Classifications

• • E—FIXED CONSTRUCTIONS
  • E21—EARTH OR ROCK DRILLING; MINING
  • E21C—MINING OR QUARRYING
  • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
  • E21C35/20—General features of equipment for removal of chippings, e.g. for loading on conveyor
• • E—FIXED CONSTRUCTIONS
  • E21—EARTH OR ROCK DRILLING; MINING
  • E21C—MINING OR QUARRYING
  • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
  • E21C35/24—Remote control specially adapted for machines for slitting or completely freeing the mineral
• • E—FIXED CONSTRUCTIONS
  • E21—EARTH OR ROCK DRILLING; MINING
  • E21C—MINING OR QUARRYING
  • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
  • E21C35/302—Measuring, signaling or indicating specially adapted for machines for slitting or completely freeing the mineral

Definitions

• This invention relates to remote control mining and more particularly to improvements in-the capability of remote control mining systems to maintain the mining machine within the seam and out of cutting relation with the mine floor and mine roof.
• Machine operator training is an
• this objective is obtained by providing lights and a television camera for the working face and trans ⁇ mitting the television picture to a remote monitor enabling the operator to control the operation of the continuous mining machine through suitable remote controls by visual observation of the moni ⁇ tor.
• the light utilized is a compact light such as a full spectrum compact gaseous light source provided with suitable reflectors and lenses for gathering, concentrating and projecting the light source onto portions of the working face to be viewed.
• the television camera is a color camera of broadcast quality having a-remote zoom and a remote focus capability.
• the television receiver is preferably of the high resolution type. It is also within the contemplation of the present invention to utilize the usual audio system embodied in the television camera and the television receiver so that there is provided for the operator not only a visual picture of the operation of the continuous mining machine in the working face but an audible reproduction of the same as well.
• the present system provides a means by which the sight and sound of actual operation can be retained for the operator thus rendering the present system suitable not only for short distance remote control but total remote control as well.
• the present invention further contemplates an improved vacuum air transport arrangement for the coal removed by the remotely controlled continuous miner. It is critical to the practical operation of the system to provide a positive displacement mechanism for establishing the vacuum source out ⁇ wardly of the high wall. By utilizing a positive displacement air pump blockage of the system is effectively precluded. Major separation of the air entrained coal particles is achieved by a simple deflector type separator provided with a rotary air lock mechanism for discharging the solid particles therefrom. The air from the separator then flows through a hydrocyclone type filter, the solids dis ⁇ charge end of which is likewise provided with a rotary air lock discharge mechanism.
• a telescopic transfer mechanism which enables addi ⁇ tional conduit sections having quick connect and disconnect assemblies at their ends to be added and subtracted to the conduit assembly extending to the continuous miner as the continuous miner is advanced and retracted.
• the addition or sub ⁇ traction of conduit sections is accomplished with air flow established through the filter and bypassing the telescopic transfer mechanism and the conduit assembly extending to the miner.
• Figure 1 is a top plan view of the high wall mining system of the present invention
• Figure 2 is a top plan view of the continuous mining machine of the system
• Figure 3 is a side elevational view, with certain parts shown in section, for purposes of clearer illustration of the continuous mining machine shown in Figure 2;
• Figure 4 is an enlarged fragmentary sectional view of the slip joint in the vacuum air conveying system components carried by the continuous mining machine;
• Figure 5 is a sectional view of a conduit section showing a wheeled carriage assembly fixed thereto;
• Figure 6 is a sectional view taken along the line 6-6 of Figure 5;
• Figure 7 is a side elevational view taken along the line 7-7 of Figure 1 showing the telescopic conduit transfer mechanism in its fully extended position;
• Figure 8 is a view similar to Figure 7 showing the mechanism in its retracted position preparatory to receiving a new conduit section;
• Figure 9 is a view similar to Figure 8 showing the new conduit section attached
• Figure 10 is an enlarged fragmentary sec ⁇ tional view taken along the line 10-10 of Figure 7;
• Figure 11 is an enlarged sectional view taken along the line 11-11 of Figure 1;
• Figure 12 is a sectional view taken along the line 12-12 of Figure 11;
• Figure 13 is an enlarged fragmentary sectional view taken along the line 13-13 of Figure 1;
• Figure 14 is a view taken along the line 14-14 of Figure 13;
• Figure 15 is an enlarged elevational view taken along the line 15-15 of Figure 1;
• Figure 16 is a somewhat schematic view illustrat ing the remote control system of the continuous mining machine.
• Figure 17 is a somewhat schematic view illus ⁇ trating the control panel of the control station. '
• a high wall mining system which embodies the principles of the present invention.
