CN106226341B - A kind of temperature loading system for simulating underground engineering ground temperature - Google Patents
A kind of temperature loading system for simulating underground engineering ground temperature Download PDFInfo
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- CN106226341B CN106226341B CN201610505648.3A CN201610505648A CN106226341B CN 106226341 B CN106226341 B CN 106226341B CN 201610505648 A CN201610505648 A CN 201610505648A CN 106226341 B CN106226341 B CN 106226341B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
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Abstract
The present invention provides a kind of temperature loading system for simulating underground engineering ground temperature, is heated for large scale rock sample physical model and realizes temperature field simulation.Including thermocouple (1), temperature controller (2), A.C. contactor (3) and at least 4 heating rods (4).Thermocouple (1) and heating rod (4) are embedded in rock sample physical model.Heating rod (4) arrangement surrounds at least 1 circle square, and the centroid of each circle square is overlapped with the central point of rock sample physical model.Thermocouple (1) is embedded on the midpoint on the 1st any side of circle square that heating rod (4) arrangement from inside to outside surrounds.The temperature for the rock sample physical model that temperature controller (2) is detected by comparison predetermined temperature and thermocouple (1), it controls A.C. contactor (3) to connect or trip, heating rod (4) is caused to heat to rock sample physical model or stop heating.
Description
Technical field
The present invention relates to underground engineering rock temperature simulation fields, and in particular to a kind of temperature for simulating underground engineering ground temperature
Loading system.
Background technique
21 century is the century that human development utilizes the underground space, in current, the mankind economic, that science and technology is fast-developing
Demand to resource, living space development and utilization rapidly increases, at present in world wide it is many it is built, building and will create
Underground engineering, the subterranean tunnel including traffic engineering construction, the underground passage based on exploitation of mineral resources and water conservancy and hydropower are opened
The underground chamber etc. of hair, all gradually develops to the direction of great burying.By taking mining activity as an example, originally mining is all in several hundred rice
Within depth, but in recent years, a large amount of mines 1000 meters of depth below that go underground are exploited, some mines in South Africa even into
4000 meters of mining depth is entered.
There is scholar's research to show that the not disturbed primitive rock temperature in underground rises with the increase of buried depth, geothermic gradient is with every
100 meters of 3 degrees Celsius of increases.When the activity of the broken rocks such as rock drilling, explosion is when thousands of meters of underground depth carries out, rock own temperature is much
Higher than room temperature, mechanical characteristic also with have bigger difference under normal temperature state, there are many conventional rock mechanics are unaccountable existing
As, such as: a wide range of subregion of rock mass, which ruptures, rock burst is abnormal, rock mass is crisp prolongs conversion.
Under great burying environment, because of the presence of high-ground stress, the various stress conditions of underground engineering are sufficiently complex, along with height
The influence of ground temperature factor, underground engineering increase the control difficulty of country rock during carrying out.Accordingly, it is considered to which High-geotemperature environment is over the ground
The influence of lower engineering has very important significance.Great burying under coupling thermal and mechanical effect in order to study temperature field and stress field
The problems caused by engineering activity, it is necessary to simulate the highland thermal field in buried underground environment, this just need to invent it is a set of can be to rock
Stone sample physical model carries out the loading system that heating obtains uniform and stable temperature field, and more true simulation is actually
Warm condition.
Currently, heating method spininess used by study of rocks thermodynamic properties carries out small size rock sample, such as utilize
Baking oven heats small size rock sample, is for another example carried out with oil temperature to small-sized rock sample during high-temperature triaxial test
Heating.These can not simulate the mechanical property of construction of underground structure rock mass for the heating method of small size rock sample, and
Existing deep underground engineering physical simulation experiment is again almost without the influence for considering ground temperature.Therefore, it is tried for large scale rock
The method and apparatus that sample physical model is heated and realizes temperature field simulation, there is presently no correlative studys.
Summary of the invention
In view of not yet presence is heated for large scale rock sample physical model and realizes temperature field simulation at present
Method and apparatus, the purpose of the present invention is to provide a kind of temperature loading systems for simulating underground engineering ground temperature.
Technical problem solved by the invention can be realized using following technical scheme: a kind of simulation underground engineering ground temperature
Temperature loading system, including thermocouple, temperature controller, A.C. contactor and at least 4 heating rods, after heating rod is in parallel with
A.C. contactor series connection, temperature controller connects with thermocouple, and A.C. contactor is in parallel with temperature controller, A.C. contactor with
Temperature controller respectively connects power supply, and thermocouple and heating rod are embedded in rock sample physical model.
Currently preferred, above-mentioned temperature controller is digital display adjusting apparatus.
