CN217976301U - Withdrawing structure - Google Patents

Abstract

The utility model provides a withdrawal structure, include: the main withdrawing channel is internally provided with filler so as to support the top wall of the main withdrawing channel; the auxiliary withdrawing channel is positioned on one side of the main withdrawing channel, which is far away from the stoping line; and the communication channel is communicated with the main withdrawing channel and the auxiliary withdrawing channel. The technical scheme of the application can effectively solve the problems of high cost, low efficiency, high risk and the like of the withdrawal process in the related technology.

Description

Withdrawing structure

Technical Field

The utility model relates to a coal mining technical field particularly, relates to a withdrawal structure.

Background

In the related art, when the fully mechanized coal mining face is recovered to a mining stop line, the devices such as a face coal mining machine, a scraper conveyor and a bracket need to be retracted, and the current retraction process is roughly divided into two types:

the first type is a self-digging main withdrawing channel withdrawing process, which mainly means that when a coal face is withdrawn to a stoping line, a hydraulic support stops moving forwards, a working face coal mining machine and a scraper conveyor continue to advance for 4-6 cycles, so that withdrawing space is formed, and then a winch and a flat car are used for withdrawing the support back and forth through an air return gate, equipment is completely operated in an empty top environment in the withdrawing process of the withdrawing process, safety cannot be guaranteed, and the equipment is extremely easy to be crushed or casualties are caused once the equipment is exposed to a working face with large burial depth, long working face and strong mine pressure;

the second type is a pre-digging main withdrawing channel withdrawing process, which mainly comprises the steps of digging a main withdrawing channel by utilizing tunneling equipment in advance and supporting the main withdrawing channel to form a withdrawing space in advance, then utilizing anchor rods, anchor cables, metal nets, high-strength polyester flexible nets and the like to make an artificial protection net on a working face in advance along with the pushing of the working face before the working face is withdrawn to a certain distance (generally determined by the empty top area of the support and the structure of the support) away from a stopping production line, covering all supports on the working face under the artificial protection net when the working face is pushed to the stopping production line, and realizing safe withdrawing by withdrawing personnel through winches or plate cars in the withdrawing channel in an environment with top support. The withdrawing process ensures safety, but the manual protective net manufactured during the fully mechanized mining end mining period has the defects of high cost, low efficiency and the like.

SUMMERY OF THE UTILITY MODEL

The main object of the utility model is to provide a withdrawal structure to there is not enough problems with high costs, efficiency is slow, danger big etc. in the withdrawal technology of solving among the correlation technique.

In order to achieve the above object, the utility model provides a withdrawing structure, include: the main withdrawing channel is internally provided with filler so as to support the top wall of the main withdrawing channel; the auxiliary withdrawing channel is positioned on one side of the main withdrawing channel, which is far away from the stoping line; and the communication channel is communicated with the main withdrawing channel and the auxiliary withdrawing channel.

Further, the filler fills the main withdrawal passage.

Further, the filler includes gangue and/or sand.

Further, the width of the main retraction channel is greater than the length of the face support.

Further, a supporting structure is arranged at the top wall of the main withdrawing channel.

Further, the support structure comprises: the double-layer lead wire mesh is arranged on the top wall of the main withdrawing channel; the steel belts are arranged at intervals along the length direction of the main withdrawing channel, and each steel belt extends along the width direction of the main withdrawing channel; and the anchor rods and the anchor cables are arranged on the steel belts.

Furthermore, each steel belt is provided with at least one anchor cable, and the anchor cables on two adjacent steel belts are arranged in a staggered mode.

Further, the plurality of steel belts comprise a plurality of round steel belts and a plurality of pi-shaped steel belts, and the plurality of round steel belts and the plurality of pi-shaped steel belts are arranged alternately.

Furthermore, a plurality of anchor rods are arranged on each round steel strip at intervals, and each anchor rod comprises a threaded steel anchor rod.

Furthermore, the communicating channels are arranged at intervals in the length direction of the main withdrawing channel, and the distance between every two adjacent communicating channels is larger than the width of each communicating channel.

