CN109991315A - A kind of sound emission method and system differentiating engineering site different layers position lithology - Google Patents
A kind of sound emission method and system differentiating engineering site different layers position lithology Download PDFInfo
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- CN109991315A CN109991315A CN201910407284.9A CN201910407284A CN109991315A CN 109991315 A CN109991315 A CN 109991315A CN 201910407284 A CN201910407284 A CN 201910407284A CN 109991315 A CN109991315 A CN 109991315A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/14—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0232—Glass, ceramics, concrete or stone
Abstract
The present invention provides a kind of sound emission method and system for differentiating engineering site different layers position lithology, and acoustic emission system includes loading system, for generating axial compressive force to combination rock mass, makes to combine the energy inside rock mass and spreads out of combination rock mass in the form of sound wave；Rock mass is combined, combination rock mass in a rectangular parallelepiped shape, combines rock mass along short transverse and is uniformly divided into three layers；Monitoring system analyzes rock mass characteristic according to acoustic wave character for monitoring the sound wave emitted in combination rock mass；The present invention using rock mass during loading crack develop generate sound emission the phenomenon that, analyzed using waveform of the monitoring system to acoustic emission wave, the lithology of different location rock mass reflected according to waveform signal；The present invention uses self-programming software, two-dimensional power spectrum figure is transformed into sound emission original time-domain data, to more intuitively observe the dominant frequency value of sound emission；Equipment is simple, project amount is small needed for the method for judgement lithology provided by the invention, saves money, accuracy rate height.
Description
Technical field
The invention belongs to the monitorings of engineering site composed coal and rock body material properties and difference technical field, and in particular to one kind is sentenced
The sound emission method and system of other engineering site different layers position lithology.
Background technique
Coal and rock belongs to fragile material, due to the evolution in crack in load destructive process, has portion of energy with elasticity
The form of wave releases, and generates acoustic emission phenomenon.The characteristics of Acoustic Emission parameter of different lithology coal and rock material is different, in engineering
How scene determines that the property of some region of combination rock mass materials is always a problem.
At present during on-site construction, lithology observation method of comparison, test assay method etc. is usually taken, but use in the past these
Method has the characteristics that project amount is big, costly, accuracy rate is low.
Accordingly, it is desirable to provide a kind of send out for the insufficient sound for differentiating engineering site different layers position lithology of the above-mentioned prior art
System and method is penetrated, more effectively to explore engineering site confirmation different layers position different zones lithology, to the safety in the region
Property is assessed and is monitored.
Summary of the invention
The purpose of the present invention is to provide it is a kind of differentiate engineering site different layers position lithology acoustic emission system and method with
At least solve at present at the construction field (site) to rock mass lithology discriminant when, take lithology observation method of comparison, testization method project amount greatly, institute
Need it is costly, accuracy rate is low, waste of manpower and the technical issues of material resources.
To achieve the goals above, the invention provides the following technical scheme:
A kind of acoustic emission system differentiating engineering site different layers position lithology, it is preferable that the acoustic emission system includes,
Loading system passes the energy combined inside rock mass in the form of sound wave for generating axial compressive force to combination rock mass
The combination rock mass out；The loading system includes servo-pressing machine, and the servo-pressing machine is equipped with piston rod and plummer, institute
Piston rod is stated to be located above the combination rock mass；
Rock mass is combined, in a rectangular parallelepiped shape, the combination rock mass is uniformly divided into three layers along short transverse to the combination rock mass；Institute
Combination rock mass is stated to be located on the plummer；
Monitoring system analyzes rock mass characteristic according to acoustic wave character for monitoring the sound wave emitted in the combination rock mass；Institute
Stating monitoring system includes sound emission wideband probe, and multiple sound emission wideband probes are located at the outer surface of the combination rock mass.
A kind of acoustic emission system differentiating engineering site different layers position lithology as described above, it is preferable that the combination rock mass
Three layers of rock mass for including are followed successively by first layer rock mass, second layer rock mass and third layer rock mass from top to bottom；The first layer rock mass
For sandstone；The second layer rock mass is limestone；The third layer rock mass is magmatic rock.
