CN105910860B - The preparation method of specific moisture content rock sample under a kind of non-water-saturated state - Google Patents
The preparation method of specific moisture content rock sample under a kind of non-water-saturated state Download PDFInfo
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- CN105910860B CN105910860B CN201610221992.XA CN201610221992A CN105910860B CN 105910860 B CN105910860 B CN 105910860B CN 201610221992 A CN201610221992 A CN 201610221992A CN 105910860 B CN105910860 B CN 105910860B
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- 239000011435 rock Substances 0.000 title claims abstract description 305
- 229920006395 saturated elastomer Polymers 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 106
- 238000001035 drying Methods 0.000 claims abstract description 76
- 239000012153 distilled water Substances 0.000 claims abstract description 17
- 238000007654 immersion Methods 0.000 claims abstract description 16
- 238000010998 test method Methods 0.000 claims abstract description 7
- 238000012360 testing method Methods 0.000 claims description 20
- 238000005303 weighing Methods 0.000 claims description 20
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 6
- 238000012797 qualification Methods 0.000 claims description 6
- 239000012173 sealing wax Substances 0.000 claims description 6
- 238000005464 sample preparation method Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 13
- 239000004575 stone Substances 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000009835 boiling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- G01N1/30—Staining; Impregnating ; Fixation; Dehydration; Multistep processes for preparing samples of tissue, cell or nucleic acid material and the like for analysis
Abstract
The present invention relates to a kind of preparation methods of specific moisture content rock sample under non-water-saturated state.Its technical solution is：(1) according to《99 Standard for test methods of engineering rock masses of GB/T50266》Make the rock sample of natural moisture content；(2) rock sample of natural moisture content is dried, the aerial quality m of rock sample after record drying1；(3) rock sample after drying is put into beaker (5) and distilled water (10) is added, the quality m of the rock sample after record drying in water2；(4) when quality readings of the rock sample in immersion water on precision balance (3) reach the Theoretical Mass m of specific moisture content rock sample in water3When to get meeting the specific moisture content rock sample of theoretical value；(5) it to get specific moisture content rock sample under non-water-saturated state when meeting the error ε of the practical moisture content of the specific moisture content rock sample of theoretical value≤5%, otherwise repeats the above steps.The present invention has the characteristics that method is simple and convenient to operate, efficiency is higher and precision is higher.
Description
Technical field
The invention belongs to specific moisture content rock sample technical fields.More particularly to specific aqueous under a kind of non-water-saturated state
The preparation method of rate rock sample.
Technical background
The content of water has extremely important influence, the same rock of different water cut normal physical-mechanical properties of rock
Often show the physico mechanical characteristic of bigger difference.In Practical Project, rock intensity in dry conditions and hardness all accord with
Engine request is closed, and it is commonplace to meet the phenomenon that rock strength after water is substantially reduced.On the one hand, water has centainly rock particles
Cementation, the especially more rock of argillaceous mineral meets water softening, directly affects deformation and the intensity of rock；It is another
Aspect, rock forming mineral particle can dissociate ion and molecule in the case where meeting water and chemistry occur instead with water and other minerals
It answers, rock is caused to be corroded and strength reduction.By rock mechanics experiment, the rock physics mechanical property under different water cut is studied
Confrontation rock mechanics, Tunnel Engineering, underground chamber, rock slope engineering etc. have great importance.Saturated rock is made at present
The method of sample is more, such as natural bowssening, boiling method and vacuum saturation；But it is that a certain under non-water-saturated state specific contains
The preparation method of water rate rock sample is met the requirements to selection by the unknown rock sample of a variety of moisture content of measurement
Moisture content sample, uncertainty is larger, less efficient, and the moisture content of rock sample is difficult to control.It is above-mentioned conventional a certain
It is required although specific moisture content rock sample preparation method can reach preparation to a certain extent, uncertainty is big and imitates
Rate is relatively low, such method is gradually eliminated, and the new method that under non-water-saturated state prepared by specific moisture content rock sample is also continuous
Exploration among.
Invention content
The present invention is directed to overcome the deficiencies of existing technologies, it is therefore an objective to provide a kind of method be simple and convenient to operate, efficiency compared with
High, specific moisture content rock sample under the higher non-water-saturated state of precision preparation method.
