CN113203388B - Automatic measuring device for expansion deformation of liquid injection type protected layer and using method - Google Patents
Automatic measuring device for expansion deformation of liquid injection type protected layer and using method Download PDFInfo
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- CN113203388B CN113203388B CN202110591972.2A CN202110591972A CN113203388B CN 113203388 B CN113203388 B CN 113203388B CN 202110591972 A CN202110591972 A CN 202110591972A CN 113203388 B CN113203388 B CN 113203388B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
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Abstract
The invention provides an automatic measuring device for the expansion deformation of a liquid-injection type protected layer, which comprises a telescopic protective sleeve, a compression spring, a displacement sensor, a connecting rod, an armored cable, an expansion fixer, a straight-through one-way valve, a reverse-buckling high-pressure joint, a high-pressure sealing connecting drill rod, a water injection joint and a digital display meter. The invention also provides a use method of the automatic measuring device for the expansion deformation of the liquid-injection type protected layer. The invention adopts a hydraulic mode to replace the traditional steel wedge and other fixing modes, and has the characteristics of stable installation, convenient installation, strong anti-interference performance and the like; meanwhile, displacement sensors are arranged in the measuring device to replace long-distance steel wire rope relative displacement orifice measurement, direct high-precision real-time measurement of expansion deformation is realized, only one group of displacement sensor systems is needed, meanwhile, the high-pressure sealing connection drill rod is recyclable, the cost is low, the system is simple, and the reliability is high.
Description
Technical Field
The invention belongs to the technical field of coal mine protection layer exploitation, and particularly provides an automatic measuring device for expansion deformation of a liquid injection type protected layer and a using method thereof.
Background
The protection layer mining technology is a regional gas treatment technology for reducing the gas content of a coal bed adjacent to a protected high-gas or outburst dangerous coal bed and eliminating the outburst dangerous coal bed through the pressure relief and permeability improvement effects of mining protection coal beds under the condition of coal bed groups. According to the relative position relation between the protective layer and the protected layer, the protective layer can be divided into an upper protective layer and a lower protective layer. The occurrence characteristics of most mining area coal seam groups in China determine that the protection layer exploitation is an area outburst prevention measure which needs to be adopted for a long time in China. The expansion deformation of the coal seam is an important index for measuring the mining effect of the protective layer. Fifty-fifth rule of prevention and cure coal and gas outburst rules, 2019 edition: when a mine mines a certain protection layer for the first time or the interlayer spacing between the protection layer and the protected layer, lithology, the mining thickness of the protection layer and the like are greatly changed, the protection effect of the protected layer and the effective protection range thereof should be actually examined. The effective range of the protection effect investigation is no prominent dangerous area. If the maximum expansion deformation of the protected layer is more than 3 per mill through actual inspection, the inspection and inspection result can be applied to other areas with the same relation between the protected layer and the protected layer. The maximum expansion deformation is not more than 3 per mill, and the protection effect of each protected working surface must be checked: in addition, if the interlayer distance between the protective layer and the protected layer, lithology, the mining thickness of the protective layer, etc. are greatly changed, the effect inspection and the protection range investigation should be performed again.
