CN214464396U - Gob-side entry retaining mining area side sealing structure - Google Patents
Gob-side entry retaining mining area side sealing structure Download PDFInfo
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- CN214464396U CN214464396U CN202023054446.2U CN202023054446U CN214464396U CN 214464396 U CN214464396 U CN 214464396U CN 202023054446 U CN202023054446 U CN 202023054446U CN 214464396 U CN214464396 U CN 214464396U
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Abstract
The utility model provides a gob entry mining area side enclosed construction relates to coal mining technical field. The gob-side entry retaining mining area side sealing structure comprises a gob-side entry retaining and a sealing wall located on the gob-side entry retaining wind mining area side, wherein the sealing wall comprises a wall body arranged on the bottom wall of the gob-side entry retaining, and the wall body extends along the length direction of the gob-side entry retaining; a first elastic sealing body is clamped between the top of the wall body and the top wall of the gob-side entry retaining, and a polyurethane foaming agent is filled in a gap between the first elastic sealing body and the top wall. In the gob-side entry retaining mining area side sealing structure, the first elastic sealing body in the sealing wall can deform correspondingly along with the sinking of the gob-side entry retaining top wall, so that the effective sealing and supporting effect of the sealing wall on the top wall is ensured; polyurethane foaming agent is filled in the gap between the first elastic sealing body and the top wall, so that the connection sealing performance of the first elastic sealing body and the top wall can be further improved, and the isolation sealing performance of the sealing wall on the gob-side entry retaining is correspondingly further improved.
Description
Technical Field
The utility model relates to a coal mining technical field particularly, relates to an airtight structure of gob entry mining area side.
Background
The gob-side entry retaining means that after the working face of the upper section is mined, the original working face roadway is retained by reinforcing support or other effective methods to be used as a return airway during mining of the working face of the lower section, and at the moment, one side of the retained roadway is a gob and the other side of the retained roadway is a coal body, so that one roadway can be used twice. According to the analysis of the existing coal pillar-free continuous mining system, the gob-side entry retaining can improve the mining rate of a mine by more than 10 percent, the tunneling rate and the maintenance cost of a roadway can be reduced by about 30 percent, the gob-side entry retaining technology can greatly reduce the mine excavation amount, relieve the shortage of excavation and replacement, shorten the moving time of a working face and the like, and is a great reform of the coal mining and recovery roadway supporting technology.
The key of the gob-side entry retaining is that a closed supporting structure must be constructed on the goaf side, the prior applied closed supporting structures are wood piles, dense pillars, concrete blocks, filling walls and the like, but along with the stoping of a working face, the closed supporting structure bears the weight of breaking a direct roof, so that the closed supporting structure is easy to deform or even break, the gob-side entry retaining cannot be continuously supported in a closed supporting manner, and the coal mining is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a gob entry mining area side enclosed construction to solve the easy deformation of weight of current airtight supporting construction bearing direct roof and split even, can't continue to play airtight supporting effect to gob entry, and then influence coal mining's technical problem.
In order to solve the problems, the utility model provides a gob-side entry retaining mining area side airtight structure, which comprises a gob-side entry retaining and an airtight wall located at the gob-side entry retaining wind mining area side, wherein the airtight wall comprises a wall body arranged on the bottom wall of the gob-side entry retaining, and the wall body extends along the length direction of the gob-side entry retaining; a first elastic sealing body is clamped between the top of the wall body and the top wall of the gob-side entry retaining, and a polyurethane foaming agent is filled in a gap between the first elastic sealing body and the top wall.
Optionally, a gap between the wall and a crushing roadway side of the gob-side entry retaining is filled with a sealing layer.
Optionally, the material of the sealing layer is a flame-retardant polyurethane foaming agent.
Optionally, one end of the first elastic sealing body extends out of the wall body and abuts against the crushing roadway side.
Optionally, the first elastic sealing body comprises a plurality of high-water-material elastic filling bags, the high-water-material elastic filling bags are sequentially arranged along the length direction of the wall body, and an overlapping area exists between every two adjacent high-water-material elastic filling bags.
Optionally, the overlapped areas of two adjacent high-water material elastic filling bags are hermetically connected through a sealing connector.
