CN109406308A - For studying the experiment loading system of underground Rock Masses Fractures problem - Google Patents
For studying the experiment loading system of underground Rock Masses Fractures problem Download PDFInfo
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- CN109406308A CN109406308A CN201811539698.9A CN201811539698A CN109406308A CN 109406308 A CN109406308 A CN 109406308A CN 201811539698 A CN201811539698 A CN 201811539698A CN 109406308 A CN109406308 A CN 109406308A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
Abstract
The invention discloses a kind of for studying the experiment loading system of underground Rock Masses Fractures problem, suitable for current hard-rock tunnel.The present invention is based on the use of cantilevered impact development machine, main contents are that the strain near shock point is recorded and analyzed using foil gauge, are studied Fracture, the stress distribution law of rock heading face of rock mass etc. under specific impact variable.Experiment loading system power source of the invention comes from boom-type roadheader, rock fracture in dynamic indentation is based on, for studying rock fragmentation mechanisms；During experimental arrangement, foil gauge electrical measuring method is used；Further, foil gauge is spaced apart using shock point as the center of circle by circular arc direction is same.The present invention is based on practical stone drifting work, and device requirement power is low, flexible and changeable in actual strain piece placement process, can satisfy kinds of experiments requirement, have very big applicability.
Description
Technical field
The present invention is applied to rock gangway under mine, and the opening breakage problem for being related to rock heading face under mechanical shock acts on is ground
Study carefully, and in particular to a kind of for studying the experiment loading system of underground rock gangway Rock Masses Fractures problem under mechanical shock effect.
Background technique
The form of construction work of China's coal-mine stone drifting at this stage is mainly drilling and blasting method and mechanical drivage method, cantilevered impact driving
Important equipment of the machine as current mechanical drivage method, is gradually applied in hard-rock tunnel.However since China is in cantilevered
Upper technological achievement is insufficient in terms of development machine, underground operators when being worked mainly based on experience, when operating unit
Lack effective theoretical direction, boom-type roadheader often has opening difficulty, energy loss in the use process in rock gangway
Big problem, therefore construction efficiency rests on always very low level, the initial collapse and opening problem to rock mass are studied
It is of great significance.
In recent years, being constantly progressive with science and technology, domestic and international some researchers are set by advanced experiment
Standby such as Hopkinson bar and high dynamic strain indicator equipment have carried out the research of breakage problem of the rock under percussion, and
Certain achievement is achieved, there is certain directive significance to practical engineering application.But at present both at home and abroad about bump
Rock crushing research on effect is lower is less, and since there are larger gap, research conclusions pair for condition in laboratory and rock gangway
Rock gangway is open, and task instruction is insufficient, its maximum utility value has not been reached yet in current impact heading equipment.Therefore, having must
Actual condition is tested in rock gangway, to initial collapse and opening problem progress depth of the rock mass under mechanical shock effect
Enter research, this has important value for the opening speed and driving speed that improve rock gangway.
Based on presently, there are the problem of, the present invention devises a kind of disconnected for studying underground rock mass based on stone head
It splits and the experiment loading system for the problem that is open, for studying breakage problem.
Summary of the invention
Solved by the invention is that rock gangway impact driving opening is difficult, laboratory experiment conclusion is insufficient for actual condition guidance
The problem of, a kind of experiment loading system for studying underground Rock Masses Fractures problem is provided, for studying rushing in development machine drill steel
The stress distribution law of rock heading face when the lower shock point Fracture of the effect of hitting, opening, rock crushing chisel it is deep with impact
The changing rule etc. of variable.
The technical solution adopted in the present invention is as follows:
The experiment loading system of Rock Masses Fractures problem of the rock gangway under mechanical shock effect, including drill steel, foil gauge, signal
Line, deformeter, work station, explosion-proof camera.The present invention is based on use of the cantilevered impact development machine in rock roadway in coal mine, carrying out
Draw the circle and circular arc that several radiuses are gradually expanded by the center of circle of shock point before rock fracture in dynamic indentation, by foil gauge according to preset direction along
Several circular arcs carry out stickup laying, then carry out impact grinding to the central point by operation development machine.Impact grinding process
In, signal is reflected into deformeter by signal wire by foil gauge, and then deformeter by data record and is stored to work station.This is
System can collect the Stress distribution rule on the rock mass surface under the conditions of different frequency of impacts, impact force and the chisel depth of rock mass
Situation, to study drill steel input variable and dig into the relationship of behavior, the Fracture of rock mass, rock mass opening and neighbouring stress
The development law etc. of field distribution etc..