Use the technical scheme of the utility model, utilize entry driving machine equipment to dig main withdrawal passageway, supplementary withdrawal passageway and intercommunication passageway in advance to pack the filler that is used for supporting the roof of main withdrawal passageway at main withdrawal passageway, with the stability of guaranteeing main withdrawal passageway, make main withdrawal passageway even place for a long time and can not appear the roof condition such as sink yet. Therefore, the main withdrawing channel can be set to be wider (a withdrawing channel with a large section is formed), when the working face withdraws to a distance away from the stoping line, a manual protective net is not needed to be made in advance, the equipment is directly driven into the main withdrawing channel, and the withdrawing efficiency is effectively improved on the premise of ensuring the safety. Therefore, the technical scheme of the application can effectively solve the problems of high cost, low efficiency, high risk and the like of the withdrawal process in the related technology.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the scope of the invention. In the drawings:

figure 1 shows a schematic top view of an embodiment of a withdrawal structure according to the present invention, wherein the working face is recovered to a stope line;

FIG. 2 shows a schematic side view of the withdrawal configuration of FIG. 1 with the face being recovered to a location at a distance from the stope line; and

fig. 3 shows a schematic top view of the retraction configuration of fig. 1, wherein the devices are all located within the main retraction channel and are progressively retracted.

Wherein the figures include the following reference numerals:

10. a primary retract channel; 20. a filler; 30. an auxiliary retraction channel; 40. stopping the mining line; 50. a communication channel; 60. a working face support; 70. a support structure; 71. double-layer lead wire mesh sheets; 72. a steel belt; 721. a round steel strip; 722. a pi-shaped steel belt; 73. an anchor rod; 74. an anchor cable; 81. returning air to the crossheading; 82. a glue transportation crossheading; 83. and (7) stacking wood.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.

As shown in fig. 1 to 3, the retraction structure of the present embodiment includes: a main retraction channel 10, an auxiliary retraction channel 30 and a communication channel 50. Wherein, a filler 20 is arranged in the main retracting channel 10 to support the top wall of the main retracting channel 10; the auxiliary withdrawing channel 30 is positioned on one side of the main withdrawing channel 10 far away from the stoping line 40; the communication passage 50 communicates the main retracting passage 10 and the auxiliary retracting passage 30.

By applying the technical scheme of the embodiment, the main withdrawing channel 10, the auxiliary withdrawing channel 30 and the communicating channel 50 are dug by the heading machine equipment in advance, and the main withdrawing channel 10 is filled with the filler 20 for supporting the top wall of the main withdrawing channel 10, so as to ensure the stability of the main withdrawing channel 10, and the top wall does not sink even if the main withdrawing channel 10 is placed for a long time. Therefore, the main withdrawing channel 10 can be set to be wider (forming a withdrawing channel with a large section), when the working face is withdrawn to a distance away from the stoping line 40, a manual protective net does not need to be made in advance, the equipment is directly driven into the main withdrawing channel 10, and the withdrawing efficiency is effectively improved on the premise of ensuring the safety. Therefore, the technical scheme of the embodiment can effectively solve the problems of high cost, low efficiency, high risk and the like of the withdrawal process in the related technology.

Specifically, in the present embodiment, the filler 20 fills the main withdrawing channel 10. The filling material 20 is a block structure or a granular structure, and the term "filling" refers to the block structure or the granular structure contacting each wall surface of the main retracting channel 10 to effectively support each wall surface of the main retracting channel 10, so as to ensure the supporting effect on the main retracting channel 10.

As shown in fig. 2, the filler 20 includes gangue and/or sand. Wherein, sand is common building material, and the waste rock is the material that can form in the coal mining process, uses one or two of above-mentioned two kinds of materials as filler 20 has the advantage that the material is easily acquireed and the cost is low.

