CN202351236U - Optical measurement mechanics experimental apparatus for simulating deep rock blast cracking - Google Patents

Optical measurement mechanics experimental apparatus for simulating deep rock blast cracking Download PDF

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Publication number
CN202351236U
CN202351236U CN201120458180XU CN201120458180U CN202351236U CN 202351236 U CN202351236 U CN 202351236U CN 201120458180X U CN201120458180X U CN 201120458180XU CN 201120458180 U CN201120458180 U CN 201120458180U CN 202351236 U CN202351236 U CN 202351236U
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China
Prior art keywords
test specimen
base plate
optical measurement
push pedal
blast
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Expired - Fee Related
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CN201120458180XU
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Chinese (zh)
Inventor
杨立云
杨仁树
许�鹏
郭东明
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China University of Mining and Technology CUMT
China University of Mining and Technology Beijing CUMTB
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China University of Mining and Technology Beijing CUMTB
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Abstract

The utility model discloses an optical measurement mechanics experimental apparatus for simulating deep rock blast cracking. The optical measurement mechanics experimental apparatus comprises a static loading system and a blast loader, wherein the static loading system can carry out test piece stress loading in horizontal and vertical directions, and the blast loader is used for generating dynamic load. The static loading system comprises a vertically arranged base plate and a pressure supply system, four push plates are distributed on one side of the base plate in upper, lower, left and right directions, and the pressure supply system respectively provides pressure for the push plates in the upper, left and right directions. The push plates clamp a test piece during moving, the blast loader applies dynamic load to the test piece, thus an initial static stress field in a deep rock mass and a dynamic stress field generated in a blast process are really simulated, an optical measurement mechanics experiment method is combined, observation of situations of blast cracking, crack propagation and the like of a rock mass under deep highland stress is realized, and a simple and convenient practical device is provided for a scientific and exact research.

