CN111766633A - Recyclable direct-current electrical method electrode installation device in long drill hole and sectional monitoring method - Google Patents
Recyclable direct-current electrical method electrode installation device in long drill hole and sectional monitoring method Download PDFInfo
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- CN111766633A CN111766633A CN202010739111.XA CN202010739111A CN111766633A CN 111766633 A CN111766633 A CN 111766633A CN 202010739111 A CN202010739111 A CN 202010739111A CN 111766633 A CN111766633 A CN 111766633A
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- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/18—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging
- G01V3/20—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with propagation of electric current
- G01V3/22—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with propagation of electric current using dc
Abstract
The invention discloses a recyclable direct current method electrode installation device in a long drilled hole and a segmented monitoring method. During monitoring, the number of segments, the number of monitoring segments and the electrode distance are determined according to the length of a drill hole, a plurality of electrode carrying modules are connected with a push pipe one by one and matched with a drill to continuously push the electrodes into the hole, the electrodes are pushed to the position of a target measuring point, a multi-core cable is connected with an electric method host machine, the electric method host machine is inflated into the pipe, an electric method instrument is started, and data acquisition of the target measuring point is carried out; and then the air pressure in the pipe is removed, the device is pushed to the position of the next section of measuring point, and the data of each section of measuring point is integrated to realize the electrical monitoring of the whole hole section of the long drill hole. The device is simple to operate and can be repeatedly used.
Description
Technical Field
The invention relates to a direct current method integrated electrode cable installation device and a direct current method monitoring method, in particular to a recoverable direct current method electrode installation device in a long drilled hole and a sectional monitoring method, and belongs to the technical field of engineering geophysical exploration.
Background
In recent years, with the rapid development of coal mine directional drilling technology and equipment, long-distance drilling is widely applied to the aspects of monitoring of underground water-containing structures and gas abnormal areas of coal mines in China, and prevention and control of dynamic disasters such as water inrush, rock burst, coal and gas outburst and the like. The maximum distance of the underground long drill hole of the coal mine reaches more than 2000 meters, the hole forming length of the long drill hole of the existing mine is continuously increased, and an important technical approach is provided for remote advanced water exploration and gas exploration of the mine.
Although the directional drilling technology of long-distance long drill holes in coal mines is greatly developed, the reliability of the result of detecting gas by water by using the long-distance long drill hole drilling method is higher, the construction period of a single long drill hole is long, and the cost is high; under the influence of time cost, economic cost, engineering quantity and the like, the long drill holes cannot completely and continuously cover the monitoring area, and only limited points can be selected to arrange the drill holes in the monitoring area; if the long drilling holes are distributed too much, great resource waste can be caused; if the long drill hole is distributed too little, it is inferred that the front geological abnormal area has great limitation. The drilling result based on the long drill hole can only reflect the geological abnormal condition of a single point of the drill hole and can not effectively reflect the geological abnormal condition outside the drill hole.
The direct current method is a geophysical monitoring technology with wide application, and is better applied to monitoring water-containing structures of coal mines and abnormal gas areas. If the direct current method geophysical prospecting technology and the long-distance drilling technology can be combined, the long-distance drill hole is used as the arrangement space of the direct current method electrodes, the effective monitoring range of the drill hole is enlarged by utilizing the direct current method technology in the drill hole, the unknown geological abnormal structures such as the water containing/guiding belt and the gas containing abnormal area beside the hole are accurately determined, one hole of the long drill hole can be multipurpose, the control range of the long drill hole detection monitoring is expanded, the comprehensive utilization value of the long drill hole is greatly improved, and effective guarantee is provided for safe and efficient mining of a coal mine.
At present, the direct current method testing device is generally arranged in a space of an underground roadway, for example, one electrode measuring line is arranged in the underground roadway or two electrode measuring lines are arranged in two adjacent roadways. Due to the limitations of dc test equipment, particularly the placement of electrode cables, it is difficult to place dc electrodes directly in long boreholes. Firstly, the electrode is easy to block in the movement of entering the drill hole, and the electrode is difficult to be sent into the drill hole, particularly a long drill hole; secondly, after the electrode enters the designated position of the drill hole, if the electrode is not processed, the electrode is difficult to form good coupling contact with the hole wall, so that power supply and acquisition signals are poor, and even signals cannot be acquired. In recent years, an attempt to arrange electrodes in a borehole is made, for example, by binding an electrode cable (flexible cable) and a grouting hose on a PVC pipe, and manually pushing the bound PVC pipe, electrode cable and grouting hose into the borehole, after the electrodes enter the designed position of the borehole, the whole borehole must be grouted with cement mortar, so as to ensure good contact between the electrodes and the borehole wall. The method is limited by the number of electrodes, is difficult to be applied to direct current method monitoring in long drill holes due to large manual pushing difficulty and the like, and when the length of the drill hole exceeds 100 meters, the electrodes are difficult to be pushed into the drill hole only by manpower; in addition, in the method, grouting is performed after the electrode enters the specified drilling position, and the electrode cable can be used only once, so that the loss of the electrode cable is large, and the flexibility is poor; and the drilling which consumes a large amount of manpower, material resources and financial resources can not be used for other purposes after grouting, and one hole can not be used for multiple purposes, so that the use efficiency of the drilling is low.