Optionally, the top end of the wall body is provided with a limiting groove, the limiting groove extends along the length direction of the wall body, and the bottom ends of the plurality of high-water-material elastic filling bags are inserted into the limiting groove.
Optionally, a support beam is arranged in the gob-side entry retaining.
Optionally, a plurality of communication holes are formed in the lower area of the wall body, the communication holes are arranged at intervals along the extending direction of the wall body, and the communication holes are used for injecting the flame-retardant polyurethane foaming agent into the lower area of the gap between the wall body and the crushing roadway wall; and each communicating hole is plugged with a plug.
Optionally, a fixed boss is arranged on the bottom wall of the gob-side entry retaining, the fixed boss extends along the length direction of the gob-side entry retaining, the fixed boss, the bottom wall and the wall body jointly form a fixed groove, and a second elastic sealing body is installed in the fixed groove.
The utility model provides a gob entry side airtight structure, the sealed wall includes the wall body as separating and keeping off and supporting the main part, the first elastic sealing body of shutoff between wall body top and gob entry roof, and the gap between first elastic sealing body and the roof is filled with the polyurethane foaming agent, firstly, the roof of gob entry is anomalous wall, first elastic sealing body can adapt to the clearance between roof and the wall body and carry out corresponding deformation, thereby can be better sealing connection between roof and wall body, thereby improve the leakproofness that the sealed wall separates between gob entry and goaf, correspondingly improve the gas tightness of gob entry, ensure the normal operation of coal mining; secondly, the top wall sinks gradually under the action of self gravity and other vibration, the first elastic sealing body is extruded downwards in the sinking process of the top wall, the first elastic sealing body deforms correspondingly, gaps between the top wall and the wall body can be plugged more tightly, and the first elastic sealing body can deform, so that the pressing strength applied to the wall body by the top wall is reduced, the situation that the wall body is easy to deform due to large pressing strength and even breaks and collapses is reduced, the service life of the sealing wall is prolonged correspondingly, and the sealing supporting effect of the sealing wall on the gob-side entry retaining is ensured; and the polyurethane foaming agent is filled in the gap between the first elastic sealing body and the top wall, so that the sealing performance of the first elastic sealing body connected with the top wall is effectively improved, the isolation sealing performance of the sealing wall on gob-side entry retaining and a goaf is correspondingly further improved, and along with the sinking of the top wall, the polyurethane foaming agent with certain elasticity can also deform along with the isolation sealing performance, and accordingly the gap between the top wall and the first elastic sealing body is blocked.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic cross-sectional view of a side sealing structure of a gob-side entry retaining mining area provided by the present invention;
FIG. 2 is a schematic partial front view of the enclosure wall of FIG. 1 supported on a direct roof;
fig. 3 is a schematic cross-sectional view of the gob-side entry retaining gob-side sealing structure provided by the present invention in another form;
FIG. 4 is an enlarged view of a portion of FIG. 3;
fig. 5 is the main view schematic diagram when the wall body is equipped with the intercommunicating pore in the gob-side entry retaining mining area side airtight structure provided by the utility model.
Description of reference numerals:
10-a goaf; 11-crushing lane walls; 20-gob-side entry retaining; 21-a top wall; 22-a bottom wall; 30-a coal body; 40-immediate roof; 50-a primary roof; 100-a closed wall; 110-a wall body; 111-communicating holes; 120-a first elastomeric seal body; 130-a sealing layer; 200-a support beam; 300-fixing the boss; 310-fixed slots; 400-a second elastomeric seal.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment provides a gob-side entry retaining mining area side sealing structure, as shown in fig. 1 and fig. 2, including a gob-side entry retaining 20 and a sealing wall located at a wind-taking area side of the gob-side entry retaining 20, where the sealing wall 100 includes a wall 110 disposed on a bottom wall 22 of the gob-side entry retaining 20, and the wall 110 extends along a length direction of the gob-side entry retaining 20; a first elastic sealing body 120 is clamped between the top of the wall 110 and the top wall 21 of the gob-side entry retaining 20, and a gap between the first elastic sealing body 120 and the top wall 21 is filled with a polyurethane foaming agent.
