A method for breaking coal by dividing working face into zones and its supporting device

Abstract

The present invention discloses a method for zoning coal breaking of a working face and a supporting device, the method comprising dividing the coal mining working face into a drum pick mechanical cutting area and a flexible coal breaking area based on coal seam information; the drum pick mechanical cutting area contains a first coal body with an overall regular shape, and the bottom surface of the first coal body is the coal seam bottom plate of the coal seam; the flexible coal breaking area located above the drum pick mechanical cutting area contains a second coal body in contact with the top plate of the coal mining working face. The drum coal mining machine is placed in the drum pick mechanical cutting area, and the drum pick mechanism provided on the drum coal mining machine is controlled to perform mechanical cutting and coal breaking operations on the first coal body, and at the same time, the flexible area coal breaking mechanism provided on the drum coal mining machine is controlled to perform flexible coal breaking operations on the second coal body. The present invention does not require accurate identification of coal rocks, nor does it require frequent height adjustment of the cutting arm of the existing drum coal mining machine, which reduces the labor intensity of workers and reduces the occurrence of miscutting.

Description

Technical Field

[0001] The invention relates to the technical field of coal mining, in particular to a working face zoning coal breaking method and a matching device. Background Art

[0002] At present, coal mining mostly adopts the long-arm working face mining method. The mining face mainly uses a drum coal mining machine for mechanical cutting and breaking of coal. However, due to the complex and changeable roof above the coal seam and its generally high hardness, the contact between the cutting drum teeth of the coal mining machine and the roof is easy to cause damage to the teeth, and sparks are easily generated under high-intensity impact to ignite underground gas. If the cutting teeth do not cut in place or the coal close to the roof is abandoned, it is bound to cause waste of resources, and a large amount of residual coal can easily cause spontaneous combustion in the goaf. Therefore, personnel are required to monitor and control the height of the cutting drum in real time. Due to the harsh environment of the coal mining face, great dust, high labor intensity, and severe obstruction of vision, miscutting often occurs due to untimely monitoring.

[0003] There are currently two main technical solutions to the above pain points. One solution is to distinguish between coal and rock by loading various sensors such as radar scanning and vibration sensors on the coal mining machine. However, due to the harsh on-site environmental conditions and the influence of factors such as coal falling and other construction resonance, inaccurate recognition, large errors and poor stability often occur during the application process, and accurate identification of coal and rock has not yet been achieved; the second solution is to deploy multiple groups of cameras to shoot the coal-rock boundary in real time, upload the captured video to the ground in real time, and make judgments and remote controls through artificial remote vision on the ground. The accuracy of this solution has been improved, and the ground environment is far better than the coal mining working face. However, manual real-time monitoring and control are still required, especially for some working faces where the coal seam roof changes rapidly. The slightest negligence will result in miscutting, and a large amount of video surveillance has high requirements for camera cleanliness and clarity, as well as the real-time performance, packet loss rate, bandwidth and other parameters of the coal mine data transmission system. The existing underground ring network of many mines cannot meet the requirements.

[0004] To solve the above problems, a coal mining method and related devices are urgently needed to solve the problem of damaged cutting teeth or inadequate cutting of the cutting drum of the coal mining machine, as well as to reduce the labor intensity of workers, reduce miscutting, and improve accuracy, stability and universality. Summary of the invention

[0005] In view of the problems existing in the above-mentioned prior art, the present invention proposes a working face zoning coal breaking method and supporting device, which divides the coal mining working face into a rolling pick mechanical cutting area and a flexible coal breaking area, and the coal is broken by a flexible coal breaking method on the side close to the roof. The drum coal mining machine only needs to cut the relatively regular coal body in the rolling pick mechanical cutting area below the flexible coal breaking area. There is no need to accurately identify the coal rock, and there is no need for the existing drum coal mining machine cutting arm to frequently adjust the height, which reduces the labor intensity of workers and reduces the occurrence of miscutting. There is no need for real-time transmission of a large amount of camera data, and the requirements for underground ring network parameters in coal mines are relatively low, and it has strong universality.