Description

A kind ofly be used to simulate the deep rock explosion and cause the optical measurement mechanics experimental provision that splits
Technical field
The utility model relates to a kind of optical measurement mechanics experimental provision, relates in particular to that a kind of explosion causes and splits the optical measurement mechanics experimental provision that carries out physical simulation experiment to deep rock.
Background technology
Rock mass is long-term geochronic product, under native state, has primary stresss such as gravity stress and tectonic stress, so any dynamic load effect that rock mass receives all is the effect on certain static stress field exists.Dynamic Fracture process and the static stress field of rock mass under the dynamic load effect has correlativity.Such as the digging laneway of constructing in Deep Mine borehole blasting, the initial static stress field that the highland is cut down output living will have an immense impact on to the phenomenon of rupture of rock under the blast load and the propagation law of quick-fried living crackle, and its initial static stress field effect can not be ignored.
At present; In physics explosion model test; The boundary condition of model is free boundary condition mostly, and this theory of blasting for rock mass under the research high confining pressure has certain limitation, is especially adopting blast charger and optical measurement mechanics experimental technique (as moving photoelastic, moving caustic etc.) to carry out in the research of explosion phenomenon of rupture and mechanism; Adopt the two dimensional surface model test piece; Not having constraint around the test specimen, can't the true reappearance deep rock mass be that the blast of rock causes and splits rule and mechanism under the high-ground stress, can not carry out science, comprehensively analyze and study the propagation law of crackle in the blast dynamic stress field.
For reaching the real simulation geologic structure, initial static stress field effect is fully taken into account in the simulation test condition, accurately reproduce rock mass and under dynamic load, cause the process of splitting, the spy has invented this experimental provision.
Summary of the invention
In view of the deficiency of above-mentioned existing experimental provision, the purpose of the utility model is to cause the problem of splitting to the blast of deep rock, and a kind of the simulated deep terrestrial stress that combines with optical measurement mechanics and the experimental provision of blast load are provided.
A kind ofly be used to simulate the deep rock explosion and cause the optical measurement mechanics experimental provision that splits, comprise that one can be carried out the static loading system that test specimen stress loads along level and vertical direction, and the blast charger that is used to produce dynamic load; Said static loading system comprises a base plate of vertically placing, in four push pedals that four direction distributes along upper and lower, left and right of base plate one side, and be respectively, voltage supply system that left and right three direction push pedals provide pressure; Said base plate middle part has through hole, and push pedal bottoms last, left and right three directions are movably connected on the base plate, and the push pedal of bottom direction is fixed on the base plate, and test specimen is fixed between four push pedals; The loading end of said blast charger is carried in from the both sides correspondence on the big gun hole at test specimen middle part through the through hole on the base plate, and the other end of blast charger is fixed in the push pedal of bottom direction.
Said voltage supply system comprises three cylinders, tensimeter, valve and air compressor, and said three cylinders are connected in parallel, and the cylinder pole pair of three cylinders should be connected, in the push pedal of left and right three directions; Said tensimeter and valve are connected on the connecting line between air compressor and the parallelly connected cylinder.
Also be connected with branch control valve on the parallel branch of said three cylinders respectively and divide the governor pressure table.
The surface that said push pedal contacts with test specimen is provided with groove, and test specimen limit portion is stuck in the groove.
The outer side surface that said push pedal contacts with test specimen is provided with the card rib, and the card rib contacts with the test specimen outside surface, and the test specimen inside surface is close on the base plate.
Saidly go up, also be provided with groove along moving direction on the push pedal body of left and right direction, be inserted with bolt in the groove, bolt is connected between base plate and the push pedal.
The utility model is described to be used for the advantage that the deep rock blast causes the optical measurement mechanics experimental provision that splits and to be: after this experimental provision is adopted in (1); Can change the boundary condition of areal model test specimen; Test specimen is applied confined pressure, realized the simulation of deep rock mass stress field; (2) can regulate and control confined pressure loading procedure around the test specimen, can change the force value of level and vertical all directions, be applicable to the simulation of multiple stress field; (3) adopt card rib or groove that test specimen is held, guaranteed the reliability and the dirigibility that hold simultaneously, also can make blast load in the test specimen plane, produce the dynamic stress field, realize that deep rock is exploded to cause the true reappearance of the process of splitting.(4) this device is specially adapted to the moving caustic in the optical measurement mechanics experiment and moves the photoelastic experiment that waits, and for the blast of research deep rock mass causes rule and the mechanism split reliable experimental facilities is provided; (5) whole experiment device is simple in structure, easy to operate, is easy to realize and safeguard.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is that the A-A of Fig. 1 is to cut-open view.
Embodiment
The center of the utility model is: the mode with experiment applies confined pressure to test specimen; Terrestrial stress in the simulation deep rock; In the test specimen model, produce the initial static stress field,, and adopt the optical measurement mechanics method that blast is caused the process of splitting and observe then through explosion test; To reach the research deep is explosion phenomenon of rupture and the mechanism that rock mass is depressed on the highland, for geology is excavated and blasting process provides scientific basis.
Below in conjunction with accompanying drawing 1, Fig. 2 the utility model is done further to describe in detail:
