RU2134791C1 - Process of uninterrupted winning of coal by clearing combine - Google Patents

Abstract

FIELD: development of thick and medium-thick seams of coal with stable and unstable roof in breakage faces equipped with powered supports with sliding cutting noses. SUBSTANCE: process of uninterrupted winning of coal includes development of seam with separation into coal bands by thickness. Combine makes cut at distance not less than its entire length from conveyer working in section of long wall with formation of coal pillar wedge-shaped in plan view. After cutting of screws of combine into whole depth of cut screw frontal by advance of combine is lifted to roof of seam and final operations for junction with conveyer working are performed in period of operations of combine for excavation of coal. Speed of attachment of roof is matched with speed of excavation of coal by combine by change of thicknesses of excavated lower and upper coal bands, arrangement and sequence of movement of sections of support or extendible cutters. During work of combine on backward run final operations for junction with air heading are performed. With start of cutting of wedge-shaped coal pillar screw of combine, frontal by run of combine, is lifted to level of partially extended cutters. As cutting goes cutters are extended too with cutting of under-roof coal band to entire width of excavation cycle. Front screw is lifted to roof of seam and the rest of coal pillar near conveyer working is removed. EFFECT: enhanced efficiency of coal excavation, increased bulk-up of excavated coal in time, improved productivity of machines of excavating complex and labour productivity due to integration of key operation of excavation cycle with execution of auxiliary operations in time. 6 cl, 10 dwg

Description

 The invention relates to the mining industry and can be used in the mining of coal seams of medium power and powerful, with a stable and unstable roof, in working faces, equipped with mechanized supports with retractable clearing visors.

 A known method of excavating powerful strata, including mining the mineral stratum by a mechanized complex with dividing the stratum by power into separate packs, first excavating medium packs by the combine and subsequent collapse of the upper pack by pulling cleavers from the upper sections of the mechanized lining and transporting the recaptured mineral conveyor, in which after working off the middle pack and the passage of the combine, the collapse of the mineral resources of the upper pack is carried out on the lower laundress and a conveyor loaded with mineral recaptured from the middle pack (a.s. N 1498921, class E 21 C 41/04, 1985 "Method for excavating thick formations).

 The known method does not allow continuous extraction of coal for the following reasons. Performing terminal operations at the conveyor mine requires stopping the combine and its subsequent notching by “oblique races” or self-drilling, which consumes a significant part of the working time. When the combine is working in direct motion with a cyclical recess of the middle part of the formation to the entire depth of the cut, a constant extension of the shear to the same depth is required. At the same time, it is known from experience that during such an extension, the cleavers deviate into the working area of the lining and pick up the coal pack, leading to a loss of the removed power and subsequent backing of the roof to restore it. Roof support in the face is also an unproductive operation, leading to the loss of working time and, accordingly, coal production. In addition, the breakdown of the upper pack of coal with shears is carried out only when the working branch of the conveyor is loaded or on the ledge shelf, which also does not allow continuous extraction of coal by the treatment complex.

 The closest to the proposed technical essence and the achieved result is a method of coal extraction by a treatment complex, including treating the formation in the face with a mechanized complex with dividing the formation into separate packs by power, breaking and loading coal with the screws of the combine and transporting it with a long conveyor, cutting the combine from the side conveyor production by oblique race with leaving on the notch section of the upper pack of coal with its subsequent chipping by retractable cleavers of mechanized lining, operation of the combine in coal extraction in direct motion with leaving the lower pack of coal and securing the roof, operation of the combine in reverse operation with breaking and loading of the lower coal pack, extension of the support sections with simultaneous cleaning of cleavers and moving the conveyor wave, performing terminal operations in conjunction with mining excavations (Potapenko V.A., Gritsyuk B.I., Nikolaev S. V. Improvement of treatment facilities for thick seams. // Improvement of mining technology and prediction of coal bedding in the mines of the Moscow region ba Sseyna: Sat scientific TR / IHD them. A.A. Skochinsky, PNIUI-Tula, 1989, p.24-29 - taken as a prototype).

