A high-yield and high-efficiency production method for a first-mining working face of a coal mine

Abstract

The present application belongs to the field of coal mining, and particularly relates to a high-yield and high-efficiency production method for a first-mining working face of a coal mine. The method first arranges a fully-mechanized mining face based on a traditional first-mining face arrangement mode, and designs the coal seam between the track roadway of the fully-mechanized mining face and the coal seam outcrop as a matching mining face. The matching mining face uses a spiral drill coal mining machine and a single hydraulic prop to cooperate with mining according to different thicknesses, or uses a spiral drill coal mining machine to mine at intervals according to a thin coal seam mining process, and simultaneously detects when the spiral drill coal mining machine is used to mine coal, so as to determine a suitable drilling and mining width of the coal seam, and form a matching mining face with a variable width. The entire matching mining face does not need to excavate any roadway, but only needs to use the track roadway of the fully-mechanized mining face as a working space, and does not need to drill, and completely does not affect the production time of the fully-mechanized mining face and the yield and efficiency during normal production. The method used in the present application has low investment, and can improve the coal recovery rate and increase economic benefits without affecting the fully-mechanized mining face.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of coal mining, and particularly relates to a high-yield and high-efficiency production method for a first-mining working face of a coal mine. BACKGROUND

[0002] The first-mining working face generally refers to a working face first mined in a mining area in coal mining, and is located at the highest elevation of the mining area, i.e. at the shallowest depth in the mining area. If the mining area is located at a first mining level, the first-mining working face with the shallowest depth in the mining area is usually close to the outcrop of the coal seam, i.e. close to the shallowest part of the development of the coal seam. The thickness of the coal seam close to the outcrop generally varies greatly and is greatly affected by weathering.

[0003] At present, the coal mining in China has been basically mechanized, and the fully-mechanized coal mining technology is generally used, which has the advantages of high yield, high efficiency and safety, and the disadvantage of being limited by the fully-mechanized coal mining equipment and related supporting equipment. A set of fully-mechanized coal mining equipment is generally only suitable for mining the coal seam within a certain height range, such as 4.0-5.0 m, and if the thickness of the coal seam varies greatly and is less than 4.0 m, a set of fully-mechanized coal mining equipment needs to be replaced.

[0004] However, in many cases, the thickness of the entire coal seam may only vary greatly close to the outcrop of the coal seam, and the development shape is irregular. Obviously, it is a case of more investment than output to separately purchase a set of fully-mechanized coal mining equipment for mining the coal at this position. Meanwhile, the range of the coal at this position is not large enough to arrange a fully-mechanized working face. In addition, each mining area has carried out long-term development and preparation work before the recovery of the first-mining working face, and a large amount of manpower and material resources have been invested. It is hoped that the first-mining working face can be put into production as soon as possible, and a large amount of coal can be produced as soon as possible to achieve economic benefits. Therefore, in actual production, the first-mining working face is arranged at a certain distance away from the outcrop of the coal seam where the coal seam develops stably and is far away from the outcrop. The coal seam between the first-mining working face and the outcrop has a great thickness variation and is irregular, and is abandoned.

[0005] However, it is very regrettable to abandon the coal between the first-mining working face and the outcrop. There is almost no possibility of re-mining in the later period. Therefore, it is of great significance to recover this part of the coal under the premise of low investment and high production efficiency. SUMMARY

[0006] In view of the problem of resource waste caused by abandoning the coal between the first-mining working face and the outcrop in the prior art, the present application arranges the coal between the first fully-mechanized working face and the outcrop of the coal seam into an irregular auxiliary working face when the first-mining working face is arranged. The auxiliary working face is mined by a screw drill coal mining machine, which can ensure high production efficiency on the basis of low investment. Specifically, the high-yield and high-efficiency production method for the first-mining working face of a coal mine mainly includes the following steps:

