CN109211446A - A kind of hollow inclusion stress gauge and its measurement method - Google Patents
A kind of hollow inclusion stress gauge and its measurement method Download PDFInfo
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- CN109211446A CN109211446A CN201811214447.3A CN201811214447A CN109211446A CN 109211446 A CN109211446 A CN 109211446A CN 201811214447 A CN201811214447 A CN 201811214447A CN 109211446 A CN109211446 A CN 109211446A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
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- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a kind of stress meters for testing crustal stress more particularly to a kind of hollow inclusion stress gauge to test crustal stress field.The hollow inclusion stress gauge, including monitoring device, epoxy resin cylinder and guiding device, the detection device includes camera placements device and video camera, the camera placements device includes hollow, upper and pedestal, four groups of strain rosettes are uniformly pasted around epoxy resin cylinder, three-dimensional ground stress is measured by strain rosette, the taper top guide includes adjusting rod and taper top guide.The present invention passes through the installation detecting device on hollow inclusion stress gauge, can real-time monitoring colloid in epoxy resin cylinder under the action of distance rod outflow situation, so that it is guaranteed that squeeze out colloid in epoxy resin all, device is easy for installation and can be realized and is used for multiple times, save the cost.
Description
Technical field
The present invention relates to geostress survey apparatus field more particularly to a kind of hollow inclusion stress gauge and its measurement methods.
Background technique
Crust materials are made to produce interior stress effect due to geological structure etc., this stress is known as crustal stress.Crustal stress
Be be present in the earth's crust not by the natural stress of Engineering Disturbance, also referred to as rock mass initial stress, absolute stress or the stress of primary rock, broad sense
On also refer to the intracorporal stress of the earth, it includes the stress generated by the hot ﹑ in ground weight power ﹑ earth rotation speed variation and other factors,
Crustal stress activity can generate or influence geological structure.Violent crustal stress activity can cause earthquake, and crustal stress activity can also influence
The physical property and chemical property of Rocks In The Crust, mineral, do not consider crustal stress and being constructed often makes production cannot be just
It often carries out, and may cause serious engineering accident, therefore it is particularly significant accurately to measure crustal stress.
Measurement crustal stress is mainly used for measuring three-dimensional in rock and concrete and answers the most commonly used is hollow inclusion stress gauge now
Power, and stress meter is by a series of Strain Meter Set at strain gauge is encapsulated on hollow tube wall known to elasticity modulus.Use epoxy
Stress meter fixation in the borehole, is then monitored strain-responsive during drilling covers core stress relieving by resin, or handle is answered
Power meter is permanently placed at original place, for monitoring relative stress at any time.But because complicated construction cause work progress without
Method accurately determines the extrusion situation of epoxy resin colloid, and will cause experiment terminates just to find the intracorporal colloid of epoxy resin cylinder simultaneously
It does not squeeze out completely and influences experiment effect, therefore, colloid squeezes out situation when designing a kind of stress meter work convenient for observation
Hollow inclusion stress gauge is necessary.
Summary of the invention
The purpose of the present invention is to solve cannot accurately determine that epoxy resin colloid squeezes out situation completely in technology, and mention
A kind of hollow inclusion stress gauge convenient for observing colloid extrusion situation when stress meter works out.
To achieve the goals above, present invention employs following technical solutions:
A kind of hollow inclusion stress gauge, including monitoring device, epoxy resin cylinder and guiding device, the detection device packet
Camera placements device and video camera are included, the camera placements device includes hollow, upper and pedestal, and the video camera uses model
For the night vision USB line video camera of USB01, data terminal is connected by data line and carries out real-time monitoring, the data line can basis
On-site actual situations are equipped with suitable length, and the data terminal suggestion uses the Mine-used I. S mobile phone of model KT267-S,
Easy to carry and all enough can realize simultaneously multiple use, epoxy resin cylinder one end is in completely open shape, the other end
Protrusion and is provided with external screw thread at cylinder shrink mouth shape, and four groups of strain rosettes are uniformly pasted around epoxy resin cylinder, by strain rosette come
Three-dimensional ground stress is measured, to reach measurement purpose, the taper top guide includes adjusting rod and taper top guide.