In recent years, researchers at home and abroad develop researches on mounting of electrodes in holes and monitoring of direct current method in holes, for example, chinese patent CN2015861914U discloses a hole power supply electrode for a well direct current method, which can make a conductive leaf plate retract against the elastic force of a supporting spring by electrifying an electromagnet, thereby realizing the lifting movement of the electrode in a drilling well; but the device has a complex structure, and can work only by electrifying, on one hand, the repeated use can cause the damage of the spring, thereby the electrode can not be in good contact with the well wall, and more importantly, the device can not be applied to the special operation environment with high explosion-proof requirement under the coal mine; in addition, when the device is used for long-distance monitoring, the quality of the device is increased due to the existence of the electromagnet, and manual operation is inconvenient.
Disclosure of Invention
The invention aims to provide a recyclable direct current method electrode mounting device in a long drill hole, which can realize good coupling of an electrode and a hole wall in the drill hole, recycle the electrode and position and push the electrode.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a recoverable direct current electrical method electrode installation device in a long drill hole comprises a pushing pipe, an electrode carrying module and a multi-core cable;
the pushing pipe is a hollow rigid insulating pipe, and two ends of the pushing pipe are respectively provided with an internal thread and an external thread; the electrode carrying module comprises a one-way expander, an electrode plate, an elastic centralizer and a wire binding belt, the one-way expander comprises a one-way pipe, an expansion capsule and two capsule rings, the expansion capsule is sealed at the middle position of the outer side of the one-way pipe by the two capsule rings, the one-way pipe is a hollow rigid insulating pipe, two ends of the one-way pipe are respectively provided with an internal thread and an external thread which are matched with the pushing pipe, and the middle position of the one-way pipe is provided with a through hole which is communicated with the inside of the expansion capsule; the elastic centralizers are symmetrically arranged at two sides of the expansion capsule, the electrode plates are adhered to the central position of the outer side of the expansion capsule, the single-way pipe is provided with a wire hole and a sealing wire plug at the side of the expansion capsule, and the sealing wire plug is screwed into the wire hole to realize the air sealing of the wire hole; the multi-core cable is inserted into the single-circuit tube, the double-core lead is drawn out from the lead hole to be connected with the electrode plate, and the binding tape binds the double-core lead outside the single-circuit expander.
Preferably, the multi-core cable is sealed in the pushing pipe and the single-path pipe and penetrates through the cable buckle, and the cable buckle is clamped at the joint of the inner thread end and the outer thread end.
Preferably, a first sealing washer is arranged between the cable fastener and the inner thread end of the pushing pipe or the single-way pipe, and a second sealing washer is arranged between the cable fastener and the outer thread end of the pushing pipe or the single-way pipe, so that air-tight sealing among the pushing pipes, among the single-way pipes and among the pushing pipes and the single-way pipe is realized.
Preferably, the external thread end of the single-way pipe and/or the pushing pipe is connected with the sealing plug, and the internal thread end of the single-way pipe and/or the pushing pipe is connected with the sealing conversion interface.
Preferably, the sealing plug is semicircular or conical, the sealing conversion interface is provided with a cable hole, an air injection hole and a pressure release valve, the multi-core cable penetrates out of the cable hole to be connected with the electric host, the wind pressure pump is connected with the air injection hole through a high-pressure gas pipe, and the sealing plug and the sealing conversion interface realize the air seal at two ends of the device.
Preferably, the length of each section of the multi-core cable is equal to that of each section of measuring line of the direct current method subsection monitoring mode in the long drilling hole, and therefore the instrument can be conveniently disassembled and assembled and the depth of the hole can be conveniently calculated.