A kind of acoustic emission system differentiating engineering site different layers position lithology as described above, it is preferable that the sound emission is wide
Frequency probe has 6 and 6 or more；
Preferably, the sound emission wideband probe has 6, and respectively the first sound emission wideband probe, the second sound emission are wide
Frequency probe, third sound emission wideband probe, falling tone transmitting wideband probe, fifth sound transmitting wideband probe, the 6th sound emission are wide
Frequency is popped one's head in；The first sound emission wideband probe is connected to the trailing flank of the first layer rock mass；The second sound emission wideband
Probe is connected to the left side of the first layer rock mass；The third sound emission wideband probe is connected to the first layer rock mass
Right side；The falling tone transmitting wideband probe is connected to the leading flank of the third layer rock mass；The fifth sound emits wideband
Probe is connected to the left side of the third layer rock mass；The 6th sound emission wideband probe is connected to the third layer rock mass
Right side；
More preferably, the sound emission wideband pops one's head in and is equipped with sound emission couplant between the outer wall for combining rock mass.
A kind of acoustic emission system differentiating engineering site different layers position lithology as described above, it is preferable that the monitoring system
Further include,
Preamplifier, for voice signal to be converted into electric signal；The input terminal of the preamplifier passes through signal
Line and sound emission wideband probe connect；The output end of the preamplifier is connected by signal wire with system host；
System host, for receiving, recording, show and storing electric signal；The system host includes sound emission acquisition
Module, signal processing module and data disaply moudle；The sound emission acquisition module output end is connect with signal processing module；Institute
Data disaply moudle will be passed to by signal wire after Electric signal processing by stating signal processing module.
A kind of acoustic emission system differentiating engineering site different layers position lithology as described above, it is preferable that the monitoring system
It further include simulation source；Whether the electric signal that the simulation source is used to detect each channel of sound emission receives normally；
Preferably, the simulation source is that pencil-lead that hardness is 2H fractures the signal of generation.
A kind of acoustic emission system differentiating engineering site different layers position lithology as described above, it is preferable that the combination rock mass
Upper and lower surfaces nonparallelism less than 0.02, so as to weaken it is described combination acoustic emission in rock body during generate make an uproar
Sound.
A kind of acoustic emission system differentiating engineering site different layers position lithology as described above, it is preferable that the loading system
It further include Loading Control System, the Loading Control System is connected with the servo-pressing machine, for controlling servo-pressing machine
Loading speed and time；
Preferably, the servo-pressing machine is single-axis servo press machine.
A kind of as above described in any item sound emission methods for differentiating engineering site different layers position lithology, it is preferable that the side
Method includes the following steps,
Step 1, preparation combination rock mass installs sound emission wideband probe, and detects whether each channel of sound emission receives
Normally；
Step 2, uniaxial loading, and synchronous progress acoustic emission monitor(ing) are carried out, sound emission data are obtained；
Step 3, sound emission data are analyzed and handled, spectrogram is obtained according to self-programming program.
The sound emission method as described above for differentiating engineering site different layers position lithology, it is preferable that the step 1 specifically includes
Following steps,
Step 11, it is prepared into combination rock mass materials test specimen with three kinds of rock mass that lithology is respectively A, B, C, combines the ruler of rock mass
Very little is 100mm × 50mm × 50mm；And polish combination rock mass materials upper and lower surface, make the upper and lower surfaces for combining rock mass
There is the nonparallelism lower than 0.02；
Step 12, test specimen is placed to the plummer of single-axis servo press machine；
Step 13, at least six sound emission wideband is popped one's head in and is pasted by sound emission couplant to the outer surface of combination rock mass
Different location；It is noted that at least 6 heads are arranged in all around four of combination rock mass when sound emission wideband Probe arrangement
Face, to meet to entire combination rock mass stereoscopic localized；
Step 14, after the completion of probe being arranged in the way of described in step 13, disconnected lead test is carried out on combination rock mass,
Whether the observation each channel signal of sound emission receives normally；Then the velocity of wave for obtaining the combination rock mass is tested by matrix, and will
The velocity of wave Input Monitor Connector system.