A kind ofly be used to simulate the deep rock explosion and cause the optical measurement mechanics experimental provision that splits, mainly comprise two parts: a part is one can carry out the static loading system that test specimen stress loads along level and vertical direction; Another part is the blast charger 10 that is used to produce dynamic load.Static loading system is used to simulate the terrestrial stress phenomenon of deep rock, forms the initial static stress field of test specimen.Blast charger 10 is used for the loading and the control of test specimen 11 explosion tests, makes test specimen 11 produce blast and causes the process of splitting, to realize observation and the research to causing the process of splitting.
Static loading system comprises a square base plate 7 of vertically placing, and four direction is distributed with four push pedals 9 along upper and lower, left and right in base plate 7 one sides, and be respectively, voltage supply system that left and right three direction push pedals provide pressure.Push pedal bottoms last, left and right three directions are movably connected on the base plate 7, and can move along base plate 7.The push pedal of bottom direction is fixed on the base plate 7, and test specimen 11 is fixed between four push pedals 9.
Wherein, need for ease of the installation of blast charger 10 and the observation of optical measurement mechanics experimental provision, also have through hole 8 at base plate 7 middle parts, the big I of through hole 8 is decided according to the size of sample dimensions and blast charger 10 and optical measurement mechanics experimental provision.Because in the loading procedure; Push pedals last, left and right three directions need be moved along base plate 7, so on the push pedal body of last, left and right three directions, also be provided with groove 12 along moving direction, are inserted with bolt in the groove 12; Bolt one end is fixed on the base plate 7; The other end passes groove 12 backs and is connected with push pedal 9, and groove 12 has guaranteed also can receive when push pedal 9 is moved the restriction of screw rod, prevents that moving direction from deflecting; And after moving into place, bolt also can be realized being fixedly connected of 7 of push pedal 9 and base plates.
The voltage supply system comprises three cylinders 6, three branch control valves 4, three branch governor pressure tables 5, and is connected general pressure table 3 and the total valve 2 on the air compressor 1 output main line.Three cylinders 6 are connected in parallel, and divide control valve 4 and divide governor pressure table 5 to be connected into corresponding respectively being connected on the parallel branch of three cylinders 6 after three groups, directly show and controls three cylinders, 6 work on the branch road, adjust the size of pressure.The cylinder pole pair of three cylinders 6 should be connected, the push pedal back of left and right three directions; Driving these three direction push pedals moves on base plate 7; Thereby in the plane of test specimen 11, form the initial static stress field, realized test specimen 11 simulation of terrestrial stress on the direction in the horizontal and vertical direction.
The loading end of blast charger 10 is carried in from the both sides correspondence on the big gun hole at test specimen 11 middle parts through the through hole on the base plate 78, and the other end of blast charger 10 is fixed in the push pedal of bottom direction.
For further improving the reliability of push pedal 9 loading specimens 11 and the stability in blast process; The outer side surface that contacts with test specimen 11 in push pedal 9 is provided with card rib 13; Card rib 13 contacts with test specimen 11 outside surfaces and test specimen 11 outsides is held, and test specimen 11 inside surfaces then are close on base plate 7 surfaces.Base plate 7 surfaces fully contact with test specimen 11 surfaces, have increased the stability that test specimen 11 is installed, and simultaneously, card rib 13 also can make the blast of test specimen 11 cause the process of splitting and planar load.Certainly; Card rib 13 in the push pedal 9 also can be transformed into the groove design of push pedal 9 and test specimen 11 surface in contacts; Test specimen 11 limit portions directly are stuck in the groove of push pedal 9 sides, and the supported on both sides face through groove makes test specimen 11 chuckings, and the degree of depth of groove can be set as required.
In the experiment, at first choose test specimen 11, test specimen 11 is of a size of 300mm*300mm*5mm, offers the big gun hole in test specimen 11 centers, and blasthole diameter is 6mm, and the explosive of filling appropriate amount.Then, unclamp, the bolt in the left and right direction push pedal, promote push pedal, test specimen 11 is placed between the push pedal 9 of four direction, and test specimen 11 back sides contact with base plate 7 surfaces to cylinder 6 one side shiftings.Then, open three branch control valves 4 and total valve 2, open air compressor 1; Constantly with in the air suction air hold-up vessel; Air pressure rises gradually, and the cylinder bar promotes upward, the push pedal of left and right three directions is moved, in conjunction with fixed lower direction push pedal; The push pedal 9 of four direction utilizes card rib 13 that test specimen 11 is held, and makes the periphery generation of test specimen 11 be uniformly distributed with confined pressure.At any time note general pressure table 3 and the reading that divides on the governor pressure table 5, remain on 0-0.8MPa between the pressure zone.When reading reaches desired value, close three branch control valves 4 and total valve 2 successively, and tighten the bolt in the push pedal groove 12 simultaneously, 7 maintenances of push pedal 9 and base plate are fixedly connected, guarantee that the even distributed force that 9 pairs of test specimens 11 of push pedal apply is a steady state value.Because test specimen 11 limit portions are stuck in the card rib 13 of push pedal 9, guaranteed that the blast dynamic load planar carries out.Follow, debugging blast charger 10 is carried on the big gun hole at test specimen 11 middle parts the loading end of blast charger 10 from the both sides correspondence, guarantee that the big gun hole plug is closely knit in the test specimen 11 again.The optical measurement mechanics experimental provision is then aimed at test specimens 11 through through hole 8, and the optical measurement mechanics experimental provision is experimental provision such as moving photoelastic or moving caustics like: transmission-type.At last, detonating powder causes to the blast of test specimen 11 that the process of splitting is observed and record, and experiment is unloaded the pressure on the carrier gas cylinder 6 after accomplishing, and unclamps the bolt in the groove 12, takes off test specimen 11 and gets final product.
The above; Be merely the preferable embodiment of the utility model; But the protection domain of the utility model is not limited thereto; Any technician who is familiar with the present technique field is in the technical scope that the utility model discloses, and the variation that can expect easily or replacement all should be encompassed within the protection domain of the utility model.

