CN112664269B - Gob-side entry retaining goaf side sealing structure and side air leakage preventing method - Google Patents
Gob-side entry retaining goaf side sealing structure and side air leakage preventing method Download PDFInfo
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- CN112664269B CN112664269B CN202011497029.7A CN202011497029A CN112664269B CN 112664269 B CN112664269 B CN 112664269B CN 202011497029 A CN202011497029 A CN 202011497029A CN 112664269 B CN112664269 B CN 112664269B
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000004744 fabric Substances 0.000 claims abstract description 68
- 230000002265 prevention Effects 0.000 claims abstract description 6
- 238000004891 communication Methods 0.000 claims description 19
- 229920002635 polyurethane Polymers 0.000 claims description 15
- 239000004814 polyurethane Substances 0.000 claims description 15
- 239000004088 foaming agent Substances 0.000 claims description 14
- 230000009471 action Effects 0.000 claims description 8
- 230000004888 barrier function Effects 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 13
- 239000003245 coal Substances 0.000 abstract description 12
- 238000005065 mining Methods 0.000 abstract description 10
- 230000000903 blocking effect Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- 238000002955 isolation Methods 0.000 description 6
- 239000012528 membrane Substances 0.000 description 6
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- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 239000004604 Blowing Agent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
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Abstract
The invention provides a gob-side entry retaining goaf side airtight structure and an air leakage prevention method, and relates to the technical field of coal mining. The gob-side entry retaining goaf side airtight structure comprises a gob-side entry retaining, wherein a broken roadway side is arranged on one side of the gob-side entry retaining, an airtight device is arranged in the gob-side entry retaining, the airtight device comprises windproof cloth and a strip-shaped elastic sealing body, the windproof cloth is covered on the broken roadway side, and the elastic sealing body extends along the length direction of the broken roadway side; the elastic sealing body is clamped in a gap between the broken roadway side and the gob-side entry retaining top wall, and 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. The gob-side entry retaining goaf side airtight structure has good airtight effect on the gob-side entry retaining goaf side, has higher air tightness of the gob-side entry retaining goaf, and can realize better air return effect.
Description
Technical Field
The invention relates to the technical field of coal mining, in particular to a gob-side entry retaining goaf side sealing structure and an air leakage preventing method.
Background
The gob-side entry retaining means that after the upper section working face is mined, the original working face machine lane is reserved by reinforcing support or adopting other effective methods and is used as an air return lane when the lower section working face is mined, one side of the reserved lane is a goaf, and the other side of the reserved lane is a coal body, so that one lane can be utilized twice. According to the analysis of the existing continuous mining system without coal pillars, the gob-side entry retaining can improve the mine recovery rate by more than 10%, the roadway tunneling rate and the roadway maintenance cost can be reduced by about 30%, the gob-side entry retaining technology can greatly reduce the mine tunneling amount, relieve the mining succession tension, shorten the working face moving time and the like, and is a great innovation of the coal mining and recovery roadway support technology.
The key point of gob-side entry retaining is that a sealing device must be constructed on the goaf side, and most sealing device forms are applied at present, such as wood piles, dense struts, concrete blocks, filling walls and the like, but as a working face is extracted, the direct roof can gradually sink or deform, and the broken roadway sides can deform due to vibration, so that the sealing performance of the sealing device on the broken roadway sides is poor, and the air return effect of gob-side entry retaining is further affected.
Disclosure of Invention
The invention aims to provide a gob-side entry retaining goaf side sealing structure and an air leakage prevention method, so as to solve the technical problems that the sealing performance of a sealing device on broken roadway sides is poor and the gob-side entry retaining return air effect is affected.
In order to solve the problems, the invention provides a gob-side entry retaining goaf side airtight structure, which comprises a gob-side entry retaining, wherein a broken roadway side is arranged on one side of the gob-side entry retaining, an airtight device is arranged in the gob-side entry retaining, the airtight device comprises windproof cloth and a strip-shaped elastic sealing body, the windproof cloth is covered on the broken roadway side, and the elastic sealing body extends along the length direction of the broken roadway side;
the elastic sealing body is clamped in a gap between the broken 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 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.
Optionally, the elastic sealing body includes a plurality of gasbag strips, the gasbag strip includes bar connection membrane and a plurality of gasbag body, and is a plurality of the gasbag body is all located bar connection membrane, and follow bar connection membrane's length direction zero clearance is arranged.
