CN112664269A - Gob-side entry retaining mining area side sealing structure and side air leakage preventing method - Google Patents
Gob-side entry retaining mining area side sealing structure and side air leakage preventing method Download PDFInfo
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- CN112664269A CN112664269A CN202011497029.7A CN202011497029A CN112664269A CN 112664269 A CN112664269 A CN 112664269A CN 202011497029 A CN202011497029 A CN 202011497029A CN 112664269 A CN112664269 A CN 112664269A
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Abstract
The invention provides a gob-side entry retaining goaf area side sealing structure and an air leakage prevention method, and relates to the technical field of coal mining. The gob-side entry retaining mining area side sealing structure comprises a gob-side entry retaining, wherein one side, located in a goaf, of the gob-side entry retaining is a crushing lane side, a sealing device is arranged in the gob-side entry retaining and comprises windproof cloth and a strip-shaped elastic sealing body, a windproof cloth cover is arranged on the crushing lane side, and the elastic sealing body extends along the length direction of the crushing lane side; part of the elastic sealing body is clamped in a gap between the crushing roadway side and the gob-side entry retaining top wall, and the elastic sealing body is connected with the top end of the windproof cloth; the other part of the elastic sealing body is clamped in a gap between the broken roadway side and the gob-side entry retaining bottom wall, and the elastic sealing body is connected with the bottom end of the windproof cloth. This gob entry mining area side enclosed construction is airtight effectual to gob entry mining area side, and the gas tightness of gob entry is higher, can realize better return air effect.
Description
Technical Field
The invention relates to the technical field of coal mining, in particular to a gob-side entry retaining goaf area side sealing structure and an air leakage prevention method.
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 sealing device must be built on the goaf side, the prior sealing devices are mainly applied in the forms of wood piles, dense pillars, concrete blocks, filling walls and the like, but the direct roof gradually sinks or deforms along with the extraction of a working face, and the broken entry side also deforms under the action of vibration, so that the sealing performance of the sealing device on the broken entry side is poor, and the air return effect of the gob-side entry retaining is further influenced.
Disclosure of Invention
The invention aims to provide a gob-side entry retaining mining area side sealing structure and an air leakage prevention method, and aims to solve the technical problems that the sealing performance of a sealing device on a broken roadway side is poor, and the air return effect of a gob-side entry retaining is influenced.
In order to solve the problems, the invention provides a gob-side entry retaining side sealing structure which comprises a gob-side entry retaining, wherein one side, located on a gob, of the gob-side entry retaining is a broken lane side, a sealing device is arranged in the gob-side entry retaining, the sealing device comprises a windproof cloth and a strip-shaped elastic sealing body, the windproof cloth is covered on the broken lane side, and the elastic sealing body extends along the length direction of the broken lane side;
the elastic sealing body is clamped in a gap between the crushing roadway side and the gob-side entry retaining top wall, and is connected with the top end of the windproof cloth; and/or the elastic sealing body is clamped in a gap between the crushing roadway side and the bottom wall of the gob-side entry retaining, and the elastic sealing body is connected with the bottom end of the windproof cloth.
Optionally, the elasticity seal includes a plurality of gasbag strips, the gasbag strip is including strip connection membrane and a plurality of gasbag body, and is a plurality of the gasbag body is all located the membrane is connected to the strip, and follows the length direction zero clearance of membrane is connected to the strip is arranged.
Optionally, the gob-side entry retaining goaf side sealing structure further includes a plurality of connecting pieces, the windproof cloth is provided with a plurality of first connecting holes, the strip-shaped connecting film is provided with a plurality of second connecting holes, when the strip-shaped connecting film corresponds to the windproof cloth in position, the plurality of second connecting holes correspond to the plurality of first connecting holes in the corresponding area of the windproof cloth one to one, and the connecting pieces pass through the corresponding first connecting holes and the second connecting holes to connect the windproof cloth and the strip-shaped connecting film.
