CN105928649B - Buried high energy storage rock mass stress release time lag characteristic measurement system and method - Google Patents
Buried high energy storage rock mass stress release time lag characteristic measurement system and method Download PDFInfo
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- CN105928649B CN105928649B CN201610234992.3A CN201610234992A CN105928649B CN 105928649 B CN105928649 B CN 105928649B CN 201610234992 A CN201610234992 A CN 201610234992A CN 105928649 B CN105928649 B CN 105928649B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0047—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes measuring forces due to residual stresses
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
Abstract
The invention discloses a kind of buried high energy storage rock mass stresses to discharge time lag characteristic measurement system, it includes measuring staff, the first displacement sensor, three second displacement sensors, third displacement sensor, the 4th displacement sensor, displacement meter anchor head, gauge head, strain gauge, bolt stress meters, anchor pole, acoustic emission sensor, Acquisition Instrument and computer；Primary stress release adjustment Evolution can be obtained using the present invention, the rule recognizes the high energy storage rock mass surrounding rock of chamber Unloading Damage of Soft Soil mechanism of in-depth large ground pressure, and developing large ground pressure cavern and Analysis of Surrounding Rock and supporting measure (supporting position, supporting time, supporting depth) has important theoretical foundation and engineering practical value.The release time lag characteristic of the high energy storage rock mass stress with crystal off-load fraction time effect and Evolution can be directly obtained by the present invention.
Description
Technical field
The present invention relates to rock mechanics experiment fields, discharge time lag characteristic in particular to a kind of buried high energy storage rock mass stress
Measurement system and method.
Background technology
After hole wall ledge excavation formed under further investigation large ground pressure, in country rock Unloading Damage of Soft Soil from table and in expansion
The rebound disintegration evolutionary process of the local surface layer rock mass of parent rock and the science of presentation are had disengaged from evolutionary process, including part hole wall
Phenomenon, find large ground pressure under because country rock excavate Unloading Damage of Soft Soil caused by failure and deformation of surrounding rocks mechanism, analysis theories and
Inhibit it to destroy method for protecting support of development etc., lacks the basic theory support for meeting live actual observation phenomenon, using wide at present
The general classical elastic plastic theory used, which explains, still certain limitation.
Up to highly underground cavern excavation country rock Unloading Damage of Soft Soil is from outward appearance to inner essence, from shallow to deep, this existing under stress condition
What it is as reflection is that rock mass stress release ruptures the process constantly to develop over time with rock convergence measure after excavating, and discloses highland
The high energy storage rock mass surrounding rock of chamber stress release of stress has time lag characteristic, and what is substantially embodied is the high energy storage rock of high-ground stress
The time effect of crystal off-load friction in body.Currently, not yet there are effective means and technology can directly obtain and be unloaded with crystal
The high energy storage rock mass stress release time lag characteristic and Evolution of lotus fraction time effect.
Invention content
The present invention provides a kind of buried high energy storage rock mass stress release time lag characteristic measurement aiming at above-mentioned technical problem
System and method, the primary stress release adjustment Evolution that system and method is obtained is to deepening the high energy storage of large ground pressure
Rock mass surrounding rock of chamber Unloading Damage of Soft Soil mechanism recognizes, and develops large ground pressure cavern and Analysis of Surrounding Rock and supporting measure (branch
Protect position, supporting time, supporting depth) there is important theoretical foundation and engineering practical value.
