CN113156506A - Tunnel advanced drilling detection device based on tube wave detection and use method thereof - Google Patents
Tunnel advanced drilling detection device based on tube wave detection and use method thereof Download PDFInfo
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- CN113156506A CN113156506A CN202110441233.5A CN202110441233A CN113156506A CN 113156506 A CN113156506 A CN 113156506A CN 202110441233 A CN202110441233 A CN 202110441233A CN 113156506 A CN113156506 A CN 113156506A
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- 238000001514 detection method Methods 0.000 title claims abstract description 84
- 238000005553 drilling Methods 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 114
- 239000007788 liquid Substances 0.000 claims abstract description 43
- 238000002347 injection Methods 0.000 claims abstract description 17
- 239000007924 injection Substances 0.000 claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 6
- 239000010959 steel Substances 0.000 claims abstract description 6
- 239000011148 porous material Substances 0.000 claims description 19
- 238000005070 sampling Methods 0.000 claims description 7
- 238000004873 anchoring Methods 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 239000000314 lubricant Substances 0.000 claims description 5
- 230000001050 lubricating effect Effects 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 9
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 235000019994 cava Nutrition 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. analysis, for interpretation, for correction
- G01V1/30—Analysis
Abstract
The invention relates to the field of advance forecasting of tunnel geology. A tunnel advanced drilling detection device based on tube wave detection comprises a plugging assembly, a detector advancing and retracting assembly, a water injection assembly and an exhaust assembly, wherein a hole liquid plugging assembly is arranged at the position of an orifice of an advanced drilling hole, and the hole liquid is plugged in the advanced drilling hole by utilizing the blocking effect of a plugging device, a water plugging plate and a water plugging rubber plug; utilize the blast pipe to keep the pressure balance inside and outside the forepoling, impel or pull out the transducer simultaneously through hollow connecting rod of steel and lubricated water shutoff rubber stopper, fill up hole liquid through the inlet tube after, both can guarantee that the portable of transducer impels and pulls out and gathers the pipe wave data, can block up the seepage of hole liquid again, last pump sending hole liquid assurance hole medium is full of the drilling constantly through water pump and inlet tube simultaneously to improve pipe wave data acquisition quality. The tunnel advanced borehole detection device based on tube wave detection and the using method thereof are firstly applied to the field of advanced drilling geology, and can improve the prediction precision of poor geologic bodies.
Description
Technical Field
The invention belongs to the field of advanced prediction of tunnel geology, and particularly relates to a tunnel advanced drilling detection device based on tube wave detection and a using method thereof.
Background
The tube wave detection method is used as a novel method for detecting in-hole geological exploration, mainly uses tube wave as a working medium, uses a transmitting transducer to excite a pulse signal to make pore liquid vibrate, generates tube waves on the pore wall, and receives and records the generated tube waves by a receiving transducer, thereby realizing the detection of the existence and distribution of geologic bodies in a certain range beside a hole. The excitation and the reception of tube waves can be realized only by using pore liquid as a coupling medium for tube wave detection, and the acquisition quality of signals is difficult to ensure when the supply of the coupling medium in pores is insufficient. The existing tube wave detection method is usually used for detecting vertical drilling holes, for example, chinese patent CN1544934A discloses a tube wave detection method, wherein the detected drilling holes are vertical, and the filling of hole fluid medium into the vertical drilling holes is easy to realize, but for the tube wave detection of advanced drilling holes, because the advanced drilling holes are horizontal and transverse, the problem of difficulty in filling hole fluid is not solved at present, and the tube wave detection of such drilling holes is difficult to realize. In tube wave detection, no solution for the problem related to the filling of advanced borehole bore fluid has been found at present. The tube wave detection is introduced in the advanced drilling prediction, so that the detection range beside a hole is favorably expanded to more than 2m, and the prediction precision of poor geologic bodies can be improved.
However, the pipe wave detection is performed by advanced drilling, when hole liquid is filled into the hole, the connection pipe wave transducer probe connecting rod is considered to move inside and outside the drilled hole, the hole liquid easily overflows from the position of the orifice connecting rod, the hole liquid plugging effect is poor, and the pipe wave detection result is influenced. Therefore, to introduce tube wave sounding into advanced drilling prediction to improve the prediction accuracy, the problems of sealing of the hole fluid injection and the convenience of moving the transducer in the borehole must be solved.