The second objective of the present invention is to provide a recyclable DC method for sectional monitoring in a long borehole, which is simple in operation.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a recoverable direct current method electrode installation and subsection monitoring method in long drilling is provided, which adopts the electrode installation method and the subsection monitoring method of the long drilling electrode device and mainly comprises the following steps:
(a) drilling a long drill hole with a specific length according to the monitoring range, determining the length of a measuring line, the distance between measuring points, the number of electrodes and the segmented monitoring times of each section of the long drill hole monitored by a direct current method according to the total length of the long drill hole, and selecting a forward or backward segmented monitoring mode;
(b) one end of a multi-core cable penetrates through the internal thread end of the first single-way pipe, a double-core lead corresponding to the first electrode carrying module in the multi-core cable is led out from a lead hole and is connected with an electrode plate, the double-core lead is bound on the outer side of a single-way expander by using a wire binding belt, the lead hole is blocked by using a sealing plug, the external thread end of the single-way expander is connected with a sealing plug to realize air seal at the port, and elastic centralizers are arranged on two sides of an expansion capsule;
(c) according to the measuring point distance, the other end of the multi-core cable is sequentially penetrated from the external thread end of the electrode carrying module or the pushing pipe, the electrode carrying module or the pushing pipe is numbered, and a cable buckle and two sealing gaskets are arranged at the connection position of the internal thread and the external thread; then leading out the double-core lead corresponding to each electrode carrying module in the multi-core cable from a lead hole on the single-way pipe in sequence, connecting the double-core lead with the corresponding electrode plate, tightly plugging the lead hole by using a sealing wire plug, and binding the double-core lead to the outer side of the single-way expander by using a binding tape; then the push pipe and the one-way expander are sequentially connected, and elastic centralizers are arranged on two sides of each expansion capsule;
(d) sequentially pushing the installed one-way expander and the pushing pipe into the long drill hole, and synchronously carrying out installation and pushing until the electrode is pushed to a target measuring point position, and recording the measuring point position of the electrode in the long drill hole;
(e) after the pushing pipe pushes all the electrodes to a set position in the long drill hole, connecting the internal thread end of the pushing pipe positioned at the hole opening position with a sealing conversion interface, connecting the multi-core cable with an electrical method host machine after penetrating the multi-core cable through a cable hole, and simultaneously sealing the conversion interface to realize the air sealing of the internal thread end;
(f) connecting a high-pressure-resistant air pipe with the gas injection hole and the high-pressure air pressure pump, starting the high-pressure air pressure pump, injecting high-pressure gas into the pushing pipe and the single-way expander, and expanding the expansion capsule under the action of the high-pressure gas so as to well couple the electrode plate with the wall of the drilled hole;
(g) starting a direct current method instrument, and acquiring direct current method data in the drill hole; during the monitoring period by the direct current electrical method, the high-pressure wind pressure pump is in a working state, so that the gas in the pushing pipe and the pipeline of the one-way expander is kept in a high-pressure constant-pressure state, and the expansion capsule is always in an expansion state;
(h) after the monitoring data acquisition by the first-stage direct current method is finished, closing the high-pressure air pump, and opening a pressure relief valve to relieve the pressure of high-pressure gas in the pipeline; then disconnecting the multi-core cable from the electrical host, and disconnecting the high-pressure air pipe from the air pressure pump; continuing to connect the pushing pipe and the multi-core cable, so as to push the electrode in the drill hole into the position of the next section of measuring point; or sequentially withdrawing and removing the pushing pipe and the multi-core cable until the electrode in the drill hole retreats to reach the position of the next section of measuring point;
(i) according to the direct current method monitoring scheme in the on-site drilling, repeating the steps d to h in the same mode, sequentially completing data acquisition of each section of measuring line, and finally completing direct current method monitoring in the whole long drilling hole in a sectional monitoring mode;
(j) after the whole long drilling monitoring is finished, the multi-core cable, the electrode carrying module and the pushing pipe are recycled in a classified mode, mathematical fitting processing is carried out on the direct current method monitoring result of each section of measuring line in the drilling hole, and finally a continuous monitoring result of the whole long drilling hole is formed.
Compared with the prior art, the invention has the following beneficial effects:
1. the whole section type monitoring can be realized for short drilling holes. The method is particularly suitable for direct current method monitoring in long drill holes, and the recyclable electrode mounting device and the segmented monitoring method can be used for carrying out segmented direct current method monitoring on the long drill holes, so that direct current method monitoring of the whole long drill holes is finally realized.
2. By utilizing the direct current electrode installation device with the recoverable holes, the electrodes, the cables and the push pipes in the holes can be recycled, so that the use efficiency of the electrode cables is improved, and the use cost of the electrode cables is reduced; through the expandable capsule, good contact between the electrode in the hole and the hole wall can be realized without integral grouting and plugging of the drill hole, the operation is simple and reliable, meanwhile, the grouting and solidification time of the long drill hole is saved, after the direct current method monitoring in the hole is finished, the pushing pipe, the electrode carrying module, the electrode cable and other equipment can be completely withdrawn from the drill hole, the drill hole can be continuously used as fracturing holes, gas extraction holes and other purposes, the multipurpose of one hole is realized, the use efficiency of the drill hole is greatly improved, and the cost of the drill hole is reduced.
3. The design size and the shape of the push pipe can be matched with various drilling machines such as a crawler-type drilling machine and a directional drilling machine, the push pipe is pushed by the drilling machine in the whole process, the push pipe has good applicability to ultra-long drilling, the push pipe and a single-path pipe have good insulativity and high strength, interference is reduced to the maximum degree, monitoring precision is improved, and the anti-pulling and anti-torsion functions of the device can be realized during operation in long drilling.
4. In the electrical method monitoring in the slope or vertical drilling, the cable is detained and can be fixed multicore cable position to reduced the gravity of hole bottom cable and dragged, reduced the cable and warp, prolonged the life of cable.
5. The expansion capsule enables the electrode to be well coupled with the hole wall, and can be conveniently pushed to the next position after recovering the natural state, wherein the semicircular sealing plug and the elastic centralizer can reduce the eccentric degree of the pushing pipe and the one-way expander in the drilling hole and the friction force with the hole wall in the pushing process, and meanwhile, the electrode plate can be protected, so that the pushing operation is more smooth and convenient.
