An automatic sealing method for goaf areas

Abstract

This invention discloses an automatic goaf sealing method. An automatic ignition device is installed within the goaf, comprising a battery and a connected conductive circuit. The conductive circuit includes an upper contact plate and a lower contact plate connected to the positive and negative terminals of the battery via wires. The upper contact plate is fixed to the goaf roof, and the lower contact plate is positioned directly below it. A metal pipe is connected to the wire connected to the lower contact plate. An automatic roadway sealing device is also provided, comprising a sealing door and a suspension device. The suspension rope of the suspension device passes through the metal pipe, and the section through which it passes is made of flammable material and coated with flammable material. When the goaf roof sinks to the point where the upper and lower contact plates contact, the conductive circuit is activated, the metal pipe heats up, ignites the flammable material, and burns the suspension rope. The sealing door automatically falls, sealing the roadway connected to the goaf. This method allows for timely sealing of the goaf, effectively preventing disasters and avoiding safety hazards, and eliminates the need for personnel patrols.

Description

Technical Field

[0001] This invention belongs to the field of mine safety and relates to an automatic sealing method for goaf areas. Background Technology

[0002] Goaf areas are abandoned spaces formed after the extraction of underground solid minerals, and they are a major hazard source for safe mining. After the ore body is mined, the roof of the goaf area inevitably subsides. When the subsidence develops to a certain extent, it will inevitably collapse, which may lead to accidents and seriously threaten the safe production of the mine.

[0003] Sealing off goaf areas is an important measure to isolate hazardous sources and prevent safety accidents. In theory, goaf areas should be sealed off once mining ends. However, due to the need for monitoring, drainage, and other hazard mitigation or monitoring purposes, it is difficult to completely seal off goaf areas at the end of mining.

[0004] The optimal time to close a goaf is before the roof has subsided significantly. However, in engineering practice, mines often find it difficult to grasp the timing of closure. As a result, two situations often arise: one is that the goaf is closed too late, after the roof has already undergone considerable displacement, creating significant safety hazards or even causing a safety accident; the other is the opposite, where the goaf is closed too early, preventing personnel from entering and exiting for observation, and even causing water to accumulate in the closed goaf, creating new safety hazards. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic goaf sealing method that can automatically seal roadways when the roof of the goaf sinks to its extreme position.

[0006] The present invention provides an automatic goaf sealing method, which includes an automatic ignition device installed in the goaf. The automatic ignition device includes a battery and a connected conductive circuit. The conductive circuit includes an upper contact plate and a lower contact plate connected to the positive and negative terminals of the battery respectively by wires. The upper contact plate is fixed to the top of the goaf, and the lower contact plate is located directly below the upper contact plate. A metal pipe is connected to the wire connected to the lower contact plate. An automatic roadway sealing device is also provided, which includes a sealing door and a suspension device. The suspension rope of the suspension device passes through the metal pipe, and the section through which it passes is made of flammable material and coated with flammable material. When the top of the goaf sinks to the point where the upper and lower contact plates contact each other, the conductive circuit is activated, the metal pipe is energized and heats up, igniting the flammable material and burning off the suspension rope. The sealing door then automatically falls to seal the roadway connecting the goaf.

[0007] When the above method is implemented, the storage battery includes multiple individual cells connected in series, and the positive and negative terminals of the series connection are respectively connected to a wire, one of which is connected to the upper contact plate.

[0008] When the above method is implemented, a metal rod is vertically welded to the center position of the upper side of the length direction of the metal tube, and the upper end of the metal rod is fixed to the center position of the lower surface of the lower contact plate.

[0009] When the above method is implemented, the length of the metal rod is adjustable.

[0010] When the above method is implemented, the upper end of the other wire connected to the battery is connected to the lower center position of the metal tube.

[0011] When the above method is implemented, the suspension device includes the suspension rope, the fixed pulley, and the support column. The suspension rope includes two steel wire ropes and a flammable section connecting them. The lower end of the longer steel wire rope is fixed to the upper center position of the closed door. The fixed pulley is fixed to the roof plate near the roadway in the goaf through the mounting seat. After the longer steel wire rope passes around the fixed pulley, it turns to horizontal. The end of the shorter steel wire rope is fixed to the support column. The lower end of the support column is fixed to the bottom surface of the goaf.

[0012] When the above method is implemented, the support column is connected to a horizontal bar, and the end of the horizontal bar is fixed to the middle of the metal bar by a clamp.

