CN205374168U - Long -term load test monitoring devices of jumbo size cuboid coal petrography sample - Google Patents
Long -term load test monitoring devices of jumbo size cuboid coal petrography sample Download PDFInfo
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- CN205374168U CN205374168U CN201520936680.8U CN201520936680U CN205374168U CN 205374168 U CN205374168 U CN 205374168U CN 201520936680 U CN201520936680 U CN 201520936680U CN 205374168 U CN205374168 U CN 205374168U
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- coal petrography
- stress sensor
- sensor localization
- petrography sample
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Abstract
The utility model discloses a long -term load test monitoring devices of jumbo size cuboid coal petrography sample relates to the rock mechanics testing technique field, includes top board, bottom plate, side limit restrain board and answers force transducer locating plate, the end to answer force transducer locating plate, side on, to answer force transducer locating plate and displacement sensor location board. The utility model designs a be used for the awaiting measuring monitoring of coal petrography sample of the space that roughly is hexahedron shape formed by top board, bottom plate, side limit restrain board top board, bottom plate, side limit restrain board medial surface set up respectively and answer force transducer, and the both sides plane symmetry sets up displacement sensor around whole device, and the variation of stresses of the difference that bears the weight of down each non - scope of freedom of jumbo size cuboid coal petrography sample for a long time and the lateral deformation circumstances of each scope of freedom difference are measured to the accuracy, and then the assay jumbo size cuboid coal petrography sample mechanics character sum destruction form of bearing the weight of the in -process for a long time, have extensive practicality.
Description
Technical field
This utility model relates to rock mechanics experiment technical field, specifically a kind of large scale cuboid coal petrography sample long-time bearing test monitoring device.
Background technology
Striping noise is as a kind of conventional coal-mining method; the only part coal in extraction coal seam; the coal set is stayed then to support overlying rock with the form of strip coal pillar, it is possible to effective suppression Overlying Strata In A Face depression and surface movement, thus the ecological environment of protecting field face and the facility such as building, railway.Ensureing that strip bearing block long term stability is conducive to safety in production and the economic development of mine, the mechanical property under research strip bearing block long term carrying seems very necessary with instability Mechanism.Adopt large scale cuboid coal petrography sample simulation strip coal pillar, carry out long-time bearing test, and monitor mechanical characteristics and the damage-form of coal petrography sample, be one of important method of research strip coal pillar instability Mechanism.
For the strip coal pillar under simulation mine similar as far as possible, coal petrography sample needs to apply lateral spacing constraint on relative two sides in long-time bearing process, monitoring has the transversely deforming of large scale cuboid coal petrography sample each scope of freedom difference in whole long-time bearing process of lateral spacing constraint and the STRESS VARIATION of each non-free difference, and the bearing capacity of each non-free difference, stress intensity and situation of change thereof after monitoring large scale cuboid coal rock specimen local failure but before entirety not yet unstability, and the deformation behaviour of each scope of freedom difference.
Along with people's further investigation to strip coal pillar stability, the requirement of Monitoring Data amount and monitoring accuracy in this test is more and more higher, also just monitoring method and equipment to the test of large scale cuboid coal petrography long-time bearing is had higher requirement.But, there is no practicable monitoring technology at present and complete this test with perfect monitoring system supplymentary.
Summary of the invention
For solving the technical problem of above-mentioned existence, this utility model provides a kind of large scale cuboid coal petrography sample long-time bearing test monitoring device, achieve the monitoring of the STRESS VARIATION situation of the transversely deforming to coal rock specimen to be measured each scope of freedom difference and each non-free difference, simple in construction, volume is little, easy disassembling, easy and simple to handle.
For reaching above-mentioned purpose, this utility model be the technical scheme is that
nullA kind of large scale cuboid coal petrography sample long-time bearing test monitoring device，Include top board、Base plate、Lateral spacing restraining plate、Upper stress sensor localization plate、Bottom stress sensor localization plate、Lateral stress sensor localization plate and displacement transducer location-plate，Described top board is arranged at the surface of base plate，Described lateral spacing restraining plate is two pieces，It is arranged on base plate the left and right sides，And fixed by fixing bolt，The lower surface of described top board、The medial surface of two pieces of lateral spacing restraining plates、The upper surface of base plate is in close contact respectively and is provided with upper stress sensor localization plate、Lateral stress sensor localization plate and bottom stress sensor localization plate，Described upper stress sensor localization plate、The rectangular parallelepiped space of front-back hollow out is formed between two blocks of lateral stress sensor localization plates and the end face of bottom stress sensor localization plate，On the front and back sides of described rectangular parallelepiped space, symmetrical fixing connection organizes displacement transducer location-plate more，Coal petrography sample to be measured is positioned in the rectangular parallelepiped space formed，The sensor installing correspondence in each sensor localization plate can be monitored.