The experiment loading system, drill steel show as the form of hydraulic breaking hammer, are arranged in boom-type roadheader
In front of work department, drill steel can behave as quantitative difference in different equipment, may be configured as single armed list bores, single armed three bores,
Brill of two-arm four etc..
The experiment loading system, shock zone are located at the bottom position of rock heading face, and shock point is normally taken from punching
Hit on the right side of region, the beginnings shock point determine have lithology it is softer under conditions of can change, and then raising broken rock speed mentions
Rise working effect.
The experiment loading system, several radiuses will be drawn after starting shock point centered on shock point by, which determining, is gradually expanded
Circle and circular arc, several circles can according to different lithology be arranged spacing.
The experiment loading system, the circle near shock point can be used to observe Rock Masses Fractures situation, shock point periphery
Circular arc be used to determine strain gauge adhesion position.
The experiment loading system, foil gauge are pasted onto using shock point as on the circular arc in the center of circle according to setting, same circle
Foil gauge spacing on arc is identical, and the strain gauge adhesion position and quantity can change, and can be the numerical simulation of experiment
Comparison is provided.
The experiment loading system needs to polish to rock mass surface before pasting foil gauge.
The experiment loading system, foil gauge on rock mass surface can connection signal line, draw signal wire access strain
Channel on instrument, the deformeter can according to need the demand of measurement points to select the deformeter of different numbers of channels.
The experiment loading system is connected with work station after deformeter, can analyze under experimental conditions data, and
Data are stored.
The experiment loading system needs constantly to be broken feelings to impact position with explosion-proof camera during testing progress
Condition is taken pictures, for observing basic crack conditions.
The experiment loading system, in view of conditions down-hole, work station is needed using own power source.
The experiment loading system, all installations and instrument are needed by explosion-proof check and safety certification.
Experiment loading system application of the invention is expected generate the utility model has the advantages that
This experimental system is tried in actual stone head based on boom-type roadheader employed in hard-rock tunnel
It tests, where combining the advantage of foil gauge electrical measurement, Rock Masses Fractures under the conditions of different frequency of impacts, impact force can be determined and opened
Rule is strained during mouthful, and drill steel input variable and rock mass opening and neighbouring stress field can be then calculated out by equation
The affecting laws of distribution, the promotion for boom-type roadheader rock breaking efficiency provide theoretical foundation.
Detailed description of the invention
Fig. 1 is the principle schematic diagram of the embodiment of the present invention；
Fig. 2 is tunnel applicable elements schematic diagram of the invention；
Fig. 3 is the working region and cloth hole position view of one embodiment of the present of invention；
Fig. 4 is the working region and cloth hole position view of one embodiment of the present of invention.
Each number designation indicates in figure:
1, drill steel, 2, working face, 3, shock zone, 4, starting shock point, 5, foil gauge, 6, signal wire a, 7, super dynamic answers
Become instrument, 8, signal wire b, 9, work station.
Specific embodiment
It, below will be detailed where technical solution and advantage in order to further describe experiment loading system of the present invention
The embodiment of the present invention is described, the content of the experiment loading system and element description represent in the accompanying drawings, need to illustrate
It is that described embodiment is a part of the embodiment of the application, instead of all the embodiments.Based on the implementation in the application
Example, other embodiments obtained belong to one of ordinary skilled in the art without making creative work
The range of the application protection.
An experiment loading system embodiment shown in -4 referring to Fig.1, for studying the experiment of underground Rock Masses Fractures problem
Loading system, composition include drill steel end 1, drill steel, 2, tunnel working face, 3, shock zone, 4, starting shock point, 5, strain
Piece, 6, signal wire a, 7, deformeter, 8, signal wire b, 9, work station.
The structure principle chart of this loading system shown in referring to Fig.1, the drill steel 1 are set to the head of boom-type roadheader
The end in portion, drill steel 1 is connected with development machine work department vibration source, and vibration mode is presented as that piston acts on the strike of drill steel 1, work
It is presented as that drill steel 1 acts on the vibratory impulse in rockwork face as form.
Further, pass through the vibration frequency and impact force of the adjusting adjustable drill steel 1 of development machine work department.