Further, the camera placements device hollow, upper is cylindrical tube closed at one end, outside the cylindrical tube
Portion is equipped with the edge of a wing and is used to be engaged with the groove of epoxy resin cylinder, so that the two is installed together, the cylindrical tube is another
End is provided with external screw thread, and the placing device pedestal is bottle cap shape and is equipped with data line through hole, and the pedestal is equipped with internal screw thread, energy
Enough to be engaged with the external screw thread of hollow, upper, the length of the data line can be intercepted according to on-site actual situations, from the video camera
The data line through hole of placing device pedestal is drawn, and is passed through inside mounting rod and connecting rod, to guarantee data line in test
It is not destroyed, does not influence secondary use, the video camera is put into hollow, upper, gap portion is filled up with cotton so that video camera
Stable is placed in inside camera placements device, and pedestal and hollow, upper are tightened, then will be transferred to by the edge of a wing of hollow, upper
In epoxy resin cylinder indwelling groove, camera placements device and epoxy resin cylinder is set to link together, and coat in interface
To guarantee its leakproofness, the camera placements device is selected hard transparent PVC as material, can be made for sealant, installation sealing ring
The Mine-used I. S that video camera inside camera placements device is measured in real time when shove and is connected by data line
Mobile phone can also utilize video camera to feed back the extrusion situation of colloid to guarantee that the intracorporal colloid of epoxy resin cylinder all squeezes out
Deposit recording function using colloid mobility status when plastic squeeze record as later data analysis reference, because of the video camera quilt
The appropriate preservation of camera placements device is used multiple times, save the cost so can take out video camera after the completion of test.
Further, four groups of strain rosettes are uniformly pasted around the epoxy resin cylinder, every group of strain rosette is by four not Tongfangs
To foil gauge composition, foil gauge distribution density, which is concentrated, improves the accuracy and confidence of measurement result, when covering core, if due to rock
Stone condition causes certain angle strain rosettes to destroy, and can cast out its measurement data, and using remaining strain rosette measurement data as measurement
As a result, the epoxy resin cylinder is in the setting of completely open shape one end, there are two symmetrical limit holes.
Further, it is set on the guiding device adjusting rod there are two symmetrical limiting groove, spacer pin passes through asphalt mixtures modified by epoxy resin
The limiting groove reserved on the reserved limit hole insertion adjusting rod of rouge cylinder, to realize the company of taper top guide and epoxy resin cylinder
It connects, it is the wooden stick of 1mm that the spacer pin, which selects diameter, and when test under the action of thrust, wooden stick fracture, colloid outflow is described
Taper top guide is greater than epoxy resin cylinder outer diameter, the adjusting rod and taper top guide in coniform and circular cone and circular cone basal diameter
Material selects iron, and the adjusting rod and taper top guide are smooth welded connecting.
Crustal stress is tested using above-mentioned hollow inclusion stress gauge, comprising the following steps:
(1) measured zone according to required for engineering site carries out plan design, determines the position of measurement point, and set
Count measurement point depth；
(2) it is drilled on the spot according to point layout scheme in selected geostress survey point, it is scheduled according to design scheme
Inclination angle and depth bore the guide hole for going a diameter to be 120mm perpendicular to tunnel portion of side, it is desirable that and guide hole hole wall is complete, aperture is consistent,
Hole deviation, collapse hole phenomenon cannot occur；
(3) after guide hole depth reaches ideal lithology, the concentric position in guide hole bottom drills through the stress of diameter 100mm
Sensor mounting hole, depth is depending on the hollow inclusion stress gauge length and the complete situation of core, the drilling machine speed in drilling
Degree slows down as far as possible to take out complete stress meter mounting hole core；
(4) according to core situation is taken out in mounting hole, preferable one section of scar structure is chosen, is selected further according to this fragment position
It takes strain gauge to adjust pole length, is located at foil gauge position at this section of core, after determining installation site, install described hollow
Backpack body stress meter prepares colloid, and the installation of hollow inclusion stress gauge wants careful, to guarantee the success of geostress survey；
(5) after shifting the hollow inclusion stress gauge onto predetermined position, under the action of distance rod, the spacer pin is disconnected
It splitting, squeezes out colloid, real-time monitoring is carried out to colloid mobility status in epoxy resin cylinder using video camera, band colloid all squeezes out,
After stress meter and hole wall gap, stopping continues to press on distance rod, after colloid is fully cured, the hollow inclusion stress gauge
It is combined as a whole with rock mass, then implements stress relieving；
(6) after to condensation cure 16h, stress relieving is carried out, reads foil gauge reading first before set core releases with determination
Whether foil gauge work is normal, and rate of penetration is as far as possible slowly to read the reading of each foil gauge more comprehensively when stress relieving, directly
It is broken to the core for being equipped with strain gauge or the reading of foil gauge no longer changes with drilling, core can be taken out, taken
It is put into play as required after core out and carries out playing mould calibration test in mould calibration instrument, to determine the elasticity modulus and pool of rock
Pine can find out than parameter, the elasticity modulus of rock according to can be considered the rock circumferential strain amount of isotropic elastomer, pool
Loose ratio can be obtained according to axial strain amount and the ratio of circumferential strain amount；
(7) show that data are calculated and obtained a result according to formula according to (6).
