An upward-facing borehole sealing device for underground mines and a method of use

Abstract

The present application belongs to the technical field of mining, and particularly relates to an underground mine upward blast hole plugging device and a use method, characterized by comprising a blast hole plugging device and a blast hole perforation detection device, wherein the blast hole plugging device comprises a middle cylinder, foaming liquid in the middle cylinder, a ball body fixedly connected to the upper part of the middle cylinder, a plurality of blades connected to the ball body through a plurality of ear plates in a hinged manner, a plurality of foaming agent outlet baffles, a rubber pad at the lower end of the middle cylinder, the upper part of each blade connected to the ball body through a spring, the lower part of each blade connected to the corresponding foaming agent outlet baffle through a slide expansion joint, and one blade connected to an insulating sheet through a pull rope, and the blast hole perforation detection device comprises a fixing ring, a fixing cylinder and a sound wave generator. The blast hole plugging device and the blast hole perforation detection device are coordinated and matched to accurately position the blast hole perforation position; accurate positioning and plugging of the blast hole perforation position are automatically completed; the device is easy to operate and can efficiently complete work.

Description

Technical Field

[0001] This invention belongs to the field of mining technology, and in particular relates to a device for sealing blast holes in underground mines and its usage method. Background Technology

[0002] Drilling and blasting, as a primary method of rock excavation, is widely used in engineering construction fields such as water conservancy and hydropower, transportation, and mining. Hole plugging is a crucial step in the drilling and blasting process. It remains widely used, especially in underground mining operations, due to its relatively low cost. During blasting operations, to ensure the blasting effect and maximize the utilization of the energy generated, it is necessary to seal the blast holes. Existing methods mostly involve manually mixing mortar, concrete, drill cuttings, or loose materials like loess for sealing. Currently, many novel blast hole sealing methods have emerged. Commonly used methods can be broadly categorized into two types: one is the "mechanical component" blast hole sealing method. This method utilizes mechanical components to increase the resistance to the movement of the sealing material during blasting, thus sealing the blast hole. Examples include: patent application CN103453808 A ("Component with Concave Arc-shaped Part"), CN105526834 A ("Columnar Conical Component"), CN203744858 ("Device Composed of Fixing Ring and Rope Fixing Components"), CN108317923 A ("A Projectile-type Blast Hole Sealing Gun"), and CN 108413824... The first type of method discloses a "device composed of a ring, connecting piece, and spring piece," while the second type discloses an "external expansion cylinder and press-fitting head device." Another type is the "material-based" method for plugging blast holes, which uses plugs made of special materials to seal the blast holes. Commonly used plugging materials include slurry, water-filled slurry bags, and polyurethane foaming agents. Examples include: the "flexible cationized EVA blast hole plug" disclosed in CN 205192358 U, the "mining water-filled slurry bag" disclosed in CN105066804 A, the "plugging the bottom of the blast hole with an expanding material" disclosed in CN 205505878 U, and the "injecting a prepared mixed slurry into the blast hole using a slurry conveyor" disclosed in CN 211651401 U. These methods, to varying degrees, suffer from low efficiency, difficulty in strictly controlling blasting quality, and the inability to prevent "skyrocketing" (explosive blasts) and misfires. Some researchers have made certain improvements to the plugging structure, but these either result in poor sealing effects or complicated procedures, increasing the difficulty of construction. In on-site construction, especially when plugging upward-facing blast holes in underground mines, the weight of the explosives and plugging materials themselves prevents effective sealing, reducing charging efficiency and worsening the sealing effect. Another crucial issue in plugging upward-facing blast holes in underground mines is determining the hole's location; only by accurately locating the hole can effective sealing be achieved. Experimental research and engineering practice have proven that thorough plugging after charging the blast hole can significantly reduce blasting costs, improve blasting effectiveness, and accelerate project progress, resulting in significant economic and social benefits. Summary of the Invention

[0003] The purpose of this invention is to provide an underground mine borehole sealing device and its usage method, which mainly solves the problems of the inability to effectively seal boreholes due to the weight of the explosives and sealing materials, and the determination of the borehole perforation location.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] The underground mine borehole sealing device of the present invention is characterized by comprising a borehole sealing device and a borehole perforation detection device.

