A rapid sealing method for underground disaster areas

Abstract

The present invention belongs to the technical field of mine accident treatment, and particularly relates to a method for quickly sealing a disaster area underground, which is completed by cooperating with a device for quickly sealing a disaster area underground. The device includes a bottom plate, on which a main airbag capable of inflating and deflating is fixedly installed. A plurality of flat plates are detachably installed on the surface of the main airbag near its top. A plugging mechanism for connecting the main airbag to the inner wall of the gob-side entry retaining is installed on the surface of the flat plates. A filling mechanism for filling the gap between the main airbag and the inner wall of the gob-side entry retaining is also installed on the bottom plate. During the process of sealing the gob-side entry retaining by the present invention, the operator can operate on the spot without the aid of a ladder, realizing the quick sealing of the gob-side entry retaining; the auxiliary airbag of the present invention can fit more fully on the inner wall at the top surface, ensuring the sealing effect; the auxiliary airbag of the present invention can fit fully on the inner wall at the top surface, ensuring the sealing effect.

Description

Technical Field

[0001] The invention belongs to the technical field of mine accident treatment, and particularly relates to a method for quickly sealing a disaster area underground. Background Art

[0002] Gas leakage is one of the main disasters in coal mines. Gas leakage can easily lead to spontaneous combustion of coal, resulting in a large number of casualties and property losses. When gas leakage occurs in a coal mine, the gas in the goaf is extremely easy to leak into the gob-side entry under the action of negative pressure. At this time, it is necessary to quickly seal the gob-side entry. The currently commonly used roadway sealing methods are sealing walls, sealing doors, and sealing airbags. Among them, the construction processes of the sealing wall and the sealing door are cumbersome and the layout time is long, which cannot meet the requirements of rapid underground sealing.

[0003] The Chinese utility model patent with the publication number of CN213775455U discloses a flexible buffer and rapid sealing airbag for a disaster area underground in a coal mine, which includes a plurality of single airbags. The adjacent two single airbags are tightly connected through a limiting mechanism. The limiting mechanism includes two limiting belts, which are respectively arranged on both sides of the single airbag. The single airbags at the top of the roadway and on both sides at the bottom of the roadway are tightly connected to the inner wall of the roadway through anchor fittings. An air charging and discharging port is arranged on the single airbag. The single airbag and the adjacent single airbag are connected through an air vent valve. An air charging device is connected to one of the single airbags at the bottom of the roadway. The device connects a plurality of single airbags to seal the roadway, thereby achieving the purpose of isolating the disaster area.

[0004] Since the density of gas is small, the leaked gas will gather above the gob-side entry. Therefore, it is necessary to ensure that the airbag always fits the top surface of the gob-side entry. Although the above device connects the airbag to the inner wall of the gob-side entry through anchor fittings, due to the fact that the gob-side entry usually has a certain height, operators need to use a ladder to insert the anchor fittings into the top surface of the gob-side entry, and the operators need to constantly carry the ladder when fixing different anchor fittings. This method is obviously not conducive to rapid sealing. Since the top layer of the gob-side entry is uneven and relatively loose under the action of gravity during the excavation process, on the one hand, it is difficult for the airbag to fully seal the top surface of the gob-side entry. On the other hand, after the anchor fittings are inserted into the top layer, the airbag is easy to drive the anchor fittings to separate from the loose layer under the action of horizontal wind, resulting in the offset of the airbag and further causing gas leakage. Summary of the Invention

[0005] To solve the above technical problems, the present invention adopts the following technical solutions: A rapid sealing method for underground disaster areas, which is completed in cooperation with a rapid sealing device for underground disaster areas. The rapid sealing device for underground disaster areas includes a bottom plate, on which a main airbag that can be inflated and deflated is fixedly installed. A plurality of flat plates are detachably installed on the surface of the main airbag near its top, and a plugging mechanism for connecting the main airbag to the inner wall of the gob-side entry retaining is installed on the surface of the flat plates.