Drawings
FIG. 1 is a schematic structural diagram of a connection portion of a push pipe, a multi-core cable and an electrode-carrying module according to the present invention;
FIG. 2 is a schematic structural diagram of a carrier module according to the present invention;
FIG. 3 is a schematic view of a one-way expander according to the present invention;
FIG. 4 is a schematic view of a pusher tube structure according to the present invention;
FIG. 5 is a schematic structural diagram of the sealed transition interface according to the present invention;
FIG. 6 is a flow chart of a method for mounting and monitoring a recoverable DC-method electrode in a long borehole according to the present invention;
FIG. 7 is a diagram of the vertical hole monitoring implementation of the DC method of the present invention;
FIG. 8 is a diagram of a dual-hole monitoring implementation of the present invention for a downhole coal mine;
in the figure, 1-pushing pipe, 2-electrode carrying module, 3-multi-core cable, 4-single-way expander, 5-single-way pipe, 6-through hole, 7-expansion capsule, 8-capsule ring, 9-electrode plate, 10-double-core lead, 11-wire harness, 12-sealing wire plug, 13-sealing gasket I, 14-sealing gasket II, 15-cable buckle, 16-external thread, 17-internal thread, 18-sealing plug, 19-elastic centralizer, 20-sealing conversion interface, 21-cable hole, 22-gas injection hole, 23-pressure release valve, 24-lead hole and 25-electrical method host.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples.
As shown in fig. 1 to 5, the invention provides a recoverable direct current method electrode installation device in a long borehole, which comprises a push pipe 1, an electrode carrying module 2 and a multi-core cable 3.
The pushing pipe 1 is a hollow insulating rigid pipe, two ends of the pushing pipe are respectively provided with an internal thread 17 and an external thread 16, and the pushing pipe 1 is made of a high-strength insulating material and is resistant to pulling and twisting.
The electrode carrying module 2 comprises a one-way expander 4, an electrode plate 9, an elastic centralizer 19 and a cable tie 11, wherein the one-way expander 4 comprises a one-way pipe 5, an expansion capsule 7 and two capsule sealing rings 8, and the expansion capsule 7 is sealed at the middle position of the outer side of the one-way pipe 5 by the two capsule sealing rings 8; the single-way pipe 5 is a hollow rigid insulating pipe, two ends of the single-way pipe are respectively provided with an internal thread 17 and an external thread 16 which are matched with the pushing pipe 1, and the single-way pipe is made of high-strength insulating materials, is resistant to pulling and twisting; the middle position of the one-way pipe 5 is provided with a through hole 6 which is communicated with the inside of an expansion capsule 7; the elastic centralizers 19 are arranged at the two sides of the expansion capsule 7; the electrode plate 9 is stuck at the central position outside the expansion capsule 7; the one-way pipe 5 is provided with a wire guide hole 24 and a sealing wire plug 12 at the side of the expansion capsule 7, and the sealing wire plug 12 is screwed into the wire guide hole 24 to realize the air-tight sealing of the wire guide hole 24; the multi-core cable 3 is inserted into the one-way pipe 5, the twin-core lead 10 is drawn out from the lead hole 24 to be connected with the electrode plate 9, and the bundling belt 11 binds the twin-core lead 10 outside the one-way expander 4.
In a preferred embodiment of the present invention, the multi-core cable 3 is sealed inside the push pipe 1 and the one-way pipe 5 and passes through the cable buckle 15, and the cable buckle 15 is inserted at the connection position of the internal and external thread ends.
In a preferred embodiment of the present invention, a first sealing washer 13 is disposed between the cable buckle 15 and the end of the internal thread 17 of the push pipe 1 or the one-way pipe 5, and a second sealing washer 14 is disposed between the cable buckle 15 and the end of the external thread 16 of the push pipe 1 or the one-way pipe 5, so that the pneumatic sealing between the push pipes 1, between the one-way pipes 5, and between the push pipes 1 and the one-way pipes 5 can be realized.
In the preferred embodiment of the present invention, the external thread 16 ends of the one-way pipe 5 and the pushing pipe 1 can be connected with a sealing plug 18, and the internal thread 17 ends can be connected with a sealing conversion interface 20.
In a preferred embodiment of the present invention, the sealing plug 18 is semicircular or conical, the sealing conversion interface 20 is provided with a cable hole 21, an air injection hole 22 and a pressure release valve 23, the multi-core cable 3 passes through the cable hole 21 and is connected to the electrical host 25, the wind pressure pump is connected to the air injection hole 22 through a high-pressure gas pipe, and after the cable is connected to the high-pressure gas pipe, the sealing plug 18 and the sealing conversion interface 20 can realize the air-tight sealing of the two ends of the device.
In a preferred embodiment of the invention, the length of each section of the multi-core cable 3 is equal to the length of each section of measuring line which is monitored by the direct current method in a long drilling hole in a segmented manner, so that the instrument is convenient to disassemble and assemble and the depth of the hole is convenient to calculate.
The specific application of the first embodiment is as follows:
in a certain geological region, carrying out vertical hole-electricity method monitoring between wells and ground, wherein the monitoring range is 10-650 m deep geological stratum condition, and drilling from the ground surface vertically downwards is required. Determining that the length of each section of measuring line is 64m, the distance between measuring points is 2m, the number of each section of measuring points is 32, correspondingly selecting 32 electrode carrying modules 2, dividing the whole monitoring range into 10 sections for monitoring, selecting 11 multi-core cables with the length of 64m, 32 electrode carrying modules with the length of 2m, and monitoring a plurality of 2m push pipes 1 by adopting a forward method.
