CN108318395A - A kind of cementing paste body filling body strength prediction method of tailings - Google Patents
A kind of cementing paste body filling body strength prediction method of tailings Download PDFInfo
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- CN108318395A CN108318395A CN201711313074.0A CN201711313074A CN108318395A CN 108318395 A CN108318395 A CN 108318395A CN 201711313074 A CN201711313074 A CN 201711313074A CN 108318395 A CN108318395 A CN 108318395A
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- body filling
- prediction method
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- 238000000034 method Methods 0.000 title claims abstract description 45
- 239000000463 material Substances 0.000 claims abstract description 21
- 238000012360 testing method Methods 0.000 claims abstract description 21
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052753 mercury Inorganic materials 0.000 claims abstract description 15
- 238000005070 sampling Methods 0.000 claims abstract description 13
- 238000002474 experimental method Methods 0.000 claims abstract description 9
- 239000002674 ointment Substances 0.000 claims abstract description 9
- 239000006210 lotion Substances 0.000 claims abstract description 8
- 238000009533 lab test Methods 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims description 12
- 238000001291 vacuum drying Methods 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 5
- 230000001186 cumulative effect Effects 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000034994 death Effects 0.000 description 1
- 231100000517 death Toxicity 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/088—Investigating volume, surface area, size or distribution of pores; Porosimetry
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of cementing paste body filling body strength prediction methods of tailings, the strength prediction method is first sampled live paste body filling body, the micropore structure of sample is measured followed by pressure mercury experiment, pass through the micropore structure of test site ointment material, then according to the relationship between the uniaxial compressive strength of ointment material and micropore structure, calculate the uniaxial compressive strength value of prediction lotion, this method predicts the intensity of underground site paste body filling body in such a way that field sampling and laboratory test are combined.The present invention can it is simple and fast accurately predict underground site paste body filling body intensity, can be making rational planning for for shaft production reliable basis be provided, have wide applicability.The present invention is that a kind of science is reliable, the strength prediction method of the cementing paste body filling body of tailings that can be combined in laboratory with on-the-spot test, and scientific and reasonable plan of arranging production, raising production efficiency and guaranteeing safe production is had a very important significance.
Description
Technical field
The invention belongs to mine paste body filling engineering and the estimated correlative technology fields of the filling in mine strength of materials, specifically
It is to be related to a kind of cementing paste body filling body strength prediction method of tailings.
Background technology
The cementing paste filling material of tailings is made of total tailings, cementitious matter and water, and paste body filling has stability
Good, not stratified isolation, without the remarkable advantages such as dehydration and fed distance be remote, be the development trend of the following mine filling technology.Its
The intensity of middle obturation is mostly important one of the evaluation index of paste body filling quality, directly decides the excavation of adjacent ore pillar
Time, excavation may cause collapsing for obturation, the serious injures and deaths that can cause personnel too early；Excavation can then reduce mine too late
The direct economic benefit on mountain.Therefore, the estimated of paste body filling body intensity is particularly important the safety and high efficiency in mine.
The method that live paste body filling body intensity is obtained in currently available technology mainly has live coring method of testing and experiment
Analogy method is tested in room.Live coring method enforcement difficulty is big, needs acquisition sample size big, and location of the coring procedure can be damaged inevitably
The integrality of evil sample, to influence the accuracy of test result.And for pure laboratory test analogy method, due to laboratory item
Part can not simulate subsurface environment completely（Temperature, humidity, drainage condition）, Stope dimension effect and consolidation effect etc., therefore with it is existing
There are larger differences for field.
If it is possible to the tailings glue for proposing that a kind of science is reliable, capable of being combined in laboratory with on-the-spot test
The strength prediction method for tying paste body filling body for scientific and reasonable plan of arranging production, raising production efficiency, guarantees safe production
It has a very important significance.
Invention content
The present invention provides a kind of accurately and reliably cementing paste body filling body of tailings to overcome the shortcomings of the prior art
Strength prediction method, this method speculate the intensity of obturation by the micropore structure that scene is materialsed, the purpose is to
Reasonable selection for adjacent ore pillar digging time provides reliable foundation.