[0006] The present invention discloses a method for coal breaking by dividing a working face into zones, comprising:

[0007] S1: Based on the coal seam information, the coal mining face is divided into a drum pick mechanical cutting area and a flexible coal breaking area; wherein the drum pick mechanical cutting area includes a first coal body of overall regular shape, and the bottom surface of the first coal body is the coal seam floor of the coal seam; the flexible coal breaking area located above the drum pick mechanical cutting area includes a second coal body in contact with the top plate of the coal mining face;

[0008] S2: placing the drum coal mining machine in the drum pick mechanical cutting area, and controlling the drum pick mechanism provided on the drum coal mining machine to perform mechanical cutting and coal breaking operations on the first coal body in the drum pick mechanical cutting area, and at the same time controlling the flexible area coal breaking mechanism provided on the drum coal mining machine to perform flexible coal breaking operations on the second coal body in the flexible coal breaking area.

[0009] Furthermore, the step S1 includes:

[0010] Determine the coal seam and roof structure of the coal mining face based on coal seam occurrence information or information collected in real time on site;

[0011] Based on the structure of coal seam and roof, the coal seam below the roof is divided to determine the mechanical cutting area of ​​drum pick, and the coal mining working face is divided to obtain the flexible coal breaking area, wherein the contact surface between the coal seam and the roof is in the flexible coal breaking area.

[0012] Furthermore, the coal mining working face is divided into a drum pick mechanical cutting area and a flexible coal breaking area based on the coal seam information, including:

[0013] Based on the coal seam information, the height H1 of the drum pick mechanical cutting area is determined, and the drum pick mechanical cutting area is obtained by dividing according to the height H1, wherein the height H1 is the average thickness or minimum thickness of the coal seam;

[0014] The height H2 of the flexible coal breaking zone is determined according to the coal seam thickness and the height H1, and the coal mining face is divided according to the height H2 to obtain the flexible coal breaking zone, wherein the height H2 is not less than the difference between the maximum coal seam thickness and the height H1.

[0015] The flexible zone coal breaking mechanism provided on the drum coal mining machine is controlled to perform flexible coal breaking operation on the second coal body in the flexible coal breaking zone, and the process also includes:

[0016] The flexible zone coal breaking mechanism on the drum coal mining machine is adjusted according to the height H2 so that the coal breaking range of the flexible zone coal breaking mechanism covers the flexible coal breaking zone.

[0017] The present invention also discloses a working face partition coal breaking supporting device, which is applied to the above working face partition coal breaking method, and comprises a drum coal mining machine, a drum pick mechanism and a flexible zone coal breaking mechanism;

[0018] The drum pick mechanism comprises: a shearer rocker arm arranged on the drum coal shearer, a shearer cutting drum arranged on the shearer rocker arm, and a shearer cutting drum pick is arranged on the shearer cutting drum;

[0019] The flexible zone coal breaking mechanism includes: a high-pressure pump arranged on the drum coal mining machine, and a plurality of flexible zone high-pressure jet coal breaking nozzles arranged on the drum coal mining machine and / or the coal mining machine rocker arm, wherein each flexible zone high-pressure jet coal breaking nozzle connected to the high-pressure pump faces the flexible coal breaking zone.

[0020] Furthermore, the flexible zone high-pressure jet coal-breaking nozzle includes: a fluid guide and a remotely controllable rotating base, wherein the fluid guide is provided with an outlet facing the flexible coal-breaking zone, and the fluid guide is fixed on the remotely controllable rotating base for rotating under the drive of the remotely controllable rotating base, thereby realizing remote dynamic adjustment of the direction area of ​​the outlet.

[0021] Furthermore, the high-pressure jet coal-breaking nozzle in the flexible zone is a high-pressure medium jet nozzle, and the outlet pressure is greater than the pressure required for coal breaking at the coal mining face, and is not greater than the pressure required for direct roof destruction at the working face;

[0022] The high-pressure pump is a variable-pressure pump with a maximum pump pressure greater than 15MPa.