 However, the known method also does not provide a high-performance continuous extraction of coal complex. The notch of the harvester at the conveyor belt by means of "oblique races" or self-cutting, which practically did not give a result, does not allow to ensure the continuity of the excavation. Loss of production and the continuity of coal extraction are more associated with the execution of terminal operations at the conveyor mine, which interfere with the harvester notch and the beginning of coal extraction. During the cutting of the combine with oblique races, coal mining is practically absent and the duration of this period depends on the speed of the end operations at the interface of the conveyor output with the treatment face. In addition, the constant excavation of the middle part of the seam by the combine and the chipping of the upper pack by retractable shear bolts to the entire depth of the seam to the deviation of the shear into the shank, the loss of the removed capacity of the seam and subsequent backing of the roof, which not only does not ensure the continuity of the excavation, but also stops coal mining and move the lining. A similar loss in the continuity of coal mining occurs during the processing of the end section of the face, when the combine is first brought to the ventilation mine, returned to the top, cleaved off the upper bundle of coal, and the combine returned to load the beaten upper bundle and break the lower one.

 The essence of the invention lies in the fact that the treatment of the formation in the working face is carried out by a mechanized complex with power separation into separate packs, with the blasting and loading of coal by the screws of the combine and transportation by the face conveyor, notching of the combine from the side of the conveyor output by oblique rides, leaving the upper bundle in the notch section coal with its subsequent chipping with retractable cleavers of the section of mechanized lining, the work of the combine for the extraction of coal in direct motion, leaving the bottom pack of coal and fastening to ovli, operation of the combine in reverse with chipping and loading of the lower bundle of coal, extension of the support sections with simultaneous cleaning of shears and moving with the conveyor wave, terminal operations at the interfaces with excavation workings, cutting of the combine is carried out at a distance not less than its full length from the conveyor working in the area lavas with the formation of wedge-shaped coal in the plan of the pillar, after the introduction of the combine augers to the entire depth of the cut, they raise the auger forward along the direction of travel to the formation roof and during the operation of the combine with coal extraction in direct motion perform terminal operations in conjunction with conveyor mining, move the conveyor from the notch of the combine to the conveyor production, and the fastening speed of the roof is coordinated with the speed of excavation of coal by the combine by changing the capacities of the lower and upper packs of coal removed, the order and sequence of the extension of the support sections or retractable cleavers, the operation of the combine in reverse is carried out with the screws lowered to the formation soil, during the operation of the combine in reverse, end operations are performed in conjunction with ventilation production, with the beginning of the breaking of the wedge-shaped coal pillar, the frontal auger of the combine is raised to the level of partially extended cleavers, as they are cleaved, the cleavers are pulled with cleavage of the under-roofing burst of coal to the full width of the excavation cycle, they understand the front auger to the top of the bed and produce excavation of the remaining pillar of coal from the conveyor belt.

 In addition, the notch of the harvester is carried out on a section of lava with a length of 20-30 m.

 In addition, the fastening of a stable roof can be done by pulling out the lining section with a lag from the combine from 1 to 20 lining sections.

 In addition, the fastening of an unstable roof can be done by pulling directly behind the raised auger of the combine retractable cleavers, acting as a temporary lining.

 In addition, in the presence of coal extraction from the face, roof fastening along the entire front of the lava or in its individual sections can be fashioned from the preliminary, before the passage of the combine, by pulling out cleavers, with cleavage of formed canopies of coal and uneven roofs.

 In addition, the power of the upper pack of the reservoir, taken out by the forward stroke of the combine, is at least half the thickness of the reservoir.

 In addition, the power of the lower seam pack left in the face of the working face during the forward course of the combine is no more than 2/3 of the screw diameter.

 The causal relationship between the totality of the essential features of the claimed invention and the achieved technical result is as follows.