Disclosure of Invention
The invention overcomes the defects of the technical problems and provides a tunnel advanced drilling detection device based on tube wave detection, which can effectively solve the sealing problem of hole liquid filling during tube wave detection advanced drilling and the problem of convenience of moving a transducer in an advanced drilling hole; on the premise of not influencing the quality of pipe wave detection data acquisition, the method for solving the problems that a coupling medium is not easy to block and detection operation is difficult to realize in tunnel advanced drilling pipe wave detection is provided, and tunnel advanced drilling pipe wave detection and data interpretation and analysis work is carried out according to the method, so that the application of pipe wave detection in tunnel advanced geological prediction is realized, and the effect of improving prediction accuracy is achieved.
One of the technical schemes of the invention is realized by the following measures:
a tunnel advanced drilling detection device based on tube wave detection comprises a plugging assembly, a detector advancing and retracting assembly, a water injection assembly and an exhaust assembly;
the plugging assembly comprises a plugging device in a shape of a circular truncated cone, the plugging device is arranged at the hole of the advanced drilling hole, and the plugging device is provided with a large-caliber end and a small-caliber end; the large-caliber end is an opening, the small-caliber end is provided with a water plugging plate, and the water plugging plate is provided with three through holes which are respectively a connecting hole, a drain hole and a vent hole; a hollow and lubricated water plugging rubber plug is arranged in the connecting hole; the water plugging rubber plug can control pore liquid to flow out from a gap between the water plugging rubber plug and the connecting rod to a great extent, has a good plugging effect on the pore liquid, and can reduce the friction force of the connecting rod to enable the connecting rod to be more easily pushed and pulled;
the detector advancing and retracting assembly comprises a detection device, a cable and a hollow connecting rod; the detection device comprises a transmitting transducer and a receiving transducer, wherein the transmitting transducer and the receiving transducer are arranged in the advanced drill hole, and are fixedly connected with the end of the connecting rod;
the water injection assembly comprises a water pump, a water inlet pipe and a water valve arranged on the water inlet pipe, one end of the water inlet pipe penetrates through the water injection hole, and the other end of the water inlet pipe is communicated with the water pump and conveys hole liquid into the pilot drill hole; the hole fluid for tube wave detection is generally used as a coupling agent, so the hole fluid needs to be continuously sent into the hole through a water pump and a water pipe to keep the hole fluid to fill the whole advanced drilling hole.
The exhaust assembly comprises an exhaust pipe and an air valve arranged on the exhaust pipe, the exhaust pipe is a PVC exhaust pipe, the exhaust pipe penetrates through the exhaust hole and extends to the bottom of the advanced drilling hole, and the exhaust pipe is used for maintaining balance of pressure inside and outside the drilling hole so that hole liquid can be filled in the whole drilling hole.
The plugging device and the water plugging plate are made of steel, and the connecting rod and the exhaust pipe are sectional pipes, so that the length of the plugging device and the water plugging plate can be conveniently adjusted according to the depth of the advance drilling hole. The water shutoff rubber stopper is 5-15cm in length and convenient to use.
The second technical scheme of the invention is realized by the following measures: a using method of a tunnel advanced drilling detection device based on tube wave detection is characterized by comprising the following steps:
the method comprises the following steps: fixing the transmitting transducer and the receiving transducer at the end of the connecting rod, penetrating a cable into the connecting rod, penetrating the connecting rod through a water plugging rubber plug fixed on the water plugging plate, and overlapping the connecting rod section by section according to the depth of the detected advanced drilling hole until the detecting device can extend into the preset hole depth;
step two: the exhaust pipe is overlapped section by section to extend to the bottom of the hole, the exhaust pipe is fixed on the exhaust hole of the water plugging plate, and a gap between the exhaust pipe and the exhaust hole is sealed by an anchoring agent;
step three: the plugging device, the connecting rod and the detection device are inserted into the advanced drilling hole, the plugging device is fixed at the hole opening of the advanced drilling hole by using a waterproof anchoring agent, and a boundary gap between the hole opening of the advanced drilling hole and the plugging device is filled, so that the hole opening of the advanced drilling hole is ensured to have good sealing and plugging performances;
step four: connecting a water pump with a water inlet pipe, opening a water valve to start injecting pore liquid into a hole, when the pore liquid at the outlet of an exhaust pipe flows out, proving that the hole is basically filled with the pore liquid, then closing an air valve of the exhaust pipe, controlling water pumping flow at the moment, and always keeping the water injection amount larger than the water seepage amount;
step five: matching with the key work of the device, starting a recorder to start detection work, when tube wave signal acquisition is carried out, firstly, lubricating property between a connecting rod and a water plugging rubber plug is ensured through a lubricating agent, a transmitting transducer and a receiving transducer are pulled out through the connecting rod with scale marks, in the pulling-out process, data acquisition is carried out once by taking the connecting rod with scale marks as a sampling point every 0.1m, data acquisition is carried out successively until a detector is pulled to an orifice of a pilot hole, and the detection work is finished; the water injection quantity is required to be maintained to be larger than the water seepage quantity in the data acquisition process; the high-quality data can be acquired only by ensuring that the drilling fluid is filled with the drilling holes all the time, otherwise, the sampling information can be identified by the drilling holes filled with the drilling fluid, and the geological condition of the drilling holes cannot be predicted.
