CN109141518A - A kind of big stage afterwards filling body unstable failure test device of unilateral exposure and method - Google Patents

A kind of big stage afterwards filling body unstable failure test device of unilateral exposure and method Download PDF

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Publication number
CN109141518A
CN109141518A CN201810748787.8A CN201810748787A CN109141518A CN 109141518 A CN109141518 A CN 109141518A CN 201810748787 A CN201810748787 A CN 201810748787A CN 109141518 A CN109141518 A CN 109141518A
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China
Prior art keywords
obturation
filling body
unilateral
intelligent
axial
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CN201810748787.8A
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Chinese (zh)
Inventor
徐文彬
程世康
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China University of Mining and Technology Beijing CUMTB
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China University of Mining and Technology Beijing CUMTB
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Priority to CN201810748787.8A priority Critical patent/CN109141518A/en
Publication of CN109141518A publication Critical patent/CN109141518A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00Measuring or testing not otherwise provided for
    • G01D21/02Measuring two or more variables by means not covered by a single other subclass

Abstract

The present invention relates to a kind of big stage afterwards filling body unstable failure test devices of unilateral side exposure and method, the device to be made of test specimen control system, stress loading system and displacement data acquisition system.Apparatus main body is made of pedestal, axial reaction component, screw rod, screw thread, in the top of obturation sample, the left side, the right side, side plate is put in four sides below, loading system, displacement sensor and pressure sensor are connected outside side plate, it is made to organize integral and connects counterforce device.Pressure is generated at the top of obturation sample and side by loading system, is obtained using pressure sensor and displacement sensor and records corresponding pressure and displacement data.It is an advantage of the invention that stability of the unilateral big stage afterwards filling body of exposure under a variety of stress and different size conditions can be tested, the filling hydrodynamic properties under corresponding environment are measured by sensor, probe into obturation failure mechanism, with easy to operate, high degree of automation, safe, continuous, accurate, efficient advantage.

