Method of medium and low depth steep coal-bed development
SUBSTANCE: invention concerns mining, particularly the methods of developing bedded mineral deposits sloping at 40-50 degrees to the horizon. The method of medium and low depth steep coal-bed development involves preparation of extraction pillar by drifting belt entry and airway along the bed course, installation chamber with creation of face line slanted against the bed course line at an angle approximately equal to, but not less than the seam dip angle, and mounting of powered support sections in the installation chamber tilted against the face line and bed course, i.e. along the line of dip, coal extraction by a cutter-loader suspended at trolley and safety ropes, maintaining of working face roof by mobile powered support sections shifted following the working face line to the face and to the belt entry direction, and rock pressure control over complete roof collapse. After a powered support section reaching the belt entry it is lifted to the surface and undergoes technical inspection and maintenance works, then it is assembled again in the working face, this time at the junction with airway.
EFFECT: improved efficiency and reliability of development of bedded mineral deposits sloping.
The present invention relates to mining, in particular to methods of mining of bedded deposits of minerals lying at an angle of 40-50 degrees to the horizon.
There is a method of developing a steeply inclined coal seams on the development system "Long poles on strike", including transport and ventilation drifts, mounting the camera at an angle to the strike of the formation, installation of shields at an angle to the line of the stope and perpendicular to the line of fall of the reservoir, the hollow coal cleaning harvester hanging on the traction and safety ropes, and gravity transport of coal along the face . The disadvantage of this method is that during the development of steeply inclined strata of the shields during their advancing slides along the lines of drop formation. Because of this, they have to rule in each cycle, shifting, thereby compensating the amount of slipping, and this requires a considerable investment of time. In connection with this dramatically reduces the efficiency of the development steeply inclined seams this way.
For the prototype accepted way to develop steeply inclined seams of medium thickness and thin, including the preparation, excavation and post-conducting transport and ventilation drifts along the strike of the formation, mounting the camera with the formation of the slaughtering of the seam coal under the m to transport and ventilation drifts - and the installation of sections of powered roof supports at an angle to the lines of the face and stretch reservoir dredging coal cleaning harvester and maintenance of the roof stope sections of the mobile mechanized roof supports, movable after podvigina line stope on the bottom and side ventilation drift, and management of mountain pressure complete collapse of the roof .
The disadvantages of the prototype are:
- the narrow scope of the method, limited to reservoirs with stable coatings as applied shield support due to their design, cannot provide a more complete tightness of the roof; this entails the occurrence of accidents at the break of roof rocks in the workspace stope;
- in the space between the mechanized roof supports are electrical cables and hydraulic hoses, high and low pressure; even when the reservoir with sustainable roofing is very likely separate wood thrown rocks that can damage the cable or the sleeve in the space between the supports, and it is also an emergency situation;
- low maneuverability of the shields, due to the design features of the device, shifting the racks of each section.
These drawbacks reduce the effectiveness of the development steeply inclined coal seams with what edstam complex mechanization.
The aim of the invention is to increase the efficiency of development steeply inclined coal seams of medium thickness and thin through the use of gravity to increase maneuverability lining and reduce the slope of the line stope in the direction of working of the array.
This objective is achieved in that in the method development steeply inclined coal seams of medium thickness and thin, including the preparation, excavation and post-conducting transport and ventilation drifts along the strike of the formation, mounting the camera with the formation of the slaughtering of the seam at an angle to the transport and ventilation drifts and installation of sections of powered roof supports at an angle to the lines of the face and stretch reservoir dredging coal cleaning harvester and maintenance of the roof stope sections of the mobile mechanized roof supports, movable after podvigina line stope on the face and in the direction of one of the drifts, line stope give inclination towards working the array is approximately equal to, but not less than the corner of the bedding layer, sections of the mobile mechanized roof supports move in the direction of transport of drift, released on the transport passage of the shields after maintenance installed in the upper part of the stope on pairing it with ventilati is authorized by the roadway, and the angle at which the section of powered roof supports are mounted relative to the line of strike of the seam, take the direct.
The essence of the method is illustrated by scheme of arrangement of equipment in a mining face and the adjacent openings shown in the drawing.
