CN118008285A - Mining method and system for fully-mechanized mining face - Google Patents

Abstract

The invention relates to the technical field of coal mining, in particular to a method and a system for mining a fully-mechanized coal mining face, wherein the method for mining the fully-mechanized coal mining face comprises the following steps of S1, a first double-drum coal mining machine cuts coal from a first middle following region to a first end region until the coal wall of the first end region is thoroughly cut, and a hydraulic support gradually rises between the first middle following region and the first end region along the direction from the first end region to the first middle following region; meanwhile, the second double-drum coal cutter cuts coal from the second middle heel region to the second end region until the coal wall of the second end region is cut thoroughly, and the hydraulic support gradually rises between the second middle heel region and the second end region along the direction from the second end region to the second middle heel region. Three triangular coal areas, especially one in total beveling feeding in the middle of the working surface, are formed, only one triangular coal area is formed, the formation of the triangular coal areas is effectively reduced, the running times and the running distance of empty cutters of a coal machine are reduced, and the mining efficiency is further improved.

Description

Mining method and system for fully-mechanized mining face

Technical Field

The invention relates to the technical field of coal mining, in particular to a mining method and a mining system for a fully-mechanized coal mining face.

Background

In the mining process of medium-thickness coal seams, increasing the length of a working face is an effective means for improving the production efficiency, and most fully-mechanized mining working faces at present adopt a single-coal machine two-way coal cutting mode for mining. The adoption of the double coal mining machines can further improve the mining efficiency, and particularly for the ultra-long working surface with the diameter of more than 600M, the stoping period of the coal mining machines is greatly reduced.

In the prior art, a method of mining by using two coal mining machines can be adopted, the coal mining machines feed from two ends respectively, the second coal mining machine adopts a two-way coal cutting mode, the first coal mining machine adopts a one-way coal cutting mode, and the first coal mining machine cuts through triangular coal left by the second coal mining machine in a middle intersection area. However, in the above-mentioned two-coal-machine coal mining process, the two-coal-machine coal cutting processes are different, and in the ultra-long working face, the travel distance for returning the idle cutter of the one-way coal-cutting coal-mining machine is too long, and it is necessary to wait for the two-way coal-cutting machine for a long time at the intersection, resulting in low efficiency.

The scheme of two-way coal cutting of two double-drum shearer can also be adopted, the two shearer feeds from the middle part and the end head respectively, and the shearer fed from the end head cuts the residual triangular coal in the middle part thoroughly and then reversely and obliquely cuts the residual triangular coal. However, the scheme needs four beveling feeds in total for two coal machines in the whole cycle operation period, and the two coal machines are too far away from each other to be convenient for calibration and synchronization.

Disclosure of Invention

The invention provides a mining method and a mining system for a fully-mechanized coal mining face, which are used for solving one of the defects of the prior art, and realizing the formation of three triangular coal areas, in particular to the formation of one triangular coal area by carrying out chamfering feeding at the middle part of the face at one time, thereby effectively reducing the formation of the triangular coal area, reducing the running times and the running distance of a blank cutter of a coal machine and further improving the mining efficiency.

The invention provides a mining method of a fully-mechanized coal face, a mining system based on the fully-mechanized coal face comprises a first double-drum coal mining machine and a second double-drum coal mining machine, the face sequentially comprises a coal machine intersection area, a middle machine following area and an end area from the middle to the two ends, and the mining system comprises the following components:

S1, cutting coal from a first middle heel region to a first end region by the first double-drum coal cutter until the coal wall of the first end region is cut completely, wherein a hydraulic support gradually rises between the first middle heel region and the first end region along the direction from the first end region to the first middle heel region; meanwhile, the second double-drum shearer cuts coal from a second middle heel region to a second end region until the coal wall of the second end region is cut completely, and the hydraulic support is gradually lifted between the second middle heel region and the second end region along the direction from the second end region to the second middle heel region;

S2, the first double-drum shearer cuts coal from the first end head area to the first middle heel area so as to form a first triangular coal area between the first middle heel area and the first end head area; meanwhile, the second double-drum shearer cuts coal from the second end head region to the second middle heel region so as to form a second triangular coal region between the second middle heel region and the second end head region;