The gob-side sealing structure for gob-side entry retaining provided by this embodiment includes a gob-side entry retaining 20 for assisting coal 30 mining, one side of the gob-side entry retaining 20 facing the gob 10 is a broken lane 11, and a sealing wall 100 is disposed on the inner side of the broken lane 11 to isolate the gob-side entry retaining 20 from the gob 10 for use as a return airway, wherein the sealing wall 100 includes a wall 110 serving as a partition and support main body, and a first elastic sealing body 120 plugged between the top end of the wall 110 and a top wall 21 of the gob-side entry retaining 20, and a gap between the first elastic sealing body 120 and the top wall 21 is filled with a polyurethane foaming agent, first, the top wall 21 of the gob-side entry retaining 20 is an irregular wall surface, and the first elastic sealing body 120 can adapt to a gap between the top wall 21 and the wall 110 to deform correspondingly, so as to be connected between the top wall 21 and the wall 110 in a sealing manner well, and thus improving the sealing performance of the gob-side entry retaining 100 between the gob-side entry retaining 20 and the gob 10, the air tightness of the gob-side entry retaining 20 is correspondingly improved, and the normal operation of coal mining is ensured; secondly, the top wall 21 gradually sinks under the action of self gravity and other vibration effects, the first elastic sealing body 120 is downwards extruded in the sinking process of the top wall 21, the first elastic sealing body 120 correspondingly deforms, a gap between the top wall 21 and the wall 110 can be more tightly plugged, and the first elastic sealing body 120 can deform, so that the pressing strength of the top wall 21 on the wall 110 is reduced, the situation that the wall 110 is high in pressing strength and easy to deform and even break and collapse is reduced, the service life of the sealing wall 100 is correspondingly prolonged, and the sealing and supporting effect of the sealing wall 100 on the gob-side entry retaining 20 is ensured; and thirdly, the gap between the first elastic sealing body 120 and the top wall 21 is filled with a polyurethane foaming agent, so that the sealing property of the first elastic sealing body 120 connected with the top wall 21 is effectively improved, the isolation sealing property of the sealing wall 100 on the gob-side entry retaining 20 and the gob 10 is correspondingly further improved, and along with the sinking of the top wall 21, the polyurethane foaming agent with certain elasticity can also deform along with the deformation, and accordingly the gap between the top wall 21 and the first elastic sealing body 120 is guaranteed to be blocked.
In the gob-side entry retaining mining area side sealing structure, the first elastic sealing body 120 in the sealing wall 100 can deform correspondingly along with the sinking of the top wall 21 of the gob-side entry retaining 20, so that the blocking tightness of the sealing wall 100 can be improved, the damage to the wall body 110 caused by the sinking of the top wall 21 can be reduced, and the effective sealing and supporting effect of the sealing wall 100 on the top wall 21 is correspondingly ensured; polyurethane foaming agent is filled in the gap between the first elastic sealing body 120 and the top wall 21, so that the connection sealing performance of the first elastic sealing body 120 and the top wall 21 can be further improved, and accordingly, the isolation sealing performance of the sealing wall 100 on the gob-side entry retaining 20 can be further improved.
Specifically, when the wall 110 is built, the gap between the top of the wall 110 and the top wall 21 of the gob-side entry retaining 20 may be approximately 15 cm; as shown in fig. 1, the top of the gob-side entry 20 may be the immediate roof 40, i.e. the bottom wall 22 of the immediate roof 40 is the top wall 21 of the gob-side entry 20; the top of the immediate roof 40 is a basic roof 50.
Alternatively, in this embodiment, as shown in fig. 1, the gap between the wall 110 and the crushing roadway side 11 of the gob-side entry 20 may be filled with the sealing layer 130. The airtight layer 130 can fill the gap between the wall 110 and the broken roadway side 11, on one hand, the airtight layer 130 can be used as a barrier layer to perform secondary barrier on the outer side of the wall 110, and has a plugging effect on wall seams and the like of the wall 110, so that the barrier sealing performance of the airtight wall 100 on the gob 10 and the gob-side entry retaining 20 is further improved, the air tightness of the gob-side entry retaining 20 is correspondingly further improved, and the air return effect of the gob-side entry retaining 20 on a coal mining area is ensured; on the other hand, the sealing layer 130 can also play a role in supporting and limiting the broken roadway slope 11, so that the stability of the broken roadway slope 11 is improved, the damage to the stability of the wall 110 caused by the downward sliding of the broken stones of the broken roadway slope 11 is reduced, and the stability of the sealing wall 100 is improved.