Optionally, a sealing layer formed by a polyurethane foaming agent is filled between the windproof cloth and the crushing roadway side.
Optionally, the windproof cloth is provided with a plurality of communication holes, and the communication holes are dispersedly distributed on the windproof cloth; the gob-side entry retaining mining area side sealing structure further comprises an anchor rod, the anchor rod comprises a rod body and a limiting head arranged at one end of the rod body, the rod body penetrates through the communicating hole and penetrates through the sealing layer to be inserted into the broken roadway side, and the limiting head is blocked outside the communicating hole.
Optionally, the airbag strip is provided with a safety valve, which automatically deflates when the air pressure inside the airbag strip is greater than a preset air pressure.
The invention also provides an air leakage prevention method, which is applied to the goaf side of the gob-side entry retaining and comprises the following steps:
the method comprises the following steps of stuffing an upper air bag strip in an uninflated state into a gap between a crushing roadway side and the top wall of the gob-side entry retaining, extending the upper air bag strip along the length direction of the crushing roadway side, and then inflating the upper air bag strip to enable the upper air bag strip to be clamped between the crushing roadway side and the top wall;
the method comprises the following steps of stuffing a lower air bag strip in an uninflated state into a gap between a crushing roadway side and a gob-side entry retaining bottom wall, extending the lower air bag strip along the length direction of the crushing roadway side, and then inflating the lower air bag strip to enable the lower air bag strip to be clamped between the crushing roadway side and the bottom wall;
covering the windproof cloth on the broken roadway side, correspondingly connecting the top end of the windproof cloth with the upper air bag strip, and correspondingly connecting the bottom end of the windproof cloth with the lower air bag strip; or the windproof cloth is connected between the upper air bag strip and the lower air bag strip and is covered on the crushing roadway side under the pulling action of the upper air bag strip and the lower air bag strip.
Optionally, a polyurethane foaming agent is injected into a gap between the windproof cloth and the broken roadway side through a communication hole in the windproof cloth, and the polyurethane foaming agent forms a sealing layer in the gap.
Optionally, the anchor rod penetrates through the communication hole and the sealing layer and then is inserted into the broken roadway side.
Optionally, the top end of the windproof cloth is correspondingly connected with the upper air bag strip, and the step of correspondingly connecting the bottom end of the windproof cloth with the lower air bag strip includes:
and an anchor rod is used for penetrating through the first connecting hole of the upper air bag strip or the lower air bag strip and the second connecting hole at the corresponding position of the windproof cloth and is inserted into the crushing roadway side.
The invention provides a gob-side entry retaining side sealing structure which comprises a gob-side entry retaining for assisting coal mining, wherein a sealing device is arranged on one side of the gob-side entry retaining, which faces a goaf, so as to seal and isolate broken lane walls of the gob-side entry retaining, so that the gob-side entry retaining can be used as a return airway, wherein the sealing device comprises a windproof cloth for blocking the broken lane walls and an elastic sealing body for sealing gaps between the broken lane walls and the top wall and the bottom wall of the gob-side entry retaining; firstly, the top and the bottom of a broken roadway side are both irregular wall surfaces, elastic sealing bodies clamped in a gap between the top wall of a gob-side entry and the top of the broken roadway side and a gap between the bottom wall of the gob-side entry and the bottom of the broken roadway side can adapt to gaps to deform correspondingly, so that the gaps between the top and the bottom of the broken roadway side are sealed well, and a windproof cloth is connected between the elastic sealing body at the top and the elastic sealing body at the bottom to block the broken roadway side, so that the sealing isolation of one side of a gob-side entry gob is realized, the air tightness of the gob-side entry is correspondingly improved, the air return effect of the gob-side entry is further improved, and the normal operation of coal mining is ensured; secondly, the roof can sink gradually under self action of gravity and other vibration effects, broken lane group receives the vibration and also can take place deformation, broken lane group changes with the clearance of roof and with the clearance of diapire, the corresponding deformation that takes place of elastic sealing body can keep the leakproofness to the clearance shutoff to ensure the isolated leakproofness of closing device to the gob entry in the longer time, the corresponding gas tightness that can ensure the gob entry in the longer time, make it have better return air effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
fig. 3 is a schematic front view of a sealing device fixed to a broken roadway side through an anchor rod in a gob-side entry retaining mining area side sealing structure provided by the invention;
FIG. 4 is a schematic view of the windguard of FIG. 3;
FIG. 5 is a schematic view of the upper bladder strip of FIG. 3.