At present, a deep base point method is mainly adopted for measuring the expansion deformation quantity of a coal seam, namely, a drill hole penetrating the coal seam is constructed in a rock roadway to the coal seam, a pair of steel wedges are respectively arranged on a top plate and a bottom plate of the coal seam to fix the deep base point, steel bars and steel pipes are led out of the holes through the steel wedges, the relative displacement of the steel bars and the steel pipes is measured, and the expansion deformation quantity of the coal seam is obtained by combining the drill hole angle for conversion. If the drilling distance is deeper, steel wire ropes can be used for replacing the steel bars and the steel pipes. The traditional measuring method has great difficulty in actual operation and potential safety hazard. The steel wedge is large in size, and is easy to collide with the hole wall to generate dislocation in the pushing process in the drilling hole, and even is blocked in the middle of the drilling hole, so that the installation is failed; the steel wedges and the steel bars are pushed to the coal seam roof to be fixed at first, the steel wedges and the steel tubes are pushed to the bottom plate to be fixed at next, the installation cannot be completed at one time, and the installation of the base point of the bottom plate can influence the stability of the base point of the roof; when the distance between the measuring place and the protected layer is far, the lengths of the steel pipes and the steel bars are increased, the weight is increased, the manual pushing is difficult, the steel bars and the steel pipes are easy to fall under the action of dead weight, and potential safety hazards exist; if steel wire ropes are used for replacing steel bars and steel pipes, the base point steel wedges are difficult to install and fix, and the steel wire ropes for measurement lack protection and can be blocked in hole wall cracks, so that measurement is inaccurate. In addition, the drilling deformation and drill cuttings influence the steel wedge to be difficult to install to a designated position, and the steel wedge which is easy to loosen and slide down to cause measurement failure due to mining influence has extremely high failure rate; the expansion deformation of the protected layer is small, often only a few millimeters, the drilling depth is large, the relative displacement of the upper steel wire rope and the lower steel wire rope is intuitively read, and the error is large.
The Chinese patent No. CN202010972156.1 discloses a device and a method for measuring the expansion deformation of a protected layer, wherein a guide pipe, a first hole sealing bag, a first bag grouting pipe, a sleeve, a second hole sealing bag, a second bag grouting pipe and a steel wire rope are arranged in a drill hole; according to the invention, a drilling machine and a drill rod for constructing a drilling hole are utilized to convey a steel wire rope, a first hole sealing bag, a first bag grouting pipe and the like to a position above a top plate of a protected coal seam of the drilling hole, grouting is fixed, and the displacement of the top plate of the protected coal seam is measured; a steel wire rope is threaded after the hole sealing component is fixed by a sleeve, the steel wire rope is conveyed to the lower part of a bottom plate of a protected coal bed in a drilled hole, grouting is fixed, and the displacement of the bottom plate of the protected coal bed is measured; and after the protective layer is mined, calculating the expansion deformation of the protected layer after the protective layer is mined by utilizing the displacement of the top plate and the displacement of the bottom plate of the protected coal layer. The device needs the fixed wire rope of hole sealing bag through the position of the roof of the coal seam and bottom plate again to through wire rope survey coal seam roof displacement and bottom plate displacement, just can realize by the expansion deformation volume of protective layer, this fixed mode is complicated, adopts wire rope survey, and measuring error is great.
The prior art is less concerned with techniques for measuring the amount of expansion deformation of a protective layer using a displacement sensor. The invention of China patent No. CN201610559046.6 discloses a method for measuring the expansion deformation of a protected layer, which comprises the steps of drilling and reaming by a drilling machine, and then respectively placing a top plate displacement measuring device and a bottom plate displacement measuring device in the drilling and reaming, wherein the top plate displacement measuring device comprises an upper small tray, a lower small tray, a first hollow rod, a first spring, a first data transmission line, a first displacement sensor and a first digital display meter; the upper end of the first spring is connected with the upper small tray, the lower end of the first spring is connected with the lower small tray through a first displacement sensor, the first displacement sensor is fixed on the top surface of the lower small tray, and the upper end of the first hollow rod is welded with the bottom surface of the lower small tray;
the bottom plate displacement measuring device comprises an upper large tray, a lower large tray, a second hollow rod, a second spring, a second data transmission line, a second displacement sensor and a second digital display meter, wherein the upper end of the second spring is connected with the upper large tray, the lower end of the second spring is connected with the lower large tray through the second displacement sensor, the second displacement sensor is fixed on the top surface of the lower large tray, and the upper end of the second hollow rod is welded on the bottom surface of the lower large tray;
according to the measuring method, drilling and reaming are needed, the process is complex, measuring devices are needed to be placed on the top plate and the bottom plate of the coal seam, the lower tray is easily affected by the falling body of the coal and rock, and the measuring accuracy is affected by the adoption of four groups of sensors, so that the cost is high.