Step six: according to the principle that the tube wave generates reflection on a wave impedance difference interface in the propagation process of the tube wave in the advanced drilling hole, a tube wave detection time profile is generated by interpreting collected tube wave detection data, the geologic body is jointly interpreted by combining an advanced drilling hole histogram and a tube wave detection time profile, the wave amplitude characteristics of the reflected tube wave are analyzed, and then the unfavorable geologic body development characteristics of cracks, karst caves, weak interlayers and the like beside the hole of the advanced drilling hole are deduced.
Compared with the prior art, the invention has the following beneficial effects:
the tunnel advanced borehole detection device based on tube wave detection and the using method thereof are firstly applied to the field of advanced drilling geology, and can improve the prediction precision of poor geologic bodies. The hole liquid plugging assembly is arranged at the orifice position of the advanced drilling hole, and the hole liquid is plugged inside the advanced drilling hole by using the blocking effect of the plugging device, the water plugging plate and the water plugging rubber plug which are in the shape of a circular truncated cone, so that the inside of the advanced drilling hole is fully filled with the hole liquid coupling medium. The exhaust pipe is utilized to keep the pressure inside and outside the advanced drill hole balanced, and the liquid in the hole can be ensured to be smoothly filled in the advanced drill hole. Simultaneously through hollow connecting rod of steel and lubricated water shutoff rubber stopper impel or pull out the transducer, after filling hole liquid through the inlet tube, because the advance drilling generally is horizontal hole and hole of inclining upward, connecting rod and water shutoff rubber stopper contact site are the key position of this device, both can guarantee the portable of transducer impel and pull out and gather the pipe wave data, the seepage of can shutoff hole liquid again, it is full of the drilling constantly to last pump sending hole liquid assurance downthehole medium through water pump and inlet tube simultaneously, in order to improve pipe wave data acquisition quality.
The device of above-mentioned design just can guarantee the development of the pipe ripples detection signal acquisition work of drilling in advance next step. When tube wave signal acquisition is carried out, firstly, the lubricating property of the connecting rod and the water plugging rubber plug is ensured through the lubricating agent, the transmitting transducer and the receiving transducer are pulled out through the connecting rod with scales, in the pulling-out process, acquisition operation is carried out once by taking every 0.1m as a sampling point, then, a tube wave detection time profile is generated for the acquired data, and the geologic body is subjected to joint interpretation by combining a drilling hole histogram and a tube wave detection time profile, so that the aim of tunnel advanced drilling prediction based on tube wave detection is fulfilled.
The plugging device is designed to be in a circular truncated cone cylinder shape, so that the device can be suitable for advanced drilling with different apertures, and the applicability of the device is greatly improved.
Drawings
FIG. 1 is a schematic structural diagram of a tunnel advanced borehole detection device based on tube wave detection;
wherein, labeled in the figures: 1-advance drilling; 2-plugging device; 3-water plugging plate; 4-water plugging rubber plug; 5-a cable line; 6-connecting rod; 7-a transmitting transducer; 8-a receiving transducer; 9-a recorder; 10-a water pump; 11-a water inlet pipe; 12-a water valve; 13-an exhaust pipe; 14-a gas valve; 15-pore liquid.
Detailed Description
The invention is further described with reference to the following figures and examples. It should be noted that the specific embodiments of the present invention are only for clearly describing the technical solutions, and should not be taken as a limitation to the scope of the present invention.