In content set forth in the present invention, input variable of the vibration frequency and impact force of drill steel 1 as drill steel 1 is used
It is analyzed in the crack conditions of the test content and impact position that combine foil gauge 5.
Referring to applicable elements schematic diagram in tunnel shown in Fig. 2, in working face 2, for the ease of further being broken after opening
Initial impact position, is set to the bottom of working face 2, i.e., shock zone 3 shown in Fig. 2 by rock work.
Further, starting shock point 4 is selected from shock zone 3.The starting shock point 4 under different conditions may be used in lithology
To change, referring to Fig. 3, starting shock point 4 has been selected in 3 right side of shock zone, and referring to Fig. 4, starting shock point 4 has been selected in impact zone
The middle position in domain 3.
Referring to Fig.1, Fig. 3 draws the circle that several radiuses are gradually expanded, around starting shock point 4 for observing shock point
Neighbouring rock fracture situation, can do the circle of several different numbers under different conditions.
It should be noted that impact work progress during, need using explosion-proof camera to impact position near
Rock fracture situation carries out sampling of taking pictures, and the circle that the integrated degree by observing each circle changes, radius is different is in synchronization
Integrated degree comparison, can the fracture variation issue tentatively to rock mass do an elaboration.
Further, the periphery of above-mentioned circle continue picture it is several with the shock point 4 for the circular arc line in the center of circle, pressed on camber line
The paste position for a little determining foil gauge 5 is taken according to diagramatic way.
Further, it polishes paste position, to guarantee the sticking effect of foil gauge 5, foil gauge 5 is pasted onto
It states on camber line, the stickup direction of foil gauge 5 is consistent to the starting line direction of shock point 4 with diagram affixed points.
It is of the same race for the ease of being characterized in it should be noted that foil gauge 5 is pasted on working face in the manner described above
In the case of rock surface ess-strain transfer law, above-mentioned circular arc line when underground is difficult to draw, can by
Interior carries out simulation and positioning to working face in the pit, and the paste position of foil gauge 5 is directly marked in underground.
Further, signal wire a 6 is connected with after foil gauge, signal wire a 6 is accessed in the channel of deformeter 7, then
By signal by the connection of signal wire b 8 work station 9, work station 9 can be analyzed and be stored to acquisition data deformeter 7.
The work station is presented as the form of personal computer in underground, the limitation in view of conditions down-hole for power, small-sized
Work station is needed using self-contained battery.
Above-mentioned all devices and material are required to through explosion-proof check and safety certification before experiment.
Referring to Fig.1, the working region of one embodiment shown in Fig. 3 and cloth hole position view, according to above-described
Loading system is tested, the experimental method of research underground Rock Masses Fractures rule is specifically described:
Firstly, determine shock zone 3 in rock mass working face 2 and choose starting shock point 4, shock zone in the present embodiment
3 are located at 2 bottom of working face, and starting shock point 4 is located at the right side of shock zone 3, is marked at initial point.
Be that several complete circles and circular arc are nearby done in the center of circle with initial impact point 4, draw in the present embodiment there are three circle and
Three circular arcs.
Then, the equally spaced stickup chosen several points and carry out foil gauges 5 on the camber line of each circle, it is every in the present embodiment
Three paste positions of equally spaced selection on a circular arc carry out grinding process to each paste position.
Foil gauge 5 is set according to the line direction of initial impact point 4 to paste position, the induction direction of foil gauge 5 is set
It is set to above-mentioned line direction, 5 spacing of the foil gauge setting on same circular arc is identical.
It is opened with the connection foil gauge 5 of signal wire a 6 and deformeter 7 with the connection deformeter 7 of signal wire b 8 and work station 9
Test software is adjusted and tests to signal collection situation.
It is arranged finally, carrying out frequency and impact force to development machine, drill steel 1 is then operated on the basis of the setting parameter to rising
Beginning shock point 4 carries out impact grinding, draws circle to shock point 4 and nearby using explosion-proof camera and shoots, right by work station 9
The data got are accepted or rejected and are stored.
After the completion of impact opening experiment under the above conditions, need to complete remaining catalase until exposing one again
A complete working face changes the frequency and impact force of development machine, and continuation starts to rush according to above-mentioned starting impact position
Experiment is hit, the experimental variable is the frequency and impact force of development machine.