To achieve the above object, the technical solution adopted by the present invention comprises the concrete steps that：
Step 1: making the rock sample of natural moisture content
According to《GB/T50266-99 Standard for test methods of engineering rock masses》Make the rock sample of natural moisture content.
Step 2: weighing the aerial quality of rock sample after drying
The rock sample of the natural moisture content is put into oven, is dried 20~25 hours under the conditions of 115~120 DEG C,
The rock sample after drying is made；The rock sample after drying is placed on precision balance again and is weighed, the rock after record drying
The aerial quality m of sample1。
Step 3: quality when weighing the rock sample after drying in water
Rock sample after the drying is placed on " test device of rock sample moisture content under a kind of non-water-saturated state "
Chassis on, adjusting the mobile platform of the test device makes the chassis of Hanging Basket be 2~3cm at a distance from beaker bottom；Then
Distilled water is added into beaker, when the water surface of distilled water is higher than 3~5cm of rock sample after drying, weighs and records drying
Rock sample afterwards in water when quality m2。
Step 4: weighing the specific aerial quality of moisture content rock sample
Continue step 3, every quality of the rock sample in the immersion water of observation in 0.5~1 hour on precision balance
Reading, when the quality readings of the rock sample in immersion water reach the Theoretical Mass m of specific moisture content rock sample in water3
When, it is dried after taking-up, obtains the specific moisture content rock sample for meeting theoretical value；Then it weighs and records and described meet theoretical value
The aerial quality m of specific moisture content rock sample4。
The Theoretical Mass m of the specific moisture content rock sample in water3
m3=m2+m1×ω (1)
In formula (1)：m2Quality when indicating the rock sample after drying in water；
m1Indicate the aerial quality of rock sample after drying；
ω indicates the moisture content of specific moisture content rock sample.
Step 5: meeting the error rate of the practical moisture content of the specific moisture content rock sample of theoretical value
The practical moisture content ω ' of the specific moisture content rock sample for meeting theoretical value
The error rate ε of the practical moisture content of the specific moisture content rock sample for meeting theoretical value
In formula (2) and formula (3)：m1Indicate the aerial quality of rock sample after drying；
m4Indicate the specific aerial quality of moisture content rock sample for meeting theoretical value；
ω ' indicates the practical moisture content for meeting the specific moisture content rock sample of theoretical value；
ω indicates the moisture content of specific moisture content rock sample.
Step 6: under non-water-saturated state specific moisture content rock sample determination
As the error rate ε ＞ 5%, then the specific moisture content rock sample for meeting theoretical value is unqualified, repeats step
Two~step 5.
As the error rate ε≤5%, then meet the specific moisture content rock sample qualification of theoretical value to get non-full water
Specific moisture content rock sample under state；Specific moisture content rock sample surface under the non-water-saturated state is subjected to sealing wax, is protected
It deposits.
Under the non-water-saturated state test device of rock sample moisture content include holder, precision balance, Hanging Basket, beaker and
Mobile platform.
Holder is made of rectangular frame, top plate and bottom plate, the upper and lower part of rectangular frame be accordingly fixed with top plate and
Bottom plate.Mobile platform is provided on the bottom plate of holder, mobile platform is made of tablet, lead screw and pedestal, and the upper end of lead screw is fixed
It is connect with whorl of base in the lower end of the center position of tablet lower plane, lead screw.The center position of top plate is provided with through-hole, top
Precision balance is placed on plate, the hook of precision balance is located at the through-hole center, and Hanging Basket is hung on hook.
Beaker is placed on a mobile platform, and the bottom of Hanging Basket is located in beaker.
The hook of precision balance, the bottom centre of Hanging Basket, the center line of beaker and mobile platform center line be located at it is same
On plumb line.
The Hanging Basket is made of lanyard and chassis, and chassis is round reticular structure；The diameter on chassis is less than the diameter of beaker.
The range of the precision balance is 2~3Kg, precision 0.01g.