[0006] The borehole sealing device includes an intermediate cylinder, a foaming liquid disposed inside the intermediate cylinder, a sphere fixedly connected to the top of the intermediate cylinder, several lugs disposed at the connection between the cylinder and the sphere, several blades connected to the sphere by hinges through these lugs, several foaming agent outlet baffles disposed on the cylinder wall of the intermediate cylinder, and a rubber pad fixedly connected to the lower end of the intermediate cylinder.

[0007] The upper part of each blade is connected to the sphere via a spring, and the lower part of each blade is connected to the corresponding foaming agent outlet baffle via a slide rail telescopic rod. One of the blades is connected to an insulating sheet via a pull rope.

[0008] The aforementioned borehole perforation detection device includes a fixing ring, a fixing cylinder connected to the fixing ring, and an acoustic wave generator placed inside the fixing cylinder.

[0009] The number of the aforementioned blades is 8.

[0010] The number of blades is equal to the number of foaming agent outlet baffles and they correspond one-to-one.

[0011] The diameter of the rubber pad is equal to the diameter of the inner wall of the borehole.

[0012] A method for using an underground mine borehole sealing device, characterized by comprising the following steps:

[0013] (1) At the start of the measurement, the borehole leakage detection device is connected to the support guide rod, and the lower part of the middle cylinder of the borehole sealing device is installed on the top of the support guide rod;

[0014] (2) The support guide rod drives the borehole sealing device and the detection device to extend into the upper medium-deep hole, and the blades maintain a downward posture under the clamping force of the borehole inner wall;

[0015] (3) The rope and the insulating sheet move downwards. By pulling the rope, the insulating sheet is inserted into the circuit connection of the detection device, so that the sound wave generator is in a de-energized state.

[0016] (4) Continue to push the guide rod upward, and the borehole sealing device and the detection device will continue to move upward under the drive of the guide rod;

[0017] (5) When the borehole sealing device and the borehole leakage detection device move together to the leakage point, the blades of the borehole sealing device are not held by the borehole arm and move upward under the spring force.

[0018] (6) The blade drives the slide rail telescopic rod to move upward, and the slide rail telescopic rod pulls the foaming agent outlet baffle, and the foaming agent outlet baffle is in the fully open state;

[0019] (7) The blade will also drive the pull rope to move upward. The insulating sheet will be pulled away from the circuit connection of the detection device by the pull rope, so that the sound wave generator is powered on and triggered.

[0020] (8) After the operator receives the trigger signal via mobile phone or other electronic device, he stops the upward conveying of the guide rod and retracts the guide rod and the detection device.

[0021] (9) The borehole sealing device stays at the location of the borehole leak under the action of the blades, preventing the borehole sealing device from falling off, thereby achieving precise positioning of the borehole leak location;

[0022] (10) During the sealing process, the foaming agent flows out from the foaming agent outlet and bottom of the middle cylinder together, combines with the air to foam and solidify quickly. The upper foaming agent fills the entire space between the rubber pad and the blade, and the lower foaming agent expands and extends to a length of about 1m. Finally, the foamed body tightly combines the sealing device with the inner wall of the blast hole into a whole, realizing the effective sealing of the blast hole from the underground mine.

[0023] Advantages of this invention:

[0024] (1) The underground mine borehole sealing device and its usage method of the present invention, wherein the borehole sealing device and the borehole leakage detection device work together to accurately locate the location of the borehole leakage.

[0025] (2) The underground mine upward blast hole sealing device and its usage method of the present invention, the blade of the blast hole sealing device moves upward at the blast hole leakage point without the clamping force of the blast hole wall. After reaching the sealing position, it drives the slide telescopic rod to pull the foaming agent outlet baffle. The foaming agent flows out from the baffle opening and the bottom of the cylinder, combines with the air to foam and quickly solidify, thereby sealing the blast hole leakage point;

[0026] (3) The underground mine upward blast hole sealing device and its usage method of the present invention, the blast hole sealing device and the blast hole leakage detection device move upward under the drive of the support guide rod and extend into the upward blast hole about 20 meters away, and the precise positioning and sealing of the blast hole leakage hole are completed automatically.