In conjunction with Fig. 4, the experimental variable of this experimental system can also take different starting impact positions, to study different positions
The stress and strain distributing disciplinarian of rock mass working face under the percussion set.
It should be noted that only being chosen for foil gauge position and quantity, starting impact position based on above elaboration
Description cannot be interpreted as limitation of the present invention, and staff in the art can be right under different conditions in experiment demand
Quantity and position are modified.
The experiment loading system of research underground Rock Masses Fractures problem under mechanical shock effect according to an embodiment of the present invention,
It is described that the above are present invention experiment loading system is discussed in detail.
Although having shown and having described the embodiment of experiment loading system of the invention and specifically applying for embodiment above
Work method, it is to be understood that be above it is illustrative, be not considered as limiting the invention, on this basis can be with
It makes having according to actual demand and targetedly adjust, to obtain different embodiments.
Claims (6)
1. the experiment loading system for studying underground Rock Masses Fractures problem, which is characterized in that loading system, which forms, includes:
Drill steel is impacted, end is fixed on driving chain-drive section, provides vibratory impulse power；
Strain-ga(u)ge transducer is pasted on rock heading face, is connected to deformeter by signal wire；
Deformeter and work station, reception and analysis for data；
Signal wire is several, for transmitting signal between sensor and instrument.
2. according to claim 1 for studying the experiment loading system of underground Rock Masses Fractures problem, it is characterised in that
Using the frequency of drill steel and impact force as input variable.
3. according to claim 1 for studying the experiment loading system of underground Rock Masses Fractures problem, it is characterised in that
The circle and circular arc that several radiuses are gradually expanded are drawn around shock point.
4. according to claim 3 for studying the experiment loading system of underground Rock Masses Fractures problem, it is characterised in that
Foil gauge is pasted on circular arc at equal intervals.
5. according to claim 4 for studying the experiment loading system of underground Rock Masses Fractures problem, it is characterised in that answer
The induction direction for becoming piece is consistent with the line direction of paste position to shock point.
6. according to claim 1 for studying the experiment loading system of underground Rock Masses Fractures problem, it is characterised in that rise
The different location of beginning shock point can be used as experiment initializaing variable.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811539698.9A CN109406308A (en) | 2018-12-17 | 2018-12-17 | For studying the experiment loading system of underground Rock Masses Fractures problem |
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| CN201811539698.9A CN109406308A (en) | 2018-12-17 | 2018-12-17 | For studying the experiment loading system of underground Rock Masses Fractures problem |
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| CN108709931A (en) * | 2018-02-22 | 2018-10-26 | 武汉理工大学 | The laboratory test system and method for stress wave propagation rule in the jointed rock mass of deep |
| CN108801815A (en) * | 2018-07-02 | 2018-11-13 | 中国矿业大学(北京) | A kind of electrical measurement of dynamic load-loading by means of digital image correlation method synchronizes experimental system and method |
| CN209525202U (en) * | 2018-12-17 | 2019-10-22 | 中国矿业大学(北京) | For studying the experiment loading system of underground Rock Masses Fractures problem |
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2018
- 2018-12-17 CN CN201811539698.9A patent/CN109406308A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104020060A (en) * | 2014-06-19 | 2014-09-03 | 中国矿业大学 | Ball mill impact collision simulation test bed and ball mill impact collision simulation method |
| CN104990777A (en) * | 2015-07-09 | 2015-10-21 | 中国矿业大学 | Impact damage rock sample preparation and assay method based on SHPB test |
| CN106323208A (en) * | 2016-08-05 | 2017-01-11 | 湖南科技大学 | Strain gauge adhesion position determining method in stratified rock shock pressing rod test |
| CN107314933A (en) * | 2017-06-20 | 2017-11-03 | 山东科技大学 | Under dynamic and sound combined load in coal petrography assembly coal dynamic characteristic test method |
| CN108709931A (en) * | 2018-02-22 | 2018-10-26 | 武汉理工大学 | The laboratory test system and method for stress wave propagation rule in the jointed rock mass of deep |
| CN108195682A (en) * | 2018-03-02 | 2018-06-22 | 华北科技学院 | For the experimental rig and its test method of the research of coal petrography tunnel mesomechanics |
| CN108801815A (en) * | 2018-07-02 | 2018-11-13 | 中国矿业大学(北京) | A kind of electrical measurement of dynamic load-loading by means of digital image correlation method synchronizes experimental system and method |
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