Specifically, in this embodiment, the material of the sealing layer 130 may be a flame-retardant polyurethane foaming agent. The material is a specific material of the sealing layer 130, wherein the flame-retardant polyurethane foaming agent can flow along the shape of the gap when being sprayed into the gap between the wall 110 and the broken roadway wall 11 to fully fill the gap, the sealing layer 130 is formed after the flame-retardant polyurethane foaming agent is solidified, the sealing layer 130 has certain strength and certain elasticity, so that the gap between the wall 110 and the broken roadway wall 11 can be effectively sealed, and the broken roadway wall 11 can be supported and limited to a certain extent. In addition, the flame-retardant polyurethane foaming agent is adopted, so that the flame can be effectively isolated, the functionality of the airtight wall 100 is improved, and the safety of the gob-side entry retaining 20 is correspondingly improved. Of course, in other embodiments, other materials may be used for the sealing layer 130, such as a high-foaming layer made of polypropylene fiber material.
Optionally, in this embodiment, as shown in fig. 1, one end of the first elastic sealing body 120 extends out of the wall 110 and abuts against the crushing ledge 11. The first elastic sealing body 120 comprises a first sealing part positioned at the top of the wall body 110 and a second sealing part extending out of the wall body 110, wherein compared with the arrangement of only the first sealing part, the tops of the first sealing part and the second sealing part are both in butt joint sealing with the top wall 21 of the gob-side entry retaining 20, the contact area is large, and the connection sealing performance is higher, so that the connection sealing performance of the sealing wall 100 and the top wall 21 is further improved, and the air tightness of the gob-side entry retaining 20 is correspondingly further improved; in addition, the second sealing portion abuts against the upper region of the crushing lane wall 11, and can support and limit the crushing lane wall 11 in the region, so that the stability of the crushing lane wall 11 in the region is improved.
Specifically, in this embodiment, as shown in fig. 2, the first elastic sealing body 120 may include a plurality of high-water-content elastic filling bags, the plurality of high-water-content elastic filling bags are sequentially arranged along the length direction of the wall 110, and an overlapping region exists between two adjacent high-water-content elastic filling bags. Here, it is a specific form of the first elastic sealing body 120, wherein a plurality of high water material elastic filling bags are sequentially arranged along the length direction of the wall 110 to form a long first elastic sealing body 120, so as to seal the gap between the top end of the wall 110 and the top wall 21 of the gob-side entry retaining 20; in addition, along the length direction of the wall body 110, an overlapping area exists between every two adjacent high-water-content material elastic filling bags, and the gap between every two adjacent high-water-content material elastic filling bags is reduced to improve the connection sealing performance of the two adjacent high-water-content material elastic filling bags, so that the sealing performance of the first elastic sealing body 120 per se and the sealing performance of the first elastic sealing body 120 for blocking between the wall body 110 and the top wall 21 of the gob-side entry retaining 20 are improved. Wherein, high water material elasticity is filled the bag and can be kept certain intensity, along with sinking of roof 21, roof 21 is to the decurrent pressure increase of high water material elasticity filling bag, and high water material elasticity filling bag can outwards be discharged water when receiving compression deformation to reduce the pressure of self, on the sealed basis is strutted to roof 21 in the realization, reduce the emergence of the too big damage condition of self pressure.
Specifically, in this embodiment, the overlapping regions of two adjacent high water material elastic filling bags can be hermetically connected by a sealing connector. The connection structure is a specific connection form of two adjacent high-water material elastic filling bags, the overlapping areas of the two high-water material elastic filling bags are connected through the sealing connector, the connection sealing performance and firmness of the two high-water material elastic filling bags can be further improved, the sealing performance of the first elastic sealing body 120 formed by the multiple high-water material elastic filling bags is further improved, and the situation that the sealing performance of the first elastic sealing body 120 is influenced by gaps generated between the high-water material elastic filling bags and the adjacent high-water material elastic filling bags in the sinking process of the top wall 21 is reduced.
