Emergency water plugging and hole sealing device for drilling water outlet and construction method

Abstract

The invention discloses an emergency water plugging and hole sealing device and a construction method, and relates to the field of mine detection, and the emergency water plugging and hole sealing device comprises a gland connected with a water gate, an interface device, a steel pipe with a male screw thread and a female screw thread, a ball valve and a hole sealing cap. The gland connector device penetrates through the drill rod to be connected with the drilling water gate, the tail end of the gland connector device is connected with the male screw thread steel pipe and the female screw thread steel pipe, and the exposed drill rod is completely wrapped in the steel pipes by connecting the steel pipes. The tail end of the steel pipe is connected with the hole sealing cap, the ball valve is installed on the hole sealing cap, and the water quantity can be effectively controlled by controlling the ball valve. The emergency water plugging and hole sealing device is used for emergencies such as sudden failure of a drilling machine, power failure of a switch, failure of a water pump and incapability of closing a water gate at a hole opening after the underground water exploring and discharging drill hole is hollow. A large number of drill rods reserved in water outlet drill holes cannot be pulled out, the water quantity cannot be effectively controlled, a working face is prone to being flooded, and the life safety of underground staff is threatened. The emergency water plugging and hole sealing device can be used for effectively plugging water in a drilling hole and avoiding water disaster accidents.

Description

Technical Field

[0001] The invention relates to the field of mine detection, in particular to a drilling hole emergency water plugging and sealing device and a construction method. Background Art

[0002] Floods are common accidents in coal mine production. Such accidents are sudden and cause serious harm to mines. In some production mines, there are often old empty small kilns filled with water, faults and water-rich layers. In order to safely recover the ore body, it is necessary to take water prevention and control measures and construct water exploration and drainage drilling holes. In the process of water exploration and drainage, unexpected failures and other crisis situations occur. The drill rod cannot be pulled out of the hole, the water volume in the drilling hole cannot be effectively controlled in time, and the water volume continues to be drained. There is a risk of flooding the excavation working face, which seriously threatens the life and health of mine personnel.

[0003] Some small coal mines have a long history of mining, but data is seriously missing. It is difficult to accurately control the mining location and scope, and the amount of water accumulation. When exploring and releasing such old mine water or old empty water, the water volume is often large and the water flow is rapid, which can easily lead to serious accidents. Therefore, in the process of exploring and releasing such small coal mine water accumulation or rich and strong old mine water, it is an urgent problem to effectively control the water output of the borehole at any time to ensure the safety of water release.

[0004] During the exploration and release of water, in order to avoid mechanical and electrical equipment failures, power outages, failures of the sluice gate to close normally, failures of the drainage system, and instantaneous increase in water volume during the drilling process of the drilling rig, which may lead to flooding of the working face or serious accidents that cause life injury to underground miners. This invention is a borehole water emergency plugging and sealing device. Based on the harsh environment of underground water exploration and release, the emergency water plugging and sealing device can be operated conveniently and quickly, and the water volume in the borehole can be effectively controlled in the shortest time. This ensures the safe exploration and release of old empty water or small coal mine water underground, and protects the lives of miners and national property. Summary of the invention

[0005] Aiming at the potential safety hazard caused by water accumulation in old coal mines or small coal mines, the present invention provides a drilling hole emergency water plugging and sealing device and a construction method.

[0006] The present invention is achieved through the following technical solutions:

[0007] An emergency water plugging and hole sealing device comprises a gland and an interface device, a steel pipe with a male thread and a female thread, a ball valve controller, and a hole sealing cap.

[0008] The gland and interface device are composed of a flange welded to a steel pipe with a male thread, and the flange of the gland and interface device is connected to the flange of the water gate;

[0009] The steel pipe with male and female threads is used to connect the gland, the interface device and the sealing cap, and is used to wrap all the exposed drill pipes in the steel pipe;

[0010] The sealing cap is equipped with a three-way device, and the three-way device can be equipped with a ball valve controller to control the amount of water shut-off, or a pressure gauge to measure the water pressure in the hole;

[0011] When water is coming out, tighten the ball valve controller to achieve the purpose of stopping water from the drilling hole. It can effectively block water from the drilling hole in an emergency situation with good results.