 Known methods for the extraction of coal by the treatment complex do not provide continuous extraction of coal. The inevitable loss of working time when performing some operations of the extraction cycle, of course, also leads to the loss of coal production. The losses of working time and coal mining at the end operations of the extraction cycle are especially great. One of the most basic end operations - cutting a combine into the coal face until now, for a number of reasons of a technical and technological order, remains the most labor-intensive and leads to a loss of coal production and working time, that is, disrupts the continuity of coal extraction. There are two of the most well-known methods of cutting a combine: by self-drilling or by "oblique races". Self-cutting of the combine is practically feasible only if at least one auger of the combine goes into the excavation. However, this is rarely possible, since excavations are carried out, as a rule, with the demolition of the roof or soil, and not over the coal seam and, in addition, are fixed with special types of supports - metal or special concrete, and it is difficult to cut this excavation for the combine or its auger to exit task. Direct self-drilling by introducing screws into the coal face while feeding the conveyor to the face is technically not feasible, firstly, due to imperfections in the face of the combine cutters, which quickly wear out and do not penetrate into the face even with high efforts to feed the conveyor to the face, but, secondly, feeding the conveyor to the face by hydraulic jacks of its movement is extremely uneven and leads either to the rollover of the combine engine, or to a rupture of connecting links between the linear sections of the conveyor.

 The second way of cutting the combine into the face by means of “oblique races” is most widely used, but it is also unproductive and leads to a loss of continuity in coal extraction and, accordingly, to a decrease in coal production. When cutting the combine with “oblique races”, for example, when it is near the conveyor mine, the conveyor is moved 0.1–0.2 m wave from the combine to the side of the ventilation mine and the combine works to remove this narrow strip of coal at a distance of 10–20 m. Then they move part of the conveyor in a wave from the conveyor belt to the combine by 0.2-0.3 and again they now work in the opposite direction, to the conveyor belt. Then they again move the conveyor, as at the beginning of the notch, and again, in a straight way remove a narrow strip of coal and so on, two or three times, depending on the geological, technical and other conditions. Naturally, this path leads to a loss of continuity in coal extraction, working time and coal production.

 The claimed technical solution proposed a different way. After the combine’s return stroke, the last one, without stopping it, the end section of the working face is processed at the conveyor mine, the front auger of the combine is raised to the level of the shear of the retractable visors, and the combine is cut in the lava section with the formation of a wedge-shaped coal pillar with a vertex at moved parts of it. The length of this wedge-shaped in terms of the section of the face is 20-30 m for reasons of the smallest bend of the conveyor due to the possible disengagement of the spindle feed of the combine. The top of the wedge-shaped pillar is the starting point of the harvester notching and should be located at a distance of not less than the full length of the combine from the conveyor output due to the exclusion of the jamming of the combine between the face and the conveyor when moving the conveyor. As the harvester is notched, the depth of the cut increases from zero at the top of the wedge-shaped pillar to its full depth at the base, equal to the width of the harvester.

 It is impossible to raise the combine auger under the roof in this section of the combine cutter, as the roof supports prevent it, so the front combine auger breaks the coal below the canopies, leaving a pack of coal at the roof. Fastening the lining is carried out by incomplete (before slaughter) pulling the cleaver out of the peaks of the lining with a cleavage of a pack of coal not broken off by the auger of the combine. The harvester rear auger is lowered to the formation soil during the notching and performs breaking and loading of coal onto the conveyor. The lining sections in the notch section during forward running are not extended, achieving the maximum notch speed simultaneously with the extraction of coal. During the notch of the combine, the conveyor section is moved from the place of the beginning of the notch to the conveyor output until the lining sections are extended, in order to prevent the flow of working fluid when the sections are extended with the beginning of their movement due to the limited performance of the lining hydraulic system.