In this embodiment, a limiting groove may be disposed at the top end of the wall 110, the limiting groove extends along the length direction of the wall 110, and the bottom ends of the plurality of high-water-content elastic filling bags are inserted into the limiting groove. The high-water material elastic filling bag is arranged at the top of the wall body 110 in a specific form, on one hand, the bottom end of the high-water material elastic filling bag is inserted into the limiting groove, and the limiting groove can limit the position of the high-water material elastic filling bag arranged on the wall body 110, so that the firmness of the high-water material elastic filling bag arranged on the wall body 110 is improved, the arrangement of the relative positions of the high-water material elastic filling bags is correspondingly ensured, and the sealing performance of the plugging between the wall body 110 and the top wall 21 is ensured; on the other hand, the limiting groove is a strip-shaped groove extending along the length direction of the wall body 110, the high-water-content elastic filling bag is connected with the wall body 110 through the insertion matching with the limiting groove, the connection sealing performance of the high-water-content elastic filling bag and the wall body 110 can be effectively improved, and therefore the sealing performance of the first elastic sealing body 120 for plugging between the wall body 110 and the top wall 21 is further improved.
In this embodiment, as shown in fig. 3, a support beam 200 may be provided in the gob-side entry retaining 20. The supporting beam 200 is located in the gob-side entry retaining 20 and supported between the top wall 21 and the bottom wall 22 of the gob-side entry retaining 20, so that the top wall 21 is supported, the sinking of the top wall 21 can be relieved to a certain extent, the pressure applied to the sealing wall 100 by sinking of the top wall 21 is reduced, the occurrence of the compression deformation and even the collapse of the sealing wall 100 is correspondingly further reduced, and the supporting and sealing effects of the sealing wall 100 on the gob-side entry retaining 20 are further ensured. Specifically, the support beam 200 is movably supported between the top wall 21 and the bottom wall 22, and when the support beam 200 is damaged or the support beam 200 needs to be removed, the support beam 200 can be removed, replaced, or the like.
In this embodiment, as shown in fig. 5, a plurality of communication holes 111 may be provided in a lower region of the wall 110, the communication holes 111 are arranged at intervals along an extending direction of the wall 110, and the communication holes 111 are used for injecting the flame-retardant polyurethane foaming agent into a lower region of a gap between the wall 110 and the crushing ledge 11; plugs are plugged in the communication holes 111. When constructing the sealing wall 100, the wall 110 may be constructed by bricks and cement on one side of the broken rib 11, the communication hole 111 is reserved in the lower region of the wall 110, then the flame-retardant polyurethane foaming agent may be injected into the gap between the wall 110 and the broken rib 11 through the communication hole 111, the lower region of the gap may be filled with the flame-retardant polyurethane foaming agent, the upper region of the gap may be injected with the flame-retardant polyurethane foaming agent through the opening at the top end of the gap between the wall 110 and the broken rib 11, and the flame-retardant polyurethane foaming agent in the upper region and the flame-retardant polyurethane foaming agent in the lower region may be mixed and solidified to form the sealing layer 130. The arrangement of the communication holes 111 can fill the gap between the wall 110 and the broken roadway side 11 with the flame-retardant polyurethane foaming agent from the upper part and the lower part respectively, so that the sufficiency of the gap filling with the flame-retardant polyurethane foaming agent is improved, the insufficient filling of the gap lower area caused by the fact that the flame-retardant polyurethane foaming agent is injected from the top only and is solidified in the downward flowing process is reduced, the blocking effect of the formed sealing layer 130 on the gap lower area is poor, and the occurrence of the situation of affecting the tightness of the sealing wall 100 is further reduced. After the flame-retardant polyurethane foaming agent is injected through the communication hole 111, the communication hole 111 is blocked by using a plug, and the first elastic sealing body 120 is squeezed between the top of the wall 110 and the top wall 21 of the gob-side entry retaining 20, so that the construction of the sealing wall is completed.