And (5) vertically drilling by using a drilling machine, and performing collapse prevention protection on the length of 10m of the opening.
As shown in fig. 6 and 7, one end of a multi-core cable 3 is inserted from an internal thread 17 end of a first single-way pipe 5, a cable buckle 15 and two sealing gaskets are arranged at the internal thread 17 end, a sealing plug 18 is connected with an external thread 16 end of the first single-way pipe 5, a double-core lead 10 corresponding to a first electrode carrying module 2 in the multi-core cable 3 is led out from a lead hole 24 and is connected with an electrode plate 9 on the first electrode carrying module 2, the lead hole 24 is sealed by a sealing wire plug 12 to enable the lead hole 24 to realize high-pressure air tightness, a double-core lead 10 is arranged outside a single-way expander 4 by a wire bundling belt 11, elastic centralizers 19 which are numbered as the first electrode carrying module 2 are respectively arranged at two sides of an expansion capsule 7, half of the length of the first electrode carrying module 2 is inserted into a drill hole, and the other half of the length is left to be suspended by a drilling.
Inserting the other end of the multi-core cable 3 from the external thread 16 end of the second single-way pipe 5 to connect the first single-way pipe 5 with the second single-way pipe 5; connecting the electrode plate 9 and the multi-core cable 3 with the double-core lead 10 corresponding to the second electrode carrying module 2 in the same manner, sealing a lead hole 24, then binding the double-core lead 10 outside the one-way expander 4, arranging a cable buckle 15 and two sealing gaskets at the end of the internal thread 17 of the one-way expander 4, arranging elastic centralizers 19 at two sides of the expansion capsule 7, numbering as the second electrode carrying module 2, wherein the interval between the electrode plates 9 of the first electrode carrying module 2 and the second electrode carrying module 2 is 2m and is the same as the interval between the measuring points, pushing the second electrode carrying module 2 into a drill hole, leaving a half of the length, and suspending the rest length by a drilling machine.
And connecting the third electrode carrying modules 2 in the same operation mode, numbering one by one during pushing, connecting 5 pushing pipes and 1 multi-core cable 3 after connecting 32 electrode carrying modules 2, and pushing the device to a measuring point position of 10-74 m. The external thread 16 end of the push pipe 1 is uniformly and forwardly installed, the multi-core cables 3 are sequentially spliced and inserted into the push pipe 1, the internal thread 17 end of the push pipe 1 is provided with two sealing gaskets and a cable buckle 15, the push pipe 1 and the multi-core cables 3 are numbered and pushed into a hole by using a drilling machine, and the rest part of the push pipe 1 is reserved in the hole opening and is suspended by using the drilling machine.
Connecting a sealing conversion interface 20 to the internal thread 17 end of the pushing pipe 1 at the orifice position, enabling the multi-core cable 3 to penetrate out of a cable hole 21 of the multi-core cable and be connected with an electrical method host 25, and connecting a gas injection hole 22 with a high-pressure wind pressure pump by using a high-pressure gas pipe; and starting a wind pressure pump to inject high-pressure gas so that the expansion capsule 7 expands under pressure, further realizing good coupling between the electrode plate 9 and the hole wall, keeping the air pressure in the pipe at 3MPa, and maintaining for 2min, and during the period, starting the electrical method host 25 to acquire data of a first section of measuring line and record the position of the measuring point and monitoring data.
And after the first-stage data acquisition is finished, the high-pressure air pump is closed, the pressure release valve 23 is opened, the gas in the pipe is discharged, the expansion capsule 7 is recovered to a natural state, and the electrode plate 9 is separated from the hole wall. The sealing conversion interface 20 is detached, then the multi-core cable 3 is disconnected with the electrical method host 25, and the high-pressure air pipe is disconnected with the air pressure pump; and continuously connecting the pushing pipe 1 and the multi-core cable 3, numbering the pushing pipes, determining the pushing distance in the hole according to the number and the single length of the pushing pipes 1 until the electrode is sent to the position of a second section of measuring point, suspending the pushing pipe 1 at the redundant part of the orifice by using a drilling machine, connecting the sealing conversion interface 20, connecting the electrical method host computer 25 and the wind pressure pump, injecting high-pressure gas, maintaining constant pressure, collecting electrical method data, detaching the instrument after the data collection is finished, continuously connecting the pushing pipes 1, and pushing the electrode to the position of the next section of measuring point. In the same operation, data of 10 segments of the measuring line is completed.
After all survey line data are collected, the device is drawn out of the drill holes for classification and recovery, and the 10 sections of survey line data are mathematically fitted to form complete and continuous drill hole monitoring data of 10-650 m drill holes.
The second embodiment is specifically applied as follows:
in the underground coal mining activity, a region with the width of 100m and the length of 20-1460 m in front of a coal face is monitored by adopting a double-hole direct current method monitoring technology for monitoring water damage of a coal seam floor, and a backward monitoring scheme is selected. The total length of the long drilling monitoring section is 1440m, the long drilling monitoring section is divided into 5 sections of measuring lines, the length of each section of measuring line is 288m, the distance between measuring points is 6m, the number of the measuring points in each section is 48, 12 multi-core cables 3 with the length of 288m are selected, 96 pole carrying modules 2 with the length of 2m and enough pushing pipes 1 with the length of 2m are selected, and 2 pushing pipes 1 are required to be installed among the pole carrying modules 2 at intervals during installation.