 After the notch of the combine and the introduction of screws to the entire depth of the cut, the front auger is raised to the top of the seam, and the rear auger is raised until coal packs remain in the soil of the seam with a capacity (thickness) of no more than 2/3 of the screw diameter. The power of the upper pack, taken out by the forward stroke of the combine, should be at least half of the thickness of the reservoir. The accepted values of the power of coal packs are justified by a number of factors, the main of which is the maximum productivity of the combine for the extraction of coal. The specific value of the coal removed and the left packs of coal is determined empirically, depending on the physicomechanical and rheological properties of the coal, the diameter of the screws, the engine power of the combine, the device of the shear and the developed cleaving force, etc. In addition, it should be taken into account that with the direct course of the combine the downstream auger of the combine works in an array of coal and the roof is fastened behind a working combine, mainly this is done in a direct course, and the speed of the combine in the recess should match or izhatsya to the mounting speed, ie vydvizhki support units. During the reverse course of the combine, the conditions for the extraction of coal are facilitated and the conveyor can be pulled out at a higher speed than fastening the roof, therefore the speed of the combine during the reverse course is much higher than with the direct course, for which the left pack of coal in the soil should not be more than 2/3 diameter.

 To achieve continuity of coal extraction, the speed of roof fastening, as an auxiliary operation of the extraction cycle, is coordinated with the speed of coal extraction by the combine, the main operation of the extraction cycle, by changing the order and sequence of the extension of the roof support sections or retractable cleavers.

 So, for example, the fastening of a stable roof can be done by pulling out the lining sections with a gap from the combine from 1 to 20 lining sections. At the same time, the combine continues the continuous extraction of coal, and the fastening of the roof can be continued after eliminating the causes of the delay. More than 20 roof support sections cannot be left unsecured; it is not recommended to recommend it because of the impossibility of further liquidation of the failure, when the ordinary team will no longer be able to fix the roof on a larger section of the working face with auxiliary means.

 An unstable roof can be fastened, if necessary, by pulling directly behind the upper, raised auger of the combine, retractable cleavers, acting as temporary lining. In this case, the extension of the lining section can be made during the return stroke of the combine.

 In the case of coal extraction from the bottom, when there is a possibility of a roof collapse in front of the roof supports before the combine passage, temporary roof fastening along the entire front of the lava or in its individual sections can be carried out with a preliminary, before the combine passage, extension of shears, in a row on each roof support section or with the gap between them, with cleavage of formed canopies of coal or uneven roofs.

 The wedge-shaped pillar in the plan is removed during coal extraction by the reverse stroke of the combine with the lower notch of the coal pack left during the forward course of the combine. At the same time, in order to achieve the highest productivity of coal mining, the combine harvester speed is selected as much as possible from the specific conditions. As the wedge-shaped pillar is broken, the cleavers move to the full width of the excavation cycle with chipping of the subroofing pack of coal and the lining sections are moved with cleaver cleansing. Following the return stroke of the combine, the conveyor is moved, leaving a part of the lava 20-30 m long between the moved part and the non-moved part of the conveyor working which is not moved before the conveyor mine and partly moved by the "wave".

 Thus, during direct and reverse operation of the combine, continuous mining of coal is carried out by the combine, the main operation of the extraction cycle, and all auxiliary operations are the extension of the shear and temporary fastening of the roof, the movement of the lining section with the cleavers and the main roof, the movement of the conveyor, the notch of the conveyor , end operations are combined in time with the extraction of coal by the combine, which ensures the continuity of the extraction of coal.

 The technical result of the proposed solution is expressed in increasing the efficiency of coal mining, increasing the volume of coal mined in time, increasing the productivity of the mining complex machines and labor productivity by combining the main operation of the mining cycle - coal mining combines with the implementation of auxiliary operations in time.