Description of reference numerals:
10-a goaf; 20-gob-side entry retaining; 21-a top wall; 22-a bottom wall; 30-immediate ejection; 40-a primary roof; 50-coal body; 60-crushing lane walls; 100-a closed device; 110-a windbreak cloth; 111-a first connection aperture; 112-communication hole; 120-upper air bag strip; 130-lower air bag strip; 141-strip-shaped connecting films; 142-a balloon body; 143-second connection hole; 144-a safety valve; 150-a sealing layer; 200-anchor rod; 210-a rod body; 220-a limiting head; 300-sealing gasket.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention 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 side sealing structure, as shown in fig. 1, the gob-side entry retaining side sealing structure comprises a gob-side entry retaining 20, a broken lane side 60 is arranged on one side, located in a gob 10, of the gob-side entry retaining 20, a sealing device 100 is arranged in the gob-side entry retaining 20, the sealing device 100 comprises a windproof cloth 110 and a strip-shaped elastic sealing body, the windproof cloth 110 is covered on the broken lane side 60, and the elastic sealing body extends along the length direction of the broken lane side 60; part of the elastic sealing body is clamped in a gap between the crushing roadway side 60 and the top wall 21 of the gob-side entry retaining 20, and the elastic sealing body is connected with the top end of the windproof cloth 110; the other part of the elastic sealing body is clamped in the gap between the crushing roadway side 60 and the bottom wall 22 of the gob-side entry retaining 20, and the elastic sealing body is connected with the bottom end of the windproof cloth 110.
The gob-side entry retaining side sealing structure provided by the embodiment comprises a gob-side entry retaining 20 for assisting in mining a coal body 50, wherein a sealing device 100 is arranged on one side of the gob-side entry retaining 20 facing a gob 10 to block and isolate a broken lane side 60 of the gob-side entry retaining 20, so that the gob-side entry retaining 20 can be used as a return airway, wherein the sealing device 100 comprises a windproof cloth 110 for blocking the broken lane side 60 and an elastic sealing body for blocking a gap between the broken lane side 60 and a top wall 21 and a bottom wall 22 of the gob-side entry retaining 20; firstly, the top and the bottom of a broken roadway side 60 are both irregular wall surfaces, elastic sealing bodies clamped in a gap between the top wall 21 of a gob-side entry retaining 20 and the top of the broken roadway side 60 and a gap between the bottom wall 22 of the gob-side entry retaining 20 and the bottom of the broken roadway side 60 can adapt to the gap to deform correspondingly, so that the gap between the top and the bottom of the broken roadway side 60 can be sealed well, and a windproof cloth 110 is connected between the elastic sealing body at the top and the elastic sealing body at the bottom and can be used for plugging the broken roadway side 60, so that the sealing isolation of one side of a goaf 10 of the gob-side entry retaining 20 is realized, the air tightness of the gob-side entry retaining 20 is correspondingly improved, the air return effect of the gob-side entry retaining 20 is improved, and the normal operation; secondly, roof 21 can sink gradually under the action of self gravity and other vibration effects, broken lane group 60 also can take place the deformation by the vibration, broken lane group 60 changes with the clearance of roof 21 and with the clearance of diapire 22, the corresponding deformation that takes place of elastic sealing body can keep the leakproofness to the clearance shutoff to ensure the isolated leakproofness of closing device 100 to gob entry 20 in a longer time, the corresponding gas tightness that can ensure gob entry 20 in a longer time, make it have better return air effect.