The both sides of described fixing bolt are provided with adjusting nut.
Described upper stress sensor localization plate, bottom stress sensor localization plate, lateral stress sensor localization plate are provided with strain gauge locating slot, the opening direction of described strain gauge locating slot, all towards coal petrography sample to be measured, arranges wire lead slot by each described strain gauge locating slot.
Institute's displacement sensors location-plate is set to L-type, is connected by hold-down bolt and base plate are fixing.
This utility model devises by top board, base plate, what lateral spacing restraining plate formed is substantially the space monitoring for coal petrography sample to be measured of hexahedral shape, at described top board, base plate, lateral spacing restraining plate medial surface is respectively provided with strain gauge, it is symmetrical arranged displacement transducer in the two sides, front and back of whole device, accurately measure the STRESS VARIATION of the difference of each non-free of large scale cuboid coal petrography sample under long-time bearing and the transversely deforming situation of each scope of freedom difference, and then analyze the mechanical characteristics in large scale cuboid coal petrography sample long-time bearing process and damage-form, probe into strip coal pillar instability Mechanism, test effect is good, simple in construction, easy accessibility, duty is little, cost is low, there is wide applicability.
Accompanying drawing explanation
Fig. 1 is the front view that this utility model is overall；
Fig. 2 is that this utility model is dismantled the right pseudosection of lateral spacing restraining plate；
Fig. 3 is that this utility model is dismantled the top plan view of top board and base plate；
Fig. 4 is the right view of this utility model lateral spacing restraining plate；
Fig. 5 is the top view of this utility model top board and base plate；
Fig. 6 is the structural representation of this utility model " L " morpheme displacement sensor location-plate.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, this utility model is described in detail:
nullAs shown in Figure 1，This large scale cuboid coal petrography sample long-time bearing test monitoring device，Include top board 1、Base plate 2、Lateral spacing restraining plate 3、Upper stress sensor localization plate 4、Bottom stress sensor localization plate 5、Lateral stress sensor localization plate 6 and displacement transducer location-plate 8，Described top board 1 is arranged at the surface of base plate 2，Described lateral spacing restraining plate 3 is two pieces，It is arranged at the left and right sides on base plate 2，And fixed by fixing bolt 11，The lower surface of described top board 2、The medial surface of two pieces of lateral spacing restraining plates 3、The upper surface of base plate 2 is respectively arranged with upper stress sensor localization plate 4、Lateral stress sensor localization plate 6 and bottom stress sensor localization plate 5，It is in close contact between them but fixing connection，Described upper stress sensor localization plate 4、The rectangular parallelepiped space of front-back hollow out is formed between two blocks of lateral stress sensor localization plates 6 and the end face of bottom stress sensor localization plate 5，On the front and back sides of described rectangular parallelepiped space, symmetrical fixing connection organizes displacement transducer location-plate 8 more，Coal petrography sample 7 to be measured is positioned in the rectangular parallelepiped space formed，The sensor installing correspondence in each sensor localization plate can be monitored.
As preferred mode, in the present embodiment, the both sides of described fixing bolt 11 are provided with adjusting nut 12.By, after the long fixing connection of fixing bolt 11, standing on the upper surface of base plate 2, the horizontal range between two pieces of lateral spacing restraining plates 3 can be adjusted by adjusting nut 12 between two pieces of lateral spacing restraining plates 3.
In the present embodiment, the inner side being close to lateral spacing restraining plate 3 is provided with lateral stress sensor localization plate 6, and lateral spacing restraining plate 3 is connected with lateral stress sensor localization plate 6 and fixes through lateral spacing restraining plate 3 with the dowel hole 16 on lateral stress sensor localization plate 6 by shop bolt 13.