Optionally, the gob entry goaf side airtight structure still includes a plurality of connecting pieces, prevent wind and laid a plurality of first connecting holes, the bar linking membrane is equipped with a plurality of second connecting holes, the bar linking membrane with prevent wind when cloth position corresponds, a plurality of the second connecting hole with prevent wind a plurality of in cloth corresponding region a plurality of first connecting hole one-to-one, the connecting piece passes corresponding first connecting hole and second connecting hole and right prevent wind cloth with the bar linking membrane is connected.
Optionally, a sealing layer formed by polyurethane foaming agent is filled between the windproof cloth and the broken roadway side.
Optionally, the windproof cloth is provided with a plurality of communication holes, and the communication holes are distributed on the windproof cloth in a scattered manner; the gob-side entry retaining goaf side airtight 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 communication hole and penetrates through the sealing layer to be inserted into the broken roadway side, and the limiting head is blocked outside the communication hole.
Optionally, the air bag strip is provided with a safety valve, and when the air pressure in the air bag strip is greater than the preset air pressure, the safety valve automatically deflates.
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 steps of (1) plugging an upper air bag strip in an uninflated state into a gap between a broken roadway side and a gob-side entry retaining top wall, enabling the upper air bag strip to extend along the length direction of the broken roadway side, and then inflating the upper air bag strip to enable the upper air bag strip to be clamped between the broken roadway side and the top wall;
the method comprises the steps of (1) plugging a lower airbag strip in an uninflated state into a gap between a broken roadway side and a gob-side entry retaining bottom wall, enabling the lower airbag strip to extend along the length direction of the broken roadway side, and then inflating the lower airbag strip to enable the lower airbag strip to be clamped between the broken 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, a windproof cloth is connected between the upper air bag strip and the lower air bag strip, and the windproof cloth is covered on the broken roadway side under the pulling action of the upper air bag strip and the lower air bag strip.
Optionally, injecting polyurethane foaming agent into the gap between the windproof cloth and the broken roadway side through the communication holes on the windproof cloth, and forming a sealing layer in the gap by the polyurethane foaming agent.
Optionally, the anchor rod is inserted into the broken roadway side after passing through the communication hole and the sealing layer.
Optionally, the step of 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 comprises the following steps:
the anchor rod passes 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 broken roadway side.
The gob-side entry retaining goaf side airtight structure comprises a gob-side entry retaining device for assisting coal mining, wherein an airtight device is arranged on one side of the gob-side entry retaining device facing the goaf to seal and isolate broken roadway sides of the gob-side entry retaining device, so that the gob-side entry retaining device can be used as a return air roadway, and the airtight device comprises windproof cloth for blocking broken roadway sides and elastic sealing bodies for sealing gaps between the broken roadway sides and top walls and bottom walls of the gob-side entry retaining device; firstly, the top and the bottom of the broken roadway side are irregular wall surfaces, an elastic sealing body clamped between the top wall of the gob-side entry retaining roadway and the top of the broken roadway side wall and between the bottom wall of the gob-side entry retaining roadway and the bottom of the broken roadway side wall can adapt to the corresponding deformation of the gap, so that the gap between the top and the bottom of the broken roadway side wall is well sealed, and windproof cloth is connected between the elastic sealing body at the top and the elastic sealing body at the bottom, the broken roadway side can be sealed, so that the sealing isolation of one side of a gob-side entry retaining goaf is realized, the air tightness of the gob-side entry retaining roadway is correspondingly improved, the air return effect of the gob-side entry retaining roadway is further improved, and the normal operation of coal mining is ensured; secondly, the roof can sink gradually under self gravity effect and other vibration effects, and broken lane group receives vibration and also can take place deformation, and broken lane group changes with the clearance of roof and with the clearance of diapire, and the elastic sealing body takes place deformation correspondingly, can keep the leakproofness to the clearance shutoff to ensure the isolation leakproofness of closing device to gob-side entry in a longer period, correspondingly can ensure the gas tightness of gob-side entry in a longer period, makes 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 that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic cross section view of a gob-side entry retaining goaf side closed structure provided by the invention;
FIG. 2 is an enlarged view of a portion of FIG. 1A;
FIG. 3 is a schematic front view of a sealing device in the gob-side entry retaining goaf side sealing structure, which is provided by the invention, fixed on a broken roadway side by an anchor rod;
FIG. 4 is a schematic view of the windbreak of FIG. 3;
fig. 5 is a schematic view of the upper bladder strip of fig. 3.