[0006] The plugging mechanism includes a guide sleeve fixedly installed on the surface of the flat plate. A lifting rod is movably connected inside the guide sleeve. A plug rod coinciding with its axis is fixedly installed on the top surface of the lifting rod. The plugging mechanism further includes a driving assembly for driving the lifting rod to lift and lower. The driving assembly includes a pull bead rope controlled manually.

[0007] A filling mechanism for filling the gap between the main airbag and the inner wall of the gob-side entry retaining is also installed on the bottom plate.

[0008] The rapid sealing method for underground disaster areas includes the following steps:

[0009] Step 1. Determine the position: Determine the position of the disaster, and move the bottom plate to the gob-side entry retaining near the position of the disaster.

[0010] Step 2. Inflate and seal: Inflate the main airbag until the outer surface of the main airbag fits against the inner wall of the gob-side entry retaining.

[0011] Step 3. Plug and fix: Control the plug rod to insert into the inner wall of the gob-side entry retaining through the driving assembly to fix the main airbag.

[0012] Step 4. Fill the gap: Fill the gap between the main airbag and the inner wall of the gob-side entry retaining through the filling mechanism.

[0013] As a preferred technical solution of the present invention, the lifting rod is in threaded cooperation with the guide sleeve, and a plurality of convex blocks are evenly arranged on the surface of the plug rod.

[0014] As a preferred technical solution of the present invention, the driving assembly includes a driven gear fixedly sleeved on the end of the lifting rod away from the plug rod. A connecting plate is fixedly installed on the outer wall of the guide sleeve. A rotating shaft parallel to the lifting rod is rotatably installed on the guide sleeve. A gear column meshing with the driven gear is fixedly installed at the bottom end of the rotating shaft.

[0015] As a preferred technical solution of the present invention, a first bevel gear is fixedly installed at the top end of the rotating shaft. A driving shaft perpendicular to the rotating shaft is rotatably installed on the outer wall of the guide sleeve. A second bevel gear meshing with the first bevel gear is fixedly sleeved on the driving shaft; A driven wheel cooperating with the pull bead rope is fixedly sleeved at the end of the driving shaft away from the guide sleeve.

[0016] As a preferred technical solution of the present invention, a support arm is fixedly installed on the outer wall of the guide sleeve. One end of the support arm is fixedly installed with an arc-shaped limiting plate. The virtual axis of the limiting plate coincides with the axis of the driven wheel, and the inner arc surface of the limiting plate is in contact with the pull bead rope.

[0017] As a preferred technical solution of the present invention, a number of elastic telescopic rods are evenly fixedly installed around the insertion rod on the top surface of the lifting rod. The top ends of the telescopic sections of the number of elastic telescopic rods are jointly fixedly installed with an annular plate. A number of receiving grooves are evenly formed on the inner circumferential surface of the annular plate along its circumferential direction. A sliding plate is slidably installed in the receiving groove along the radial direction of the annular plate, and a telescopic spring is fixedly connected between the sliding plate and the inner end surface of the receiving groove.

[0018] As a preferred technical solution of the present invention, the top surface of the insertion rod is a conical surface, and the end surface of the sliding plate located outside the receiving groove is an arc surface.

[0019] As a preferred technical solution of the present invention, the filling mechanism includes a number of elastic ropes. A horizontal groove penetrating the bottom plate is formed on the bottom plate. The number of elastic ropes penetrate the horizontal groove and are movably connected with the horizontal groove. At least one elastic rope is arranged between adjacent two flat plates; one end of each elastic rope is fixedly installed with a cylindrical block, and a sub-airbag capable of inflating and deflating is jointly fixedly installed between the cylindrical block and the other end of the elastic rope; a ring is rotatably installed on the cylindrical block, and a pull rope is fixedly installed on the ring.

[0020] As a preferred technical solution of the present invention, the main airbag is connected to the flat plate through a magic tape.

[0021] The present invention has at least the following beneficial effects: (1) During the process of sealing the gob-side entry retaining by the present invention, after the main airbag is inflated, only need to manually pull the pull bead rope to control the rotation of the driven wheel, so as to drive the insertion rod to quickly insert into the top surface of the gob-side entry retaining through the transmission of the drive shaft, the second bevel gear, the first bevel gear, the rotating shaft, the gear column, the driven gear and the lifting rod, which improves the speed of fixing the main airbag. The operator can operate standing in place without using a ladder, realizing the rapid sealing of the gob-side entry retaining.