As described above differentiate engineering site different layers position lithology sound emission method, it is preferable that the step 3 specifically include as
Lower step,
Step 31, Acoustic Emission location data are analyzed, the Acoustic Emission location data of different layers position are distinguished；
Step 32, the Acoustic Emission location data of different layers position described in step 31 are transformed into Wave data；
Step 33, it is based on self-programming program, utilizes the sound emission to combination rock mass different layers position respectively of Matalab software
Data are converted, its spectrum information is obtained, and determine its dominant frequency value of different layers position by the maximum value on spectrogram；
Step 34, the different layers position dominant frequency value described in step 33 is handled using normalized method.
Compared with the immediate prior art, technical solution provided by the invention has following excellent effect:
The present invention using rock mass during loading crack develop generate sound emission the phenomenon that, using monitoring system to sound send out
The waveform of ejected wave is analyzed, and the lithology of different location rock mass is reflected according to waveform signal；Meanwhile the present invention is used from chief editor
Journey software, and software is written into self-designed program, two-dimensional power spectrum figure is transformed into sound emission original time-domain data, thus
More intuitively observe the dominant frequency value of sound emission；Equipment is simple, project amount is small needed for the method for judgement lithology provided by the invention,
It saves money, accuracy rate height.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.Wherein:
Fig. 1 is the sound emission wideband probe stereoscopic localized illustraton of model of the embodiment of the present invention；
Fig. 2 is that the sound emission original time-domain data of the embodiment of the present invention is transformed into two-dimensional power spectrum figure；
Fig. 3 is the sound emission dominant frequency datagram after the normalized of the embodiment of the present invention.
In figure: 1, combining rock mass；11, first layer rock mass；12, second layer rock mass；13, third layer rock mass；2, piston rod；3,
Plummer；41, the first sound emission wideband is popped one's head in；42, the second sound emission wideband is popped one's head in；43, third sound emission wideband is popped one's head in；44,
The falling tone emits wideband probe；45, fifth sound transmitting wideband probe；46, the 6th sound emission wideband is popped one's head in；5, preamplifier；
6, system host；7, signal wire.
Specific embodiment
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.It should be noted that in the feelings not conflicted
Under condition, the features in the embodiments and the embodiments of the present application be can be combined with each other.
In the description of the present invention, term " longitudinal direction ", " transverse direction ", "upper", "lower", "front", "rear", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "top", "bottom" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the present invention rather than require the present invention that must be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.Term used in the present invention " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected,
It may be a detachable connection；It can be directly connected, can also be indirectly connected by intermediate member, for the common of this field
For technical staff, the concrete meaning of above-mentioned term can be understood as the case may be.
According to a particular embodiment of the invention, as shown in Figure 1, combination rock mass 1 is placed on the carrying of single-axis servo press machine
On platform 3, guarantee the planarization of plummer 3.Starting up's Loading Control System, piston rod 2 are done under the impetus of hydraulic oil
Movement is attacked, pressure is applied to combination rock mass 1.As piston rod 2 moves axially downwards, slight crack can be generated inside rock mass 1 by combining
Until conquassation deformation.Combination rock mass 1 is surrounded by no less than six sound emission wideband probes, for collecting acoustic signals.Sound
Transmitting wideband probe answers three-dimensional arrangement, to meet the different three-dimensional position demands of combination rock mass 1.The probe connection of sound emission wideband is preposition
Acoustic signals are converted to electric signal by amplifier 5, preamplifier 5, are compared electric signal and are done enhanced processing.Then preamplifier
5 will treated that electric signal passes to system host 6.To information processing, software is based on user and provides from chief editor system host 6
Sound emission original time-domain data is converted into two-dimensional power spectrum figure by journey.The comparison for converting front and back is as shown in Figure 2.It can be with from figure
Find out, power spectral value highest point is its dominant frequency, and second is higher by as secondary dominant frequency.Dominant frequency is done into normalized, treated ties
Fruit is as shown in Figure 3.Figure three shows the relationship of frequency and amplitude.System host 6 provided by the invention has memory function, can be with
The rock mass of different kinds of rocks carries out load destruction, then stores to its characteristics of Acoustic Emission.Practical judgement is different at the construction field (site)
When the lithology of rock mass, the characteristic for the sound wave that can be generated by sound emission, judge the characteristic of rock mass, while can basis
Sound emission wideband probe position location, come judge different location rock mass lithology.