The present invention is achieved by the following technical solutions：A kind of cementing paste body filling body strength prediction method of tailings, should
Method is first sampled live paste body filling body, and the micropore structure of sample is measured followed by pressure mercury experiment, is passed through
The micropore structure of test site ointment material, then according to the uniaxial compressive strength of ointment material and micropore structure it
Between relationship, to calculate the uniaxial compressive strength value of prediction lotion, this method is combined with field sampling and laboratory test
Mode predicts the intensity of underground site paste body filling body.
The estimated process of strength prediction method of the present invention specifically comprises the following steps：
A. field sampling：Core boring sampling is carried out to live paste body filling body, the diameter of drill core is not less than 100mm, the length of drill core
Not less than 100mm；
B. it is dried：It will materials and do not cut into 1cm by the intact part that drill core is influenced3Left and right blockage, then into
The processing of row dehydration and drying；
It includes two processes of microwave drying and vacuum drying to be dried step；Microwave drying process is that sample is placed on microwave
Dry 5~10min in drying machine, the operating power of microwave dryer are not less than 800W, and the working frequency of microwave dryer is
2.45GHz；Process of vacuum drying is that sample is placed in 35 DEG C of vacuum drying oven to be dried, until constant weight.
C. pressure mercury porosity test：Press mercury porosity test test environment be nitrogen, the rate of heat addition not higher than 10 DEG C/
Min finally obtains the micropore structure Distribution Value of sample；
D. the uniaxial compressive strength of live paste body filling body is calculated by following equation：
σc=σ0(1-n)a(1-n≥d)b。
In formula：σcFor the uniaxial compressive strength of live obturation；σ0For reference of the material when perfect condition porosity is 0
Intensity；nFor the overall porosity for the sample that pressure mercury experiment measures；n≥dIt is more than or equal to for aperturedHole cumulative porosity rate；aWithbFor with the relevant constant of material character.
The present invention is a kind of lotion strength prediction method based on uniaxial compressive strength-micropore structure relationship, uniaxial
Relationship between compression strength-micropore structure obtains in a large amount of laboratory testing analysis.This method is in practical fortune
Used time need to only obtain a small amount of sample at the scene, and then measuring its micropore structure using pressure mercury experiment is distributed, and can calculate
To the intensity value of live paste body filling body.
The beneficial effects of the invention are as follows：The invention belongs to a kind of tailings body strength of filling mass method for predicting, this method passes through
The micropore structure of test site ointment material, be then based on ointment material uniaxial compressive strength-micropore structure it
Between relationship, come calculate prediction lotion uniaxial compressive strength value.The method is combined with field sampling and laboratory test
Mode simple and fast can accurately be predicted to obtain the intensity of underground site paste body filling body, can be the reasonable rule of shaft production
It draws and reliable basis is provided, there is wide applicability.The present invention be a kind of science it is reliable, can be by laboratory and on-the-spot test
The strength prediction method for the cementing paste body filling body of tailings being combined for scientific and reasonable plan of arranging production, improves production effect
Rate, guaranteeing safe production has a very important significance.
Specific implementation mode
Below in conjunction with specific implementation mode, the present invention is described in detail.
A kind of cementing paste body filling body strength prediction method of tailings, this method first take live paste body filling body
Sample measures the micropore structure of sample followed by pressure mercury experiment, by the micropore structure of test site ointment material,
Then according to the relationship between the uniaxial compressive strength of ointment material and micropore structure, the single shaft to calculate prediction lotion resists
Pressure angle value, this method predict the strong of underground site paste body filling body in such a way that field sampling and laboratory test are combined
Degree.