[0023] The present invention also discloses a working face partition coal breaking supporting device, which is applied to the above working face partition coal breaking method, and comprises a drum coal mining machine, a drum pick mechanism and a flexible zone coal breaking mechanism;

[0024] The drum pick mechanism comprises: a shearer rocker arm arranged on the drum coal shearer, a shearer cutting drum arranged on the shearer rocker arm, and a shearer cutting drum pick is arranged on the shearer cutting drum;

[0025] The flexible zone coal breaking mechanism is an adaptive telescopic cutting assembly, including: an adaptive telescopic cutting drum, a driving motor, and an adaptive telescopic cylinder, wherein the adaptive telescopic cylinder arranged on the drum coal mining machine is mainly composed of a telescopic rod body and a cylinder body, and the adaptive telescopic cutting drum is arranged at the upper end of the telescopic rod body to press against the top plate, so that the adaptive telescopic cutting drum moves with the drum coal mining machine and extends and retracts along the axial direction of the cylinder body; the driving motor is fixedly connected to the telescopic rod body, and the adaptive telescopic cutting drum connected to the output shaft of the driving motor is provided with an adaptive telescopic drum cutting tooth, which is used to perform coal breaking operations on the coal body in the flexible coal breaking zone.

[0026] Furthermore, the adaptive telescopic cylinder is a shock-absorbing telescopic device; the telescopic amount of the adaptive telescopic cylinder is not less than the height of the flexible coal breaking zone.

[0027] Furthermore, the adaptive telescopic cutting assembly also includes a top-contact wheel, wherein the top-contact wheel is coaxially fixed with the adaptive telescopic cutting drum, and the outer diameter of the top-contact wheel is larger than the outer diameter of the cutting circle of the adaptive telescopic drum cutting teeth, so that the top-contact wheel and the top plate are in a pressed state, preventing the adaptive telescopic drum cutting teeth from cutting the top plate.

[0028] The present invention has at least the following beneficial effects:

[0029] The present invention divides the coal mining working face into a rolling pick mechanical cutting area and a flexible coal breaking area, and coal is broken by a flexible coal breaking method on the side close to the roof. The drum coal mining machine only needs to cut the relatively regular coal body in the rolling pick mechanical cutting area below the flexible coal breaking area. There is no need to accurately identify the coal rock, and there is no need for the existing drum coal mining machine cutting arm to frequently adjust the height, which reduces the labor intensity of workers and reduces the occurrence of miscutting. There is no need for real-time transmission of a large amount of camera data, and the requirements for underground ring network parameters of coal mines are relatively low, with strong universality.

[0030] Other beneficial effects of the present invention will be described in detail in the specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a method flow chart of the working face zoning coal breaking method disclosed in Example 1 of the present invention.

[0033] Figure 2 It is a zoning principle diagram of the working face zoning coal breaking method disclosed in Example 1 of the present invention.

[0034] Figure 3 It is a front view structural diagram of the working face partition coal breaking supporting device disclosed in the second embodiment of the present invention.

[0035] Figure 4 It is a side structural diagram of the working face partition coal breaking supporting device disclosed in the second embodiment of the present invention.

[0036] Figure 5 It is a working principle diagram of the working face partition coal breaking supporting device disclosed in the second embodiment of the present invention.

[0037] Figure 6 It is a front view structural diagram of the working face partition coal breaking supporting device disclosed in Example 3 of the present invention.

[0038] Figure 7 It is a side structural diagram of the working face partition coal breaking supporting device disclosed in Example 3 of the present invention.

[0039] Figure 8 It is a working principle diagram of the working face partition coal breaking supporting device disclosed in Example 3 of the present invention.

[0040] Among them, 1-coal seam, 2-roof, 101-drum pick mechanical cutting area, 102-flexible coal breaking area, 3-drum coal mining machine, 301-coal mining machine rocker arm, 302-coal mining machine cutting drum, 303-coal mining machine cutting drum pick, 4-flexible area high-pressure jet coal breaking nozzle, 401-exit port, 402-flow guide body, 403-remote controllable rotating base, 5-high-pressure pump, 6-adaptive telescopic cutting assembly, 601-adaptive telescopic cutting drum, 602-adaptive telescopic drum pick, 6021-top contact wheel, 603-driving motor, 604-adaptive telescopic cylinder, 6041-telescopic rod body, 6042-cylinder body. DETAILED DESCRIPTION

[0041] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0042] At present, although some scholars in this field have studied the high-pressure medium jet coal breaking scheme, the high-pressure medium jet coal breaking efficiency is lower than that of the drum coal mining machine, and the controllability and adaptability of coal breaking are poor. In addition, it relies solely on hydraulic coal breaking, which consumes a large amount of water and has high requirements for the water supply and drainage systems, which can easily cause serious water problems in the working area. Other relevant scholars have studied the high-pressure medium jet-assisted drum coal mining machine coal breaking scheme to weaken the coal body. In order to improve the cutting efficiency, a high-pressure medium jet is sprayed to the coal body directly in front of the cutting teeth to perform weakened auxiliary coal breaking, rather than breaking and recovering the coal body close to the roof.