The expansion deformation of the protected layer can occur in the process of the protection layer exploitation, the expansion deformation is small, often only a few millimeters, measurement and capture are needed in time, and the requirements on the reliability and the accuracy of the device are high; the research of the expansion deformation measuring device of the protected layer has very important significance for the gas extraction and effect inspection work of the protected layer.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides an automatic measuring device for the expansion deformation of a liquid injection type protected layer and a using method thereof. According to the measuring device, the expansion fixer is designed in consideration of the stability of drilling fixation, and the deformation and expansion amount of the protected layer are small, so that all changes of the expansion and deformation of the protected layer in the protection layer exploitation process can be sensitively captured through the displacement sensor and the compression spring, and the monitoring data are timely, accurate and high in precision.
In order to achieve the above purpose, the invention adopts the following technical scheme: the device comprises a telescopic protective sleeve, a compression spring, a displacement sensor, a connecting rod, an armored cable, an expansion fixer, a straight-through one-way valve, a reverse buckling high-pressure connector, a high-pressure sealing connection drill rod, a water injection connector and a digital display meter;
one end of the displacement sensor is hinged with an inner port of the telescopic protection sleeve, the displacement sensor can axially move along the telescopic protection sleeve, the other end of the displacement sensor is fixed with one end of the connecting rod, a compression spring is arranged in the telescopic protection sleeve, one end of the compression spring is fixed with the inner port of the telescopic protection sleeve, the other end of the compression spring is fixed with the outer wall of the displacement sensor, the other end of the connecting rod is fixed with one end of the expansion fixer, the other end of the expansion fixer is communicated with the high-pressure sealing connecting drill rod through a straight-through one-way valve and a back-buckling high-pressure connector, the tail end of the high-pressure sealing connecting drill rod is connected with a water injection connector, and the water injection connector is connected with a water injection pump through a high-pressure rubber pipe; the other end of the displacement sensor is connected with an external digital display meter through an armored cable.
Further, the expansion fixer comprises an expansion capsule, a fixer liquid injection pipe and a fixer middle pipe; the two ends of the expansion capsule are respectively buckled and sealed to the outside of the middle tube of the fixer, the outlet end of the liquid injection tube of the fixer stretches into a sealed space between the expansion capsule and the middle tube of the fixer, the inlet end of the liquid injection tube of the fixer is connected with the straight-through one-way valve, an inclined hole is formed in the middle tube of the fixer, and an armored cable sequentially penetrates through the connecting rod and the middle tube of the fixer and then penetrates out of the inclined hole to be connected with an external digital display meter.
Further, the connecting rod is in positive threaded connection with the telescopic displacement sensor.
Further, the back-buckling high-pressure connector is connected with the reverse threads of the high-pressure sealing connection drill rod.
Further, the number of the connecting rods and the number of the high-pressure sealing connection drill rods are at least one, and when the number of the connecting rods or the high-pressure sealing connection drill rods is two or more, the connecting rods or the high-pressure sealing connection drill rods are in forward threaded connection.
Further, the stroke of the telescopic protective sleeve is smaller than the range of the displacement sensor.
Further, a safety overflow valve is arranged on the water injection pump, and the threshold value of the safety overflow valve is smaller than the maximum pressure resistance value of the expansion capsule.
Further, the displacement sensor is a telescopic displacement sensor, a laser displacement sensor, an optical fiber displacement sensor or a grating displacement sensor.
Further, the displacement sensor, the armored cable and the digital display meter are intrinsic safety type.
