CN106996735A - A kind of colliery uniaxial stress-strain experimental method in situ - Google Patents
A kind of colliery uniaxial stress-strain experimental method in situ Download PDFInfo
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- CN106996735A CN106996735A CN201710437936.4A CN201710437936A CN106996735A CN 106996735 A CN106996735 A CN 106996735A CN 201710437936 A CN201710437936 A CN 201710437936A CN 106996735 A CN106996735 A CN 106996735A
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- stress
- slotting
- experimental method
- colliery
- strain
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/30—Measuring arrangements characterised by the use of mechanical techniques for measuring the deformation in a solid, e.g. mechanical strain gauge
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
Abstract
The invention discloses a kind of colliery uniaxial stress-strain experimental method in situ, a diameter of 50mm, the Standard rock sample highly for 100mm are processed by coring on the spot, in tunnel, highwall excavates the slotting that length, width and height are respectively 500 × 500 × 300mm, and slotting up-and-down boundary center polish a diameter of 150mm flattened region to lay experimental method.Experimental method is followed successively by stress probe, cuboid pressure-bearing steel plate and the cylinder specimen of flat hydraulic jack, anchor cable stressometer from top to bottom, is placed in flattened region in the middle of slotting by four, and ensure that four are centrally located at same axis.Fix sample, connect stress probe and recording box, sample preliminary examination stress state is forced into jack, monitoring pressure in real time, with the deflection of amesdial and outside micrometer measurement test specimen axially with ring, so as to realize the experiment of the uniaxial compression under home path, the drawbacks of laboratory simulation research can not reflect colliery real environmental conditions is solved.
Description
Technical field
The present invention relates to a kind of experimental method in situ, more particularly to a kind of original for coal rock uniaxial stress-strain
Position experimental method.
Background technology
With the development of science and technology, colliery experimental facilities has also obtained sufficient development, and various experimental facilities layers go out not
Thoroughly, experiment condition is also greatly improved, and carries out various colliery experiments also relatively convenient.Carry out coal petrography uniaxial stress-strain
Experiment, can be very good to reflect the coal petrography attribute and its residing physical environment in colliery, to explore coal mining feature and safety
Exploitation provides data basis.The uniaxial tests of research safety of coal mines are that coal sample or rock sample are taken from colliery mostly at present, so
Post-processing carries out uniaxial stress-strain experiment indoors into standard specimen, and this process is in the presence of very big human factor and accidentally
Error, and transportation can have large effect to coal petrography property, experimental facilities also brings along certain error, it is impossible to well
Truly adopt the ess-strain change of lower rock in reflection colliery, it is therefore necessary to design one kind and can carry out colliery simple stress and answer
The experimental method in situ of change, preferably to provide data and theories integration for safety of coal mines exploitation.
The content of the invention
The problem of adopting coal and rock ess-strain feature can not be reflected very well to solve laboratory experiment, the present invention devises one
Colliery uniaxial stress-strain experimental method in situ, including sample are planted, highwall coal petrography slotting, drainage ditch, cylindrical rock mass sample is long
Cube pressure-bearing steel plate, stress probe, amesdial automatic checkout system, stress box, flat hydraulic jack.Pass through the experimental method
Obtain more truly reflecting the experimental data of field condition.
The standard specimen carries out coring processing at the scene, and the drill bit for being 50mm with internal diameter coal seam where test block is drilled through
Coal core, chooses total length and is more than 100mm, overall structure is good, homogeneous fine and close coal core be processed into size for φ 50mm ×
100mm cylindrical rock sample, is wrapped up coal sample with water resisting protection film.
The highwall coal petrography slotting is to dig the slotting that length, width and height are respectively 500 × 500 × 300mm in tunnel highwall,
The up-and-down boundary of slotting polish diameter in 150mm flattened region, and the drainage ditch that width is 5mm is set in slotting lower boundary.
Further, get out the cuboid bearing plate that length and width are 100mm, intrinsic safety type anchor cable stressometer, amesdial from
Dynamic detecting system and flat hydraulic jack.
Further, flattened region is respectively flat hydraulic jack, anchor cable stressometer stress from top to bottom in slotting
Probe, cuboid pressure-bearing steel plate and cylindrical sample, four are centrally located at same axis and perpendicular to slotting up-and-down boundary, always
It is highly 300mm or so.
Further, described anchor cable stressometer stress probe is connected with recording box.