Due to the adoption of the above technical scheme, the present invention has the advantages that compared with prior art：
1. method is simple and convenient to operate
The present invention relates only to the basic behaviour of the rock sample preparation and drying and precision balance weighing of natural moisture content
Make, the rock sample after drying need to be only immersed in distilled water in specific moisture content rock sample preparation process, every 0.5~
Precision balance reading of observation in 1 hour, when the quality readings of the rock sample in immersion water reach specific moisture content rock examination
When sample Theoretical Mass in water, rock sample submerged in water being taken out in time, is then analyzed, there is method letter
Single, easy to operate feature.
2. efficiency is higher
The present invention uses a kind of test device of rock sample moisture content under non-water-saturated state to measure rock submerged in water
The water content of stone sample can observe the slight change of the quality of rock sample submerged in water in real time with precision balance,
That is the variation of moisture content；The uncertainty that conventional method is screened by measuring rock sample moisture content is overcome, is saved
A large amount of screening time, specific moisture content rock sample preparation efficiency is higher under non-water-saturated state.
3. precision is higher
The present invention uses precision to weigh the quality of rock sample for the precision balance of 0.01g, uses distilled water immersion rock
Sample, and acceptance test is carried out to the specific moisture content rock sample for meeting theoretical value, it is specific under prepared non-water-saturated state
The moisture content precision of moisture content rock sample is higher.
Therefore, the present invention has the characteristics that method is simple and convenient to operate, efficiency is higher and precision is higher, is suitable for meeting water
Be not disintegrated, do not dissolve and not drying shrinkage expansion non-water-saturated state under specific moisture content rock sample preparation.
Description of the drawings
Fig. 1 is that the structure of " test device of rock sample moisture content under a kind of non-water-saturated state " of the present invention is shown
It is intended to；
Fig. 2 is the schematic diagram that specific moisture content rock sample is tested using Fig. 1 shown devices.
Specific implementation method
The invention will be further described with reference to the accompanying drawings and detailed description, not to the limit of its protection domain
System.
In present embodiment, the test device of rock sample moisture content is as shown in Figure 1, packet under the non-water-saturated state
Include holder 1, precision balance 3, Hanging Basket 4, beaker 5 and mobile platform.
Holder 1 is made of rectangular frame, top plate and bottom plate, the upper and lower part of rectangular frame be accordingly fixed with top plate and
Bottom plate.Mobile platform is provided on the bottom plate of holder 1, mobile platform is made of tablet 7, lead screw 8 and pedestal 9, the upper end of lead screw 8
It is fixed on the center position of 7 lower plane of tablet, the lower end of lead screw 8 is threadedly coupled with pedestal 9.The center position of top plate is provided with
Through-hole is placed with precision balance 3 on top plate, and the hook 2 of precision balance 3 is located at the through-hole center, and Hanging Basket 4 hangs over hook 2
On.
Beaker 5 is placed on a mobile platform, and the bottom of Hanging Basket 4 is located in beaker 5.
The hook 2 of precision balance 3, the bottom centre of Hanging Basket 4, the center line of beaker 5 and mobile platform center line be located at
On same plumb line.
The Hanging Basket 4 is made of lanyard and chassis 6, and chassis 6 is round reticular structure；The diameter on chassis 6 is less than beaker 5
Diameter.
The range of the precision balance 3 is 2~3Kg, precision 0.01g.
It is repeated no more in embodiment.
Embodiment 1
The preparation method of specific moisture content rock sample under a kind of non-water-saturated state.
It is the step of preparation method described in the present embodiment：
Step 1: making the rock sample of natural moisture content
According to《GB/T50266-99 Standard for test methods of engineering rock masses》Make the rock sample of natural moisture content.The rock
Stone sample is the cylinder reference block of routine, and size is φ 50mm × 100mm.
Step 2: weighing the aerial quality of rock sample after drying
The rock sample of the natural moisture content is put into oven, is dried 20~25 hours under the conditions of 115~120 DEG C,
The rock sample after drying is made；The rock sample after drying is placed on precision balance again and is weighed, the rock after record drying
The aerial quality m of sample1For 528.34g.