S3, pushing the hydraulic support of the first end zone and the hydraulic support of the first triangular coal zone, and cutting coal of the first triangular coal zone by the first double-drum shearer from the first middle heel zone to the direction of the first end zone until the coal wall of the first end zone is cut thoroughly; simultaneously, the hydraulic support of the second end zone and the hydraulic support of the second triangular coal zone push away, and the second double-drum shearer cuts coal in the second triangular coal zone from the second middle heel zone to the direction of the second end zone until the coal wall of the second end zone is cut thoroughly;

S4, the first double-drum shearer cuts coal from the first end head area to the first middle machine following area until the first double-drum shearer reaches a first set position of the coal machine intersection area; the second double-drum shearer cuts coal from the second end head area to the second middle machine following area until the second double-drum shearer reaches a second set position of the coal machine intersection area, and the hydraulic support is gradually lifted between the coal machine intersection area and the second middle machine following area along the direction from the coal machine intersection area to the second middle machine following area;

S5, the second double-drum shearer cuts coal from the second middle machine following area to the second end area so as to form a third triangular coal area between the coal machine intersection area and the second middle machine following area; meanwhile, the first double-drum shearer cuts coal from the first set position to the second set position until the first double-drum shearer reaches a third set position of the third triangular coal area;

S6, pushing the hydraulic support of the coal machine intersection area and the hydraulic support of the third triangular coal area, and cutting coal from the third set position to the first middle machine following area by the first double-drum coal cutter.

According to the mining method of the fully-mechanized mining face, the length of the second middle heel region is larger than that of the first middle heel region.

According to the mining method of the fully-mechanized coal mining face, the length of the second middle machine following region is the sum of the length of the first middle machine following region and the coal machine intersection region.

According to the mining method of the fully-mechanized mining face provided by the invention, in the step S4, after one of the first double-drum shearer reaching the first set position and the second double-drum shearer reaching the second set position is completed, the other is equally processed, and then the step S5 is performed.

According to the mining method of the fully-mechanized mining face provided by the invention, the step S6 comprises the following steps:

S61, the first double-drum shearer reaches the third set position, and the hydraulic support of the coal machine intersection area and the hydraulic support of the third triangular coal area push and slide;

S62, the first double-drum shearer cuts coal in the third triangular coal area, and the hydraulic support of the third triangular coal area moves on a support of a heel machine of the first double-drum shearer;

s63, the first double-drum shearer reaches the second set position, and the second middle part slides along the hydraulic support of the machine following area;

S64, the first double-drum shearer reaches the first set position, and the hydraulic support of the third triangular coal area slides;

s65, moving the hydraulic support of the coal machine intersection area and the hydraulic support of the first middle machine following area along with the machine and pushing the hydraulic support.

According to the mining method of the fully-mechanized mining face provided by the invention, the step S1 further comprises the following steps:

The hydraulic support of the first middle heel region and the hydraulic support of the first end region move and push in the first double-drum coal mining machine heel region; and the hydraulic support of the second middle heel region and the hydraulic support of the second end region move and push in the heel region of the second double-drum coal mining machine.

According to the mining method of the fully-mechanized mining face provided by the invention, the step S2 further comprises the following steps:

The hydraulic support of the first end head area moves on a heel machine frame of the first double-drum shearer; and simultaneously, the hydraulic support of the second end head area moves on a heel machine frame of the second double-drum shearer.

According to the mining method of the fully-mechanized mining face provided by the invention, the step S4 further comprises the following steps:

The hydraulic support of the first end zone, the hydraulic support of the first triangular coal zone and the hydraulic support of the first middle heel zone move and push in the first double-drum shearer heel zone; the hydraulic support of the second end zone, the hydraulic support of the second triangular coal zone, the hydraulic support of the second middle machine following zone move with the machine and push.

According to the mining method of the fully-mechanized mining face provided by the invention, the step S5 further comprises the following steps:

And the hydraulic support of the coal machine intersection area moves and slides at the heel machine of the first double-drum coal mining machine.

The invention also provides a mining system of the fully-mechanized mining face, which is used for executing the mining method of the fully-mechanized mining face.