The invention also provides a use method of the liquid injection type automatic device for measuring the expansion deformation of the protected layer, which comprises the following steps:
firstly, selecting a roadway with stable occurrence of a coal stratum, constructing a drill hole with a preset size by using a drilling machine, penetrating through a protected layer, and stopping construction after penetrating through a coal layer for 1 m;
step two, taking down a water injection joint in the automatic measuring device for the expansion deformation of the liquid injection type protected layer, pushing the automatic measuring device for the expansion deformation of the liquid injection type protected layer to the bottom of a drilling hole through a high-pressure sealing connection drill rod, connecting an armored cable with a digital display meter, displaying the reading of a displacement sensor through the digital display meter, continuously pushing the measuring device, compressing a compression spring in a telescopic protection sleeve, and controlling the pushing compression amount through reading the displacement reading of the digital display meter in real time;
step three, after connecting the high-pressure sealing connecting drill rod with the water injection pump through a water injection joint and a high-pressure rubber pipe, starting the water injection pump to inject water into the expansion fixer of the measuring device through the high-pressure sealing connecting drill rod, and enabling high-pressure water to flow through the straight-through one-way valve and the fixer liquid injection pipe to the expansion capsule and the middle space of the middle pipe of the fixer, wherein the expansion capsule expands and deforms, extrudes the rock wall of a drilling hole, and realizes the fixation of the measuring device;
stopping water injection of the water injection pump, removing the water injection joint and the high-pressure rubber pipe, reversely rotating the high-pressure sealing connecting drill rod by using the drilling machine to separate the reversely buckled high-pressure joint from the high-pressure sealing connecting drill rod, and withdrawing the high-pressure sealing connecting drill rod;
and fifthly, resetting the digital display meter to zero, and in the process of the recovery of the protective layer, monitoring and recording the displacement reading of the digital display meter in real time, and converting according to the drilling angle to obtain the expansion deformation of the protected layer.
Compared with the prior art, the invention has the following beneficial effects: compared with the prior art, the hydraulic type steel wedge is adopted to replace the traditional steel wedge and other fixing modes, and has the characteristics of stable installation, convenience in installation, high anti-interference performance and the like; meanwhile, displacement sensors are arranged in the measuring device to replace long-distance steel wire rope relative displacement orifice measurement, direct high-precision real-time measurement of expansion deformation is realized, only one group of displacement sensor systems is needed, meanwhile, the high-pressure sealing connection drill rod is recyclable, the cost is low, the system is simple, and the reliability is high.
Drawings
FIG. 1 is a schematic view of an automatic measuring device according to the present invention;
in the figure: 1 flexible protective sleeve, 2 compression spring, 3 displacement sensor, 4 connecting rod, 5 armoured cable, 6 expansion anchor, 7 straight-through check valve, 8 back-buckling high-pressure joint, 9 high-pressure seal connection drilling rod, 10 water injection joint, 11 water injection pump, 12 high-pressure rubber tube, 31 digital display table, 61 expansion capsule, 62 anchor notes liquid pipe, 63 anchor middle part pipe.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, an automatic measuring device for the expansion deformation of a liquid-injected protected layer is generally used for pushing a depth of more than 10m, and comprises a telescopic protecting sleeve 1, a compression spring 2, a displacement sensor 3, a connecting rod 4, an armored cable 5, an expansion fixer 6, a straight-through one-way valve 7, a back-buckled high-pressure joint 8, a high-pressure sealing connecting drill rod 9, a water injection joint 10 and a digital display meter 31;
one end of the displacement sensor 3 is hinged with the inner port of the telescopic protection sleeve 1, the other end of the displacement sensor 3 is fixed with one end of the connecting rod 4, the displacement sensor 3 can axially move along the telescopic protection sleeve 1, a compression spring 2 is arranged in the telescopic protection sleeve 1, one end of the compression spring 2 is fixed with the inner port of the telescopic protection sleeve, the other end of the compression spring 2 is fixed with the outer wall of the displacement sensor 3, the other end of the connecting rod 4 is fixed with one end of the expansion fixer 6, the other end of the expansion fixer 6 is communicated with the high-pressure sealing connection drill rod 9 through a straight-through one-way valve 7 and a reversely buckled high-pressure joint 8, the tail end of the high-pressure sealing connection drill rod 9 is connected with a water injection joint 10, and the water injection joint 10 is connected with a water injection pump 11 through a high-pressure rubber pipe 12; the other end of the displacement sensor 3 is connected with an external digital display meter 31 through an armored cable 5.
