CN205656044U - A test piece for shock wave anatonosis coal seam simulation experiment - Google Patents
A test piece for shock wave anatonosis coal seam simulation experiment Download PDFInfo
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- CN205656044U CN205656044U CN201620477073.4U CN201620477073U CN205656044U CN 205656044 U CN205656044 U CN 205656044U CN 201620477073 U CN201620477073 U CN 201620477073U CN 205656044 U CN205656044 U CN 205656044U
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- coal
- coal sample
- shell
- anatonosis
- sample block
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Abstract
The utility model discloses an it specifically is a test piece for shock wave anatonosis coal seam simulation experiment to be used for physical simulation experimental facilities technical field. The problem of establish undulant parameter through physical simulation experiment and send the quantification of splitting between effect, the permeability variation characteristic with the coal petrography and concern is solved, including shell, meet an emergency brick and coal sample piece foil gage, the shell be the rectangle shelly body that does not have the end, the inboard intermediate position that removes other five faces of bottom of shell is fixed with the brick of meeting an emergency, the shell internal fixation has the coal sample piece, the intermediate position that the coal sample piece removed other five faces of bottom is fixed with two orthogonal coal sample piece foil gages of placing, two lump coal appearance piece foil gages are fixed respectively at vertical direction and horizontal direction, the brick of meeting an emergency is pressed at two lump coal appearance piece foil gages on the surface. The utility model discloses the test piece yardstick of preparation is big, record deformation characteristic and statistics crack developmental state in the experimentation of being convenient for, and coal sample piece outward appearance cement mortar plays the effect of simulation country rock.
Description
Technical field
This utility model is for physical simulation experiment equipment technical field, a kind of test specimen for shock wave anatonosis coal seam simulation experiment.
Background technology
China has abundant coal bed gas resource, development and utilization coal bed gas to have long-range prospect.But China's coal field geology condition is more complicated, coal seam reservoirs has the feature of " three low is high " more: it is low that reservoir pressure is low, reservoir permeability is low, conventional hydraulic pressure break makes seam proportion, and the absorbability of coal seam reservoirs is high.Therefore, the major technology bottleneck of restriction cbm development is the permeability how improving coal seam, the anti-reflection and de-plugging anatonosis including fracturing.
Traditional coal seam gas yield-increasing technology many employings pressure break, slot and displacement etc., these measures achieve certain effect for specific region, but are restricted by factors such as natural conditions, are difficult to popularization and application.
High pulse power technology is one of support subject of contemporary new and high technology, it stores energy in the way of slow, then realize pulse compression, power amplification by being switched fast of various switches, use the shortest time, the highest intensity with individual pulse or controlled repetition pulse form, give load by high-power electromagnetic energy abrupt release.High-power electromagnetic energy is converted to required form of energy with different physical principles by various high power load, forms extreme physical environment in controlled region, it is achieved general lower irrealizable function of power.High pulse power technology anatonosis coal seam reservoirs is the shock wave coal seam reservoirs that will produce, and reaches the purpose of anatonosis.At present, this technology also lacks coal petrography fracturing effect, quantitative relationship between permeability variation feature and fluctuation parameters.
The quantitative relationship between fluctuation parameters and coal petrography fracturing effect, permeability variation feature can be set up by physical simulation experiment, but want to realize shock wave anti-reflection coal seam physical simulation experiment, it is first necessary to the problem solved is: make some scale, embody actual coal petrography characteristic as far as possible, prevent test specimen quick crashing, it is simple to the experiment test specimen of experimental data statistics.
Summary of the invention
This utility model is for the problem solving to set up quantitative relationship between fluctuation parameters and coal petrography fracturing effect, permeability variation feature by physical simulation experiment, it is provided that a kind of test specimen for shock wave anatonosis coal seam simulation experiment.
This utility model takes techniques below scheme: a kind of test specimen for shock wave anatonosis coal seam simulation experiment, including shell, strain brick and coal sample block foil gauge, described shell is bottomless rectangle shelly body, the centre position in other five faces removing bottom inside shell is fixed with strain brick, coal sample block it is fixed with in shell, coal sample block is fixed with two pieces of orthogonal placement coal sample block foil gauges except the centre position in other five faces of bottom, two lump coal sample block foil gauges are separately fixed at vertically and horizontally, and strain brick is pressed on two lump coal sample block foil gauge surfaces.
Described shell is to pour with cement mortar to form.
The square brick body of 1cm × 5cm × 5cm that described strain brick is made up of cement mortar.
Described coal sample block foil gauge is PVDF resistance strain gage.
Compared with prior art, the test specimen yardstick that this utility model makes is big, it is simple to recording deformation characteristic and statistics cranny development situation in experimentation, coal sample block appearance cement mortar plays the effect of simulation country rock；From the point of view of material similarity angle, use the anatonosis model experiment of cement mortar modeling coal seam country rock；Test specimen manufacturing process is convenient, with low cost.
Accompanying drawing explanation
Fig. 1 is this utility model structural representation；
1-coal sample block in figure, 2-shell, 3-strains brick, 4-coal sample block foil gauge.
