CN113863950B - Roadway arrangement method for reserving small coal pillars between stoping working faces - Google Patents
Roadway arrangement method for reserving small coal pillars between stoping working faces Download PDFInfo
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- CN113863950B CN113863950B CN202111110559.6A CN202111110559A CN113863950B CN 113863950 B CN113863950 B CN 113863950B CN 202111110559 A CN202111110559 A CN 202111110559A CN 113863950 B CN113863950 B CN 113863950B
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- 239000003245 coal Substances 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000009423 ventilation Methods 0.000 claims abstract description 17
- 238000011084 recovery Methods 0.000 claims abstract description 7
- 230000005641 tunneling Effects 0.000 claims description 13
- 238000000926 separation method Methods 0.000 claims description 9
- 238000000605 extraction Methods 0.000 claims description 7
- 239000011435 rock Substances 0.000 abstract description 8
- 238000009412 basement excavation Methods 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000005065 mining Methods 0.000 description 23
- 238000004891 communication Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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- Remote Sensing (AREA)
- Environmental & Geological Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a roadway arrangement method for reserving small coal pillars between stoping working surfaces, which comprises the following steps: dividing the first working surface into a first section and a second section, and dividing the second working surface into a third section and a fourth section; digging a transportation roadway, a cutting hole, a third section of return air roadway and an auxiliary roadway of the second working face to construct a first return air system; the third section is stoped, a fourth section of return air lane is dug, and the third section of stoping is ventilated by using a first return air system; reserving or filling auxiliary roadways; if the auxiliary roadway is filled, the transportation roadway, the cut hole and the fourth section of return air roadway form a second return air system, the second return air system is used for ventilation in the stoping of the fourth section, or if the auxiliary roadway is reserved, the third return air system is formed in the auxiliary roadway, the cut hole and the fourth section of return air roadway, and the second return air system and the third return air system are used for ventilation in the stoping of the fourth section. The roadway arrangement method improves the recovery rate, relieves the excavation succession, and is beneficial to the control of dynamic disasters such as rock burst and the like.
Description
Technical Field
The invention relates to the technical field of coal mining, in particular to a roadway arrangement method for reserving small coal pillars between stoping working faces.
Background
Reasonable setting of the section coal pillar width is a major scientific and technical problem facing the coal mine, and the reasonable setting of the section coal pillar width needs to comprehensively consider mining succession, disaster management and coal resource recovery rate. The adoption of the small coal pillars of 3-20 meters has important significance for improving the recovery rate of resources and preventing and controlling rock burst disasters, and is a reserving method advocated at present.
In the related art, due to the restriction of mining connection, a plurality of mines need to prepare adjacent continuous working surfaces before or during the mining of the last working surface, if small coal pillars are reserved, after the mining of the last working surface, the goaf roadway is seriously damaged and cannot be used for the stoping of the next working surface, so that large coal pillars of more than 20 meters are reserved, the resource loss is serious, and meanwhile, the risk of disaster accidents such as rock burst, coal and gas outburst and the like is increased due to the fact that the roadway is arranged in a high-stress area.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent.
Therefore, the embodiment of the invention provides a roadway arrangement method for reserving small coal pillars between stoping working surfaces, which can enable the small coal pillars to be reserved between two adjacent working surfaces, so that the stoping rate is improved, the resource loss is reduced, the influence damage of the stoping of the last working surface to the stoping roadway of the next working surface is avoided, the maintenance amount of the roadway and the occurrence risk of disaster accidents such as rock burst, coal and gas outburst and the like in the stoping process of the next working surface are reduced, and the safety of stoping operation is improved.
The roadway arrangement method for reserving small coal pillars between stoping working surfaces in the embodiment of the invention comprises the following steps:
S1: setting a separation line, wherein the separation line divides the first working surface into a first section and a second section along the stoping direction, and divides the second working surface into a third section and a fourth section;
S2: in the process of stoping the first working face, a transportation roadway, a cutting hole, a third section of return air roadway and an auxiliary roadway of the second working face are dug to construct a first return air system, and the auxiliary roadway is communicated with the third section of return air roadway and is positioned in the fourth section;
S3: after the first section and the second section are extracted, extracting the third section and digging a fourth section of return air lane, wherein the extraction of the third section is ventilated by using the first return air system;
S4: after the fourth section of the air return roadway is excavated, reserving or filling the auxiliary roadway;
S5: if the auxiliary roadway is filled, the transportation roadway, the cut hole and the fourth section of air return roadway form a second air return system, the second air return system is used for ventilation in the stoping of the fourth section,
Or if the auxiliary roadway is reserved, the transportation roadway, the cutting hole and the fourth section of air return roadway form a second air return system, the auxiliary roadway, the cutting hole and the fourth section of air return roadway form a third air return system, and the second air return system and the third air return system are used for ventilation in the stoping of the fourth section.
