CN114033482A - Ventilation method based on large-step-distance filling of coal face - Google Patents
Ventilation method based on large-step-distance filling of coal face Download PDFInfo
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- CN114033482A CN114033482A CN202111361044.3A CN202111361044A CN114033482A CN 114033482 A CN114033482 A CN 114033482A CN 202111361044 A CN202111361044 A CN 202111361044A CN 114033482 A CN114033482 A CN 114033482A
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- 238000011049 filling Methods 0.000 title claims abstract description 112
- 239000003245 coal Substances 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000009423 ventilation Methods 0.000 title claims abstract description 36
- 238000005065 mining Methods 0.000 claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 claims abstract description 20
- 238000007711 solidification Methods 0.000 claims abstract description 10
- 230000000737 periodic effect Effects 0.000 claims abstract description 6
- 238000012423 maintenance Methods 0.000 claims abstract description 5
- 230000008023 solidification Effects 0.000 claims abstract description 5
- 238000013461 design Methods 0.000 claims description 20
- 239000000178 monomer Substances 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims 2
- 230000005641 tunneling Effects 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 2
- 239000000945 filler Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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- Road Paving Structures (AREA)
Abstract
The invention discloses a ventilation method based on large-step-distance filling of a coal face, which comprises the following two technical methods: according to the production characteristics of the counter-pulling working face, managing the goaf roof by adopting a paste filling method: the first working face organizes production according to the operation mode of coal mining, filling, solidification and maintenance; the second working face organizes production according to the operation mode of 'filling-solidification/maintenance-coal mining'; and (3) referring to the mine pressure observation data of the coal working face of the adjacent mining area, selecting mine pressure parameters of the coal working face of the mining area, determining the initial pressure step pitch, the periodic pressure step pitch and the maximum roof pressure, and managing the roof of the goaf by adopting a paste filling method. The ventilation method for the coal face filling construction effectively solves the ventilation technical problem of the filling template support work, eliminates potential safety accidents, and saves the tunneling cost and the tunneling time as the upper track crossheading is reserved for the next working face by filling the pull working face.
Description
Technical Field
The invention relates to the technical field of mine safety facilities, in particular to a ventilation method based on large-step-distance filling of a coal face.
Background
The environmental damage caused by the ground collapse caused by coal mining is seriously contradicted with the national policy of green development. In order to develop the coal industry of our country in a green development framework, the miners and coal mines strongly advocate a coal mining process for filling and managing the roof.
The filling mining method is a rock stratum control method for filling a goaf with filling materials. The filling body is used for ground pressure management, ground surface subsidence and surrounding rock caving are restrained, ecological environment balance of a mining site is protected, and damage to ground structures, casualties and obstruction to normal traffic are avoided.
The mining process of the filling method is mature, in order to implement filling, a template needs to be built in a goaf filling area, and therefore the problem of poor ventilation of a working place of a template building worker occurs. Therefore, the ventilation method based on the large-step filling of the coal face is improved.
Disclosure of Invention
In order to solve the technical problems, the invention provides the following technical scheme:
the invention relates to a ventilation method based on large-step-distance filling of a coal face, which comprises the following two technical methods:
A. according to the production characteristics of the counter-pulling working face, managing the goaf roof by adopting a paste filling method: the first working face organizes production according to the operation mode of coal mining, filling, solidification and maintenance; the second working face organizes production according to the operation mode of 'filling-solidification/maintenance-coal mining';
B. and (3) referring to the mine pressure observation data of the coal working face of the adjacent mining area, selecting mine pressure parameters of the coal working face of the mining area, determining the initial pressure step pitch, the periodic pressure step pitch and the maximum roof pressure, and managing the roof of the goaf by adopting a paste filling method.
In a preferred embodiment of the present invention, in step a, the upper working face is arranged according to fig. 1(1) according to the layout of the counter-pulling working faces, and the upper working face leads the lower working face during normal push mining.
