Mining TBM carrying type geological advanced forecasting system and method

Abstract

The invention provides a mining TBM carrying type geological advanced forecasting system and method, a mining intrinsic safety type detection host is used for generating and sending a seismic source control signal to a mining intrinsic safety type pneumatic seismic source so as to generate vibration, and geological advanced forecasting is realized according to a vibration signal of a mining intrinsic safety type detector system; an input signal of the mining intrinsic safety type detector enters a signal acquisition system through an input isolation module, and a seismic source control signal enters a pneumatic seismic source through an output isolation module. And the industrial personal computer is directly connected with the signal acquisition system and the seismic source control system so as to realize acquisition of input signals of the detector and control of the pneumatic seismic source.

Description

Technical Field

[0001] The present invention belongs to the field of geological advance prediction in coal mine tunneling, and in particular relates to a mine-used TBM-mounted geological advance prediction system and method. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] With the advancement of technology, full-face rock tunnel boring machines (TBMs) for mining have begun to be used in coal mine tunnel excavation construction with their significant advantages of safety and efficiency. However, the underground geological conditions are complex. If the unfavorable geological conditions such as weak rock mass, fault fracture zone, and disaster water bodies in front of the coal mine tunnel are not explored in advance, landslides, sudden water inrush and other disasters are very likely to occur under the influence of TBM construction disturbance, resulting in economic losses, casualties, and construction delays.

[0005] Most of the geological advance prediction instruments used in mines are intrinsically safe instruments. In order to meet the intrinsically safe explosion-proof requirements, the power of the instruments is limited, and their performance is also limited accordingly. In addition, battery-operated instruments are not allowed to be charged underground in coal mines. They need to be brought to the surface for charging after each use and then brought underground for the next use, which is inconvenient to use.

[0006] At present, there are few types of seismic sources available for advanced geological exploration in coal mines, mainly artificial seismic sources and explosive seismic sources. The vibration signals stimulated by artificial seismic sources are unstable, and explosive seismic sources have many limitations in their use in coal mines. Both are not ideal seismic sources.

[0007] In addition, most mining detectors are voltage-type detectors, which are easily affected by external electromagnetic interference during long-distance transmission. Moreover, the drilling installation method is cumbersome, time-consuming and labor-intensive. Summary of the invention

[0008] In order to solve the above problems, the present invention proposes a mining TBM-mounted geological advance prediction system and method.

[0009] According to some embodiments, the present invention adopts the following technical solutions:

[0010] A mine-used TBM-mounted geological advance prediction system includes a mine-used intrinsically safe detection host, a mine-used intrinsically safe geophone system and a mine-used intrinsically safe pneumatic seismic source, wherein:

[0011] The mine intrinsically safe detection host is used to generate and send a seismic source control signal to the mine intrinsically safe pneumatic seismic source to generate vibration, and realize geological advance prediction according to the vibration signal of the mine intrinsically safe geophone system;

[0012] The mine intrinsically safe detection host includes a power supply system, a signal acquisition system, an industrial computer, an input isolation module, an output isolation module and a source control system;

[0013] The signal acquisition system is connected to the input isolation module, and the input isolation module is used to receive the vibration signal sent by the mining intrinsically safe detector system;

[0014] The power supply system includes an intrinsically safe power supply and a switching power supply, wherein the intrinsically safe power supply is used to provide electric energy for the intrinsically safe power supply modules in the input isolation module and the output isolation module, and the switching power supply is used to provide electric energy for the working power supplies in the input isolation module and the output isolation module;

[0015] The industrial computer is connected to the signal acquisition system and the seismic source control system to generate a seismic source control signal to the seismic source control system, obtain and analyze the vibration signal of the signal acquisition system, and perform geological advance prediction;

[0016] The seismic source control system is connected to the output isolation module and is used to send a seismic source control signal to the intrinsically safe pneumatic seismic source for mining.

[0017] As an optional implementation, the intrinsically safe power supply and the switching power supply are connected to an external power supply, and the external power supply is connected to the intrinsically safe power supply and the switching power supply through a protection circuit, an isolation switch and an isolation transformer.

