A method for synchronously triggering 428XL by seismic detector and synchronous triggering device of seismic detector

Abstract

The present invention relates to the field of seismic detectors, and in particular to a method for synchronously triggering 428XL of seismic detectors and a synchronous triggering device of the detector. In the Explo‑IMPULSIVE menu window, the equipment type and ID number in the Operation explosion processing type are changed, the trigger port is changed from LCI to Laux, and the specific equipment number in the field operation is input; the length of the TB time window is lengthened; the P and N contacts of Laux_428 are led out with a small wire connected to a detector with a fixed tap, and the detector is buried in the blasting wellhead. After the explosion preparation is completed, the blaster notifies the instrument, and the instrument operator clicks the trigger command and notifies the blaster; the on-site personnel ignite the explosive product fuse, and the underground detector is excited by the explosion center to generate a starting electrical signal, which is uploaded to Laux via the PN lead, and the return instrument starts synchronous acquisition. The present invention is a synchronous triggering method that does not require electric detonators and shaped explosives, can use the explosion center detector signal to synchronously trigger instrument acquisition, and is simple to operate on site.

Description

Technical Field

[0001] The present invention relates to the technical field of seismic geophones, and in particular to a method for synchronously triggering 428XL of a seismic geophone and a geophone synchronous triggering device. Background Art

[0002] Conventional synchronous triggering is usually performed by the encoder, radio and explosive unit with instructions provided by the instrument. However, in actual seismic acquisition operations, there may be various unpredictable difficulties in communication, topography, and the application and approval of formed explosives.

[0003] Due to many reasons such as communication and terrain, there are some dead spots and difficulties in seismic high-altitude operations that cannot be overcome by conventional explosive units. The current safety approval of explosives is becoming increasingly strict, time-consuming and costly. Therefore, it is urgent to realize a synchronous triggering method that does not require electric detonators and shaped explosives to solve the above problems. At the same time, in some areas of seismic operations, the target layer is shallow and the actual required blasting volume is small, so other source methods can be used to replace traditional shaped explosives. Therefore, it is necessary to consider a synchronous triggering method that does not require electric detonators and shaped explosives to solve the above problems.

[0004] In current seismic acquisition operations, a professional decoding system is usually used, and electric detonators are required to detonate shaped explosives. The process is completely dependent on radio station communication and the instructions of the encoder. The specific steps (taking 428XL as an example) are: 1. The operator issues an ignition command Go to activate the acquisition arrangement; 2. After the arrangement is activated, the ignition signal FO (Fire Order) is generated by the Blaster port MN of the LCI. After the encoder confirms the ignition command, a TB signal is generated and transmitted back by LK to the Blaster input instrument to activate synchronous acquisition. At the same time, FO is transmitted from the decoder by the radio to start the instantaneous discharge of the explosion port. In this process, for the purpose of synchronization, it is required that the detonator is preferably an instantaneous detonator. If the detonator is sometimes disconnected, the delay time of all detonators in the mining area must be consistent. At the same time, the radio communication in the mining area is in good condition, the wireless relay delay time is consistent, and it cannot exceed one sampling interval. Both conditions are indispensable. However, in the field acquisition on the spot, the mining area is high and densely forested, there are many radio station blind spots, or the approval procedures for detonators and explosives are complicated. In addition, the terrain is complex, and the source vehicle cannot operate. This requires exploring other triggering methods to complete earthquake tasks. Summary of the invention

[0005] The object of the present invention is to provide a method for synchronously triggering 428XL of a seismic detector and a synchronous triggering device of a seismic detector, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A method for synchronously triggering 428XL by a seismic detector comprises the following steps:

[0008] Step 1: In the Explo-IMPULSIVE menu window, change the equipment type and ID number in the Operation explosive treatment type, change the trigger port from LCI to Laux, and enter the specific equipment number in the field operation;

[0009] Step 2: Lengthen the length of the TB time window;

[0010] Step 3: Lead out the P and N contacts of Laux_428 with a fixed tapped small wire connected to a detector. The detector is buried at the blasting wellhead. After the blasting preparation is completed, the blaster notifies the instrument.