Description

A kind of big stage afterwards filling body unstable failure test device of unilateral exposure and method
Technical field
The present invention relates to a kind of big stage afterwards filling body unstable failure test device of unilateral side exposure and methods
Background technique
As resource exploitation and environmental protection contradiction are increasingly prominent, mine filling is as reduction mining activity to earth's surface Environment damages and ensures a kind of effective means of Stope safty, will can be by more and more extensive utilization.With the mankind couple The increasing of mineral resources increasingly demand, deep mining increasingly becomes mainstream, and the stability of obturation is that control stope loses Steady and surface subsidence principal element.In the big stage afterwards filling mining process in deep, carried out after mineral building exploitation cementing Mineral building obturation is exposed as pillar as unilateral side and carries out stooping pillaring by filling, and roof pressure is supported from original ore pillar to surrounding Obturation transfer, as support mineral building unilateral side exposure obturation maintain roof pressure play the role of it is critical, such as What ensures the coke that the unilateral big stage afterwards filling body of exposure keeps stability to have become current research during stooping pillaring Point.In practice, mine filling body top is by roof Stress, laterally by the frictional force for being in contact with it rock, when therewith for engineering When neighbouring ore pillar is exploited, then there is stress and concentrate now obturation in an exposed scope of freedom, roof Stress redistribution As in addition, the height of afterwards stope of big stage can reach 100 meters, and the obturation of unilateral side exposure is easy to appear damage unstability across collapsing Therefore accident it is extremely necessary to study damage feature and unstability whole process feature of the obturation under unilateral exposure.Based on above-mentioned Situation, there is an urgent need to one kind can simulate live obturation environmental effect, and can obtain obturation under unilateral exposure The test device and method of unstable failure mechanical characteristic carry out mechanical characteristic and instability Mechanism progress to obturation test specimen to reach Experimental study, the purpose of prophylactic filling body unstability accident.
Summary of the invention
The purpose that the present invention is implemented is to propose a kind of unilateral big stage afterwards filling body unstable failure test device of exposure And method, it can make full use of test specimen control system, the stress loading system, data collection system of described device, simulation is unilateral The big stage afterwards filling body environmental effect of exposure simultaneously can obtain unstable failure mechanical characteristic of the obturation under unilateral exposure, Accurately, experimental study quickly and easily is carried out to obturation test specimen stress characteristic, to reach the mesh of prophylactic filling body unstability accident 's.To achieve the goals above, the present invention adopts the following technical scheme: a kind of unilateral big stage afterwards filling body unstability of exposure is broken Bad test device and method, comprising:
Test specimen control system, 8 and of side plate of four top, the left side, the right side, back sides including obturation sample 12 Be fixed on axial reaction component 1, the axially self loading system 3 on lateral reaction steelframe 10, lateral auto-loading system 7 and by The experimental provision main body that pedestal 11, axial reaction component 1, screw rod 9, screw thread 13 form.
Stress loading system, including axially self loading system 3, lateral auto-loading system 7 and bearing bottom plate 5.
Data collection system, intelligence axial pressure sensor 2, intelligent side pressure sensor including acquisition pressure signal 6 and acquisition displacement signal intelligent displacement sensor 4.
Preferably, a kind of big stage afterwards filling body unstable failure test device of unilateral exposure and method, it is characterised in that: Force environment of the mine filling body under unilateral exposure is simulated, and test specimen control system and stress loading system can be passed through Accurately, different ambient stress retrofilling hydrodynamic properties conveniently, efficiently, are quickly measured, field measurement is not necessarily to, simulates indoors Test, have it is easy to operate, do not influence to produce, high degree of automation, safe, accurate, efficient advantage.
Preferably, cement tailings ratio, the pulp density, curing age one of the obturation sample 12 and mine filling body It causes, the ratio of width to height for the obturation sample that can be tested is respectively 1:1,1:2 and 1:3.