According to the roadway arrangement method for reserving small coal pillars between stoping working surfaces, which is disclosed by the embodiment of the invention, on one hand, the small coal pillars can be reserved between two adjacent working surfaces, so that the stoping rate is improved, the resource loss is reduced, on the other hand, the influence damage of stoping of the last working surface to the stoping roadway of the next working surface on the empty side is avoided, the occurrence risk of disaster accidents such as rock burst, coal and gas outburst in the stoping process of the next working surface is reduced, and the safety of stoping operation is improved.
In some embodiments, the roadway arrangement method for reserving small coal pillars between stopes comprises the following steps of: repeating the steps S1 to S5 until the stoping of all working surfaces is completed.
In some embodiments, in step S2, the tunneling of the third section return air roadway is performed after the first section stoping is completed.
In some embodiments, in the step S2, the auxiliary roadway includes a connecting roadway and an intermediate roadway, the intermediate roadway is disposed in the fourth section and extends along the stoping direction, one end of the connecting roadway is communicated with the third section of the return roadway, the other end of the connecting roadway is communicated with the intermediate roadway, and the intermediate roadway and the first working face are spaced by a safe distance.
In some embodiments, the safe distance is not less than 50 meters.
In some embodiments, the connecting lane and the intermediate lane form an included angle, and the included angle is an obtuse angle.
In some embodiments, in the step S5, if the auxiliary roadway remains, a damper is disposed in the fourth section of return air roadway, and the third section completes the stoping by using ventilation of the first return air system.
In some embodiments, in the step S5, if the auxiliary roadway remains, the damper is closed when the third section is back mined, and the auxiliary roadway is suitable for return air; and when the fourth section is stoped, the air door is opened, the transportation roadway and the auxiliary roadway are suitable for air intake, and the fourth section of air return roadway is suitable for air return.
In some embodiments, a coal pillar is left between the first working surface and the second working surface, and the width of the coal pillar is 3 meters to 20 meters.
In some embodiments, the transportation roadway, the auxiliary roadway, the fourth section return roadway are in communication with a large roadway.
Drawings
Fig. 1 is a schematic diagram of a first section of a post-extraction roadway layout for a first working face of a roadway layout method in accordance with an embodiment of the present invention.
Fig. 2 is a schematic diagram of roadway layout in a third-stage stope of a second working face of a roadway layout method in accordance with an embodiment of the present invention.
Fig. 3 is a schematic drawing of a mining after filling of an auxiliary roadway of a roadway layout method according to an embodiment of the present invention.
Fig. 4 is a schematic drawing of a mining after auxiliary roadway retention for the roadway layout method of an embodiment of the present invention.
Reference numerals:
a first working surface 1; a first section 11; a second section 12;
a second working surface 2; a third section 21; a fourth section 22;
A transport lane 3;
Cutting an eye 4;
a return airway 5; a third section of return air lane 51; a fourth section of return air duct 52;
an auxiliary roadway 6; a connecting lane 61; an intermediate lane 62; a filling material 63;
a coal pillar 7;
A main roadway 8;
a separation line 9.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
As shown in fig. 1 to 4, a roadway arrangement method (hereinafter referred to as roadway arrangement method) for reserving small coal pillars between stoping working surfaces according to an embodiment of the present invention includes the following steps:
S1: a dividing line 9 is established, the dividing line 9 dividing the first working surface 1 into a first section 11 and a second section 12, and the second working surface 2 into a third section 21 and a fourth section 22 along the extraction direction.
Specifically, as shown in fig. 1, a mining area may be arranged at one side of the roadway 8, a plurality of working surfaces may be divided in the mining area, and the plurality of working surfaces may be sequentially arranged along the left-right direction, and since the connection manner of two adjacent working surfaces may be the same, in this embodiment, two adjacent working surfaces are illustrated as an example, where the two adjacent working surfaces may be the first working surface 1 and the second working surface 2 respectively.