Further, fixedly secured good amesdial and outside micrometer, amesdial axis and cylindrical rock sample axis
Parallel, amesdial upper end is generally aligned in the same plane with sample upper surface, and gauge head is contacted with cuboid pressure-bearing steel plate, by outside micrometer
Cylindrical rock sample is blocked, outside micrometer and cylindrical rock sample contact position are tangent, outside micrometer axis and cylinder
Shape rock sample axis perpendicular, connects and is counted automatically with amesdial automatic checkout system.
Further, described coal sample is pressurizeed with flat hydraulic jack, and upper surface connects with smooth coincide in slotting upper surface
Touch.Lower surface is contacted with smooth coincide of bearing plate.
A kind of described colliery uniaxial stress-strain experimental method in situ, the amesdial automatic checkout system measurement described in it
The axial strain and hoop strain (diameter change) of sample.Stress is popped one's head in and recording box monitors mining pressure change in real time.
Advantages of the present invention is with effect：
Cylindrical rock sample of the present invention reduces transportation and natural environment institute to sample and processing on the spot
The various influences brought, reduce the secondary destruction to coal sample in process, and experimental result is more true and reliable.
The inventive method is experimental method in situ, operation field can complete field, not only save human and material resources and wealth
Power, and the various errors that large-scale experiment equipment is brought are avoided, experimental period is short, rationally economical.
The inventive method is simple in construction, easy to operate, multigroup experiment can be carried out simultaneously, and can truly reflect work on the spot
Face front support pressure change, can accurate acquisition mining induced stress change and coal rock deformation situation, can be carried for Safety of Coal Mine Production
For accurate experimental data.Its compact conformation, cost is relatively low, and data are accurate, wide using scope, is applicable with extensive
Property.
The inventive method causes coal sample to be in the stress of primary rock, more conforms to the stress path during seam mining, more
The process of the rock failure mechanism of rock during seam mining, and real creep time and creep mechanism can be reflected.
Brief description of the drawings
Fig. 1 is the main structure diagram of the inventive method；
Fig. 2 is the overlooking the structure diagram of the inventive method.
In figure：1st, anchor cable stressometer stress is popped one's head in, and 2, cuboid pressure-bearing steel plate, 3, amesdial, 4, cylindrical rock sample,
5th, slotting, 6, outside micrometer, 7, highwall country rock, 8, water resisting protection film, 9, drainage ditch, 10, stress box, 11, flat oil pressure
Jack.
Embodiment
Illustrated embodiment elaborates to the present invention below in conjunction with the accompanying drawings.
As shown in figure 1, the present invention is the method for the experiment of colliery uniaxial stress-strain original position, mainly there is cylindrical rock mass
Sample 4, water resisting protection film 8, cuboid pressure-bearing steel plate 2, anchor cable stressometer stress probe 1, flat hydraulic jack 11, thousand points
Table 3 and outside micrometer 6 are constituted.Firstly the need of the slotting 5 that 500 × 500 × 300mm is excavated in coal mine roadway highwall,
Set wide in the up-and-down boundary center a diameter of 150mm of burnishing part of slotting or so flattened region, and in the lower boundary of slotting
The drainage ditch 9 for 5mm is spent, the water of lower boundary can be flowed to outside slotting through drainage ditch 9.The drill bit for being 50mm with internal diameter is in underground
1000m or so core-drillings, are subsequently processed into standard cylindrical rock sample 4, and water proof is used after simply polishing is carried out to sample 4
Protective film 8 wraps up sample 4.Prepare the complete cuboid pressure-bearing steel plate 2 that a length and width are 100mm, multiple functional peace
Complete reliable anchor cable stressometer (stress probe 1 and stress box 10), the intact flat hydraulic jack 11 of performance, precision can reach
To desired amesdial 3 and outside micrometer 6.
First by the lower boundary flattened region for being placed on slotting 5 of the smooth stabilization of flat hydraulic jack 11, then successively
Stress probe 1, cuboid pressure-bearing steel plate 2 and the cylindrical rock sample 4 with water resisting protection film 8 are placed on flat oil pressure
The upper surface of jack 11, cylindrical rock sample 4 is contacted with smooth coincide in the coboundary of slotting 5, and four positions are done slightly
Adjustment, it is ensured that four are fixed on the flattened region of slotting 5, and four are centrally located at same axis, axis and slotting up-and-down boundary
Flattened region is perpendicular.Amesdial 3 and outside micrometer 6 are fixed, the axis of amesdial 3 and the axis phase of cylindrical rock sample 4
Parallel, the one end of amesdial 3 is generally aligned in the same plane with the upper surface of cylindrical sample 4, gauge head one end and the upper table of cuboid pressure-bearing steel plate 2
Face is contacted, and amesdial 3 is used for the axial displacement for measuring cylindrical sample 4.Outside micrometer 6 is blocked into cylindrical rock sample 4,
Its axis and the axis perpendicular of cylindrical sample 4, and two contact positions are tangent, outside micrometer 6 is used to measure cylindrical sample 4
Circumferential deformation (diameter change), connect and counted automatically with amesdial automatic checkout system.By stress probe 1 and stress box 10
Connection, the primary stress level of sample is slowly forced into flat hydraulic jack 11, in real time institute in front of monitoring coal mine work area
The mining pressure transmitted, is averagely recorded once a day.