The fully-mechanized coal mining face mining method provided by the invention provides a two-way coal cutting process through the double-coal machine, so that the extraction efficiency of the ultra-long face is further improved, the processes of the two double-roller coal mining machines are similar, and the time synchronization is easier to achieve. Because the first double-drum coal cutter and the second double-drum coal cutter cut coal bodies from the middle follow-up area in the middle of the working surface, the whole working surface is subjected to chamfering feeding only three times in one extraction period, namely three triangular coal areas are formed, and particularly, the middle of the working surface is subjected to chamfering feeding once in total, only one triangular coal area is formed, so that the formation of the triangular coal areas is effectively reduced, the running times and distance of empty cutters of the coal cutter are reduced, and the extraction efficiency is further improved. Dividing a coal cutter intersection region between the first middle coal cutter intersection region and the second middle coal cutter intersection region, wherein the first double-drum coal cutter and the second double-drum coal cutter meet in the coal cutter intersection region, so that the synchronization of the two coal cutters is conveniently calibrated, and the synergistic effect of the double coal cutters is improved.

In addition to the technical problems, features of the constituent technical solutions and advantages brought by the technical features of the technical solutions described above, other technical features of the present invention and advantages brought by the technical features of the technical solutions will be further described with reference to the accompanying drawings or will be understood through practice of the present invention.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic flow chart of a fully mechanized coal mining face mining method provided by the invention;

Fig. 2 is a schematic structural diagram of step S1 of the mining method of the fully-mechanized coal mining face provided by the present invention;

Fig. 3 is a schematic structural diagram of step S2 of the mining method of the fully-mechanized coal mining face provided by the present invention;

fig. 4 is a schematic structural diagram of step S3 of the mining method of the fully-mechanized coal mining face provided by the present invention;

fig. 5 is a schematic structural diagram of step S4 of the mining method of the fully-mechanized coal mining face provided by the present invention;

FIG. 6 is a schematic structural diagram of step S5 of the mining method of the fully-mechanized coal mining face provided by the invention;

Fig. 7 is a schematic structural diagram of step S6 of the mining method of the fully-mechanized coal mining face.

Reference numerals:

100. a first twin drum shearer; 200. a second double-drum shearer; 300. a hydraulic support;

410. A first header region; 420. a first triangular coal section; 430. a first middle heel region;

510. A second termination region; 520. a second triangular coal section; 530. a second middle heel region;

600. A third triangular coal section; 700. and a coal machine intersection area.

Detailed Description

Embodiments of the present invention are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the invention but are not intended to limit the scope of the invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present invention will be understood in detail by those of ordinary skill in the art.

In embodiments of the invention, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Furthermore, in the description of the embodiments of the present invention, unless otherwise indicated, the meaning of "a plurality of", "a plurality of" means two or more, and the meaning of "a plurality of", "a plurality of" means one or more ".

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

As shown in fig. 1 to 7, in the mining method of the fully-mechanized coal mining face provided by the embodiment of the present invention, a mining system based on the fully-mechanized coal mining face includes a first double-drum shearer 100 and a second double-drum shearer 200, and the face includes a coal machine intersection area 700, a middle machine following area and an end area from the middle to the two ends in sequence, including:

S1, the first double-drum shearer 100 cuts coal from a first middle heel region 430 to a first end region 410 until the coal wall of the first end region 410 is cut completely, and the hydraulic support 300 gradually rises between the first middle heel region 430 and the first end region 410 along the direction from the first end region 410 to the first middle heel region 430; meanwhile, the second double-drum shearer 200 cuts coal from the second middle heel region 530 to the second end region 510 until the coal wall of the second end region 510 is cut through, and the hydraulic support 300 gradually rises between the second middle heel region 530 and the second end region 510 along the direction from the second end region 510 to the second middle heel region 530;