Step 3: quality when weighing the rock sample after drying in water
Rock sample after the drying is placed on " test device of rock sample moisture content under a kind of non-water-saturated state "
Chassis 6 on, adjusting the mobile platform of the test device makes the chassis 6 of Hanging Basket 4 be 2~3cm at a distance from 5 bottom of beaker；
Then distilled water 10 is added into beaker 5, when the water surface of distilled water 10 is higher than 3~5cm of rock sample after drying, weighs simultaneously
Quality m when recording the rock sample after drying in water2For 332.06g.
Step 4: weighing the specific aerial quality of moisture content rock sample
Continue step 3, is read every quality of the rock sample in the immersion water of observation in 0.5 hour on precision balance 3
Number, when the quality readings of the rock sample in immersion water reach the Theoretical Mass m of specific moisture content rock sample in water3When,
It is dried after taking-up, obtains the specific moisture content rock sample for meeting theoretical value；Then it weighs and records and described meet theoretical value
The specific aerial quality m of moisture content rock sample4For 530.38g.
The Theoretical Mass m of the specific moisture content rock sample in water3
m3=m2+m1×ω (1)
In formula (1)：m2Quality when indicating the rock sample after drying in water, m2For 332.06g；
m1Indicate the aerial quality of rock sample after drying, m1For 528.34g；
ω indicates the moisture content of specific moisture content rock sample, the full water system of the specific moisture content rock sample of the present embodiment
Number is 50%, i.e. moisture content ω is 0.42%.
According to formula (1),
Step 5: meeting the error rate of the practical moisture content of the specific moisture content rock sample of theoretical value
The practical moisture content ω ' of the specific moisture content rock sample for meeting theoretical value
The error rate ε of the practical moisture content of the specific moisture content rock sample for meeting theoretical value
In formula (2) and formula (3)：m1Indicate the aerial quality of rock sample after drying, m1For 528.34g；
m4Indicate the specific aerial quality of moisture content rock sample for meeting theoretical value, m4For 530.38g；
ω ' indicates the practical moisture content for meeting the specific moisture content rock sample of theoretical value；
ω indicates the moisture content of specific moisture content rock sample, the full water system of the specific moisture content rock sample of the present embodiment
Number is 50%, i.e. moisture content ω is 0.42%.
According to formula (2) and (3),
Step 6: under non-water-saturated state specific moisture content rock sample determination
Due to the error rate ε ＞ 5%, then the specific moisture content rock sample for meeting theoretical value is unqualified, repeats step
Two~step 5.
In addition to following technical parameters, remaining is the same as above-mentioned rapid two~step 5：
In step 2, the aerial quality m of rock sample1For 528.86g.
In step 3, the rock sample after drying in water when quality m2For 332.54g.
In step 4, the aerial quality m of specific moisture content rock sample for meeting theoretical value4For 531.14g；
The Theoretical Mass m of the specific moisture content rock sample in water3For 334.76g.
In step 5, the practical moisture content ω ' of the specific moisture content rock sample for meeting theoretical value is 0.431%；
The error rate ε of the practical moisture content of the specific moisture content rock sample for meeting theoretical value is 2.4%.
Due to error rate ε≤5%, then meet the specific moisture content rock sample qualification of theoretical value to get non-full water
Specific moisture content rock sample under state；Specific moisture content rock sample surface under the non-water-saturated state is subjected to sealing wax, is protected
It deposits.
Embodiment 2
The preparation method of specific moisture content rock sample under a kind of non-water-saturated state.The step of preparation method described in the present embodiment
Suddenly it is：
Step 1: making the rock sample of natural moisture content
According to《GB/T50266-99 Standard for test methods of engineering rock masses》Make the rock sample of natural moisture content.The rock
Stone sample is the cylinder reference block of routine, and size is φ 50mm × 100mm.
Step 2: weighing the aerial quality of rock sample after drying
The rock sample of the natural moisture content is put into oven, is dried 20~25 hours under the conditions of 115~120 DEG C,
The rock sample after drying is made；The rock sample after drying is placed on precision balance again and is weighed, the rock after record drying
The aerial quality m of sample1For 531.87g.