In addition, the sealing device 100 is formed by connecting an elastic sealing body and the windproof cloth 110, the structure is simple, the weight is light, the cost is low, and the transportation and the installation of the sealing device 100 are both convenient and fast. Of course, in the sealing device 100, an elastic sealing body may be provided only between the crushing roadway side 60 and the ceiling wall 21 to close the gap therebetween; alternatively, the isolation and sealing performance of the sealing device for the gob-side entry retaining 20 can be improved to some extent by providing the elastic sealing body only between the crushing lane 60 and the bottom wall 22 to close the gap therebetween, and the airtightness of the gob-side entry retaining 20 can be ensured accordingly.
Specifically, as shown in fig. 1, the top of the gob-side entry retaining 20 is an immediate roof 30 and a basic roof 40 in sequence, wherein the bottom surface of the immediate roof 30 is the top wall 21 of the gob-side entry retaining 20; the side of the gob-side entry retaining 20 facing the gob 10 is a broken roadway side 60, and the side facing away from the gob 10 is a coal body 50.
In this embodiment, the elastic sealing body may include a plurality of airbag strips, and the plurality of airbag strips are sequentially connected in the length direction. Here, a specific form of the elastic sealing body, specifically, the upper air bag strip 120 is set as the air bag strip located between the crushing roadway wall 60 and the top wall 21, and the lower air bag strip 130 is set as the air bag strip located between the crushing roadway wall 60 and the bottom wall 22, for building the sealing device 100 in the gob-side entry retaining roadway 20 to have an effect of preventing wind leakage to the wind-taking area side thereof, the embodiment further provides a method for preventing wind leakage, including the following steps: plugging the upper air bag strip 120 in an uninflated state into a gap between the crushing lane wall 60 and the top wall 21 of the gob-side entry retaining 20, extending the upper air bag strip 120 along the length direction of the crushing lane wall 60, and then inflating the upper air bag strip 120 to clamp the upper air bag strip between the crushing lane wall 60 and the top wall 21; plugging the lower air bag strip 130 in an uninflated state into a gap between the crushing lane side 60 and the bottom wall 22 of the gob-side entry retaining 20, extending the lower air bag strip 130 along the length direction of the crushing lane side 60, and then inflating the lower air bag strip 130 to clamp the lower air bag strip between the crushing lane side 60 and the bottom wall 22; the breaking roadway side 60 is covered with the windproof cloth 110, the top end of the windproof cloth 110 is correspondingly connected with the upper air bag strip 120, and the bottom end of the windproof cloth 110 is correspondingly connected with the lower air bag strip 130. After the installation is finished, the upper air bag strip 120 can seal and plug a gap between the broken roadway side 60 and the top wall 21, the lower air bag strip 130 can seal and plug a gap between the broken roadway side 60 and the bottom wall 22, and the windproof cloth 110 seals and plugs the broken roadway side 60 between the upper air bag strip 120 and the lower air bag strip 130, so that the isolation and sealing of the gob 10 side of the gob-side entry retaining 20 are realized; and the upper air bag strip 120 and the lower air bag strip 130 can deform along with the change of the corresponding gap, so that the gap can be effectively blocked.
It should be noted that, when the wind-proof cloth 110, the upper air bag strip 120 and the lower air bag strip 130 are independently installed, the installation sequence of the three is not limited; of course, in other embodiments, the windproof cloth 110 may be connected between the upper air bag strip 120 and the lower air bag strip 130, and after the upper air bag strip 120 and the lower air bag strip 130 are installed, the windproof cloth 110 may be covered on the crushing lane side 60 under the pulling action of the upper air bag strip 120 and the lower air bag strip 130; in addition, a plurality of airbag strips may be connected to form a long elastic sealing body, and then the elastic sealing body may be installed, or a single airbag strip may be sequentially installed along the length direction of the crushing lane side 60.