The expansion anchor 6 comprises an expansion capsule 61, an anchor filling pipe 62 and an anchor middle pipe 63; the two ends of the expansion capsule 61 are respectively buckled and sealed to the outside of the middle tube 63 of the fixer, the outlet end of the liquid injection tube 62 of the fixer stretches into the sealed space between the expansion capsule 61 and the middle tube 63 of the fixer, the inlet end of the liquid injection tube 62 of the fixer is connected with the through one-way valve 7, the middle tube 63 of the fixer is provided with an inclined hole 631, and the armored cable 5 sequentially passes through the connecting rod 4 and the middle tube 63 of the fixer and then passes out of the inclined hole 631 to be connected with the external digital display meter 31. The outlet end of the holder liquid injection tube 62 is of a curved structure, and penetrates into the sealed space between the inflation capsule 61 and the holder middle tube 63 from the through hole provided in the holder middle tube 63.
The connecting rod 4 is in positive threaded connection with the displacement sensor 3.
The number of the connecting rods 4 and the number of the high-pressure sealing connection drill rods 9 are at least one, and the connecting rods 4 are in positive threaded connection with the middle tube 63 of the fixer. According to actual needs, when the number of the connecting rods 4 or the high-pressure sealing connection drill rods 9 is two or more, the connecting rods 4 or the high-pressure sealing connection drill rods 9 are in forward threaded connection.
The back-buckling high-pressure joint 8 is connected with a high-pressure sealing connection drill rod 9 in a back-thread mode.
The displacement sensor 3 is a telescopic displacement sensor, a laser displacement sensor, an optical fiber displacement sensor or a grating displacement sensor.
The axial movement stroke of the telescopic protective sleeve 1 relative to the displacement sensor 3 is smaller than the measuring range of the displacement sensor 3.
The water injection pump 11 is provided with a safety overflow valve, and the threshold value of the safety overflow valve is smaller than the maximum pressure resistance value of the expansion capsule 61.
The displacement sensor 3, the armored cable 5 and the digital display meter 31 are all intrinsic safety type.
The invention also provides a use method of the liquid injection type automatic device for measuring the expansion deformation of the protected layer, which comprises the following steps:
firstly, selecting a roadway with stable occurrence of a coal stratum, constructing a drill hole with a preset size by using a drilling machine, penetrating through a protected layer, and stopping construction after penetrating through a coal layer for 1 m;
step two, taking down a water injection joint in the automatic measuring device for the expansion deformation of the liquid injection type protected layer, pushing the automatic measuring device for the expansion deformation of the liquid injection type protected layer to the bottom of a drilling hole through a high-pressure sealing connection drill rod 9 (a plurality of high-pressure sealing connection drill rods 9 can be adopted to be connected according to the pushing depth requirement, and all the high-pressure sealing connection drill rods 9 are connected in a forward threaded mode), then connecting an armored cable 5 with a digital display meter 31, displaying the reading of a displacement sensor 3 through the digital display meter 31, continuing to push the measuring device in a micro mode, compressing a compression spring 2 in a telescopic protection sleeve 1, and controlling the pushing compression quantity through reading the displacement reading of the digital display meter 31 in real time;
step three, after connecting the high-pressure sealing connection drill rod 9 with the water injection pump 11 through the water injection joint 10 and the high-pressure rubber pipe 12, starting the water injection pump 11 to inject water into the expansion fixer 6 of the measuring device through the high-pressure sealing connection drill rod 9, enabling high-pressure water to flow through the straight-through one-way valve 7 and the fixer liquid injection pipe 62 to the expansion capsule 61 and the middle space of the fixer middle pipe 63, enabling the expansion capsule 61 to expand and deform, extruding the drilled rock wall, and realizing the fixation of the measuring device;
stopping water injection of the water injection pump, removing the water injection joint 10 and the high-pressure rubber tube 12, reversely rotating the high-pressure sealing connection drill rod 9 by using the drilling machine to separate the reversely buckled high-pressure joint 8 from the high-pressure sealing connection drill rod 9, and withdrawing the high-pressure sealing connection drill rod 9;
and fifthly, zeroing the digital display meter 31, and in the process of the recovery of the protective layer, monitoring and recording the displacement reading of the digital display meter 31 in real time, and converting according to the drilling angle to obtain the expansion deformation of the protected layer.