As shown in fig. 8, a proper drilling machine is selected according to the field situation to drill two 1460m long drilling holes on the bottom plate respectively in the advancing direction of the two sides of the roadway towards the working face, and the distance between the long drilling holes is 100 m; and performing collapse prevention protection 20m before drilling, flushing out drill cuttings in the hole by using high-pressure water, draining residual water in the hole, and pumping out the drill rod.
As shown in fig. 6 and 8, one end of the multi-core cable 3 is inserted from the internal thread 17 end of the first single-channel pipe 5, the internal thread 17 end is provided with a cable buckle 15 and two sealing washers, the external thread 16 end of the first single-channel pipe 5 is connected with a sealing plug 18, a double-core lead 10 corresponding to the first electrode carrying module 2 in the multi-core cable 3 is led out from a lead hole 24 and is connected with an electrode plate 9, the lead hole 24 is sealed by a sealing plug 12, the lead hole 24 is sealed in a high-pressure air-tightness manner, the double-core lead 10 is bundled by a cable bundling belt 11 outside the single-channel expander 4, elastic centralizers 19 are arranged at two sides of the expansion capsule 7, the number of the first electrode carrying module 2 is numbered, the half length of the first electrode carrying module 2 is inserted into a drill hole, and the other half length of the first electrode carrying module 2. Then connect 2 propelling movement pipes 1, the external screw thread 16 end of propelling movement pipe 1 is unified to be downthehole, and after the propelling movement pipe 1 installed, carry extremely module 2 No. two and connect, every 2 propelling movement pipes 1 installation extremely module 2 of carrying of this way, and numbering it respectively.
Until 48 electrode carrying modules 2 are installed in a single drill hole, then the push pipes 1 are installed and connected with the multi-core cable 3 in a unified mode, the push pipes are numbered, an elastic centralizer 19 is installed every 10 push pipes 1, the push depth is calculated according to the number of the push pipes 1 in the hole and the single length, and the electrode reaches the target measuring point position of a first section of measuring line with the length of 288m at the bottom of the drill hole; and the two drill holes adopt the same construction process to push the electrodes to the positions of target measuring points in the drill holes.
At the moment, a sealed conversion interface 20 is installed at the end of an internal thread 17 of the push pipe 1 at the orifice position, the multi-core cable 3 penetrates out of a cable hole 21 to be connected with an electrical method host computer 25, a high-pressure air pipe is used for connecting an air injection hole 22 and a wind pressure pump, the wind pressure pump is synchronously started for high-pressure air injection in two drill holes, so that the expansion capsule 7 is expanded under pressure, the electrode plate 9 is well coupled with the hole wall, the air pressure in the pipe is maintained at 3MPa, the time is kept for 2min, and the electrical method data acquisition of a first section of measuring line between the two.
Stopping the wind pressure pump after the data acquisition of the first section of measuring line is finished, opening the pressure release valve 23 to enable the expansion capsule 7 to recover the natural state, detaching the sealing conversion interface 20, then disconnecting the multi-core cable 3 from the electrical host 25, and disconnecting the high-pressure air pipe from the wind pressure pump; and slowly extracting the devices in the holes by using a drilling machine, moving the electrodes to the measuring point position on a second section of measuring line with the length of 288m after 144 push rods 1 are extracted, orderly recovering the multi-core cable 3 and the push pipes 1 in the extraction process, operating the two drill holes in the same way, connecting the electric host machine and the high-pressure wind pressure pump with the devices, carrying out direct current electric method data acquisition on the second section of measuring line, and recording the measuring point position and monitoring data.
Then, collecting electrical data on the third, fourth and fifth sections of measuring lines by using the same method, after the five sections of data are collected, completely extracting the device out of the drill hole, and orderly and separately recovering the multi-core cable 3, the pole carrying module 2 and the pushing pipe 1; and performing mathematical fitting on the five sections of data to form complete and continuous electrical monitoring data between the double holes.
Claims (7)
1. The utility model provides a recoverable direct current electrical method electrode installation device in long drilling which characterized in that: comprises a pushing pipe (1), an electrode carrying module (2) and a multi-core cable (3);
the pushing pipe (1) is a hollow rigid insulating pipe, and two ends of the pushing pipe are respectively provided with an internal thread (17) and an external thread (16); the electrode carrying module (2) comprises a one-way expander (4), an electrode plate (9), an elastic centralizer (19) and a wire binding belt (11), the one-way expander (4) comprises a one-way pipe (5), an expansion capsule (7) and capsule sealing rings (8), the expansion capsule (7) is sealed at the middle position of the outer side of the one-way pipe (5) through the two capsule sealing rings (8), the one-way pipe (5) is a hollow rigid insulating pipe, two ends of the one-way pipe are respectively provided with an internal thread (17) and an external thread (16) which are matched with the pushing pipe (1), the middle position of the one-way pipe (5) is provided with a through hole (6) communicated with the inside of the expansion capsule (7), the elastic centralizer (19) is arranged on the one-way pipe and located at two side positions of the expansion capsule (7), and the electrode plate (9) is adhered at the middle position of the outer side of the expansion capsule (7); the single-way pipe (5) is provided with a wire guide hole (24) and a sealing wire plug (12) at the side of the expansion capsule (7), and the sealing wire plug (12) is screwed into the wire guide hole (24) to realize the air-tight sealing of the wire guide hole (24); the multi-core cable (3) is inserted into the single-way pipe (5), the double-core lead (10) is drawn out from the lead hole (24) to be connected with the electrode plate (9), and the double-core lead (10) is bound to the outer side of the single-way expander (4) through the binding belt (11).