By connecting above-mentioned temperature controller with above-mentioned A.C. contactor, temperature controller can be made according to presetting
Temperature value control A.C. contactor connect or tripping, realize adjusting to rock sample physical model temperature field.
Currently preferred, above-mentioned heating rod arrangement surrounds at least 1 circle square, and the centroid and rock of each circle square are tried
The central point of sample physical model is overlapped, and the side length formula of each circle square isUnit:
Rice, n indicate the n-th circle square that heating rod arrangement surrounds from inside to outside, anIndicate that heating rod arranges n-th surrounded from inside to outside
Enclose the side length of square.
Currently preferred, above-mentioned heating rod equidistant placement in each edge of same circle square is being embedded in the n-th circle just
The quantity of heating rod on rectangular position is according to formula Jn=(n+1) × 4-4 can be calculated, unit: root, and the n-th circle square is every
Heating rod quantity on side is n+1 root, and n indicates the n-th circle square that heating rod arrangement surrounds from inside to outside, JnIt indicates by interior
It is embedded in the quantity of the heating rod in the n-th circle pros shaped position outward.
Currently preferred, the power of above-mentioned heating rod is 400~1600w.
Above-mentioned heating rod is arranged in the manner described above, can be realized and the uniform of rock sample physical model is added
Heat.By the way that the power supply of A.C. contactor control heating rod can be made by above-mentioned heating rod and the series connection of above-mentioned A.C. contactor, make to add
Hot pin heating stops heating, to realize the stability contorting to rock sample physical model temperature field.
Currently preferred, above-mentioned thermocouple temperature measurement range is 0 DEG C~400 DEG C, and thermocouple is embedded in be heated from inside to outside
On the midpoint on the 1st any side of circle square that stick arrangement surrounds.
Above-mentioned thermocouple is embedded in rock sample physical model, is capable of the temperature of real-time detection rock sample physical model
Degree.By the way that above-mentioned thermocouple is connect with above-mentioned temperature controller, the temperature that temperature controller can be made to show that thermocouple detects
Spend situation.Thermocouple is embedded on the midpoint on the 1st any side of circle square that heating rod arrangement from inside to outside surrounds, so that thermoelectricity
Occasionally the temperature near the wall of tunnel excavation part hole can be detected and influenced by tunnel excavation.
In view of the above-mentioned heating rod of outermost layer will have 3 centimetres or so of protective layer, thus a kind of above-mentioned simulation underground engineering
It is a that the temperature loading system of ground temperature, which is applied to side length a,n+ 0.03≤a < an+1+ 0.03 rock sample physical model, unit:
Rice, a indicate the side length of rock sample physical model, anIndicate the side for the n-th circle square that heating rod arrangement surrounds from inside to outside
It is long, an+1Indicate the side length for the (n+1)th circle square that heating rod arrangement surrounds from inside to outside.
A kind of temperature loading method for simulating underground engineering ground temperature, including it is above-mentioned thermocouple, above-mentioned temperature controller, above-mentioned
A.C. contactor and at least 4 above-mentioned heating rods are connected after heating rod is in parallel with A.C. contactor, temperature controller and thermocouple
Series connection, A.C. contactor is in parallel with temperature controller, and A.C. contactor and temperature controller respectively connect power supply, thermocouple with add
Hot pin is embedded in rock sample physical model, and temperature controller is detected by comparison predetermined temperature and thermocouple
The temperature of rock sample physical model, control A.C. contactor is connected or tripping, causes heating rod to rock sample physical model
Heating stops heating.
Compared with prior art, the beneficial effects of the present invention are: can be applied to large scale subsurface rock sample physical model
Add uniform, temperature-adjustable value temperature field, and energy real-time control temperature field makes its keep stablizing；Since component used is simple
It is easy to get, thus the system simple structure, easy to operate, cheap；In addition heating rod can also be adjusted flexibly according to the actual situation
Quantity, to adapt to the experimental study needs of different size rock sample physical models.
Detailed description of the invention
Fig. 1 is a kind of circuit diagram of temperature loading system for simulating underground engineering ground temperature of the present invention.
Fig. 2 is the heating rod and thermocouple plane of a kind of temperature loading system for simulating underground engineering ground temperature of the present invention
Layout drawing.
Specific embodiment
As shown in Figure 1, the present invention includes thermocouple 1, temperature controller 2, A.C. contactor 3 and heating rod 4, heating rod 4
It connects after parallel connection with A.C. contactor 3, A.C. contactor 3 is in parallel with temperature controller 2, and temperature controller 2 and thermocouple 1 are gone here and there
Connection, A.C. contactor 3 and temperature controller 2 respectively connect power supply, and thermocouple 1 and heating rod 4 are embedded to rock sample physics mould
In type.
