CN111963194B - Roadway arrangement method based on irregular mining area - Google Patents
Roadway arrangement method based on irregular mining area Download PDFInfo
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- E—FIXED CONSTRUCTIONS
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Abstract
The invention relates to a roadway arrangement method based on irregular mining areas, which is characterized in that the roadways are reasonably arranged according to the mining area shape of a medium-thickness coal seam, and when the roadways are tunneled, a third roadway, a connecting roadway and a fourth roadway are tunneled by setting a tunneling middle point, so that the length of a working face is changed, and the sum of the areas of a plurality of rectangular mining areas in the mining area range is maximum. The design of the mining area can simplify a roadway system, effectively reduce the coal loss, improve the coal extraction rate, fully utilize coal resources, ensure and prolong the mining period of a coal face and the mining area, reduce the tunneling rate, have good safety condition and improve various economic indexes.
Description
Technical Field
The invention relates to the technical field of coal mining, in particular to an arrangement method of stoping roadways in irregular mining areas based on coal field boundaries.
Background
When the coal field is divided into a well field, natural conditions such as large faults, rivers, railways, industrial fields and the like are mainly used as boundaries of the well field. This results in irregular periods or zones during the division of the field into periods or zones. Due to the influence of geological conditions, a large number of irregular and corner areas are difficult to recover. At present, the method mainly takes a room and a pillar type as a main part during the recovery of irregular areas, and has the disadvantages of low recovery rate, serious resource waste and many potential safety hazards. In order to control the destruction of resources and improve the recovery rate, the state has adopted a forced resource integration measure to improve the mechanization degree and push wall-type coal mining.
Coal resources are non-renewable resources, and the nation pays more and more attention to improving the recovery rate, so the coal resources have important profound significance for improving the recovery rate of resources. Firstly, the service life of a mine can be prolonged, more coal resources can be recovered, the economic benefit and the social benefit of a coal mine are improved, the sustainable development of the coal mine is ensured, and benefits are brought to descendants. And secondly, the improvement of the recovery rate of raw coal can reduce the production cost of each ton of coal, the tunneling rate and the like, can directly increase the number of workers and improve the labor enthusiasm of the workers. And thirdly, the loss of raw coal is reduced, the spontaneous combustion ignition of the coal can be avoided, and the safe production of a mine is facilitated. Research and exploration on the recovery process and technical management of the irregular mining area are of great significance for improving the recovery rate of mine resources and prolonging the service life of mines.
Disclosure of Invention
Therefore, the invention provides a roadway arrangement method based on irregular mining areas, which is used for overcoming the problem of low mining efficiency when mining is carried out on the irregular mining areas in the prior art.
In order to achieve the purpose, the invention provides a roadway arrangement method based on irregular mining areas, which comprises the following steps:
step 1: acquiring the mining area shape of the medium-thickness coal seam;
step 2: setting the initial position, the end point position and the trend of a first roadway and the initial position, the end point position and the trend of a second roadway according to the mining area shape of the medium-thickness coal seam, wherein the trend of the first roadway and the trend of the second roadway are arranged in parallel;
and step 3: determining the position of a tunneling intermediate point according to the number of preset tunneling intermediate points so as to maximize the sum of areas of a plurality of rectangular mining areas in a mining area range, wherein the rectangular mining areas are defined by a working face where the tunneling intermediate point is located, a working face where the initial position of a first roadway is located, a working face where the end position of the first roadway is located, the trend of the first roadway and the trend of a second roadway, the number of the tunneling intermediate points is one or more, and the working face where the tunneling intermediate point is located, the working face where the initial position of the first roadway is located and the working face where the end position of the second roadway is located are all perpendicular to the trend of the first roadway;
and 4, step 4: and according to the plurality of rectangular mining areas, setting the edges of the plurality of rectangular mining areas along the trend of the first roadway into a third roadway and a fourth roadway, and setting a connecting roadway according to the position of a middle point of roadway excavation, wherein the connecting roadway is used for connecting the third roadway and the fourth roadway.
Further, when the tunnel is tunneled, the method comprises the following steps:
tunneling from the initial position of the first tunnel along the trend of the first tunnel until the working face of the middle tunneling point of the tunnel is located so as to complete the tunneling of a third tunnel;
the preset length is backed off, and the heading is carried out on the intersection point of the working face where the fourth roadway and the heading middle point are located from the position after the back-off so as to complete the heading of the connected roadway;
and tunneling from the intersection point of the working surface where the intermediate point of the fourth roadway and the roadway is located along the trend of the first roadway until the working surface where the end point of the first roadway is located, so as to complete the tunneling of the fourth roadway.