Step 3: quality when weighing the rock sample after drying in water
Rock sample after the drying is placed on " test device of rock sample moisture content under a kind of non-water-saturated state "
Chassis 6 on, adjusting the mobile platform of the test device makes the chassis 6 of Hanging Basket 4 be 2~3cm at a distance from 5 bottom of beaker；
Then distilled water 10 is added into beaker 5, when the water surface of distilled water 10 is higher than 3~5cm of rock sample after drying, weighs simultaneously
Quality m when recording the rock sample after drying in water2For 335.55g.
Step 4: weighing the specific aerial quality of moisture content rock sample
Continue step 3, is read every quality of the rock sample in the immersion water of observation in 0.5 hour on precision balance 3
Number, when the quality readings of the rock sample in immersion water reach the Theoretical Mass m of specific moisture content rock sample in water3When,
It is dried after taking-up, obtains the specific moisture content rock sample for meeting theoretical value；Then it weighs and records and described meet theoretical value
The specific aerial quality m of moisture content rock sample4For 534.25g.
The Theoretical Mass m of the specific moisture content rock sample in water3
m3=m2+m1×ω (1)
In formula (1)：m2Quality when indicating the rock sample after drying in water, m2For 335.55g；
m1Indicate the aerial quality of rock sample after drying, m1For 531.87g；
ω indicates the moisture content of specific moisture content rock sample, the full water system of the specific moisture content rock sample of the present embodiment
Number is 60%, i.e. moisture content ω is 0.504%.
According to formula (1),
Step 5: meeting the error rate of the practical moisture content of the specific moisture content rock sample of theoretical value
The practical moisture content ω ' of the specific moisture content rock sample for meeting theoretical value
The error rate ε of the practical moisture content of the specific moisture content rock sample for meeting theoretical value
In formula (2) and formula (3)：m1Indicate the aerial quality of rock sample after drying, m1For 531.87g；
m4Indicate the specific aerial quality of moisture content rock sample for meeting theoretical value, m4For 534.62g；
ω ' indicates the practical moisture content for meeting the specific moisture content rock sample of theoretical value；
ω indicates the moisture content of specific moisture content rock sample, the full water system of the specific moisture content rock sample of the present embodiment
Number is 50%, i.e. moisture content ω is 0.42%.
According to formula (2) and (3),
Step 6: under non-water-saturated state specific moisture content rock sample determination
Due to error rate ε≤5%, then meet the specific moisture content rock sample qualification of theoretical value to get non-full water
Specific moisture content rock sample under state；Specific moisture content rock sample surface under the non-water-saturated state is subjected to sealing wax, is protected
It deposits.
Embodiment 3
The preparation method of specific moisture content rock sample under a kind of non-water-saturated state.The step of preparation method described in the present embodiment
Suddenly it is：
Step 1: making the rock sample of natural moisture content
According to《GB/T50266-99 Standard for test methods of engineering rock masses》Make the rock sample of natural moisture content.Institute's rock
Sample is the cylinder reference block of routine, and size is φ 50mm × 100mm.
Step 2: weighing the aerial quality of rock sample after drying
The rock sample of the natural moisture content is put into oven, is dried 20~25 hours under the conditions of 115~120 DEG C,
The rock sample after drying is made；The rock sample after drying is placed on precision balance again and is weighed, the rock after record drying
The aerial quality m of sample1For 530.14g.
Step 3: quality when weighing the rock sample after drying in water
Rock sample after the drying is placed on " test device of rock sample moisture content under a kind of non-water-saturated state "
Chassis 6 on, adjusting the mobile platform of the test device makes the chassis 6 of Hanging Basket 4 be 2~3cm at a distance from 5 bottom of beaker；
Then distilled water 10 is added into beaker 5, when the water surface of distilled water 10 is higher than 3~5cm of rock sample after drying, weighs simultaneously
Quality m when recording the rock sample after drying in water2For 333.79g.
Step 4: weighing the specific aerial quality of moisture content rock sample
Continue step 3, is read every quality of the rock sample in the immersion water of observation in 0.5 hour on precision balance 3
Number, when the quality readings of the rock sample in immersion water reach the Theoretical Mass m of specific moisture content rock sample in water3When,
It is dried after taking-up, obtains the specific moisture content rock sample for meeting theoretical value；Then it weighs and records and described meet theoretical value
The specific aerial quality m of moisture content rock sample4For 533.89g.