[0013] When the above method is implemented, the support column, horizontal bar, and clamp are all made of insulating material.

[0014] When implementing the above method, door frames are symmetrically installed on both sides of the closed door at the connecting roadway in the goaf, and the height of the door frames is greater than the height of the roadway.

[0015] This method organically combines mechanics and electricity, incorporating a linked automatic ignition and automatic sealing device. It transforms the passive goaf sealing method of existing technologies into an active sealing method, allowing for precise control of the optimal sealing time. When the goaf roof subsides to a preset critical value, the automatic ignition device burns the suspension rope of the automatic sealing device, causing the sealing door to fall rapidly and instantly, sealing the roadway connected to the goaf. In short, this method can seal the goaf at the optimal time, effectively preventing disasters and avoiding safety hazards. It requires no personnel patrols and effectively overcomes the aforementioned shortcomings of existing technologies. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the normal state according to an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the closed platform in this embodiment.

[0018] Figure 3 for Figure 1 Enlarged schematic diagram of part A in the diagram.

[0019] Figure 4for Figure 1 Enlarged schematic diagram of part B in the diagram. Detailed Implementation

[0020] The automatic goaf sealing method disclosed in this embodiment uses an automatic ignition device and an automatic roadway sealing device.

[0021] like Figure 1 As shown, the automatic ignition device includes a battery 1, an upper contact plate 2, a lower contact plate 3, a metal rod 4, a metal tube 5, a wire 6, and a wire 7.

[0022] Battery 1 can be composed of multiple battery cells connected in series. Figure 1 The middle section consists of two battery cells connected in series, which are then connected to wires 6 and 7 respectively.

[0023] The end of the wire 6 is connected and fixed to the upper contact plate 2.

[0024] The metal tube 5 is arranged horizontally, and a metal rod 4 is vertically welded at the center of its upper side. The upper end of the metal rod 4 is fixed to the center of the lower contact plate 2.

[0025] The length of the metal rod 4 is adjustable, which allows the height of the lower contact plate 2 to be adjusted.

[0026] The wire 7 is connected to the lower center of the metal tube 5.

[0027] The automatic ignition device forms a conductive circuit when the upper contact plate 1 and the lower contact plate 2 are in contact. Therefore, after all structural components are connected, the upper contact plate 1 and the lower contact plate 2 need to be brought into contact to verify whether the connection points are in good contact (the metal tube heats up).

[0028] The automatic tunnel closure device includes a support column 8, a suspension rope 9, a fixed pulley 10, a closing door 11, and a door frame 12.

[0029] Support column 8 is made of insulating material and its lower end is firmly attached to the bottom plate of the goaf.

[0030] The suspension rope 9 includes a longer steel wire rope segment, a shorter steel wire rope segment, and a flammable rope connecting them. The length of the flammable rope is greater than the length of the metal pipe and is coated with flammable materials.

[0031] The connection between the flammable rope and the steel wire rope can be done in this way: bend the connecting ends of the two steel wire ropes into an upward-curved hook, and wrap the two ends of the flammable rope around the hook and tie a knot to secure them. The figure only shows the connection position between the steel wire rope and the flammable rope.

[0032] The fixed pulley 10 is fixed to the roof of the goaf near the roadway via the mounting base 14.

[0033] The outer end of the shorter steel wire rope section is fixed to the support column 8, the flammable rope passes through the metal pipe 5, and the longer steel wire rope section goes down after passing over the fixed pulley 10, with its end fixed to the upper center position of the closed door 11.

[0034] The width and height of the closed door 11 are slightly larger than the width and height of the alleyway.

[0035] After the closed door 11 is suspended, it is located above the connection between the goaf and the roadway, with its bottom surface flush with the top surface of the roadway.

[0036] Because the closed door is large in size, it is suspended by a single steel wire rope. Therefore, door frames 12 are symmetrically set on both sides of the closed door 10 in the goaf to guide the door as it falls. The height of the door frames is greater than the height of the roadway to ensure that the closed door falls smoothly without jamming.

[0037] During on-site installation, the automatic sealing device should be installed first, followed by the automatic ignition device.

[0038] When the automatic ignition device is installed, the metal rod 4 supporting the lower contact plate 2 and the metal tube 5 is fixed by the horizontal rod 13 connected to the support column 8 of the automatic sealing device. The horizontal rod is an insulating rod, and the end of the metal rod can be fixed by an insulating clamp.