[0012] The flange of the gland and the interface device is six inches, and is welded to a 200mm long φ108mm steel pipe with a male thread.

[0013] The φ108mm steel pipe with male and female threads (1.5m) passes through the φ85mm drill pipe and is connected to the gland and interface device. When the φ85mm drill pipe is exposed for more than 2m, a second steel pipe is added until the exposed drill pipe is completely wrapped in the steel pipe.

[0014] The sealing cap has a three-way device. A φ108mm round steel plate (10mm thick) is welded to a φ108mm steel pipe with a female thread that is about 200mm long. A φ20mm hole is drilled in the middle of the steel plate, and a φ38mm three-way device is welded on the φ20mm hole. A φ38mm ball valve can be placed on the three-way to control the amount of water to be shut off, or a pressure gauge can be installed to measure the water pressure in the hole.

[0015] The emergency water blocking and hole sealing device is connected to the water gate of the φ108mm drill hole.

[0016] A construction method for an emergency water plugging and sealing device, the specific steps are:

[0017] Step 1: Remove the water-discharging drill hole with the drill rod in the hole where the power is off and the drilling rig cannot be started, and remove the water detector and the blowout prevention device. Use the gland and interface device, and connect the flange end of the φ108mm male thread upward through the drill rod in the hole and the flange of the water gate at the borehole.

[0018] Step 2: Use a φ108mm steel pipe with male and female threads (each 1.5m), with the female end facing upward, to pass through the drill pipe and tighten the male thread of the gland and interface device. Before connecting, wrap hemp rope and apply lead oil on the male thread of the gland and interface device. If the exposed length of the borehole exceeds 2m, add another φ108mm steel pipe with male and female threads (each 1.5m) until the drill pipe of the borehole is completely wrapped in the φ108mm steel pipe with male and female threads.

[0019] Step 3. Tighten the φ108mm female thread with a tee cap and the φ108mm male thread of the steel pipe. Wrap hemp rope and apply lead oil on the male thread before connection.

[0020] Step 4: Control the two φ38mm ball valve controllers on the three-way device to quickly and effectively control the water output from the borehole under emergency conditions such as unexpected power outages or water gate failures.

[0021] Step 5: A pressure gauge can be installed at the position of the ball valve controller to measure the water pressure in the hole. The pressure value obtained by the pressure gauge can be used to calculate the head height of the old kiln water or the small coal mine water accumulation, and the estimated amount of water accumulation. The emergency water plugging and hole sealing device can control the amount of water released, and achieve a safe and controllable release period for the old kiln water or the small coal mine water accumulation.

[0022] Compared with the prior art, the present invention has the following characteristics and beneficial effects:

[0023] The present invention provides a drilling water emergency plugging and sealing device, which connects and wraps the drilling hole and the drill rod through a gland and an interface device and a steel pipe with male and female threads, and at the same time, the sealing cap and the ball valve controller control the water discharge and water volume. A pressure gauge can also be installed at the position of the ball valve controller to measure the water pressure in the hole, and predict the water accumulation and water discharge period of the old kiln.

[0024] The present invention is suitable for the exploration and drainage drilling construction of small coal mines with old empty spaces filled with water, water accumulation in goafs, faults and water-rich layers. It solves the problems of electromechanical equipment failure, power outage failure, failure of sluice gate to close normally, drainage system failure, instantaneous increase in water volume, etc. during the exploration and drainage process. The drill rod cannot be pulled out of the hole, the water volume in the borehole cannot be effectively controlled in time, and the water volume is continuously drained. The emergency water plugging and hole sealing device can be operated conveniently and quickly, and the water volume in the borehole can be effectively controlled in the shortest time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention is further described in detail below with reference to the accompanying drawings.

[0026] Figure 1 The invention discloses an emergency water blocking and hole sealing device.

[0027] Figure 2 This is a schematic diagram of the structure of the gland and interface device of the present invention.