The method can be implemented as follows. In the mining field is steeply inclined coal seam average power or subtle prepare extraction column along the strike of the seam holding the vehicle 1 and vent 2 drifts and mounting chamber 3 at an angle to the strike towards the subsequent working of the array is approximately equal to, but not less than the corner of the bedding layer. In mounting the camera along the line of the stope mount section of powered roof supports 4, directing them to the line of fall of the layer (perpendicular to strike) with the ability of the proposed shifting in the direction of transport of the roadway, and Shearer 5, able to hit the coal bilateral (chelnokova) scheme and the associated rope through the block 6 with the winch 7, installed on the ventilation drift 2. In the transport passage 1 mount the vehicle, for example a conveyor belt 8, and a mobile hopper-loader 9 - mate drift 1 with clearing face.
Excavation of coal is carried out in the following order. Shearer 5 suspended on traction and load the additional ropes, when moving from the transport passage 1 to the vent 2 provides breaking strip coal from the array. The broken coal is gravity fed to a pair stope with the transport passage 1, enters a conveyor hopper 9 and reloaded onto the conveyor belt 8. After the harvester as it goes up perform shifting of the support units 4 in the direction of transport of the roadway, i.e. dip, and on the face. After the release of the Shearer 5 on vent drift 2 complete shifting of the remaining shields 4 and begin the notch of the next strip of coal during movement of the Shearer 5 from exhaust passage 2 to the vehicle 1. This shifting of the support units 4 carry out bottom-up, starting with the third of the ventilation drift, etc.
Naturally, when the movement of the sections on the longwall face and in the direction of the transport passage of the lower section at some point will not be the equipment. Her unload and transport the roadway 2 and then give to the surface for repairs or maintenance, after which the shield section set in a mining face, but in its upper part at the interface with the ventilation drift.
Thus, by reducing the slope of the line stope to the line stretch seam appeared who makes sure the orientation of the shields on the line of fall of the layer (perpendicular to the stretch of the reservoir). But due to the orientation of the shields on the line of fall of the reservoir gravity is summed with the efforts of jacks shifting and shield section moves easier and faster, i.e. increases its maneuverability. This, in turn, allows to increase the speed of movement of the harvester, i.e. its performance for the blasting of coal. Due to more dense installation of shields along the line of the stope at a higher rate tightening of the roof, which greatly reduces the likelihood of penetration of the roof rocks in the workspace of the face, i.e. increases reliability of the stope. In addition, this way you can work out the reserves that lie between faults, because there is no regulated the length of the stope. Therefore, the scope of the method can be extended. All this contributes to the efficiency of development steeply inclined coal seams of medium thickness and thin, i.e. achieving the target.
To implement this method requires special shearers is capable of dredging coal bilateral (chelnokova) scheme. The layout of such a harvester is shown in the description of the technical solution . The use of the harvester such composition in conjunction with the reduction of the slope angle of the face relative to the stretch of the reservoir which allows you to exclude operations notch niches in the upper part of the face, and at the bottom. And it also not only increases the reliability of stope, and development efficiency.
Sources of information
1. Zhigalov M., USSR author's certificate S.A. Technology, mechanization and organization of underground mining: Textbook. for universities - M.: Nedra, 1990, s-285, RIS (similar).
2. The way the development of steep coal seams of medium thickness and thin. RF patent №2285122, 7 AS 41/18, publ. 2006, bull. No. 28 (prototype).
3. Uzkozahvatnoj harvester to extract coal from the steeply inclined strata. RF patent №2235202, 7 AS 27/02, Publ. 2004.08.27, bull. No. 24.
Method development steeply inclined coal seams of medium thickness and thin, including the preparation, excavation and post-conducting transport and ventilation drifts along the strike of the formation, mounting the camera with the formation of the slaughtering of the seam at an angle to the transport and ventilation drifts and installation of sections of powered roof supports at an angle to the lines of the face and stretch reservoir dredging coal cleaning harvester and maintenance of the roof stope sections of the mobile mechanized roof supports, movable after podvigina line stope on the face and in the direction of one of the drifts, characterized in that the line stope give inclination towards working array is approximately equal to but not least , the corner of the bedding layer, the section re vignau mechanized roof supports move in the direction of the transport passage, released on the transport passage of the shields after maintenance installed in the upper part of the stope on pairing it with the ventilation drift, and the angle at which the section of powered roof supports are mounted relative to the line of strike of the seam, take the direct.
SUBSTANCE: invention concerns mining and can be applied in combined development of kimberlitic pipe deposits by deep open pits. The method involves pit levels stripping, conduction of underground and open works, mined rock transportation by haulage benches and underground haulage courses. The pit edge below the combined additional development face is made without haulage benches. At first transportation in the combined additional development zone is performed by temporary declines, which are eliminated later, the further the mined rock is transported by underground haulage courses, which are dug before the beginning of temporary decline elimination.