To achieve the above object, the buried high energy storage rock mass stress designed by the present invention discharges time lag characteristic measurement system,
It is characterized in that：It includes measuring staff, the first displacement sensor, second displacement sensor, third displacement sensor, the 4th displacement biography
Sensor, displacement meter anchor head, gauge head, strain gauge, bolt stress meters, anchor pole, acoustic emission sensor, Acquisition Instrument and computer；
Wherein, sound wave peephole, deep displacement and stress trajectory hole, anchor are vertically offered on large scale rock sample in situ to be measured
Rod aperture and drilling video recording drilling, there are four the sound wave peepholes, and four sound wave peepholes are arranged in the big ruler in original position to be measured
Four corners of rock sample are spent, there are four the boltholes, and four boltholes are arranged in rectangle in the middle part of large scale rock sample in situ to be measured
On four angles in region, the deep displacement and stress trajectory hole and drilling video recording drilling are arranged in large scale rock in situ to be measured
In the middle part rectangular area of sample, the grooving right hand edge of the deep displacement and stress trajectory hole apart from large scale rock sample in situ to be measured
Distance be equal to drilling video recording hole spacing large scale rock sample in situ to be measured grooving left hand edge distance, deep displacement and stress
The distance of grooving forward edge of the peephole apart from large scale rock sample in situ to be measured is equal to drilling video recording hole spacing original position to be measured
The distance of the grooving posterior edges of large scale rock sample；
It is respectively equipped with a first in-plane displancement observation mark in the middle part of the edge of the large scale rock sample in situ to be measured
First in-plane displancement observation point of point, original position large scale rock sample right hand edge to be measured and posterior edges is equipped with the 4th displacement sensing
Device, the middle part on the outside of the grooving right hand edge of original position large scale rock sample to be measured are equipped with the second in-plane displancement observation point, original position to be measured
Middle part on the outside of the grooving posterior edges of large scale rock sample also is provided with the second in-plane displancement observation point, original position large scale rock to be measured
Sample periphery is equipped with X axis datum point and Y axis datum point, and the first displacement sensor, institute are respectively mounted on X axis datum point and Y axis datum point
It states and passes through measuring staff between the second in-plane displancement observation point on the outside of grooving right hand edge and the first displacement sensor of X axis datum point
It connects, leads between the second in-plane displancement observation point and the first displacement sensor of Y axis datum point on the outside of grooving posterior edges
Measuring staff connection is crossed, original position large scale rock sample to be measured is set there are three surface displacement measuring point, and three surface displacement measuring points, which are located at, appoints
The outside of three boltholes of meaning；
The top of the large scale rock sample in situ to be measured is equipped with by the fixed platform of bearing, sets that there are three the on the platform
Two displacement sensors, three second displacement sensors are connected by measuring staff with corresponding surface displacement measuring point respectively；
The aperture in the deep displacement and stress trajectory hole is equipped with the gauge head of gauge head, deep displacement and stress trajectory hole aperture
It is interior to be equipped with third displacement sensor, displacement meter anchor head, displacement are provided with by being in the milk in the deep displacement and stress trajectory hole
It counts anchor head and third displacement sensor is connected by measuring staff；
In respect of multiple, the difference that multiple strain gauges are uniformly mounted on inside deep displacement and stress trajectory hole is deep for the strain
It spends, is embedded with anchor pole in the anchor pole grout compartment of four boltholes, bolt stress meters are respectively mounted on each anchor pole；
Acoustic emission sensor, the anchor pole grout compartment of each bolthole are buried in the middle part in each deep displacement and stress trajectory hole
Bottom bury acoustic emission sensor；
Buried high energy storage rock mass stress release time lag characteristic measurement system further includes for being carried out to four sound wave peepholes
The sonic test instrument of acoustic detection；Buried high energy storage rock mass stress release time lag characteristic measurement system further includes for being recorded to drilling
As drilling carries out the optical imaging instrument of large scale rock sample crackle observation in situ to be measured；
First displacement sensor, second displacement sensor, third displacement sensor, the 4th displacement sensor, strain
Meter, bolt stress meters, acoustic emission sensor, sonic test instrument are connected by Acquisition Instrument with the signal output end of optical imaging instrument
The signal input part of computer.
It is a kind of to carry out stress release time lag spy using above-mentioned buried high energy storage rock mass stress release time lag characteristic measurement system
Property method for measuring, which is characterized in that it includes the following steps：
Step 1：Large scale rock sample left and right side in situ to be measured is cut using joint-cutting method, it is big to form original position to be measured
Grooving at left and right sides of scale rock sample, and the primary stress for carrying out large scale rock sample in situ to be measured measures, and obtains country rock horizontal plane
On initial plane stress level；
Step 2：After the completion of position primary stress residing for original position large scale rock sample to be measured measures, you can carry out other peripheries
Cutting, cutter are made to carry out opposite side synchronization, and substep is cut, and point three steps cutting completion, the depth of cut range of three steps is respectively 600
~800mm, 300~400mm, 300~400mm survey surface displacement using second displacement sensor in every step cutting process
Point carries out large scale rock sample surface displacement observation in situ to be measured；Using third displacement sensor to deep displacement and stress trajectory hole
Carry out large scale rock sample deep displacement observation in situ to be measured；The big ruler in original position to be measured is carried out to sound wave peephole using sonic test instrument
Velocity of wave in rock sample cutting unloading process is spent to observe；The big ruler in original position to be measured is carried out to deep displacement and stress trajectory hole using strain gauge
Spend rock sample cutting process medium and deep stress trajectory；Original position to be measured is carried out to deep displacement and stress trajectory hole using bolt stress meters
Anchor stress variation observation in large scale rock sample cutting process；It records a video to drill to drilling using optical imaging instrument and carries out original position to be measured
Rock sample crackle is observed in large scale rock sample cutting process；Acoustic emission sensor carries out original to be measured to deep displacement and stress trajectory hole
The sound emission space orientation of rock masses fracturing and injury tolerance observation in the large scale rock sample cutting process of position.