[0022] (2) Before the insertion rod of the present invention inserts into the top surface of the gob-side entry retaining, the ore layer on the top surface of the gob-side entry retaining is pre-compressed by the annular plate and the sliding plate, and the part of the top surface of the gob-side entry retaining corresponding to the insertion rod is compacted. Then the insertion rod automatically pushes open the sliding plate and inserts into the compacted ore layer; since the connection between the ore layer and the insertion rod is more stable after being compacted, the insertion rod is not easily separated from the ore layer under the action of a horizontal force, so the main airbag is not easily displaced under the action of a horizontal wind force, ensuring the sealing effect of the main airbag.

[0023] (3) After the gob-side entry retaining is sealed by the main airbag in the present invention, the auxiliary airbag is inflated, and then the auxiliary airbag is stuffed into the vacancy at the top surface of the gob-side entry retaining by manually pulling the pull rope and the elastic rope, which further improves the sealing effect of the gob-side entry retaining; it should be noted that since the auxiliary airbag is stuffed into the vacancy at the top surface of the gob-side entry retaining horizontally in the inflated state, compared with relying on the expansion of the main airbag to seal the vacancy, the auxiliary airbag can fit more fully on the inner wall at the top surface, ensuring the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the drawings and embodiments.

[0025] Figure 1 It is a step diagram of the rapid sealing method for the underground disaster area of the present invention.

[0026] Figure 2 It is a front view of the rapid sealing device for the underground disaster area in the embodiment of the present invention (the inflated state of the main airbag and the auxiliary airbag).

[0027] Figure 3 is Figure 2 an enlarged schematic view of part A in

[0028] Figure 4 It is a rear view of the rapid sealing device for the underground disaster area in the embodiment of the present invention (the inflated state of the main airbag and the auxiliary airbag).

[0029] Figure 5 It is a partial structural side sectional view of the floor and the main airbag in the embodiment of the present invention.

[0030] Figure 6 It is a sectional view of the annular plate and the sliding plate in the embodiment of the present invention.

[0031] Figure 7 It is a top view of the annular plate and the sliding plate in the embodiment of the present invention.

[0032] Figure 8 It is a structural schematic diagram of the pull bead rope, the driven wheel and the limit plate in the embodiment of the present invention.

[0033] Figure 9 It is a structural schematic diagram of the main airbag in the embodiment of the present invention.

[0034] In the figure: 1, bottom plate; 101, horizontal groove; 2, main airbag; 3, flat plate; 4, plugging mechanism; 401, guide sleeve; 402, lifting rod; 403, plug rod; 404, pull bead rope; 405, convex block; 406, driven gear; 407, connecting plate; 408, rotating shaft; 409, gear column; 410, first bevel gear; 411, driving shaft; 412, second bevel gear; 413, driven wheel; 414, support arm; 415, limit plate; 416, elastic telescopic rod; 417, annular plate; 418, accommodating groove; 419, sliding plate; 420, telescopic spring; 5, filling mechanism; 501, elastic rope; 502, cylindrical block; 503, auxiliary airbag; 504, ring; 505, pull rope. Detailed implementation mode

[0035] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways defined and covered by the claims.