[0011] Step 4: After the instrument determines that the explosion preparation is complete, click the trigger command go and notify the blaster at the same time;

[0012] Step 5: On-site personnel ignite the explosive fuse, and the underground detector is stimulated by the explosion center to generate a starting electrical signal, which is uploaded to Laux via the PN lead and the return instrument starts synchronous collection.

[0013] Furthermore, in step 2, the length of the TB time window is lengthened to ensure that the ignition and blasting time of the blasting source is within the TB window of the instrument.

[0014] Furthermore, the TB time window length is extended to 20000-30000ms.

[0015] Furthermore, in step 3, any connected collection chain near the blast point is interrupted on site, and the Laux specified in the explosion treatment type menu is connected to it, and the power supply small battery is turned on to ensure that the power supply is normal, ensuring that the collection chain and Laux are in good contact.

[0016] Furthermore, in step 3, the blaster notifies the instrument using a walkie-talkie, a mobile phone or a tablet computer.

[0017] To achieve the above object, the present invention also provides the following technical solutions:

[0018] A detector synchronous trigger device includes a fixed tap, which is connected to the detector through a double-strand wire. The fixed tap includes a plug, one end of the plug is provided with a convex metal pin groove, a metal pin sheet is installed in the metal pin groove, and one end of the double-strand wire is respectively connected to the top of the metal pin sheet.

[0019] Furthermore, it also includes a permanent magnet located in the metal pin slot.

[0020] Furthermore, the permanent magnet is a ring-shaped magnet, and the ring-shaped magnet is arranged at the bottom of the metal pin sheet.

[0021] Furthermore, the permanent magnets are in an arc shape, in an array, and are evenly embedded on the circumference of the metal pin sheet.

[0022] Furthermore, the plug is a rubber plug.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention is a synchronous triggering method without electric detonators and shaped explosives. This method uses the explosion center detector signal to synchronously trigger the instrument collection, and the matching one-time forming design device. The on-site operation is simple, and there is no need for the participation and operation restrictions of the encoder and the radio station. The synchronous triggering can be completed by only using the layout of the existing normal survey line. The matching device is light in weight, occupies a small area, is simple and easy to carry, and has a low manufacturing cost (the cost of a single 60 Hz detector and a 100-meter 0.5 square millimeter double-strand wire is less than 100 yuan). It has positive significance for shallow earthquakes under complex terrain, and can be effectively extended to heavy hammers, pile foundation detection or other ground excitation methods (such as electric spark sources, there is currently no mature and stable encoder compatible with it in the industry. The hydroelectric effect based on electric spark excitation is also conducive to the layout and protection of the detector in the well). At the same time, the dual-port access design of the new connector can also be equivalently expanded and applied to mountainous areas or dense forests where regular shaped explosives have been obtained but the communication signal is not smooth. Or experimental preparation work before mining operations. Before the formal blasting procedures are completed, relevant information on the mining area and construction parameters should be understood to facilitate construction.

[0025] The detector synchronous trigger device of the present invention can firmly fix the two PN contacts (copper pins) of the XDEV2 port with the metal pin sheet when the two adjacent contacts (such as PN) are adapted and plugged in, thereby improving the firmness of the plug-in connection with the XDEV2 port. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is the wiring diagram of the XDEV2 port of Laux-428 (the two NP points provide TB input signals for the instrument).

[0027] Figure 2 A schematic diagram of the types and numbers of trigger devices configured for the present invention.

[0028] Figure 3 This is a schematic diagram of extending the TB time window length in the present invention.

[0029] Figure 4 It is a schematic diagram of the plug of the trigger device of the present invention being plugged into the XDEV2 port.

[0030] Figure 5This is a schematic perspective plan view of the plug of Embodiment 1 of the present invention.

[0031] Figure 6 This is a schematic perspective plan view of a plug according to Embodiment 2 of the present invention.

[0032] Figure 7 For the present invention Figure 6 Schematic diagram of the position of the metal pin and the permanent magnet.

[0033] Figure 8 This is a schematic perspective plan view of a plug according to Embodiment 3 of the present invention.