Referring to fig. 1, a tunnel advanced borehole detection device based on tube wave detection comprises a plugging assembly, a detector advancing and retracting assembly, a water injection assembly and an exhaust assembly; wherein:
the plugging assembly comprises a plugging device 2 in a shape of a circular truncated cone, the plugging device 2 is arranged at the orifice of the pilot drill hole 1, and the plugging device 2 is provided with a large-caliber end and a small-caliber end; the large-caliber end is an opening, the small-caliber end is provided with a water plugging plate 3, and the water plugging plate 3 is provided with three through holes which are respectively a connecting hole, a drain hole and a vent hole; a hollow and lubricated water plugging rubber plug 4 is arranged in the connecting hole; the plugging device 2 and the water plugging plate 3 are of an integrally formed structure;
the detector advancing and retracting component comprises a detecting device, a cable 5 and a hollow connecting rod 6; the connecting rod 6 penetrates through the water shutoff rubber plug 4 and can move back and forth along the axial direction of the water shutoff rubber plug 4, the detection device comprises a transmitting transducer 7 and a receiving transducer 8, the transmitting transducer 7 and the receiving transducer 8 are both arranged in the advanced drilling hole 1, the transmitting transducer 7 and the receiving transducer 8 are both fixedly connected with the end head of the connecting rod 6, and the transmitting transducer 7 and the receiving transducer 8 penetrate through the hollow connecting rod 6 through a cable 5 and are externally connected to the recorder 9; the recorder 9 is used for receiving, recording and storing data;
the water injection assembly comprises a water pump 10, a water inlet pipe 11 and a water valve 12 arranged on the water inlet pipe 11, one end of the water inlet pipe 11 penetrates through the water injection hole, and the other end of the water inlet pipe 11 is communicated with the water pump 10 and conveys hole liquid 15 into the pilot drill hole 1;
the exhaust assembly comprises an exhaust pipe 13 and an air valve 14 arranged on the exhaust pipe 13, wherein the exhaust pipe 13 penetrates through the exhaust hole and extends to the bottom of the pilot hole 1.
As a further improvement of the invention, the connecting rod 6 is provided with scale marks.
As a further improvement of the present invention, the plugging device 2 and the water plugging plate 3 are made of steel.
As a further improvement of the present invention, the exhaust pipe 13 is a PVC exhaust pipe 13.
As a further improvement of the present invention, the connecting rod 6 and the exhaust pipe 13 are both a segmented pipe body.
As a further improvement of the invention, the length of the water plugging rubber plug 4 is 5-15 cm.
The pore liquid 15 plugging assembly is arranged at the orifice position of the advanced drilling hole 1, and the pore liquid 15 is plugged inside the advanced drilling hole 1 by using the blocking effect of the circular truncated cone cylindrical plugging device 2, the water plugging plate 3 and the water plugging rubber plug 4, so that the inside of the advanced drilling hole 1 is fully filled with the pore liquid 15 coupling medium. The exhaust pipe 13 is used for keeping the internal and external pressure intensity balance of the advanced drill hole 1, and the hole liquid 15 can be ensured to be smoothly filled in the advanced drill hole 1. Simultaneously through hollow connecting rod 6 of steel and lubricated water shutoff rubber buffer 4 impel or pull out the transducer, fill hole liquid 15 after through inlet tube 11, because forepoling 1 generally is horizontal hole and tilt up hole, connecting rod 6 and water shutoff rubber buffer 4 contact site are the key part of this device, both can guarantee that the portable of transducer impels and draws the collection pipe wave data, can block up the seepage of hole liquid 15 again, it is full of the drilling constantly to keep pumping hole liquid 15 assurance downthehole medium through water pump 10 and inlet tube 11 simultaneously, in order to improve pipe wave data acquisition quality.