S2, the first double-drum shearer 100 cuts coal from the first end head region 410 to the first middle heel region 430 to form a first triangular coal region 420 between the first middle heel region 430 and the first end head region 410; meanwhile, the second double-drum shearer 200 cuts coal from the second end region 510 to the second middle heel region 530 to form a second triangular coal region 520 between the second middle heel region 530 and the second end region 510;

s3, pushing the hydraulic support 300 of the first end zone 410 and the hydraulic support 300 of the first triangular coal zone 420, and cutting coal from the first middle heel zone 430 to the first end zone 410 by the first double-drum shearer 100 until the coal wall of the first end zone 410 is cut through; meanwhile, the hydraulic support 300 of the second end zone 510 and the hydraulic support 300 of the second triangular coal zone 520 push away, and the second double-drum shearer 200 cuts coal in the second triangular coal zone 520 from the second middle heel zone 530 to the direction of the second end zone 510 until the coal wall of the second end zone 510 is cut thoroughly;

S4, the first double-drum shearer 100 cuts coal from the first end head area 410 to the first middle heel area 430 until the first double-drum shearer 100 reaches a first set position of the shearer intersection area 700; the second double-drum shearer 200 cuts coal from the second end region 510 to the second middle heel region 530 until the second double-drum shearer 200 reaches a second set position of the shearer intersection region 700, and the hydraulic support 300 gradually rises between the shearer intersection region 700 and the second middle heel region 530 along the direction from the shearer intersection region 700 to the second middle heel region 530;

S5, the second double-drum shearer 200 cuts coal from the second middle heel region 530 to the second end region 510 to form a third triangular coal region 600 between the coal machine intersection region 700 and the second middle heel region 530; meanwhile, the first twin drum shearer 100 cuts coal from the first set position to the second set position until the first twin drum shearer 100 reaches the third set position of the third triangular coal area 600;

S6, pushing the hydraulic support 300 of the coal machine intersection area 700 and the hydraulic support 300 of the third triangular coal area 600, and cutting coal from the third set position to the first middle heel area 430 by the first double-drum shearer 100.

The mining method of the fully-mechanized coal mining face provided by the embodiment of the invention provides a process for bi-directionally cutting coal by a double-coal machine, so that the extraction efficiency of an ultra-long working face is further improved, and the processes of the two double-roller coal mining machines are similar, so that time synchronization is easier to achieve. Because the first double-drum shearer 100 and the second double-drum shearer 200 cut coal from the middle follow-up region in the middle of the working surface, the whole working surface only needs three beveling feeds in one recovery period, namely three triangular coal regions are formed, and particularly, the middle of the working surface is subjected to one beveling feed in total, and only one triangular coal region is formed, so that the formation of the triangular coal regions is effectively reduced, the running times and distance of empty cutters of the coal machine are reduced, and the exploitation efficiency is further improved. A coal cutter intersection area 700 is divided between the first middle coal cutter intersection area 430 and the second middle coal cutter intersection area 530, and the first double-drum shearer 100 and the second double-drum shearer 200 meet in the coal cutter intersection area 700, so that synchronization of two coal cutters is conveniently calibrated, and the synergistic effect of the double-drum shearer is improved.

In this embodiment, the working surface is divided into 8 areas, and the direction from the machine head to the machine tail is sequentially a first end area 410, a first triangular coal area 420, a first middle heel area 430, a coal intersection area 700, a third triangular coal area 600, a second middle heel area 530, a second triangular coal area 520 and a second end area 510. The first twin drum shearer 100 is responsible for cutting the legacy triangle coal of the first end section 410, the first triangle coal section 420, the first mid-heel section 430, the first coal-machine intersection section 700, and the third triangle coal section 600. The second dual-drum shearer 200 is responsible for cutting the second end section 510, the second triangular section 520, the second mid-heel section 530, and the third triangular section 600 for miter cut.

According to one embodiment of the present invention, the length of the second mid-heel region 530 is greater than the length of the first mid-heel region 430. In this embodiment, since the first twin drum shearer 100 needs to cut the coal wall of the shearer intersection area 700, in order to synchronize the operation time of the first twin drum shearer 100 and the second twin drum shearer 200, the length of the coal wall of the second middle heel area 530 is greater than that of the first middle heel area 430 when dividing the working surface, so as to ensure that the first twin drum shearer 100 and the second twin drum shearer 200 can meet synchronously at the shearer intersection area 700 when cutting the working surface towards the middle.