[0027] (4) The underground mine upward blast hole sealing device and its usage method of the present invention only require underground mine workers to send the guide rod upward and retract the guide rod after receiving the signal. It is easy to operate and can complete the work efficiently. Attached Figure Description

[0028] Figure 1 This is an assembly diagram of the borehole sealing device of the present invention.

[0029] Figure 2 This is an assembly diagram of the borehole perforation detection device of the present invention.

[0030] Figure 3 This is a state diagram of the movement process of the present invention.

[0031] Figure 4 This is another state diagram during the movement process of the present invention.

[0032] Figure 5 This is a diagram showing the upward motion during the operation of this invention.

[0033] Figure 6 This is a diagram showing the state of the device moving to the perforation area during the operation of this invention.

[0034] Figure 7 This is a diagram showing the state of the device being retracted during the operation of this invention. Detailed Implementation

[0035] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0036] like Figure 1-7 As shown, the underground mine borehole sealing device of the present invention is characterized by comprising a borehole sealing device and a borehole perforation detection device.

[0037] The borehole sealing device includes an intermediate cylinder 1, a foaming liquid 2 disposed inside the intermediate cylinder 1, a sphere 3 fixedly connected to the upper part of the intermediate cylinder 1, several ear plates 4 disposed at the connection between the cylinder 1 and the sphere 3, several blades 5 connected to the sphere 3 by means of hinges through the ear plates 4, several foaming agent outlet baffles 8 disposed on the cylinder wall of the intermediate cylinder 1, and a rubber pad 11 fixedly connected to the lower end of the intermediate cylinder 1.

[0038] Each blade 5 is connected to the sphere 3 at the top via a spring 6, and each blade 5 is connected to the corresponding foaming agent outlet baffle 8 at the bottom via a slide rail telescopic rod 7. One of the blades 5 is connected to the insulating sheet 10 via a pull rope 9.

[0039] The aforementioned borehole perforation detection device includes a fixing ring 12, a fixing cylinder 13 connected to the fixing ring 12, and a sound wave generator 14 placed inside the fixing cylinder 13.

[0040] The number of the aforementioned blades 5 is 8.

[0041] The number of blades 5 is equal to the number of foaming agent outlet baffles 8 and they correspond one-to-one.

[0042] The diameter of the rubber pad 11 is equal to the diameter of the inner wall of the borehole.

[0043] A method for using an underground mine borehole sealing device, characterized by comprising the following steps:

[0044] (1) At the start of the measurement, the borehole leakage detection device is connected to the support guide rod, and the lower part of the intermediate cylinder 1 of the borehole sealing device is installed on the top of the support guide rod;

[0045] (2) The support guide rod drives the borehole sealing device and the detection device to extend into the upper medium-deep hole, and the blade 5 maintains a downward posture under the clamping force of the borehole inner wall;

[0046] (3) Pulling rope 9 and insulating sheet 10 move downwards, and by pulling pull rope 9, insulating sheet 10 is inserted into the circuit connection of the detection device, so that the sound wave generator is in a de-energized state;

[0047] (4) Continue to push the guide rod upward, and the borehole sealing device and the detection device will continue to move upward under the drive of the guide rod;

[0048] (5) When the borehole sealing device and the borehole leakage detection device move together to the leakage point, the blade 5 of the borehole sealing device does not have the clamping force of the borehole arm, and the blade 5 moves upward under the action of the spring force of the spring 6.

[0049] (6) The blade 5 drives the slide rail telescopic rod 7 to move upward, and the slide rail telescopic rod 7 pulls the foaming agent outlet baffle 8, so that the foaming agent outlet baffle 8 is in the fully open state.

[0050] (7) The blade 5 will also drive the pull rope 9 to move upward. The insulating sheet 10 will be pulled away from the circuit connection of the detection device under the action of the pull rope 9, so that the sound wave generator is powered on and triggered.

[0051] (8) After the operator receives the trigger signal via mobile phone or other electronic device, he stops the upward conveying of the guide rod and retracts the guide rod and the detection device.