[0007] S1, based on the overall thickness of the mined coal seam and the mine design capacity, selecting appropriate hydraulic support, drum shearer and scraper conveyor;

[0008] Based on the selected hydraulic support and drum shearer, determine the minimum mining height of the fully mechanized face, near the outcrop side of the coal seam, along the strike, design the position where the thickness of the coal seam is basically greater than the minimum mining height of the fully mechanized face as the track roadway of the fully mechanized face; based on the length of the scraper conveyor and the design capacity of the mine, determine the width of the fully mechanized face, and further determine the position of the transportation roadway;

[0009] Excavate the transportation roadway and the track roadway, and based on the designed cut position, excavate the cut to connect the transportation roadway and the track roadway; arrange hydraulic supports, drum shearer and scraper conveyor in the cut;

[0010] Preferably, in step S1, a telescopic belt conveyor is arranged in the transportation roadway, and the scraper conveyor is connected with the telescopic belt conveyor through a transfer machine.

[0011] S2, design the mineable coal body between the track roadway and the coal seam outcrop as a matching face, the length of the matching face is consistent with the length of the fully mechanized face; arrange a screw drill coal mining machine at the intersection of the cut and the track roadway, and use a transfer conveyor at the coal outlet of the screw drill coal mining machine to overlap with the scraper conveyor of the fully mechanized face;

[0012] Preferably, in step S2, the mineable coal body refers to the coal body which is not weathered and the thickness of which decreases little along the tendency direction compared with the position of the track roadway.

[0013] Preferably, in step S2, the leading screw drill coal mining machine is arranged with a chamber near the side of the track roadway close to the matching face for storing the screw drill rod for the screw drill coal mining machine; the chamber is arranged at the position where the thickness of the coal seam of the matching face is thin.

[0014] S3, the fully mechanized face uses the drum shearer to mine coal, and the matching face uses the screw drill coal mining machine to drill coal.

[0015] Preferably, for the matching face, when the thickness of the coal seam is uniform and large, the recovery progress of the matching face is consistent with that of the fully mechanized face, and single hydraulic support is used in the matching face to cooperate with the metal hinged roof beam for support.

[0016] Preferably, when the matching face uses the screw drill coal mining machine to drill coal, based on the drilling phenomenon, the drilled area is judged, and when a large amount of rock or weathered coal seam is drilled, the drilling is stopped, and the number of single hydraulic supports is adjusted in real time according to the mining width of the matching face.

[0017] Preferably, drill and mine from top to bottom in the height direction.

[0018] Preferably, for the matching mining face, when the thickness of the coal seam is small, the matching mining face is ahead of the fully mechanized mining face in the mining progress, the matching mining face drills the coal body along the strike interval, forms a drilled mined-out area and a support coal pillar, and the drilled mined-out area is supported through the support coal pillar.

[0019] Preferably, when the matching mining face drills the coal by using the screw drill mining machine, the drilled region is judged based on the drilling phenomenon, and the drilling is stopped when a large amount of rock stratum or weathered zone of the coal seam is drilled.

[0020] Preferably, the drilling is from top to bottom in the height direction.

[0021] The beneficial technical effect of the present application is that: the present application firstly arranges the fully mechanized mining face based on the traditional first mining face arrangement mode, and designs the coal seam between the track roadway of the fully mechanized mining face and the coal seam outcrop as the matching mining face, the matching mining face is mined by using the screw drill mining machine and the single hydraulic prop according to the thickness, or is mined by using the screw drill mining machine interval according to the thin coal seam mining technology, and the detection is carried out at the same time when the coal is mined by using the screw drill mining machine, so as to determine the suitable drilling and mining width of the coal seam, and form the matching mining face with variable width; the whole matching mining face does not need to excavate any roadway, only needs to use the track roadway of the fully mechanized mining face as the working space, and does not need to drill, which does not affect the production time of the fully mechanized mining face and the yield and efficiency in the normal production. The method used in the present application has low investment, and can improve the coal recovery rate and increase the economic benefit without affecting the fully mechanized mining face. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is the first mining face arrangement schematic diagram (when the single hydraulic prop is arranged) in the embodiment of the present application;

