mining machine. The method includes the steps of positioning a first current cut follower at or substantially adjacent the center of the...
5121971 Method of measuring uncut coal rib thickness in a mine  
A method for remotely monitoring conditions such as carbon monoxide or methane gas concentration, longwall roof support pressure, machine parameters or uncut coal, trona or potash layer thickness...
5087099 Long range multiple point wireless control and monitoring system  
A method for remotely monitoring conditions such as carbon monoxide or methane gas concentration, longwall roof support pressure, machine parameters or uncut coal, trona or potash layer thickness...
5020860 Methods and apparatus for maintaining longwall face alignment  
Mine panel alignment is controlled by recording the electromagnetic phase modulation and/or signal attenuation between spaced distant transceivers in the panel and a transceiver on a cutting...
5017051 Electrohydraulic control means for hydraulic self-advancing support units  
A control means for hydraulic self-advancing support units for underground working, comprising at least one electrohydraulic control device comprising an electric circuit for energizing...
5013091 Method of indirect measurement of cowl position on a longwall shearer  
The position of the cowl on a longwall shearing machine is determined by loads, stresses or deflections measured on the ranging arm, clevis and pin connection on the ranging arm or lift cylinder...
4976495 Method and apparatus for steering a mining machine cutter  
The trailing drum of a double-ended ranging drum shearer is steered in a seam by producing an algorithm which determines, as a result of information derived from signals from the machine dependant...
4952000 Method and apparatus for increasing the efficiency of highwall mining  
A highwall mining machine having a power head located on a bench adjacent the highwall and a cutter head operable to cut a mined hole into a coal seam when thrust forward by the cutter head...
4822105 Double ended ranging drum shearer and method of controlling working height in mining face in use of the same  
A double ended ranging drum shearer is provided with a shearer body and a pair of drums disposed at front and rear end portions of the shearer body to be movable up- and down-wardly. The shearer...
4776637 Cutting machines and method of controlling the cutting horizon  
A cutting machine including a base, a cutter movably mounted on the base, and a drive for moving the cutter reciprocably along the base to carry out a cutting operation. The cutter height relative...
4741577 Double ranging drum cutter having load controller  
According to the applicant's invention a load detector is used, in which a load sensor and a vibration sensor are combined using an AND gate. A load signal from the load detector is used for the...
4715657 Double ranging drum cutter having bedrock sensor based on video image processing system  
A double ranging drum cutter for long wall type machines for coal extraction is disclosed, which comprises a drum cutter body, a television camera mounted on the drum cutter body for picking up an...
4691967 Apparatus for controlling the discharge of pressurized liquid from nozzles on a cutting drum of a mining machine  
A liquid discharge control system is provided for nozzles on a shearer or cutter drum for a drum-type shearer loader or heading or drifting machine used in underground mining. In addition to...
4648659 Method and hydraulic system for controlling supply of fluid to combine for extracting minerals  
A method for controlling the supply of fluid to a combine, wherein fluid is fed for actuating hydraulic cylinders 14, 15 of the drive for moving the combine and to a dust suppression hydraulic...
4643482 Steering of mining machines  
A double-ended ranging drum shearer is steered along a longwall face by using a series of spaced reference locations A, B, C, D, E, F, G, H. I . . . . The machine position is sensed so as to...
4634186 Control system for longwall shearer  
A control system for controlling the elevation of a cutter of a longwall shearer in which the attitude of the body of the shearer and the rate of change of attitude with longitudinal movement of...
4533180 Fluid supply system for rotary cutter heads for mining equipment and to mining machines comprising rotary cutter heads having fluid supply systems  
A fluid supply system for a rotary cutter head of mining machines comprises a plurality of nozzles for directing air flow inducing sprays in the vicinity of the cutter head, and sensor means for...
4531782 Mining equipment  
Mining equipment for steering the cutting horizon of a mining machine cutter which is mounted on a ranging arm and which in use makes repeated traverses along the working face, comprises a boom...
4516807 Fluid supply systems for rotary cutter heads for mining machines and rotary cutter heads comprising fluid supply systems  
A rotary cutter head drivably mountable on a rotary drive shaft of a mining machine comprises a hub assembly drivably mountable on the drive shaft and a barrel component secured around the hub...
4466667 Longwall shearer tracking system  
A tracking system for measuring and recording the movements of a longwall shearer vehicle (10) includes an optical tracking assembly (B) carried at one end of a desired vehicle path and a...
4465318 Rotary cutting head for mining machines with means for inducing airflow and sensing thereof  
A rotary cutter head for a coal mining machine comprises sensor means for sensing a preselected state, as for example, the methane concentration in the vicinity of the cutter head and for deriving...
4428618 Mining machine control signal processing system  
A signal processing system for an underground mining machine having a steerable mineral cutter and a sensor which senses natural radiation emitted from rock strata overlaying the radiation...
4371209 Mining machine steering equipment  
A mining machine comprising a ranging drum having two operational positions adjacent to the mine roof and to the mine floor, respectively, is provided with machine steering equipment comprising a...
4367900 Mineral mining installation with electronic control  
A shearer-type mineral winning machine has three-phase a.c. motors on its main body for driving cutting drums and for propelling the machine along a mineral face. The frequency of the a.c. power...
4351565 Roof sensing control of shearer in longwall mining  
The present invention is directed to a method for regulating position of a mining apparatus comprising the steps of transmission of a plurality of signals from a position detection device,...

Matches 1 - 50 out of 76 1 2 >