Reference numerals illustrate:
10-goaf; 20-gob-side entry retaining; 21-top wall; 22-a bottom wall; 30-direct topping; 40-basic roof; 50-coal body; 60-breaking roadway sides; 100-sealing device; 110-windproof cloth; 111-first connection holes; 112-a communication hole; 120-upper balloon strips; 130-lower balloon strips; 141-a strip-shaped connection film; 142-an air bag body; 143-a second connection hole; 144-a safety valve; 150-a sealing layer; 200-anchor rods; 210-a rod body; 220-a positioning head; 300-gasket.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The embodiment provides a gob-side entry retaining goaf side airtight structure, as shown in fig. 1, comprising a gob-side entry retaining 20, wherein a broken roadway side 60 is arranged on one side 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 roadway side 60, and the elastic sealing body extends along the length direction of the broken roadway side 60; part of the elastic sealing body is clamped in a gap between the broken roadway side 60 and the top wall 21 of the gob-side entry retaining roadway 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 broken roadway side 60 and the bottom wall 22 of the gob-side entry retaining roadway 20, and the elastic sealing body is connected with the bottom end of the windproof cloth 110.
The gob-side entry retaining goaf side airtight structure provided by the embodiment comprises a gob-side entry retaining 20 for assisting coal body 50 mining, wherein an airtight device 100 is arranged on one side of the gob-side entry retaining 20 facing the goaf 10 to seal and isolate broken roadway sides 60 of the gob-side entry retaining 20, so that the gob-side entry retaining 20 can be used as a return air roadway, and the airtight device 100 comprises a windproof cloth 110 for blocking the broken roadway sides 60 and an elastic sealing body for sealing gaps between the broken roadway sides 60 and top walls 21 and bottom walls 22 of the gob-side entry retaining 20; firstly, the top and the bottom of the broken roadway side 60 are irregular wall surfaces, an elastic sealing body clamped between the top wall 21 of the gob-side entry retaining roadway 20 and the top of the broken roadway side 60 and between the bottom wall 22 of the gob-side entry retaining roadway 20 and the bottom of the broken roadway side 60 can adapt to the corresponding deformation of the gap, so that the gap between the top and the bottom of the broken roadway side 60 is well sealed, the broken roadway side 60 can be plugged, sealing isolation of one side of a gob-side entry retaining roadway 20 goaf 10 is realized, the air tightness of the gob-side entry retaining roadway 20 is correspondingly improved, the air return effect of the gob-side entry retaining roadway 20 is further improved, and normal operation of coal mining is ensured; secondly, the roof 21 can sink gradually under the action of self gravity and other vibration, the broken roadway wall 60 can deform under the action of vibration, the gap between the broken roadway wall 60 and the roof 21 and the gap between the broken roadway wall 60 and the bottom wall 22 change, the elastic sealing body correspondingly deforms, and the sealing performance of gap blocking can be kept, so that the isolation sealing performance of the sealing device 100 on the gob-side entry retaining 20 is ensured in a long time, and the air tightness of the gob-side entry retaining 20 can be ensured in a long time correspondingly, so that the gob-side entry retaining device has a good air return effect.
In addition, the sealing device 100 is formed by connecting an elastic sealing body and the windproof cloth 110, and has the advantages of simple structure, small weight, low cost and convenience in transportation and installation of the sealing device 100. Of course, in the sealing device 100, an elastic sealing body may be provided only between the broken roadway 60 and the top wall 21 to seal the gap between the two; or, only the elastic sealing body is arranged between the broken roadway side 60 and the bottom wall 22 to seal the gap between the broken roadway side 60 and the bottom wall 22, so that the isolation sealing performance of the sealing device on the gob-side entry retaining 20 can be improved to a certain extent, and the air tightness of the gob-side entry retaining 20 is correspondingly ensured.