• the system includes three basic component assemblies: (1) a continuous mining machine, generally indicated at 10, for advancing in the high wall seam; (2) a remote control guidance system 12 for controlling the movements of the continuous mining machine within the seam from a position outwardly of the high wall; and (3) an expansible and-retractable vacuum air conveying system 14 connectable with the continuous mining machine 10 so as to be advanced in the seam thereby and to effect conveyance of the coal removed from the seam by the continuous mining machine to a position outwardly of the high wall.
• the continuous mining machine 10 utilized in accordance with the principles of the present invention may be any of the known commercially available models.
• a preferred embodiment is the Model #101 Helimatic Miner, manufactured and sold by Dresser Industries, Jeffrey Mining Machine Division.
• Figure 16 illustrates the remote control system schematic of this brochure modified for purposes of the present invention.
• the continuous mining machine 10 includes a track frame 16 having left and right-hand endless track assemblies 18 driven by separated hydraulic motors, indicated schematically at 20 and 22 in Figure 16.
• a sump frame 24 mounted on the track frame 16 for horizontal longitudinal sliding movement.
• a pair of sump cylinders, indicated schematically at 26 in Figure 16 is provided for effecting the reciprocating movement of the sump frame 24.
• Pivoted on the sump frame 24 about a trans- verse horizontal axis is an auger head assembly 28.
• the auger head assembly 28 is moved through raising and lowering movements about its pivotal axis with respect to the sump frame 24 by a pair of auger head cylinders, indicated schematically at 30 in Figure 14, extending between the sump frame 24 and the auger head assembly 28.
• two electric motor drives for the auger cutting head are also provided.
• a gathering assembly 34 which includes a laterally extending scraper type pick-up blade 36 for the auger cutters, auger head assembly 28 and a central conveyor 38.
• a pair of gathering cylinders is provided between the sump frame 24 and the gathering assembly 34 for effecting raising and lowering move ⁇ ments of the gathering assembly 34 and permitting a floating movement thereof.
• a hydraulic motor indicated schematically at 42 in Figure 16 is provided for driving the central conveyor 38.
• the mining machine 10 as manufactured and sold is also provided with a chain conveyor assembly carried by the sump frame 24 for receiving the coal from the central conveyor 38 of the gathering assembly 34 and conveying the same rearwardly of the track frame 16.
• this chain conveyor is not utilized in prac ⁇ ticing the present invention, as will be more apparent hereinafter.
• a third electric motor 44 which drives the hydraulic pump (not shown) to provide hydraulic fluid under pressure for the various hydraulic motors and cylinders.
• the hydraulic cylinders 26, 30 and 40 and the hydraulic motors 22, 20 and 42 are controlled by pilot operated main valves, indicated schematically at 46, 48, 50, 52, 54 and 56 respectively, and the pilot pressure to the main valves is controlled by solenoid operated valves, indicated schematically at 58, 60, 62, 64, ⁇ and 68 respectively.
• the electric motor 44 is provided with a starter 70 connected through a transformer 72 and the two auger motors 32 are provided with starters 74 which operate from a time delay relay 76. All of the above electrical components are connected to lines in a main cable 78 of extensive length forming a part of the remote control guidance system 12.
• the guidance system includes a control station 80 which preferably embodies a construction similar to that of a conventional house trailer. As shown, the control station is located on the high wall bench adjacent the area of the seam of
• the remote control guidance system 12 also includes as a component thereof a large diameter power operated cable reel 82 which is also adapted to be mounted in the area adjacent to and outwardly of the high wall of the seam in which operations are to take place.
• the mounting is one which renders the cable reel 82 portable so that it may also be moved along the seam as successive entries are worked.
• the cable reel 82 is such that it can be rotated in either direction by an electric motor so as to either pay out or wind up an electric cable 78 thereon. It will be understood that the electric cable 78 handled by the cable reel 82 is of a size such that it will not readily bend and hence the requirement for a large diameter reel. The manner in which the length of the cable extending inwardly from the high wall to the continuous miner 10 is handled will be described more fully hereinafter in conjunction with the descrip ⁇ tion of the conveying system.
• the cable reel 82 provides for the capability of continuous electrical connection during the rotating movements thereof.
• the terminal end of the cable 78 wound thereon is preferably connected from the cable reel 82 to a control station 80.
• the control station thus provides for direct remote control operation of all of the-
• these functions are effected by eight electrical switches, indicated at 86, 88, 90, 92, 94, 96, 98 and 100 for controlling the respec ⁇ tively electric motors 44 and 32, cylinders 26, 30 and 40 and hydraulic motors 22, 20 and 24.
• An emergency stop switch 102 is also provided.