[0023] Figure 2 is Figure 1 the partial enlarged view in the middle;

[0024] Figure 3 is the first mining face arrangement schematic diagram (when the support coal pillar is left) in the embodiment of the present application;

[0025] Figure 4 is Figure 3 the partial enlarged view in the middle;

[0026] In the figure, the fully mechanized mining face 1; the matching mining face 2; the transportation roadway 3; the track roadway 4; the hydraulic support 5; the scraper conveyor 6; the telescopic belt conveyor 7; the transfer conveyor 8; the screw drill mining machine 9; the single hydraulic prop 10; the metal hinged roof beam 11; the drilled mined-out area 12; the support coal pillar 13; the chamber 14; the mined-out area 15. DETAILED DESCRIPTION

[0027] Yuzhou coalfield Liangbei No.2 Mine is one of the large-scale key mines planned to be mined by Pingdingshan Coal Group recently. According to the preliminary design scheme of the mine construction, the mine is planned to have an annual production capacity of 1.2 million tons per year. The Liangbei No.2 Mine is a concealed one and its bedrock is all covered by Neogene and Quaternary System. According to the geological exploration, there are 4 mineable coal seams in the mine, the No.2-1 coal seam is mineable in the whole area, the No.4-6 coal seam is mineable in most of the area, the No.2-3 and No.7-2 coal seams are mineable in some areas. The development characteristics of the mineable coal seams are shown in Table 1. The No.2-1 and No.2-3 coal seams are black, the No.4-6 coal seam is blackish brown and the No.7-2 coal seam is grayish black. The No.2-1 and No.2-3 coal seams are mainly in powder form and secondly in flaky form. The No.4-6 and No.7-2 coal seams are mainly in granular form and secondly in massive form. The coal seams are compacted into massive form by pressure and are easily broken by a finger pressure and have squeezing and rubbing phenomena. The apparent density, true density and porosity of the coal seams are shown in Table 2.

[0028] The No.2-1 coal seam occurs at the bottom of Shanxi Formation and is 45-70 m away from the Shaguoyao sandstone with an average distance of 60 m. The immediate roof of the No.2-1 coal seam is mainly mudstone and sandy mudstone and partly fine and medium grained sandstone. The floor is mainly mudstone and sandy mudstone and occasionally fine and powder sandstone or carbonaceous mudstone false floor. The coal seam is 0.42-12.50 m thick with an average of 5.08 m. There are 1-3 partings with a thickness of 0.06-0.64 m and the parting is carbonaceous mudstone. The No.2-1 coal seam has simple structure and the mineability index (K) is 94.1% and the thickness variation coefficient (γ) is 53.4%. The coal seam is a relatively stable thick seam and is mineable in the whole area. The No.2-1 coal seam is 350-1215 m deep and occurs at-245--1100 m elevation. The No.2-1 coal seam is the thickest and shallowest seam among the 4 mineable coal seams and thus is selected as the first mining seam of the mine.

[0029] The Liangbei No.2 Mine has not started production yet and is still in the stage of development and preparation of the mine construction. The first mining area is located at the first mining level and close to the main and auxiliary shafts in order to start production as soon as possible. The longwall fully mechanized coal mining technology is applied to the mining of the mine. According to the minimum thickness of 4.2 m of the coal seam that can be mined by the fully mechanized mining equipment, the upper limit of the first mining face of the first mining area can be determined. However, there is a part of the area between the upper limit of the first mining face and the outcrop of the coal seam with a large thickness (more than 3.0 m on average) and irregular shape. Influenced by the fully mechanized mining equipment and the requirement of starting production as soon as possible and high efficient production of the mine, the part of the coal will be abandoned according to the conventional way, which does not meet the requirement of saving resources and will cause huge economic loss.