The estimated process of strength prediction method of the present invention specifically comprises the following steps：
A. field sampling：Core boring sampling is carried out to live paste body filling body, the diameter of drill core is not less than 100mm, the length of drill core
Not less than 100mm；
B. it is dried：It will materials and do not cut into 1cm by the intact part that drill core is influenced3Blockage, then taken off
Water is dried；
It includes two processes of microwave drying and vacuum drying to be dried step；Microwave drying process is that sample is placed on microwave
Dry 5~10min in drying machine, the operating power of microwave dryer are not less than 800W, and the working frequency of microwave dryer is
2.45GHz；Process of vacuum drying is that sample is placed in 35 DEG C of vacuum drying oven to be dried, until constant weight；
C. pressure mercury porosity test：It is nitrogen to press the test environment of mercury porosity test, and the rate of heat addition is not higher than 10 DEG C/min, most
The micropore structure Distribution Value of sample is obtained eventually；
D. the uniaxial compressive strength of live paste body filling body is calculated by following equation：
σc=σ0(1-n)a(1-n≥d)b；
In formula：σcFor the uniaxial compressive strength of live obturation；σ0It is strong for reference of the material when perfect condition porosity is 0
Degree；nFor the overall porosity for the sample that pressure mercury experiment measures；n≥dIt is more than or equal to for aperturedHole cumulative porosity rate；aWithb
For with the relevant constant of material character.
Embodiment：The work of paste body filling body intensity-micropore structure is carried out by taking paste body filling engineering under certain mine as an example
Journey practical proof.
The lotion that scene filling uses is made of adopting iron ore tailings, Portland cement and underground water, cement and iron ore tail
The mass ratio of sand is 1:15, solid masses a concentration of 81%.
1）Field sampling：Paste body filling body is sampled in underground first, a diameter of 100mm of sampling instrument, length
For 200mm；
2）It is dried：The sample of acquirement is cut into 1cm3Sample when drying process, is placed on by the blockage of left and right first
Dry 6min, operating power 700W, working frequency 2.45GHz in GJWB08S-3Z type microwave dryers；It then will examination
Sample is placed in 35 DEG C of Thermo Fisher LS-VO20 type vacuum drying ovens and dries for 24 hours；
3）Press mercury porosity test：Test environment is nitrogen, and the rate of heat addition is 10 DEG C/min, finally obtains the microscopic void of sample
Structure, micropore structure include pore size distribution and cumulative porosity volume；
4）It is indicated by following equation based on uniaxial compressive strength-micropore structure relationship：
σc=σ0(1-n)a(1-n≥d)b；
Relevant parameter value is shown in Table 1 in formula, and the uniaxial compressive strength that live paste body filling body is calculated according to formula is
0.74MPa。
1 strength prediction parameter value of table
| Parameter | σ0（kPa） | n | d(μm) | n≥d | a | b |
| Numerical value | 4500 | 43% | 0.3 | 24% | 1.1 | 4.3 |
Finally it should be noted that the above content is merely illustrative of the technical solution of the present invention, rather than to the scope of the present invention
Limitation, those skilled in the art to technical scheme of the present invention carry out it is simple modification or equivalent replacement, not
It is detached from the spirit and scope of technical solution of the present invention.
Claims (4)
1. a kind of cementing paste body filling body strength prediction method of tailings, it is characterised in that：The strength prediction method is first to existing
Field paste body filling body is sampled, and the micropore structure of sample is measured followed by pressure mercury experiment, passes through test site lotion
The micropore structure of material is come then according to the relationship between the uniaxial compressive strength of ointment material and micropore structure
The uniaxial compressive strength value of prediction lotion is calculated, this method is logged well in advance in such a way that field sampling and laboratory test are combined
The intensity of lower scene paste body filling body.