As a preferred technical scheme of the invention, in the step A, the upper working face is stoped to the designed width for filling, a ventilation channel with the length of 1-2 meters is reserved in the working face goaf, the rest parts are all filled, and after the strength of the first filling body of the upper working face reaches a certain pressure, the upper working face continues to produce and is pushed to mine according to the designed size.
In the step A, after the same size is adopted for the upper working face, filling is carried out according to the step three, meanwhile, the single support in the upper rail roadway on one side of the first filling body is withdrawn and the roadway is sealed, so that the air current is guaranteed to smoothly pass through the working face and the filling ventilation facility, after the filling of the upper working face is finished, the same design is adopted for the lower working face, and after the design size of the lower working face is adopted, filling is carried out according to the same design in the step three.
In the step a, after the strength of the filler on the lower working face reaches the design pressure, the upper working face continues to produce, the design size is obtained, meanwhile, the monomer in the upper rail roadway on one side of the second filler on the upper working face is withdrawn and the roadway is sealed, so that the air flow is ensured to smoothly pass along the working face and the filling ventilation facility, and the circulation mining is carried out according to the sixteenth principle.
As a preferred technical solution of the present invention, in the step B, the opposite-pulling working faces are arranged according to fig. 2(1), the cutting hole is 3.95m, and the upper working face is ahead of the lower working face during normal mining, so that the upper working face is mined back by 6.0m first.
As a preferred technical scheme of the invention, in the step B, 6.0m of the stope of the upper working face is filled, 5m is filled to the coal wall from the goaf direction, and after the strength of the first filling body of the upper working face reaches 0.3MPa, the upper working face continues to produce, and the stope is 6.0 m.
As a preferred technical solution of the present invention, in the step B, 6.0m of the upper working face is filled, the upper working face is filled with the filling material at a distance of 2m from the previous filling material, the single body in the upper rail roadway on one side of the first filling material is withdrawn and the roadway is sealed, and after the upper working face is filled, the lower working face is stoped for 6.0 m.
As a preferred technical scheme of the invention, in the step B, 6.0m of the lower working face is filled, 5m is filled to the coal wall from the goaf direction, after the strength of the lower working face filler reaches 0.3MPa, the upper working face continues to produce, 6.0m is pushed and mined, and simultaneously the monomer in the upper rail roadway on the side of the second filler of the upper working face is withdrawn and the roadway is sealed, and the circulation mining is performed according to the sixteenth principle.
The invention has the beneficial effects that: the ventilation method for the coal face filling construction effectively solves the ventilation technical problem of the filling template support work, eliminates potential safety accidents, and saves the tunneling cost and the tunneling time as the upper track crossheading is reserved for the next working face by filling the pull working face.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of method A of a coal face large step fill based ventilation method of the present invention;
FIG. 2 is a flow chart of a method B of the ventilation method based on large step-distance filling of the coal face of the invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
The first embodiment is as follows:
the method comprises the following two technical methods:
A. according to the production characteristics of the counter-pulling working face, managing the goaf roof by adopting a paste filling method: the first working face organizes production according to the operation mode of coal mining, filling, solidification and maintenance; the second working face organizes production according to the operation mode of 'filling-solidification/maintenance-coal mining';
B. and (3) referring to the mine pressure observation data of the coal working face of the adjacent mining area, selecting mine pressure parameters of the coal working face of the mining area, determining the initial pressure step pitch, the periodic pressure step pitch and the maximum roof pressure, and managing the roof of the goaf by adopting a paste filling method.
As a preferred technical solution of the present invention, in the step a, according to the arrangement of the counter-pulling working faces according to fig. 1(1), the upper working face is ahead of the lower working face during normal push mining, as shown in fig. 1 (2).
As a preferred technical scheme of the invention, in the step a, the upper working face is stoped to the designed width for filling, 1-2 m ventilation channels are left in the working face goaf, and the rest are filled completely, as shown in fig. 1 (3); after the strength of the first filling body of the upper working face reaches a certain pressure, the upper working face continues to produce according to the designed size, and the production is pushed and produced as shown in the figure 1 (4).