Further, the irregular mining area is planned roadway layout by the following calculation:
firstly, making a perpendicular line from an end point A of the shortest heading roadway to a point C of the other heading roadway, determining the length AC of the shortest working face and obtaining an irregular quadrilateral ABDC with two right angles, then randomly taking a point E from the longest side AB, and mining coal resources to the maximum extent by calculating the position of the point E on the longest side.
Further, in determining the E point: setting AC (x), AB (y), AE (z) and marking an included angle between AC and AB as a; point E is determined when the length between AEs takes the value (2X + Ycosa) × sina.
Further, the coal mining area calculation process is as follows: s-face ═ x × z × cos (a-90 °) + (y-z) × sin (180 ° -a) [ (z × sin (a-90 °) + x ] (-1/2 × sina) × z2+ (2 × sina +1/2 × sin2a) × z-xysina (1).
Further, for the symmetry axis, when z ═ b/2a ═ - (2x sina +1/2 y sin2a)/[2x (-1/2) ], z ═ 2x sina +1/2 y sin2a was substituted into the above formula (1) to obtain the maximum S-face value.
Further, the maximum coal mining area was determined when S-face (-1/2 × sin2a) (2 × sina +1/2 × sin2a)2+ (2 × sina +1/2 × sin2a)2-xy sina ═(1-1/2 × sin2a) (2 × sina +1/2 × sin2a)2-xy sina.
Further, when a roadway is arranged, a preset mining area shape matrix A0 and a preset roadway trend matrix theta 0 are pre-established; for the preset sector shape matrix a0, a0(a1, a2, A3, a4), where a1 is a first preset sector shape, a2 is a second preset sector shape, A3 is a third preset sector shape, and a4 is a fourth preset sector shape; for the preset roadway trend matrix theta 0, theta 0 (theta 1, theta 2, theta 3, theta 4), wherein theta 1 is the trend of a first preset roadway, theta 2 is the trend of a second preset roadway, theta 3 is the trend of a third preset roadway, and theta 4 is the trend of a fourth preset roadway;
when the trends of the first roadway and the second roadway are determined, detecting the mining area shape A of the medium-thickness coal seam in advance, and comparing the A with all parameters in the A0 matrix:
when the mining area shape A is a first preset mining area shape A1, setting the trend of the first roadway and the second roadway as theta 1;
when the mining area shape A is a second preset mining area shape A2, setting the trend of the first roadway and the second roadway as theta 2;
when the mining area shape A is a third preset mining area shape A3, setting the trend of the first roadway and the second roadway to be theta 3;
when the panel shape a is the fourth preset panel shape a4, the direction of the first and second roadways is set to θ 4.
Further, after the walking directions of the first roadway and the second roadway are determined, establishing a preset shortest length matrix D0 of the working surface and a preset shortest position matrix L0 of the working surface; for the preset shortest length matrix D0, D0(D1, D2, D3, D4), wherein D1 is the shortest length of the first preset working surface, D2 is the shortest length of the second preset working surface, D3 is the shortest length of the third preset working surface, D4 is the shortest length of the fourth preset working surface, and the preset shortest lengths are gradually increased in sequence; for the preset shortest working face position matrix L0, L0(L1, L2, L3, L4), where L1 is a first preset shortest working face position, L2 is a second preset shortest working face position, L3 is a third preset shortest working face position, and L4 is a fourth preset shortest working face position;
after the first roadway and the second roadway are determined to run backwards, the shortest length D of the working surface is determined according to the first roadway and the second roadway, and D is compared with various parameters in a D0 matrix:
when D is less than or equal to D1, the position of the shortest working face is set to L1;
when D is more than D1 and less than or equal to D2, the position of the shortest working face is set at L2;
when D is more than D2 and less than or equal to D3, the position of the shortest working face is set at L3;
when D3 < D ≦ D4, the position of the shortest working surface is set at L4.
Compared with the prior art, the invention has the technical effects that the design of the mining area can simplify a roadway system, effectively reduce the coal loss, improve the coal extraction rate, fully utilize the coal resources, ensure and prolong the mining period of the coal face and the mining area, reduce the tunneling rate, have good safety condition and improve various economic indexes.