[0034] Fig. 9 For the present invention Figure 8 Schematic diagram of the position of the metal pin and the permanent magnet.

[0035] Fig.10 For the present invention Figure 8 Specific size diagram.

[0036] Fig.11 This is a schematic diagram of the front perspective view (including specific dimensions) of the plug of the present invention.

[0037] Fig.12 This is an example diagram of seismic data of underground space engineering in a certain area according to the present invention.

[0038] In the figure: 1-plug, 2-metal pin slot, 3-metal pin sheet, 4-permanent magnet, 5-two-strand wire, 6-detector, 7-XDEV2 port. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be noted that the terms "upper / lower end", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "setting / sleeving", "sleeve connection", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Example 1

[0043] See also Figure 1-11 , the present invention provides a technical solution:

[0044] A method for synchronously triggering 428XL by a seismic detector. Using the XDEV2 (external device interface 2) interface provided by the 428XL cross station (Laux-428), a method for synchronous triggering by a seismic detector is explored: in the Explo-IMPULSIVE menu window of 428XLopration, the two PN contacts of the XDEV2 port of Laux are used as TB signal inputs, the operating survey line acquisition chain is used as the transmission line, and non-shaped explosives such as firecrackers and gunpowder are used as explosion sources to excite seismic waves and obtain synchronous triggering. (This method is also suitable for the 408XL system. For the convenience of discussion, it is referred to as 428XL.) Fig.12 As shown in the figure, this method was successfully applied to suburban mountain operations in a certain city underground space exploration project from May to June 2019, and the data processing and interpretation showed good results. In a certain city underground space operation completed from May to June 2019, due to the hilly area in part of the area, the trees are deep and dense, and the original source operation could not be carried out. The target layer of the mining area is relatively shallow, and the excitation energy requirement is not high. After relevant trial work, the TB input port N, P provided by the XDEV2 end of Laux-428 was finally used. Figure 1 As shown, the instrument is started by introducing a downhole geophone and utilizing the instantaneous current of the downhole (wellhead) geophone at the moment of explosion to complete synchronous acquisition.

[0045] The method of the present invention is essentially a wired blasting, but the advantage is that it does not require the additional laying of separate blasting wires, does not require electric detonators to start, and does not require the participation of radio stations and encoders. It only relies on the ready-made acquisition chain on the survey line for wired transmission, and only needs a small battery to ensure that Laux can replace the blaster for mobile operations. It is light and simple. The XDEV2 port of Laux is the LSI (wired blasting) encoder interface provided by Sercel for field acquisition, which is used to solve operations under unfavorable conditions such as communication difficulties.

[0046] Specifically, the operation steps of synchronous triggering of the seismic detector are as follows:

[0047] The XDEV2 port of Laux is the LSI (wired blasting) encoder interface provided by Sercel for field acquisition, which is used to solve operations under unfavorable conditions such as communication difficulties. Observe the signal distribution of the XDEV2 interface— Figure 1 It can be seen that the two contacts NP in the figure are the TB signal input terminals. In other words, if the first time-interrupted signal can be provided to the TB signal input port at the same time as the source blasting, the synchronous acquisition of the instrument can be triggered. The specific steps are as follows:

[0048] S1: In the Explo-IMPULSIVE menu window, the operator changes the equipment type and ID number in the Operation explosive treatment type, changes the trigger port from LCI to Laux, and enters the specific equipment number in the field operation, such as Figure 2 .

[0049] S2: Lengthen the length of the TB time window, such as extending it to 20000-30000ms. Figure 3 The purpose of lengthening the TB time window is to ensure that the ignition and explosion time of the blasting source is within the TB window of the instrument.

[0050] S3: On-site interruption of any connected acquisition chain near the blast point, linking the Laux specified in the explosion treatment type menu to it, connecting the power supply small battery, confirming that the power supply is normal, and ensuring that the acquisition chain and Laux are in good contact. Figure 3 ) is led out with a small wire with a fixed tap connected to a detector, the detector is buried at the blasting wellhead, and the blaster notifies the instrument (the method is not limited, it can be walkie-talkie, mobile phone, WeChat).