Primary stress release adjustment Evolution can be obtained using the present invention, the rule is to in-depth large ground pressure height storage
It can rock mass surrounding rock of chamber Unloading Damage of Soft Soil mechanism understanding, development large ground pressure cavern and Analysis of Surrounding Rock and supporting measure
(supporting position, supporting time, supporting depth) has important theoretical foundation and engineering practical value.It can be direct by the present invention
Obtain high energy storage rock mass stress release time lag characteristic and Evolution with crystal off-load fraction time effect.
Description of the drawings
Fig. 1 is the planar structure schematic diagram of the present invention；
Fig. 2 is the cross-sectional view of the present invention；
Fig. 3 is the circuit part structure diagram of the present invention.
In figure：1-platform, 2-sound wave peepholes, 3-surface displacement measuring points, the 4-the first in-plane displancement observation point,
4.1-the second in-plane displancement observation point, 5-deep displacements and stress trajectory hole, 6-groovings, 7-large scale rocks in situ to be measured
Sample, 7.1-rectangular areas, 8-bearings, 9-boltholes, 10-drilling video recording drillings, 11-X axis datum points, 11.1-Y-axis bases
On schedule, 12-measuring staffs, the 13-the first displacement sensor, 13.1-second displacement sensors, 13.2-third displacement sensors,
13.3-the four displacement sensor, 14-displacement meter anchor heads, 15-gauge heads, 16-strain gauges, 17-bolt stress meters, 18-anchors
Bar, 19-acoustic emission sensors, 20-Acquisition Instruments, 21-computers, 22-anchor pole grout compartments, 23-sonic test instrument, 24-
Optical imaging instrument.
Specific implementation mode
The following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
Buried high energy storage rock mass stress as shown in Figures 1 to 3 discharges time lag characteristic measurement system, it includes measuring staff 12, the
One displacement sensor 13, second displacement sensor 13.1, third displacement sensor 13.2, the 4th displacement sensor 13.3, displacement
Count anchor head 14, gauge head 15, strain gauge 16, bolt stress meters 17, anchor pole 18, acoustic emission sensor 19, Acquisition Instrument 20 and computer
21；
Wherein, sound wave peephole 2, deep displacement and stress trajectory hole are vertically offered on large scale rock sample 7 in situ to be measured
5, bolthole 9 and drilling video recording drilling 10, there are four the sound wave peepholes 2, and four sound wave peepholes 2 are arranged in be measured
Four corners of large scale rock sample 7 in situ, there are four the boltholes 9, and four boltholes 9 are arranged in large scale rock in situ to be measured
On four angles of 7 middle part rectangular area 7.1 of sample, the deep displacement and stress trajectory hole 5 and drilling video recording drilling 10 are arranged
In the middle part rectangular area 7.1 of large scale rock sample 7 in situ to be measured, the deep displacement and stress trajectory hole 5 are apart from original to be measured
The distance of 6 right hand edge of grooving of position large scale rock sample 7 is equal to 10 cutting apart from large scale rock sample 7 in situ to be measured of drilling video recording drilling
6 forward edge of grooving of the distance of 6 left hand edge of slot, deep displacement and stress trajectory hole 5 apart from large scale rock sample 7 in situ to be measured
Distance is equal to the distance of grooving 6 posterior edges of the drilling video recording drilling 10 apart from large scale rock sample 7 in situ to be measured；
It is respectively equipped with a first in-plane displancement observation mark in the middle part of the edge of the large scale rock sample 7 in situ to be measured
Point 4 (the first in-plane displancement observation point 4 surveys 7 surface displacement of large scale rock sample observation in situ for carrying out), the big ruler in original position to be measured
The the first in-plane displancement observation point 4 for spending 7 right hand edge of rock sample and posterior edges is equipped with the 4th displacement sensor 13.3, original to be measured
Middle part on the outside of 6 right hand edge of grooving of position large scale rock sample 7 is equipped with 4.1 (the second in-plane displancement of the second in-plane displancement observation point
The primary stress that observation point 4.1 is used to survey position residing for large scale rock sample 7 in situ measures), original position large scale rock to be measured