According to the device for measuring the expansion deformation of the protected layer, provided by the invention, the expansion fixer is designed in consideration of the stability of drilling, and in consideration of the small expansion deformation of the protected layer, all changes of the expansion deformation of the protected layer in the protection layer exploitation process can be sensitively captured through the displacement sensor and the spring assembly, so that the monitoring data are timely, accurate and high in precision.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (8)
1. The application method of the automatic measuring device for the expansion deformation of the liquid-injected type protected layer is characterized by comprising the following steps of:
the device comprises a telescopic protective sleeve, a compression spring, a displacement sensor, a connecting rod, an armored cable, an expansion fixer, a straight-through one-way valve, a reverse buckling high-pressure joint, a high-pressure sealing connecting drill rod, a water injection joint and a digital display meter;
one end of the displacement sensor is hinged with an inner port of the telescopic protection sleeve, the displacement sensor can axially move along the telescopic protection sleeve, the other end of the displacement sensor is fixed with one end of the connecting rod, a compression spring is arranged in the telescopic protection sleeve, one end of the compression spring is fixed with the inner port of the telescopic protection sleeve, the other end of the compression spring is fixed with the outer wall of the displacement sensor, the other end of the connecting rod is fixed with one end of the expansion fixer, the other end of the expansion fixer is communicated with the high-pressure sealing connecting drill rod through a straight-through one-way valve and a back-buckling high-pressure connector, the tail end of the high-pressure sealing connecting drill rod is connected with a water injection connector, and the water injection connector is connected with a water injection pump through a high-pressure rubber pipe; the other end of the displacement sensor is connected with an external digital display meter through an armored cable;
when the protective layer is used, the compression springs in the telescopic protective sleeve are compressed, so that the compression springs are in a compressed state, and all changes of expansion deformation of the protective layer in the protective layer exploitation process are sensitively captured through the displacement sensor and the spring assembly;
the automatic measuring device for the expansion deformation of the injected protected layer is carried out according to the following steps:
firstly, selecting a roadway with stable occurrence of a coal stratum, constructing a drill hole with a preset size by using a drilling machine, penetrating through a protected layer, and stopping construction after penetrating through a coal layer for 1 m;
step two, taking down a water injection joint in the automatic measuring device for the expansion deformation of the liquid-injected protected layer, pushing the automatic measuring device for the expansion deformation of the liquid-injected protected layer to the bottom of a drilling hole through a high-pressure sealing connection drill rod, connecting an armored cable with an external digital display meter, displaying the reading of a displacement sensor through the digital display meter, continuing pushing the measuring device, compressing a compression spring in a telescopic protection sleeve, and controlling the pushing compression quantity through reading the displacement reading of the digital display meter in real time;
step three, after connecting the high-pressure sealing connecting drill rod with the water injection pump through a water injection joint and a high-pressure rubber pipe, starting the water injection pump to inject water into the expansion fixer of the measuring device through the high-pressure sealing connecting drill rod, and enabling high-pressure water to flow through the straight-through one-way valve and the fixer liquid injection pipe to the expansion capsule and the middle space of the middle pipe of the fixer, wherein the expansion capsule expands and deforms, extrudes the rock wall of a drilling hole, and realizes the fixation of the measuring device;
stopping water injection of the water injection pump, removing the water injection joint and the high-pressure rubber pipe, reversely rotating the high-pressure sealing connecting drill rod by using the drilling machine to separate the reversely buckled high-pressure joint from the high-pressure sealing connecting drill rod, and withdrawing the high-pressure sealing connecting drill rod;
and fifthly, resetting the digital display meter to zero, and in the process of the recovery of the protective layer, monitoring and recording the displacement reading of the digital display meter in real time, and converting according to the drilling angle to obtain the expansion deformation of the protected layer.