According to one embodiment of the present invention, the length of the second middle heel region 530 is the sum of the length of the first middle heel region 430 and the coal intersection region 700. In this embodiment, since the first twin drum shearer 100 is required to cut the coal wall of the coal blending region 700, the difference between the coal wall length of the second middle heel region 530 and the coal wall length of the first middle heel region 430 is the coal wall length of the coal blending region 700.

In other embodiments, the actual length of the first middle heel region 430 and the second middle heel region 530 may be adjusted according to different coal machine types, considering cutting speed, etc.

In this embodiment, the first dual-drum shearer 100 and the second dual-drum shearer 200 perform bi-directional cutting on the working surface, and the intersection position of the two shearers needs to be close to the middle point of the coal wall of the working surface, compared with the scheme that the offset middle point of the intersection area is larger, the method can be beneficial to improving the utilization rate of the shearer.

According to an embodiment of the present invention, in step S4, after one of the first twin drum shearer 100 reaches the first set position and the second twin drum shearer 200 reaches the second set position is completed, step S5 is performed after the other is completed. In this embodiment, in order to make two coal machines run synchronously, two key points, namely a first set position a and a second set position B, are set in the coal machine intersection area 700, the coal machines reaching the corresponding key points first wait, and when the first twin drum shearer 100 and the second twin drum shearer 200 reach the first set position a and the second set position B, respectively, step S5 is immediately performed.

According to an embodiment of the present invention, step S6 includes:

s61, the first double-drum shearer 100 reaches a third set position, and the hydraulic support 300 of the coal machine intersection area 700 and the hydraulic support 300 of the third triangular coal area 600 slide;

s62, the first double-drum shearer 100 cuts coal in a third triangular coal area 600, and a hydraulic support 300 of the third triangular coal area 600 moves in a rear machine of the first double-drum shearer 100;

s63, the first double-drum shearer 100 reaches a second set position, and the second middle part slides along the hydraulic support 300 of the shearer zone 530;

s64, the first double-drum shearer 100 reaches a first set position, and the hydraulic support 300 of the third triangular coal area 600 slides;

s65, the hydraulic support 300 of the coal machine intersection area 700 and the hydraulic support 300 of the first middle machine following area 430 move and push away.

In this embodiment, the first twin drum shearer 100 triggers the hydraulic supports 300 of the shearer intersection area 700 and the third triangular shearer 600 to push in groups at the third setting position C, the scraper is pushed to be flat, then the first twin drum shearer 100 feeds and cuts coal to the coal wall of the third triangular shearer 600, and the hydraulic support 300 of the third triangular shearer 600 moves along the first twin drum shearer 100. When the first double-drum shearer 100 reaches the second set position B, the hydraulic supports 300 of the second middle heel region 530 are triggered to execute pushing along with the second double-drum shearer 200, when the first double-drum shearer 100 reaches the first set position a, the hydraulic supports 300 of the third triangular coal region 600 are triggered to execute grouped pushing, and then the shearer intersection region 700 and the hydraulic supports 300 of the first middle heel region 430 execute heel-to-heel moving and heel-to-heel pushing along with the first double-drum shearer 100.

According to an embodiment of the present invention, step S1 further includes:

The hydraulic support 300 of the first middle heel region 430 and the hydraulic support 300 of the first end region 410 move and push in the heel of the first double-drum shearer 100; the hydraulic prop 300 of the second mid-heel region 530 and the hydraulic prop 300 of the second end region 510 move and push in the heel of the second double-barreled shearer 200.

In this embodiment, the first dual-drum shearer 100 and the second dual-drum shearer 200 cut coal toward the nose and the tail respectively, the first middle heel region 430, the first triangular coal region 420, and the hydraulic supports 300 in the first end region 410 push away in the first dual-drum shearer 100 heel region, and simultaneously, the second middle heel region 530, the second triangular coal region 520, and the hydraulic supports 300 in the second end region 510 push away in the second dual-drum shearer 200 heel region, and enter the bottom sweeping stage after cutting through the coal walls of the first end region 410 and the second end region 510.