[0043] The present invention can not only solve various problems existing in the prior art, but also, based on a technical improvement starting point that is completely different from the above-mentioned existing research, breaks through the traditional improvement ideas in this field, effectively avoids the technical defects existing in the above-mentioned research schemes, and has excellent technical effects.

[0044] In order to illustrate the present invention in detail, the following embodiments are specifically disclosed.

[0045] Embodiment 1

[0046] like Figure 1 and Figure 2 As shown, this embodiment discloses a method for breaking coal in different working face zones, including:

[0047] S1: Based on the coal seam information, the coal mining face is divided into a drum pick mechanical cutting area 101 and a flexible coal breaking area 102; wherein the drum pick mechanical cutting area 101 includes a first coal body of overall regular shape, and the bottom surface of the first coal body is the coal seam floor of the coal seam 1; the flexible coal breaking area 102 located above the drum pick mechanical cutting area 101 includes a second coal body in contact with the top plate 2 of the coal mining face;

[0048] S2: Place the drum coal mining machine 3 in the drum pick mechanical cutting area 101, and control the drum pick mechanism provided on the drum coal mining machine 3 to perform mechanical cutting and coal breaking operations on the first coal body in the drum pick mechanical cutting area 101, and at the same time control the flexible area coal breaking mechanism provided on the drum coal mining machine 3 to perform flexible coal breaking operations on the second coal body in the flexible coal breaking area 102.

[0049] Preferably, the step S1 comprises:

[0050] Based on the coal seam occurrence information or the information collected in real time on site, the coal seam 1 and roof 2 structures of the coal mining face are determined;

[0051] Based on the structure of the coal seam 1 and the roof 2, the coal seam 1 below the roof 2 is divided to determine the drum pick mechanical cutting area 101, and the coal mining working face is divided to obtain a flexible coal breaking area 102, wherein the contact surface between the coal seam 1 and the roof 2 is within the flexible coal breaking area 102.

[0052] Preferably, in step S1, the coal mining working face is divided into a drum pick mechanical cutting area 101 and a flexible coal breaking area 102 based on the coal seam information, specifically including:

[0053] Based on the coal seam information, the height H1 of the drum pick mechanical cutting area 101 is determined, and the drum pick mechanical cutting area 101 is obtained by dividing according to the height H1, wherein the height H1 is the average thickness or minimum thickness of the coal seam;

[0054] The height H2 of the flexible coal breaking area 102 is determined according to the thickness of the coal seam 1 and the height H1, and the coal mining face is divided according to the height H2 to obtain the flexible coal breaking area 102, wherein the height H2 is not less than the difference between the maximum thickness of the coal seam 1 and the height H1.

[0055] In some embodiments of the present invention, the height H1 is 1m-8m, and the height H2 is 0-1m.

[0056] In step S2, the flexible zone coal breaking mechanism provided on the drum coal shearer 3 is controlled to perform flexible coal breaking operation on the second coal body in the flexible coal breaking zone 102, which also includes:

[0057] The flexible zone coal breaking mechanism on the drum coal shearer 3 is adjusted according to the height H2 so that the coal breaking range of the flexible zone coal breaking mechanism covers the flexible coal breaking zone 102 .

[0058] After dividing the drum pick mechanical cutting area 101, its height H1 is determined, wherein the height H1 is the average thickness or minimum thickness of the coal seam 1;

[0059] After dividing the flexible coal breaking area 102, its height H2 is determined, wherein the height H2 is not less than the difference between the maximum value of the coal seam thickness and the height H1;

[0060] The step S2 further includes:

[0061] The operating range of the flexible zone coal breaking mechanism is adjusted according to the height H2 to perform coal breaking operations on the coal body in the flexible coal breaking zone 102 .