As preferred mode, in the present embodiment, described upper stress sensor localization plate 4, bottom stress sensor localization plate 5, lateral stress sensor localization plate 6 are provided with the strain gauge locating slot 15 of some circles, the opening direction of described strain gauge locating slot 15 is all towards coal petrography sample 7 to be measured, and each described strain gauge locating slot 15 is other arranges wire lead slot 14.
As preferred mode, in the present embodiment, institute's displacement sensors location-plate 8 is set to L-type, is connected by hold-down bolt 10 is fixing with base plate 2.Displacement transducer location-plate 8 is provided with the hole 9, displacement transducer location of some circles, is used for laying displacement transducer.
The coal petrography sample 7 to be measured of large scale cuboid is placed horizontally at the surface of bottom stress sensor localization plate 5, regulate clamp nut 12, lateral spacing restraining plate 3 promotes lateral stress sensor localization plate 6 to move together, being fixedly clamped by coal petrography sample 7 to be measured by lateral stress sensor localization plate 6, upper stress sensor localization plate 4 is horizontally placed at directly over coal petrography sample 7.
Use this utility model carries out the type testing step of size coal rock sample long-time bearing test:
(1) by hold-down bolt 10, all of " L " morpheme displacement sensor location-plate 8 is all fixed on a base plate 2, base plate 2 is placed horizontally at directly over the base of pressure testing machine, it is desirable to two ranking displacement sensor location-plates 8 are each rows in front and back.Bottom stress sensor localization plate 5 is lain in a horizontal plane in directly over base plate 2, flat strain gauge is filled in the strain gauge locating slot 15 of bottom stress sensor localization plate 5, the lead-in wire of sensor is drawn by wire lead slot 14, connects stress-strain test and analyzes system；And coal petrography sample 7 to be measured is lain in a horizontal plane in directly over bottom stress sensor localization plate 5, it is desirable to strain gauge locating slot 15 is towards sample to be tested 7.
(2) two pieces, left and right lateral spacing restraining plate 3 is connected with adjusting nut 12 by fixing bolt 11, two lateral spacing restraining plates 3 after connection stand on the upper surface of base plate 2, it is close to the inner side installation side strain gauge location-plate 6 of lateral spacing restraining plate 3, through dowel hole 16 by shop bolt 13 lateral spacing restraining plate 3 is connected with lateral stress sensor localization plate 6 and fixes；Being filled into by flat strain gauge in the strain gauge locating slot 15 of lateral stress sensor localization plate 6, the lead-in wire of sensor is drawn by wire lead slot 14, connects stress-strain test and analyzes system, it is desirable to strain gauge locating slot 15 is towards coal petrography sample 7 to be measured；Then adjusting adjusting nut 12, lateral spacing restraining plate 3 promotes lateral stress sensor localization plate 6 to move together so that coal petrography sample 7 is fixedly clamped by lateral stress sensor localization plate 6.
(3) being filled into by flat strain gauge in the strain gauge locating slot 15 of upper stress sensor localization plate 4, the lead-in wire of sensor is drawn by wire lead slot 14 again, connects stress-strain test and analyzes system；Then upper stress sensor localization plate 4 is inverted in directly over sample to be tested 7 so that strain gauge locating slot 15 is towards coal petrography sample 7 to be measured；Being placed horizontally at by top board 1 directly over upper stress sensor localization plate 4, move down the seaming chuck of pressure testing machine, contact top board 1 also applies certain prestressing force.
(4) displacement transducer is fixed through hole 9, displacement transducer location, it is desirable to displacement sensor probe is close to the side surface of coal petrography sample 7 to be measured, and the lead-in wire of displacement transducer is all connected with Displacement Monitoring Analysis system.
(5) test is started, according to test requirements document Monitoring Data and derive.
(6) off-test, the seaming chuck of upper shifting pressure testing machine, from top to down detaching equipment clean parts one by one.
Certainly; described above is not to restriction of the present utility model; this utility model is also not limited to the example above, the change made in essential scope of the present utility model of those skilled in the art, remodeling, interpolation or replacement, also should belong to protection domain of the present utility model.