According to a particular embodiment of the invention, the present invention provides a kind of sound emission for differentiating engineering site different layers position lithology
System, acoustic emission system include,
Loading system makes to combine the energy inside rock mass 1 in the form of sound wave for generating axial compressive force to combination rock mass 1
Outflow combination rock mass 1.Loading system includes servo-pressing machine, and servo-pressing machine is equipped with piston rod 2 and plummer 3, and 2, piston rod
Above combination rock mass 1.2 upper end of piston rod is equipped with hydraulic cavities, and Hydrauservo System is controlled by loading system control system, controls
System by control piston rod 2 attack speed control to combination rock mass 1 load time.Preferably, servo-pressing machine is
Single-axis servo press machine.It should be noted that the lower end of the piston rod 2 for the single-axis servo press machine that the present invention uses is also connected with
Platen, the area of the cross section of platen are greater than the area of combination 1 upper surface of rock mass, to guarantee to push down the entire end of combination rock mass
Face generates downward axial force.Plummer 3 is round pie, and the area of cross section should also be as the end face face for being greater than combination rock mass 1
Product.
Rock mass 1 is combined, combination rock mass 1 in a rectangular parallelepiped shape, combines rock mass 1 along short transverse and is uniformly divided into three layers.Combine rock
Body 1 is located on plummer 3.Supporting body provides support force to combination rock mass 1 during loaded, as preferred side of the invention
Case, 3 center of plummer are equipped with rectangular recess, and rectangular recess is for holding combination rock mass 1.It is a degree of to avoid combination rock mass 1
Sidesway is generated during loaded.As a preferred solution of the present invention, the nonparallelism of the upper and lower surfaces of rock mass 1 is combined
Less than 0.02.To weaken the noise generated in combination 1 sound emission process of rock mass.
Monitoring system analyzes rock mass characteristic according to acoustic wave character for monitoring the sound wave emitted in combination rock mass 1.Monitoring
System includes sound emission wideband probe, and multiple sound emission wideband probes are located at the outer surface of combination rock mass 1.Sound emission wideband probe
For acquiring acoustic emission signal.As a preferred solution of the present invention, it is sent out between sound emission wideband probe and combination rock mass 1 by sound
Penetrate couplant paste it is connected.Sound emission couplant can be the material that vaseline, butter etc. can be coupled with sound emission.
According to a particular embodiment of the invention, three layers of rock mass that combination rock mass 1 includes are followed successively by first layer rock from top to bottom
Body 11, second layer rock mass 12 and third layer rock mass 13.First layer rock mass 11 is sandstone, and the lithology of first layer rock mass 11 is A.It is tied
Structure is stablized, usually in filbert or red, main siliceous, calcium, clay and iron oxide.Rock is by clast and chink two parts structure
At.Second layer rock mass 12 is limestone, and the lithology of second layer rock mass 12 is B.Limestone have good processability, polishability and very well
Bonding capacity, it is not soluble in water, be soluble in saturation sulfuric acid, can and various strong acid react and form corresponding calcium salt, simultaneously
Release CO2.It is decomposed when limestone is fired to 900 DEG C or more (generally 1000~1300 DEG C) and is converted into lime, release CO2.Quick lime
Torrent solution is met, forms white lime immediately, white lime can size mixing after being dissolved in water, in air easily hardening.Third layer rock mass 13 is rock
Magmatic rock, the lithology of third layer rock mass 13 are C.Magmatic rock is to spray earth's surface by magma or invade earth's crust cooled and solidified to be formed by rock
Stone has apparent mineral crystal particle or stomata, accounts for about the 65% of earth's crust total volume, and the 95% of gross mass.Magma is in the earth's crust
Red-hot, sticky, containing the volatile matter molten silicate body of the high temperature that depths or outer mantle generate, is to form various magmatic rocks and rock
Starch the parent in mineral deposit.