• the remote control guidance system 12 includes the provision of auxiliary lights 104 and front and rear television monitoring cameras 106 on the continuous mining machine 10 and a television monitoring receiver 108 at the control station 80 (see Figure.17) .
• auxiliary lights 104 and front and rear television monitoring cameras 106 on the continuous mining machine 10
• a television monitoring receiver 108 at the control station 80 (see Figure.17) .
• a length of coaxial cable 110 which is handled by a power driven cable reel 112, also suitably mounted on the trailer body 84.
• the television cameras and receivers are of the conventional low light cable type well known in the television arts.
• the cable reel 112 is of the type which is adapted to maintain a continuous circuit while the cable is either paid out or wound onto the reel.
• the terminal end of the cable 110 wound on the reel 112 extends to the control station 80.
• the lights 104 provide for a degree of illumination of portions of the space surrounding the mining machine 10 including both toward the working face as well as toward the rear thereof which is sufficiently greater than the light ⁇ ing normally provided by the mining machine 10 to enable the television cameras 106 to pick up pictures which, when viewed by the operator at the control station 80, enable the operator to dis ⁇ tinguish between the coal of the seam and the material (slate or the like) which forms the roof and floor of the entry being mined.
• a preferred arrange ⁇ ment is to provide two wide-angled television cameras 106 on the track frame 16 of the mining machine 10 in fixed positions.
• the number of receivers 108 at the control station 80 can be equal to the number of the television cameras 104
• a preferable arrangement is to provide a suitable switch 114 which will enable the operator at the control station 80 to select which of the two television cameras 106 is to be operated and to be viewed.
• the television cameras 106 and lights 104 associated with the face are used during the advancing movements of the mining machine 10 while the television cameras and lights associated with the rear of the machine 10 are used during the retracting movements of the machine 10 from the entry.
• the lights 104 are preferably a full spectrum compact gaseous light source.
• An exemplary embodiment is a 400 watt CSI lamp #99-0201 which is a metal, halide lamp manufactured by the Thorn Company.
• 1000 watt CSI Thorn lamps #99-0221 may be utilized; Preferably two such lamps may be utilized if desired.
• the compact light sourc bulbs or lamps are used in con- junction with reflectors and lens which gather, concentrate and project the light at " the desired location. While the lights are preferably mounted in fixed position on the continuous mining machine, they can be carried by conventional pan and tilt assemblies if desired.
• An exemplary embodiment of a reflector is the Strand-Century reflector for a 6" fresnel, manu ⁇ factured by Century Lighting Company.
• a preferred lens is the Strand-Century 6-270602-010 lens for a 6" fresnel manufactured by Century Lighting Company.
• the television cameras 106 are preferably broadcast quality color television cameras.
• Exemplary embodiment is the CEI-310 color television camera system manufactured by Commercial Electronics, Incorp ⁇ orated.
• the camera is provided with a zoom lens and an automatic focus module, for example, Fujinon Al2x9 zoom lens and Fujindn servo-focus module.
• the color television camera system is utilized with the audio pick-up, although it is within the contemplation of the invention to utilize the video pick-up of the camera system alone without the audio pick-up.
• the television monitors or receivers 108 are preferably high resolution color television receivers, a specific example being the Ikegami TM-20-8RA monitor S/N 8xB003. While it is within the contemplation of the present invention to mount the cameras 106 in fixed relation on the continuous mining machine in the manner indicated above, where the nature of the con ⁇ tinuous mining machine permits, a single camera may be utilized mounted on the continuous mining machine by a conventional pan and tilt mounting assembly.
• the remote control guidance system 12 includes a rotating beam optical laser unit 116.
• the unit 116 may be of any well-known construction, a preferred embodiment is Model 900-1 made by Micro Grade Laser Systems, Inc.
• the laser unit 116 is positioned just outside of the high wall face so that its beam is projected forwardly perpendicular to the face of the seam and parallel to the planned entry to be mined.
• Mounted on the track frame 16 of the mining machine 10 are two laser beam detectors 118 and 120.
• Each detector may be of any suitable construction, a preferred embodiment is a model compatible with the laser unit 116 in which each has three detecting ⁇ ones or separate laser sensitive areas.
• the two detectors 118 and 120 are mounted on the track frame 16 of the continuous mining machine 10 so that they are aligned in a common vertical plane which is parallel to the center line of the machine 10.
• the two units 118 and 120 are spaced apart in a longitudinal hori ⁇ zontal direction with respect to the axis of the machine 10 and displaced vertically so as to enable the forward- most unit to have a direct line to the laser unit 116.
• the detectors 118 and 120 are provided with readout and light indicator circuitry (not shown) .
• the light indicator of the units mounted on the miner 10 are in a position such that they can be picked up by the rearwardly directed television camera 106.