Claims (4)
- null1. a large scale cuboid coal petrography sample long-time bearing test monitoring device，It is characterized in that，Include top board (1)、Base plate (2)、Lateral spacing restraining plate (3)、Upper stress sensor localization plate (4)、Bottom stress sensor localization plate (5)、Lateral stress sensor localization plate (6) and displacement transducer location-plate (8)，Described top board (1) is arranged at the surface of base plate (2)，Described lateral spacing restraining plate (3) is two pieces，It is arranged at the upper left and right sides of base plate (2)，And fixed by fixing bolt (11)，The lower surface of described top board (1)、The medial surface of two pieces of lateral spacing restraining plates (3)、The upper surface of base plate (2) is in close contact respectively and is provided with upper stress sensor localization plate (4)、Lateral stress sensor localization plate (6) and bottom stress sensor localization plate (5)，Described upper stress sensor localization plate (4)、The rectangular parallelepiped space of front-back hollow out is formed between two pieces of lateral stresses sensor localization plate (6) and the end face of bottom stress sensor localization plate (5)，On the front and back sides of described rectangular parallelepiped space, symmetrical fixing connection organizes displacement transducer location-plate (8) more，Coal petrography sample (7) to be measured is positioned in the rectangular parallelepiped space formed，The sensor installing correspondence in each sensor localization plate can be monitored.
- 2. a kind of large scale cuboid coal petrography sample long-time bearing test monitoring device according to claim 1, it is characterised in that the both sides of described fixing bolt (11) are provided with adjusting nut (12).
- 3. a kind of large scale cuboid coal petrography sample long-time bearing test monitoring device according to claim 1, it is characterized in that, described upper stress sensor localization plate (4), bottom stress sensor localization plate (5), lateral stress sensor localization plate (6) are provided with strain gauge locating slot (15), the opening direction of described strain gauge locating slot (15) is all towards coal petrography sample (7) to be measured, and each described strain gauge locating slot (15) is other arranges wire lead slot (14).
- 4. a kind of large scale cuboid coal petrography sample long-time bearing test monitoring device according to claim 1, it is characterised in that institute's displacement sensors location-plate (8) is set to L-type, is connected by hold-down bolt (10) and base plate (2) are fixing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520936680.8U CN205374168U (en) | 2015-11-23 | 2015-11-23 | Long -term load test monitoring devices of jumbo size cuboid coal petrography sample |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520936680.8U CN205374168U (en) | 2015-11-23 | 2015-11-23 | Long -term load test monitoring devices of jumbo size cuboid coal petrography sample |
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| CN205374168U true CN205374168U (en) | 2016-07-06 |
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| CN201520936680.8U Withdrawn - After Issue CN205374168U (en) | 2015-11-23 | 2015-11-23 | Long -term load test monitoring devices of jumbo size cuboid coal petrography sample |
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| CN (1) | CN205374168U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105277441A (en) * | 2015-11-23 | 2016-01-27 | 山东科技大学 | Long-term bearing test monitoring device for large-size cuboid coal and rock sample |
| CN106370153A (en) * | 2016-08-30 | 2017-02-01 | 北京理工大学 | Device and method for measurement of contact deformation and contact stress between metal parts |
| CN110501234A (en) * | 2019-09-18 | 2019-11-26 | 临沂大学 | A kind of the fractured rock bearing strain experimental provision and method of measurable lateral stress |
-
2015
- 2015-11-23 CN CN201520936680.8U patent/CN205374168U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105277441A (en) * | 2015-11-23 | 2016-01-27 | 山东科技大学 | Long-term bearing test monitoring device for large-size cuboid coal and rock sample |
| CN105277441B (en) * | 2015-11-23 | 2018-06-26 | 山东科技大学 | A kind of large scale cuboid coal petrography sample long-time bearing test monitoring device |
| CN106370153A (en) * | 2016-08-30 | 2017-02-01 | 北京理工大学 | Device and method for measurement of contact deformation and contact stress between metal parts |
| CN106370153B (en) * | 2016-08-30 | 2018-11-13 | 北京理工大学 | Contact deformation and contact stress measurements apparatus and method between a kind of metal parts |
| CN110501234A (en) * | 2019-09-18 | 2019-11-26 | 临沂大学 | A kind of the fractured rock bearing strain experimental provision and method of measurable lateral stress |
| CN110501234B (en) * | 2019-09-18 | 2023-06-02 | 临沂大学 | Broken rock bearing deformation experimental device and method capable of measuring side pressure stress |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160706 Effective date of abandoning: 20180626 |