Compared with prior art, beneficial effects of the present invention: the monitoring device is by video camera and camera placements device two
Part forms, and the camera placements device not only can protect video camera and not be destroyed during the test but also convenient to assemble and disassemble,
But also can closely be connect with epoxy resin, video camera can pass through the Mine-used I. S mobile phone real-time monitoring epoxy resin
Colloid squeezes out situation in cylinder, to guarantee that colloid squeezes out completely, and can stop promoting when suitable, avoid to its device
Material causes unnecessary damage, and in addition video camera can also record the mobility status of colloid in epoxy resin cylinder, with
Foundation as later data analysis, to improve the accuracy of measurement data.
Detailed description of the invention
Fig. 1 is hollow inclusion stress gauge sectional view；
Fig. 2 is A-A sectional view；
Fig. 3 is camera placements device pedestal；
Fig. 4 is the middle control top of camera placements device；
In figure: 1 mounting rod, 2 data lines, 3 sealing rings, 4 pedestals, 41 data line through holes, 5 hollow, uppers, 51 edges of a wing, 52
External screw thread, 6 camera placements devices, 7 cottons, 8 video cameras, 9 epoxy resin cylinders, 10 spacer pins, 11 limit holes, 12 limiting grooves,
13 adjusting rods, 14 taper top guides.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
Referring to figs. 1 to Fig. 4, a kind of hollow inclusion stress gauge, including monitoring device, epoxy resin cylinder 7 and guiding device,
The detection device includes camera placements device 6 and video camera 8, and the camera placements device 6 includes hollow, upper 5 and pedestal 4,
The video camera 8 is connected data terminal by data line 2 and is supervised in real time using the night vision USB line video camera of model USB01
It surveys, the data line 2 can be equipped with suitable length according to on-site actual situations, and the data terminal suggestion uses model
The Mine-used I. S mobile phone of KT267-S, it is easy to carry and can be all enough while realize multiple use, the epoxy resin cylinder 9
One end is in completely open shape, and the other end is in protrusion cylinder shrink mouth shape and is provided with external screw thread, is uniformly glued around epoxy resin cylinder
Four groups of strain rosettes are pasted, three-dimensional ground stress is measured by strain rosette, to reach measurement purpose, the taper top guide includes adjusting
Bar 13 and taper top guide 14, the hollow, upper 5 of the camera placements device 6 are cylindrical tube closed at one end, the cylindrical drum
It is equipped with the edge of a wing 51 outside body to be used to be engaged with the groove 91 of epoxy resin cylinder 9, to the two is installed together, the cylinder
The cylinder other end is provided with external screw thread, and the placing device pedestal is bottle cap shape and is equipped with data line through hole, and the pedestal is equipped with
Internal screw thread can be engaged with the external screw thread of hollow, upper, and the length of the data line 2 can be intercepted according to on-site actual situations, from
The data line through hole 41 of the camera placements device pedestal 4 is drawn, and is passed through inside mounting rod 1, to guarantee that data line 2 exists
It is not destroyed when test, does not influence secondary use, the video camera 8 is put into hollow, upper 5, gap portion is filled up with cotton 7
It is placed in inside camera placements device 6, pedestal 4 and hollow, upper 5 is tightened, then will be by hollow so that video camera 8 is stable
The edge of a wing 51 on top 5 is transferred in 9 indwelling groove 91 of epoxy resin cylinder, connects camera placements device 6 and epoxy resin cylinder 9
Together, and in interface sealant, installation sealing ring 3 are coated to guarantee its leakproofness, the camera placements device 6 is selected firmly
Matter transparent PVC can make the video camera 8 inside camera placements device 6 be measured in real time and lead to when shove as material
The Mine-used I. S mobile phone of the connection of data line 2 is crossed to feed back the extrusion situation of colloid, to guarantee the colloid in epoxy resin cylinder 9
It all squeezes out, colloid mobility status when plastic squeeze can also be recorded as later data using the recording function of depositing of video camera 8
The reference of analysis can will image after the completion of test because of the preservation that the video camera 8 is appropriate by video camera placing device 6