[0036] As Figure 2 、 Figure 3 、 Figure 5 and Figure 9 As shown in

[0037] As Figure 3 and Figure 8As shown in the figure, the plugging mechanism 4 includes a guide sleeve 401 fixedly installed on the surface of the flat plate 3. A lifting rod 402 is installed in the guide sleeve 401 by screw fit. A plug rod 403 coinciding with its axis is fixedly installed on the top surface of the lifting rod 402. A number of bumps 405 are evenly arranged on the surface of the plug rod 403, and the bumps 405 can increase the stability of the plug rod 403 after being inserted into the ore layer. The plugging mechanism 4 further includes a driving component for driving the lifting of the lifting rod 402. The driving component includes a pull bead rope 404 controlled manually and a driven gear 406 fixedly sleeved on one end of the lifting rod 402 away from the plug rod 403. A connecting plate 407 is fixedly installed on the outer wall of the guide sleeve 401. A rotating shaft 408 parallel to the lifting rod 402 is rotatably installed on the guide sleeve 401. A gear column 409 meshing with the driven gear 406 is fixedly installed at the bottom end of the rotating shaft 408. A first bevel gear 410 is fixedly installed at the top end of the rotating shaft 408. A driving shaft 411 perpendicular to the rotating shaft 408 is rotatably installed on the outer wall of the guide sleeve 401. A second bevel gear 412 meshing with the first bevel gear 410 is fixedly sleeved on the driving shaft 411. A driven wheel 413 cooperating with the pull bead rope 404 is fixedly sleeved on one end of the driving shaft 411 away from the guide sleeve 401. A support arm 414 is fixedly installed on the outer wall of the guide sleeve 401. An arc-shaped limiting plate 415 is fixedly installed at one end of the support arm 414. The virtual axis of the limiting plate 415 coincides with the axis of the driven wheel 413, and the inner arc surface of the limiting plate 415 is in contact with the pull bead rope 404. The pull bead rope 404 is limited by the limiting plate 415 to ensure that the pull bead rope 404 always cooperates with the driven wheel 413.

[0038] The bottom plate 1 matches the width of the gob-side entry retaining. The bottom plate 1 is horizontally placed on the ground of the gob-side entry retaining manually, and the flat plate 3 is installed on the surface of the main airbag 2. The main airbag 2 is inflated by an external inflating device. The flat plate 3 and the plugging mechanism 4 continuously approach the top of the gob-side entry retaining as the main airbag 2 expands. The shape of the main airbag 2 after inflation matches the inner wall of the gob-side entry retaining. After the inflation of the main airbag 2 is completed and sealed, then the single pull bead rope 404 is pulled manually. During the movement of the pull bead rope 404, the driven wheel 413 cooperating with it is driven to rotate. The driven wheel 413 drives the driving shaft 411 and the second bevel gear 412 to rotate. The second bevel gear 412 drives the first bevel gear 410, the rotating shaft 408 and the gear column 409 to rotate synchronously. During the rotation of the gear column 409, the driven gear 406 is driven to rotate. When the driven gear 406 rotates, the lifting rod 402 and the plug rod 403 are driven to rise in a rotating state, and the plug rod 403 is inserted into the top surface of the gob-side entry retaining. The faster the pull bead rope 404 is pulled manually, the faster the plug rod 403 rises. After a single plug rod 403 is inserted into the top surface of the gob-side entry retaining, another pull bead rope 404 is pulled until the corresponding plug rod 403 is inserted into the top surface of the gob-side entry retaining. The operator can control each pull bead rope 404 standing in place, so that each plug rod 403 is inserted into the top surface of the gob-side entry retaining, greatly improving the sealing speed of the gob-side entry retaining.

[0039] As Figure 3 , Figure 6 , Figure 7 and Figure 8 As shown, a plurality of elastic telescopic rods 416 are fixedly installed around the insertion rod 403 on the top surface of the lifting rod 402. The top ends of the telescopic sections of the plurality of elastic telescopic rods 416 are fixedly installed with an annular plate 417. The annular plate 417 is located above the insertion rod 403. A plurality of receiving grooves 418 are evenly formed on the inner circumferential surface of the annular plate 417 along its circumferential direction. A sliding plate 419 is slidably installed in the receiving groove 418 along the radial direction of the annular plate 417. A telescopic spring 420 is fixedly connected between the sliding plate 419 and the inner end surface of the receiving groove 418. The top surface of the insertion rod 403 is a conical surface, and the end surface of the sliding plate 419 located outside the receiving groove 418 is an arc surface.