Detailed description of the invention
As shown in Figure 1, a kind of test specimen for shock wave anatonosis coal seam simulation experiment, including shell 2, strain brick 3 and coal sample block foil gauge 4, described shell 2 is bottomless rectangle shelly body, it is fixed with strain brick 3 except the centre position in other five faces of bottom inside shell 2, coal sample block 1 it is fixed with in shell 2, coal sample block 1 is fixed with two pieces of orthogonal placement coal sample block foil gauges 4 except the centre position in other five faces of bottom, two lump coal sample block foil gauges 4 are separately fixed at vertically and horizontally, and strain brick 3 is pressed on two lump coal sample block foil gauge 4 surfaces.
Described shell 2 is to pour with cement mortar to form.
The square brick body of 1cm × 5cm × 5cm that described strain brick 3 is made up of cement mortar.
Described coal sample block foil gauge 4 is PVDF resistance strain gage.
Specific experiment step is as follows:
1. the square that coarse coal sample cuts into 15cm × 15cm × 15cm is block；After well cutting, implement further polish and polish in each surface to square coal cinder, and clears up each surface, removes the coal dust on surface, in order to next step pastes foil gauge；And all surfaces of coal sample block is carried out labeling labelling (labelling number is 1,2,3,4,5,6), it is simple to comparison in follow-up experiment；
2. the surface of pair square coal sample block carry out foil gauge stickup.The face of labelled " 6 " is reserved sightingpiston, 2 foil gauges are pasted in each comfortable center, remaining 5 face, the position of 2 foil gauges is orthogonal, in order to tests the deformation behaviour in horizontal and vertical direction, and ensures that the traction wire (cable) of foil gauge controls at about 2 meters.(the stickup foil gauge quantity on the most each coal cinder sample is 10, and traction wire is 20, and each wire is carried out labelling.)
3. in experimentation, for ensureing that coal cinder will not quickly be shattered, and simulate coal seam and be hit under confined pressure effect the impact of ripple, at surrounding and end face (i.e. label is 1,2,3,4,5 faces) sticky one layer of certain thickness cement of coal sample block, the one side (i.e. label is 6 faces) of coal sample block is stayed to produce rule as eye slit.Concrete is made as: first, make the square hard paper mould of length of side 25cm, mould has 4, without end face and bottom surface, the coal cinder pasting foil gauge is put into the position, middle of mould, papery mould so just leaves the space of 5cm width, the cement mortar of the different ratio mixed is poured in the surrounding space and end face space of mould, the periphery sides of coal sample defines the cement mortar of 5cm thickness, note pulling out the foil gauge wire correspondence on each coal sample surface during grouting, surrounding cement mortar and end face cement mortar in put into strain brick, draw the wire of strain brick simultaneously.Finally whole test specimen is placed maintenance 30 days, until cement mortar is fully cured.
4., after test specimen processes, shock-wave experiment can be carried out.
Claims (4)
1. the test specimen for shock wave anatonosis coal seam simulation experiment, it is characterized in that: include shell (2), strain brick (3) and coal sample block foil gauge (4), described shell (2) is bottomless rectangle shelly body, shell (2) inner side is fixed with strain brick (3) except the centre position in other five faces of bottom, coal sample block (1) it is fixed with in shell (2), coal sample block (1) is fixed with two pieces of orthogonal placements coal sample block foil gauge (4) except the centre position in other five faces of bottom, two lump coal sample block foil gauge (4) are separately fixed at vertically and horizontally, strain brick (3) is pressed on two lump coal sample block foil gauge (4) surfaces.
Test specimen for shock wave anatonosis coal seam simulation experiment the most according to claim 1, it is characterised in that: described shell (2) is to pour with cement mortar to form.
Test specimen for shock wave anatonosis coal seam simulation experiment the most according to claim 1 and 2, it is characterised in that: the square brick body of 1cm × 5cm × 5cm that described strain brick (3) is made up of cement mortar.
Test specimen for shock wave anatonosis coal seam simulation experiment the most according to claim 3, it is characterised in that: described coal sample block foil gauge (4) is PVDF resistance strain gage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620477073.4U CN205656044U (en) | 2016-05-24 | 2016-05-24 | A test piece for shock wave anatonosis coal seam simulation experiment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620477073.4U CN205656044U (en) | 2016-05-24 | 2016-05-24 | A test piece for shock wave anatonosis coal seam simulation experiment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205656044U true CN205656044U (en) | 2016-10-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620477073.4U Expired - Fee Related CN205656044U (en) | 2016-05-24 | 2016-05-24 | A test piece for shock wave anatonosis coal seam simulation experiment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205656044U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106053169A (en) * | 2016-05-24 | 2016-10-26 | 山西大同大学 | Test piece of coal seam simulation experiment using shock waves to increase permeability and experiment method based on test piece |
| CN111879606A (en) * | 2020-09-15 | 2020-11-03 | 中南大学 | Large-size shale sample true triaxial loading hydraulic fracturing strain measurement device |
-
2016
- 2016-05-24 CN CN201620477073.4U patent/CN205656044U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106053169A (en) * | 2016-05-24 | 2016-10-26 | 山西大同大学 | Test piece of coal seam simulation experiment using shock waves to increase permeability and experiment method based on test piece |
| CN111879606A (en) * | 2020-09-15 | 2020-11-03 | 中南大学 | Large-size shale sample true triaxial loading hydraulic fracturing strain measurement device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161019 Termination date: 20170524 |