According to a particular embodiment of the invention, sound emission wideband probe is preferably, of the invention there are six more than
In specific embodiment, there are six sound emission wideband probes, and respectively the first sound emission wideband the 41, second sound emission wideband of probe is visited
First 42, third sound emission wideband probe 43, falling tone transmitting wideband probe 44, fifth sound transmitting wideband probe the 45, the 6th sound hair
Penetrate wideband probe 46.First sound emission wideband probe 41 is connected to the trailing flank of first layer rock mass 11.Second sound emission wideband is visited
First 42 are connected to the left side of first layer rock mass 11.Third sound emission wideband probe 43 is connected to the right side of first layer rock mass 11
Face.Falling tone transmitting wideband probe 44 is connected to the leading flank of third layer rock mass 13.Fifth sound transmitting wideband probe 45 is connected to
The left side of third layer rock mass 13.6th sound emission wideband probe 46 is connected to the right side of third layer rock mass 13.
Preferably, sound emission wideband pops one's head in and is equipped with sound emission couplant between the outer wall for combining rock mass 1.
Monitoring system according to a particular embodiment of the invention further includes,
Preamplifier 5, for voice signal to be converted into electric signal.The input terminal of preamplifier 5 passes through signal wire 7
It pops one's head in and connects with sound emission wideband.The output end of preamplifier 5 is connected by signal wire 7 with system host 6.
System host 6, for receiving, recording, show and storing electric signal.System host 6 includes that sound emission acquires mould
Block, signal processing module and data disaply moudle.Sound emission acquisition module output end is connect with signal processing module.Signal processing
Module will pass through signal wire 7 and pass to data disaply moudle after Electric signal processing.
Simulation source.Simulation source is for detecting whether each channel signal of sound emission receives normally.
Preferably, simulation source is that pencil-lead that hardness is 2H fractures the signal (i.e. disconnected lead test) of generation.
The present invention also provides a kind of method of sound emission for differentiating engineering site different layers position lithology, this method includes such as
Lower step,
Step 1, preparation combination rock mass 1 installs sound emission wideband probe, and detects whether each channel of sound emission receives
Normally.
Step 2, uniaxial loading, and synchronous progress acoustic emission monitor(ing) are carried out, sound emission data are obtained.
Step 3, sound emission data are analyzed and handled, spectrogram is obtained according to self-programming program.
According to a particular embodiment of the invention, step 1 specifically comprises the following steps,
Step 11, it is prepared into combination 1 material test specimen of rock mass with three kinds of rock mass that lithology is respectively A, B, C, combination rock mass 1
Having a size of 100mm × 50mm × 50mm.And polish combination 1 material upper and lower surface of rock mass, make the upper surface for combining rock mass 1 under
There is the nonparallelism lower than 0.02 on surface, and (nonparallelism is certain two described during we are daily for the depth of parallelism
Plane refers to being substantially parallel in parallel, that is, institute's nonparallelism is zero, and the upper and lower surfaces of rock mass are combined in the present invention
Nonparallelism less than 0.02, be conducive to weaken the noise that generates in loading procedure).
Step 12, test specimen is placed to the plummer 3 of single-axis servo press machine.
Step 13, at least six sound emission wideband is popped one's head in and pastes the outer surface of most distinguished rock mass by sound emission couplant
Different location.When sound emission wideband Probe arrangement it is noted that by 6 or more Probe arrangements in combination all around four of rock mass 1
Face, to meet to entire combination 1 stereoscopic localized of rock mass.
Step 14, after the completion of probe being arranged in the way of step 13, disconnected lead test is carried out on combination rock mass 1, is seen
Examine whether each channel signal of sound emission receives normally.Then the velocity of wave for obtaining the combination rock mass 1 is tested by matrix, and should
Velocity of wave Input Monitor Connector system.
According to a particular embodiment of the invention, step 3 specifically comprises the following steps,
Step 31, Acoustic Emission location data are analyzed, the Acoustic Emission location data of different layers position are distinguished.
Step 32, the Acoustic Emission location data of the different layers position of step 31 are transformed into Wave data.