As shown in fig. 1, the main roadway 8 may extend along a left-right direction, the first working surface 1 and the second working surface 2 may be disposed at a rear side of the main roadway 8, where the first working surface 1 is located at a right side of the second working surface 2, and the first working surface 1 and the second working surface 2 may both adopt a back-to-back stoping mode, that is, the first working surface 1 and the second working surface 2 stope along a back-to-front direction, that is, a stoping direction in this embodiment is a back-to-front direction.
The separation line 9 may be a virtual line, the separation line 9 may extend in the left-right direction, and the first working surface 1 may be divided into a first section 11 and a second section 12 by the separation line 9, wherein the first section 11 is located at the rear side of the second section 12. The second working surface 2 may be divided by a dividing line 9 into a third section 21 and a fourth section 22, wherein the third section 21 is located at the rear side of the fourth section 22.
S2: in the process of stoping the first working face 1, a transportation roadway 3, a cutting hole 4, a third section of return air roadway 51 and an auxiliary roadway 6 of the second working face 2 are dug to construct a first return air system, and the auxiliary roadway 6 is communicated with the third section of return air roadway 51 and is positioned in the fourth section 22.
Specifically, as shown in fig. 1, in order to enable the first working surface 1 and the second working surface 2 to be quickly connected, in the process of stoping the first working surface 1, a stoping roadway may be arranged in the second working surface 2 in advance, where the stoping roadway includes a conveying roadway 3, a cut-off 4, a return air roadway 5 and an auxiliary roadway 6.
The conveying roadway 3, the cut hole 4, the third section return roadway 51 and the auxiliary roadway 6 in the second working face 2 need to be completed before the stoping of the first working face 1 is completed, and the fourth section return roadway 52 needs to be completed before the stoping of the first working face 1 is completed and before the stoping of the third section 21 of the second working face 2 is completed.
The stoping roadway comprises a conveying roadway 3, a cutting hole 4, a third section return air roadway 51 and an auxiliary roadway 6, as shown in fig. 1, the conveying roadway 3 can be arranged on the left side of the second working face 2, the third section return air roadway 51 and the auxiliary roadway 6 can be arranged on the right side of the second working face 2, and the cutting hole 4 is communicated between the conveying roadway 3 and the return air roadway 5. Wherein the transportation lane 3 can be used for transporting coal and air intake, the return air lane 5 can be used for returning air and transporting materials, and the cutting hole 4 is used for installing coal mining machinery to mine coal.
The auxiliary tunnel 6 is provided in the fourth section 22 of the second working face 2, the auxiliary tunnel 6 being in return air communication with the third section 21, whereby the third section return air tunnel 51 and the auxiliary tunnel 6 can be used for ventilation and form a first return air system through the transport tunnel 3, the cut-out 4.
In the process of driving the transport lane 3, the cutting hole 4, and the intermediate lane 62 of the second working face 2, the first working face 1 may perform extraction at the same time. In the process of tunneling the third section of the return air lane 51 and the connecting lane 61 of the second working face 2, the second section 12 of the first working face 1 can perform stoping simultaneously. The main purpose of the tunneling time arrangement is to make the tunneling tunnel in the second working face 2 less affected by the stoping of the first working face 1 under the condition of realizing normal connection of the working faces, so that the stoping tunnel of the second working face 2 can meet the use requirements of later ventilation and transportation materials.
S3: and after the first section 11 and the second section 12 are extracted, extracting the third section 21, digging a fourth section of return air lane 52, and ventilating the extraction of the third section 21 by using the first return air system.
Specifically, after the stoping of the first working face 1 is completed, the stoping roadway of the second working face 2 is already arranged in advance, the stoping of the third section 21 of the second working face 2 can be directly performed, ventilation can be performed by means of the first air return system in the stoping process, and the auxiliary roadway 6 in the first air return system can also be used for transporting materials.
In the process of the stoping of the third section 21, the tunneling of the fourth section return air lane 52 can be performed simultaneously, and as the stoping of the second section 12 of the first working face 1 is completed, the fourth section return air lane 52 cannot be influenced by the mining of the second section 12 in the tunneling process and after the tunneling, so that the fourth section return air lane 52 can meet the use requirement in the later stage, and the influence of accidents such as rock burst, coal and gas outburst can be reduced.
S4: after the fourth section of the return air tunnel 52 is excavated, the auxiliary tunnel 6 is reserved or filled.