Specifically, in the present embodiment, the width of the main retracting channel 10 is greater than the length L1 of the face support 60, and a support structure 70 is provided at the top wall of the main retracting channel 10. When the coal face is recovered to the stopping line 40, the coal face is continuously pushed until the tail beam of the working face support 60 crosses the stopping line 40, at the moment, the filler 20 in the main withdrawing channel 10 is mined by the coal mining machine and is conveyed out by the conveyor, all the equipment enters the main withdrawing channel 10, namely all the equipment is positioned below the supporting structure 70, and at the moment, the equipment is withdrawn again, so that the safety of personnel and equipment in the withdrawing process can be effectively ensured. Specifically, the width of the main retracting channel 10 is the minimum width (which is determined by the combination of the headspace area of the face support 60, the structure of the shearer loader, the width of the scraper conveyor, etc.) that ensures sufficient retracting space. As shown in fig. 1, the "length L1 of the face support 60" refers to a distance between both ends of the face support 60 in the extraction direction.

Specifically, the removal sequence of the working face equipment is as follows: firstly, the rubber belt conveyor in the rubber conveying crossheading 82 is removed; then, removing the tail of the conveyor and the coal mining machine, removing the head of the conveyor, and finally removing the reversed loader; before the scraper conveyor is dismantled, the cables on the working face are dismantled; the winch and the support vehicle are used for secondarily retracting the to-be-retracted working face support 60 through the main retracting channel 10, the auxiliary retracting channel 30 and the communication channel 50 (as shown in fig. 3), and meanwhile, a wood pile 83 is arranged in an area where the retracted working face support 60 is originally located for supporting.

Specifically, as shown in fig. 1, the support structure 70 includes: a double layer lead wire mesh 71, a plurality of steel strips 72, a plurality of anchor rods 73 and a plurality of anchor cables 74. Wherein, the double-layer lead wire mesh 71 is arranged on the top wall of the main withdrawing channel 10; a plurality of steel strips 72 are arranged at intervals along the length direction of the main retracting channel 10, and each steel strip 72 extends along the width direction of the main retracting channel 10; a plurality of anchor rods 73 and a plurality of anchor lines 74 are provided on the plurality of steel strips 72. The double-layer lead wire mesh 71, the steel belts 72, the anchor rods 73 and the anchor cables 74 are used for supporting the top wall of the main withdrawing channel 10, so that the supporting strength can be effectively guaranteed, and the safety of personnel and equipment in the withdrawing process is further guaranteed.

Furthermore, because of the long periods of coal mining (typically 1 to 2 years or even longer), the retraction structures are already excavated between withdrawals, i.e. there is a long time interval between the formation of the retraction structure and the use of the retraction structure. The supporting structure 70 is matched with the filler 20 to support the main withdrawing channel 10 together, so that the top wall of the main withdrawing channel 10 is prevented from sinking and the like in the coal mining process, and the normal use of the main withdrawing channel 10 during the withdrawal of the equipment is ensured.

During specific construction, after the main withdrawal passage 10 is tunneled, the supporting structure 70 is arranged in the main withdrawal passage 10, and after the supporting structure 70 is arranged, the filler 20 is filled into the main withdrawal passage 10 to densely fill the main withdrawal passage 10 (of course, the filling may be performed before the withdrawal, or the filling may be performed gradually in the withdrawal process, for example, gangue generated in the withdrawal process is directly transported into the main withdrawal passage 10 until the gangue fills the main withdrawal passage 10).

Specifically, as shown in fig. 1 and 2, at least one anchor cable 74 is disposed on each steel strip 72, and the anchor cables 74 on two adjacent steel strips 72 are arranged in a staggered manner. Namely, the anchor cables 74 are arranged in five flowers, so that the number of the anchor cables 74 can be reduced while the supporting effect is ensured, and the cost is reduced.

As shown in fig. 1 and 2, in the present embodiment, the plurality of steel belts 72 includes a plurality of round steel belts 721 and a plurality of pi-type steel belts 722, and the plurality of round steel belts 721 and the plurality of pi-type steel belts 722 are alternately arranged. The pi-shaped steel strip 722 has the advantage of strong supporting capacity, but the price is high; the round steel strip 721 has the advantage of low cost, but its supporting effect is relatively weak. The round steel strips 721 and the pi-shaped steel strips 722 are alternately arranged, so that cost and a supporting effect can be considered.