[0018] As an optional embodiment, it also includes a flameproof shell, which includes four flameproof chambers: a power supply chamber, a transformer chamber, a flameproof main chamber and an intrinsically safe signal chamber, wherein the power supply chamber is used to set up a power supply system, the transformer chamber is used to set up an isolating switch and an isolation transformer, and the flameproof main chamber is used to set up a signal acquisition system, an industrial computer, an input isolation module, an output isolation module and a seismic source control system; the external detector input signal and the pneumatic seismic source output signal are introduced into the intrinsically safe signal chamber via a mining introduction device.

[0019] As a further implementation, the flameproof housing is made of carbon steel;

[0020] Or, the flameproof housing is provided with a quick-opening door, the isolating switch is connected to the switch handle, when the switch handle is in the power-off position, the quick-opening door can be opened by screwing in the anti-rotation screw, and when the switch handle is in the power-on state, the handle and the quick-opening door are in a mechanical locking state to prevent the quick-opening door from opening;

[0021] The quick-opening door is located in front of the flameproof main chamber and is connected by a hinge. The quick-opening door is provided with an industrial computer window and operation buttons, and the operation buttons are used to control the pneumatic vibration source.

[0022] As a further implementation, the power chamber is used to set the intrinsically safe power supply and switching power supply of the power system, as well as the external power supply. All three power supplies can be introduced into the power chamber via a mining introduction device, and the mining introduction device has a built-in explosion-proof sealing ring.

[0023] As an optional implementation, the mine intrinsically safe geophone system includes multiple groups of mine intrinsically safe geophones, each group of mine intrinsically safe geophones includes multiple mine intrinsically safe geophones arranged side by side, and each mine intrinsically safe geophone is connected in parallel.

[0024] As an optional implementation, the mining intrinsically safe detector is a three-component acceleration sensor that synchronously collects vibration signals in three directions of space and is provided with a stainless steel housing.

[0025] As an optional implementation, the mine-use intrinsically safe pneumatic seismic source includes several mine-use intrinsically safe pneumatic seismic sources, each of which is connected in parallel. Each mine-use intrinsically safe pneumatic seismic source is equipped with a solenoid valve and a built-in mine-use intrinsically safe detector to provide a seismic source trigger signal for the detection host.

[0026] As an optional implementation, the industrial computer is connected to a wireless communication module to achieve wireless control, and the industrial computer is configured with a communication module to achieve real-time data transmission or remote control of the detection host.

[0027] The working method based on the above system includes the following steps:

[0028] In active source mode, the detection host controls the mine-used intrinsically safe pneumatic seismic source to impact the tunnel side wall to generate seismic waves. The mine-used intrinsically safe geophone picks up the vibration signal, and the detection host analyzes the unfavorable geology in front of the face.

[0029] In the passive source mode, the vibration signal generated by the mine TBM cutterhead during excavation is used as the source signal, and the mine intrinsically safe detector picks up the vibration signal to achieve detection while excavation.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The input signal of the mining intrinsically safe geophone of the present invention enters the signal acquisition system through the input isolation module, and the source control signal enters the pneumatic seismic source through the output isolation module. The industrial computer is directly connected to the signal acquisition system and the source control system to realize the acquisition of the geophone input signal and the control of the pneumatic seismic source.

[0032] The explosion-proof type of the mining geological advance detection instrument of the present invention adopts a flameproof and intrinsically safe type, which ensures explosion-proof capability while also ensuring the high performance of the instrument; the detection host supports a variety of coal mine working power supplies AC1140V, AC660V and AC127V, and no special power conversion device is required when installed.

[0033] The quick-opening door of the detection host in the present invention has a window adapted to the industrial computer, which not only ensures a good display effect, but also provides an inlet and outlet channel for the electromagnetic wave signal of the wireless module, thereby ensuring a good communication effect. In addition, the detection host is equipped with a switch handle with an interlocking power-off function. After the host is powered off, the quick-opening door can be opened, ensuring the safety of the instrument.

[0034] The mine-used intrinsically safe detector of the present invention adopts 4-20mA transmission signal, has good anti-interference performance, is small in size, and is easy to lay out and install.

[0035] The intrinsically safe pneumatic seismic source for mining in the present invention is safe and efficient, has large excitation energy and stable excitation frequency, and ensures the accuracy of detection results.