EFFECT: reduced overburden volume within open-pit edge and overburden work cost.
5 cl, 1 ex, 2 dwg
SUBSTANCE: invention concerns mining and can be used in preparing primary collapse-proof roof caving in permafrost environment. The method involves drifting of belt entries and airways, digging of installation chamber at extraction pillar border with further installation of a powered mining complex and face caving of minerals. A vibration set is installed on the surface above the mined-out space, with offset to the seam dip direction at the value of L defined by the formula: L=H·tgα, where: H is a distance from the surface to the centre of mined-out space, m, α is a seam dip angle, and along the complex a cutting-off support is constructed.
EFFECT: improved mining work safety and prevention of powered complex failure.
SUBSTANCE: invention concerns mining and can be applied in dragging of tiered gravel deposits. The method involves combined dragging of valley placer tier together with bench and bench hillside placer sands, which are developed, shifted and laid by earth-moving machines to a surface of valley placer tier prepared for dragging in advance.
EFFECT: higher degree of deposit development.
SUBSTANCE: invention concerns mining and can be applied in protection of surface and/or underground objects against undermining. The method involves defining the border 4 of the protected zone (PZ) 5 of object 2 in the form of geometrical position of the points located at distance equal to the width b of safety berm from outline 3 of object 2 and at distance of ri and rj along the given radius-vectors and from the central point O fixed within the border 4. The radius-vectors cross vertical axis (VA) passing through the given central point O. Then a side surface (SS) of the protected zone (PZ) 8 is formed by generating lines (GL) 9 oriented along the mentioned radius-vectors and and drawn from the border 4 under the displacement angles of alluvium (AS) 10 and parent rock (PRS) 13 solids, defined for each direction of and . Further from a crossing line of the SS with roof (RS) 13 and ground (GS) 15 surfaces of a mineral deposit (MD) 6 borders 16 and 17 of the protection pillar (PP) are defined against the mentioned RS and GS in the form of a geometrical position of the points located at distances and along and directions from the VA to the border 16 and at distances and to the border 17, while the values of these distances are defined by the functional dependencies with account to displacement angles of AS and PRS, dip angles MD RS and GS and the ground surface of AS, distances ri and rj from the VA to the border 4 at the respective directions, depth of MD RS and GS occurrence, alluvium thickness under the PZ and VA plane, height marks difference at the PZ base (or day surface) in the central point O on the VA and on points i and j where respective radius-vectors and cross border 3. Functional dependencies are defined according to the geometrical constructions and have the one form for PP area 1 at the downslope of the MD 6 strike line (SL) 7 crossing VA, and another form for the upslope area of SL 7.
EFFECT: ensuring sufficient safety of an object protected against undermining in any direction.
4 dwg, 2 ex, 1 tbl
SUBSTANCE: method includes extracting coal pillars by conducting shrink stoping from pit wall to mine-field boundary and leaving supporting coal pillars between shrink stoping. A coal pillar is divided into blocks; supporting coal pillars are left between the blocks so that the width of each exceeds the maximum width of a pillar and when it is reduced, destruction of pillar by rock pressure occurs. The length of shrink stoping is defined according to the mathematical expression.
EFFECT: higher stiffness of shrink stoping and labour efficiency of conducting thereof.
3 cl, 3 dwg
SUBSTANCE: method includes the subterranean development of field with use of the chamber systems with the solid stowing and following refinement of the ore mass at the ore mill in the following stages. At the beginning, the ore recovering from the first-stage chamber (4) is performed. The ore pickings from the first-stage chamber (4) are processed to concentrate and final tailings. The tailings are processed to pellets. From the pellets, two workflows are formed, the first pellet flow is exposed to the heap leaching, and the second pellet flow is conditioned until the required mechanical characteristics. On completion of the leaching process, the pellets of the first workflow are mixed with binding agent and water, to receive the fill mixture, the fill mixture is sent to the first-stage chambers (4) until filling; after the fill mixture is solidified, the ore recovering from the second-stage chamber (5) is performed, the chamber's bottom is strengthened and prepared with the solidifying mixture which is prepared using the waste from the heap leaching; pellets of the second workflow are sent to the chamber with their following subterranean leaching.
EFFECT: comprehensive and complex development of minerals and ecologic-economic effects are provided.