In this embodiment, the airbag strip may include a strip-shaped connection film 141 and a plurality of airbag bodies 142, and the plurality of airbag bodies 142 are all disposed on the strip-shaped connection film 141 and arranged without a gap along the length direction of the strip-shaped connection film 141. The air bag strip is a specific form of the air bag strip, wherein the strip-shaped connecting film 141 plays a role in limiting the plurality of air bag bodies 142, and two adjacent air bag bodies 142 are arranged without gaps, so that the stability of the relative positions between the adjacent air bag bodies 142 is improved, the connection airtightness between the adjacent air bag bodies 142 is improved, the sealing performance of the air bag strip for sealing between the crushing roadway side 60 and the top wall 21 or the bottom wall 22 is correspondingly improved, the airtightness of the gob-side entry retaining 20 is improved, and the air return effect of the gob-side entry retaining 20 is ensured. In addition, compare the installation of single gasbag body 142, the bar is connected membrane 141 and is connected a plurality of gasbag bodies 142 as a whole, and the installation is convenient the degree higher, and the bar is connected membrane 141 and is connected with windproof cloth 110, on the basis that realizes that gasbag body 142 and windproof cloth 110 are connected, can effectively reduce gasbag body 142 and directly be connected the destruction that causes gasbag body 142 leakproofness with windproof cloth 110.
Specifically, in the present embodiment, a polyurethane foaming agent may be filled between the adjacent air cells 142. The polyurethane foaming agent is used for plugging and connecting gaps between the adjacent air bag bodies 142, so that the connection sealing performance of the adjacent air bag bodies 142 is effectively improved, and the sealing performance of the air bag strip on the gap between the crushing roadway side 60 and the top wall 21 or the bottom wall 22 is correspondingly improved; in addition, as the top wall 21 sinks and the crushing lane walls 60 deform, the gap between the crushing lane walls 60 and the top wall 21 or the bottom wall 22 changes, and the polyurethane foaming agent having a certain elasticity can deform accordingly, thereby ensuring the blockage of the gap accordingly.
In this embodiment, as shown in fig. 1 to 5, the gob-side entry retaining gob-side sealing structure may further include a plurality of connecting members, the windbreak 110 is provided with a plurality of first connecting holes 111, the strip-shaped connecting film 141 is provided with a plurality of second connecting holes 143, when the strip-shaped connecting film 141 corresponds to the windbreak 110 in position, the plurality of second connecting holes 143 correspond to the plurality of first connecting holes 111 in the corresponding region of the windbreak 110 one-to-one, and the connecting members pass through the corresponding first connecting holes 111 and second connecting holes 143 to connect the windbreak 110 and the strip-shaped connecting film 141. Here, a specific form of the airbag body 142 connected to the wind cloth 110, and specifically, the connection member may be an anchor 200, and the steps of connecting the top end of the wind cloth 110 to the upper airbag strip 120 through the anchor 200, and connecting the bottom end of the wind cloth 110 to the lower airbag strip 130 through the anchor 200 include: the anchor 200 is inserted through the first connection hole 111 of the upper or lower airbag strip 120 or 130 and the second connection hole 143 of the corresponding position of the wind-proof cloth 110 and is connected to the crushing highwall 60; the limiting head 220 of the anchor rod 200 is blocked at the outer side, the rod body 210 of the anchor rod 200 is inserted into the broken roadway side 60, and the strip-shaped connecting film 141 and the windproof cloth 110 are clamped between the limiting head 220 and the broken roadway side 60, so that the connection between the strip-shaped connecting film 141 and the windproof cloth 110 is realized; in addition, the rod body 210 is inserted into the broken lane rib 60, and the broken lane rib 60 can realize the fixation and the limitation of the strip-shaped connecting film 141 and the windproof cloth 110 through the fixation of the anchor rod 200, so that the firmness and the position stability of the airbag strip and the lining cloth installed on the broken lane rib 60 are improved, and the plugging stability of the sealing device 100 on the broken lane rib 60 is correspondingly improved.