The Theoretical Mass m of the specific moisture content rock sample in water3
m3=m2+m1×ω (1)
In formula (1)：m2Quality when indicating the rock sample after drying in water, m2For 333.79g；
m1Indicate the aerial quality of rock sample after drying, m1For 530.14g；
ω indicates the moisture content of specific moisture content rock sample, the full water system of the specific moisture content rock sample of the present embodiment
Number is 80%, i.e. moisture content ω is 0.69%.
According to formula (1),
Step 5: meeting the error rate of the practical moisture content of the specific moisture content rock sample of theoretical value
The practical moisture content ω ' of the specific moisture content rock sample for meeting theoretical value
The error rate ε of the practical moisture content of the specific moisture content rock sample for meeting theoretical value
In formula (2) and formula (3)：m1Indicate the aerial quality of rock sample after drying, m1For 528.34g；
m4Indicate the specific aerial quality of moisture content rock sample for meeting theoretical value, m4For 533.89g；
ω ' indicates the practical moisture content for meeting the specific moisture content rock sample of theoretical value；
ω indicates the full water system of the specific moisture content rock sample of moisture content the present embodiment of specific moisture content rock sample
Number is 80%, i.e. moisture content ω is 0.69%..
According to formula (2) and (3),
Step 6: under non-water-saturated state specific moisture content rock sample determination
Due to error rate ε≤5%, then meet the specific moisture content rock sample qualification of theoretical value to get non-full water
Specific moisture content rock sample under state；Specific moisture content rock sample surface under the non-water-saturated state is subjected to sealing wax, is protected
It deposits.
Embodiment 4
The preparation method of specific moisture content rock sample under a kind of non-water-saturated state.The step of preparation method described in the present embodiment
Suddenly it is：
Step 1: making the rock sample of natural moisture content
According to《GB/T50266-99 Standard for test methods of engineering rock masses》Make the rock sample of natural moisture content.The rock
Stone sample is the cylinder reference block of routine, and size is φ 50mm × 100mm.
Step 2: weighing the aerial quality of rock sample after drying
The rock sample of the natural moisture content is put into oven, is dried 20~25 hours under the conditions of 115~120 DEG C,
The rock sample after drying is made；The rock sample after drying is placed on precision balance again and is weighed, the rock after record drying
The aerial quality m of sample1For 532.52g.
Step 3: quality when weighing the rock sample after drying in water
Rock sample after the drying is placed on " test device of rock sample moisture content under a kind of non-water-saturated state "
Chassis 6 on, adjusting the mobile platform of the test device makes the chassis 6 of Hanging Basket 4 be 2~3cm at a distance from 5 bottom of beaker；
Then distilled water 10 is added into beaker 5, when the water surface of distilled water 10 is higher than 3~5cm of rock sample after drying, weighs simultaneously
Quality m2 when recording the rock sample after drying in water is 336.15g.
Step 4: weighing the specific aerial quality of moisture content rock sample
Continue step 3, is read every quality of the rock sample in the immersion water of observation in 0.5 hour on precision balance 3
Number, when the quality readings of the rock sample in immersion water reach the Theoretical Mass m3 of specific moisture content rock sample in water,
It is dried after taking-up, obtains the specific moisture content rock sample for meeting theoretical value；Then it weighs and records and described meet theoretical value
The specific aerial quality m of moisture content rock sample4For 535.75g.
The Theoretical Mass m of the specific moisture content rock sample in water3
m3=m2+m1×ω (1)
In formula (1)：m2Quality when indicating the rock sample after drying in water；
m1Indicate the aerial quality of rock sample after drying；
ω indicates the moisture content of specific moisture content rock sample, the full water system of the specific moisture content rock sample of the present embodiment
Number is 70%, i.e. moisture content ω is 0.59%.