Claims (6)

1. one kind is used to simulate the deep rock explosion and causes the optical measurement mechanics experimental provision that splits, and it is characterized in that, comprises that one can be carried out the static loading system that test specimen stress loads along level and vertical direction, and the blast charger that is used to produce dynamic load; Said static loading system comprises a base plate of vertically placing, in four push pedals that four direction distributes along upper and lower, left and right of base plate one side, and be respectively, voltage supply system that left and right three direction push pedals provide pressure; Said base plate middle part has through hole, and push pedal bottoms last, left and right three directions are movably connected on the base plate, and the push pedal of bottom direction is fixed on the base plate, and test specimen is fixed between four push pedals; The loading end of said blast charger is carried in from the both sides correspondence on the big gun hole at test specimen middle part through the through hole on the base plate, and the other end of blast charger is fixed in the push pedal of bottom direction.
2. as claimed in claim 1ly a kind ofly be used to simulate the deep rock explosion and cause the optical measurement mechanics experimental provision that splits; It is characterized in that; Said voltage supply system comprises three cylinders, tensimeter, valve and air compressor; Said three cylinders are connected in parallel, and the cylinder pole pair of three cylinders should be connected, in the push pedal of left and right three directions; Said tensimeter and valve are connected on the connecting line between air compressor and the parallelly connected cylinder.
3. as claimed in claim 2ly a kind ofly be used to simulate the deep rock explosion and cause the optical measurement mechanics experimental provision that splits, it is characterized in that, also be connected with branch control valve on the parallel branch of said three cylinders respectively and divide the governor pressure table.
4. as claimed in claim 1ly a kind ofly be used to simulate the deep rock explosion and cause the optical measurement mechanics experimental provision that splits, it is characterized in that the surface that said push pedal contacts with test specimen is provided with groove, test specimen limit portion is stuck in the groove.
5. as claimed in claim 1ly a kind ofly be used to simulate the deep rock explosion and cause the optical measurement mechanics experimental provision that splits; It is characterized in that; The outer side surface that said push pedal contacts with test specimen is provided with the card rib, and the card rib contacts with the test specimen outside surface, and the test specimen inside surface is close on the base plate.
6. as claimed in claim 1ly a kind ofly be used to simulate the deep rock explosion and cause the optical measurement mechanics experimental provision that splits; It is characterized in that; Saidly go up, also be provided with groove along moving direction on the push pedal body of left and right direction, be inserted with bolt in the groove, bolt is connected between base plate and the push pedal.
CN201120458180XU 2011-11-18 2011-11-18 Optical measurement mechanics experimental apparatus for simulating deep rock blast cracking Expired - Fee Related CN202351236U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102539650A (en) * 2011-11-18 2012-07-04 中国矿业大学(北京) Photodetection mechanics test device for simulating deep rock explosion cracking
CN102879549A (en) * 2012-09-29 2013-01-16 重庆大学 Three-way load large-scale three-dimensional analog simulation test system
CN104749611A (en) * 2013-12-26 2015-07-01 中国矿业大学(北京) Experiment method for simulating disaster induced by explosion of deep tunnel
CN105527182A (en) * 2016-01-11 2016-04-27 中国人民解放军理工大学 Explosion load simulation generator for simulating stress conditions of deep rock mass
CN105865907B (en) * 2016-06-22 2018-06-05 广西大学 A kind of true triaxial test fixture for energetic disturbance type rock burst simulation

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102539650A (en) * 2011-11-18 2012-07-04 中国矿业大学(北京) Photodetection mechanics test device for simulating deep rock explosion cracking
CN102539650B (en) * 2011-11-18 2014-07-09 中国矿业大学(北京) Photodetection mechanics test device for simulating deep rock explosion cracking
CN102879549A (en) * 2012-09-29 2013-01-16 重庆大学 Three-way load large-scale three-dimensional analog simulation test system
CN102879549B (en) * 2012-09-29 2015-07-08 重庆大学 Three-way load large-scale three-dimensional analog simulation test system
CN104749611A (en) * 2013-12-26 2015-07-01 中国矿业大学(北京) Experiment method for simulating disaster induced by explosion of deep tunnel
CN105527182A (en) * 2016-01-11 2016-04-27 中国人民解放军理工大学 Explosion load simulation generator for simulating stress conditions of deep rock mass
CN105527182B (en) * 2016-01-11 2017-03-08 中国人民解放军理工大学 A kind of blast load simulative generator for simulating deep rock mass stress
CN105865907B (en) * 2016-06-22 2018-06-05 广西大学 A kind of true triaxial test fixture for energetic disturbance type rock burst simulation

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C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120725

Termination date: 20121118