2. The recoverable direct current electrical method electrode installation device in the long drill hole of claim 1, wherein: the multi-core cable (3) is sealed in the pushing pipe (1) and the one-way pipe (5) and penetrates through the cable buckle (15), and the cable buckle (15) is clamped at the connection position of the inner thread and the outer thread.
3. The long drill hole retrievable dc electrical method electrode installation apparatus according to claim 2, wherein: a first sealing washer (13) is arranged between the cable buckle (15) and the inner thread (17) end of the pushing pipe (1) or the one-way pipe (5), and a second sealing washer (14) is arranged between the cable buckle (15) and the outer thread (16) end of the pushing pipe (1) or the one-way pipe (5), so that the pneumatic sealing between the pushing pipes (1), between the one-way pipes (5) and between the pushing pipes (1) and the one-way pipe (5) is realized.
4. The recoverable direct current electrical method electrode installation device in the long drill hole of claim 1, wherein: the external thread (16) end of the single-way pipe (5) and/or the pushing pipe (1) is connected with a sealing plug (18), and the internal thread (17) end of the single-way pipe (5) and/or the pushing pipe (1) is connected with a sealing conversion interface (20).
5. The recoverable direct current method electrode installation device in the long drill hole of claim 4, wherein: the sealing plug (18) is semicircular or conical, the sealing conversion interface (20) is provided with a cable hole (21), an air injection hole (22) and a pressure release valve (23), the multi-core cable (3) penetrates out of the cable hole (21) to be connected with an electrical method host (25), the air pressure pump is connected with the air injection hole (22) through a high-pressure air pipe, and the sealing plug (18) and the sealing conversion interface (20) realize the air tightness at two ends of the device.
6. The recoverable direct current electrical method electrode installation device in the long drill hole of claim 1, wherein: the length of each section of the multi-core cable (3) is equal to the length of each section of measuring line for section monitoring by the direct current method in the long drill hole.
7. A method for mounting and monitoring a recyclable direct current method electrode in a long drill hole in a segmented mode is characterized by comprising the following steps: the direct current method electrode installation device capable of being recycled in the long drill hole, which is disclosed by claim 1, comprises the following specific steps:
(a) drilling a long drill hole with a specific length according to the monitoring range, determining the length of a measuring line, the distance between measuring points, the number of electrodes and the segmented monitoring times of each section of the long drill hole monitored by a direct current method according to the total length of the long drill hole, and selecting a forward or backward segmented monitoring mode;
(b) one end of a multi-core cable (3) penetrates through an internal thread (17) end of a first single-way pipe (5), a corresponding double-core lead (10) in the multi-core cable (3) is led out from a lead hole (24) and is connected with an electrode plate (9), the double-core lead (10) is bound on the outer side of a single-way expander (4) by using a wire harness (11), the lead hole (24) is blocked by using a sealing plug (12), an external thread (16) end of the first single-way pipe (5) is connected with a sealing plug (18) to realize air-tight sealing of a port, and elastic centralizers (19) are arranged on two sides of an expansion capsule (7);
(c) according to the measuring point distance, the other end of the multi-core cable (3) penetrates through the external thread (16) ends of the electrode carrying module (2) or the pushing pipe (1) in sequence, the electrode carrying module (2) or the pushing pipe (1) is numbered simultaneously, and a cable buckle (15) and two sealing gaskets are arranged at the threaded connection position; then leading out corresponding double-core leads (10) in the multi-core cable (3) from lead holes (24) on the single-way tube (5) in sequence, connecting the double-core leads with corresponding electrode plates (9), tightly plugging the lead holes (24) by using sealing line plugs (12), and binding the double-core leads (10) at the outer side of the single-way expander (4) by using a binding tape (11); then the push pipe (1) and the one-way expander (4) are connected in sequence, and elastic centralizers (19) are arranged on two sides of each expansion capsule (7);
(d) sequentially pushing the installed one-way expander (4) and the pushing pipe (1) into the long drill hole, realizing synchronous installation and pushing until the electrode is pushed to a target measuring point position, and recording the measuring point position of the electrode in the long drill hole;
(e) after the pushing pipe (1) pushes all the electrodes into a long drill hole to be set at a position, connecting the internal thread (17) of the pushing pipe (1) at the position of the hole opening with a sealing conversion interface (20), connecting the multi-core cable (3) with an electrical method host (25) by penetrating a cable hole (21), and simultaneously sealing the conversion interface (20) to realize the air sealing of the end of the internal thread (17);