Specifically, as shown in fig. 1, the top of the gob-side entry retaining 20 is sequentially a direct top 30 and a basic top 40, wherein the bottom surface of the direct top 30 is the top wall 21 of the gob-side entry retaining 20; the side of the gob-side entry retaining 20 facing the goaf 10 is a broken roadway wall 60, and the side facing away from the goaf 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 along the length direction. Here, in a specific form of the elastic sealing body, specifically, the airbag strip located between the broken roadway 60 and the top wall 21 is set as an upper airbag strip 120, the airbag strip located between the broken roadway 60 and the bottom wall 22 is set as a lower airbag strip 130, and for constructing the sealing device 100 in the gob-side entry retaining roadway 20 to have the effect of air leakage prevention on the air collection area side thereof, the embodiment also provides an air leakage prevention method, which includes the following steps: the upper airbag strip 120 in the uninflated state is plugged into a gap between the broken roadway side 60 and the top wall 21 of the gob-side entry retaining roadway 20, the upper airbag strip 120 extends along the length direction of the broken roadway side 60, and then the upper airbag strip 120 is inflated to be clamped between the broken roadway side 60 and the top wall 21; the lower airbag strip 130 in the uninflated state is plugged into a gap between the broken roadway side 60 and the bottom wall 22 of the gob-side entry retaining roadway 20, the lower airbag strip 130 extends along the length direction of the broken roadway side 60, and then the lower airbag strip 130 is inflated to be clamped between the broken roadway side 60 and the bottom wall 22; the windproof cloth 110 is covered on the broken roadway side 60, 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 completed, the upper airbag strip 120 can seal and block the gap between the broken roadway side 60 and the top wall 21, the lower airbag strip 130 can seal and block the gap between the broken roadway side 60 and the bottom wall 22, and the windproof cloth 110 seals and blocks the broken roadway side 60 between the upper airbag strip 120 and the lower airbag strip 130, so that isolation and sealing of the goaf 10 side of the gob-side entry retaining 20 are realized; and the upper and lower airbag strips 120 and 130 can deform with the change of the corresponding gaps, so that effective blocking of the gaps can be ensured.
It should be noted that, when the windproof cloth 110, the upper airbag strip 120 and the lower airbag strip 130 are independently installed, the order of installation of the three is not limited; of course, in other embodiments, the windproof cloth 110 may be connected between the upper airbag strip 120 and the lower airbag strip 130, and after the upper airbag strip 120 and the lower airbag strip 130 are installed, the windproof cloth 110 may be covered on the breaking roadway 60 under the pulling action of the upper airbag strip 120 and the lower airbag 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 the individual airbag strips may be installed sequentially along the longitudinal direction of the broken roadway 60.
In this embodiment, the airbag strip may include a strip-shaped connection film 141 and a plurality of airbag bodies 142, where the plurality of airbag bodies 142 are disposed on the strip-shaped connection film 141 and are arranged without gaps along the length direction of the strip-shaped connection film 141. Here, the air bag strip is a specific form, wherein the strip-shaped connecting film 141 plays a limiting role on the plurality of air bag bodies 142, and the adjacent two air bag bodies 142 are arranged without gaps, so that the stability of the relative positions between the adjacent air bag bodies 142 and the connection air tightness between the adjacent air bag bodies 142 are improved, the sealing tightness of the air bag strip to the broken roadway 60 and the top wall 21 or the bottom wall 22 is correspondingly improved, the air tightness of the gob-side entry retaining 20 is further improved, and the air return effect is ensured. In addition, compared with the installation of a single air bag body 142, the strip-shaped connecting film 141 connects a plurality of air bag bodies 142 into a whole, the installation convenience is higher, and the strip-shaped connecting film 141 is connected with the windproof cloth 110, so that the damage to the tightness of the air bag body 142 caused by the direct connection of the air bag body 142 and the windproof cloth 110 can be effectively reduced on the basis of the connection of the air bag body 142 and the windproof cloth 110.
Specifically, in this embodiment, the space between adjacent balloon bodies 142 may be filled with a polyurethane foaming agent. The polyurethane foaming agent is used for blocking and connecting the gaps of the adjacent air bag bodies 142, so that the connection tightness of the adjacent air bag bodies 142 is effectively improved, and the tightness of the air bag strips to the gaps between the broken roadway edges 60 and the top wall 21 or the bottom wall 22 is correspondingly improved; in addition, as the top wall 21 sinks and the broken roadway wall 60 deforms, the gap between the broken roadway wall 60 and the top wall 21 or the bottom wall 22 changes, and the polyurethane foaming agent with certain elasticity can deform along with the gap, so that the gap is blocked correspondingly.