[0030] Table 1 List of occurrence of mineable coal seams

[0031]

[0032] Table 2 List of apparent density, true density and porosity of mineable coal seams

[0033]

[0034] Note: the data in the table is

[0035] For the above problems, our company through research to come up with a solution, both can guarantee the overall first fully mechanized working face production efficiency, and can recovery first fully mechanized working face and outcrop between part of the recoverable coal, not waste resources at the same time can produce greater economic benefits. Liangbei No. 2 well specific to the first mining face high yield and efficient production method, reference Figures 1-4 , the specific steps are as follows:

[0036] S1, based on the overall thickness of the mined coal seam 2 and the design capacity of the mine, select the appropriate fully mechanized equipment, including hydraulic support 5, drum shearer (not shown in the figure) and scraper conveyor 6;

[0037] Based on the selected hydraulic support 5 and drum shearer, the minimum mining height of the fully mechanized mining can be determined as 4.2m. In the side close to the outcrop of coal seam 2, the position of the elevation with a thickness greater than 4.2m along the strike is taken as the shallowest mining boundary of the first mining area, which is also the shallowest mining boundary of the first fully mechanized working face (referred to as fully mechanized face 1). The mining boundary is designed as the position of the track roadway 4. The width of the fully mechanized face 1 is determined based on the length of the scraper conveyor 6 and the design capacity of the mine. The width of the fully mechanized face 1 does not include the width of the transport roadway 3 and the track roadway 4 on both sides of the fully mechanized face. In the embodiment of the present application, the width of the fully mechanized face 1 is about 180m, and the position of the transport roadway 3 can be determined accordingly.

[0038] The position of the track roadway 4 of the first mining face in the traditional fully mechanized mining (which basically corresponds to the fully mechanized face 1 of the present application) is generally lower than the designed position of the track roadway 4 in the present application, so as to make the thickness of the coal seam in the first mining face as large as possible, increase the amount of coal mined per unit time, and reduce the adjustment frequency of the hydraulic support 5 and the drum shearer during mining. Moreover, the coal between the track roadway 4 and the outcrop is not mined.

[0039] The transport roadway 3 and the track roadway 4 are excavated, and the cut is excavated based on the designed position to connect the transport roadway 3 and the track roadway 4. The hydraulic support 5, the drum shearer and the scraper conveyor 6 are arranged in the cut, the telescopic belt conveyor 7 is arranged in the transport roadway 4, the scraper conveyor 6 is connected with the telescopic belt conveyor 7 through the transfer machine (not shown in the figure), and a longwall fully mechanized coal mining face, i.e. the fully mechanized face 1, is formed. The arrangement of the hydraulic support 5, the drum shearer, the scraper conveyor 6, the telescopic belt conveyor 7 and their related supporting equipment belongs to the prior art, and will not be described here.

[0040] S2, for the track roadway 4 and the outcrop between the coal, here refers to the weathering (coal outcrop of coal generally weathering effect is not worth mining), and the coal seam thickness along the tendency direction compared with the track roadway is not reduced, the track roadway 4 and the outcrop between the coal is designed as the matching mining face 2, the length of the matching mining face is consistent with the length of the fully mechanized mining face 1, and the length is about 820 m in the preliminary design;

[0041] A screw drill coal mining machine 9 is arranged at the intersection of the cut and the track roadway 4, the screw drill coal mining machine 9 is a screw drill coal mining machine 9 used in the prior art for mining thin coal seams, the matching mining face 2 is drilled by the screw drill coal mining machine 9, the screw drill coal mining machine 9 is connected with the scraper conveyor 6 of the fully mechanized mining face 1 at the coal outlet of the screw drill coal mining machine 9, so as to transfer the coal drilled in the matching mining face to the scraper conveyor 6; the screw drill coal mining machine 9 is arranged in the chamber 14 near the matching mining face on the side close to the track roadway 9, and the chamber 14 is used for storing the screw drill rod of the screw drill coal mining machine 9; the chamber 14 is preferably arranged at a position where the thickness of the coal seam of the matching mining face is relatively thin; the transfer conveyor 8 can be a transfer machine or a scraper conveyor;