[0040] During the process of the lifting rod 402 rising in a rotating state, the elastic telescopic rods 416, the annular plate 417, the sliding plate 419 and the telescopic spring 420 rise synchronously. The annular plate 417 and the sliding plate 419 come into contact with the ore layer on the top surface of the gob-side entry retaining first before the insertion rod 403. Since the ore layer on the top surface of the gob-side entry retaining is relatively loose under the action of gravity, the annular plate 417 and the sliding plate 419 will compact the ore layer during the process of rising in a rotating state until the annular plate 417 and the sliding plate 419 can no longer rise, and the reaction force on the top surface of the gob-side entry retaining compresses the elastic telescopic rods 416. During the continuous rising process of the insertion rod 403, its top surface fits with the end surface of the sliding plate 419 located outside the receiving groove 418 and pushes the sliding plate 419 to move horizontally. The sliding plate 419 enters the receiving groove 418, and the telescopic spring 420 is compressed. The insertion rod 403 continues to rise and inserts into the compacted top surface of the gob-side entry retaining. Since the position corresponding to the insertion rod 403 on the top surface of the gob-side entry retaining is compacted, the stability of the connection between the insertion rod 403 and the top surface of the gob-side entry retaining is improved.

[0041] As Figure 2 and Figure 4 As shown, a filling mechanism 5 for filling the gap between the main airbag 2 and the inner wall of the gob-side entry retaining is further installed on the bottom plate 1. The filling mechanism 5 includes a plurality of elastic ropes 501. The elastic ropes 501 bypass the main airbag 2. A horizontal groove 101 penetrating the bottom plate 1 is formed on the bottom plate 1. The plurality of elastic ropes 501 penetrate the horizontal groove 101 and are movably connected with the horizontal groove 101. At least one elastic rope 501 is arranged between adjacent two flat plates 3. One end of each elastic rope 501 is fixedly installed with a cylindrical block 502. A sub-airbag 503 that can be inflated and deflated is fixedly installed between the cylindrical block 502 and the other end of the elastic rope 501. A ring 504 is rotatably installed on the cylindrical block 502, and a pull rope 505 is fixedly installed on the ring 504.

[0042] During the inflation process of the main airbag 2, the elastic rope 501 is continuously stretched; after fixing the main airbag 2 to the inner wall of the gob-side entry retaining by the plugging mechanism 4, the auxiliary airbag 503 is inflated through an external inflation mechanism, and then the pull rope 505 is manually pulled. The pull rope 505 drives the elastic rope 501 to move through the circular ring 504 and the cylindrical block 502. The bottom of the elastic rope 501 is always located in the horizontal groove 101, and the top of the elastic rope 501 closely adheres to the top surface of the main airbag 2 and moves ( Figure 4 as shown by the solid arrow); when the elastic rope 501 drives the auxiliary airbag 503 to move to the vacant position on the top surface of the gob-side entry retaining, stop pulling the pull rope 505, and then pull the elastic rope 501 below the auxiliary airbag 503 upward ( Figure 4 as shown by the hollow arrow in the figure, the elastic rope 501 on the back part of the main airbag 2 descends), and the elastic rope 501 drives the auxiliary airbag 503 to rise until the auxiliary airbag 503 is inserted into the vacant position on the top surface of the gob-side entry retaining.

[0043] This embodiment also provides a method for quickly sealing the underground disaster area, which is completed in cooperation with the above-mentioned underground disaster area quick sealing device, and includes the following steps:

[0044] Step 1. Determine the position: Determine the position of the disaster, and move the bottom plate 1 to the gob-side entry retaining near the disaster position.

[0045] Step 2. Inflate and seal: Inflate the main airbag 2 through an external inflation device until the outer surface of the main airbag 2 fits the inner wall of the gob-side entry retaining, and then seal the main airbag 2.

[0046] Step 3. Plug and fix: Manually pull the pull bead rope 404 to control the insertion rod 403 to insert into the inner wall of the gob-side entry retaining, and fix the main airbag 2 through the insertion rod 403.

[0047] Step 4. Fill the gap: Inflate the auxiliary airbag 503 through an external inflation mechanism, then adjust the positions of the pull rope 505 and the elastic rope 501, and fill the gap between the main airbag 2 and the inner wall of the gob-side entry retaining through the auxiliary airbag 503.