 In FIG. 1 shows a plan view of a mining complex during notching of the combine, FIG. 2 is the same as in FIG. 1 during the excavation of the upper stack of coal by the combine, in FIG. 3 is the same as in FIG. 1 during the extraction of the lower pack of coal by the combine, in FIG. 4 is the same as in FIG. 1 during the extraction of a pillar of coal from a conveyor belt; FIG. 5 shows the position of the augers of the combine with the forward stroke of the combine — view from the side of the face; in FIG. 6 - position of the augers of the combine during the reverse course of the combine - view from the side of the face; in FIG. 7 is a view along AA in FIG. 1, in FIG. 8 is a view along BB in FIG. 2, in FIG. 9 is a view along BB in FIG. 3, in FIG. 10 is a view along DG in FIG. 4.

 The drawings show: 1 - treatment face (lava); 2 - treatment mechanized complex; 3 - a shearer, 4 - auger of a shearer, 5 - downhole conveyor, 6 - conveyor mine, 7 - ventilation mine, 8 - coal seam, 9 - upper seam bundle, 10 - lower seam bundle, 11 - mechanized roof support section; 12 - roof support section visor, 13 - retractable roof cleaver section, 14 - downhole conveyor head drive, 15 - ventilation outlet mating support, abc - wedge-shaped pillar of coal taken out during harvester cutting, ac - wedge-shaped pillar of coal taken out during harvester reverse.

 The method is as follows.

 The excavation cycle begins with the notch of the shearer 3 at the conveyor output 6. The notch of the combine 3 is made after the extraction of the next excavation cycle and the conveyor is moved 5. The notch of the combine 3 is carried out at a distance of not less than its full length from the conveyor output 6 so that when moving the face conveyor 5 to prevent jamming of the screws 4 of the combine 3 between the face and the conveyor 5.

 The notch of the combine 3 is made on the lava section with a length of 20-30 m in order to guarantee the reliability of the engagement of the spreader 3 with the spreader bar of the face conveyor 5 in places of its bends during movement. With the beginning of the notch, the first auger 4 of the combine 3 is lifted up to the position that excludes the contact of the auger raised up with the visor 12 of the powered support section, while the second auger is lowered to the formation soil.

 As the combine moves from the conveyor outlet 6 towards the ventilation outlet 7, the screws 4 are introduced into the rear of the coal with the formation of a tapered cut abc with the apex at the non-moved part of the conveyor 5 and the base at the moved part of the conveyor with the introduction of screws along the entire depth of the cut equal to the width of the harvester 3. Front along the auger 4 of the combine 3 remove the upper part of the coal seam 8, leaving the under-roof pack at the level of the peaks 12 of the lining section, remove the bottom stack of coal with the rear auger from loading to the face conveyor 5. The roofing bundle of coal after the passage of the combine 3 is chipped with retractable cleavers 13 with simultaneous fastening of the roof, pushing the cleavers to the bottom, that is, incompletely, depending on the depth of the cut made by the screws of the combine 4.

 After the introduction of the screws 4 of the combine 3 to the entire depth of the cut, the downhole conveyor 5 is moved from the place of the notch to the conveyor mine 6 together with the head drive 14 and the mounting support 15 of the conveyor mine 6, moreover, these terminal operations are combined in time with the operation of the combine for further coal extraction straight forward.

 At the end of the notch of the combine 3, the front auger 4 in the direction of travel is raised under the roof of the formation, and the rear auger is raised to the level of the left lower bundle of coal. When the combine 3 moves to the ventilation mine 7, a top 9 pack of the seam is excavated with the bottom 10 pack of coal left in the soil of the seam. The power of the upper 9 packs of the bed, taken out by the direct course of the combine, is, as a rule, not less than half the power of the bed, and the power of the lower 10 packs of coal left in the soil of the stope, while not more than 2/3 of the screw diameter. The accepted values of the power of packs of coal 9 and 10 are justified by a number of factors, the main of which is the maximum productivity of the combine 3 for coal extraction.