• the indicator circuitry of the detectors 118 and 120 is connected to the control station 80 by a sufficient length of cable 122 controlled by a power driven cable reel assembly 124.
• the cable reel 124 is mounted on the trailer body 84 and the end of the cable 122 on the reel 124 provides for continuous energization during the cable reel movements and connection to the control station 80.
• the projected rotating laser beam from the unit 116 strikes the detectors 118 and 120 which are mounted horizontally on a line which is parallel to the center line of the miner 10, but on different horizontal planes.
• Each detector 118 is connected to its own control readout unit (not shown) which supplies the power to operate the detector circuits and contains the circuitry to receive and translate the signals from each of the three detector zones.
• the cable 122 transmits the signals of the eight indicators of the detectors to six lights 126, 128, 130, 132, 134 and 136 (see Figure 17) which are illuminated in exactly the same sequence as the lights on the two three-light indicators of the detectors 118 and 120 located on the mining machine 10.
• lights 126, 128 and 130 represent the left-hand, center and right-hand laser sensitive areas of the detector 118 while lights 132, 134 and 136 repre ⁇ sent the comparable areas of detector 120.
• the center zones of both detectors will be energized and the center lights of both three-light detectors and the center lights 128 and 134 at the operator station 80 will be illuminated. Should the machine 10 stray from this straight line (in the horizontal plane) then some other sequence of lights would be illuminated. For example, should the machine 10 start to turn left (as viewed in Figure 1) the right-hand detecting zone of detector 118 and the left-hand zone of detector 120 would be energized, lighting their respective indicating lights 130 and 132.
• the laser system described- above in conjunc ⁇ tion with the television system provides the operator with the capability of remotely controlling the advancing movement of the continuous mining machine 10 into the seam both vertically so that the roof and floor of the entry being mined will be defined by the top and bottom of the seam, and horizontally so that the entry being mined will extend inwardly of the high wall along a straight line following the seam. So long as the seam is vertically straight and does not contain vertical undulations, the laser system will provide the capa ⁇ bility of maintaining a straight entry through the seam.
• a sonar system is preferably also utilized.
• the sonar system includes four sonic trans ⁇ ducers 138, 140, 142 and 144, which may be of any well-known commercial design mounted so that one is provided on each corner of the track frame 16 of the continuous mining machine 10. These sonic transducers are oriented so as to direct their sonic waves toward the adjacent rib or side wall of the entry being mined.
• the transducers may be of any conventional construction and operate in conventional fashion to send out periodic sonic wave pulses in the high frequency zone which strike the rib or side wall toward which -they are directed and are reflected back to the transducer.
• the transducers are provided with circuitry which is capable of detecting the length of time that it takes the emitted sonic wave pulses to leave the transducer and be reflected back.
• the sonic waves are emitted on a continuing intermittent pulse basis separated by small fractions of a second. Since the mined or cut rib is not a smooth surface, one pulse may strike a protrusion on the rib and require less time to be reflected than another pulse that may strike a depression. Thus it becomes necessary to continuously average these measured time periods.
• the extensible and retractable vacuum air conveying system 14 includes as a critical component thereof a positive displacement vacuum air pump, gen ⁇ erally indicated at 154 in Figure 1, which is preferably mounted on the trailer body 84, outwardly of the high wall.
• the air pump 154 may be of any conventional positive displacement design.
• the pump unit provides on its suction side a vacuum air source for the system 14 which is transmitted to the continuous mining machine 10.
• the inlet of the vacuum air system 14 is provided on the continuous mining machine 10 in lieu of the chain conveyor normally provided on such machine as aforesaid.
• the sump frame 24 of the machine 10 provides a box-like construction on which the components of the chain conveyor are normally mounted.
• the structure is provided by a bottom plate 156, the forward end of which curves upwardly along the radius and terminates at a position just rearwardly of the discharge end of the central conveyor 38 of the gathering assembly 34.
• a top plate 158 normally provides for the movement of the top flight of the chain conveyor thereover also is provided.
• the forward edge of the top plate 158 is spaced rear ⁇ wardly from the forward upwardly curving edge of the bottom plate 156 so as to provide an inlet opening 160 into which the coal discharging from the central conveyor 38 is deposited.
• the rearward edges of the plates 156 and 158 are welded in sealed relation with the forward edge of a transition duct 162.
• the transition duct 162 is thus fixed to the sump frame and extends rearwardly thereof and terminates in a circular ring flange connector 164.
• the pipe 168 forms one component of.a
• the rear end of the pipe 168 has a pair of axially spaced rings 170 fixed to the exterior periphery thereof, the rings having a series of balls 172 mounted therebetween.