Middle part on the outside of 6 posterior edges of grooving of sample 7 also is provided with the second in-plane displancement observation point 4.1, original position large scale rock sample 7 to be measured
Periphery is equipped with X axis datum point 11 and Y axis datum point 11.1, and the first displacement is respectively mounted on X axis datum point 11 and Y axis datum point 11.1
Sensor 13, the first displacement of the second in-plane displancement observation point 4.1 and X axis datum point 11 on the outside of 6 right hand edge of the grooving
It is connected by measuring staff 12 between sensor 13, the second in-plane displancement observation point 4.1 on the outside of 6 posterior edges of grooving and Y-axis base
It is connected on schedule by measuring staff 12 between 11.1 the first displacement sensor 13, original position large scale rock sample 7 to be measured sets that there are three surfaces
Displacement measuring points 3, three surface displacement measuring points 3 are located at the outside of arbitrary three boltholes 9；
The top of the large scale rock sample 7 in situ to be measured is equipped with by 8 fixed platform 1 (I-steel) of bearing, the platform 1
On set there are three second displacement sensor 13.1, three second displacement sensors 13.1 pass through measuring staff 12 and corresponding surface respectively
Displacement measuring points 3 connect；
The aperture in the deep displacement and stress trajectory hole 5 is equipped with gauge head 15,5 aperture of deep displacement and stress trajectory hole
It is equipped with third displacement sensor 13.2 in gauge head 15, displacement is provided with by grouting in the deep displacement and stress trajectory hole 5
Anchor head 14 is counted, displacement meter anchor head 14 connects third displacement sensor 13.2 by measuring staff 12；
The strain gauge 16 has multiple, and multiple strain gauges 16 are uniformly mounted on inside deep displacement and stress trajectory hole 5
Different depth is embedded with anchor pole 18 in the anchor pole grout compartment 22 of four boltholes 9, anchor stress is respectively mounted on each anchor pole 18
Meter 17；Deep displacement and stress hole are mainly displacement and the stress variation observed in cutting process inside rock sample；Bolthole is main
It is the anchor force variation for observing anchor pole in cutting process；Preexisting crack and new in drilling video recording drilling mainly observation cutting process
The variation in raw crack；Sound wave peephole is mainly the velocity of wave variation for observing rock sample rock mass in cutting process.
Acoustic emission sensor 19 is buried at the middle part in each deep displacement and stress trajectory hole 5, and the anchor pole of each bolthole 9 fills
Bury acoustic emission sensor 19 in the bottom for starching section 22；
Buried high energy storage rock mass stress release time lag characteristic measurement system further includes for being carried out to four sound wave peepholes 2
The sonic test instrument 23 of acoustic detection；Buried high energy storage rock mass stress release time lag characteristic measurement system further includes for drilling
Video recording drilling 10 carries out the optical imaging instrument 24 of large scale rock sample crackle observation in situ to be measured；
First displacement sensor 13, second displacement sensor 13.1, third displacement sensor 13.2, the 4th displacement pass
The letter of sensor 13.3, strain gauge 16, bolt stress meters 17, acoustic emission sensor 19, sonic test instrument 23 and optical imaging instrument 24
Number output end passes through the signal input part that Acquisition Instrument 20 connects computer 21.
In above-mentioned technical proposal, the large scale rock sample 7 in situ to be measured is square rock sample, original position large scale rock sample to be measured
7 side size range is 600~800mm, and the altitude range of original position large scale rock sample 7 to be measured is 1200~1600mm.It is cut in this way
Rock sample length × width × height=1 cut:1:2.
In above-mentioned technical proposal, the grooving 6 is cyclic annular grooving, and the length range of the ring-type grooving is 700~900mm,
The width range of cyclic annular grooving is 56~75mm, and the depth bounds of cyclic annular grooving are 1200~1600mm.
In above-mentioned technical proposal, the sound wave peephole 2, deep displacement and stress trajectory hole 5, drill video recording drilling 10
Hole depth is equal, the sound wave peephole 2, deep displacement and stress trajectory hole 5, drilling video recording drilling 10 aperture is equal and diameter
It is 56mm.The diameter range can guarantee that probe is not easy to block during the test, which can guarantee the standard of monitoring result
True property.