As a preferred technical scheme of the present invention, in the step a, after the upper working face is pushed to the same size, filling is performed according to the step three, and at the same time, the single prop in the rail roadway on one side of the first filling body is retracted and seals the roadway, so as to ensure that the air current smoothly passes along the working face and the filling ventilation facility, as shown in fig. 1(5), and after the filling of the upper working face is finished, pushing and mining are performed on the lower working face in the same design, as shown in fig. 1 (6); after the design size of the lower working surface is adopted, filling is carried out according to the same design in step (c), as shown in the figure 1 (7).
As a preferred technical solution of the present invention, in the step a, after the strength of the filling body of the lower working face reaches the design pressure, the upper working face continues to produce, the design size is obtained, and at the same time, the single body in the rail roadway on one side of the second filling body of the upper working face is withdrawn and the roadway is sealed, so as to ensure that the air current smoothly passes through the working face and the filling ventilation facility, as shown in fig. 1 (8); and performing circular mining according to the fifth step of the sixth step of the seventh step of the sixth step of the seventh step of the sixth step of the fourth step of the sixth step of the seventh step of the sixth step of the seventh step of the sixth step of the seventh step of the third step of the seventh step of the third step of the sixth step of the seventh step of the sixth step of the seventh step.
As a preferred technical solution of the present invention, in the step B, the opposite-pulling working faces are arranged according to fig. 2(1), the cutting hole is 3.95m, and the upper working face is ahead of the lower working face during normal push mining, so that the upper working face is mined back by 6.0m, as shown in fig. 2 (2).
As a preferred technical solution of the present invention, in the step B, 6.0m of the stope of the upper working face is filled, and 5m is filled from the goaf direction to the coal wall, as shown in fig. 1(3), after the strength of the first filling body of the upper working face reaches 0.3MPa, the production of the upper working face is continued, and the stope is 6.0m, as shown in fig. 2 (4).
As a preferred technical solution of the present invention, in the step B, 6.0m of the stope of the upper working face is filled, the stope is filled at a distance of 2m from the previous filling body, and simultaneously, the single body in the rail roadway on the side of the first filling body is withdrawn and the roadway is sealed, as shown in fig. 2(5), and after the filling of the upper working face is finished, the stope of the lower working face is withdrawn by 6.0m, as shown in fig. 2 (6).
As a preferred technical scheme of the present invention, in the step B, 6.0m of the lower working face is filled, 5m is filled to the coal wall from the goaf direction, as shown in fig. 2(7), after the strength of the lower working face filler reaches 0.3MPa, the upper working face continues to produce, 6.0m is pushed, and simultaneously the monomer in the upper rail roadway on the side of the second filler on the upper working face is withdrawn and the roadway is sealed, as shown in fig. 2(8), the circulation mining is performed according to a (c) () and (c) ().
Example two:
the method comprises the following two technical methods:
A. according to the production characteristics of the counter-pulling working face, managing the goaf roof by adopting a paste filling method: the first working face organizes production according to the operation mode of coal mining, filling, solidification and maintenance; the second working face organizes production according to the operation mode of 'filling-solidification/maintenance-coal mining';
B. and (3) referring to the mine pressure observation data of the coal working face of the adjacent mining area, selecting mine pressure parameters of the coal working face of the mining area, determining the initial pressure step pitch, the periodic pressure step pitch and the maximum roof pressure, and managing the roof of the goaf by adopting a paste filling method.
As a preferred technical solution of the present invention, in the step a, according to the arrangement of the counter-pulling working faces according to fig. 1(1), the upper working face is ahead of the lower working face during normal push mining, as shown in fig. 1 (2).
As a preferred technical scheme of the invention, in the step a, the upper working face is stoped to the designed width for filling, 1-2 m ventilation channels are left in the working face goaf, and the rest are filled completely, as shown in fig. 1 (3); after the strength of the first filling body of the upper working face reaches a certain pressure, the upper working face continues to produce according to the designed size, and the production is pushed and produced as shown in the figure 1 (4).