[0036] The instrument and detection method of the present invention support two detection modes, active source and passive source, and expand the application scenarios. Regardless of whether the TBM is excavating or not, it can detect unfavorable geology in front of the heading face.

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0039] Figure 1 The structure diagram of a mining TBM-mounted geological advance prediction system according to an embodiment;

[0040] FIG. 2( a ) and FIG. 2( b ) are respectively a front view and a rear view of a flameproof housing of an embodiment;

[0041] Figure 3 The following is a schematic diagram of the detection process of an embodiment. DETAILED DESCRIPTION

[0042] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0043] It should be noted that the following detailed descriptions are all illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0044] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0045] In the absence of conflict, the embodiments in this application and the features in the embodiments may be combined with each other.

[0046] Embodiment 1

[0047] A mine-used TBM-mounted geological advance prediction system includes a mine-used intrinsically safe detection host, a mine-used intrinsically safe geophone system and a mine-used intrinsically safe pneumatic seismic source, wherein:

[0048] The mine-used intrinsically safe detection host is used to generate and send a seismic source control signal to the mine-used intrinsically safe pneumatic seismic source to generate vibration, and realize geological advance prediction according to the vibration signal of the mine-used intrinsically safe detector system.

[0049] Among them, the mine explosion-proof and intrinsically safe detection host, such as Figure 1 As shown, it consists of a flameproof casing, an isolating switch, an isolating transformer, an intrinsically safe power supply, a switching power supply, an industrial computer, a signal acquisition system, a source control system, an input isolation module, an output isolation module and a wireless communication module.

[0050] The signal acquisition system is connected to the input isolation module, and the input isolation module is used to receive the vibration signal sent by the mining intrinsically safe detector system;

[0051] The power supply system includes an intrinsically safe power supply and a switching power supply, wherein the intrinsically safe power supply is used to provide electric energy for the intrinsically safe power supply modules in the input isolation module and the output isolation module, and the switching power supply is used to provide electric energy for the working power supplies in the input isolation module and the output isolation module;

[0052] The industrial computer is connected to the signal acquisition system and the seismic source control system to generate a seismic source control signal to the seismic source control system, obtain and analyze the vibration signal of the signal acquisition system, and perform geological advance prediction;

[0053] The seismic source control system is connected to the output isolation module and is used to send a seismic source control signal to the intrinsically safe pneumatic seismic source for mining.

[0054] The flameproof casing is made of carbon steel with a protection grade of IP54. As shown in FIG. 2(a) and FIG. 2(b), it is divided into four flameproof chambers: a power supply chamber, a transformer chamber, a flameproof main chamber, and an intrinsically safe signal chamber (A, B, C, and D in the figure are all independent chambers).

[0055] The mining working power supply generally includes AC1140V, AC660V and AC127V. All three power supplies can be introduced into the power supply chamber via a mining introduction device, and the mining introduction device has a built-in explosion-proof sealing ring.

[0056] The transformer chamber has an isolating switch and an isolating transformer built in. The isolating switch is connected to the switch handle. When the handle is in the horizontal power-off position, the anti-rotation screw is screwed in so that the quick-opening door can be moved to the right and opened, thereby preventing the handle from being manually closed again in the door-opening state. When the isolating switch handle is in the vertical power-supplying state, the handle and the quick-opening door are in a mechanically locked state, thereby preventing the quick-opening door from opening.

[0057] The quick-opening door is located in front of the flameproof main chamber and is connected by a hinge. The quick-opening door is designed with an industrial computer window and operation buttons, and the operation buttons are used to control the pneumatic vibration source.

[0058] The intrinsically safe power supply, switching power supply, industrial computer, signal acquisition system, source control system, input isolation module, output isolation module and wireless communication module are all located in the flameproof main chamber.

[0059] The external detector input signal and the pneumatic seismic source output signal are introduced into the intrinsically safe signal chamber via a mine introduction device, and the mine introduction device has a built-in explosion-proof sealing ring.

[0060] The mine-used intrinsically safe detector adopts a stainless steel housing, is compact and convenient to use.

[0061] The mine-used intrinsically safe detector is a current type sensor, and the transmission signal is 4-20mA.