Machine 8 takes out, and uniformly pastes four groups of strain rosettes 92 around the epoxy resin cylinder 9, and every group of strain rosette is answered by four different directions
Become piece composition, foil gauge distribution density concentrates the accuracy and confidence for improving measurement result, when covering core, if due to ROCK CONDITIONS
It causes certain angle strain rosettes to destroy, its measurement data can be cast out, and using remaining strain rosette measurement data as measurement result, institute
Epoxy resin cylinder 9 is stated in the setting of completely open shape one end there are two symmetrical limit hole 11, on the guiding device adjusting rod 13
If spacer pin 10 passes through the limit hole 11 that epoxy resin cylinder 9 is reserved and is inserted on adjusting rod 13 there are two symmetrical limiting groove 12
Reserved limiting groove 12, to realize the connection of taper top guide 14 and epoxy resin cylinder 9, the selection of spacer pin 11 diameter is
The wooden stick of 1mm, when test under the action of thrust, wooden stick fracture, colloid outflow, the taper top guide 14 is in coniform and circular cone
And circular cone basal diameter is greater than 9 outer diameter of epoxy resin cylinder, the material of the adjusting rod 13 and taper top guide 14 selects iron, described
Adjusting rod 13 and taper top guide 14 are smooth welded connecting.
Embodiment 1:
Crustal stress is tested using above-mentioned hollow inclusion stress gauge, comprising the following steps:
(1) measured zone according to required for engineering site carries out plan design, determines the position of measurement point, and set
Count measurement point depth；
(2) it is drilled on the spot according to point layout scheme in selected geostress survey point, it is scheduled according to design scheme
Inclination angle and depth bore the guide hole for going a diameter to be 120mm perpendicular to tunnel portion of side, it is desirable that and guide hole hole wall is complete, aperture is consistent,
Hole deviation, collapse hole phenomenon cannot occur；
(3) after guide hole depth reaches ideal lithology, the concentric position in guide hole bottom drills through the stress of diameter 100mm
Sensor mounting hole, depth is depending on the hollow inclusion stress gauge length and the complete situation of core, the drilling machine speed in drilling
Degree slows down as far as possible to take out complete stress meter mounting hole core；
(4) according to core situation is taken out in mounting hole, preferable one section of scar structure is chosen, is selected further according to this fragment position
It takes strain gauge to adjust pole length, is located at foil gauge position at this section of core, after determining installation site, install described hollow
Backpack body stress meter prepares colloid, and the installation of hollow inclusion stress gauge wants careful, to guarantee the success of geostress survey；
(5) after shifting the hollow inclusion stress gauge onto predetermined position, under the action of distance rod, the spacer pin 10 is disconnected
It splits, squeezes out colloid, real-time monitoring is carried out to colloid mobility status in epoxy resin cylinder 9 using video camera 8, band colloid all squeezes
Out, after full of stress meter and hole wall gap, stopping continues to press on distance rod, and after colloid is fully cured, the hollow inclusion is answered
Power meter is combined as a whole with rock mass, then implements stress relieving；
(6) after to condensation cure 16h, stress relieving is carried out, reads foil gauge reading first before set core releases with determination
Whether foil gauge work is normal, and rate of penetration is as far as possible slowly to read the reading of each foil gauge more comprehensively when stress relieving, directly
It is broken to the core for being equipped with strain gauge or the reading of foil gauge no longer changes with drilling, core can be taken out, taken
It is put into play as required after core out and carries out playing mould calibration test in mould calibration instrument, to determine the elasticity modulus and pool of rock
Pine can find out than parameter, the elasticity modulus of rock according to can be considered the rock circumferential strain amount of isotropic elastomer, pool
Loose ratio can be obtained according to axial strain amount and the ratio of circumferential strain amount；
(7) show that data are calculated and obtained a result according to formula according to (6).