Preferably, the pedestal 11, axial reaction component 1 and lateral reaction steelframe 10 are rigid metal stainless steel Matter, compression strength are greater than 100MPa, and pedestal 11 and axial 1 corresponding position of reaction component are opened and 10 thickness phase of lateral reaction steelframe Together, with a thickness of 20-30mm, the concave groove of 8mm is set, to fix lateral reaction steelframe 10 inside pedestal 11.
Preferably, the axially self loading system 3 and lateral auto-loading system 7 belong to rigid material, by oil pressure It is flexible to control it, load deflection range is 40-60mm, and loading speed range is 0.01-1m/s.
Preferably, the intelligent axial force transducer 2 and intelligent side force snesor 6 are anti-corrosion stainless steel material, can It repeats to try out, range is 50g to 50t, precision 0.01%.
Preferably, the intelligent displacement sensor 4 is laser displacement sensor, can automatically save displacement data in due course, Minimum precision is 0.01mm, and the service life is up to 2,000,000 times or more.
Preferably, the side plate 8 be through special rigidity stainless steel sheet, 12 side of obturation sample rigidity not Become rusty steel plate, and outside is relatively smooth, and inside adds abrasive material, to simulate the frictional force of mine filling body and peripheral rock, increases and surveys The accuracy of examination.
Preferably, the screw rod 9 is the threaded rigid iron of special processing, cooperation hexagonal screw thread 13 it is fixed up and down every From plate, height adjustment can be carried out to axial reaction component 1, to test the obturation test specimen of different aspect ratios, it is different to reach simulation The stability of size stope filling body.
The invention proposes a kind of big stage afterwards filling body unstable failure test device of unilateral exposure and method, in application State system comprising following work step:
A, axial reaction component 1 and pedestal 11 are assembled into bracket loading test platform by lateral reaction steelframe 10, are matched with screw rod 9 Hexagonal screw thread 13 is closed to be fixed.
B, test obturation sample 12 used is placed on the bearing bottom plate 5 in experimental rig, is placed in its each face Corresponding side plate 8, using axially self loading system 3 and lateral auto-loading system 7 by side plate 8 to filling Body style 12 is pressurizeed, and when sample side reaches the displacement constraint of practical mine, top is stopped after reaching the roof pressure of practical mine Only pressurize.
C, the axial direction that obturation test specimen 12 receives is recorded using intelligent axial force transducer 2 and intelligent side force snesor 6 Pressure and lateral pressure record the axial displacement that obturation test specimen 12 generates during loading using intelligent displacement sensor 4 And lateral displacement.
Compared with the device of existing simulation mine filling body boundary condition, the present invention has the advantage that
A kind of big stage afterwards filling body unstable failure test device of unilateral side exposure and method that the present invention addresses, test specimen Control system, stress loading system, the mutual close fit between data collection system, simulation mine filling body is in unilateral side exposure In the case of force environment, and can it is accurate by test specimen control system and stress loading system, quickly and easily measure correspondence Environment retrofilling mechanics characteristic, is not necessarily to field measurement, simulation test indoors, has easy to operate, does not influence to produce, High degree of automation, safe and efficient advantage.Cement tailings ratio, the slurry of the obturation sample 12 used and mine filling body are dense Degree, curing age are consistent, but also the ratio of width to height of obturation specimen size can be set respectively for 1:1,1:2 and 1:3, respectively The frictional force of a side side plate 8 is consistent with the practical frictional force of mine, top pressure also coincide the practical roof pressure of mine, as far as possible Reach the reliable accurate of simulation, the system principle is simple, operates more convenient.
Detailed description of the invention
Fig. 1 is the Y-Z of apparatus of the present invention to sectional view
Fig. 2 is the Z-X of apparatus of the present invention to sectional view
In figure: 1- axial direction reaction component, the axial pressure sensor of 2- intelligence, 3- axially self loading system, 4- intelligence position Displacement sensor, 5- bearing bottom plate, 6- intelligent side pressure sensor, the side 7- is to auto-loading system, 8- side plate, 9- screw rod, 10- lateral reaction steelframe, 11- pedestal, 12- obturation sample, 13- screw thread.

