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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...
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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...
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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 recognizing...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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 through...
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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 is...
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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...
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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...
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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...
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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 liquid...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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,...
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4290648 |
Mining apparatus
The present invention is directed to a mining apparatus which includes a position detection device comprising at least one projector and receiver to measure position of the apparatus in a mine by...
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4269448 |
Mineral mining machine cutter driving mechanism having a load sensing device to regulate the haulage speed of the machine when the cutter driving mechanism is overloaded
A mineral mining machine having haulage drive mechanism and at least one cutter drive unit for cutting elements which may be at each end of the mining machine. The cutting elements are driven by an...
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4260191 |
Method and apparatus to control tension in a trailing cable and/or waterhose for a mining machine
A signal is generated which varies with the distance between a mining machine and a cable trolley coupled by a rope to a winch disposed toward the lower drift of an inclined mine seam. The cable...
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4228508 |
Automatic longwall mining system and method
A power loader having upper and lower cutting drums travels along the length of a face conveyor. Seam-top and seam-bottom sensors mounted on the power loader sense the heights of the true seam-top...
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4189183 |
Mining machine with cutter drums and sensing apparatus
A drum cutter for a mining machine includes spaced-apart pick elements projecting radially therefrom and a disc forming part of a sensing apparatus disposed to follow a preceding one of the pick...
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4185876 |
Plural spaced cutter drums on pivotable elongate arm with loading means in the space
A gearhead for a shearer type mining machine comprising an elongate arm pivotally attachable at or about its mid-position to a shearer type mining machine to provide an arm pivot axis extending...
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4130319 |
Mining machines
A longwall mining machine is provided with a roller resiliently urged into engagement with a track extending along the longwall face. Sensor means are provided to sense rotation of the roller and...
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4111487 |
Underground mining machine with longwall guidance system
A signal derived from means, e.g. a gyroscope, mounted on the machine is used to guide a shearer drum along a straight path, the shearer being mounted on an underframe including two pivotally...
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4099782 |
Control system for a mineral mining installation
A system for controlling the thrust applied to a mineral winning machine, which is movable along a guide at a longwall face in a mine working, includes control means which regulates the thrust...
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4097091 |
Method and apparatus for securing mining machines employed on inclined or steep seams
A method for securing mining machines, particularly longwall mining machines from sliding on inclined or steep seams in the event of a malfunction of a traction element or driving unit. The...
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4093309 |
Method of and apparatus for controlling advance of underground armored conveyors
In controlling advance of an armoured conveyor in an underground mine, detector means detect the advance of different conveyor sections and control means control current and/or subsequent advances...
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4045083 |
Longwall mining machine with haulage motor sensed pressure controlled rail brake
The control of a mineral mining machine having a hydraulic haulage motor senses the pressure of pressure fluid fed to the drive motor to apply brake mechanism when the sensed pressure is below a...
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3988578 |
Method and apparatus for controlling the steplessly variable cutting rate and feed rate of mining machines
Method and apparatus for controlling a mining machine, specifically a longwall mining machine, of the type in which the mining machine is advanced into a mineral seam by an advancing motor and a...
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3980338 |
Method and apparatus for controlling water sprays of an underground extraction machine
Water is discharged from spray nozzles toward cutting tools of a drum-cutting mining machine only during the actual time when material is released from the face of a mine. A pulse generator is...
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3954299 |
Longwall mining machine with pivotal body adjustment
A ranging drum mining machine has its cutting end gearbox pivotally mounted in trunnions for pivotal movement about an axis transverse to the axis of pivotal movement of the ranging arm.
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