 The specific value of the upper pack of coal taken out by the direct stroke of 9 and left for the reverse cut of the bottom pack of 10 coal is determined empirically, depending on the physicomechanical properties of the coal, the thickness of the formation, the diameter of the screws 4, the power of the engines of the combine 3, the device of the cleaver 13, the developed force chips and others. When determining the power of the removed packs of coal, it is taken into account that in the forward course of the combine 3, the forward auger 4 of the combine 3 works in the coal mass with maximum load and is simultaneously attached e roof for operating a combine vydvizhki by support frames 11 generally also produce the direct course, the recess of the combine speed velocity should be close fastening roof and these operations have to be linked in time.

 Thus, by choosing the capacities of the top 9 packs taken out by the direct drive of the combine 3 and the left 10 packs of the coal seam and the fastening speed of the roof by pulling out the sections, the speeds of the excavation and fastening are agreed. In addition, the speed of fastening the roof behind a working combine 3 is coordinated with the speed of excavation of coal by changing the order and sequence of the extension sections of the lining 11 or retractable cleaver 13.

 The fastening of a stable roof behind a working combine 3 can be done by pulling out the sections of the lining 11 with a lag from the combine from 1 to 20 sections. The specific value of fixing the fastening from the recess is determined empirically, taking into account the degree of stability of the roof, the severity of the manifestations of rock pressure, the composition of the roof rocks, the reliability of the equipment of the complex and other factors, but should not exceed 20 roof support sections from the point of view of work safety.

 If the roof of the formation is unstable and does not allow the extraction of coal with a lag behind the upper screw 4 of the combine 3, the roof can be fastened by pulling directly behind the raised screw the sliding cleavers 13, which in this case act as a temporary support. In this case, the extension of the sections 11 with the cleaver 13 removed inside the roofs 12 of the lining is carried out with any lag from the coal extraction in any sequence, which allows continuous extraction of coal in an unstable roof.

 In the presence of coal extraction from the face, temporary fastening of the roof along the entire front of the lava or in its individual sections is carried out from the preliminary, until the passage of the combine 3, by sliding the sliding cleavers 13 in a row on each section of the support 11 or with gaps between them, with cleavage of formed canopies of coal and irregularities roofing. The extension of the lining sections 11 in this case is also carried out with any lag from the coal extraction and in any sequence.

 The proposed procedure for securing the roof allows it to be matched with the speed of the shearer 3 for coal extraction, and therefore, to combine in time the main operation of the extraction cycle for coal extraction with the auxiliary operation for securing the roof.

 After excavation of the upper pack 9 of the formation throughout the length of the working face 1 from the notch to the ventilation output 7, the screws 4 of the combine 3 process the end section of the working face by excavating the formation at its full capacity, then both screws are lowered onto the soil of the formation. As coal is mined at the end section of the lava near the ventilation mine, the lining sections 11 are extended, the end drive 16 of the downhole conveyor 5 is moved, the lining of the ventilation mine 7 is supported. All these operations are combined with the operation of the combine 3, which moves backward with the augers 4 lowered ventilation workings 7 to conveyor workings 6 and excavates the lower pack of formation 10 with soil cleaning and loading coal onto the downhole conveyor 5. Following the work of the combine 3 to excavate the lower pack of formation 10 with cleanings th lava soil produce shifting of the face conveyor 5 to the bottom.

 After the passage of the combine 3 to the notch section, a notch is formed formed at the notch of the wedge-shaped pillar of coal as. At the same time, the front auger 4 of the combine 3 is raised up to a level that excludes its contact with the retractable cleavers 13 partially extended during the forward course of the combine, the rear auger is left at the lava soil 1. When the combine 3 is moving to the conveyor belt 6 with the forward auger 4 combine harvester produce the excavation of the upper part of the reservoir, leaving the subroofing pack 9, which partially extended cleavers 13 do not allow to extract, the rear screw excavate the lower pack 10 of the reservoir and clean the lava soil. As the wedge-shaped pillar of coal is cut off, the retractable cleavers 13 are chipped off of the subroofing pack 9 of the seam remaining after the passage of the combine to the full width of the excavation cycle, then the support sections 11 are pushed to the face with cleavers cleared inside the visors 12.