Wherein, temperature control system is made of temperature controller 2, A.C. contactor 3 and heating rod 4, temperature monitoring system
It is made of temperature controller 2 and thermocouple 1.
Embodiment 1
N=1 is substituted into formulaJn=(n+1) × 4-4 and rock sample physics
The side size range a of modeln+ 0.03≤a < an+1+ 0.03 can obtain: heating rod arrangement surrounds 1 circle square, the centroid of the square
It is overlapped with the central point of rock sample physical model, which is 0.177 meter, buries 4 heating rods, the square altogether
2 heating rods are buried in each edge, the present embodiment is suitable for the rock sample physics mould that side size range is 0.207~0.433 meter
Type.
Embodiment 2
As shown in Fig. 2, n=2 is substituted into formulaJn=(n+1) × 4-4 and rock
The side size range a of stone sample physical modeln+ 0.03≤a < an+1+ 0.03 can obtain: heating rod arrangement surrounds 2 circles square, owns
The centroid of 2 circle squares is overlapped with the central point of rock sample physical model；The square side length of 1st circle is 0.177 meter, is buried altogether
If 4 heating rods, 2 heating rods are buried in the circle square each edge；The square side length of 2nd circle is 0.403 meter, buries 8 altogether
Root heating rod buries 3 heating rods in the circle square each edge；All upper inbuilt heating rod sums of 2 circle square are 12
Root, the present embodiment are suitable for the rock sample physical model that side size range is 0.433~0.659 meter.
Embodiment 3
N=5 is substituted into formulaJn=(n+1) × 4-4 and rock sample physics
The side size range a of modeln+ 0.03≤a < an+1+ 0.03 can obtain: heating rod, which is arranged, from inside to outside surrounds 5 circles square, and all 5
The centroid of circle square is overlapped with the central point of rock sample physical model；The square side length of 1st circle is 0.177 meter, is buried altogether
If 4 heating rods, 2 heating rods are buried in the circle square each edge；The square side length of 2nd circle is 0.403 meter, buries 8 altogether
Root heating rod buries 3 heating rods in the circle square each edge；The square side length of 3rd circle is 0.629 meter, buries 12 altogether
Heating rod buries 4 heating rods in the circle square each edge；The square side length of 4th circle is 0.856 meter, buries 16 altogether and adds
Hot pin buries 5 heating rods in the circle square each edge；The square side length of 5th circle is 1.082 meters, buries 20 heating altogether
Stick buries 6 heating rods in the circle square each edge；All upper inbuilt heating rod sums of 5 circle square are 60, this reality
Apply the rock sample physical model that example is 1.112~1.338 meters suitable for side size range.
This system is not limited to the above embodiments, and lists partial data as shown in the table:
1 heating rod of table buries parameter and rock sample physical model size range tables of data
The rock burst physical analogy being applied under the coupling thermal and mechanical effect of temperature field and stress field due to this system, test weight
The temperature field of point concern tunneling hole wall nearby (i.e. rock burst range), thus that thermocouple 1 is embedded in that heating rod 4 surrounds
On the midpoint on the 1 any side of circle square, thermocouple 1 can be made to detect the temperature of (i.e. rock burst range) near Tunnel wall in this way,
It is not influenced again by tunnel excavation.
All heating rods 4 are parallel on a power supply line, then are connected with A.C. contactor 3, and the work of heating rod 4 is by exchanging
Contactor 3 controls；A.C. contactor 3 and temperature controller 2 are in parallel, and temperature controller 2 controls A.C. contactor 3 and connects or jump
Lock；Thermocouple 1 and temperature controller 2 are connected, and temperature controller 2 is detected inside rock sample physical model by thermocouple 1
Temperature value；A.C. contactor 3 and temperature controller 2 respectively connect power supply.
Specific work process is:
Control temperature on temperature controller 2 is set first, when the temperature value that thermocouple 1 detects reaches temperature controller
When 2 preset control temperature value, temperature controller 2 forces A.C. contactor 3 to trip, and heating rod 4 stops working because of power-off, no
Rock sample physical model is heated again；When the temperature decline of rock sample physical model, the temperature that thermocouple 1 detects
When value is lower than 2 preset control temperature value of temperature controller, temperature controller 2 is turned on A.C. contactor 3 is controlled, thus
Heating rod 4 starts to heat rock sample physical model again.Two above control process is repeated, therefore can guarantee rock
Temperature value inside stone sample physical model is stablized in pre-set control temperature.