4 cl, 1 dwg
SUBSTANCE: invention relates to geotechnology and can be used in subterranean leaching the metals and ores, particularly to preparing ore bodies in deposit for leaching. The method includes the explosive loosening the ore deposits and supplying the process liquor. Explosion of the blast hole rings (11) is performed to shake the central solid of the ore body, and in the upper ore body, the peripheral perforations with branching cracks (10) are formed by pin-point explosion, to inject solutions.
EFFECT: invention provides even pattern sprinkling of the solid, even distribution of the leaching solution in its size at the minimal volume of preparatory first workings without ore shrinkage.
FIELD: mining engineering.
SUBSTANCE: excavation method of alluvial deposits includes preliminary preparation of riffled opening and disruption module, preliminary mechanical breakage and fluid wash of formation in mine face, its distillation and direction into riffled opening, free-flow formation water transportation with its free slacking in transportation process. Following breakage, disintegration and supplying on formation processing are made consequently in disintegration module of technological complex, at that formation breakage is made under the influence of surface-active environment - water and moving with periodical vertical deepening of disintegrating scoop with cone bottom, and formation disintegration and carrying out of dead ground into barrow are made with moving of module fixed at the traverse pier with disintegrated scoop before carrying of prepared formation on processing complex conveyer.
EFFECT: effectiveness improvement of excavation with intensification of the formation breakage process with complex mechanical-and-physical properties while alluvial deposits working.
6 dwg 2 cl
FIELD: mining engineering.
SUBSTANCE: working method includes drifting of preparatory breakoffs, slicing of stope inclined strips, inclined according to sloping angle of ore body, beginning with hanging layer directed to bottom wall, ore breaking with explosive holes. Breakage, transportation and formation releasing from rocky bands in ore body are carried out separately through the flanking debris chute. Previous slice after corresponding preparation is filled with weak solid stowing, which provides hardiness of its walls, at that interblock pillars are eliminated with leaving of free technological space between ore mining face roof and horizontal surface of previous slice filling mass. At first one excavates low layer of the block with entry ways at whole its length, fills worked entry ways with hard solidifying mixture in particular order with preliminary armature setting up, so that after the complete excavation of the layer in-situ concrete slab is appeared. It performs the functions of ceiling while debugging of underlying block reservoir.
EFFECT: effectiveness improvement of ore excavation and safety of stopes working.
FIELD: coal mining.
SUBSTANCE: method is based on debugging room-and-pillar system and includes mine section treatment in layer near roof of the seam with transport 1 and ventilation 2 workings with sequential installation of extraction chambers from transportation 1 till ventilation 2 working in descending order. At that roof and rim of excavating chambers 5.20 are fixed with anchoring steel polymer shoring. Coal excavation is carried out with frontal function combine 4 in interchamber pillars 21 by diagonal entry way 8,10,22,23, directed at the angle 120...135 degrees to axle of excavating chamber from the both sides. Entry way roof is fixed with anchor shoring. Broken-down coal transportation to transport working 1 is carried out by self-propelling car 6. Between entry ways 8,10,13 one leaves under breaking pillars 8,15. After the excavation of several entry ways in layer at the roof of the seam by the same combine 4 one deepens excavating chamber 20 till seam ground and take out end entry way 12 under corresponding entry way 8 in layer at roof of the seam, i.e. under anchoring shoring. After entry way excavation in layer at seam ground combine is returned to chamber ground in layer at roof of the seam and excavation of several entry ways in that layer is carried out. Then the chamber is deepened till layer ground and several entry ways are excavated in the layer at seam ground and so on. Axis slope angle of excavating chamber, entry ways, transportation and ventilation workings and ramps to the horizon are taken no more admissible for applied mechanised systems for scouring works, and entry way length is no more than combine length. Entry ways, worked from the next chamber side in one interchamber pillar, are located in checkerboard order as to entry ways, worked from the side of previous chamber.
EFFECT: improvement of working effectiveness and changing of transport means of continuous action on means of cycling action.
2 cl, 3 dwg
FIELD: engines and pumps.