Step 33, it is based on self-programming program, the sound of combination 1 different layers position of rock mass is sent out respectively using Matalab software
It penetrates data to be converted, obtains its spectrum information, its dominant frequency value of different layers position is determined by the maximum value on spectrogram.
Step 34, the different layers position dominant frequency value in step 33 is handled using normalized method.
The present invention also provides based on Matlab software programming, so that sound emission original time-domain data is transformed into two-dimentional function
The self-programming program of rate spectrogram, program are as follows:
In short, the present invention using rock mass during loading crack develop generate sound emission the phenomenon that, using monitoring system
The waveform of acoustic emission wave is analyzed, according to the lithology for reflecting different location rock mass of waveform signal；Meanwhile the present invention adopts
Software is written with self-programming software, and by self-designed program, two-dimentional power is transformed into sound emission original time-domain data
Spectrogram, to more intuitively observe the dominant frequency value of sound emission；Equipment needed for the method for judgement lithology provided by the invention is simple,
Project amount is small, saves money, accuracy rate height.
The above description is only a preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of sound emission method for differentiating engineering site different layers position lithology, which is characterized in that the method includes walking as follows
It is rapid:
Step 1, preparation combination rock mass installs sound emission wideband probe, and detects whether each channel of sound emission receives normally；
Step 2, uniaxial loading, and synchronous progress acoustic emission monitor(ing) are carried out, sound emission data are obtained；
Step 3, sound emission data are analyzed and handled, spectrogram is obtained according to self-programming program.
2. differentiating the sound emission method of engineering site different layers position lithology as described in claim 1, which is characterized in that the step
Rapid 1 specifically comprises the following steps:
Step 11, it is prepared into combination rock mass materials test specimen with three kinds of rock mass that lithology is respectively A, B, C, the size for combining rock mass is
100mm×50mm×50mm；And polish combination rock mass materials upper and lower surface, have the upper and lower surfaces for combining rock mass low
In 0.02 nonparallelism；
Step 12, test specimen is placed to the plummer of single-axis servo press machine；
Step 13, at least six sound emission wideband is popped one's head in and is pasted to the outer surface of combination rock mass not by sound emission couplant
Same position；It is noted that at least 6 heads to be arranged in four faces all around of combination rock mass when sound emission wideband Probe arrangement, with
Meet to entire combination rock mass stereoscopic localized；
Step 14, after the completion of probe being arranged in the way of described in step 13, disconnected lead test, observation are carried out on combination rock mass
Whether each channel signal of sound emission receives normally；Then the velocity of wave for obtaining the combination rock mass is tested by matrix, and by the wave
Fast Input Monitor Connector system.
3. differentiating the sound emission method of engineering site different layers position lithology as described in claim 1, which is characterized in that the step
3 specifically comprise the following steps:
Step 31, Acoustic Emission location data are analyzed, the Acoustic Emission location data of different layers position are distinguished；
Step 32, the Acoustic Emission location data of different layers position described in step 31 are transformed into Wave data；
Step 33, it is based on self-programming program, using Matalab software respectively to the sound emission data of combination rock mass different layers position
It is converted, obtains its spectrum information, its dominant frequency value of different layers position is determined by the maximum value on spectrogram；
Step 34, the different layers position dominant frequency value described in step 33 is handled using normalized method.
4. a kind of sound emission method as described in any one of claims 1 to 3 for differentiating engineering site different layers position lithology is adopted
Acoustic emission system, which is characterized in that the acoustic emission system includes:
Loading system makes the energy combined inside rock mass spread out of institute in the form of sound wave for generating axial compressive force to combination rock mass
State combination rock mass；The loading system includes servo-pressing machine, and the servo-pressing machine is equipped with piston rod and plummer, the work
Stopper rod is located above the combination rock mass；
Rock mass is combined, in a rectangular parallelepiped shape, the combination rock mass is uniformly divided into three layers along short transverse to the combination rock mass；Described group
Rock mass is closed to be located on the plummer；
Monitoring system analyzes rock mass characteristic according to acoustic wave character for monitoring the sound wave emitted in the combination rock mass；The prison
Examining system includes sound emission wideband probe, and multiple sound emission wideband probes are located at the outer surface of the combination rock mass.