Further, when the shortest length of the working face and the position of the shortest working face are determined according to the first roadway and the second roadway, firstly, a designated point is determined on the first roadway to form a perpendicular line to the second roadway, then, the shortest length of the working face and the position of the shortest working face are determined according to the length of the perpendicular line, and by forming the perpendicular line from the first roadway to the second roadway, the shortest length of the working face and the position of the shortest working face can be determined quickly and accurately according to the length of the perpendicular line, so that the mining efficiency of the method is further improved.
Further, the irregular mining area is planned roadway layout by the following calculation: firstly, a perpendicular line is drawn from an end point A of the shortest heading roadway to a point C of the other heading roadway, the length AC of the shortest working face is determined, two right-angled trapezoids ABDC are obtained, then a point E is arbitrarily selected from the longest edge AB, and the position of the point E on the longest edge is calculated, so that coal resources can be exploited to the greatest extent, and the exploitation efficiency of the method is further improved.
Further, setting AC as x, AB as y, AE as z, and marking the included angle between AC and AB as a; when the length between the AEs is (2X + Ycosa) sina, the E point is determined, and the E point can be rapidly and accurately determined by using the method, so that the mining efficiency of the coal resource is improved to the maximum extent in the subsequent mining process, and the mining efficiency of the method is further improved.
Further, the coal mining area is calculated through a formula of S-face (-1/2 sina) z2+ (2x sina +1/2 sin2a) z-xsysina, the coal mining area can be rapidly calculated, and therefore the mining efficiency of the method is improved.
Further, when z ═ b/2a ═ - (2x × sina +1/2 × y sin2a)/[2x (-1/2) ], z ═ 2x × sina +1/2 y sin2a is substituted into the above formula to obtain the maximum S-face value, and the maximum value of the S-face can be quickly calculated by using the above formula, thereby effectively increasing the coal mining area and further increasing the mining efficiency using the method.
Further, when the roadways are arranged, a preset mining area shape matrix A0(A1, A2, A3, A4) and a preset roadway trend matrix theta 0 (theta 1, theta 2, theta 3, theta 4) are established in advance, and the mining area shape A of the medium-thickness coal seam is detected in advance, and the A and the parameters in the A0 matrix are compared to select the trend of the corresponding first roadway and the second roadway from the theta 0 matrix, so that the mining amount of the coal mine can be effectively improved in the subsequent process, and the mining efficiency of the method is further improved.
Further, after the walking directions of the first roadway and the second roadway are determined, a preset shortest length matrix D0(D1, D2, D3, D4) and a preset shortest working face position matrix L0(L1, L2, L3, L4) are established, and the shortest length D of the working face determined according to the first roadway and the second roadway is compared with various parameters in the D0 matrix to select a corresponding shortest working face position from the L0 matrix, so that the mining amount of a coal mine can be further improved in the subsequent process, and the mining efficiency of the method is further improved.
Drawings
Fig. 1 is a schematic view of a first arrangement structure of a coal mining roadway provided by the invention;
fig. 2 is a schematic view of a second arrangement structure of a coal mining roadway provided by the invention;
fig. 3 is a schematic view of a third arrangement structure of a coal mining roadway provided by the invention;
fig. 4 is a schematic view of a fourth arrangement structure of a coal mining roadway provided by the invention;
fig. 5 is a schematic diagram of a roadway arrangement structure of an irregular mining area provided by the invention.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example one
Referring to fig. 1 and fig. 2, which are schematic diagrams of a first arrangement structure and a second arrangement structure of a coal mining roadway provided by the present invention, an auxiliary haulage roadway 1, a main haulage roadway 2, and a continuous mining working face 3 are provided in the present embodiment.
When the roadway is tunneled to the point A on the extension end of the main transport roadway 2, the roadway is retreated to the point D to be tunneled and connected with the roadway DC so that the width of the working face is increased or reduced, and then the roadway is continuously tunneled along the direction of CG;
in the production process, when the coal face is pushed to the point B, three points A, B, E are communicated, and the transshipment equipment cannot be shortened, so that the BC section coal conveying equipment needs to be withdrawn, and the transshipment equipment which cannot be shortened in the BC section is moved to the AD section to be overlapped with the lower coal conveying equipment (main transportation crossheading coal conveying equipment) for continuous transportation. Meanwhile, after the coal face is pushed to the point B to enable the point A, B, E to be communicated, a hydraulic support and a scraper chute are added (shown in the figure 2) or removed (shown in the figure 1) in the section AB. The length of the coal face FG is increased or reduced to become a coal face EA, and the coal face EA can be normally pushed to continue to recover.