[0028] Figure 3 It is a structural schematic diagram of the sealing cap of the present invention

[0029] Figure 4 This is a schematic diagram of the structure of the ball valve controller of the present invention.

[0030] Figure numerals: 1-stratum (coal seam); 2-borehole; 3-drill rod; 4-orifice; 5-water gate; 6-water gate flange; 7-pressure cover and interface device; 8-steel pipe with male and female threads; 9-sealing cap; 10-ball valve controller; 11-pressure cover and flange of interface device; 12-steel pipe with male threads; 13-steel pipe with female threads; 14-round steel plate; 15-tee device. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings, which are intended to explain the present invention rather than to limit it.

[0032] Example reference Figure 1 As shown, an emergency water plugging and hole sealing device and a construction method are provided, wherein the emergency water plugging and hole sealing device includes a pressure cover and an interface device 7, a steel pipe with a male thread and a female thread 8, a ball valve controller 10, and a hole sealing cap 9.

[0033] The pressure cover and interface device 7 is composed of a flange 11 welded to a steel pipe 12 with a male thread, and is used to be installed in the orifice 4 of the formation water exploration and drainage borehole 3. The flange 11 of the pressure cover and interface device 7 is connected to the flange 6 of the orifice water gate 5; the borehole diameter is 108mm.

[0034] The flange 11 of the gland and interface device 7 is six inches, and is welded with a 200mm long φ108mm steel pipe 12 with a male thread.

[0035] The steel pipe 8 with male and female threads is used to connect the gland and interface device 7 and the sealing cap 9. Several steel pipes are connected to each other to wrap the exposed drill rod 3 completely inside the steel pipe; the steel pipe has a diameter of 108mm and a length of 1.5m. The drill rod has a diameter of 85mm.

[0036] The sealing cap 9 is made by welding a φ108mm round steel plate (10mm thick) 14 to a φ108mm female threaded steel pipe 13 about 200mm long, a φ20mm hole is drilled in the middle of the steel plate, and a φ38mm three-way device 15 is welded on the φ20mm hole.

[0037] The sealing cap 9 is provided with a three-way device 15, which is installed at the end of the emergency water blocking and sealing device, and the φ108mm sealing cap female thread is tightly connected with the φ108mm steel pipe 8 male thread and lead oil wrapped hemp rope.

[0038] A ball valve controller 10 can be installed on the three-way device 15 to control the water volume to be closed, or a pressure gauge can be installed to measure the water pressure in the hole. The ball valve aperture is 38 mm.

[0039] A construction method for an emergency water plugging and sealing device, the specific steps are:

[0040] Step 1: Remove the water-discharging borehole 2 with the drill rod in the hole where the power is off and the drilling rig cannot be started, and remove the water detector and the blowout prevention device. Use the gland and interface device 7, and the flange end of the φ108mm male thread passes through the drill rod in the hole upwards and connects to the flange of the water gate 4 at the borehole.

[0041] Step 2: Use a φ108mm steel pipe with male thread and female thread (each 1.5m) 8, with the female thread facing upward, to pass through the drilling rod 3 and tighten the male thread of the gland and interface device 7. Before connection, wrap hemp rope and apply lead oil on the male thread of the gland and interface device 7. If the exposed length of the borehole exceeds 2m, add another φ108mm steel pipe with male thread and female thread (each 1.5m) until the drill rod of the borehole is completely wrapped in the φ108mm steel pipe with male thread and female thread 8.

[0042] Step 3, tighten the φ108mm female thread buckle with the three-way device 15 sealing cap 9 and the φ108mm steel pipe 8 male thread buckle, wrap hemp rope and apply lead oil on the male thread before connection.

[0043] Step 4: Control the two φ38mm ball valve controllers 10 on the three-way device to quickly and effectively control the water discharge from the borehole under emergency conditions such as unexpected power outage or water gate failure.

[0044] Step 5: The pressure gauge is pressed on the three-way device 15 of the sealing cap to calculate the water level of the old kiln, accurately estimate the amount of water accumulated in the old kiln, and release the water safely and controllably.