The second technical scheme of the invention is realized by the following measures: a using method of a tunnel advanced drilling detection device based on tube wave detection is characterized by comprising the following steps:
the method comprises the following steps: fixing a transmitting transducer 7 and a receiving transducer 8 at the end of a connecting rod 6, penetrating a cable 5 into the connecting rod 6, penetrating the connecting rod 6 through a water plugging rubber plug 4 fixed on a water plugging plate 3, and overlapping the connecting rod 6 section by section according to the depth of the detected advanced drilling hole 1 until a detection device can extend into a preset hole depth;
step two: the exhaust pipe 13 is overlapped section by section to extend to the bottom of the hole, the exhaust pipe 13 is fixed on the exhaust hole of the water plugging plate 3, and a gap between the exhaust pipe 13 and the exhaust hole is sealed by an anchoring agent;
step three: the plugging device 2 together with the connecting rod 6 and the detection device are inserted into the advanced drilling hole 1, the plugging device 2 is fixed at the hole opening of the advanced drilling hole 1 by using a waterproof anchoring agent, and the boundary gap between the hole opening of the advanced drilling hole 1 and the plugging device 2 is filled, so that the good sealing and plugging performance of the hole opening of the advanced drilling hole 1 is ensured;
step four: connecting a water pump 10 with a water inlet pipe 11, opening a water valve 12 to begin injecting pore liquid 15 into a hole, when the pore liquid 15 at the outlet of an exhaust pipe 13 flows out, proving that the hole is basically filled with the pore liquid 15, then closing an air valve 14 of the exhaust pipe 13, controlling the water delivery flow of the water pump 10, and always keeping the water injection amount larger than the water seepage amount;
step five: matching with the key work of the device, starting a recorder 7 to start detection work, when tube wave signal acquisition is carried out, firstly, lubricating property between a connecting rod 6 and a water plugging rubber plug 4 is ensured through a lubricating agent, a transmitting transducer 7 and a receiving transducer 8 are pulled out through the connecting rod 6 with scale marks, in the pulling-out process, data acquisition operation is carried out once by taking every 0.1m as a sampling point, data acquisition is carried out successively until a detector is pulled to an orifice of a pilot drill hole 1, and the detection operation is finished; the water injection quantity is required to be maintained to be larger than the water seepage quantity in the data acquisition process; the high-quality data can be acquired only by ensuring that the hole liquid 15 is filled with the drill holes all the time, otherwise, the sampling information can be identified by the drill hole part filled with the hole liquid 15, and the geologic body condition of the part cannot be predicted.
Step six: according to the principle that the tube wave generates reflection on a wave impedance difference interface in the propagation process of the tube wave in the advanced drilling hole 1, a tube wave detection time profile is generated by interpreting collected tube wave detection data, the geologic body is jointly interpreted by combining an advanced drilling hole histogram and a tube wave detection time profile, the wave amplitude characteristics of the reflected tube wave are analyzed, and then the development characteristics of the unfavorable geologic body such as cracks, karst caves, weak interlayers and the like within the range of 2 meters beside the hole of the advanced drilling hole 1 are inferred.
When tube wave signal acquisition is carried out, firstly, the lubricating property of the connecting rod 6 and the water plugging rubber plug 4 is ensured through the lubricating agent, the transmitting transducer 7 and the receiving transducer 8 are pulled out through the connecting rod 6 with scales, in the pulling-out process, acquisition operation is carried out once by taking every 0.1m as a sampling point, then a tube wave detection time profile is generated for the acquired data, and combined interpretation is carried out on a geologic body by combining a drilling hole histogram and a tube wave detection time profile, so that the aim of tunnel advanced drilling prediction based on tube wave detection is fulfilled.
The above description is intended to describe in detail the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the claims of the present invention, and all equivalent changes and modifications made within the technical spirit of the present invention should fall within the scope of the claims of the present invention.
Claims (7)
1. The utility model provides a tunnel advance borehole detection device based on pipe ripples is surveyed which characterized in that: comprises a plugging component, a detector advancing and retracting component, a water injection component and an exhaust component;
the plugging assembly comprises a plugging device in a shape of a circular truncated cone, the plugging device is arranged at the hole of the advanced drilling hole, and the plugging device is provided with a large-caliber end and a small-caliber end; the large-caliber end is an opening, the small-caliber end is provided with a water plugging plate, and the water plugging plate is provided with three through holes which are respectively a connecting hole, a drain hole and a vent hole; a hollow and lubricated water plugging rubber plug is arranged in the connecting hole;
the detector advancing and retracting assembly comprises a detection device, a cable and a hollow connecting rod; the connecting rod penetrates through the water plugging rubber plug and can move back and forth along the axial direction of the water plugging rubber plug, the detection device comprises a transmitting transducer and a receiving transducer, the transmitting transducer and the receiving transducer are both arranged in the advanced drill hole and are both fixedly connected with the end of the connecting rod, and the transmitting transducer and the receiving transducer penetrate through the hollow connecting rod through cables and are externally connected to the recorder;
the water injection assembly comprises a water pump, a water inlet pipe and a water valve arranged on the water inlet pipe, one end of the water inlet pipe penetrates through the water injection hole, and the other end of the water inlet pipe is communicated with the water pump and conveys hole liquid into the pilot drill hole;
the exhaust assembly comprises an exhaust pipe and an air valve arranged on the exhaust pipe, and the exhaust pipe penetrates through the exhaust hole and extends to the bottom of the advanced drilling hole.