[0062] This embodiment divides the coal body according to whether its shape is regular or not: a drum pick mechanical cutting area 101 including a first medium with a regular shape and a flexible coal breaking area 102 including a second coal body with an irregular shape, and uses rigid and flexible methods to perform coal breaking operations on the first coal body and the second coal body respectively. In particular, a flexible area coal breaking mechanism is used to break the irregularly shaped second coal body under the top plate 2 of the flexible coal breaking area 102, thereby avoiding the trouble of frequently adjusting the height of the cutting arm of the drum coal mining machine due to the overall operation of the coal seam 1 in traditional coal breaking schemes.

[0063] It is worth mentioning that the flexible zone coal breaking mechanism disclosed in this embodiment can specifically adopt the existing device structure, or the structure disclosed in Embodiment 2 and Embodiment 3. The structure and principle of the existing device will not be described in detail herein.

[0064] Furthermore, the step S1 includes:

[0065] Based on the coal seam occurrence information or the information collected in real time on site, the structure of the coal seam 1 and the roof 2 of the coal mining face is determined. Based on the structure of the coal seam 1 and the roof 2, the coal seam 1 below the roof 2 is divided into a drum pick mechanical cutting area 101 with a regular shape, and the coal mining face is divided into a flexible coal breaking area 102.

[0066] Among them, the contact surface between the coal seam 1 and the roof 2 is in the flexible coal breaking zone 102.

[0067] Furthermore, the step S1 further includes:

[0068] After the drum pick mechanical cutting area 101 is divided, its height H1 is determined, wherein the height H1 is the average thickness or minimum thickness of the coal seam 1 .

[0069] After the flexible coal breaking zone 102 is divided, its height H2 is determined, wherein the height H2 is not less than the difference between the maximum thickness of the coal seam 1 and the height H1.

[0070] The step S2 further includes:

[0071] The operating range of the flexible zone coal breaking mechanism is adjusted according to the height H2 to perform coal breaking operations on the coal body in the flexible coal breaking zone 102 .

[0072] Embodiment 2

[0073] like Figures 3 to 5 As shown, the present invention also discloses a working face partition coal breaking supporting device, which is applied to the working face partition coal breaking method disclosed in Example 1. The device includes a drum coal mining machine 3, a drum pick mechanism and a flexible zone coal breaking mechanism.

[0074] The drum pick mechanism comprises: a shearer rocker arm 301 arranged on the drum coal shearer 3 , a shearer cutting drum 302 arranged on the shearer rocker arm 301 , and a shearer cutting drum pick 303 is provided on the shearer cutting drum 302 .

[0075] The flexible zone coal breaking mechanism includes: a plurality of flexible zone high-pressure jet coal breaking nozzles 4 arranged on the drum coal mining machine 3 and / or the coal mining machine rocker arm 301, and a high-pressure pump 5 arranged on the drum coal mining machine 3, wherein each flexible zone high-pressure jet coal breaking nozzle 4 connected to the high-pressure pump 5 is facing the flexible coal breaking zone 102.

[0076] Furthermore, the device is provided with two drum cutting tooth mechanisms, which are respectively arranged on the left and right sides of the drum coal mining machine 3, and the heights of the two coal mining machine cutting drums 302 are different.

[0077] Further, the flexible zone high pressure jet coal breaking nozzle 4 is arranged on the drum coal mining machine 3 and / or the coal mining machine rocker arm 301;

[0078] The flexible zone high-pressure jet coal-breaking nozzle 4 includes: a flow guide 402 and a remotely controllable rotating base 403, wherein the flow guide 402 is provided with an outlet 401 facing the flexible coal-breaking zone 102, and the flow guide 402 is fixed on the remotely controllable rotating base 403, and is used for rotating under the drive of the remotely controllable rotating base 403, thereby realizing remote dynamic adjustment of the pointing area of ​​the outlet 401.