• the balls 172 are adapted to engage the interior periphery of an outer pipe 174 which forms the other basic component of the slip joint.
• the outer pipe 174 includes a stop ring 176 fixed on the interior periphery thereof at a position inwardly of the forward end thereof. Disposed in outwardly spaced relation with the stop ring 176 is a garlock type annular seal 178.
• a pair of side-by-side inflatable seals 180 Disposed outwardly and adjacent the seal 178 is a pair of side-by-side inflatable seals 180.
• a pair of retainer rings 182 formed on the outer end of the inner periphery of the outer pipe 174 which have a series of balls 184 mounted therebetween which engage the outer periphery of the inner pipe 168.
• a preferred arrangement is to provide for the selective pressurization of the inflatable seals so that the friction provided during times when the slip joint is moved can be varied to accommodate such movement.
• a conventional air conditioning unit 186 there is provided in back of the track frame 16 of the machine 10 a conventional air conditioning unit 186.
• the purpose of this unit 186 is to provide for a self-contained source for cooling the various components of the machine in lieu of the cooling system normally provided.
• the compressor of this system is preferably utilized to provide for a source of pressure for the inflatable seals 180.
• the seals 180 have inlets 188 connected together which inlets lead to an electrically operated three-position valve 190.
• the inlet lines 188 to the two inflatable seals are connected through a pressure regulator 192 to the air compressor source (not shown) of the cooling unit 186, the pressure regulator being set to provide an operating pressure of 20 psi when the three-position valve is in a posi- tion to communicate the pressure regulator to the inflatable seals.
• the three- position valve 190 serves to communicate the inflatable seals 180 with a second pressure regulator 194, which is likewise connected to the air compressor source of the cooling unit.
• the pressure regulator 194 is set to control the pressure at a reduced value as, for example, 10 psi.
• the three-position valve 190 in its third position is adapted to vent the inflatable seals to atmosphere.
• the electrical controls for the three-position valve can be connected to operate with the sump cylinder 26 and control 58 therefor.
• the control 58 for the sump cylinder 26 is actuated to advance the sump cylinders, the signal for this movement is connected to move the three-position valve 190 into its second position so that the pressure of the inflatable seals 188 during the sumping action of the machine will be 10 psi.
• the three-position valve 190 When the sumping cylinders 26 are actuated to move in the opposite direction, the three-position valve 190 is simultan ⁇ eously actuated to move the three-position valve 190 into its third position, thus venting the inflatable seals 188 to atmosphere during the tramming movement of the machine.
• the arrangement is such that the three-position valve 190 will be spring actuated to retain the same in its first position at all other times, thus providing a 20 psi pressure to the seals 188.
• the rearward end portion of the outer pipe 174 is fixedly secured to the track frame 16 of the machine 10, as by a yoke construction 196, and has a female quick disconnect coupling 198 mounted on the rearward end thereof. Any well-known type of quick disconnect coupling can be utilized.
• a preferred arrangement is marketed under the registered trademark PR0NT0-L0CK II by Ciba-Geigy.
• the female coupling 198 includes an enlarged socket having a series of internal threads 200 in its outer end portion and a frustoconical sealing surface 202 disposed inwardly thereof.
• the female coupling 198 is adapted to cooperate with a male quick disconnect couplin 204 formed on one end of a conduit section 206 having a similar female coupling 208' on the opposite end thereof.
• the male coupling 204 includes an interior frustoconical sealing surface 210 on the end of the conduit 206 and a separate externally threaded sleeve 212 having threads adapted to cooperate with the socket threads 200 previously described.
• the vacuum air conveyor system 14 is made expansible and retractable by the provision of a ' multiplicity of conduit sections 206 further selectively interconnected in end-to-end relationship so as to pro ⁇ vide a conduit string which extends from the high wall inwardly of the seam to the continuous mining machine 10 " .
• Each of the sections 206 is constructed in the manner previously indicated which includes male and female quick disconnect couplings 204 and 208 on the ends thereof.
• a wheeled carriage assembly is provided for each conduit sec ⁇ tion 206.
• the wheeled carriage assembly 214 may assume any desired configuration (for example, it may be constructed in the"manner suggested in the aforesaid Densmore patent) , a preferred construction is illustrated in Figures 5 and 6.
• the carriage assembly 214 includes a pair of frame boards 216 connected together in spaced relation by a pair of inverted U-shaped brackets 218.
• the brackets are open at their bottoms and are provided with vertically elongated transverse slots 220.
• Mounted within the slots 220 is an axle 222 having wheels 224 on the ends thereof.
• Fixedly mounted above the axle 222 within each bracket 218 is a spring seat element 226 on which is seated the bottom end of a coil spring 228.