2. The method for using the automatic measuring device for the expansion deformation of the liquid-injected type protected layer according to claim 1, wherein the expansion fixer comprises an expansion capsule, a fixer liquid-injecting pipe and a fixer middle pipe; the two ends of the expansion capsule are respectively buckled and sealed to the outside of the middle tube of the fixer, the outlet end of the liquid injection tube of the fixer stretches into a sealed space between the expansion capsule and the middle tube of the fixer, the inlet end of the liquid injection tube of the fixer is connected with the straight-through one-way valve, an inclined hole is formed in the middle tube of the fixer, and an armored cable sequentially penetrates through the connecting rod and the middle tube of the fixer and then penetrates out of the inclined hole to be connected with an external digital display meter.
3. The method for using the automatic measuring device for the expansion deformation of the liquid-injected type protected layer according to claim 1, wherein the connecting rod is in forward threaded connection with the telescopic displacement sensor.
4. The method for using the automatic measuring device for the expansion deformation of the liquid-injected type protected layer, as claimed in claim 1, wherein the back-buckling high-pressure connector is connected with a back thread of a high-pressure sealing connection drill rod.
5. The method for using the automatic measuring device for the expansion deformation of the liquid-injected type protected layer according to claim 1, wherein the number of the connecting rods and the number of the high-pressure sealing connecting drill rods are at least one, and when the number of the connecting rods or the high-pressure sealing connecting drill rods is two or more, the connecting rods or the high-pressure sealing connecting drill rods are in forward threaded connection.
6. The method for using the automatic measuring device for the expansion deformation of the liquid-filled type protected layer according to claim 1, wherein the displacement sensor is a telescopic displacement sensor, a laser displacement sensor, an optical fiber displacement sensor or a grating displacement sensor.
7. The method of claim 1, wherein the water injection pump is provided with a safety overflow valve, and the threshold value of the safety overflow valve is smaller than the maximum pressure resistance value of the expansion capsule.
8. The method for using the automatic measuring device for the expansion deformation of the liquid-injected type protected layer according to claim 1, wherein the displacement sensor, the armored cable and the digital display meter are all of an intrinsic safety type.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110591972.2A CN113203388B (en) | 2021-05-28 | 2021-05-28 | Automatic measuring device for expansion deformation of liquid injection type protected layer and using method |
| JP2022510847A JP7305874B1 (en) | 2021-05-28 | 2021-09-02 | How to use automatic measuring device for expansion deformation amount of liquid injection type protected layer |
| PCT/CN2021/116177 WO2022247044A1 (en) | 2021-05-28 | 2021-09-02 | Liquid injection-type protected layer expansion deformation amount automatic measurement device and use method |
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| CN202110591972.2A CN113203388B (en) | 2021-05-28 | 2021-05-28 | Automatic measuring device for expansion deformation of liquid injection type protected layer and using method |
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| CN117404014B (en) * | 2023-12-15 | 2024-02-09 | 中煤科工集团沈阳研究院有限公司 | Liquid injection, solid-liquid and push pipe circulating type directional drilling protection hole device and technology |
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Also Published As
| Publication number | Publication date |
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| JP2023531840A (en) | 2023-07-26 |
| WO2022247044A1 (en) | 2022-12-01 |
| CN113203388A (en) | 2021-08-03 |
| JP7305874B1 (en) | 2023-07-10 |
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