According to formula (1),
Step 5: meeting the error rate of the practical moisture content of the specific moisture content rock sample of theoretical value
The practical moisture content ω ' of the specific moisture content rock sample for meeting theoretical value
The error rate ε of the practical moisture content of the specific moisture content rock sample for meeting theoretical value
In formula (2) and formula (3)：m1Indicate the aerial quality of rock sample after drying, m1For 532.52g；
m4Indicate the specific aerial quality of moisture content rock sample for meeting theoretical value, m4For 535.75g；
ω ' indicates the practical moisture content for meeting the specific moisture content rock sample of theoretical value；
ω indicates the moisture content of specific moisture content rock sample, the full water system of the specific moisture content rock sample of the present embodiment
Number is 70%, i.e. moisture content ω is 0.59%.
Step 6: under non-water-saturated state specific moisture content rock sample determination
Due to error rate ε≤5%, then meet the specific moisture content rock sample qualification of theoretical value to get non-full water
Specific moisture content rock sample under state；Specific moisture content rock sample surface under the non-water-saturated state is subjected to sealing wax, is protected
It deposits.Present embodiment has the advantages that compared with prior art：
1. method is simple and convenient to operate
Present embodiment relate only to natural moisture content rock sample prepare and drying and precision balance weigh
Basic operation, the rock sample after drying need to be only immersed in distilled water in specific moisture content rock sample preparation process,
Every the precision balance reading of observation in 0.5 hour, when the quality readings of the rock sample in immersion water reach specific moisture content
When rock sample Theoretical Mass in water, rock sample submerged in water is taken out in time, is then analyzed, is had
The characteristics of method is simple and convenient to operate.
2. efficiency is higher
Present embodiment uses a kind of test device measurement of rock sample moisture content under non-water-saturated state to be immersed in
The water content of rock sample in water, i.e., with precision balance can observe in real time rock sample submerged in water quality it is thin
Microvariations, the i.e. variation of moisture content；The uncertainty that conventional method is screened by measuring rock sample moisture content is overcome,
A large amount of screening time is saved, specific moisture content rock sample preparation efficiency is higher under non-water-saturated state.
3. precision is higher
Present embodiment uses precision to weigh the quality of rock sample for the precision balance of 0.01g, uses distilled water
Rock sample is impregnated, and acceptance test is carried out to the specific moisture content rock sample for meeting theoretical value, prepared is non-full watery
The moisture content precision of specific moisture content rock sample is higher under state.
Therefore, present embodiment has the characteristics that method is simple and convenient to operate, efficiency is higher and precision is higher, fits
Be not disintegrated for meeting water, do not dissolve and not drying shrinkage expansion non-water-saturated state under specific moisture content rock sample preparation.
Claims (3)
1. the preparation method of specific moisture content rock sample under a kind of non-water-saturated state, it is characterised in that the tool of the preparation method
Body step is：
Step 1: making the rock sample of natural moisture content
According to《GB/T50266-99 Standard for test methods of engineering rock masses》Make the rock sample of natural moisture content；
Step 2: weighing the aerial quality of rock sample after drying
The rock sample of the natural moisture content is put into oven, is dried 20~25 hours under the conditions of 115~120 DEG C, is made
Rock sample after drying；The rock sample after drying is placed on precision balance again and is weighed, the rock sample after record drying
Aerial quality m1；
Step 3: quality when weighing the rock sample after drying in water
Rock sample after the drying is placed on to the bottom of " test device of rock sample moisture content under a kind of non-water-saturated state "
On disk (6), adjust the test device mobile platform make the chassis (6) of Hanging Basket (4) at a distance from beaker (5) bottom for 2~
3cm；Then distilled water (10) is added into beaker (5), the rock sample 3 after the water surface of distilled water (10) is higher than drying~
When 5cm, quality m when weighing and recording the rock sample after drying in water2；
Step 4: weighing the specific aerial quality of moisture content rock sample
Continue step 3, every quality of the rock sample in the immersion water of observation in 0.5~1 hour on precision balance (3)