Specifically, a plurality of anchor rods 73 are arranged on each round steel strip 721 at intervals, and the anchor rods 73 comprise deformed steel bar anchor rods.

As shown in fig. 1 and 3, in the present embodiment, the communication passage 50 is plural, the plural communication passages 50 are arranged at intervals along the length direction of the main retracting passage 10, and the distance between two adjacent communication passages 50 is larger than the width of the communication passage 50. When the air is returned, the equipment in the main return duct 10 adjacent to a certain communication duct 50 can be transported to the auxiliary return duct 30 through the communication duct 50 and then transported out through the return air chute 81. Therefore, the transportation path of the equipment in the transportation process can be shortened as much as possible, and the withdrawal efficiency is improved. The distance between two adjacent communication passages 50 is greater than the width of the communication passage 50, which can secure the strength of the withdrawing structure.

As shown in fig. 2, the support structure 70 may be disposed on the top wall of the main retracting tunnel 10, or may be disposed on the side wall of the main retracting tunnel 10 close to the communication tunnel 50, and when the support structure 70 is disposed on the side wall of the main retracting tunnel 10, the communication tunnel 50 needs to be avoided.

By applying the technical scheme of the embodiment, the withdrawing operation can be avoided under the condition that the main withdrawing channel 10 is empty, and the occurrence of equipment death or casualty accidents can be effectively avoided; meanwhile, the condition that a manual protective net is required to be made in advance when the mining line is close to in the related technology can be avoided, the fully mechanized mining and final mining withdrawing efficiency can be improved under the condition of ensuring the personnel safety, and the production cost of a mine can be saved.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

For ease of description, spatially relative terms such as "over 8230 \ 8230;,"' over 8230;, \8230; upper surface "," above ", etc. may be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; 'above" may include both orientations "at 8230; \8230;' above 8230; 'at 8230;' below 8230;" above ". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms do not have special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by 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 (10)

1. A retraction structure, comprising:

a main retraction channel (10), wherein a filler (20) is arranged in the main retraction channel (10) to support the top wall of the main retraction channel (10);

the auxiliary withdrawing channel (30) is positioned on one side, far away from the stoping line (40), of the main withdrawing channel (10);

a communication passage (50) communicating the main retracting passage (10) and the auxiliary retracting passage (30).

2. A retraction structure according to claim 1, characterized in that the filling (20) fills the main retraction channel (10).

3. The retraction structure according to claim 1, characterized in that the filling (20) comprises gangue and/or sand.

4. A retraction structure according to claim 1, characterized in that the width of the main retraction channel (10) is larger than the length of the face support (60).

5. The pullback structure as claimed in any one of claims 1 to 4, characterized in that a support structure (70) is provided at the top wall of the main pullback channel (10).

6. The retraction structure according to claim 5, characterized in that the support structure (70) comprises:

a double layer lead wire mesh (71) arranged at the top wall of the main retraction channel (10);

a plurality of steel strips (72) arranged at intervals along the length direction of the main retracting channel (10), wherein each steel strip (72) extends along the width direction of the main retracting channel (10);

a plurality of anchor rods (73) and a plurality of anchor lines (74) disposed on the plurality of steel strips (72).

7. The retraction structure according to claim 6, characterized in that at least one of said anchor lines (74) is provided on each of said steel belts (72), and the anchor lines (74) on two adjacent steel belts (72) are arranged in a staggered manner.

8. The pullback structure as claimed in claim 6, wherein the plurality of steel belts (72) comprises a plurality of round steel belts (721) and a plurality of pi-type steel belts (722), and the plurality of round steel belts (721) and the plurality of pi-type steel belts (722) are alternately arranged.

9. The retraction structure according to claim 8, characterized in that a plurality of said anchor rods (73) are arranged on each of said round steel strips (721) at intervals, said anchor rods (73) comprising threaded steel anchor rods.

10. The pullback structure as claimed in any one of claims 1 to 4, wherein the communication channel (50) is plural, the plural communication channels (50) are arranged at intervals along the length direction of the main pullback channel (10), and the distance between two adjacent communication channels (50) is larger than the width of the communication channel (50).

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