Example two
Referring to fig. 3 and 4, which are schematic diagrams of a third arrangement structure and a fourth arrangement structure of a coal mining roadway provided by the present invention, an auxiliary haulage roadway 1, a main haulage roadway 2, and a continuous mining working face 3 are provided in the present embodiment.
When the roadway is tunneled to the point A on the extension end of the auxiliary transport roadway 1, the roadway is retreated to the point D to be tunneled and connected with the roadway DC so that the width of the working face is increased or reduced, and then the roadway is continuously tunneled along the direction of CG;
in the production process, when the coal face is pushed to the point C, after the A, C, E points are communicated, the transportation and transshipment equipment of the main transportation roadway 2 is not affected, so that only a hydraulic support and a scraper chute need to be added (figure 4) or removed (figure 3) in the AC section. The working face FG is increased (fig. 4) or decreased (fig. 3) in length to become the working face EA to continue the extraction with normal advance.
Specifically, the method based on the roadway arrangement of the irregular mining area comprises the following steps:
step 1: acquiring the mining area shape of the medium-thickness coal seam;
step 2: setting the initial position, the end point position and the trend of a first roadway and the initial position, the end point position and the trend of a second roadway according to the mining area shape of the medium-thickness coal seam, wherein the trend of the first roadway and the trend of the second roadway are arranged in parallel;
and step 3: determining the position of a tunneling intermediate point according to the number of preset tunneling intermediate points so as to maximize the sum of areas of a plurality of rectangular mining areas in a mining area range, wherein the rectangular mining areas are defined by a working face where the tunneling intermediate point is located, a working face where the initial position of a first roadway is located, a working face where the end position of the first roadway is located, the trend of the first roadway and the trend of a second roadway, the number of the tunneling intermediate points is one or more, and the working face where the tunneling intermediate point is located, the working face where the initial position of the first roadway is located and the working face where the end position of the second roadway is located are all perpendicular to the trend of the first roadway;
and 4, step 4: and according to the plurality of rectangular mining areas, setting the edges of the plurality of rectangular mining areas along the trend of the first roadway into a third roadway and a fourth roadway, and setting a connecting roadway according to the position of a middle point of roadway excavation, wherein the connecting roadway is used for connecting the third roadway and the fourth roadway.
Specifically, the excavation of the roadway includes:
tunneling from the initial position of the first tunnel along the trend of the first tunnel until the working face of the middle tunneling point of the tunnel is located so as to complete the tunneling of a third tunnel;
the preset length is backed off, and the heading is carried out on the intersection point of the working face where the fourth roadway and the heading middle point are located from the position after the back-off so as to complete the heading of the connected roadway;
and tunneling from the intersection point of the working surface where the intermediate point of the fourth roadway and the roadway is located along the trend of the first roadway until the working surface where the end point of the first roadway is located, so as to complete the tunneling of the fourth roadway. Specifically, the irregular mining area is planned roadway layout by the following calculation:
firstly, making a perpendicular line from an end point A of the shortest heading roadway to a point C of the other heading roadway, determining the length AC of the shortest working face and obtaining an irregular quadrilateral ABDC with two right angles, then randomly taking a point E from the longest side AB, and mining coal resources to the maximum extent by calculating the position of the point E on the longest side.
Specifically, in determining the E point: setting AC (x), AB (y), AE (z) and marking an included angle between AC and AB as a; point E is determined when the length between AEs takes the value (2X + Ycosa) × sina.
Specifically, the coal mining area calculation process is as follows: s-face ═ x × z × cos (a-90 °) + (y-z) × sin (180 ° -a) [ (z × sin (a-90 °) + x ] (-1/2 × sina) × z2+ (2 × sina +1/2 × sin2a) × z-xysina (1).
Specifically, for the symmetry axis, when z ═ b/2a ═ 2x sina +1/2 x y sin2 a/[ 2x (-1/2) ], z ═ 2x sina +1/2 y sin2a was substituted into the above formula (1) to obtain the maximum S-plane value.