[0042] S3, the fully mechanized mining face 1 adopts the drum coal mining machine to mine coal, and the matching mining face 2 adopts the screw drill coal mining machine 9 to drill coal, the coal drilled is transferred to the self-scraper conveyor 6 through the transfer conveyor 8, and is transported out together with the coal mined in the fully mechanized mining face 1 through the transfer machine and the telescopic belt conveyor 7; a three-shift work system is adopted, and two shifts are used for mining and one shift is used for maintenance;

[0043] The average mining height of the fully mechanized mining face 1 is 4.8 m, and each shift of the coal mining shift mines 2 cuts of coal; according to the cutting depth 0.8 m of the drum coal mining machine, the fully mechanized mining face 1 can be advanced by 3.2 m per day; according to Table 2, the density of the coal seam of the second 1 coal seam is 1.34 t / m 3 According to the width 180 of the fully mechanized mining face 1, about 3704 t of coal can be mined per day, the mine produces all the year round, coal can be mined every day except for the time for moving the working face, according to 30 days of average time for moving the working face and 5 days of special situation of stopping production, the production time per year is about 330 days, and a total of 122.3 million tons of coal can be produced, which meets the design capacity of 120 million tons.

[0044] As Figures 1-2As shown, for the matching mining face 2, when the coal seam thickness is uniform and large, the thickness of the matching mining face in the embodiment is large, that is, the thickness is between 2.7-4.2m, the recovery progress of the matching mining face 2 is consistent with that of the fully mechanized mining face 1, and the single hydraulic prop 10 and the metal hinged roof beam 11 are arranged in the matching mining face 2; specifically, 3-4 rows of single hydraulic props 10 are arranged along the strike, and a plurality of columns of single hydraulic props 10 are arranged along the inclination, the single hydraulic props 10 in each column are connected through the metal hinged roof beam 11, the metal hinged roof beam 11 supports the coal seam roof, and the single hydraulic prop 10 stands on the coal seam floor; the number of columns of single hydraulic props 10 is adjusted in real time according to the mining width of the matching mining face, when the matching mining face 2 is drilled and mined by the auger miner 9, the drilled and mined area is judged based on the drilling and mining phenomenon, that is, the auger miner 9 not only drills and mines coal but also plays a drilling role; when a large amount of rock stratum or weathered zone of the coal seam is drilled, the drilling is stopped, and the drilling of a large amount of rock indicates that the thickness of the coal seam is obviously thinned; in the embodiment of the application, the auger miner 9 selects a drilling diameter (diameter) of about 1.0m, the average footage of single drilling along the strike is 0.8m, which is matched with the fully mechanized mining face 1, the single drilling thickness in the height direction is between 0.8-0.9m, the drilling and mining are performed from top to bottom, and the drilled and mined area 12 is supported by the single hydraulic prop 10 and the metal hinged roof beam 11.