Above-described embodiment is presently preferred embodiments of the present invention, is not a limitation on the technical scheme of the present invention, and is not being taken off
Under the premise of from spirit and scope of the invention, various changes and improvements may be made to the invention, these changes and improvements are regarded as
It falls into scope of the claimed invention.
Claims (5)
1. a kind of temperature loading system for simulating underground engineering ground temperature, it is characterised in that: including thermocouple (1), temperature controller
(2), A.C. contactor (3) and at least 4 heating rods (4) are connected after heating rod (4) is in parallel with A.C. contactor (3), temperature control
Instrument (2) processed is connected with thermocouple (1), and A.C. contactor (3) is in parallel with temperature controller (2), A.C. contactor (3) and temperature control
Instrument (2) processed respectively connects power supply, and thermocouple (1) and heating rod (4) are embedded in rock sample physical model；
Heating rod (4) arrangement surrounds at least 1 and encloses square, the centroid and rock sample physical model of each circle square
Central point is overlapped, and the side length formula of each circle square is an=√ 2(0.08(2n-1)+0.045), unit: rice, n are indicated by interior
The n-th circle square that heating rod (4) arrangement surrounds, an indicate that heating rod (4) arranges n-th surrounded from inside to outside outward
Enclose the side length of square；
The heating rod (4) equidistant placement in each edge of same circle square, is embedded in the n-th circle pros shaped position
The quantity of heating rod (4) can be calculated according to formula Jn=(n+1) × 4-4, unit: root, and n-th encloses in square each edge
Heating rod (4) quantity be n+1 root, n indicate from inside to outside heating rod (4) arrangement surround n-th circle square, Jn table
Show the quantity for the heating rod (4) being embedded in the n-th circle pros shaped position from inside to outside.
2. a kind of temperature loading system for simulating underground engineering ground temperature according to claim 1, it is characterised in that: the temperature
Spending controller (2) is digital display adjusting apparatus.
3. a kind of temperature loading system for simulating underground engineering ground temperature according to claim 1, it is characterised in that: described to add
The power of hot pin (4) is 400 ~ 1600w.
4. a kind of temperature loading system for simulating underground engineering ground temperature according to claim 1, it is characterised in that: the heat
Galvanic couple (1) temperature-measuring range is 0 °C ~ 400 °C, and thermocouple (1) is embedded in the 1st circle that heating rod (4) arrangement from inside to outside surrounds
On the midpoint on square any side.
5. a kind of temperature loading method for simulating underground engineering ground temperature, it is characterised in that: will be hot in the way of claim 1
Galvanic couple (1), temperature controller (2), A.C. contactor (3) and heating rod (4) are attached, and thermocouple (1) and heating rod (4) are equal
It is embedded in rock sample physical model, temperature controller (2) is detected by comparison predetermined temperature and thermocouple (1)
The temperature of rock sample physical model, control A.C. contactor (3) is connected or tripping, causes heating rod (4) to rock sample object
It manages model heating or stops heating.
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|---|---|---|---|---|
| US6071008A (en) * | 1997-01-28 | 2000-06-06 | Nagoya University | Method of measuring heat capacity of sample |
| CN2466645Y (en) * | 2001-02-09 | 2001-12-19 | 大庆油田有限责任公司 | Soil thermophysical nature measurer |
| CN101545879A (en) * | 2009-05-07 | 2009-09-30 | 天津大学 | Cable expansion factor determination instrument |
| CN202564502U (en) * | 2012-03-26 | 2012-11-28 | 安徽理士电源技术有限公司 | Heating control circuit, electric heating equipment and temperature control system |
| CN102852517A (en) * | 2012-09-07 | 2013-01-02 | 中国石油天然气集团公司 | Physical simulation method and device for formation temperature and pressure one-dimensional distribution |
-
2016
- 2016-06-30 CN CN201610505648.3A patent/CN106226341B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6071008A (en) * | 1997-01-28 | 2000-06-06 | Nagoya University | Method of measuring heat capacity of sample |
| CN2466645Y (en) * | 2001-02-09 | 2001-12-19 | 大庆油田有限责任公司 | Soil thermophysical nature measurer |
| CN101545879A (en) * | 2009-05-07 | 2009-09-30 | 天津大学 | Cable expansion factor determination instrument |
| CN202564502U (en) * | 2012-03-26 | 2012-11-28 | 安徽理士电源技术有限公司 | Heating control circuit, electric heating equipment and temperature control system |
| CN102852517A (en) * | 2012-09-07 | 2013-01-02 | 中国石油天然气集团公司 | Physical simulation method and device for formation temperature and pressure one-dimensional distribution |
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