2. The tunnel advanced borehole detection device based on tube wave detection as claimed in claim 1, characterized in that: and the connecting rod is provided with a scale mark.
3. The tunnel advanced borehole detection device based on tube wave detection as claimed in claim 1, characterized in that: the plugging device and the water plugging plate are made of steel.
4. The tunnel advanced borehole detection device based on tube wave detection as claimed in claim 1, characterized in that: the exhaust pipe is a PVC exhaust pipe.
5. The tunnel advanced borehole detection device based on tube wave detection as claimed in claim 1, characterized in that: the connecting rod and the exhaust pipe are all sectional pipes.
6. The tunnel advanced borehole detection device based on tube wave detection as claimed in claim 1, characterized in that: the length of the water plugging rubber plug is 5-15 cm.
7. The use method of the tunnel advanced borehole detection device based on the tube wave detection according to any one of claims 1-6, characterized by comprising the following steps:
the method comprises the following steps: fixing the transmitting transducer and the receiving transducer at the end of the connecting rod, penetrating a cable into the connecting rod, penetrating the connecting rod through a water plugging rubber plug fixed on the water plugging plate, and overlapping the connecting rod section by section according to the depth of the detected advanced drilling hole until the detecting device can extend into the preset hole depth;
step two: the exhaust pipe is overlapped section by section to extend to the bottom of the hole, the exhaust pipe is fixed on the exhaust hole of the water plugging plate, and a gap between the exhaust pipe and the exhaust hole is sealed by an anchoring agent;
step three: the plugging device together with the connecting rod and the detection device are inserted into the advanced drilling hole, the plugging device is fixed at the hole opening of the advanced drilling hole by using a waterproof anchoring agent, and a boundary gap between the hole opening of the advanced drilling hole and the plugging device is filled;
step four: connecting a water pump with a water inlet pipe, opening a water valve to start injecting pore liquid into a hole, when the pore liquid at the outlet of an exhaust pipe flows out, proving that the hole is basically filled with the pore liquid, then closing an air valve of the exhaust pipe, controlling water pumping flow at the moment, and always keeping the water injection amount larger than the water seepage amount;
step five: opening a recorder to start detection work, when tube wave signal acquisition is carried out, firstly, lubricating property between a connecting rod and a water plugging rubber plug is ensured through a lubricating agent, a transmitting transducer and a receiving transducer are pulled out through the connecting rod with scale marks, in the pulling-out process, data acquisition operation is carried out once by taking every 0.1m as a sampling point, data acquisition is carried out successively until a detecting instrument is pulled to an orifice of a pilot hole, and the detection operation is finished; the water injection quantity is required to be maintained to be larger than the water seepage quantity in the data acquisition process;
step six: and analyzing and processing the acquired data to obtain the development characteristics of the unfavorable geologic body within the range of 2m beside the advanced drilling hole.
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| CN114893145A (en) * | 2022-06-24 | 2022-08-12 | 渭南陕煤启辰科技有限公司 | Water plugging device for drilling, and detection equipment and detection method for formation fracture crushing condition |
| CN116299660A (en) * | 2023-03-23 | 2023-06-23 | 广西公路检测有限公司 | Fine installation equipment and method for TGP method trigger device and receiving device |
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| CN113960683B (en) * | 2021-09-18 | 2023-05-19 | 中铁西南科学研究院有限公司 | Horizontal hole in-hole detection device for advanced geological detection of tunnel |
| CN114893145A (en) * | 2022-06-24 | 2022-08-12 | 渭南陕煤启辰科技有限公司 | Water plugging device for drilling, and detection equipment and detection method for formation fracture crushing condition |
| CN114893145B (en) * | 2022-06-24 | 2024-04-16 | 渭南陕煤启辰科技有限公司 | Water plugging device for drilling, stratum fracture crushing condition detection equipment and detection method |
| CN116299660A (en) * | 2023-03-23 | 2023-06-23 | 广西公路检测有限公司 | Fine installation equipment and method for TGP method trigger device and receiving device |
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