2. a kind of cementing paste body filling body strength prediction method of tailings according to claim 1, it is characterised in that：It is described strong
The estimated process of degree method for predicting specifically comprises the following steps：
A. field sampling：
Core boring sampling is carried out to live paste body filling body, the diameter of drill core is not less than 100mm, and the length of drill core is not less than 100mm；
B. it is dried：
It will materials and do not cut into 1cm by the intact part that drill core is influenced3Blockage, then carry out dehydration and drying processing；
C. pressure mercury porosity test：
It is nitrogen to press the test environment of mercury porosity test, and the rate of heat addition is not higher than 10 DEG C/min, finally obtains the microcosmic of sample
Pore structure Distribution Value；
D. the uniaxial compressive strength of live paste body filling body is calculated by following equation：
σc=σ0(1-n)a(1-n≥d)b。
3. a kind of cementing paste body filling body strength prediction method of tailings according to claim 2, it is characterised in that：Described
In the formula of step d：σcFor the uniaxial compressive strength of live obturation；σ0For reference of the material when perfect condition porosity is 0
Intensity；nFor the overall porosity for the sample that pressure mercury experiment measures；n≥dIt is more than or equal to for aperturedHole cumulative porosity rate；aWithbFor with the relevant constant of material character.
4. a kind of cementing paste body filling body strength prediction method of tailings according to claim 2, it is characterised in that：Described
In step b, the drying process step includes two processes of microwave drying and vacuum drying；The microwave drying process is will to try
Sample is placed in microwave dryer dry 5~10min, and the operating power of microwave dryer is not less than 800W, microwave dryer
Working frequency is 2.45GHz；The process of vacuum drying is that sample is placed in 35 DEG C of vacuum drying oven to be dried, directly
To constant weight.
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| CN201711313074.0A CN108318395B (en) | 2017-12-12 | 2017-12-12 | Method for predicting strength of tailing cemented paste filling body |
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| CN201711313074.0A CN108318395B (en) | 2017-12-12 | 2017-12-12 | Method for predicting strength of tailing cemented paste filling body |
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| CN108318395B CN108318395B (en) | 2020-06-02 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08217561A (en) * | 1995-02-13 | 1996-08-27 | Chichibu Onoda Cement Corp | Light-weight calcium silicate formed body and its production |
| US20020192828A1 (en) * | 2001-04-27 | 2002-12-19 | Swenson Lasalle R. | Adsorptive method for determining a surface property of a solid |
| CN104345216A (en) * | 2014-10-29 | 2015-02-11 | 中国建筑材料科学研究总院 | Method and device for measuring specific resistance and 28-day strength of cement |
| CN105699432A (en) * | 2016-01-13 | 2016-06-22 | 太原理工大学 | Paste filling effect evaluating method |
| CN105859197A (en) * | 2016-03-29 | 2016-08-17 | 中国地质大学（武汉） | Cemented filling material for mine and preparation method thereof |
| CN107918712A (en) * | 2017-11-28 | 2018-04-17 | 玉溪矿业有限公司 | The construction method of two step open stope afterwards filling large volume strength of filling mass models |
-
2017
- 2017-12-12 CN CN201711313074.0A patent/CN108318395B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08217561A (en) * | 1995-02-13 | 1996-08-27 | Chichibu Onoda Cement Corp | Light-weight calcium silicate formed body and its production |
| US20020192828A1 (en) * | 2001-04-27 | 2002-12-19 | Swenson Lasalle R. | Adsorptive method for determining a surface property of a solid |
| CN104345216A (en) * | 2014-10-29 | 2015-02-11 | 中国建筑材料科学研究总院 | Method and device for measuring specific resistance and 28-day strength of cement |
| CN105699432A (en) * | 2016-01-13 | 2016-06-22 | 太原理工大学 | Paste filling effect evaluating method |
| CN105859197A (en) * | 2016-03-29 | 2016-08-17 | 中国地质大学（武汉） | Cemented filling material for mine and preparation method thereof |
| CN107918712A (en) * | 2017-11-28 | 2018-04-17 | 玉溪矿业有限公司 | The construction method of two step open stope afterwards filling large volume strength of filling mass models |
Non-Patent Citations (2)
| Title |
|---|
| 彭军芝等: "加气混凝土的结构与性能研究进展", 《材料导报》 * |
| 徐文彬等: "全尾砂固结体固结过程孔隙与强度特性实验研究", 《中国矿业大学学报》 * |
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