SUBSTANCE: heading machine contains a frame supporting the running gear, an actuator reduction gear. A rotary actuator is fitted on the output shafts of the said reduction gear and consists of a cross-piece with four beams provided with loading scoops, the supplied loading ladles, a borer and starting borer, an electric equipment and hydraulic system. A space with volume not less than that of the bucket is arranged inside every rotary actuator cross-piece beam. All the said spaces communicate, via inlets and outlets, by means of a system of pipes, the inlets and outlets incorporating shut-off valves. The spaces of two adjacent cross-piece beams are filled with high-density a liquid. Note also, that an independent pump with a position pickup is built in the space of every beam, the said pickup being coupled with the cross-piece beam inlet and outlet shut-off valves.
EFFECT: automatic balancing of the rotary actuator cross-piece and ruling out its deviation from rectilinear movement.
SUBSTANCE: invention relates to the mining and can be used in mining machines for coal cutting and breaking the soft ores, e.g. kimberlite. The movable operating element of the mining machines contains the screw conveyer with the inclined spiral cutting strip consisting of the separate sections projecting above the screw conveyer's blade. The section of the spiral cutting strip are placed alternately to each other at the distance L equal to 0.3D of the angle diameter D of the loosened fragment, have the width B equal to D - the angle diameter D of the loosened fragment. The angle of inclination to the contour line of the upper side of the breaking segment is taken as 7°, and the angle of inclination to the contour line of the inner side of the breaking segment is taken as 47°.
EFFECT: area of application of machines for coal cutting and soft ore breaking is broadened.
FIELD: mining; apparatus for making arched tunnels in underground mining of minerals.
SUBSTANCE: machine includes frame whereon an undercarriage and working element drive gearbox are mounted together with a rotary working head being attached to output shafts of said gearbox. The working head consists of borer, pitching borer, cross element, each end of its arms having a loading bucket with a bottom and sidewalls, and conveyer. The front face bottoms of two loading buckets positioned on opposite arms of said cross element are slopped forward with respect to the machine displacement vector, and those of the other buckets - slopped backward with respect to the same vector.
EFFECT: cleaning-up with the full engagement of the bucket cross-section area; reduction of impact loads for the cross element; reduction of heating and increased wear of the bearings in the working head drive gearbox of the machine.
FIELD: mining; apparatus for making tunnels in underground mining of minerals.
SUBSTANCE: machine includes undercarriage representing a frame whereon caterpillar trucks are attached and trunnion axes of a working head gearbox together with a rotary working head, loading buckets, berm mills, cutting drums, gathering blades, conveyer and protection cowl mounted on supports of said frame. Hydraulic lift cylinders of the working head gearbox are attached to this frame, rods of said cylinders are attached to the working head housing and all rotating parts of said rods are set into bearings equipped with a force lubrication system. The lubrication system includes pump, pressure pipeline, manifolds and system of distribution tubes leading to gear shaft bearings of the gearbox. The undercarriage frame has two tightly closed cavities, wherein a pressure line between the pump and manifolds is positioned being made in the form of coils. Both cavities of the frame are filled with cooling fluid.
EFFECT: cooling of lubricating fluid within the lubrication system; increasing the life of gear shaft bearings of the machine gearbox; decreasing the ambient air temperature; enhancement of working conditions for the operating staff.
FIELD: mechanical engineering, particularly in mineral resource industry.
SUBSTANCE: heading-and-winning machine comprises chassis, bench unit, upper cutting device, conveyer, planetary-and-disc executive tool, displaceable rotation reducer, two executive tool reducers and two distribution reducers. The distribution reducers include body with central starting borers and two arms provided with intermediate and output shafts. Main cutting discs are installed on output shafts. Additional cutting discs are mounted on intermediate shafts so that cutting planes thereof are shifter with respect to main cutting disc planes and discs are partially overlapped one with another. Main and additional cutting disc axes are in single plane transversal to face. Main cutting discs are as close as possible to bench unit.
EFFECT: extended functional capabilities and improved service performance.
FIELD: cutting-loading machines for explosion-free cutting of deposits having complex structures.
SUBSTANCE: mining machine comprises frame with movement mechanism, boom with cutting crown and loading device. Crown has rock-cutting tools. Loading device is made as inclined rotary hoisting table with gathering arms and central drag conveyor. Frame may rotate with loading device installed thereon and with unloading conveyer. Cutting crown may rotate about axis of rotation with respect to longitudinal boom axis through φ angle defined in dependence of rock hardness. Rock-cutting members are made as disc cutters reinforced by hard-alloyed pins and freely rotating in staggered order around replaceable pins.
EFFECT: increased operational efficiency due to extended field of practical usage thereof and increased service life of rock-cutting members.
FIELD: mining, particularly mining machinery manufacturing.
