E21CMINING OR QUARRYINGThis subclass covers methods or apparatus specific to mining or quarryingThis subclass does not cover, even though they may be disclosed only for mining or quarrying, drill bits, bore reamers, core taking devices, drilling pipes or rods, handling, racking or connecting arrangements for drilling pipes or rods, counterboring or enlarging drilled holes, flame drilling, or other drilling apparatus, which are covered by subclass E21BIn this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme. E21C25/00Cutting, Slitting, Dislodging E21C25/00Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam dislodging machines with slitting means E21C27/02, E21C27/10, E21C27/18 E21C25/02Machines slitting solely by one or more percussive tools moved through the seam E21C25/04Cutting crowns or other tools percussion drill bits E21B10/36 E21C25/06Machines slitting solely by one or more cutting rods or cutting drums which rotate, move through the seam, and may or may not reciprocate E21C25/08Mountings for the rods or drums E21C25/10RodsDrums E21C25/14with equipment for cleaning the slit associated with cutter chain machines E21C25/50 E21C25/145Cowls E21C25/16Machines slitting solely by one or more rotating saws, cutting discs, or wheels E21C25/18SawsDiscsWheels E21C25/20Machines slitting solely by one or more reciprocating sawing implements or reciprocating cutter chainsShaker conveyors with cutting means E21C25/22Machines slitting solely by one or more cutter chains moving unidirectionally along jibs E21C25/24with flat jibs only E21C25/26with curved jibs only E21C25/28Chains or chain guides E21C25/30Chain guides E21C25/32specially adapted for curved jibs E21C25/34Chains E21C25/36Couplings for links E21C25/365allowing the bending into at least two planes chains for conveyors which are allowed to bend into at least two planes B65G17/385 E21C25/40having links with integrally formed picks E21C25/50with equipment for cleaning the slit associated with rotary-rod or rotary-drum machines E21C25/14 E21C25/52Machines incorporating two or more of the slitting means according to groups E21C25/02, E21C25/06, E21C25/16, E21C25/20 and E21C25/22 E21C25/54Slitting by unguided cutter cables or cutter chains, or by unguided tools drawn along the working face by cables or the like dislodging by planing means E21C27/32; propulsion by haulage cables E21C29/14 E21C25/56Slitting by cutter cables or cutter chains or by tools drawn along the working face by cables or the like, in each case guided parallel to the face, e.g. by a conveyor, by a guide parallel to a conveyor pressing the conveyor equipped with tools towards the working face E21C35/14 E21C25/58Machines slitting by drilling hole on hole E21C25/60Slitting by jets of water or other liquid picks with arrangements of fluid-spraying nozzles E21C35/187; distribution of spraying fluids in rotating cutter-heads E21C35/23 E21C25/62Machines for making slits approximately perpendicular to the seams either level with, or above or below the level of, the machine E21C25/64Slitting machines guided solely by hand and either carried by hand or mounted on supports hand-held power-operated tools E21C37/22 E21C25/66Machines for making slits with additional arrangements for drilling E21C25/68Machines for making slits combined with equipment for removing, e.g. by loading, material won by other means slitting machines combined with planing means E21C27/18; removing chippings E21C35/20 E21C27/00Machines which completely free the mineral from the seam E21C27/01specially adapted for removing overhanging coal E21C27/02solely by slitting rods, drums, for same E21C25/10; saws, discs, wheels E21C25/18; chains, chain guides, for same E21C25/28 E21C27/04by a single chain guided on a frame with or without auxiliary slitting means E21C27/06with a slewing frame E21C27/08with additional means for cutting the mineral into blocks E21C27/10by both slitting and breaking-down E21C27/12breaking-down effected by acting on the vertical face of the mineral, e.g. by percussive tools E21C27/122with breaking-down members having a striking action E21C27/124with rotatable cutters provided with breaking-down members E21C27/126with slitting and breaking-down members situated in parallel on an intermediary level E21C27/128with breaking-down members functioning on the slitting level E21C27/14breaking-down effected by force or pressure applied to side of slit, e.g. by wedges breaking-down by means inserted in boreholes E21C37/00 E21C27/16with means for both slitting and breaking-down E21C27/18by both slitting and planing E21C27/20Mineral freed by means not involving slitting E21C27/22by rotary drills with