[0062] The mine-used intrinsically safe detector is a three-component acceleration sensor that can synchronously collect vibration signals in three directions of space.

[0063] The mining intrinsically safe pneumatic seismic source uses compressed air as power, and uses a mining intrinsically safe solenoid valve as a control core.

[0064] The mine-used intrinsically safe pneumatic seismic source receives a control signal from a control host, and can excite seismic waves with large energy and stable frequency, thereby ensuring the accuracy of the detection result.

[0065] The mine-use intrinsically safe pneumatic seismic source has a built-in mine-use intrinsically safe geophone to provide a seismic source trigger signal for the detection host.

[0066] The wireless communication module supports Bluetooth, 2.4G and Wifi communications, and peripherals (such as a mining wireless keyboard) can control the industrial computer via Bluetooth or 2.4G.

[0067] The industrial computer can access the local area network via Wi-Fi to achieve real-time data transmission or remote control of the detection host.

[0068] The input signal of the detector enters the signal acquisition system through the input isolation module, and the source control signal enters the pneumatic source through the output isolation module. The industrial computer is directly connected to the signal acquisition system and the source control system to realize the acquisition of the detector input signal and the control of the pneumatic source.

[0069] Embodiment 2

[0070] A detection method of a system as provided in the first embodiment, such as Figure 3 As shown, the mine flameproof and intrinsically safe detection host and the mine intrinsically safe pneumatic seismic source are mounted on the mine TBM. When in use, the mine intrinsically safe detector is attached to the side wall of the tunnel through a coupling agent.

[0071] The present invention supports two detection modes: active source and passive source.

[0072] In active source mode, the detection host controls the mine-used intrinsically safe pneumatic seismic source to impact the tunnel side wall, generating seismic waves, and the mine-used intrinsically safe geophone picks up the vibration signal. This mode is used to detect unfavorable geology in front of the face when the mine TBM is shut down.

[0073] In the passive source mode, the vibration signal generated by the cutter head of the mining TBM is used as the source signal, and the mining intrinsically safe detector picks up the vibration signal. This is a detection mode of digging and detecting at the same time. This mode is used in mining TBM operations to detect unfavorable geology in front of the face.

[0074] Note: The figure only shows one detection method. Simply changing the number and position of pneumatic seismic sources and detectors cannot deviate from the scope of protection of the patent.

[0075] Taking the introduction of AC1140V power supply as an example, the working process is explained:

[0076] The external AC1140V power supply is introduced into the detection host from the power chamber. The quick-opening door is in the closed state. After the isolation switch is closed, the isolation transformer converts it into AC220V power supply to power the switch power supply and intrinsically safe power supply inside the host. The output voltage of the switch power supply and the intrinsically safe power supply are both DC24V. The switch power supply powers the industrial computer, signal acquisition system, source control system, input isolation module, output isolation module and wireless communication module, and the intrinsically safe power supply powers the external detector and pneumatic source. Use coupling agent to stick the detector on the side wall of the lane. Start the acquisition software installed on the industrial computer. If the active source mode is used, the pneumatic source is controlled to excite seismic waves, and multiple detectors synchronously pick up vibration signals and transmit them to the industrial computer; if the passive source mode is used, after starting the sampling, multiple detectors synchronously pick up vibration signals and transmit them to the industrial computer.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made by those skilled in the art within the spirit and principle of the present invention without creative labor shall be included in the protection scope of the present invention.

Claims

1. A TBM-mounted geological advance prediction system for mining, characterized in that: It includes the mine intrinsically safe detection host, mine intrinsically safe detector system and mine intrinsically safe pneumatic seismic source, among which: The mine intrinsically safe detection host is used to generate and send a seismic source control signal to the mine intrinsically safe pneumatic seismic source to generate vibration, and realize geological advance prediction according to the vibration signal of the mine intrinsically safe geophone system; The mine intrinsically safe detection host includes a power supply system, a signal acquisition system, an industrial computer, an input isolation module, an output isolation module and a source control system; The signal acquisition system is connected to the input isolation module, and the input isolation module is used to receive the vibration signal sent by the mining intrinsically safe detector system; The power supply system includes an intrinsically safe power supply and a switching power supply, wherein the intrinsically safe power supply is used to provide electric energy for the intrinsically safe power supply modules in the input isolation module and the output isolation module, and the switching power supply is used to provide electric energy for the working power supplies in the input isolation module and the output isolation module; The industrial computer is connected to the signal acquisition system and the seismic source control system to generate a seismic source control signal to the seismic source control system, obtain and analyze the vibration signal of the signal acquisition system, and perform geological advance prediction; The seismic source control system is connected to the output isolation module and is used to send a seismic source control signal to the intrinsically safe pneumatic seismic source for mining.