In this embodiment, as shown in fig. 1 and 2, a sealing layer 150 formed of a polyurethane foaming agent may be filled between the wind-guard sheet 110 and the breaker rib 60. The sealing layer 150 can fill the gap between the windproof cloth 110 and the broken roadway side 60 and can fix the windproof cloth 110 to the broken roadway side 60, on one hand, the sealing layer 150 can be used as a barrier layer to perform secondary barrier on the outer side of the windproof cloth 110, so that the barrier sealing performance of the sealing device 100 on the goaf 10 and the gob-side entry 20 is further improved, the air tightness of the gob-side entry 20 is correspondingly further improved, and the air return effect of the gob-side entry 20 on a coal mining area is ensured; on the other hand, the sealing layer 150 can also play a role in supporting and limiting the broken roadway sides 60, so that the stability of the broken roadway sides 60 is improved, the damage to the windproof cloth 110 caused by the downward sliding of the broken stones of the broken roadway sides 60 is reduced, and the stability of the sealing device 100 is improved. Preferably, the polyurethane blowing agent may be flame retardant.
Specifically, in the present embodiment, as shown in fig. 4, a plurality of communication holes 112 may be provided in the wind-guard sheet 110, and the plurality of communication holes 112 may be dispersedly arranged in the wind-guard sheet 110. On the other hand, when the wind-proof cloth 110 is covered on the broken lane rib 60, the polyurethane foaming agent can be injected into the gap between the wind-proof cloth 110 and the broken lane rib 60 through the communication hole 112 on the wind-proof cloth 110, and the polyurethane foaming agent forms the sealing layer 150 in the gap, thereby improving the convenience of injecting the polyurethane foaming agent into the wind-proof cloth 110; on the other hand, gob-side entry stope side enclosed construction can also include stock 200, and stock 200 includes the body of rod 210 and locates the spacing head 220 of body of rod 210 one end, and after the completion of polyurethane foaming agent injection, can pass the body of rod 210 intercommunicating pore 112, and insert in broken lane group 60 after penetrating sealing layer 150, spacing head 220 separates and keeps off in the intercommunicating pore 112 outside to further fix spacing to wind-proof cloth 110, correspondingly further improve wind-proof cloth 110 and cover the stability of locating broken lane group 60. Specifically, the second connection hole 143 and the communication hole 112 may be the same hole body.
In this embodiment, as shown in fig. 3, a gasket 300 may be interposed between the stopper 220 and the wind-proof cloth 110. The sealing gasket 300 is sleeved on the rod body 210, the size of the sealing gasket 300 is larger than the second connecting hole 143 and the first connecting hole 111, after the anchor rod 200 is inserted into the broken roadway wall 60, the sealing gasket 300 can seal the gap between the rod body 210 and the first connecting hole 111 and the second connecting hole 143, so that the occurrence of the air leakage situation of the windproof cloth 110 from the second connecting hole 143 is reduced, the air tightness of the windproof cloth 110 is improved, and the sealing performance of the sealing device 100 for sealing the broken roadway wall 60 is further improved.
In this embodiment, a safety valve 144 may be disposed on the airbag strip, and when the air pressure in the airbag strip is greater than a preset air pressure, the safety valve 144 automatically releases air. Specifically, as shown in fig. 5, each airbag body 142 is provided with a safety valve 144 (only one is provided for an example in the figure), a certain strength can be maintained in the airbag body 142, along with the sinking of the top wall 21 or the deformation of the crushing roadway rib 60, when the gap between the crushing roadway rib 60 and the top wall 21 and the bottom wall 22 becomes smaller, the pressure received by the airbag body 142 increases, when the air pressure in the airbag body 142 is greater than the preset air pressure, the safety valve 144 on the airbag body 142 automatically opens, the airbag body 142 can be outwardly exhausted through the safety valve 144 while being compressed and deformed, so as to reduce the air pressure of the airbag body itself, until the preset air pressure is reached again in the airbag body 142, so that the airbag body 142 can be ensured to have a certain softness, can deform along with the gap, so as to ensure the sealing performance of the gap, and reduce the occurrence of the situation that the airbag body 142 is too tight, and cannot. Specifically, the preset air pressure may be 1.8 kPa.