As a preferred technical scheme of the present invention, in the step a, after the upper working face is pushed to the same size, filling is performed according to the step three, and at the same time, the single prop in the rail roadway on one side of the first filling body is retracted and seals the roadway, so as to ensure that the air current smoothly passes along the working face and the filling ventilation facility, as shown in fig. 1(5), and after the filling of the upper working face is finished, pushing and mining are performed on the lower working face in the same design, as shown in fig. 1 (6); after the design size of the lower working surface is adopted, filling is carried out according to the same design in step (c), as shown in the figure 1 (7).
As a preferred technical solution of the present invention, in the step a, after the strength of the filling body of the lower working face reaches the design pressure, the upper working face continues to produce, the design size is obtained, and at the same time, the single body in the rail roadway on one side of the second filling body of the upper working face is withdrawn and the roadway is sealed, so as to ensure that the air current smoothly passes through the working face and the filling ventilation facility, as shown in fig. 1 (8); and performing circular mining according to the fifth step of the sixth step of the seventh step of the sixth step of the seventh step of the sixth step of the fourth step of the sixth step of the seventh step of the sixth step of the seventh step of the sixth step of the seventh step of the third step of the seventh step of the third step of the sixth step of the seventh step of the sixth step of the seventh step.
As a preferred technical solution of the present invention, in the step B, the opposite-pulling working faces are arranged according to fig. 2(1), the cutting hole is 3.95m, and the upper working face is ahead of the lower working face during normal push mining, so that the upper working face is mined back by 6.0m, as shown in fig. 2 (2).
As a preferred technical solution of the present invention, in the step B, 6.0m of the stope of the upper working face is filled, and 5m is filled from the goaf direction to the coal wall, as shown in fig. 1(3), after the strength of the first filling body of the upper working face reaches 0.3MPa, the production of the upper working face is continued, and the stope is 6.0m, as shown in fig. 2 (4).
As a preferred technical solution of the present invention, in the step B, 6.0m of the stope of the upper working face is filled, the stope is filled at a distance of 2m from the previous filling body, and simultaneously, the single body in the rail roadway on the side of the first filling body is withdrawn and the roadway is sealed, as shown in fig. 2(5), and after the filling of the upper working face is finished, the stope of the lower working face is withdrawn by 6.0m, as shown in fig. 2 (6).
As a preferred technical scheme of the present invention, in the step B, 6.0m of the lower working face is filled, 5m is filled to the coal wall from the goaf direction, as shown in fig. 2(7), after the strength of the lower working face filler reaches 0.3MPa, the upper working face continues to produce, 6.0m is pushed, and simultaneously the monomer in the upper rail roadway on the side of the second filler on the upper working face is withdrawn and the roadway is sealed, as shown in fig. 2(8), the circulation mining is performed according to a (c) () and (c) ().
The mine adopts a full-filling full-mining mode, the filling rate is 100 percent, the working face adopts the management of 'three six chambers', the maximum controlled jacking distance is 9.95m, the minimum controlled jacking distance is 3.95m, the row distance is 1.2m, and the column distance is 0.85 m. The mine pressure parameters for adjacent panels are shown in the table below.
Same coal seam mine pressure observation data table
Determining the filling step pitch and the reserved width of the ventilation facility roadway of the filling working face according to the periodic pressure step pitch; determining the supporting pressure and the supporting density of the filling reinforcing column according to the maximum top plate pressure;
the upper rail crossheading is reserved for the use of the next working face by filling the pull working face, so that the tunneling cost is saved, and the tunneling time is also saved. Normally, the upper surface of the normal pushing mining is ahead of the lower surface of the normal pushing mining, and the offset distance between the two surfaces is 3-10 m; when the coal is initially mined and passes through a fault, the dislocation distance between two surfaces is 3-20 m. Because the filling step pitch is large and the maximum top control pitch is large, a section is recommended to be selected for testing, meanwhile, the pressure of the top plate is observed, production is organized according to the designed filling step pitch after the test is successful, and when the fault or the top plate condition is poor, the filling step pitch is shortened.