Specifically, the coal mining area was determined to be the largest when the S-face (-1/2 × sin2a) (2 × sina +1/2 × y sin2a)2+ (2 × sina +1/2 × sin2a)2-xy sina ═(1-1/2 × sin2a) (2 × sina +1/2 × sin2a)2-xy sina.
Specifically, when a roadway is arranged, a preset mining area shape matrix A0 and a preset roadway trend matrix theta 0 are established in advance; for the preset sector shape matrix a0, a0(a1, a2, A3, a4), where a1 is a first preset sector shape, a2 is a second preset sector shape, A3 is a third preset sector shape, and a4 is a fourth preset sector shape; for the preset roadway trend matrix theta 0, theta 0 (theta 1, theta 2, theta 3, theta 4), wherein theta 1 is the trend of a first preset roadway, theta 2 is the trend of a second preset roadway, theta 3 is the trend of a third preset roadway, and theta 4 is the trend of a fourth preset roadway;
when the trends of the first roadway and the second roadway are determined, detecting the mining area shape A of the medium-thickness coal seam in advance, and comparing the A with all parameters in the A0 matrix:
when the mining area shape A is a first preset mining area shape A1, setting the trend of the first roadway and the second roadway as theta 1;
when the mining area shape A is a second preset mining area shape A2, setting the trend of the first roadway and the second roadway as theta 2;
when the mining area shape A is a third preset mining area shape A3, setting the trend of the first roadway and the second roadway to be theta 3;
when the panel shape a is the fourth preset panel shape a4, the direction of the first and second roadways is set to θ 4.
Specifically, after the walking directions of the first roadway and the second roadway are determined, a preset working face shortest length matrix D0 and a preset shortest working face position matrix L0 are established; for the preset shortest length matrix D0, D0(D1, D2, D3, D4), wherein D1 is the shortest length of the first preset working surface, D2 is the shortest length of the second preset working surface, D3 is the shortest length of the third preset working surface, D4 is the shortest length of the fourth preset working surface, and the preset shortest lengths are gradually increased in sequence; for the preset shortest working face position matrix L0, L0(L1, L2, L3, L4), where L1 is a first preset shortest working face position, L2 is a second preset shortest working face position, L3 is a third preset shortest working face position, and L4 is a fourth preset shortest working face position;
after the first roadway and the second roadway are determined to run backwards, the shortest length D of the working surface is determined according to the first roadway and the second roadway, and D is compared with various parameters in a D0 matrix:
when D is less than or equal to D1, the position of the shortest working face is set to L1;
when D is more than D1 and less than or equal to D2, the position of the shortest working face is set at L2;
when D is more than D2 and less than or equal to D3, the position of the shortest working face is set at L3;
when D3 < D ≦ D4, the position of the shortest working surface is set at L4.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention; various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A roadway arrangement method based on irregular mining areas is characterized by comprising the following steps:
step 1: acquiring the mining area shape of the medium-thickness coal seam;
step 2: setting the initial position, the end point position and the trend of a first roadway and the initial position, the end point position and the trend of a second roadway according to the mining area shape of the medium-thickness coal seam, wherein the trend of the first roadway and the trend of the second roadway are arranged in parallel;
and step 3: determining the position of a tunneling intermediate point according to the number of preset tunneling intermediate points so as to maximize the sum of areas of a plurality of rectangular mining areas in a mining area range, wherein the rectangular mining areas are defined by a working face where the tunneling intermediate point is located, a working face where the initial position of a first roadway is located, a working face where the end position of the first roadway is located, the trend of the first roadway and the trend of a second roadway, the number of the tunneling intermediate points is one or more, and the working face where the tunneling intermediate point is located, the working face where the initial position of the first roadway is located and the working face where the end position of the second roadway is located are all perpendicular to the trend of the first roadway;
and 4, step 4: setting the edges of the plurality of rectangular mining areas along the trend of the first roadway into a third roadway and a fourth roadway according to the plurality of rectangular mining areas, and setting a connecting roadway according to the position of a middle point of roadway excavation, wherein the connecting roadway is used for connecting the third roadway and the fourth roadway;
when the roadway is excavated, the method comprises the following steps:
tunneling from the initial position of the first tunnel along the trend of the first tunnel until the working face of the middle tunneling point of the tunnel is located so as to complete the tunneling of a third tunnel;