5. a kind of acoustic emission system for differentiating engineering site different layers position lithology as claimed in claim 4, which is characterized in that institute
It states three layers of rock mass that combination rock mass includes and is followed successively by first layer rock mass, second layer rock mass and third layer rock mass from top to bottom；It is described
First layer rock mass is sandstone；The second layer rock mass is limestone；The third layer rock mass is magmatic rock.
6. a kind of acoustic emission system for differentiating engineering site different layers position lithology as claimed in claim 5, which is characterized in that institute
Stating sound emission wideband probe has 6 and 6 or more；
Preferably, the sound emission wideband probe has 6, and respectively the first sound emission wideband probe, the second sound emission wideband are visited
Head, third sound emission wideband probe, falling tone transmitting wideband probe, fifth sound transmitting wideband probe, the 6th sound emission wideband are visited
Head；The first sound emission wideband probe is connected to the trailing flank of the first layer rock mass；The second sound emission wideband probe
It is connected to the left side of the first layer rock mass；The third sound emission wideband probe is connected to the right side of the first layer rock mass
Face；The falling tone transmitting wideband probe is connected to the leading flank of the third layer rock mass；The fifth sound transmitting wideband probe
It is connected to the left side of the third layer rock mass；The 6th sound emission wideband probe is connected to the right side of the third layer rock mass
Face；
More preferably, the sound emission wideband pops one's head in and is equipped with sound emission couplant between the outer wall for combining rock mass.
7. a kind of acoustic emission system for differentiating engineering site different layers position lithology as claimed in claim 4, which is characterized in that institute
State monitoring system further include:
Preamplifier, for acoustic signals to be converted into electric signal；The input terminal of the preamplifier by signal wire with
The sound emission wideband probe connection；The output end of the preamplifier is connected by signal wire with system host；
System host, for receiving, recording, show and storing electric signal；The system host include sound emission acquisition module,
Signal processing module and data disaply moudle；The sound emission acquisition module output end is connect with signal processing module；The letter
Number processing module will pass to data disaply moudle by signal wire after Electric signal processing.
8. a kind of acoustic emission system for differentiating engineering site different layers position lithology as claimed in claim 7, which is characterized in that institute
Stating monitoring system further includes simulation source；Whether the electric signal that the simulation source is used to detect each channel of sound emission receives normally；
Preferably, the simulation source is that pencil-lead that hardness is 2H fractures the signal of generation.
9. a kind of acoustic emission system for differentiating engineering site different layers position lithology as claimed in claim 4, which is characterized in that institute
The nonparallelism of the upper and lower surfaces of combination rock mass is stated less than 0.02, is concentrated to reduce stress in loading procedure to result
The influence of generation.
10. a kind of acoustic emission system for differentiating engineering site different layers position lithology as claimed in claim 4, which is characterized in that
The loading system further includes Loading Control System, and the Loading Control System is connected with the servo-pressing machine, for controlling
The loading speed of servo-pressing machine and time；
Preferably, the servo-pressing machine is single-axis servo press machine.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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Cited By (2)
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| CN111636859A (en) * | 2020-07-09 | 2020-09-08 | 中煤科工集团重庆研究院有限公司 | Coal rock while-drilling self-identification method based on micro-fracture wave detection |
| CN111678994A (en) * | 2020-07-01 | 2020-09-18 | 山西宏安翔科技股份有限公司 | Acoustic emission sensing system and method |
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| CN109613121B (en) * | 2019-01-15 | 2020-12-29 | 华北理工大学 | Rock fracture acoustic emission and damage imaging integrated monitoring method |
| CN111189929A (en) * | 2020-01-13 | 2020-05-22 | 中国电建集团贵阳勘测设计研究院有限公司 | Rock mass drilling sound wave test block model and manufacturing method thereof |
| CN112525672B (en) * | 2021-01-21 | 2021-05-28 | 东北石油大学 | Shale reservoir brittleness testing device and method based on crack propagation energy evolution |
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