In above-mentioned technical proposal, the sound wave peephole 2, deep displacement and stress trajectory hole 5, drill video recording drilling 10
Hole depth is 2m, the sound wave peephole 2, deep displacement and stress trajectory hole 5, drilling video recording drilling 10 aperture be
56mm.The design can guarantee the accuracy of monitoring result.
In above-mentioned technical proposal, distance of each sound wave peephole 2 away from 6 corresponding sides of grooving is equal and distance range is 50
~80mm；The distance range of the deep displacement and stress trajectory hole 5 apart from 6 right hand edge of grooving is 250~280mm, the brill
Distance range of the hole video recording drilling 10 apart from 6 left hand edge of grooving is 250~280mm；Each bolthole 9 is corresponded to away from grooving 6
The distance on side is equal and distance range is 150~200mm.The design can guarantee the accuracy of monitoring result.
In above-mentioned technical proposal, by setting of being in the milk, there are three displacement meter anchors in the deep displacement and stress trajectory hole 5
First 14, three displacement meter anchor heads 14 are separately positioned on the upper, middle and lower in deep displacement and stress trajectory hole 5.It realizes and divides
Not Guan Ce different depth displacement and stress variation.
It is a kind of to carry out stress release time lag using above-mentioned buried high energy storage rock mass stress release time lag characteristic measurement system
The method of characteristic measurement, it includes the following steps：
Step 1：7 left and right side of large scale rock sample in situ to be measured is cut (just by hand-held using joint-cutting method
Rock drill is taken to be cut), the grooving 6 of 7 left and right sides of large scale rock sample in situ to be measured is formed, and carry out the big ruler in original position to be measured
The primary stress for spending rock sample 7 measures, and obtains the initial plane stress level on country rock horizontal plane；
Step 2：After the completion of position primary stress residing for original position large scale rock sample 7 to be measured measures, you can carry out other peripheries
Cutting, cutter, which is made to carry out opposite side, to be synchronized, and substep is cut, and the cutting of point three steps is completed, and the depth of cut range of three steps is respectively
600~800mm, 300~400mm, 300~400mm, using second displacement sensor 13.1 to surface in every step cutting process
Displacement measuring points 3 carry out 7 surface displacement observation of large scale rock sample in situ to be measured；Using third displacement sensor 13.2 to deep displacement
And stress trajectory hole 5 carries out 7 deep displacement observation of large scale rock sample in situ to be measured；Using sonic test instrument 23 to sound wave peephole
2, which carry out large scale rock sample 7 in situ to be measured, cuts velocity of wave observation in unloading process；Deep displacement and stress are seen using strain gauge 16
Gaging hole 5 carries out 7 cutting process medium and deep stress trajectory of large scale rock sample in situ to be measured；Using bolt stress meters 17 to deep displacement
And stress trajectory hole 5 carries out anchor stress variation observation in 7 cutting process of large scale rock sample in situ to be measured；Utilize optical imaging instrument
24 pairs of drilling video recording drillings 10 carry out rock sample crackle in 7 cutting process of large scale rock sample in situ to be measured and observe；Acoustic emission sensor
The sound emission that 19 pairs of deep displacements and stress trajectory hole 5 carry out rock masses fracturing in 7 cutting process of large scale rock sample in situ to be measured is empty
Between positioning and injury tolerance observation；
Step 3：Computer 21 by 20 collected country rock horizontal plane of Acquisition Instrument initial plane stress level data, wait for
Survey 7 surface displacement observation data of original position large scale rock sample, 7 deep displacement of large scale rock sample in situ to be measured is observed, original position to be measured is big
Scale rock sample 7 cuts velocity of wave observation data in unloading process, 7 cutting process medium and deep stress trajectory of large scale rock sample in situ to be measured
Anchor stress variation observation data, large scale rock sample 7 in situ to be measured are cut in data, 7 cutting process of large scale rock sample in situ to be measured
The sound emission space of rock masses fracturing is fixed in rock sample crackle observation data, 7 cutting process of large scale rock sample in situ to be measured during cutting
Position and injury tolerance observe data, establish various data respectively and change with time relation curve, realize that buried high energy storage rock mass is answered
Power discharges time lag characteristic and measures.