[0052] (9) Under the action of blade 5, the borehole sealing device stays at the borehole leakage point to prevent the borehole sealing device from falling off, thereby achieving precise positioning of the borehole leakage point.

[0053] (10) During the sealing process, the foaming agent 2 flows out from the foaming agent outlet and bottom of the middle cylinder 1 together, combines with the air to foam and solidify quickly. The upper foaming agent fills the entire space between the rubber pad 11 and the blade 5, and the lower foaming agent expands and extends to a length of about 1m. Finally, the foamed body tightly combines the sealing device with the inner wall of the blast hole into a whole, realizing the effective sealing of the blast hole from the underground mine.

[0054] The present invention relates to an underground mine upward blast hole sealing device and its usage method, such as... Figure 1 As shown, the borehole sealing device consists of an intermediate cylinder 1 filled with foaming liquid 2, a sphere 3 fixedly connected to the top of the cylinder 1, and eight ear plates 4 evenly distributed around the sphere 3 at the connection between the cylinder 1 and the sphere 3. Eight blades 5 are connected to the sphere 3 via hinges to the ear plates 4. The upper part of each blade 5 is connected to the sphere 3 via a spring 6, and the lower part of each blade 5 is connected to the foaming agent outlet baffle 8 via a sliding telescopic rod 7. One blade 5 is connected to an insulating sheet 10 via a pull rope 9, which is a flexible rope or wire with a certain tensile strength. The pull rope 9 is bound to this blade 5. A rubber pad 11 is fixedly connected to the lower end of the intermediate cylinder 1, and the diameter of the rubber pad 11 is equal to the diameter of the inner wall of the borehole.

[0055] like Figure 2 As shown, the borehole perforation detection device includes a fixing ring 12, a fixing cylinder 13 connected to the fixing ring 12, and a sound wave generator 14 placed inside the fixing cylinder 13.

[0056] like Figure 3 As shown, at the start of the measurement, the borehole leakage detection device is connected to the support guide rod. The lower part of the middle cylinder 1 of the borehole sealing device is installed at the top of the support guide rod. The support guide rod drives the borehole sealing device and the detection device to extend into the upper-middle-depth borehole. The blade 5 is held in a downward position by the clamping force of the borehole inner wall. The rope 9 and the insulating sheet 10 move downward. By pulling the rope 9, the insulating sheet 10 is inserted into the circuit connection of the detection device, so that the sound wave generator is in a de-energized state. The guide rod continues to be pushed upward. The borehole sealing device and the detection device continue to move upward under the drive of the guide rod.

[0057] like Figure 4As shown, when the borehole sealing device and the borehole leakage detection device move together to the leakage point, the blade 5 of the borehole sealing device is not held by the borehole arm. Under the spring force of the spring 6, the blade 5 moves upward. At this time, the blade 5 can perform two actions simultaneously: first, the blade 5 drives the slide rail telescopic rod 7 to move upward, and the slide rail telescopic rod 7 pulls the foaming agent outlet baffle 8, which is in a fully open state; second, the blade 5 also drives the rope 9 to move upward, and the insulating sheet 10 is pulled away from the circuit connection of the detection device under the action of the rope 9, so that the sound wave generator is powered on and triggered. After the operator receives the trigger signal through a mobile phone or other electronic device, he stops the upward conveying of the guide rod and retracts the guide rod and the detection device. After the guide rod and the detection device are retracted, the borehole sealing device stays at the borehole leakage point under the action of the blade 5 to prevent the borehole sealing device from falling, thereby achieving precise positioning of the borehole leakage point. During the sealing process, foaming agent 2 flows out from the foaming agent outlet and the bottom of the intermediate cylinder 1, combines with air to foam and quickly solidify, sealing the leaking parts of the blast hole. The upper foaming agent fills the entire space between the rubber pad 11 and the blade 5, and the bottom foaming agent expands and extends to a length of about 1m and hardens within 28 seconds. Finally, the foamed body tightly combines the sealing device with the inner wall of the blast hole into a whole, achieving effective sealing of the blast hole from the underground mine.