In this embodiment, as shown in fig. 1-5, the gob-side entry retaining goaf side sealing structure may further include a plurality of connecting members, the windbreaker 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, and when the strip-shaped connecting film 141 corresponds to the position of the windbreaker 110, the plurality of second connecting holes 143 correspond to the plurality of first connecting holes 111 in the corresponding region of the windbreaker 110 one by one, and the connecting members pass through the corresponding first connecting holes 111 and second connecting holes 143 to connect the windbreaker 110 and the strip-shaped connecting film 141. In this embodiment, the connection member may be an anchor bar 200, and the steps of connecting the top end of the windbreak 110 to the upper air bag strap 120 via the anchor bar 200, and connecting the bottom end of the windbreak 110 to the lower air bag strap 130 via the anchor bar 200 include: the anchor rod 200 passes 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 into the broken roadway wall 60; the limiting head 220 of the anchor rod 200 is blocked outside, 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 roadway side 60, and the broken roadway side 60 can fix and limit the strip-shaped connecting film 141 and the windproof cloth 110 by fixing the anchor rod 200, so that the firmness and the position stability of the installation of the air bag strips and the lining cloth on the broken roadway side 60 are improved, and the blocking stability of the sealing device 100 on the broken roadway side 60 is correspondingly improved.
In this embodiment, as shown in fig. 1 and 2, a sealing layer 150 formed by polyurethane foaming agent may be filled between the windguard 110 and the broken roadway 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 on the broken roadway side 60, on one hand, the sealing layer 150 can serve as a barrier layer to perform secondary barrier on the outer side of the windproof cloth 110, so that the barrier tightness of the sealing device 100 on the goaf 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 150 can also play a supporting and limiting role on the broken roadway side 60, so that the stability of the broken roadway side 60 is improved, and the damage to the windbreak 110 caused by downward sliding of broken stones of the broken roadway side 60 is reduced, thereby improving the stability of the sealing device 100. 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 windbreaker 110, and the plurality of communication holes 112 may be distributed in the windbreaker 110. On the one hand, when the windproof cloth 110 is covered on the broken roadway side 60, polyurethane foaming agent can be injected into the gap between the windproof cloth 110 and the broken roadway side 60 through the communication holes 112 on the windproof cloth 110, and the polyurethane foaming agent forms a sealing layer 150 in the gap, so that the convenience of injecting the polyurethane foaming agent into the inner side of the windproof cloth 110 is improved; on the other hand, the gob-side entry retaining goaf side airtight structure can further comprise 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, after polyurethane foaming agent is injected, the rod body 210 can penetrate through the communication hole 112 and is inserted into the broken roadway side 60 after penetrating through the sealing layer 150, the limiting head 220 is blocked outside the communication hole 112, so that the windproof cloth 110 is further fixed and limited, and the stability of the windproof cloth 110 covered on the broken roadway side 60 is correspondingly further improved. 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 windbreak 110. The sealing gasket 300 is sleeved on the rod body 210, the size of the sealing gasket 300 is larger than that of the second connecting hole 143 and the first connecting hole 111, after the anchor rod 200 is inserted into the broken roadway side 60, the sealing gasket 300 can seal gaps between the rod body 210 and the first connecting hole 111 and between the rod body and the second connecting hole 143, so that the air leakage condition 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 to the broken roadway side 60 is further improved.
In this embodiment, the safety valve 144 may be disposed on the air bag, and when the air pressure in the air bag is greater than the preset air pressure, the safety valve 144 automatically deflates. Specifically, as shown in fig. 5, each air bag body 142 is provided with a safety valve 144 (only one for example is provided in the figure), the air bag body 142 can maintain a certain strength, along with the sinking of the top wall 21 or the deformation of the broken roadway wall 60, when the gap between the broken roadway wall 60 and the top wall 21 and the bottom wall 22 becomes smaller, the pressure applied to the air bag body 142 increases, when the air pressure in the air bag body 142 is greater than the preset air pressure, the safety valve 144 on the air bag body 142 is automatically opened, and the air bag body 142 can be exhausted outwards through the safety valve 144 while being compressed and deformed so as to reduce the air pressure of the air bag body 142 until the preset air pressure is reached again in the air bag body 142, so that the air bag body 142 can be ensured to have a certain softness, can deform along with the gap to ensure the sealing performance of the gap, reduce the excessive tightening of the air bag body 142, unable to effectively seal the gap, and even the occurrence of the cracking condition. Specifically, the preset air pressure may be 1.8kPa.