[0048] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rapid sealing method for underground disaster areas, which is completed in cooperation with a rapid sealing device for underground disaster areas. The rapid sealing device for underground disaster areas includes a bottom plate, and a main airbag that can be inflated and deflated is fixedly installed on the bottom plate. It is characterized in that: A number of flat plates are detachably installed on the surface of the main airbag near its top, and a plugging mechanism for connecting the main airbag to the inner wall of the gob-side entry is installed on the surface of the flat plates; The plugging mechanism includes a guide sleeve fixedly installed on the surface of the flat plate. A lifting rod is movably connected inside the guide sleeve. A plug rod coinciding with its axis is fixedly installed on the top surface of the lifting rod. The plugging mechanism further includes a driving component for driving the lifting rod to lift and lower. The driving component includes a pull bead rope controlled manually; A filling mechanism for filling the gap between the main airbag and the inner wall of the gob-side entry is also installed on the bottom plate; The filling mechanism includes a number of elastic ropes. Horizontal grooves penetrating the bottom plate are formed on the bottom plate. The number of elastic ropes penetrate the horizontal grooves and are movably connected with the horizontal grooves. At least one elastic rope is arranged between adjacent two flat plates; One end of each elastic rope is fixedly installed with a cylindrical block. A secondary airbag capable of inflating and deflating is fixedly installed jointly between the cylindrical block and the other end of the elastic rope; A ring is rotatably installed on the cylindrical block, and a pull rope is fixedly installed on the ring; The rapid airtight method for underground disaster areas includes the following steps: Step 1. Determine the position: Determine the position of the disaster, and move the bottom plate to the gob-side entry near the position of the disaster; Step 2. Inflate and seal: Inflate the main airbag until the outer surface of the main airbag fits against the inner wall of the gob-side entry; Step 3. Plug and fix: Control the plug rod to insert into the inner wall of the gob-side entry through the driving component to fix the main airbag; Step 4. Fill the gap: Fill the gap between the main airbag and the inner wall of the gob-side entry through the filling mechanism.

2. The rapid sealing method for underground disaster areas according to claim 1, characterized in that: The lifting rod is in threaded fit with the guide sleeve, and a number of convex blocks are evenly arranged on the surface of the plug rod.

3. The rapid sealing method for underground disaster areas according to claim 1, characterized in that: The driving component includes a driven gear fixedly sleeved on the end of the lifting rod away from the plug rod. A connecting plate is fixedly installed on the outer wall of the guide sleeve. A rotating shaft parallel to the lifting rod is rotatably installed on the guide sleeve. A gear column meshing with the driven gear is fixedly installed at the bottom end of the rotating shaft.

4. The rapid sealing method for underground disaster areas according to claim 3, characterized in that: A first bevel gear is fixedly installed at the top end of the rotating shaft. A driving shaft perpendicular to the rotating shaft is rotatably installed on the outer wall of the guide sleeve. A second bevel gear meshing with the first bevel gear is fixedly sleeved on the driving shaft; A driven wheel cooperating with the pull bead rope is fixedly sleeved at the end of the driving shaft away from the guide sleeve.

5. The rapid sealing method for underground disaster areas according to claim 3, characterized in that: A support arm is fixedly installed on the outer wall of the guide sleeve. One end of the support arm is fixedly installed with an arc-shaped limiting plate. The virtual axis of the limiting plate coincides with the axis of the driven wheel, and the inner arc surface of the limiting plate is in fit with the pull bead rope.

6. The rapid sealing method for underground disaster areas according to claim 1, characterized in that: A number of elastic telescopic rods are evenly fixedly installed on the top surface of the lifting rod around the plug rod. The top ends of the telescopic sections of the number of elastic telescopic rods are jointly fixedly installed with an annular plate. A number of receiving grooves are evenly formed on the inner circumferential surface of the annular plate along its circumference. A sliding plate is slidably installed in the receiving groove along the radial direction of the annular plate. A telescopic spring is fixedly connected between the sliding plate and the inner end surface of the receiving groove.

7. The rapid sealing method for underground disaster areas according to claim 6, characterized in that: The top surface of the plug rod is a conical surface, and the end surface of the sliding plate located outside the receiving groove is an arc-shaped surface.

8. A method for quickly sealing an underground disaster area according to claim 1, characterized in that: The main airbag and the flat plate are connected by magic tape.

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