Specifically, when the fourth-stage return air roadway 52 is driven, the stoping of the third stage 21 is still performed, and at this time, the auxiliary roadway 6 may be filled, or the auxiliary roadway 6 may be reserved.
When the auxiliary roadway 6 is filled, the filling material 63 can be used for filling, the filling material 63 can be filling paste, and after filling, the stoping of the third section 21 can be ventilated and conveyed through the fourth section return air roadway 52.
After the auxiliary roadway 6 is reserved, as shown in fig. 2, in the stoping process of the third section 21, ventilation and material transportation can be performed through the auxiliary roadway 6 and the fourth section return air roadway 52, or one of the auxiliary roadway 6 and the fourth section return air roadway 52 can be blocked and closed, and then ventilation and material transportation can be performed through the other one.
S5: if the auxiliary roadway 6 is filled, the transportation roadway 3, the cut-out 4 and the fourth section return air roadway 52 form a second return air system, and the stoping of the fourth section 22 is ventilated by the second return air system.
Specifically, as shown in fig. 3, after the auxiliary roadway 6 is filled, the secondary air return system formed by the conveying roadway 3, the cut-off hole 4 and the fourth-stage air return roadway 52 can be ventilated by the stoping of the fourth-stage 22. Thereby avoiding the situation that the auxiliary laneway 6 interferes with ventilation.
If the auxiliary roadway 6 remains, the transportation roadway 3, the cut-out 4 and the fourth section return air roadway 52 form a second return air system, the auxiliary roadway 6, the cut-out 4 and the fourth section return air roadway 52 form a third return air system, and the recovery of the fourth section 22 is ventilated by the second return air system and the third return air system.
Specifically, as shown in fig. 4, when the auxiliary tunnel 6 is reserved, the auxiliary tunnel 6 may be used as an auxiliary air intake tunnel, and when the fourth section 22 is mined, the fourth section 22 may be ventilated by means of the second air return system and the third air return system at the same time.
It should be noted that, in the process of digging the return air roadway 5 of the second working surface 2, a coal pillar 7 needs to be left between the first working surface 1 and the second working surface 2, and the setting of the coal pillar 7 can reduce the influence of the mining of the first working surface 1 on the second working surface 2, so that the mining safety of the second working surface 2 is improved.
According to the roadway arrangement method provided by the embodiment of the invention, on one hand, the auxiliary roadway 6 is additionally arranged to temporarily replace the fourth-section air return roadway 52, so that the condition that the fourth-section air return roadway 52 is easily influenced by the mining of the second section 12 is avoided, the occurrence risk of disaster accidents such as rock burst, coal and gas outburst and the like in the mining process of the second working face 2 is reduced, and the safety of the mining operation is improved.
Because the air return roadway 5 of the second working face 2 is small in mining influence, a small coal pillar 7 with a small width can be reserved between the first working face 1 and the second working face 2, so that the recovery rate and the mine production benefit are improved, and the resource loss is reduced.
In some embodiments, the roadway arrangement method for reserving small coal pillars between stopes comprises the following steps of: repeating the steps S1 to S5 until the stoping of all working surfaces is completed.
Specifically, one side of the roadway 8 may be provided with a plurality of working surfaces, which are sequentially arranged along the left-right direction, and the plurality of working surfaces may be divided into a plurality of first working surfaces 1 and a plurality of second working surfaces 2, and the plurality of first working surfaces 1 and the plurality of second working surfaces 2 may be alternately arranged along the left-right direction, and the mining order of the plurality of working surfaces may be sequentially mined in the order of the first working surfaces 1, the second working surfaces 2, and the succession of the adjacent two working surfaces may be performed in the steps of steps S1 to S5 until the stoping of all working surfaces is completed.
In some embodiments, in step S2, the tunneling of the third section return air lane 51 is performed after the first section 11 is completed.
Specifically, during the stoping of the first working face 1, the conveying roadway 3, the cutting hole 4 and the intermediate roadway 62 of the second working face 2 can be tunneled from one side of the main roadway 8 to the rear side, and when the first working face 1 is stoped to the second section 12, the third section air return roadway 51 and the connecting roadway 61 are tunneled, and the first air return system is formed after the third section air return roadway 51 and the connecting roadway 61 are communicated with the cutting hole 4 and the intermediate roadway 62.