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, based on the technical solutions of the present invention, those skilled in the art are not needed to make the creative labor and can be done
Various modifications or changes out are still within protection scope of the present invention.
Claims (5)
1. a kind of hollow inclusion stress gauge, including monitoring device, epoxy resin cylinder and guiding device, it is characterised in that: the inspection
Surveying device includes camera placements device and video camera, and the camera placements device includes hollow, upper and pedestal, the video camera
Using the night vision USB line video camera of model USB01, data terminal is connected by data line and carries out real-time monitoring, the data
Line can be equipped with suitable length according to on-site actual situations, and the data terminal suggestion uses mining of model KT267-S
Peace type mobile phone, it is easy to carry and all enough can realize simultaneously multiple use, epoxy resin cylinder one end in completely open shape,
The other end is in protrusion cylinder shrink mouth shape and is provided with external screw thread, and four groups of strain rosettes are uniformly pasted around epoxy resin cylinder, are passed through
Strain rosette measures three-dimensional ground stress, to reach measurement purpose, the taper top guide includes adjusting rod and taper top guide.
2. a kind of hollow inclusion stress gauge according to claim 1, it is characterised in that: camera placements device hollow, upper is
Cylindrical tube closed at one end, the cylindrical tube outside are equipped with the edge of a wing and are used to be engaged with the groove of epoxy resin cylinder, thus
The two is installed together, the cylindrical tube other end is provided with external screw thread, and the placing device pedestal is bottle cap shape and is equipped with
Data line through hole, the pedestal are equipped with internal screw thread, can be engaged with the external screw thread of hollow, upper, the length of the data line can
Intercepted according to on-site actual situations, drawn from the data line through hole of the camera placements device pedestal, and by mounting rod and
Inside connecting rod, to guarantee that data line is not destroyed in test, secondary use is not influenced, the video camera is put into hollow
Top, gap portion is filled up with cotton so that camera stabilization is placed in inside camera placements device, by pedestal and it is hollow on
Portion is tightened, then will be transferred in epoxy resin cylinder indwelling groove by the edge of a wing of hollow, upper, and camera placements device and epoxy are made
Resin cylinder links together, and coats sealant, installation sealing ring in interface to guarantee its leakproofness, the video camera peace
Setting device selects hard transparent PVC as material, and the video camera inside camera placements device can be made to carry out when shove in real time
The extrusion situation of colloid is detected and feeds back by the Mine-used I. S mobile phone of data line connection, to guarantee in epoxy resin cylinder
Colloid all squeeze out, colloid mobility status when plastic squeeze can also be recorded as the later period using the recording function of depositing of video camera
The reference of data analysis can will take the photograph after the completion of test because of the preservation that the video camera is appropriate by video camera placing device
Camera takes out, and is used multiple times, save the cost.
3. a kind of hollow inclusion stress gauge according to claim 2, it is characterised in that: around the epoxy resin cylinder uniformly
Four groups of strain rosettes are pasted, every group of strain rosette is made of the foil gauge of four different directions, and foil gauge distribution density concentration improves
The accuracy and confidence of measurement result, when covering core, if its survey can be cast out since ROCK CONDITIONS causes certain angle strain rosettes to destroy
Data are measured, and using remaining strain rosette measurement data as measurement result, the epoxy resin cylinder is set in completely open shape one end
Symmetrical limit hole there are two setting.
4. a kind of hollow inclusion stress gauge according to claim 3, it is characterised in that: set on the guiding device adjusting rod
There are two symmetrical limiting groove, spacer pin passes through the limit reserved on the limit hole insertion adjusting rod that epoxy resin cylinder is reserved
Groove, to realize the connection of taper top guide and epoxy resin cylinder, it is the wooden stick of 1mm that the spacer pin, which selects diameter, when test
Under the action of thrust, wooden stick fracture, colloid outflow, the taper top guide is in coniform and circular cone and circular cone basal diameter is greater than
The material of epoxy resin cylinder outer diameter, the adjusting rod and taper top guide selects iron, and the adjusting rod and taper top guide are smooth
Welded connecting.