The inventive method can be adjusted according to different field conditions, and monitoring can be needed according to work place study
Not stress and strain change in the same time.
Claims (5)
1. a kind of colliery uniaxial stress-strain experimental method in situ, it is characterised in that：It is long including anchor cable stressometer stress probe 1
Cube pressure-bearing steel plate 2, amesdial 3, cylindrical rock sample 4, slotting 5, outside micrometer 6, highwall country rock 7, water resisting protection is thin
Film 8, drainage ditch 9, stress box 10, flat hydraulic jack 11.Slotting 5 is excavated in coal mine roadway highwall and formed, following in slotting 5
Boundary is provided with drainage ditch 9, and the up-and-down boundary of slotting 5 polishes flat region, and flat oil pressure is laid in flattened region successively from top to bottom
Jack 11, anchor cable stressometer stress probe 1, cuboid pressure-bearing steel plate 2 and cylindrical rock sample 4, anchor cable stressometer stress
Probe 1 is connected with stress box 10, for the mining pressure just transmitted in face of monitoring.The diameter side of cylindrical rock sample 4
There is outside micrometer 6 to card, axial direction is equipped with amesdial 3, and the hoop strain (diameter of cylindrical rock sample 4 is monitored respectively
Change) and axial strain.
2. a kind of colliery uniaxial stress-strain experimental method in situ according to claim 1, it is characterised in that cylindrical rock
In underground 1000m working sites, coring is processed stone sample 4 on the spot, is processed into after standard specimen and is surrounded by water resisting protection film 8.
3. a kind of colliery uniaxial stress-strain experimental method in situ according to claim 1, it is characterised in that flat oil pressure
The diameter of jack 11 is more than the diameter of anchor cable stressometer stress probe 1, and the diameter of anchor cable stressometer stress probe 1 is more than cuboid
The width of pressure-bearing steel plate 2, the width of cuboid pressure-bearing steel plate 2 is more than the diameter of cylindrical rock sample 4, and four are centrally located at
Same axis, it is stable in the up-and-down boundary flattened region of slotting 5 to lay.
4. a kind of colliery uniaxial stress-strain experimental method in situ according to claim 1, it is characterised in that thousand points of external diameter
Chi 6 blocks cylindrical rock sample 4, and the axis perpendicular of its axis and cylindrical rock sample 4, two contact surfaces are tangent, thousand points
The axis of table 3 is parallel with the axis of cylindrical rock sample 4.
5. a kind of colliery uniaxial stress-strain experimental method in situ according to claim 1, after experimental method installation,
The primary stress level of cylindrical rock sample 4 is forced into flat hydraulic jack 11, is then visited with anchor cable stressometer stress
First 1 monitors the mining pressure that front working face is transmitted with stress box 10, and cylindrical rock is measured with outside micrometer 6 and amesdial 3
The hoop strain (diameter change) and axial strain of stone sample 4.