[0045] As shown, Figures 3-4 when the thickness of the coal seam is small, that is, the thickness of the matching mining face in the embodiment is between 1.0-2.7m, the recovery progress of the matching mining face 2 is ahead of that of the fully mechanized mining face 1, and the mining technology of the auger miner 9 for mining thin coal seams is referred to for mining, the coal body is drilled and mined along the strike at intervals to form the drilled and mined area 12 and the support coal pillar 13, the width of the drilled and mined area is 3.2m, the width of the support coal pillar 13 is 0.8m, and the support coal pillar 13 is preferably arranged at a position where the thickness of the coal seam is thin. The distance by which the recovery progress of the matching mining face 2 is ahead of that of the fully mechanized mining face 1 can make the fully mechanized mining face 1 recover to the support coal pillar 13 before the support coal pillar 13 is basically stable, at least ensure the safe recovery of the auger miner 9, and at the same time, when the fully mechanized mining face 1 recovers to be directly opposite to a certain support coal pillar 13, the support coal pillar 13 is unstable, and a mined-out area 15 is formed as in the rear of the fully mechanized mining face 1. The mining width of the matching mining face is adjusted in real time, when the matching mining face 2 is drilled and mined by the auger miner 9, the drilled and mined area is judged based on the drilling and mining phenomenon, that is, the auger miner 9 not only drills and mines coal but also plays a drilling role; when a large amount of rock stratum or weathered zone of the coal seam is drilled, the drilling is stopped, and the drilling of a large amount of rock indicates that the thickness of the coal seam is obviously thinned; in the embodiment of the application, the auger miner 9 selects a drilling diameter (diameter) of about 1.0m, the average footage of single drilling along the strike is 0.8m, which is matched with the fully mechanized mining face 1, the single drilling thickness in the height direction is between 0.8-1.0m, the drilling and mining are performed from top to bottom, and the drilled and mined area 12 is supported by the single hydraulic prop 10 and the metal hinged roof beam 11. When the thickness of the coal seam of the matching mining face is less than 1.0m, it is not necessary to be mined.

[0046] In addition, in order to improve the working environment of the screw drill coal mining machine 9 operator of the combined mining face 2, the advanced screw drill coal mining machine 9 constructs a working chamber (not shown in the figure) on the coal wall of the track roadway 4, and a ventilation borehole is constructed from the transportation roadway to the working chamber, so that the air in the transportation roadway 3 can reach the working chamber through the ventilation borehole.

[0047] The expected increased economic benefits are as follows: the combined mining face 2 does not increase any roadway, and only needs to use the track roadway of the fully mechanized mining face as a working space, without increasing the tunneling workload, and the combined mining face does not need to conduct drilling, and can use the screw drill coal mining machine 9 to mine and explore at the same time, without increasing the drilling workload; therefore, the production time of the fully mechanized mining face is not affected, and the yield and efficiency during normal production are not affected.

[0048] Economically: the additional equipment required mainly includes the screw drill coal mining machine 9, the single hydraulic prop 10, and the transfer conveyor 8, wherein the cost of the screw drill coal mining machine 9 is much lower than that of the drum coal mining machine of the fully mechanized mining face, the price of the single hydraulic prop 10 is much lower than that of the hydraulic support, and the single hydraulic prop is needed during roadway tunneling, temporary support, and support during roadway production, and can be used for these production processes in the later period, so that the actual additional equipment is only the screw drill coal mining machine 9 and the transfer conveyor 8, and the total loss of the two devices and the single hydraulic prop is expected to be 10 million yuan, the production cost of the combined mining face is expected to be 50 yuan / t, assuming that the average width of the combined mining face is 62 m, the mining height is 3.5 m, the length of the working face is 820 m, the density is 1.34 t / m 3 , and the total coal that can be mined by the combined mining face is about 238,400 tons according to the market price of 800 yuan / t, the direct economic benefit is 1,907,500 yuan, and after deducting the ton coal production cost caused by the equipment investment and manpower, the expected income is 1,688,300 yuan.

[0049] Of course, the above description is only for the preferred embodiments of the present application, and the present application is not limited to the above-described embodiments, and it should be noted that any person skilled in the art can make all equivalent replacements and obvious modifications under the guidance of the present application, which all fall within the scope of the present application, and should be protected by the present application.