• the upper end of each coil spring 228 seats on the upper surface of the associated bracket 218. This way the frame boards 216 are resiliently suspended on the axle.
• the upper surfaces of the frame boards 216 are provided with aligned saddle-like recesses 230 of arcuate configuration adapted to receive the lower periphery of a conduit section 206.
• a strap 232 whose ends are suitably anchored to pins 234 carried by the frame boards 216.
• the upper surfaces of the frame boards on one side of the main recesses 230 are pro ⁇ vided with aligned recesses 236. These recesses are of a size to receive the main electrical cable 78 extend ⁇ ing to the continuous mining machine which is handled by the cable reel 82.
• a telescopic conduit transfer mechanism For purposes of adding conduit sections 206 to the conduit string, and for detaching conduit sections from the conduit string, there is provided a telescopic conduit transfer mechanism, generally indicated at 242.
• the mechanism 242 includes an outer fixed pipe section 244 of a length greater than the length of the conduit sections 206.
• the outer pipe section 244 is mounted on the high wall bench outwardly of the high wall in a fixed position with its axis aligned with the inward direction of extent of the entry to be mined. Any suitable means may be provided for effecting this fixed positioning of the fixed outer pipe section.
• the pipe is fixedly supported on portable stands 246 at each end.
• the conduit transfer mechanism 242 also includes an inner pipe section 248 which likewise has a length which is greater than the length of the conduit sections 206.
• One end of the inner pipe section 248 is telescopically mounted within an adjacent end of the outer pipe section 244 and there is.provided between the telescoping ends a slip joint which is similar to the slip joint pre ⁇ viously described in connection with Figure 4.
• suitable ball bearings 250 and 252 provided on each section with a stop ring 254, a garlock type of seal 256 and a pair of inflatable seals 258.
• the arrangement with respect to the air circuitry to the inflatable seals 258 is simply and on-off type of circuitry in which air pressure from a suitable compressor 260 mounted on the trailer body 84 is directed through an appropriate pressure regulator 262 so as to provide an available source of 20 psi air.
• a simple two-way valve 264 is provided capable of electrical remote control which in one position communicates the 20 psi regulator with the inflatable seals and in the other position communicates the inflatable seals with atmosphere.
• the arrangement is such that the valve 264 is turned to it second position communicating the seals to atmosphere only during the tramming movement of the continuous minin machine since the sumping movement is not transmitted by the operation of the machine to the conveying system.
• the end of the inner pipe section 248 is provided with a male quick disconnect coupling 266 which mates with the female coupling 208 provided on each conduit section 210.
• the inner pipe section 248 may be provided with a carriage assembly 214 adjacent its outer end and a suitable roller assembly 268 is provided adjacent the end of the outer pipe section 244 to rollingly support the opposite end of the inner pipe section 248 for telescopic movement within the outer pipe section.
• the mode of operation of the conduit transfer mechanism 242 in adding a conduit section 206 to the conduit string is illustrated in the stage views of Figures 7, 8 and 9.
• male coupling 266 is disengaged from the female coupling 208 of the last conduit section 206 of the conduit string.
• the inner pipe section 248 is moved to the left as viewed in Figure 7 until it extends almost entirely telescopically with the outer pipe section 244, as shown in Figure 8, leaving the male coupling 266 on the end thereof spaced from the female coupling 208 of the last conduit section 206 of the conduit string a distance sufficient to move a new conduit section 206 supported at its central portion by a wheeled carriage assembly 214, therebetween.
• the new conduit section is added to the conduit string as shown in Figure 9, by connecting the female coupling 208 thereof with the male coupling 266 and the male coupling 210 thereof with the female coupling 208
• the opposite end of the outer pipe section 244 has a pipe 270 connected thereto which has a central bend therein so as to extend upwardly and outwardly.
• the end of this pipe section connects with the inlet side of a separator assembly, generally indicated at 272.
• the separator assembly 272 includes a front inclined inlet wall 274 (e.g. 45°) which has an opening therein which receives a flanged connection formed on the end of the pipe section 270. Extending upwardly and outwardly from the upper edge of the front wall is an inclined transition top wall 276.
• the inclined transition top wall 276 has a top housing wall 278 connected to the edge thereof which top wall is of generally rectangular configuration.
• the separator assembly 272 also includes a pair of side housing walls 280, extending downwardly from the side edges of the top wall and suitable triangular shaped transition side walls 282 are connected between the leading edges of the side walls 280 and the side edges of the front wall 274: Finally, the rear edges of the top wall 278 and side walls 280 are enclosed by a rear housing wall 284. Extending between the side walls 280 and in engagement with the top wall 278 is a baffle plate 286.