In this embodiment, as shown in fig. 3 and 4, a fixing boss 300 may be disposed on the bottom wall 22 of the gob-side entry 20, the fixing boss 300 extends along the length direction of the gob-side entry 20, the fixing boss 300, the bottom wall 22 and the wall 110 together define a fixing groove 310, and the second elastic sealing body 400 is mounted in the fixing groove 310. The second elastic sealing body 400 is squeezed into the fixing groove 310, the side wall of the second elastic sealing body is tightly abutted with the side wall of the wall 110, and the bottom wall 22 of the second elastic sealing body is tightly abutted with the bottom wall 22 of the fixing groove 310, so that the bottom of the wall 110 is sealed, the air leakage of a gap between the wall 110 and the bottom wall 22 of the gob-side entry retaining 20 is reduced, and the isolation sealing effect of the sealing wall 100 on the gob-side entry retaining 20 and the gob 10 is further improved; in addition, the fixing groove 310 can support and limit the bottom of the wall 110 through the second elastic sealing body 400, so as to offset the pushing force applied to the wall 110 by the crushing roadway wall 11 through the sealing layer 130, thereby improving the stability and firmness of the wall 110. Specifically, the second elastic sealing body 400 may be made of rubber, silicon gel, or the like.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The gob-side sealing structure for the gob-side entry retaining is characterized by comprising a gob-side entry retaining (20) and a sealing wall (100) located on the windbreak area side of the gob-side entry retaining (20), wherein the sealing wall (100) comprises a wall body (110) arranged on the bottom wall (22) of the gob-side entry retaining (20), and the wall body (110) extends along the length direction of the gob-side entry retaining (20); a first elastic sealing body (120) is arranged between the top of the wall body (110) and the top wall (21) of the gob-side entry retaining (20) in a clamped mode, and a gap between the first elastic sealing body (120) and the top wall (21) is filled with a polyurethane foaming agent.
2. Gob-side sealing structure according to claim 1, characterized in that a gap between the wall (110) and the crushing wall (11) of the gob-side entry (20) is filled with a sealing layer (130).
3. The gob-side entry retaining gob-side closing structure according to claim 2, wherein the material of the closing layer (130) is a flame-retardant polyurethane foaming agent.
4. The gob-side entry sealing structure according to claim 2 or 3, wherein one end of the first elastic sealing body (120) protrudes from the wall (110) and abuts against the crushing wall (11).
5. The gob-side entry sealing structure according to any one of claims 1 to 3, wherein the first elastic sealing body (120) includes a plurality of high-moisture-material elastic filling bags, the plurality of high-moisture-material elastic filling bags are arranged in this order in a longitudinal direction of the wall (110), and an overlapping region exists between two adjacent high-moisture-material elastic filling bags.
6. The gob-side entry retaining mining area side closing structure according to claim 5, wherein the overlapping areas of two adjacent high-water-material elastic filling bags are hermetically connected by a sealing connector.
7. The gob-side entry retaining gob-side closing structure according to claim 5, wherein a stopper groove is provided at a top end of the wall body (110), the stopper groove extends in a length direction of the wall body (110), and bottom ends of the plurality of high-water-material elastic filling bags are inserted into the stopper groove.
8. Gob-side closing structure according to any one of claims 1 to 3, characterized in that a support beam (200) is provided in the gob-side entry (20).
9. The gob-side entry retaining gob-side seal structure according to claim 3, wherein a plurality of communication holes (111) are provided in a lower region of the wall (110), the plurality of communication holes (111) are arranged at intervals in an extending direction of the wall (110), and the communication holes (111) are used for injecting the flame-retardant polyurethane foaming agent into a lower region of a gap between the wall (110) and the crushing wall (11); plugs are plugged in the communication holes (111).
10. The gob-side seal structure according to any one of claims 1 to 3, wherein a bottom wall (22) of the gob-side entry (20) is provided with a fixing boss (300), the fixing boss (300) extends in a length direction of the gob-side entry (20), the fixing boss (300), the bottom wall (22) and the wall (110) jointly define a fixing groove (310), and a second elastic sealing body (400) is installed in the fixing groove (310).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023054446.2U CN214464396U (en) | 2020-12-17 | 2020-12-17 | Gob-side entry retaining mining area side sealing structure |
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| CN202023054446.2U CN214464396U (en) | 2020-12-17 | 2020-12-17 | Gob-side entry retaining mining area side sealing structure |
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| CN214464396U true CN214464396U (en) | 2021-10-22 |
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| CN202023054446.2U Active CN214464396U (en) | 2020-12-17 | 2020-12-17 | Gob-side entry retaining mining area side sealing structure |
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