Reading, when the quality readings of the rock sample in immersion water reach the Theoretical Mass m3 of specific moisture content rock sample in water
When, it is dried after taking-up, obtains the specific moisture content rock sample for meeting theoretical value；Then it weighs and records and described meet theoretical value
The aerial quality m of specific moisture content rock sample4；
The Theoretical Mass m of the specific moisture content rock sample in water3
m3=m2+m1×ω (1)
In formula (1)：m2Quality when indicating the rock sample after drying in water,
m1Indicate the aerial quality of rock sample after drying,
ω indicates the moisture content of specific moisture content rock sample；
Step 5: meeting the error rate of the practical moisture content of the specific moisture content rock sample of theoretical value
The practical moisture content ω ' of the specific moisture content rock sample for meeting theoretical value
The error rate ε of the practical moisture content of the specific moisture content rock sample for meeting theoretical value
In formula (2) and formula (3)：m1Indicate the aerial quality of rock sample after drying,
m4Indicate the specific aerial quality of moisture content rock sample for meeting theoretical value,
ω ' indicates the practical moisture content for meeting the specific moisture content rock sample of theoretical value,
ω indicates the moisture content of specific moisture content rock sample；
Step 6: under non-water-saturated state specific moisture content rock sample determination
As the error rate ε>When 5%, then the specific moisture content rock sample for meeting theoretical value is unqualified, repeats step 2~step
Rapid five；
As the error rate ε≤5%, then meet the specific moisture content rock sample qualification of theoretical value to get non-water-saturated state
Under specific moisture content rock sample；Specific moisture content rock sample surface under the non-water-saturated state is subjected to sealing wax, is preserved；
Under the non-water-saturated state test device of rock sample moisture content include holder (1), precision balance (3), Hanging Basket (4),
Beaker (5) and mobile platform；
Holder (1) is made of rectangular frame, top plate and bottom plate, and the upper and lower part of rectangular frame is accordingly fixed with top plate and bottom
Plate；Mobile platform is provided on the bottom plate of holder (1), mobile platform is made of tablet (7), lead screw (8) and pedestal (9), lead screw
(8) upper end is fixed on the center position of tablet (7) lower plane, and the lower end of lead screw (8) is threadedly coupled with pedestal (9)；Top plate
Center position be provided with through-hole, precision balance (3) is placed on top plate, the hook (2) of precision balance (3) is located at the through-hole
At center, Hanging Basket (4) is hung on hook (2)；
Beaker (5) is placed on a mobile platform, and the bottom of Hanging Basket (4) is located in beaker (5)；
The hook (2) of precision balance (3), the bottom centre of Hanging Basket (4), beaker (5) center line and mobile platform center line
On same plumb line.
2. according to claim 1 under non-water-saturated state specific moisture content rock sample preparation method, it is characterised in that institute
It states Hanging Basket (4) to be made of lanyard and chassis (6), chassis (6) are round reticular structure；The diameter on chassis (6) is less than beaker (5)
Diameter.
3. according to claim 1 under non-water-saturated state specific moisture content rock sample preparation method, it is characterised in that institute
The range for stating precision balance (3) is 2~3Kg, precision 0.01g.
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| CN108168978A (en) * | 2018-01-12 | 2018-06-15 | 西安科技大学 | Coal sample manual humidification's quantification control method and device |
| CN110895217B (en) * | 2019-11-29 | 2021-09-10 | 昆明理工大学 | Method for making spots on surface of saturated rock test piece applied to digital speckles |
| CN111487104B (en) * | 2020-05-29 | 2023-08-01 | 煤炭科学技术研究院有限公司 | Experimental device and method for manufacturing test pieces with different water contents |
| CN112505293B (en) * | 2020-11-17 | 2022-05-24 | 贵州大学 | Intelligent measuring cup for measuring rock water absorption in real time and using method thereof |
| CN114674707A (en) * | 2022-02-23 | 2022-06-28 | 山东大学 | Rock sample water content control device and real-time testing method |
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| CN102393320A (en) * | 2011-09-21 | 2012-03-28 | 中国科学院武汉岩土力学研究所 | Preparation method of rock test samples with different water ratios |
| CN103994908A (en) * | 2014-05-26 | 2014-08-20 | 中国矿业大学(北京) | Method for accurately preparing experiment test samples with different water contents |
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| CN105115793A (en) * | 2015-06-26 | 2015-12-02 | 河海大学 | Method for rapidly preparing samples with different water saturations |
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