breaking-down means, e.g. wedge-shaped drills , i.e. the rotary axis of the tool carrier being substantially perpendicular to the working face, e.g. MARIETTA-type similar machines for tunneling E21D9/102 E21C27/24by milling means acting on the full working face , i.e. the rotary axis of the tool carrier being substantially parallel to the working face similar machines for tunneling E21D9/1026 E21C27/26by closely adjacent cutter chains acting on the full working face E21C27/28by percussive drills with breaking-down means, e.g. wedge-shaped tools E21C27/30by jaws, buckets or scoops that scoop-out the mineral E21C27/32by adjustable or non-adjustable planing means with or without loading arrangements by percussed planing means E21C27/46 E21C27/34Machine propelled along the working face by cable or chain E21C27/35Ram-ploughs E21C27/36Machine self-propelled along the working face E21C27/38Machine stationary while planing in an arc E21C27/40Machine and its planing tool making alternative step-wise movements along the working face E21C27/42combined with scraper or collector box E21C27/44Planing knives mining picks E21C35/18 E21C27/46by percussed planing means E21C29/00Propulsion of machines for slitting or completely freeing the mineral from the seam E21C29/02by means on the machine exerting a thrust against fixed supports E21C29/04by cable or chains E21C29/06anchored at one or both ends to the mine working face propulsion using fixed racks along which the machine is running E21C29/02 E21C29/08Anchoring arrangements for anchoring of conveyors only E21F13/00 E21C29/10Cable or chain co-operating with a winch or the like on the machine E21C29/12Machines propelled by thrust or pull against a part alternately anchored to and released from a cable or chain E21C29/14by haulage cable or chain pulling the machine along the working face E21C29/145Means for tensioning the haulage chains or cables E21C29/16Winches or other means for pulling cable or chain winches in general B66D E21C29/18Coupling and uncoupling machine to cable or chain E21C29/185with coupling or uncoupling of the machine at will E21C29/20with safety devices operating in the event of breakage of the cable or chain E21C29/22by wheels, endless tracks or the like propulsion using fixed racks along which the machine is running E21C29/02 E21C29/24Trucks carrying the machine while working E21C29/26with means for adjustably positioning the machine on the truck E21C29/28adjusting the height of the whole machine E21C31/00Driving means incorporated in machines for slitting or completely freeing the mineral from the seam E21C31/02for cutting or breaking-down devices E21C31/025by another slitting or extracting member E21C31/04imparting both a rotary and reciprocating motion E21C31/06actuated by an endless cable or chain E21C31/08for adjusting parts of the machines E21C31/10for slewing parts of the machines E21C31/12Component parts E21C33/00Trucks or other devices for transporting machines for slitting or completely freeing the mineral from the seam E21C33/02with equipment for loading or unloading the machine on to or from the truck E21C33/025the unloaded machine remaining connected to the transport vehicle E21C35/00Details 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 E21C35/02Locking equipment for slewable parts E21C35/04Safety devices operating in the event of breakage of a haulage cable or chain E21C29/20 E21C35/043Protection against overload during transfer of machines for slitting or completely freeing the mineral from the seam E21C35/046Protection of cables or pipes for supplying power E21C35/06Equipment for positioning the whole machine in relation to its substructure E21C35/08Guiding the machine E21C35/10by feelers contacting the working face E21C35/12along a conveyor for the cut mineral E21C35/125Means for inclining the conveyor E21C35/14Equipment for pressing the conveyor towards the working face E21C35/16by making use of the timbering, filling, or other supports E21C35/18Mining picksHolders therefor planing knives E21C27/44 ; pick-like bits for milling stone like materials B28D1/186 E21C35/183with inserts or layers of wear-resistant material drill bits with wear-resistant parts E21B10/46 E21C35/1831Fixing methods or devices E21C35/1833Multiple inserts E21C35/1835Chemical composition or specific material E21C35/1837characterised by the shape E21C35/184Reversible picks, i.e. having two working ends, one operating, the other in reserve E21C35/186using a locking piston actuated hydraulically, e.g. by spraying-fluid pressure E21C35/187with arrangement of fluid-spraying nozzles supply of fluid to the nozzles E21C35/22 E21C35/188characterised by adaptations