It should be noted that, the tunneling of the third section air return roadway 51 and the connecting roadway 61 should be started after the first working face 1 is pushed to the front side of the separation line 9, that is, the first section 11 needs to be mined, so that the problem that the third section air return roadway 51 and the connecting roadway 61 are affected by the mining of the first section 11 can be avoided, the requirement of the third section air return roadway 51 and the connecting roadway 61 for later use is ensured, the condition that rock burst, coal and gas outburst are easily generated after the third section 21 air return is affected by the mining is avoided, and the mining safety is further ensured.
In some embodiments, in step S2, the auxiliary roadway 6 includes a connecting roadway 61 and an intermediate roadway 62, the intermediate roadway 62 being disposed within the fourth section 22 and extending in the stoping direction, one end of the connecting roadway 61 being in communication with the third section return roadway 51, the other end of the connecting roadway 61 being in communication with the intermediate roadway 62, the intermediate roadway 62 being spaced from the first working face 1 by a safe distance.
Specifically, as shown in fig. 1, the intermediate lane 62 may be provided at an intermediate position of the fourth section 22, and the intermediate lane 62 may extend generally in the front-rear direction, the communication lane 61 may be connected between the front end of the third section return lane 51 and the rear end of the intermediate lane 62, the communication lane 61 may extend in the left front-to-right rear direction, and the communication lane 61 may also extend in the left-to-right direction.
It will be appreciated that in other embodiments the auxiliary roadway 6 may be a tilt roadway, for example, the auxiliary roadway 6 may extend from the rear end of the third section return air roadway 51 to an intermediate position on the front side of the fourth section 22.
In some embodiments, the safe spacing is not less than 50 meters. Specifically, as shown in fig. 2, the safety distance L between the intermediate lane 62 and the first working surface 1 may be a value greater than 50 meters and less than the length of the cut-out 4, and for example, the safety distance L may be 50 meters, 55 meters, 60 meters, 65 meters, or the like. Thereby, the influence of the mining of the second section 12 on the intermediate roadway 62 is reduced, and the use safety of the auxiliary roadway 6 is improved.
In some embodiments, the connecting lane 61 and the intermediate lane 62 are angled and the angle is obtuse. Specifically, as shown in fig. 1 and fig. 2, the included angle formed by the connecting roadway 61 and the intermediate roadway 62 is an obtuse angle, and the included angle formed by the connecting roadway 61 and the third-stage return roadway 51 can also be an obtuse angle, so that the corner requirement of the conveying belt is met, and the arrangement of the conveying belt is facilitated.
In some embodiments, in step S5, if the auxiliary roadway 6 remains, a damper is disposed in the fourth section return air roadway 52, and the third section 21 completes the recovery using the ventilation of the first return air system.
Specifically, as shown in fig. 2, after the auxiliary roadway 6 remains, an air door may be installed in the fourth section of the air return roadway 52, and the air door plays a role in adjusting the air flow direction and the air quantity, so that in the process of stoping the third section 21, the air door may be closed, and the stoping of the third section 21 is still ventilated by means of the first air return system. The ventilation mode of the air current is simplified, and the condition that the back extraction of the third section 21 is easily influenced when ventilation is switched from the auxiliary roadway 6 to the fourth section return air roadway 52 is avoided.
In some embodiments, in step S5, if the auxiliary roadway 6 remains, the damper is closed and the auxiliary roadway 6 is adapted to return air when the third section 21 is mined; when the fourth section 22 is back mined, the air door is opened, the transportation roadway 3 and the auxiliary roadway 6 are suitable for air intake, and the fourth section air return roadway 52 is suitable for air return.
Specifically, when the damper is disposed in the fourth-stage return air lane 52, the damper may be closed when the third stage 21 is back-mined, as shown in fig. 2, and at this time, the third stage 21 is back-mined by the first return air system, and the damper may be opened when the fourth stage 22 is back-mined, as shown in fig. 4, and at this time, the transportation lane 3 and the auxiliary lane 6 are both used for air intake, and the fourth-stage return air lane 52 is used for return air, that is, the back-mining of the fourth stage 22 is ventilated by the second return air system and the third return air system.
In some embodiments, a coal pillar 7 is left between the first working surface 1 and the second working surface 2, and the width of the coal pillar 7 is 3 meters to 20 meters. Specifically, as shown in fig. 2, the width dimension M of the coal pillar 7 may be any value between 3 meters and 20 meters, for example, the width dimension M of the coal pillar 7 may be 3 meters, 5 meters, 7 meters, 8 meters, 11 meters, 13 meters, 15 meters, 16 meters, 18 meters, 20 meters, or the like.