[0045] The invention is preferably used to detect and release water from old empty spaces or small coal mines. An emergency water plugging and hole sealing device can be used. It can effectively avoid water coming out of the borehole in unexpected situations and control the water volume when the drill rod cannot be pulled out. It ensures that the water volume can be effectively controlled to prevent flooding of the excavation working face and casualties caused by water disasters.

Claims

1. An emergency water plugging and sealing device is characterized in that: The emergency water plugging and hole sealing device comprises a gland and an interface device (7), a steel pipe with a male thread and a female thread (8), a hole sealing cap (9), and a ball valve controller (10); The gland and interface device (7) is composed of a flange (11) welded to a steel pipe (12) with a male thread, and the flange (12) of the gland and interface device (7) is connected to the flange (6) of the water gate (5); The steel pipe (8) with male and female threads is used to connect the gland and interface device (7) and the sealing cap (9), and is used to completely wrap the exposed drill pipe (3) in the steel pipe; The sealing cap (9) is provided with a three-way device (15), and the three-way device (15) can be provided with a ball valve controller (10) for controlling the shut-off water volume, or a pressure gauge for measuring the water pressure in the hole; When water is coming out, the ball valve controller (10) is tightened to achieve the purpose of stopping water in the drilling hole, which can effectively block water coming out of the drilling hole in an emergency situation, with good effect.

2. The emergency water plugging and sealing device according to claim 1 is characterized in that: The flange (11) of the gland and interface device (7) is six inches, and is welded with a 200mm long φ108mm steel pipe (12) with a male thread.

3. The emergency water plugging and sealing device according to claim 1 is characterized in that: The φ108mm steel pipe (1.5m) (8) with male and female threads passes through the φ85mm drill rod (3) and is connected to the gland and interface device (7). When the φ85mm drill rod (3) is exposed for more than 2m, a second steel pipe (8) is added until the exposed drill rod (3) is completely wrapped in the steel pipe (8).

4. The emergency water plugging and sealing device according to claim 1 is characterized in that: The sealing cap (9) is provided with a three-way device (15), and a φ108mm steel pipe with a female thread (13) about 200mm long is welded with a φ108mm circular steel plate (10mm thick) (14), a φ20mm hole is drilled in the middle of the steel plate, and a φ38mm three-way device (15) is welded on the φ20mm hole. A φ38mm ball valve (10) can be installed on the three-way to control the water volume, or a pressure gauge can be installed to measure the water pressure in the hole.

5. The emergency water plugging and sealing device according to claim 1 is characterized in that: The emergency water blocking and hole sealing device is connected to a water gate (5) of a φ108 mm drill hole (4).

6. The construction method of the emergency water plugging and sealing device according to claim 1 comprises the following specific steps: Step 1: Remove the water outlet borehole (2) with the drill rod left in the hole where the power is off and the drilling rig cannot be started, remove the water filter and the blowout prevention device. Use the gland and interface device (7), and the flange (11) with a φ108mm male thread is passed upward through the drill rod in the hole and connected to the flange (6) of the water gate (5) at the borehole mouth. Step 2: Use a φ108mm steel pipe with male thread and female thread (each 1.5m) (8), with the female thread facing upward, to pass through the drilling rod (3) and tighten the male thread of the gland and interface device (7). Before connection, wrap hemp rope and apply lead oil on the male thread of the gland and interface device (7). If the exposed length of the borehole exceeds 2m, add another φ108mm steel pipe with male thread and female thread (each 1.5m) (8) until the drill rod of the borehole is completely wrapped in the φ108mm steel pipe with male thread and female thread (8). Step 3, the φ108mm female thread buckle with the sealing cap (9) of the tee device (15) is tightened and connected with the male thread of the φ108mm steel pipe (8), and before the connection, the male thread is wrapped with hemp rope and coated with lead oil. Step 4: Control two φ38 mm ball valve controllers (10) on the three-way device (15) to quickly and effectively control the water discharge from the borehole under emergency conditions such as unexpected power outage or water gate failure. Step 5: The pressure gauge is placed on the three-way device (15) of the sealing cap to calculate the water level of the old kiln, accurately estimate the amount of water accumulated in the old kiln, and release the water safely and controllably.

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