In one embodiment provided according to the present invention, step S2 further includes:

the hydraulic mount 300 of the first end zone 410 is set up in the first twin drum shearer 100; simultaneously, the hydraulic mount 300 of the second end region 510 is moved at the heel of the second double-barreled shearer 200.

After the bottom sweeping operation of step S1 is completed, the hydraulic support 300 pushes out the serpentine segment in the first triangular coal zone 420, the first twin-drum shearer 100 moves toward the first middle heel zone 430, the hydraulic support 300 of the first end zone 410 moves along the first twin-drum shearer 100, and simultaneously, the hydraulic support 300 pushes out the serpentine segment in the second triangular coal zone 520, the second twin-drum shearer 200 moves toward the second middle heel zone 530, the hydraulic support 300 of the second end zone 510 moves along the first middle heel zone.

According to an embodiment of the present invention, step S4 further includes:

the hydraulic support 300 of the first end zone 410, the hydraulic support 300 of the first triangular coal zone 420 and the hydraulic support 300 of the first middle heel zone 430 move and push in the heel of the first double-drum shearer 100; the hydraulic prop 300 of the second end zone 510, the hydraulic prop 300 of the second triangular coal zone 520, and the hydraulic prop 300 of the second middle heel zone 530 move and push in the heel of the second shearer 200.

When the first double-drum shearer 100 is driven out of the first triangular coal area 420, the first end area 410 and the hydraulic supports 300 of the first triangular coal area 420 are pushed in groups, when the second double-drum shearer 200 is driven out of the second triangular coal area 520, the second end area 510 and the hydraulic supports 300 of the second triangular coal area 520 are pushed in groups, and at the moment, the two coal machines are reversely operated in the end direction to cut the triangular coal area, and the bottom sweeping stage is carried out.

After the bottom sweeping operation of step S3 is completed, the first twin drum shearer 100 is operated toward the first middle heel region 430, the hydraulic support 300 performs a heel-lift and heel-push action behind the first twin drum shearer 100, the second twin drum shearer 200 is operated toward the second middle heel region 530, and the hydraulic support 300 performs a heel-lift and heel-push action behind the second twin drum shearer 200.

According to an embodiment of the present invention, step S5 further includes:

the hydraulic mount 300 of the coal mining intersection 700 is set up and pushed away at the heel of the first twin drum shearer 100.

In order to make two coal machines run synchronously, two key points, namely a first set position A and a second set position B, are arranged in the coal machine intersection area 700, the coal machines which arrive first wait, when the two coal machines respectively arrive at the key points, the hydraulic support 300 of the third triangular coal area 600 pushes out the snake-shaped section, the second double-drum coal cutter 200 runs reversely and cuts in a beveling way, and meanwhile, after the first double-drum coal cutter 100 continues to move forward to the coal machine intersection area 700, the double-drum is lowered to continue to move forward to the third set position C.

The embodiment of the invention also provides a mining system of the fully-mechanized coal mining face, which is used for executing the mining method of the fully-mechanized coal mining face.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A mining method of a fully-mechanized mining face is characterized by comprising the following steps: mining system based on combine and adopt working face, including first twin drum coal-winning machine and second twin drum coal-winning machine, the working face includes coal machine intersection district, middle part with machine district and end district from the middle part to both ends in proper order, includes:

S1, cutting coal from a first middle heel region to a first end region by the first double-drum coal cutter until the coal wall of the first end region is cut completely, wherein a hydraulic support gradually rises between the first middle heel region and the first end region along the direction from the first end region to the first middle heel region; meanwhile, the second double-drum shearer cuts coal from a second middle heel region to a second end region until the coal wall of the second end region is cut completely, and the hydraulic support is gradually lifted between the second middle heel region and the second end region along the direction from the second end region to the second middle heel region;

S2, the first double-drum shearer cuts coal from the first end head area to the first middle heel area so as to form a first triangular coal area between the first middle heel area and the first end head area; meanwhile, the second double-drum shearer cuts coal from the second end head region to the second middle heel region so as to form a second triangular coal region between the second middle heel region and the second end head region;