[0079] Furthermore, the flexible zone high-pressure jet coal-breaking nozzle 4 is a high-pressure medium jet nozzle, and the pressure of the outlet 401 is greater than the pressure required for coal breaking of the coal mining face, and is not greater than the pressure required for direct top destruction of the face. Preferably, the pressure range is between 15MPa and 35MPa, and the outlet flow rate does not exceed 60L / min. Preferably, the high-pressure pump 5 is a variable pressure pump, and the maximum pump pressure is greater than 15MPa.

[0080] Embodiment 3

[0081] like Figures 6 to 8 As shown, the present invention also discloses a working face partition coal breaking supporting device, which is applied to the working face partition coal breaking method, and includes a drum coal mining machine 3, a drum pick mechanism and a flexible zone coal breaking mechanism.

[0082] The drum pick mechanism comprises: a shearer rocker arm 301 arranged on the drum coal shearer 3 , a shearer cutting drum 302 arranged on the shearer rocker arm 301 , and a shearer cutting drum pick 303 is provided on the shearer cutting drum 302 .

[0083] The flexible zone coal breaking mechanism is an adaptive telescopic cutting assembly 6, comprising: an adaptive telescopic cutting drum 601, a driving motor 603, and an adaptive telescopic cylinder 604, wherein the adaptive telescopic cylinder 604 arranged on the drum coal mining machine 3 is mainly composed of a telescopic rod body 6041 and a cylinder body 6042, and the adaptive telescopic cutting drum 601 is arranged at the upper end of the telescopic rod body 6041 to press against the top plate 2, so that the adaptive telescopic cutting drum 601 moves with the drum coal mining machine 3 and extends and retracts axially along the cylinder body 6042; the driving motor 603 is fixedly connected to the telescopic rod body 6041, and the adaptive telescopic cutting drum 601 connected to the output shaft of the driving motor 603 is provided with an adaptive telescopic drum cutting tooth 602, which is used to break the coal body in the flexible coal breaking zone 102.

[0084] Furthermore, the adaptive telescopic cylinder 604 is a shock-absorbing telescopic device; the telescopic amount of the adaptive telescopic cylinder 604 is not less than the height H2 of the flexible coal breaking area 102 .

[0085] Furthermore, the adaptive telescopic cutting assembly 6 further includes a top contact wheel 6021, wherein the top contact wheel 6021 is coaxially fixed with the adaptive telescopic cutting drum 601, and the outer diameter of the top contact wheel 6021 is larger than the outer diameter of the cutting circle of the adaptive telescopic drum cutting teeth 602, so that the top contact wheel 6021 and the top plate 2 are in a pressed state to prevent the adaptive telescopic drum cutting teeth 602 from cutting the top plate 2. Preferably, the top contact wheel 6021 is made of rubber.

[0086] It can be seen from the above embodiments that the present invention uses two types of equipment, namely a drum pick mechanism and a flexible zone coal breaking mechanism, to operate in different coal breaking modes. Among them, the traditional cutting and breaking coal operation mode has the advantages of fast cutting speed, good stability and high reliability, but in actual operation, facing the situation of a hard roof with twists and turns, this mode has the problem of sparks generated by cutting the top to ignite gas and severe wear of the cutting teeth. The flexible coal breaking operation mode adopted by the flexible zone coal breaking mechanism disclosed in the present invention has a slow hydraulic coal mining mode, poor cutting stability, and hydraulic coal mining is prone to cause serious waterlogging in the mining area, and is easy to form coal slime with coal, which is not easy to handle. However, in the face of a small part of the irregularly shaped coal body in the patent of the present invention, by reasonably installing and arranging a small number of high-pressure jet coal breaking nozzles, and making its jet strike range cover the flexible coal breaking zone, it can well reduce the hard cutting of the pick and the roof, and reduce the generation of sparks. The present invention comprehensively considers the advantages and disadvantages of various coal breaking methods, takes advantage of their strengths and avoids their weaknesses, and creatively and reasonably allocates corresponding areas (i.e., the drum pick mechanical cutting area 101 and the flexible coal breaking area 102) for different operating methods. Compared with traditional single / combination coal breaking operations, the present invention can ensure coal mining efficiency and stability while taking into account the safe and effective recovery of the adjacent coal body below the boundary line between the roof and the tortuous changes of the coal body, prevents sparks from igniting gas and spontaneous combustion of coal left in the goaf, and avoids waste of coal resources. It can be seen that the technical effect achieved by the present invention is remarkable.