Finally, it is further noted that relational terms such as first and second, and the like are 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. Moreover, 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 one … …" does not exclude the presence of other like 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 (7)
1. The gob-side entry retaining goaf side airtight structure is characterized by comprising a gob-side entry retaining (20), wherein a broken roadway side (60) is arranged on one side of a gob-side entry retaining (20) positioned on the goaf (10), an airtight device (100) is arranged in the gob-side entry retaining (20), the airtight device (100) comprises windproof cloth (110) and a strip-shaped elastic sealing body, the windproof cloth (110) is covered on the broken roadway side (60), and the elastic sealing body extends along the length direction of the broken roadway side (60);
the elastic sealing body comprises a plurality of air bag strips, each air bag strip comprises a strip-shaped connecting film (141) and a plurality of air bag bodies (142), the plurality of air bag bodies (142) are arranged on the strip-shaped connecting films (141) and are distributed in a gapless manner along the length direction of the strip-shaped connecting films (141), and the strip-shaped connecting films (141) are provided with a plurality of second connecting holes (143);
the gob-side entry retaining goaf side airtight structure further comprises a plurality of anchor rods (200), the windproof cloth (110) is provided with a plurality of first connecting holes (111), the airbag strips comprise an upper airbag strip (120) and a lower airbag strip (130), the airbag body (142) of the upper airbag strip (120) is clamped in a gap between the broken roadway side (60) and the roof (21) of the gob-side entry retaining (20), the airbag body (142) of the lower airbag strip (130) is clamped in a gap between the broken roadway side (60) and the bottom wall (22) of the gob-side entry retaining (20), and the anchor rods (200) penetrate through the first connecting holes (111) at corresponding positions of the upper airbag strip (120) or the lower airbag strip (130) and are spliced in the broken roadway side (60).
2. The gob-side entry retaining goaf side enclosed structure of claim 1, wherein a sealing layer (150) formed of a polyurethane foaming agent is filled between said weather barrier (110) and said broken roadway side (60).
3. The gob-side entry retaining goaf side closed structure according to claim 2, characterized in that said weather strip (110) is provided with a plurality of communication holes (112), and a plurality of said communication holes (112) are distributed in said weather strip (110);
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 communication hole (112) and is inserted into the broken roadway side (60) after penetrating through the sealing layer (150), and the limiting head (220) is blocked outside the communication hole (112).
4. The gob-side entry retaining goaf side enclosed structure of claim 1 wherein said airbag strip is provided with a safety valve (144), said safety valve (144) automatically deflating when the air pressure within said airbag strip is greater than a predetermined air pressure.
5. The air leakage prevention method is applied to the goaf (10) side of the gob-side entry retaining (20), and is characterized by comprising the following steps of:
the method comprises the steps of (1) plugging an upper airbag strip (120) in an uninflated state into a gap between a broken roadway side (60) and the top wall (21) of a gob-side entry retaining roadway (20), enabling the upper airbag strip (120) to extend along the length direction of the broken roadway side (60), and then inflating the upper airbag strip (120) to enable the upper airbag strip to be clamped between the broken roadway side (60) and the top wall (21);
the method comprises the steps of (1) plugging a lower airbag strip (130) in an uninflated state into a gap between a broken roadway side (60) and the bottom wall (22) of a gob-side entry retaining (20), enabling the lower airbag strip (130) to extend along the length direction of the broken roadway side (60), and then inflating the lower airbag strip (130) to enable the lower airbag strip to be clamped between the broken roadway side (60) and the bottom wall (22);
covering the windproof cloth (110) on the broken roadway (60), enabling an anchor rod (200) to pass through a second connecting hole (143) of the upper air bag strip (120) or the lower air bag strip (130) and a first connecting hole (111) of the corresponding position of the windproof cloth (110) and to be inserted into the broken roadway (60), so as to correspondingly connect the top end of the windproof cloth (110) with the upper air bag strip (120) and correspondingly connect the bottom end of the windproof cloth (110) with the lower air bag strip (130); or, a windproof cloth (110) is connected between the upper airbag strip (120) and the lower airbag strip (130), and the windproof cloth (110) is covered on the broken roadway side (60) under the pulling action of the upper airbag strip (120) and the lower airbag strip (130).
6. The method according to claim 5, wherein a polyurethane foaming agent is injected into a gap between the windguard (110) and the broken roadway (60) through a communication hole (112) in the windguard (110), and the polyurethane foaming agent forms a sealing layer (150) in the gap.
7. The method according to claim 6, wherein the anchor rod (200) is inserted into the broken roadway (60) after passing through the communication hole (112) and the sealing layer (150).
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| Application Number | Priority Date | Filing Date | Title |
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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 (5)
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201617611D0 (en) * | 2016-10-18 | 2016-11-30 | Secretary Of State For Defence The | Sealing system |
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2020
- 2020-12-17 CN CN202011497029.7A patent/CN112664269B/en active Active
Patent Citations (5)
| 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 |
| 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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