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 entry retaining mining area side sealing structure is characterized by comprising a gob-side entry retaining (20), wherein a broken lane side (60) is arranged on one side, located on a gob (10), of the gob-side entry retaining (20), a sealing device (100) is arranged in the gob-side entry retaining (20), the sealing device (100) comprises a windproof cloth (110) and a strip-shaped elastic sealing body, the windproof cloth (110) is covered on the broken lane side (60), and the elastic sealing body extends along the length direction of the broken lane side (60);
the elastic sealing body is clamped in a gap between the crushing roadway side (60) and the top wall (21) of the gob-side entry retaining (20), and is connected with the top end of the windproof cloth (110); and/or the elastic sealing body is clamped in a gap between the crushing roadway side (60) and the bottom wall (22) of the gob-side entry retaining (20), and is connected with the bottom end of the windproof cloth (110).
2. The gob-side entry retaining gob-side closing structure according to claim 1, wherein the elastic sealing body includes a plurality of airbag strips, the airbag strips include a strip-shaped connecting film (141) and a plurality of airbag bodies (142), and the plurality of airbag bodies (142) are provided to the strip-shaped connecting film (141) and arranged without a gap along a length direction of the strip-shaped connecting film (141).
3. The gob-side closing structure according to claim 2, further comprising a plurality of connectors, wherein the gob-side closing structure is provided with a plurality of first connection holes (111) for the windshield (110), wherein the strip-shaped connection film (141) is provided with a plurality of second connection holes (143), wherein the plurality of second connection holes (143) correspond to the plurality of first connection holes (111) of the corresponding area of the windshield (110) one-to-one when the strip-shaped connection film (141) corresponds in position to the windshield (110), and wherein the connectors connect the windshield (110) and the strip-shaped connection film (141) through the corresponding first connection holes (111) and second connection holes (143).
4. The gob-side entry sealing structure according to any one of claims 1 to 3, wherein a sealing layer (150) formed of a polyurethane foaming agent is filled between the wind-guard cloth (110) and the crushing lane upper (60).
5. The gob-side entry stop mining area-side containment structure according to claim 4, wherein the windbreak cloth (110) is provided with a plurality of communication holes (112), the plurality of communication holes (112) being dispersedly arranged in the windbreak cloth (110);
the gob-side entry retaining goaf side sealing structure further comprises an anchor rod (200), wherein the anchor rod (200) comprises a rod body (210) and a limiting head (220) arranged at one end of the rod body (210), the rod body (210) penetrates through the communicating hole (112) and penetrates through the sealing layer (150) to be inserted into the broken roadway side (60), and the limiting head (220) is separated from the outside of the communicating hole (112).
6. The gob-side entry retaining gob-side closing structure according to claim 2 or 3, wherein the air bag strip is provided with a safety valve (144), and the safety valve (144) is automatically deflated when the air pressure in the air bag strip is greater than a preset air pressure.
7. An air leakage prevention method is applied to a goaf (10) side of a gob-side entry retaining (20), and is characterized by comprising the following steps:
plugging an upper air bag strip (120) in an uninflated state into a gap between the crushing roadway side (60) and the top wall (21) of the gob-side entry retaining (20), wherein the upper air bag strip (120) extends along the length direction of the crushing roadway side (60), and then inflating the upper air bag strip (120) to enable the upper air bag strip to be clamped between the crushing roadway side (60) and the top wall (21);
plugging a lower air bag strip (130) in an uninflated state into a gap between the crushing roadway side (60) and the bottom wall (22) of the gob-side entry retaining (20), wherein the lower air bag strip (130) extends along the length direction of the crushing roadway side (60), and then inflating the lower air bag strip (130) to clamp the lower air bag strip between the crushing roadway side (60) and the bottom wall (22);
covering the windproof cloth (110) on the broken roadway side (60), correspondingly connecting the top end of the windproof cloth (110) with the upper air bag strip (120), and correspondingly connecting the bottom end of the windproof cloth (110) with the lower air bag strip (130); or the windproof cloth (110) is connected between the upper air bag strip (120) and the lower air bag strip (130), and the windproof cloth (110) is covered on the crushing roadway side (60) under the pulling action of the upper air bag strip (120) and the lower air bag strip (130).