5. a kind of method using a kind of hollow inclusion stress gauge test crustal stress as claimed in claim 4, which is characterized in that by
Following steps composition:
(1) measured zone according to required for engineering site carries out plan design, determines the position of measurement point, and design survey
Amount point depth；
(2) it is drilled on the spot according to point layout scheme in selected geostress survey point, according to the scheduled inclination angle of design scheme
The guide hole for going a diameter to be 120mm is bored perpendicular to tunnel portion of side with depth, it is desirable that guide hole hole wall is complete, aperture is consistent, cannot
Hole deviation, collapse hole phenomenon occurs；
(3) after guide hole depth reaches ideal lithology, the concentric position in guide hole bottom drills through the stress sensing of diameter 100mm
Device mounting hole, depth is depending on the hollow inclusion stress gauge length and the complete situation of core, and in drilling, drilling machine speed is most
Amount slows down to take out complete stress meter mounting hole core；
(4) according to core situation is taken out in mounting hole, preferable one section of scar structure is chosen, is answered further according to the selection of this fragment position
Force snesor adjusts pole length, is located at foil gauge position at this section of core, after determining installation site, installs the hollow inclusion
Stress meter prepares colloid, and the installation of hollow inclusion stress gauge wants careful, to guarantee the success of geostress survey；
(5) after shifting the hollow inclusion stress gauge onto predetermined position, under the action of distance rod, the spacer pin fracture is squeezed
Colloid out carries out real-time monitoring to colloid mobility status in epoxy resin cylinder using video camera, and band colloid all squeezes out, full of answering
After power meter and hole wall gap, stopping continues to press on distance rod, after colloid is fully cured, the hollow inclusion stress gauge and rock mass
It is combined as a whole, then implements stress relieving；
(6) after to condensation cure 16h, stress relieving is carried out, reads foil gauge reading first before set core releases to determine strain
Whether piece work is normal, and rate of penetration is as far as possible slowly to read the reading of each foil gauge more comprehensively when stress relieving, until peace
The reading of core fracture or foil gauge equipped with strain gauge no longer changes with drilling, can take out core, take out rock
It is put into play as required after core and carries out playing mould calibration test in mould calibration instrument, to determine the elasticity modulus and Poisson's ratio of rock
The elasticity modulus of parameter, rock can be found out according to can be considered the rock circumferential strain amount of isotropic elastomer, Poisson's ratio
It can be obtained according to axial strain amount and the ratio of circumferential strain amount；
(7) show that data are calculated and obtained a result according to formula according to (6).
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Cited By (7)
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| CN110006568A (en) * | 2019-04-12 | 2019-07-12 | 中国地质科学院地质力学研究所 | It is a kind of to obtain the method for three-dimensional ground stress using core and its obtain system |
| CN110376287A (en) * | 2019-06-27 | 2019-10-25 | 湖南科技大学 | A kind of geostress survey Tubular Yarn installation quality detection device and detection method |
| CN110530255A (en) * | 2019-09-04 | 2019-12-03 | 中国电建集团中南勘测设计研究院有限公司 | A kind of detecting earth stress rubber V shape triaxial strain meter cable connecting device, triaxial strain meter and its application method |
| CN111411942A (en) * | 2020-03-26 | 2020-07-14 | 重庆大学 | Ground stress testing device and method for trepanning stress relief method |
| CN113323650A (en) * | 2021-06-10 | 2021-08-31 | 中南大学 | Pneumatic ejection sticking three-dimensional strain gauge probe, positioning installer and installation method |
| CN113820059A (en) * | 2021-10-20 | 2021-12-21 | 辽宁工程技术大学 | Earth stress measurement hollow inclusion positioning device and using method |
| CN114088262A (en) * | 2021-11-25 | 2022-02-25 | 中国矿业大学 | Hollow inclusion stress meter with visual guiding and positioning functions and use method |
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Application publication date: 20190115 |