2. A mining TBM-mounted geological advance prediction system as claimed in claim 1, characterized in that: The intrinsically safe power supply and the switching power supply are connected to an external power supply, and the external power supply is connected to the intrinsically safe power supply and the switching power supply through a protection circuit, an isolation switch and an isolation transformer.

3. A mining TBM-mounted geological advance prediction system as claimed in claim 1 or 2, characterized in that: It also includes a flameproof shell, which includes four flameproof chambers: a power supply chamber, a transformer chamber, a flameproof main chamber and an intrinsically safe signal chamber, wherein the power supply chamber is used to set up a power supply system, the transformer chamber is used to set up an isolating switch and an isolation transformer, and the flameproof main chamber is used to set up a signal acquisition system, an industrial computer, an input isolation module, an output isolation module and a seismic source control system; the external detector input signal and the pneumatic seismic source output signal are introduced into the intrinsically safe signal chamber via a mining introduction device.

4. A mining TBM-mounted geological advance prediction system as claimed in claim 3, characterized in that: The flameproof housing is made of carbon steel; Or, the flameproof housing is provided with a quick-opening door, the isolating switch is connected to the switch handle, when the switch handle is in the power-off position, the quick-opening door can be opened by screwing in the anti-rotation screw, and when the switch handle is in the power-on state, the handle and the quick-opening door are in a mechanical locking state to prevent the quick-opening door from opening; The quick-opening door is located in front of the flameproof main chamber and is connected by a hinge. The quick-opening door is provided with an industrial computer window and operation buttons, and the operation buttons are used to control the pneumatic vibration source.

5. The mining TBM-mounted geological advance prediction system as claimed in claim 3 is characterized in that: The power supply chamber is used to set the intrinsically safe power supply and switching power supply of the power supply system, as well as the external power supply. All three power supplies can be introduced into the power supply chamber through a mining introduction device, and the mining introduction device has a built-in explosion-proof sealing ring.

6. The mining TBM-mounted geological advance prediction system according to claim 1, characterized in that: The mine intrinsically safe geophone system comprises a plurality of groups of mine intrinsically safe geophones, each group of mine intrinsically safe geophones comprises a plurality of mine intrinsically safe geophones arranged side by side, and each mine intrinsically safe geophone is connected in parallel.

7. The mining TBM-mounted geological advance prediction system according to claim 1 is characterized in that: The mine-used intrinsically safe detector is a three-component acceleration sensor that synchronously collects vibration signals in three directions of space and is provided with a stainless steel housing.

8. The mining TBM-mounted geological advance prediction system according to claim 1 is characterized in that: The mine-use intrinsically safe pneumatic seismic sources include several ones, each of which is connected in parallel. Each mine-use intrinsically safe pneumatic seismic source is equipped with a solenoid valve and a built-in mine-use intrinsically safe detector to provide a seismic source trigger signal for the detection host.

9. The mining TBM-mounted geological advance prediction system according to claim 1, characterized in that: The industrial computer is connected with a wireless communication module to realize wireless control, and the industrial computer is configured with a communication module to realize real-time transmission of data or remote control of the detection host.

10. A working method based on the system according to any one of claims 1 to 9, characterized in that: The following steps are involved: In the active source mode, the detection host controls the mine-used intrinsically safe pneumatic seismic source to impact the side wall of the tunnel to generate seismic waves. The mine-used intrinsically safe geophone picks up the vibration signal, and the detection host analyzes the unfavorable geology in front of the face. In the passive source mode, the vibration signal generated by the mine TBM cutterhead during excavation is used as the source signal, and the mine intrinsically safe detector picks up the vibration signal to achieve detection while excavation.

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