Claims

1. A high-yield and high-efficiency production method for the first mining face of a coal mine, characterized in that, Includes the following steps: S1. Based on the overall thickness of the coal seam being mined and the designed production capacity of the mine, select appropriate hydraulic supports, drum mining machines and scraper conveyors; Based on the selected hydraulic support and drum shearer, the minimum mining height of the fully mechanized mining face is determined to be 4.2m; on the side close to the coal seam outcrop, along the strike, the position where the coal seam thickness is basically greater than the minimum mining height of the fully mechanized mining face is designed as the fully mechanized mining face track roadway; based on the length of the scraper conveyor and the mine's designed production capacity, the width of the fully mechanized mining face is determined, and then the location of the fully mechanized mining face transport roadway is determined. The fully mechanized mining face transport roadway and the fully mechanized mining face track roadway are excavated, and a cut-hole is excavated based on the designed cut-hole position to connect the fully mechanized mining face transport roadway and the fully mechanized mining face track roadway; hydraulic supports, drum coal mining machines and scraper conveyors are arranged in the cut-hole; An extendable belt conveyor is installed in the transport roadway of the fully mechanized mining face. The scraper conveyor is connected to the extendable belt conveyor through a transfer machine. S2, the mineable coal body between the fully mechanized mining face track roadway and the coal seam outcrop is designed as a secondary mining face, the length of which is the same as the length of the fully mechanized mining face; the secondary mining face does not have a separate roadway and cut-out; a spiral drilling coal mining machine is arranged at the intersection of the cut-out and the fully mechanized mining face track roadway, and the coal outlet of the spiral drilling coal mining machine is connected to the scraper conveyor of the fully mechanized mining face by a transfer conveyor; In S3, the fully mechanized mining face uses a drum shearer, while the auxiliary mining face uses a spiral drilling rig. The mined coal is transferred to a scraper conveyor via a transfer conveyor, and then transported out together with the coal mined from the fully mechanized face via a transfer conveyor and a retractable belt conveyor. For the auxiliary mining face, when the coal seam thickness is uniform and relatively large, between 2.7 and 4.2 meters, the mining progress of the auxiliary mining face is consistent with that of the fully mechanized mining face. The mining face is supported by a combination of single hydraulic props and metal articulated roof beams. When the coal seam thickness is small, between 1.0 and 2.7 m, the mining progress of the mining face is ahead of that of the fully mechanized mining face. The mining face is drilled intermittently along the strike of the mining face to form drill holes and supporting coal pillars. The drill holes are supported by the supporting coal pillars. The mining width of the mining face is adjusted in real time, and the number of rows of single hydraulic props is adjusted in real time according to the mining width of the mining face. When the mining face is drilled with a spiral drilling rig, the drilling area is judged based on the drilling phenomena. The spiral drilling rig also plays a role in exploration. Drilling is stopped when a large amount of rock strata are encountered, indicating that the coal seam thickness has become significantly thinner, or when a weathered coal seam is encountered. In the direction of coal seam thickness, drilling is carried out from top to bottom. When the coal seam thickness of the mining face is less than 1.0 m, no mining is required. To improve the working environment of operators of the spiral drilling coal mining machine in the fully mechanized mining face, the advanced spiral drilling coal mining machine constructs a working chamber in the coal wall of the fully mechanized mining face track roadway. Ventilation boreholes are drilled from the fully mechanized mining face transport roadway along the coal seam to this working chamber, so that the air in the fully mechanized coal transport roadway can reach the working chamber through the ventilation boreholes.

2. The high-yield and high-efficiency production method for the first mining face of a coal mine according to claim 1, characterized in that, The mineable coal seam refers to the coal seam that is not weathered and whose thickness is not significantly reduced along the dip direction compared to the track level roadway.

3. The high-yield and high-efficiency production method for the first mining face of a coal mine according to claim 1, characterized in that, In step S2, the advanced spiral drilling coal mining machine has a chamber arranged on the side of the track level roadway near the mining face to store the spiral drill rods of the spiral drilling coal mining machine.

4. The high-yield and high-efficiency production method for the first mining face of a coal mine according to claim 3, characterized in that, In step S2, the chamber for storing the auger drill rod is located in a section of the coal seam where the coal seam thickness is relatively thin.

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