[0039] After the lower contact plate 2 is fixed in position, the upper contact plate 1 is fixed on the top plate of the goaf directly above the lower contact plate, so that the top plate on which the upper contact plate is fixed is as horizontal as possible.

[0040] Because different ore bodies have different properties and different roof subsidence limits, the spacing between the upper contact plate 1 and the lower contact plate 2 is set differently for different ore bodies. This spacing is achieved by adjusting the length of the metal rod 4.

[0041] Under normal conditions, the closed door 11 is suspended directly above the roadway connecting the goaf, with its bottom surface flush with the top surface of the roadway. This does not affect the entry and exit of personnel and / or equipment into the goaf, nor does it affect the drainage of water accumulated in the goaf.

[0042] When the roof of the goaf sinks to the point where the upper contact plate 1 and the lower contact plate 2 come into contact, the automatic ignition device forms a conductive circuit, the metal pipe 5 is energized and heats up rapidly, the flammable material coated on the flammable rope is ignited and burns the flammable rope, and the sealing door 11 falls rapidly under the action of gravity to seal the roadway and the goaf is sealed off.

[0043] As can be seen from the device and principle applied in this method, it organically combines mechanics and electricity, setting up a linked automatic ignition device and an automatic sealing device. This changes the passive goaf sealing method of existing technology to an active sealing method, allowing for precise control of the optimal sealing time for the goaf. When the goaf roof subsides to a preset critical value, the automatic ignition device burns the suspension rope of the automatic sealing device, causing the sealing door to fall rapidly and instantly, sealing the roadway connected to the goaf, thus accurately and quickly sealing the goaf. In short, this method can seize the optimal sealing moment to close the goaf, effectively preventing disasters and avoiding safety hazards. It requires no personnel patrols and effectively overcomes the aforementioned shortcomings of existing technologies.

Claims

1. A method for automatically sealing a goaf, characterized in that: The method involves setting up an automatic ignition device in the goaf area. The automatic ignition device includes a battery and a conductive circuit connected to it. The conductive circuit includes an upper contact plate and a lower contact plate that are respectively connected to the positive and negative terminals of the battery via wires. The upper contact plate is fixed to the top plate of the goaf area, and the lower contact plate is located directly below the upper contact plate. A metal tube is connected to the wire that is connected to the lower contact plate. A metal rod is vertically welded to the center of the upper side of the length direction of the metal tube, and the upper end of the metal rod is fixed to the center of the lower surface of the lower contact plate. The method also includes an automatic roadway sealing device, which includes a sealing door and its suspension device. The suspension device includes a suspension rope, a fixed pulley, and a support column. The suspension rope includes two steel wire ropes and a flammable section connecting them. The lower end of the longer steel wire rope is fixed to the upper center of the sealing door. The fixed pulley is fixed to the roof plate near the roadway in the goaf by a mounting seat. The longer steel wire rope turns horizontal after passing over the fixed pulley. The end of the shorter steel wire rope is fixed to the support column. The lower end of the support column is fixed to the bottom surface of the goaf. The suspension rope passes through a metal tube, and the section through which it passes is made of flammable material and coated with flammable material; the support column is connected to a horizontal bar, and the end of the horizontal bar is fixed to the middle of the metal bar by a clamp; When the roof of the goaf sinks to the point where the upper and lower contact plates come into contact, the conductive circuit is activated, the metal pipe is energized and heats up, igniting the flammable material and burning through the suspension rope. The sealing door then automatically falls to block the roadway connecting the goaf.

2. The automatic sealing method for goaf areas as described in claim 1, characterized in that: The battery comprises multiple individual cells connected in series. The positive and negative terminals of the series-connected cells are each connected to a wire, and one of the wires is connected to the upper contact plate.

3. The automatic goaf sealing method as described in claim 1, characterized in that: The length of the metal rod is adjustable.

4. The automatic goaf sealing method as described in claim 1, characterized in that: The upper end of the other wire connected to the battery is connected to the lower center of the metal tube.

5. The automatic sealing method for goaf areas as described in claim 1, characterized in that: The support columns, horizontal bars, and clamps are all made of insulating material.

6. The automatic goaf sealing method as described in claim 1, characterized in that: At the connecting roadway in the goaf, door frames are symmetrically installed on both sides of the closed door, and the height of the door frames is greater than the height of the roadway.

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