[0051] S4: After the instrument operator confirms that the explosion preparation is complete, he clicks the trigger command go and notifies the blaster at the same time. 5: The on-site personnel ignite the explosive fuse, and the underground detector is stimulated by the explosion center to generate a starting electrical signal, which is uploaded to Laux via the PN lead, and the return instrument starts synchronous acquisition. The synchronous vibration of the underground detector is a key link in this process, which requires strong sensitivity and certain anti-interference ability. Under the condition of keeping vigilance at the operation site, qualified 60-100 Hz detectors can complete this triggering work well. Placing the detector underground at a certain depth and ensuring that it is not damaged or interrupted by the underground explosion requires rigidity protection for the detector, which has certain operational difficulties. However, if the site does not require high well depth, and micro-well logging proves that the surface velocity changes in the mining area are orderly, the detector can also be arranged at the wellhead. When processing the data, the relevant conversion is performed based on the surface velocity data to determine the precise start time of the physical point.

[0052] Practice has proved that this method is particularly suitable for shallow earthquakes under complex terrain conditions. It was put into field use for two months in a suburban underground space survey conducted from May to June 2019, and the field operation and subsequent data processing and interpretation showed good results. Fig.12 As shown, the work efficiency was improved and the work coverage of the entire area was completed as scheduled.

[0053] Scope of application:

[0054] Field operations are often mountainous and long, and effective communication between the source vehicle and the instrument vehicle is a problem. So can this method also be used to use the ground detector to directly receive the self-initiated vibration of the source vehicle and reversely trigger the instrument to achieve synchronous acquisition? The answer is no. The source vehicle can self-initiate vibrations to excite seismic waves, but in the source mode, the effective seismic information collected by the instrument each time must be output by the encoder as a true reference signal, which is used as the basis for the correlation and superposition of each segment of data. Without the output of the true reference signal, data correlation cannot be completed. Therefore, this method cannot be applied to source operations and is only suitable for well blasting.

[0055] The present invention designs a molded detector synchronization trigger device according to the positive surface size of the XDEV2 (external device interface) port of Laux-428. The XDEV2 port 7 is a 16-pin metal pin that can provide multiple input and output signals. Figure 1 As shown. According to actual measurements, the dimensions of each pair of signal input (output) interfaces are exactly the same, and the distance between the two signal lines of each pair of available signal interfaces is equal. Among them, the centers of the two copper needles (metal pins) of each pair of signal interfaces are 0.5 cm apart, the diameter of the copper needle circle is 0.2 cm, the diameter of the rubber base (not shown) fixed under the copper needle is 0.3 cm, and the distance between two adjacent rubber bases is 0.2 cm. This one-time formed concave plug is directly connected to a 60 Hz dynamic coil detector 6, molded, and the lead wire is a 0.5 square millimeter double-strand flat 5-line wire with a length of 60-100 meters. Based on the above dimensions, we made the following Figure 10-11 Sample design.

[0056] Example 2

[0057] In the detector synchronous trigger device of the present invention, considering the convenience and firmness of field construction, please refer to Figure 6-7 The present invention provides a technical solution, which is basically the same as the embodiment 1, except that it also includes a permanent magnet 4 located in the metal pin slot 2, the permanent magnet 4 is an annular magnet, and the annular magnet is arranged at the bottom of the metal pin sheet 3. By setting the annular magnet, Figure 4In the state shown, when the plug 1 is plugged into the XDEV2 port 7: that is, when the adjacent two contacts (copper pins) of the XDEV2 port 7, such as PN, are adapted and plugged into the metal pin sheet, the two PN contacts can be firmly fixed to the metal pin sheet, thereby improving the firmness of the plug-in.

[0058] Example 3

[0059] See also Figure 8-9 The present invention provides a technical solution, which is basically the same as that of Example 2, except that: the permanent magnet 4 is in an arc shape, in an array, and is evenly embedded on the circumference of the metal pin sheet 3. In this embodiment, the arc-shaped permanent magnets 4 are preferably 2 or 3 groups. When the adjacent two contacts (copper pins) of the XDEV2 port 7, such as PN, are adapted and plugged with the metal pin sheet, the two PN contacts can be firmly fixed with the metal pin sheet, which also improves the firmness of the plug-in. Compared with Example 2, the permanent magnet 4 is located inside the rubber plug and is more concealed.