In the step 1 of above-mentioned technical proposal, the primary stress that large scale rock sample 7 in situ to be measured is carried out using joint-cutting method is surveyed
Amount, the specific method for obtaining the initial plane stress level on country rock horizontal plane are：Joint-cutting method carries out large scale rock in situ to be measured
First the left and right side of large scale rock sample 7 in situ to be measured is cut when the primary stress of sample 7 measures, that is, forms original position to be measured
The grooving 6 of 7 left and right sides of large scale rock sample, passes through the first displacement sensor 13 on X axis datum point 11 and Y axis datum point 11.1
The change in displacement for observing the second in-plane displancement observation point 4.1 is observed, and is calculated, is enclosed by formula (1), formula (2)
Initial plane stress level on rock horizontal plane；
Wherein：L is the length of 7 both sides grooving 6 of large scale rock sample in situ to be measured；X is flat for second on the outside of 6 right hand edge of grooving
For face displacement observation punctuate 4.1 away from the 6 center line distance of grooving, y is the second in-plane displancement observation mark on the outside of 6 posterior edges of grooving
Point 4.1 is away from the 6 center line distance of grooving, Wx、WyRespectively two 4.1 corresponding side grooving 6 of the second in-plane displancement observation point excisions
Deformation of the large scale rock sample 7 in situ to be measured on the directions plane x and y afterwards, σx、σyFor the primary stress of grooving 6, E is original to be measured
The elasticity modulus of position large scale rock sample 7, μ are the Poisson's ratio of large scale rock sample 7 in situ to be measured.
The content that this specification is not described in detail belongs to the prior art well known to professional and technical personnel in the field.
Claims (10)
1. a kind of buried high energy storage rock mass stress discharges time lag characteristic measurement system, it is characterised in that：It includes measuring staff (12),
One displacement sensor (13), second displacement sensor (13.1), third displacement sensor (13.2), the 4th displacement sensor
(13.3), displacement meter anchor head (14), gauge head (15), strain gauge (16), bolt stress meters (17), anchor pole (18), voice sending sensor
Device (19), Acquisition Instrument (20) and computer (21)；
Wherein, sound wave peephole (2), deep displacement and stress trajectory hole are vertically offered on large scale rock sample (7) in situ to be measured
(5), bolthole (9) and drilling video recording drilling (10), there are four the sound wave peepholes (2), and four sound wave peepholes (2) are respectively
Four corners of large scale rock sample (7) in situ to be measured are arranged in, there are four the boltholes (9), and four boltholes (9) are arranged in
In the middle part of original position large scale rock sample (7) to be measured on four angles of rectangular area (7.1), the deep displacement and stress trajectory hole (5)
It is arranged in drilling video recording drilling (10) in the middle part rectangular area (7.1) of large scale rock sample (7) in situ to be measured, the deep
The distance of grooving (6) right hand edge of displacement and stress trajectory hole (5) apart from large scale rock sample (7) in situ to be measured is equal to drilling and records a video
The distance of grooving (6) left hand edge of drilling (10) apart from large scale rock sample (7) in situ to be measured, deep displacement and stress trajectory hole
(5) distance of grooving (6) forward edge apart from large scale rock sample (7) in situ to be measured is equal to drilling video recording drilling (10) distance and waits for
Survey the distance of grooving (6) posterior edges of large scale rock sample (7) in situ；
It is respectively equipped with a first in-plane displancement observation point in the middle part of the edge of the large scale rock sample (7) in situ to be measured
(4), large scale rock sample (7) right hand edge in situ to be measured and the first in-plane displancement observation point (4) of posterior edges are equipped with the 4th
Displacement sensor (13.3), it is to be measured original position large scale rock sample (7) grooving (6) right hand edge on the outside of middle part be equipped with the second plane position
Observation point (4.1) is moved, it is flat that the middle part on the outside of grooving (6) posterior edges of original position large scale rock sample (7) to be measured also is provided with second
Face displacement observation punctuate (4.1), original position large scale rock sample (7) periphery to be measured are equipped with X axis datum point (11) and Y axis datum point
(11.1), it is respectively mounted the first displacement sensor (13) on X axis datum point (11) and Y axis datum point (11.1), the grooving (6) is right
Lead between the second in-plane displancement observation point (4.1) on the outside of edge and the first displacement sensor (13) of X axis datum point (11)
Cross measuring staff (12) connection, the second in-plane displancement observation point (4.1) on the outside of grooving (6) posterior edges and Y axis datum point