S3, pushing the hydraulic support of the first end zone and the hydraulic support of the first triangular coal zone, and cutting coal of the first triangular coal zone by the first double-drum shearer from the first middle heel zone to the direction of the first end zone until the coal wall of the first end zone is cut thoroughly; simultaneously, the hydraulic support of the second end zone and the hydraulic support of the second triangular coal zone push away, and the second double-drum shearer cuts coal in the second triangular coal zone from the second middle heel zone to the direction of the second end zone until the coal wall of the second end zone is cut thoroughly;

S4, the first double-drum shearer cuts coal from the first end head area to the first middle machine following area until the first double-drum shearer reaches a first set position of the coal machine intersection area; the second double-drum shearer cuts coal from the second end head area to the second middle machine following area until the second double-drum shearer reaches a second set position of the coal machine intersection area, and the hydraulic support is gradually lifted between the coal machine intersection area and the second middle machine following area along the direction from the coal machine intersection area to the second middle machine following area;

S5, the second double-drum shearer cuts coal from the second middle machine following area to the second end area so as to form a third triangular coal area between the coal machine intersection area and the second middle machine following area; meanwhile, the first double-drum shearer cuts coal from the first set position to the second set position until the first double-drum shearer reaches a third set position of the third triangular coal area;

S6, pushing the hydraulic support of the coal machine intersection area and the hydraulic support of the third triangular coal area, and cutting coal from the third set position to the first middle machine following area by the first double-drum coal cutter.

2. The mining method of a fully mechanized coal mining face of claim 1, wherein: the length of the second middle heel region is greater than that of the first middle heel region.

3. The mining method of a fully mechanized coal mining face according to claim 2, wherein: the length of the second middle machine following area is the sum of the length of the first middle machine following area and the coal machine intersection area.

4. The mining method of a fully mechanized coal mining face of claim 1, wherein: in step S4, after one of the first double-drum shearer reaching the first setting position and the second double-drum shearer reaching the second setting position is completed, step S5 is performed after the other is completed.

5. The mining method of a fully mechanized coal mining face of claim 1, wherein: the step S6 includes:

S61, the first double-drum shearer reaches the third set position, and the hydraulic support of the coal machine intersection area and the hydraulic support of the third triangular coal area slide;

S62, the first double-drum shearer cuts coal in the third triangular coal area, and the hydraulic support of the third triangular coal area moves on a support of a heel machine of the first double-drum shearer;

s63, the first double-drum shearer reaches the second set position, and the second middle part slides along the hydraulic support of the machine following area;

S64, the first double-drum shearer reaches the first set position, and the hydraulic support of the third triangular coal area slides;

s65, moving the hydraulic support of the coal machine intersection area and the hydraulic support of the first middle machine following area along with the machine and pushing the hydraulic support.

6. The mining method of a fully mechanized coal mining face of claim 1, wherein: the step S1 further includes:

The hydraulic support of the first middle heel region and the hydraulic support of the first end region move and push in the first double-drum coal mining machine heel region; and the hydraulic support of the second middle heel region and the hydraulic support of the second end region move and push in the heel region of the second double-drum coal mining machine.

7. The mining method of a fully mechanized coal mining face of claim 1, wherein: the step S2 further includes:

The hydraulic support of the first end head area moves on a heel machine frame of the first double-drum shearer; and simultaneously, the hydraulic support of the second end head area moves on a heel machine frame of the second double-drum shearer.

8. The mining method of a fully mechanized coal mining face of claim 1, wherein: the step S4 further includes:

The hydraulic support of the first end zone, the hydraulic support of the first triangular coal zone and the hydraulic support of the first middle heel zone move and push in the first double-drum shearer heel zone; the hydraulic support of the second end zone, the hydraulic support of the second triangular coal zone, the hydraulic support of the second middle machine following zone move with the machine and push.

9. The mining method of a fully mechanized coal mining face of claim 1, wherein: the step S5 further includes:

And the hydraulic support of the coal machine intersection area moves and slides at the heel machine of the first double-drum coal mining machine.

10. A mining system for a fully mechanized coal mining face, characterized by: a mining method for performing a fully mechanized mining face as claimed in any one of claims 1 to 9.