 After excavation of the wedge-shaped pillar of coal as, without stopping the combine 3, excavation of the pillar of coal from the conveyor mine 6 is carried out for the whole thickness of the formation, for which the forward auger 4 is lifted to the roof of the formation, the rear auger is left near the soil. As coal is mined by the combine, the lining sections 11 are extended and the bottomhole conveyor 5 is moved.

 When the combine 3 passes along the forward screw 4 to the conveyor belt 6, the screws of the combine process the end section of the working face 1, excavating the formation for all its power. In this case, the front auger 4 is raised under the roof of the lava and after processing the face is lowered. The movement of the downhole conveyor 5 is carried out at a distance of not less than the full length of the combine 3 from the conveyor output 6, so as to prevent jamming of the screws 4 of the combine between the conveyor 5 and the face. Then again produce a notch shearer 3.

Claims (7)

 1. A method of continuous coal mining by a treatment complex, including working out a seam in a treatment face by a mechanized complex with dividing the seam by capacity into separate packs, breaking and loading coal with the augers of the combine and transporting it with a downhole conveyor, cutting the combine from the side of the conveyor output by oblique rides leaving it on the site nicks of the upper bundle of coal with its subsequent chipping by retractable cleavers of the mechanized lining section, the work of the combine for the extraction of coal in direct motion, leaving the lower pa coal ki and roof fastening, reverse operation of the combine with chipping and loading of the lower coal pack, extension of the support sections with simultaneous removal of cleavers and moving the conveyor wave, performing terminal operations at the interfaces with excavation workings, characterized in that the combine is notched at a distance of at least of its full length from the conveyor mine in the lava section with the formation of coal wedge-shaped in the plan of the pillar, after the introduction of the auger screws, the front auger is raised to the entire depth of the cutting during the course of the seam and during the operation of the combine for the extraction of coal in direct motion, they perform end operations at the conveyor mine and move the conveyor from the notch of the combine to the conveyor mine, and the fastening speed of the roof is coordinated with the speed of excavation of coal by the combine by changing the capacity of the extracted coal bundles, the order and sequence of the extension support sections or retractable cleavers, the harvester is operated in reverse with screws lowered to the formation soil, while the harvester is operated in reverse, ventilation operations, with the beginning of the breaking of the wedge-shaped coal pillar, the front auger in the direction of travel of the combine is raised to the level of partially extended cleavers, as it breaks, the cleavers are pulled with chipping of the subroofing pack of coal to the full width of the excavation cycle, the front auger is raised to the top of the formation and produced excavation of the remaining pillar of coal from the conveyor belt.  2. The method of continuous excavation according to claim 1, characterized in that the notch of the combine is produced on a section of lava 20-30 m long.  3. The method of continuous excavation according to claim 1 or 2, characterized in that the fastening of the stable roof can be done by pulling out the lining section with a lag from the combine from 1 to 20 lining sections.  4. The method of continuous excavation according to any one of claims 1 to 3, characterized in that the fastening of the unstable roof can be carried out by pulling directly behind the lifted auger of the combine retractable cleavers, acting as temporary lining.  5. The method of continuous excavation according to any one of claims 1 to 4, characterized in that, in the presence of coal extraction from the face, temporary fastening of the roof along the entire front of the lava or in its individual sections is carried out from the preliminary, to the passage of the combine, by pulling out sliding cleavers, in a row on each section of the lining or with gaps between them, with cleavage of formed canopies of coal and unevenness of the roof.  6. The method of continuous excavation according to any one of claims 1 to 5, characterized in that the power of the upper pack of the reservoir, taken out by the forward stroke of the combine, is at least half the thickness of the reservoir.  7. The method of continuous excavation according to any one of claims 1 to 6, characterized in that the power of the lower pack of the reservoir left in the soil of the working face during the forward course of the combine is not more than 2/3 of the diameter of the screw.

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