(f) connecting a high-pressure-resistant air pipe with an air injection hole (22) and an air pressure pump, starting the air pressure pump, injecting high-pressure gas into the pushing pipe (1) and the one-way expander (4), and expanding the expansion capsule (7) under pressure to enable the electrode plate (9) to be well coupled with the wall of the drill hole;
(g) starting an electrical method host (25) to acquire direct current electrical method data in the drill hole; during the monitoring period of the direct current electric method, the wind pressure pump is in a working state, so that the gas in the push pipe (1) and the pipeline of the one-way expander (4) is kept in a high-pressure constant-pressure state, and the expansion capsule (7) is always in an expansion state;
(h) after the monitoring data acquisition by the first-stage direct current method is finished, closing the high-pressure air pump, and opening a pressure release valve (23) to release the pressure of the high-pressure air in the pipeline; then the multi-core cable (3) is disconnected with the electrical method host (25), and the high-pressure air pipe is disconnected with the air pressure pump; continuously connecting the pushing pipe (1) with the multi-core cable (3) so as to push the electrode in the drill hole into the position of the next section of measuring point; or the push pipe (1) and the multi-core cable (3) are sequentially withdrawn and removed until the electrode in the drill hole retreats to reach the position of the next section of measuring point;
(i) according to the direct current method monitoring scheme in the on-site drilling, repeating the steps d to h in the same mode, sequentially completing data acquisition of each section of measuring line, and finally completing direct current method monitoring in the whole long drilling hole in a sectional monitoring mode;
(j) after the whole long drilling monitoring is finished, the multi-core cable (3), the electrode carrying module (2) and the push pipe (1) are recycled in a classified mode, mathematical fitting processing is carried out on the direct current method monitoring result of each section of measuring line in the drilling hole, and finally a continuous monitoring result of the whole long drilling hole is formed.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202092791U (en) * | 2011-06-08 | 2011-12-28 | 胡学军 | Installing utensil used for drill hole inner wall multiple spot temperature sensor positioning installation |
| CN102928881A (en) * | 2012-11-07 | 2013-02-13 | 山东大学 | Coupled cable for cross-hole resistivity computed tomography (CT) on ground |
| CN104166165A (en) * | 2014-07-29 | 2014-11-26 | 山东大学 | Horizontal borehole resistivity chromatography imaging detection device, detection system and detection method |
| CN204200238U (en) * | 2014-09-23 | 2015-03-11 | 山东科技大学 | A kind of Novel down-hole height of water flowing fractured zone observation probe of real-time probing |
| WO2015038392A2 (en) * | 2013-09-10 | 2015-03-19 | Gas Sensing Technology Corp. | An apparatus, system and method for multi zone monitoring in boreholes |
| CN106908843A (en) * | 2017-04-13 | 2017-06-30 | 中国矿业大学 | A kind of measuring method of coal petrography deep current potential |
| CN109709599A (en) * | 2019-01-15 | 2019-05-03 | 东北大学 | The device and method of microseismic sensors is installed and recycled in being crushed easy collapse hole rock mass |
| CN110007339A (en) * | 2019-04-22 | 2019-07-12 | 中国矿业大学 | A kind of recoverable microseismic sensors drilling rapid installation device and method |
| CN111395991A (en) * | 2020-03-17 | 2020-07-10 | 中国矿业大学 | Recyclable high-resistance high-pressure drilling sealing device and using method |
-
2020
- 2020-07-28 CN CN202010739111.XA patent/CN111766633B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202092791U (en) * | 2011-06-08 | 2011-12-28 | 胡学军 | Installing utensil used for drill hole inner wall multiple spot temperature sensor positioning installation |
| CN102928881A (en) * | 2012-11-07 | 2013-02-13 | 山东大学 | Coupled cable for cross-hole resistivity computed tomography (CT) on ground |
| WO2015038392A2 (en) * | 2013-09-10 | 2015-03-19 | Gas Sensing Technology Corp. | An apparatus, system and method for multi zone monitoring in boreholes |
| CN104166165A (en) * | 2014-07-29 | 2014-11-26 | 山东大学 | Horizontal borehole resistivity chromatography imaging detection device, detection system and detection method |
| CN204200238U (en) * | 2014-09-23 | 2015-03-11 | 山东科技大学 | A kind of Novel down-hole height of water flowing fractured zone observation probe of real-time probing |
| CN106908843A (en) * | 2017-04-13 | 2017-06-30 | 中国矿业大学 | A kind of measuring method of coal petrography deep current potential |
| CN109709599A (en) * | 2019-01-15 | 2019-05-03 | 东北大学 | The device and method of microseismic sensors is installed and recycled in being crushed easy collapse hole rock mass |
| CN110007339A (en) * | 2019-04-22 | 2019-07-12 | 中国矿业大学 | A kind of recoverable microseismic sensors drilling rapid installation device and method |
| CN111395991A (en) * | 2020-03-17 | 2020-07-10 | 中国矿业大学 | Recyclable high-resistance high-pressure drilling sealing device and using method |
Non-Patent Citations (1)
| Title |
|---|
| 谢向文 等: "《水利水电工程地下岩体综合信息采集技术-钻孔地球物理技术原理与应用》", 31 October 2018, 黄河水利出版社 * |
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