• the upper edge of the baffle plate 28 is spaced inwardly from the forward edge of the top wall 278 in a position such that the particles in the air stream issuing from the pipe section 270 will impinge thereon.
• the baffle plate 286- extends downwardly from its upper edge and in a direction away from the pipe at an angle of approximately 68° with respect to the top wall 278.
• the lower edge of the baffle plate terminates at a point spaced above the lower surfaces of the side walls 280, rear wall 284 and front wall 274. Access to the housing provided by the walls thusfar described may be obtained by an openable and closable hatch 288 in the rear wall.
• a sight panel 290 may also be provided in the rear wall, see Figure 12.
• a hopper section 292 Extending downwardly from the lower edges of the housing is a hopper section 292 in the form of an inwardly and downwardly tapering four-sided prism.
• the lower edges of the hopper section 292 feed to the upper opening formed in a cylindrical housing 294 forming a part of a rotary air lock discharge valve or feeder unit, generally indicated at 296.
• Units of this type are well known and a preferred embodiment is the model #24X22SR produced by Sprout Waldren.
• the unit ' 296 is schematically illustrated in Figures 11 and 12 as including a pocketed rotor 296 which is mounted within the cylindrical housing 294 and driven by the electric motor 300.
• the cylindrical housing 294 includes a lower discharge opening 302, the arrange ⁇ ment being such that as the rotor 298 is rotated by the motor 300, the pockets are filled from the hopper section 292 and are emptied as they pass the outlet opening 302.
• any suitable conveyor arrangement may be provided beneath the rotary valve outlet opening for the purpose of receiving the discharged particles and handling them from that point on.
• a belt-type conveyor 304 is shown extending beneath the trailer bed to receive the discharge from the rotary valve which extends through the trailer bed.
• the conveyor 304 serves to discharge the material on a further belt conveyor 306 extending along the bench at the high wall location.
• one of the side walls 280 of the separator housing has an outlet opening 308 flanged to connect with a pipe assembly 310 which extends from the separator housing to a T-pipe connector, indicated at 312.
• the T-pipe connector 312 has the stem outlet thereof provided with a vacuum relief and by-pass valve mechanism, generally indicated at 314.
• the vacuum relief and by-pass valve assembly 314 includes a cylindrical valve body 316 adapted to mate with the flange of the stem connection of the T fitting 312.
• the valve body 316 is formed with a plurality of annularly spaced apertures for receiving a series of bolts 318 to effect the connection with the stem outlet of the T fitting.
• the central portion of the valve body 316 is provided with a cylindrical recess, as indicated at 320, which forms a relatively thin central end wall 322.
• the end wall has a series of annularly spaced openings 324 formed therein which provide in the end wall a central hub portion 326 and a plurality of spokes 328 as is clearly evident from Figure 14.
• the interior sur ace of the end wall provides a valve seat 330 which is engaged by a disc valve member 332.
• the central portion of the valve member 332 is fixed to one end of a valve stem 334 which slidably engages through a central opening in the hub portion 326 and hence outwardly of the valve body 316.
• the outer end of the valve stem 334 has a fitting 336 fixed thereto which serves to engage one end of a coil spring 338 disposed in surrounding relation to the valve stem 334.
• the opposite end of the coil spring 338 engages a suitable seat formed on the hub portion 326 of the end wall 322.
• Extending from the valve body 316 and fixed thereto by one of the bolts 318 is an elongated standard 340.
• the opposite end of the standard 340 pivotally receives one end of an actuating lever 342 as indicated at 344, the opposite end of which is pivotally connected, as indicated at 346, to the plunger 348 of a solenoid 350.
• the solenoid 350 is carried by the outer end of a standard 352 similar to the standard 340 fixed to the valve body 316 by an opposite bolt 318.
• the central portion of the operating lever 342 is connected to the fitting 336 through a one-way connec- tion bumper 354.
• the valve member 332 is operable to move inwardly from the closed position, as shown, against the bias of the spring 338 when the vacuum pressure conditions within the T fitting 312 reach a predetermined minimal value which is equivalent to that which may cause conduit collapse. This move ⁇ ment will take place without corresponding movement of the operating lever 342 taking place.
• the plunger 348 is moved inwardly which in turn moves the operating lever 342 in a direction to positively engage the valve stem 334 and move the same together with the valve member 332 inwardly so that the valve member 332 is displaced from its seat 330, thus opening the interior of the system to atmosphere irrespective of the vacuum pressure conditions therein.
• the solenoid 350 the system as thusfar described is bypassed.
• the opposite branch of the T fitting 312 is communicated by a pipe assembly 356 to a tangential inlet of a filter assembly, generally indi ⁇ cated at 358.
• the filter assembly may be of any known construction.