(11.1) between the first displacement sensor (13) by measuring staff (12) connect, it is to be measured original position large scale rock sample (7) set there are three
Surface displacement measuring point (3), three surface displacement measuring points (3) are located at the outside of arbitrary three boltholes (9)；
The top of the large scale rock sample (7) in situ to be measured is equipped with by bearing (8) fixed platform (1), is set on the platform (1)
There are three second displacement sensor (13.1), three second displacement sensors (13.1) pass through measuring staff (12) and corresponding table respectively
Face displacement measuring points (3) connect；
The aperture of the deep displacement and stress trajectory hole (5) is equipped with gauge head (15), deep displacement and stress trajectory hole (5) aperture
Gauge head (15) in be equipped with third displacement sensor (13.2), set by grouting in the deep displacement and stress trajectory hole (5)
It is equipped with displacement meter anchor head (14), displacement meter anchor head (14) connects third displacement sensor (13.2) by measuring staff (12)；
The strain gauge (16) has multiple, and it is internal that multiple strain gauges (16) are uniformly mounted on deep displacement and stress trajectory hole (5)
Different depth, be embedded with anchor pole (18) in the anchor pole grout compartment (22) of four boltholes (9), pacify on each anchor pole (18)
Fill bolt stress meters (17)；
Acoustic emission sensor (19), the anchor pole of each bolthole (9) are buried in the middle part of each deep displacement and stress trajectory hole (5)
Bury acoustic emission sensor (19) in the bottom of grout compartment (22)；
Buried high energy storage rock mass stress release time lag characteristic measurement system further includes for four sound wave peephole (2) carry out sound
The sonic test instrument (23) of wave detection；Buried high energy storage rock mass stress release time lag characteristic measurement system further includes for drilling
Video recording drilling (10) carries out the optical imaging instrument (24) of large scale rock sample crackle observation in situ to be measured；
First displacement sensor (13), second displacement sensor (13.1), third displacement sensor (13.2), the 4th displacement
Sensor (13.3), strain gauge (16), bolt stress meters (17), acoustic emission sensor (19), sonic test instrument (23) and optics
The signal output end of imager (24) connects the signal input part of computer (21) by Acquisition Instrument (20).
2. buried high energy storage rock mass stress according to claim 1 discharges time lag characteristic measurement system, it is characterised in that：Institute
It is square rock sample to state large scale rock sample (7) in situ to be measured, the side size range of original position large scale rock sample (7) to be measured is 600~
The altitude range of 800mm, original position large scale rock sample (7) to be measured are 1200~1600mm.
3. buried high energy storage rock mass stress according to claim 1 discharges time lag characteristic measurement system, it is characterised in that：Institute
It is cyclic annular grooving to state grooving (6), and the length range of the ring-type grooving is 700~900mm, the width range of cyclic annular grooving for 56~
The depth bounds of 75mm, cyclic annular grooving are 1200~1600mm.
4. buried high energy storage rock mass stress according to claim 1 discharges time lag characteristic measurement system, it is characterised in that：Institute
The hole depth for stating sound wave peephole (2), deep displacement and stress trajectory hole (5), drilling video recording drilling (10) is equal, and the sound wave is seen
The aperture of gaging hole (2), deep displacement and stress trajectory hole (5), drilling video recording drilling (10) is equal.
5. buried high energy storage rock mass stress according to claim 4 discharges time lag characteristic measurement system, it is characterised in that：Institute
The hole depth for stating sound wave peephole (2), deep displacement and stress trajectory hole (5), drilling video recording drilling (10) is 2m, the sound wave
The aperture of peephole (2), deep displacement and stress trajectory hole (5), drilling video recording drilling (10) is 56mm.
6. buried high energy storage rock mass stress according to claim 1 discharges time lag characteristic measurement system, it is characterised in that：Often
Distance of a sound wave peephole (2) away from grooving (6) corresponding sides is equal and distance range is 50~80mm；The deep displacement and
Distance range of the stress trajectory hole (5) apart from grooving (6) right hand edge is 250~280mm, described drilling video recording drilling (10) distance
The distance range of grooving (6) left hand edge is 250~280mm；The distance phase of each bolthole (9) away from grooving (6) corresponding sides
Deng and distance range be 150~200mm.
7. buried high energy storage rock mass stress according to claim 1 discharges time lag characteristic measurement system, it is characterised in that：Institute
State in deep displacement and stress trajectory hole (5) that there are three displacement meter anchor head (14), three displacement meter anchor heads by setting of being in the milk
(14) it is separately positioned on the upper, middle and lower of deep displacement and stress trajectory hole (5).