In some embodiments, the haulage roadway 3, auxiliary roadway 6, fourth section return roadway 52 are in communication with the main roadway 8. Specifically, as shown in fig. 1 to 4, the right end of the transportation lane 3, the right end of the auxiliary lane 6 and the right end of the fourth section return air lane 52 are communicated with the corresponding main lane 8, thereby facilitating the circulation of air flow in the transportation lane 3, the auxiliary lane 6 and the return air lane 5.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (9)
1. The roadway arrangement method for reserving small coal pillars between stoping working surfaces is characterized by comprising the following steps of:
S1: setting a separation line, wherein the separation line divides the first working surface into a first section and a second section along the stoping direction, and divides the second working surface into a third section and a fourth section;
S2: in the process of stoping the first working face, a transportation roadway, a cutting hole, a third section of return air roadway and an auxiliary roadway of the second working face are dug to construct a first return air system, and the auxiliary roadway is communicated with the third section of return air roadway and is positioned in the fourth section;
In the step S2, the auxiliary roadway includes a connecting roadway and an intermediate roadway, the intermediate roadway is arranged in the fourth section and extends along the stoping direction, one end of the connecting roadway is communicated with the third section of return air roadway, the other end of the connecting roadway is communicated with the intermediate roadway, and the intermediate roadway and the first working face are spaced by a safe distance;
The first working face is subjected to stoping simultaneously in the process of tunneling in a transportation roadway, a cutting hole and a middle roadway of the second working face, and the second working face is subjected to stoping simultaneously in the process of tunneling in a third section of return roadway and a connecting roadway of the second working face;
the transportation roadway, the cutting hole, the third section return air roadway and the auxiliary roadway in the second working face are completed before the stoping of the first working face is finished, the fourth section return air roadway starts tunneling after the stoping of the first working face is finished, and the fourth section return air roadway is completed before the stoping of the third section of the second working face is finished;
S3: after the first section and the second section are extracted, extracting the third section and digging a fourth section of return air lane, wherein the extraction of the third section is ventilated by using the first return air system; a coal pillar is reserved between the first working surface and the second working surface in the digging process of the return airway of the second working surface;
S4: after the fourth section of the air return roadway is excavated, reserving or filling the auxiliary roadway;
S5: if the auxiliary roadway is filled, the transportation roadway, the cut hole and the fourth section of air return roadway form a second air return system, the second air return system is used for ventilation in the stoping of the fourth section,
Or if the auxiliary roadway is reserved, the transportation roadway, the cutting hole and the fourth section of air return roadway form a second air return system, the auxiliary roadway, the cutting hole and the fourth section of air return roadway form a third air return system, and the second air return system and the third air return system are used for ventilation in the stoping of the fourth section.
2. The roadway layout method for reserving small coal pillars among stopes according to claim 1, which is characterized by comprising the following steps of: repeating the steps S1 to S5 until the stoping of all working surfaces is completed.
3. The roadway layout method for reserving small coal pillars between stopes according to claim 1, wherein in step S2, the tunneling of the third section of return air roadway is performed after the first section of stopes is completed.
4. The roadway layout method for reserving small coal pillars between stopes according to claim 1, wherein the safety distance is not less than 50 meters.
5. The roadway layout method for reserving small coal pillars between stopes according to claim 1, wherein the connecting roadway and the middle roadway form an included angle, and the included angle is an obtuse angle.
6. The method according to claim 1, wherein in step S5, if the auxiliary roadway remains, a damper is disposed in the fourth section of return air roadway, and the third section completes the recovery by ventilation of the first return air system.
7. The method according to claim 6, wherein in step S5, if the auxiliary roadway remains, the damper is closed during the stoping of the third section, and the auxiliary roadway is adapted to return air; and when the fourth section is stoped, the air door is opened, the transportation roadway and the auxiliary roadway are suitable for air intake, and the fourth section of air return roadway is suitable for air return.
8. The roadway layout method for reserving small coal pillars between stopes according to claim 1, wherein the width of the coal pillars is 3 meters to 20 meters.
9. The roadway layout method of a stope face with small coal pillars left between the stope face according to any one of claims 1-8, wherein the transportation roadway, the auxiliary roadway and the fourth section return roadway are communicated with a main roadway.
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