[0058] The present invention relates to an underground mine upward blast hole sealing device and its usage method. The blast hole sealing device and the blast hole leakage detection device work together to accurately locate the blast hole leakage. The blade 5 of the blast hole sealing device moves upward at the blast hole leakage location without the clamping force of the blast hole wall. At the same time, it drives the slide rail telescopic rod 7 to pull the foaming agent outlet baffle 8. The foaming agent flows out, combines with air, foams, and quickly solidifies, sealing the blast hole leakage. After the blast hole sealing device and the blast hole leakage detection device move upward under the drive of the support guide rod, they extend to the depth of the upward blast hole about 20 meters. The accurate location and sealing of the blast hole leakage are completed automatically. The underground mine upward blast hole sealing device of the present invention only requires underground mine workers to send the guide rod upward and retract the guide rod after receiving a signal. It is easy to operate and can complete the work efficiently.

Claims

1. A device for sealing upward-facing blast holes in underground mines, characterized in that... Includes borehole sealing devices and borehole leakage detection devices. The borehole sealing device includes an intermediate cylinder, a foaming liquid disposed inside the intermediate cylinder, a sphere fixedly connected to the top of the intermediate cylinder, several lugs disposed at the connection between the cylinder and the sphere, several blades connected to the sphere by hinges through these lugs, several foaming agent outlet baffles disposed on the cylinder wall of the intermediate cylinder, and a rubber pad fixedly connected to the lower end of the intermediate cylinder. The upper part of each blade is connected to the sphere via a spring, and the lower part of each blade is connected to the corresponding foaming agent outlet baffle via a slide rail telescopic rod. One of the blades is connected to an insulating sheet via a pull rope. The aforementioned borehole leakage detection device includes a fixing ring, a fixing cylinder connected to the fixing ring, and a sound wave generator placed inside the fixing cylinder. The method for using an underground mine borehole sealing device includes the following steps: (1) At the start of the measurement, the borehole leakage detection device is connected to the support guide rod, and the lower part of the middle cylinder of the borehole sealing device is installed on the top of the support guide rod; (2) The support guide rod drives the borehole sealing device and the detection device to extend into the upper medium-deep hole, and the blades maintain a downward posture under the clamping force of the borehole inner wall; (3) The rope and the insulating sheet move downwards. By pulling the rope, the insulating sheet is inserted into the circuit connection of the detection device, so that the sound wave generator is in a de-energized state. (4) Continue to push the guide rod upward, and the borehole sealing device and the detection device will continue to move upward under the drive of the guide rod; (5) When the borehole sealing device and the borehole leakage detection device move together to the leakage point, the blades of the borehole sealing device are not held by the borehole arm and move upward under the spring force. (6) The blade drives the slide rail telescopic rod to move upward, and the slide rail telescopic rod pulls the foaming agent outlet baffle, and the foaming agent outlet baffle is in the fully open state; (7) The blade will also drive the pull rope to move upward. The insulating sheet will be pulled away from the circuit connection of the detection device by the pull rope, so that the sound wave generator is powered on and triggered. (8) After the operator receives the trigger signal via mobile phone or other electronic device, he stops the upward conveying of the guide rod and retracts the guide rod and the detection device. (9) Under the action of the blades, the borehole sealing device stays at the location of the borehole leak, preventing the borehole sealing device from falling off, thereby achieving precise positioning of the borehole leak location; (10) During the sealing process, the foaming agent flows out from the foaming agent outlet and bottom of the middle cylinder together, combines with the air to foam and solidify quickly. The upper foaming agent fills the entire space between the rubber pad and the blade, and the lower foaming agent expands and extends to a length of about 1m. Finally, the foamed body tightly combines the sealing device with the inner wall of the blast hole into a whole, realizing the effective sealing of the blast hole from the underground mine.

2. The underground mine upward blast hole sealing device according to claim 1, characterized in that... The number of the aforementioned blades is 8.

3. The underground mine upward blast hole sealing device according to claim 1, characterized in that... The number of blades is equal to the number of foaming agent outlet baffles and they correspond one-to-one.

4. The underground mine upward blast hole sealing device according to claim 1, characterized in that... The diameter of the rubber pad is equal to the diameter of the inner wall of the borehole.

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