8. The method of preventing wind leakage according to claim 7, wherein a polyurethane foaming agent is injected into a gap between the wind-proof cloth (110) and the breaker rib (60) through the communication hole (112) in the wind-proof cloth (110), and the polyurethane foaming agent forms a sealing layer (150) in the gap.
9. The method for preventing wind leakage according to claim 8, wherein the anchor rod (200) is inserted into the crushing roadway wall (60) after passing through the communication hole (112) and the sealing layer (150).
10. The method for preventing wind leakage according to claim 7, wherein the step of connecting the top end of the wind-proof cloth (110) to the upper air bag strip (120) and the bottom end of the wind-proof cloth (110) to the lower air bag strip (130) comprises:
the anchor rod (200) is used to penetrate through the first connecting hole (111) of the upper air bag strip (120) or the lower air bag strip (130) and the second connecting hole (143) of the corresponding position of the windproof cloth (110) and is inserted and connected to the crushing roadway side (60).
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| CN202011497029.7A CN112664269B (en) | 2020-12-17 | 2020-12-17 | Gob-side entry retaining goaf side sealing structure and side air leakage preventing method |
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| CN202011497029.7A CN112664269B (en) | 2020-12-17 | 2020-12-17 | Gob-side entry retaining goaf side sealing structure and side air leakage preventing method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155262A (en) * | 2011-03-11 | 2011-08-17 | 中国矿业大学 | Method for filling gas near roadway of coal mine gob-side entry retaining |
| CN204283488U (en) * | 2014-11-13 | 2015-04-22 | 中国矿业大学 | A kind of constant-resistance allows presses gob side entry retaining filling air bag |
| CN205349416U (en) * | 2016-02-03 | 2016-06-29 | 山西古县老母坡煤业有限公司 | Simple and easy gob entry device of no wall body |
| CN105735995A (en) * | 2016-02-02 | 2016-07-06 | 山东科技大学 | Gob-side roadway retaining method based on roof cutting of soft roof plate |
| CN209539401U (en) * | 2018-12-12 | 2019-10-25 | 扬州中矿建筑新材料科技有限公司 | A kind of gob side entry retaining flexible filling bag |
| US20200208520A1 (en) * | 2016-10-18 | 2020-07-02 | The Secretary Of State For Defence | Sealing system |
-
2020
- 2020-12-17 CN CN202011497029.7A patent/CN112664269B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155262A (en) * | 2011-03-11 | 2011-08-17 | 中国矿业大学 | Method for filling gas near roadway of coal mine gob-side entry retaining |
| CN204283488U (en) * | 2014-11-13 | 2015-04-22 | 中国矿业大学 | A kind of constant-resistance allows presses gob side entry retaining filling air bag |
| CN105735995A (en) * | 2016-02-02 | 2016-07-06 | 山东科技大学 | Gob-side roadway retaining method based on roof cutting of soft roof plate |
| CN205349416U (en) * | 2016-02-03 | 2016-06-29 | 山西古县老母坡煤业有限公司 | Simple and easy gob entry device of no wall body |
| US20200208520A1 (en) * | 2016-10-18 | 2020-07-02 | The Secretary Of State For Defence | Sealing system |
| CN209539401U (en) * | 2018-12-12 | 2019-10-25 | 扬州中矿建筑新材料科技有限公司 | A kind of gob side entry retaining flexible filling bag |
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| CN112664269B (en) | 2024-01-30 |
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