[0060] This design of the detector synchronization trigger device of the present invention can also be extended to the connection of other signal interfaces (because the sizes of the signal interfaces in the XDVE2 port 7 are exactly the same), such as the LM end is the ignition signal output port, and the RS end is the reference signal output port, and similar one-time molding interfaces can be made, in order to provide a more novel and convenient method for the flexible collection of field data. Compared with a complete 16-pin XDEV2 port finished product design, this two-pin plug design has low manufacturing cost, simple and quick on-site operation, better firmness of plug-in, and simpler manufacturing process and production process. Taking the above points into consideration, we believe that this two-pin interface plug is more suitable for earthquake field operation and its cost is lower.

[0061] The present invention explores a synchronous excitation method that is different from LSI but more convenient and reliable through the Laux XDEV2 interface of the 428XL acquisition system. In order to achieve the convenience of field production, a molded interface plug that matches the triggering method provided in this article is designed. And according to the actual size measurement, the following is provided: Figure 10-11 The main caliber data.

[0062] The present invention is a synchronous triggering method without electric detonators and shaped explosives. This method uses the explosion center detector signal to synchronously trigger the instrument collection, and the matching one-time forming design device. The on-site operation is simple, and there is no need for the participation and operation restrictions of the encoder and the radio station. The synchronous triggering can be completed by only using the layout of the existing normal survey line. The matching device is light in weight, occupies a small area, is simple and easy to carry, and has a low manufacturing cost (the cost of a single 60 Hz detector and a 100-meter 0.5 square millimeter double-strand wire is less than 100 yuan). It has positive significance for shallow earthquakes under complex terrain, and can be effectively extended to heavy hammers, pile foundation detection or other ground excitation methods (such as electric spark sources, there is currently no mature and stable encoder compatible with it in the industry. The hydroelectric effect based on electric spark excitation is also conducive to the layout and protection of the detector in the well). At the same time, the dual-port access design of the new connector can also be equivalently expanded and applied to mountainous areas or dense forests where regular shaped explosives have been obtained but the communication signal is not smooth. Or experimental preparation work before mining operations. Before the formal blasting procedures are completed, relevant information on the mining area and construction parameters should be understood to facilitate construction.

[0063] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for synchronously triggering 428XL by a seismic detector, characterized in that: The steps include: Step 1: In the Explo-IMPULSIVE menu window, change the equipment type and ID number in the Operation explosive treatment type, change the trigger port from LCI to Laux, and enter the specific equipment number in the field operation; Step 2: Lengthen the length of the TB time window; Step 3: Lead out the P and N contacts of Laux_428 with a fixed tapped small wire connected to a detector. The detector is buried at the blasting wellhead. After the blasting preparation is completed, the blaster notifies the instrument. Step 4: After the instrument determines that the explosion preparation is complete, click the trigger command go and notify the blaster at the same time; Step 5: On-site personnel ignite the explosive fuse, and the underground detector is stimulated by the explosion center to generate a starting electrical signal, which is uploaded to Laux via the PN lead and returned to the instrument to start synchronous collection.

2. A method for synchronously triggering 428XL with a seismic detector according to claim 1, characterized in that: In step 2, the TB time window length is lengthened to ensure that the ignition and blasting time of the blasting source is within the TB window of the instrument.

3. A method for synchronously triggering 428XL by a seismic detector according to claim 2, characterized in that: Extend the TB time window to 20000-30000ms.

4. A method for synchronously triggering 428XL of a seismic detector according to claim 1, characterized in that: In step 3, interrupt any connected acquisition chain near the blast point on site, connect the Laux specified in the explosion treatment type menu to it, connect the power supply small battery, make sure the power supply is normal, and ensure that the acquisition chain and Laux are in good contact.

5. A method for synchronously triggering 428XL by a seismic detector according to claim 1, characterized in that: In step 3, the blaster notifies the instrument using a walkie-talkie, mobile phone or tablet computer.

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