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| CN201710437936.4A CN106996735A (en) | 2017-06-12 | 2017-06-12 | A kind of colliery uniaxial stress-strain experimental method in situ |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109459313A (en) * | 2018-12-29 | 2019-03-12 | 四川大学 | The mechanical behavior and seepage characteristic home position testing method and system of coal and rock under the influence of true mining induced stress |
| CN109506556A (en) * | 2018-09-20 | 2019-03-22 | 中国矿业大学(北京) | A kind of coal mine biaxial stress strains experimental provision in situ and method |
| CN109596505A (en) * | 2018-11-27 | 2019-04-09 | 西安近代化学研究所 | A kind of large scale pressed explosives column hydrothermal aging test sample basket |
| CN110595854A (en) * | 2019-09-20 | 2019-12-20 | 四川省水利科学研究院 | Large test piece pressure chamber for grooving rock mass and construction method |
| CN115584966A (en) * | 2022-10-28 | 2023-01-10 | 中国地质科学院地质力学研究所 | Method for obtaining three-dimensional ground stress by utilizing triaxial rock mechanics experiment |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201266192Y (en) * | 2008-10-08 | 2009-07-01 | 中国科学院武汉岩土力学研究所 | Stress, water stream, chemical coupling rock uniaxial compression creep instrument |
| CN103983490A (en) * | 2014-05-26 | 2014-08-13 | 中国科学院武汉岩土力学研究所 | Preparation method of disturbed belt sample for reflecting stress state of primary rock |
| CN204165806U (en) * | 2014-03-11 | 2015-02-18 | 江洎洧 | A kind of equipment of indoor recovery undisturbed soil |
| CN104849134A (en) * | 2015-05-26 | 2015-08-19 | 中国石油大学(华东) | Method for determining long-period strength of rock through multistage stress staged loading creep mechanic test |
| CN105021446A (en) * | 2015-07-16 | 2015-11-04 | 大连理工大学 | Combined dynamic triaxial dynamic simple shear pressure chamber system capable of measuring radial strain of soil sample |
| CN106018123A (en) * | 2016-05-13 | 2016-10-12 | 北京科技大学 | Anchoring-type rock-soil-mass in-situ direct-shearing test device |
| CN106441210A (en) * | 2016-11-18 | 2017-02-22 | 中国科学院武汉岩土力学研究所 | Device for measuring circumferential strain of rock specimen |
| CN106645627A (en) * | 2016-09-21 | 2017-05-10 | 中国矿业大学(北京) | Strain measurement method for water-absorption free expansion of coal rocks |
-
2017
- 2017-06-12 CN CN201710437936.4A patent/CN106996735A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201266192Y (en) * | 2008-10-08 | 2009-07-01 | 中国科学院武汉岩土力学研究所 | Stress, water stream, chemical coupling rock uniaxial compression creep instrument |
| CN204165806U (en) * | 2014-03-11 | 2015-02-18 | 江洎洧 | A kind of equipment of indoor recovery undisturbed soil |
| CN103983490A (en) * | 2014-05-26 | 2014-08-13 | 中国科学院武汉岩土力学研究所 | Preparation method of disturbed belt sample for reflecting stress state of primary rock |
| CN104849134A (en) * | 2015-05-26 | 2015-08-19 | 中国石油大学(华东) | Method for determining long-period strength of rock through multistage stress staged loading creep mechanic test |
| CN105021446A (en) * | 2015-07-16 | 2015-11-04 | 大连理工大学 | Combined dynamic triaxial dynamic simple shear pressure chamber system capable of measuring radial strain of soil sample |
| CN106018123A (en) * | 2016-05-13 | 2016-10-12 | 北京科技大学 | Anchoring-type rock-soil-mass in-situ direct-shearing test device |
| CN106645627A (en) * | 2016-09-21 | 2017-05-10 | 中国矿业大学(北京) | Strain measurement method for water-absorption free expansion of coal rocks |
| CN106441210A (en) * | 2016-11-18 | 2017-02-22 | 中国科学院武汉岩土力学研究所 | Device for measuring circumferential strain of rock specimen |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109506556A (en) * | 2018-09-20 | 2019-03-22 | 中国矿业大学(北京) | A kind of coal mine biaxial stress strains experimental provision in situ and method |
| CN109596505A (en) * | 2018-11-27 | 2019-04-09 | 西安近代化学研究所 | A kind of large scale pressed explosives column hydrothermal aging test sample basket |
| CN109596505B (en) * | 2018-11-27 | 2021-07-27 | 西安近代化学研究所 | Sample basket for large-size press-fitting explosive column wet-heat aging test |
| CN109459313A (en) * | 2018-12-29 | 2019-03-12 | 四川大学 | The mechanical behavior and seepage characteristic home position testing method and system of coal and rock under the influence of true mining induced stress |
| CN109459313B (en) * | 2018-12-29 | 2023-09-01 | 四川大学 | In-situ test method and system for mechanical behavior and seepage characteristics of coal rock mass |
| CN110595854A (en) * | 2019-09-20 | 2019-12-20 | 四川省水利科学研究院 | Large test piece pressure chamber for grooving rock mass and construction method |
| CN115584966A (en) * | 2022-10-28 | 2023-01-10 | 中国地质科学院地质力学研究所 | Method for obtaining three-dimensional ground stress by utilizing triaxial rock mechanics experiment |
| CN115584966B (en) * | 2022-10-28 | 2023-08-01 | 中国地质科学院地质力学研究所 | Method for obtaining three-dimensional ground stress by using triaxial rock mechanical experiment |
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Application publication date: 20170801 |