[0087] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for coal breaking by division in a working face, characterized in that: include: S1: Based on the coal seam information, the coal mining face is divided into a drum pick mechanical cutting area and a flexible coal breaking area; wherein the drum pick mechanical cutting area includes a first coal body of overall regular shape, and the bottom surface of the first coal body is the coal seam floor of the coal seam; the flexible coal breaking area located above the drum pick mechanical cutting area includes a second coal body in contact with the top plate of the coal mining face; S2: placing the drum coal shearer in the drum pick mechanical cutting area, and controlling the drum pick mechanism provided on the drum coal shearer to perform mechanical cutting and coal breaking operations on the first coal body in the drum pick mechanical cutting area, and at the same time controlling the flexible area coal breaking mechanism provided on the drum coal shearer to perform flexible coal breaking operations on the second coal body in the flexible coal breaking area; Wherein, the coal mining working face is divided into a drum pick mechanical cutting area and a flexible coal breaking area based on the coal seam information, including: Determine the coal seam and roof structure of the coal mining face based on coal seam occurrence information or information collected in real time on site; Based on the structure of coal seam and roof, the coal seam below the roof is divided to determine the mechanical cutting area of ​​the drum pick, and the coal mining working face is divided to obtain the flexible coal breaking area; among which, the contact surface between the coal seam and the roof is in the flexible coal breaking area; Based on the coal seam information, the coal mining face is divided into a drum pick mechanical cutting area and a flexible coal breaking area, which specifically include: Based on the coal seam information, the height H1 of the drum pick mechanical cutting area is determined, and the drum pick mechanical cutting area is obtained by dividing according to the height H1, wherein the height H1 is the average thickness or minimum thickness of the coal seam; Determine the height H2 of the flexible coal breaking zone according to the coal seam thickness and the height H1, and divide the coal mining face according to the height H2 to obtain the flexible coal breaking zone, wherein the height H2 is not less than the difference between the maximum coal seam thickness and the height H1; The flexible zone coal breaking mechanism provided on the drum coal mining machine is controlled to perform flexible coal breaking operation on the second coal body in the flexible coal breaking zone, and the process also includes: The flexible zone coal breaking mechanism on the drum coal mining machine is adjusted according to the height H2 so that the coal breaking range of the flexible zone coal breaking mechanism covers the flexible coal breaking zone.

2. A working face partition coal breaking supporting device, characterized in that: The device is applied to the working face zone coal breaking method as claimed in claim 1, and the device comprises a drum coal mining machine, a drum pick mechanism and a flexible zone coal breaking mechanism; The drum pick mechanism comprises: a shearer rocker arm arranged on the drum coal shearer, a shearer cutting drum arranged on the shearer rocker arm, and a shearer cutting drum pick is arranged on the shearer cutting drum; The flexible zone coal breaking mechanism is an adaptive telescopic cutting assembly, including: an adaptive telescopic cutting drum, a driving motor, and an adaptive telescopic cylinder, wherein the adaptive telescopic cylinder arranged on the drum coal mining machine is mainly composed of a telescopic rod body and a cylinder body, and the adaptive telescopic cutting drum is arranged at the upper end of the telescopic rod body to press against the top plate, so that the adaptive telescopic cutting drum moves along the cylinder body axially; the driving motor is fixedly connected to the telescopic rod body, and an adaptive telescopic drum cutting tooth is arranged on the adaptive telescopic cutting drum connected to the output shaft of the driving motor, which is used to break the coal body in the flexible coal breaking zone; The adaptive telescopic cylinder is a shock-absorbing telescopic device; the telescopic amount of the adaptive telescopic cylinder is not less than the height of the flexible coal breaking area; The adaptive telescopic cutting assembly also includes a top-contact wheel, wherein the top-contact wheel is coaxially fixed with the adaptive telescopic cutting drum, and the outer diameter of the top-contact wheel is larger than the outer diameter of the cutting circle of the adaptive telescopic drum cutting teeth, so that the top-contact wheel and the top plate are in a pressed state, preventing the adaptive telescopic drum cutting teeth from cutting the top plate.

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