8. a kind of released using buried high energy storage rock mass stress release time lag characteristic measurement system progress stress described in claim 1
Put time lag characteristic method for measuring, which is characterized in that it includes the following steps：
Step 1：Large scale rock sample (7) left and right side in situ to be measured is cut using joint-cutting method, it is big to form original position to be measured
Grooving (6) at left and right sides of scale rock sample (7), and the primary stress for carrying out large scale rock sample (7) in situ to be measured measures, and is enclosed
Initial plane stress level on rock horizontal plane；
Step 2：After the completion of position primary stress residing for original position large scale rock sample (7) to be measured measures, you can carry out other peripheries
Cutting, cutter are made to carry out opposite side synchronization, and substep is cut, and point three steps cutting completion, the depth of cut range of three steps is respectively 600
~800mm, 300~400mm, 300~400mm, using second displacement sensor (13.1) to surface in every step cutting process
Displacement measuring points (3) carry out large scale rock sample (7) surface displacement observation in situ to be measured；Using third displacement sensor (13.2) to depth
Portion's displacement and stress trajectory hole (5) carry out large scale rock sample (7) deep displacement observation in situ to be measured；It utilizes sonic test instrument (23)
Large scale rock sample (7) in situ to be measured is carried out to sound wave peephole (2) and cuts velocity of wave observation in unloading process；It utilizes strain gauge (16)
Large scale rock sample (7) cutting process medium and deep stress trajectory in situ to be measured is carried out to deep displacement and stress trajectory hole (5)；It utilizes
Bolt stress meters (17) carry out anchor in large scale rock sample (7) cutting process in situ to be measured to deep displacement and stress trajectory hole (5)
Stress in the bar variation observation；Large scale rock sample (7) in situ to be measured is carried out to drilling video recording drilling (10) using optical imaging instrument (24)
Rock sample crackle is observed in cutting process；Acoustic emission sensor (19) carries out original position to be measured to deep displacement and stress trajectory hole (5)
The sound emission space orientation of rock masses fracturing and injury tolerance observation in large scale rock sample (7) cutting process.
9. stress release time lag characteristic method for measuring according to claim 8, it is characterised in that：After the step 2 also
There is step 3：Computer (21) is by the initial plane stress level data, to be measured on the collected country rock horizontal plane of Acquisition Instrument (20)
Large scale rock sample (7) surface displacement in situ observes data, large scale rock sample (7) deep displacement in situ to be measured is observed, original position to be measured
Velocity of wave observation data, large scale rock sample (7) cutting process medium and deep in situ to be measured are answered in large scale rock sample (7) cutting unloading process
Power observes anchor stress variation observation data, large scale in situ to be measured in data, large scale rock sample (7) cutting process in situ to be measured
Rock sample crackle observes the sound of rock masses fracturing in data, large scale rock sample (7) cutting process in situ to be measured in rock sample (7) cutting process
Emission space positions and injury tolerance observes data, establishes various data respectively and changes with time relation curve, realizes buried height
Energy storage rock mass stress discharges time lag characteristic and measures.
10. stress release time lag characteristic method for measuring according to claim 8, it is characterised in that：In the step 1,
The primary stress that large scale rock sample (7) in situ to be measured is carried out using joint-cutting method is measured, and the initial plane on country rock horizontal plane is obtained
The specific method of stress level is：First to be measured when the primary stress that joint-cutting method carries out large scale rock sample (7) in situ to be measured measures
The left and right side of large scale rock sample (7) in situ is cut, that is, forms cutting at left and right sides of large scale rock sample (7) in situ to be measured
Slot (6) observes the second plane position by the first displacement sensor (13) on X axis datum point (11) and Y axis datum point (11.1)
The change in displacement for moving observation point (4.1) is observed, and is calculated, is obtained on country rock horizontal plane by formula (1), formula (2)
Initial plane stress level；
Wherein：L is the length of large scale rock sample (7) both sides grooving (6) in situ to be measured；X is second on the outside of grooving (6) right hand edge
For in-plane displancement observation point (4.1) away from grooving (6) the center line distance, y is the second plane position on the outside of grooving (6) posterior edges
Observation point (4.1) is moved away from grooving (6) the center line distance, Wx、WyRespectively two the second in-plane displancement observation points (4.1)
Deformation of the large scale rock sample (7) in situ to be measured on the directions plane x and y after corresponding side grooving (6) excision, σx、σyFor grooving
(6) primary stress, E are the elasticity modulus of large scale rock sample (7) in situ to be measured, and μ is the pool of large scale rock sample (7) in situ to be measured
Loose ratio.
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