the preset length is backed off, and the heading is carried out on the intersection point of the working face where the fourth roadway and the heading middle point are located from the position after the back-off so as to complete the heading of the connected roadway;
tunneling from the intersection point of the working face where the fourth roadway and the middle point of roadway tunneling are located along the trend of the first roadway to the working face where the terminal position of the first roadway is located to complete the tunneling of the fourth roadway;
when a roadway is arranged, a preset mining area shape matrix A0 and a preset roadway trend matrix theta 0 are established in advance; for the preset sector shape matrix a0, a0(a1, a2, A3, a4), where a1 is a first preset sector shape, a2 is a second preset sector shape, A3 is a third preset sector shape, and a4 is a fourth preset sector shape; for the preset roadway trend matrix theta 0, theta 0 (theta 1, theta 2, theta 3, theta 4), wherein theta 1 is the trend of a first preset roadway, theta 2 is the trend of a second preset roadway, theta 3 is the trend of a third preset roadway, and theta 4 is the trend of a fourth preset roadway;
when the trends of the first roadway and the second roadway are determined, detecting the mining area shape A of the medium-thickness coal seam in advance, and comparing the A with all parameters in the A0 matrix:
when the mining area shape A is a first preset mining area shape A1, setting the trend of the first roadway and the second roadway as theta 1;
when the mining area shape A is a second preset mining area shape A2, setting the trend of the first roadway and the second roadway as theta 2;
when the mining area shape A is a third preset mining area shape A3, setting the trend of the first roadway and the second roadway to be theta 3;
when the mining area shape A is a fourth preset mining area shape A4, setting the trend of the first roadway and the second roadway to be theta 4;
after the walking directions of the first roadway and the second roadway are determined, establishing a preset shortest working face length matrix D0 and a preset shortest working face position matrix L0; for the preset shortest length matrix D0, D0(D1, D2, D3, D4), wherein D1 is the shortest length of the first preset working surface, D2 is the shortest length of the second preset working surface, D3 is the shortest length of the third preset working surface, D4 is the shortest length of the fourth preset working surface, and the preset shortest lengths are gradually increased in sequence; for the preset shortest working face position matrix L0, L0(L1, L2, L3, L4), where L1 is a first preset shortest working face position, L2 is a second preset shortest working face position, L3 is a third preset shortest working face position, and L4 is a fourth preset shortest working face position;
after the first roadway and the second roadway are determined to run backwards, the shortest length D of the working surface is determined according to the first roadway and the second roadway, and D is compared with various parameters in a D0 matrix:
when D is less than or equal to D1, the position of the shortest working face is set to L1;
when D is more than D1 and less than or equal to D2, the position of the shortest working face is set at L2;
when D is more than D2 and less than or equal to D3, the position of the shortest working face is set at L3;
when D3 < D ≦ D4, the position of the shortest working surface is set at L4.
2. The method of irregular panel-based roadway layout of claim 1, wherein the irregular panels are planned roadway layout by the following calculations:
firstly, making a perpendicular line from an end point A of the shortest heading roadway to a point C of the other heading roadway, determining the length AC of the shortest working face and obtaining an irregular quadrilateral ABDC with two right angles, then arbitrarily taking a point E from the longest side AB, and mining the coal resources to the maximum extent by calculating the position of the point E at the longest side.
3. The method of irregular panel-based roadway layout of claim 2, wherein in determining the E point: setting AC (x), AB (y), AE (z) and marking an included angle between AC and AB as a; point E is determined when the length between AEs takes the value (2X + Ycosa) × sina.
4. The method for roadway layout based on irregular mining areas according to claim 3, wherein the calculation process of the coal mining area is as follows: s-face ═ x × z × cos (a-90 °) + (y-z) × sin (180 ° -a) [ (z × sin (a-90 °) + x ] (-1/2 × sina) × z2+ (2 × sina +1/2 × sin2a) × z-xysina (1).
5. The method of irregular mining-based roadway layout according to claim 4, characterized in that for the symmetry axis, when z ═ b/2a ═ - (2x sina +1/2 x y sin2a)/[2x (-1/2) ], z ═ 2x sina +1/2 x y sin2a is substituted into the above formula (1) to find the maximum S face value.
6. The method of irregular mining sector based roadway placement according to claim 5, characterized in that the coal mining area is determined to be maximum when S-face (-1/2 × sin2a) (2x × sina +1/2 × y sin2a)2+ (2x sina +1/2 × sin2a)2-xy sina- (1-1/2 × sin2a) (2x sina +1/2 × sin2a)2-xy sina.
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