to use an extraction tool E21C35/19Means for fixing picks or holders E21C35/191for fixing holders E21C35/193using bolts as main fixing elements E21C35/1933the picks having a cylindrical shank E21C35/1936the picks having a square- or rectangular-section shank E21C35/197using sleeves, rings or the like, as main fixing elements E21C35/20General features of equipment for removal of chippings, e.g. for loading on conveyor E21C35/22Equipment for preventing the formation of, or for removal of, dust picks with arrangement of fluid-spraying nozzles E21C35/187; removing dust while drilling E21B21/011 E21C35/223Equipment associated with mining machines for sucking dust-laden air from the cutting area, with or without cleaning of the air E21C35/226Control valves for the spraying liquid used in dust suppression systems E21C35/23Distribution of spraying-fluids in rotating cutter-heads E21C35/24Remote control specially adapted for machines for slitting or completely freeing the mineral control in general G05 E21C37/00Other methods or devices for dislodging with or without loading breaking-down by means inserted in slits E21C27/14 E21C37/005by projectiles E21C37/02by wedges E21C37/04by devices with parts pressed mechanically against the wall of a borehole or a slit E21C37/06by making use of hydraulic or pneumatic pressure in a borehole E21C37/08Devices with pistons, plungers, or the like, pressed locally against the wall of the borehole E21C37/10 takes precedence E21C37/10Devices with expanding elastic casings E21C37/12by injecting into the borehole a liquid, either initially at high pressure or subsequently subjected to high pressure, e.g. by pulses, by explosive cartridges acting on the liquid slitting by jets of water E21C25/60; blasting by explosives F42D E21C37/14by compressed airby gas blastby gasifying liquids E21C37/16by fire-setting or by similar methods based on a heat effect drilling by use of heat E21B7/14 E21C37/18by electricity E21C37/20by ultrasonics E21C37/22Hand tools or hand-held power-operated tools specially adapted for dislodging minerals slitting machines guided solely by hand E21C25/64 E21C37/24Pick hammers pneumatic hammers in general B25D; percussion drilling E21B1/00 E21C37/26Chisels or other cutting tools not mentioned before E21C39/00Devices for testing in situ the hardness or other properties of minerals, e.g. for giving information as to the selection of suitable mining tools E21C41/00Methods of mining or quarryingOpen-pit miningLayouts therefor methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells E21B43/00 E21C41/00Methods of underground or surface mining E21C45/00 takes precedenceLayouts therefor for peat E21C49/00 E21C41/16Methods of underground mining winning machines therefor E21C25/00 - E21C39/00Layouts therefor E21C41/18for brown or hard coal E21C41/20for rock salt or potash salt E21C41/22for ores, e.g. mining placers E21C41/24for oil-bearing deposits E21C41/26Methods of surface mining machines for obtaining, or the removal of, materials in open-pit mines E21C47/00Layouts therefor E21C41/28for brown or hard coal E21C41/30for ores, e.g. mining placers E21C41/31for oil-bearing deposits E21C41/32Reclamation of surface-mined areas machines or methods for treating or working soil for agricultural purposes A01B77/00, A01B79/00; machines for back-filling E02F5/22 E21C45/00Methods of hydraulic miningHydraulic monitors E21C25/60 takes precedence E21C45/02Means for generating pulsating fluid jets E21C45/04by use of highly pressurised liquid E21C45/06by use of compressed gases E21C45/08Automatic or remote control of hydraulic monitors E21C47/00Machines for obtaining or the removal of materials in open-pit mines obtaining peat E21C49/00 E21C47/02for coal, brown coal, or the like dredgers or soil-shifting machines in general E02F E21C47/04Conveyor bridges used in co-operation with the winning apparatus E21C47/06Cableway conveyors used in co-operation with the winning apparatus underground hauling E21F13/00 E21C47/08Devices for cutting-out partings, e.g. layers of sand between seams of coal E21C47/10for quarrying stone, sand, gravel, or clay E21C49/00Obtaining peatMachines therefor treating peat C10F E21C49/02by excavating E21C49/04by digging in the form of peat sods E21C50/00Obtaining minerals from underwater, not otherwise provided for suction dredgers or component parts thereof E02F3/88; equipment for conveying or separating excavated material E02F7/00; dippers G01N1/12 E21C50/02dependent on the ship movements vessels or floating structures adapted for special purposes B63B35/00 E21C51/00Apparatus for, or methods of, winning materials from extraterrestrial sources cosmonautics B64G