Finally, it should be noted that: in the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred 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.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be 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.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. 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 (9)
1. A ventilation method based on large-step-distance filling of a coal face comprises the following two technical methods:
A. according to the production characteristics of the counter-pulling working face, managing the goaf roof by adopting a paste filling method: the first working face organizes production according to the operation mode of coal mining, filling, solidification and maintenance; the second working face organizes production according to the operation mode of 'filling-solidification/maintenance-coal mining';
B. and (3) referring to the mine pressure observation data of the coal working face of the adjacent mining area, selecting mine pressure parameters of the coal working face of the mining area, determining the initial pressure step pitch, the periodic pressure step pitch and the maximum roof pressure, and managing the roof of the goaf by adopting a paste filling method.
2. The ventilation method based on the large-step-distance filling of the coal face is characterized in that:
in the step A, the upper working face is arranged ahead of the lower working face during normal push mining according to the drawing (1) of the drawing working face.
3. The ventilation method based on the large-step-distance filling of the coal face is characterized in that:
and in the step A, the stoping of the upper working face is carried out to the designed width for filling, 1-2 m ventilation channels are reserved in the goaf of the working face, the rest ventilation channels are filled completely, after the strength of the first filling body of the upper working face reaches a certain pressure, the upper working face continues to produce, and the stoping is carried out according to the designed size.
4. The ventilation method based on the large-step-distance filling of the coal face is characterized in that:
and in the step A, after the upper working face is pushed to adopt the same size, filling according to the step III, simultaneously withdrawing the single prop in the upper rail roadway on one side of the first filling body and sealing the roadway to ensure that the air current smoothly passes along the working face and the filling ventilation facility, after the filling of the upper working face is finished, pushing and adopting the same design on the lower working face, and after the pushing and adopting design size of the lower working face, filling according to the same design in the step III.
5. The ventilation method based on the large-step-distance filling of the coal face is characterized in that:
and in the step A, after the strength of the filling body of the lower working face reaches the design pressure, the upper working face continues to produce, the design size is obtained, meanwhile, the monomer in the upper rail roadway on one side of the second filling body of the upper working face is withdrawn and the roadway is sealed, the smooth passing of the air flow along the working face and the filling ventilation facility is ensured, and the circular mining is carried out according to the sixteenth step seventeenth step.
6. The ventilation method based on the large-step-distance filling of the coal face is characterized in that:
in the step B, the opposite-pulling working faces are arranged according to the graph (2) (1), the cutting hole is 3.95m, and the upper working face is ahead of the lower working face during normal pushing and mining, so that the upper working face is mined for 6.0m firstly.
7. The ventilation method based on the large-step-distance filling of the coal face is characterized in that:
and in the step B, 6.0m of stoping of the upper working face is filled, 5m of stoping is filled from the direction of the goaf to the coal wall, and after the strength of the first filling body of the upper working face reaches 0.3MPa, the upper working face continues to produce, and the stoping is carried out for 6.0 m.
8. The ventilation method based on the large-step-distance filling of the coal face is characterized in that:
and in the step B, 6.0m of the stoped upper working face is filled, the stoped upper working face is filled at a distance of 2m from the last filling body, meanwhile, the single body in the upper rail roadway on one side of the first filling body is withdrawn and the roadway is sealed, and after the filling of the upper working face is finished, the stoped lower working face is stoped for 6.0 m.
9. The ventilation method based on the large-step-distance filling of the coal face is characterized in that:
and in the step B, filling 6.0m of the lower working face, filling 5m to the coal wall from the goaf direction, continuing to produce the upper working face after the strength of the filling body of the lower working face reaches 0.3MPa, pushing to mine 6.0m, simultaneously withdrawing the monomer in the upper rail roadway on one side of the second filling body of the upper working face and sealing the roadway, and performing circular mining according to a fifth seventh principle.
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