SUBSTANCE: cutter-loader comprises conveyer, loading crane with lugs, hitch to connect loading crane with conveyer. The hitch is arranged over loading crane and includes two rings having inner diameters exceeding conveyer width. The rings are coaxial one to another and connected with each other so that the rings may perform mutual rotation. One ring is fixed to conveyer. Another ring has webs provided with vertical slots and enclosing loading crane. The webs are connected to loading crane by means of horizontal axis passing under loading crane through vertical web slots and loading crane lugs.
EFFECT: increased loading crane stability in transversal direction and improved reliability of loading crane connection with cutter-loader conveyer.
FIELD: mining, particularly coal plows to be moved by means of hauling chains.
SUBSTANCE: guiding device section comprises two overlapped guiding channels for chain receiving, upper guiding strip and lower guiding beam, as well as lower sliding guide used for plow orientation. The channels are separated one from another with molded spacing slide. Upper guiding channel is closed with front wall including guiding strip and passing into guiding beam. Formed between guiding beam and sliding guider is slot orifice for plow guider hook or plow blade receiving. Created in front wall are receiving cuts to arrange drag-bars for adjacent plow guiding device sections connection. Front wall with guiding strip, guiding beam, as well as receiving cuts and rear wall including sliding guider, are made of integral mold extending along guiding device section.
EFFECT: decreased assemblage costs, reduced number of molds to be manufactured.
10 cl, 5 dwg
FIELD: mining, particularly production plants with console control of production machine cutting horizon, particularly for coal deposit mining plough.
SUBSTANCE: connection console comprises hinge bearing connection for hinged head of console cylinder arrangement. The console also has fork-like console connection shifted with respect to hinge bearing connection and adapted to secure head part of console bar by means of hinge pin. Fork-like console connection has two parallel elbows having orifices for hinge pin receiving. Inner sides of elbows are spaced apart and are opposite one to another. The elbows are connected to each other at base. Inner sides of each elbow pass into elbow edge through chamfer.
EFFECT: decreased wear.
9 cl, 2 dwg
FIELD: mining, particularly machines which completely free the mineral from the seam, namely coal mining machines with auger executive tools adapted for underground mineral mining.
SUBSTANCE: mining machine comprises hydraulic driving mechanism, drive, reducers, height-adjustable augers and loading flaps. The machine has additional executive tool made as a number of cutting discs connected to single vertical shaft and arranged in front of augers in machine movement direction. Cutting disc radius is equal or greater than auger width.
EFFECT: improved coal grade of quality.
FIELD: mining industry.
SUBSTANCE: combine has main body, drive, feeding mechanism and executive tool, which is made in form of drum with horizontal rotation axis. It is placed at non-straight angle to longitudinal conveyor axis and is turned in horizontal plane in direction providing for displacement of trajectory of coal output towards conveyor. Drum has cylinder, on outer surface of which in certain order cams with cutters are fixed. Inside the cylinder three or five electric engines are placed. These are inserted in parallel in recesses of fixed body with inner teeth of sun ring of planetary gear, which interact with three satellites. Output shafts of three or five electric engines interact with one common cog-wheel. It is placed coaxially with planetary gear and engaged with it by torsion shaft having two cog tail pieces. One of tail pieces interacts with inner slits of wheel hub, and another interacts with teeth of three satellites of planetary gear. Mechanism for hoisting drum mechanism along bed massive has handle raising jack and handle with horizontal rotation axis placed in horizontal plane at non-straight angle to conveyor axis and turned to direct displacement of executive tool towards pit-face. Shoes of stability mechanism for combine are provided with reverse clamps for shelves on front pit-face and back dump sides of conveyor. Back support of conveyor on soil is placed on dump end of inter-section beams. Combine feeding mechanism has drive for chainless feeding system and leading sprocket. Sprocket interacts with fingers of conveyor rack. Drive is placed beyond handle of executive tool and is made in form of separate electric engine with reducer of self-braking worm type. Engagement of sprocket with fingers is guaranteed by reverse clamp of reducer engaging back planes of conveyor rack carrying these fingers. In method for loading coal on conveyor, drum rotation axis in plane around vertical axis is turned in certain direction to turn trajectory of coal towards conveyor. Movement of mining drum along conveyor is performed first along ceiling, and then along soil along coal output direction while providing for cleaning of soil in direction of frontal movement of conveyor to pit-face.
EFFECT: lesser dimensions, lesser mass, higher quality of operation.