Claims (9)

1. a kind of unilateral side exposes big stage afterwards filling body unstable failure test device and method, which is controlled by test specimen is System, stress loading system, data collection system composition.Experimental provision control system main body by pedestal 11, axial reaction component 1, Screw rod 9 and screw thread 13 form, and in the top of obturation sample 12, the left side, the right side, side plate 8 is put in four sides below, left Face, the right side and subsequent side plate 8 connect lateral auto-loading system 7, intelligent displacement sensor 4 and intelligent side pressure Sensor 6 makes it organize integral and is adjacent to lateral reaction steelframe 10.8 connecting shaft of side plate of 12 top of obturation style is automatic To loading system 3, intelligent displacement sensor 4 and intelligent axial force transducer 2, so that it is organized integral and be close to axial counter-force structure Part 1.Pressure is generated to 12 top of obturation sample and side by axially self loading system 3 and lateral auto-loading system 7, It is obtained by the axial pressure sensor 2 of intelligence and intelligent side pressure sensor 6 and records corresponding pressure data, pass through top And the intelligent displacement sensor 4 of side records corresponding displacement data.
2. a kind of unilateral side according to claim 1 exposes big stage afterwards filling body unstable failure test device and method, It is characterized by: the obturation sample 12 is consistent with the cement tailings ratio of mine filling body, pulp density, curing age, it can The ratio of width to height with the obturation sample of test is respectively 1:1,1:2 and 1:3.
3. a kind of unilateral side according to claim 1 exposes big stage afterwards filling body unstable failure test device and method, It is characterized by: the pedestal 11, axial reaction component 1 and lateral reaction steelframe 10 are rigid metal stainless steel material, Pedestal 11 and axial 1 corresponding position of reaction component open it is identical as 10 thickness of lateral reaction steelframe, with a thickness of 20-30mm, pedestal 11 The concave groove of inside setting 8mm, to fix lateral reaction steelframe 10.
4. a kind of unilateral side according to claim 1 exposes big stage afterwards filling body unstable failure test device and method, It is characterized by: the axially self loading system 3 and lateral auto-loading system 7 can pass through control speed and two kinds of pressure Method controls 12 top of obturation sample and lateral pressure, and by oil pressure cntrol, it stretches, and load deflection range is 40- 60mm, loading speed range are 0.01-1m/s.
5. a kind of unilateral side according to claim 1 exposes big stage afterwards filling body unstable failure test device and method, It is characterized by: the intelligent axial force transducer 2 and intelligent side force snesor 6 are anti-corrosion stainless steel material, repeat On probation, range is 50g to 50t, precision 0.01%.
6. a kind of unilateral side according to claim 1 exposes big stage afterwards filling body unstable failure test device and method, It is characterized by: the intelligent displacement sensor 4 is laser displacement sensor, displacement data can be automatically saved in due course, it is minimum Precision is 0.01mm, and the service life is up to 2,000,000 times or more.
7. a kind of unilateral side according to claim 1 exposes big stage afterwards filling body unstable failure test device and method, It is characterized by: the side plate 8 is the rigid plate through special rigidity stainless steel sheet, in 12 side of obturation sample, outside Side is relatively smooth, and the inside directly contacted with obturation is abrasive material, to simulate the friction of mine filling body and peripheral rock Power increases the accuracy of test.
8. a kind of unilateral side according to claim 1 exposes big stage afterwards filling body unstable failure test device and method, It is characterized by: the screw rod 9 is the threaded rigid iron of special processing, the fixed isolation up and down of cooperation hexagonal screw thread 13 Plate can carry out height adjustment to axial reaction component 1 when necessary and reach simulation to test the obturation test specimen of different aspect ratios The stability of different size stope filling bodies.
9. a kind of unilateral big stage afterwards filling body unstable failure test method of exposure, characteristic is, using such as claim 1 To 8 described in any item unilateral big stage afterwards filling body unstable failure test devices of exposure, include the following steps:
A, axial reaction component 1 and pedestal 11 are assembled into bracket loading test platform by lateral reaction steelframe 10, with the cooperation of screw rod 9 six Angle screw thread 13 is fixed.
B, test obturation sample 12 used is placed on the bearing bottom plate 5 in experimental rig, is placed therewith in its each face Corresponding side plate 8 gives obturation formula by side plate 8 using axially self loading system 3 and lateral auto-loading system 7 Sample 12 pressurizes, when sample side reaches the displacement constraint of practical mine, top stop after reaching the roof pressure of practical mine plus Pressure.
C, the axial compressive force that obturation test specimen 12 receives is recorded using intelligent axial force transducer 2 and intelligent side force snesor 6 And lateral pressure, the axial displacement and side that obturation test specimen 12 generates during loading are recorded using intelligent displacement sensor 4 To displacement.
CN201810748787.8A 2018-07-10 2018-07-10 A kind of big stage afterwards filling body unstable failure test device of unilateral exposure and method Pending CN109141518A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111398037A (en) * 2020-04-28 2020-07-10 河南理工大学 Testing device for testing strength of single free surface of rock and using method
CN112903462A (en) * 2021-02-04 2021-06-04 太原理工大学 Device and method for testing bearing capacity of single-row group column in horizontal goaf under double-shaft loading
CN113218759A (en) * 2021-05-08 2021-08-06 北京科技大学 Filling body double-shaft loading system reconstructed based on single-shaft testing machine and using method

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CN205786608U (en) * 2016-05-05 2016-12-07 安徽理工大学 Pressure-bearing tomography adopts activation and water inrush channel forming process similar test device

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Publication number Priority date Publication date Assignee Title
JP2009236802A (en) * 2008-03-28 2009-10-15 Railway Technical Res Inst Three-dimensional tunnel loading simulation device
CN102607946A (en) * 2012-02-28 2012-07-25 武汉大学 Device for large-scale true tri-axial test of original grading rockfill body and use method of method
CN103471914A (en) * 2013-09-18 2013-12-25 山东科技大学 Triaxial impact ground pressure true simulation test system
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CN205786608U (en) * 2016-05-05 2016-12-07 安徽理工大学 Pressure-bearing tomography adopts activation and water inrush channel forming process similar test device
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111398037A (en) * 2020-04-28 2020-07-10 河南理工大学 Testing device for testing strength of single free surface of rock and using method
CN112903462A (en) * 2021-02-04 2021-06-04 太原理工大学 Device and method for testing bearing capacity of single-row group column in horizontal goaf under double-shaft loading
CN113218759A (en) * 2021-05-08 2021-08-06 北京科技大学 Filling body double-shaft loading system reconstructed based on single-shaft testing machine and using method

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