• a preferred embodiment is the filter assembly Micropul model #109-10-20 manufactured by U.S. Filter Corporation.
• the bottom apex outlet of the hydrocyclone filter assembly 358 is provided with a rotary airlock valve assembly 360 which is similar to the assembly 296 previously described.
• the upper central air outlet of the filter assembly 358 is con ⁇ nected, as by a pipe assembly 362, to the inlet of the main positive displacement vacuum pump 154.
• the rotary airlock valve assembly 360 extends through the floor of the trailer in a manner similar to that previously described in connection with the assembly.
• a separate conveying system (not shown) for receiving the discharge from the filter assembly can be provided. It is contemplated that this discharge is considerably less than that of the feeder rotary airlock valve associated with the separator, hence the discharge can be separately handled.
• the size of the particulate coal material discharged from the filter will be less than that in the separator and consequently maintaining this material separate from the discharge of the separato is considered desirable.
• FIG. 17 there is shown therein a diagrammatic view of a control panel generally indicated at 364, which contains the various instru ⁇ mentalities enabling an operator at the control station 80 to remotely control the entire system.
• the control panel includes the switches 86-102 by which the operation of the continuous mining machine can be controlled.
• the normal operating cycle of the continuous mining machine 10 is as follows. With the gathering head cylinders 40 set by the switch 94 in a floating position and the auger head cylinders 30 set by the switch 92 in a raised position, sump cylinders 26 are actuated by the switch 90 to effect a forward movement of the sump frame with the auger head assembly 28 and gathering assembly 34 carried thereby into the coal seam.
• the inflatable seal 180 of the slip joint carried by the machine 10 is actuated so as to maintain a 10 psi value thereon. It will be understood that the sumping movement takes place with the track frame 16 in a stationary position. Consequently, during this move ⁇ ment the operator should have the selector switch for the television camera in a position to view the forwardly extending camera so that he will have a view of the seam as the cutting head advances therein along the roof. This will enable the operator to raise and lower the auger head if need be.
• the sumping distance is approximately 18 inches so that at the end of this move- ment the operator then lowers the auger head to the floor again taking care by virtue of the television monitor to insure that* the coal in the seam is removed without digging into the floor.
• all of the electrical motors 32 and 34 are energized as by switches 86 and 88.
• the hydraulic motor 42 for the conveyor 38 is energized by the switch 100.
• the coal cut by the auger head 28 is soon removed from the conveyor 30 and placed in the air conveying system through the inlet 160.
• solenoid 350 is energized as by a switch 374 on the control panel. This has the effect of opening valve member 332 of the bypass valve assembly 314 thus establishing a vacuum air circuit from atmosphere through pipe 356, filter 358, pipe 362 and pump 154 which bypasses and cuts off the vacuum air flow in the entire system leading up to the valve 314.
• the transfer mechanism 242 can now be operated, as aforesaid, to add a new conduit section 206 having a carriage assembly 214 thereon.
• a portable conduit section rack 376 is suitably stationed on the high wall bench.
• a protective structure 378 for the entry opening which likewise can be moved.
• the other block schematically shown in Figure 1 is a portable generator system 380 of conventional design.
• the rear televisio camera In retracting the machine 10 the rear televisio camera is selected for viewing on the monitor set as by actuating switch 382 on the control panel. Retraction is accomplished by reversing the procedures previously described.

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• Engineering & Computer Science (AREA)
• Mining & Mineral Resources (AREA)
• Geology (AREA)
• Life Sciences & Earth Sciences (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Geochemistry & Mineralogy (AREA)
• Mechanical Engineering (AREA)
• Drilling And Exploitation, And Mining Machines And Methods (AREA)
• Selective Calling Equipment (AREA)
• Devices That Are Associated With Refrigeration Equipment (AREA)
• Storing, Repeated Paying-Out, And Re-Storing Of Elongated Articles (AREA)
• Details Of Television Systems (AREA)
• Processing Of Stones Or Stones Resemblance Materials (AREA)

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• 1981
  • 1981-08-03 WO PCT/US1981/001030 patent/WO1983000525A1/en not_active Ceased
  • 1981-08-03 DE DE8181902200T patent/DE3176521D1/de not_active Expired
  • 1981-08-03 JP JP50271981A patent/JPS58501237A/ja active Pending
  • 1981-08-03 EP EP81902200A patent/EP0084530B1/de not_active Expired
  • 1981-08-03 AT AT81902200T patent/ATE30758T1/de not_active IP Right Cessation
  • 1981-08-03 BR BR8109041A patent/BR8109041A/pt unknown
• 1985
  • 1985-10-09 AU AU48446/85A patent/AU581932B2/en not_active Ceased

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