CN107300504B - A kind of Desending slicing admission passage filling body intensity on-the-spot test method - Google Patents
A kind of Desending slicing admission passage filling body intensity on-the-spot test method Download PDFInfo
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- CN107300504B CN107300504B CN201710463406.7A CN201710463406A CN107300504B CN 107300504 B CN107300504 B CN 107300504B CN 201710463406 A CN201710463406 A CN 201710463406A CN 107300504 B CN107300504 B CN 107300504B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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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
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0266—Cylindrical specimens
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Abstract
The invention discloses a kind of Desending slicing admission passage filling body strength test method, this method is sampled design and water drilling sample in the obturation lateral wall that two step stooping pillarings are exposed；Admission passage filling body cube strength is obtained by the relationship for two kinds of intensity of test block of cylindrical body and cube that laboratory test is established according to the cylindrical body intensity of test block that field sampling obtains；Its intensity and obturation design strength are compared, live strength of filling mass safety index is provided.The strength of filling mass safety index that the multiple sample position obtained are finally helped according to admission passage filling body two, draws out the safety index isopleth of whole obturation route, evaluates the stability and prediction obturation catastrophe unstability risk of admission passage filling body.Desending slicing admission passage filling body intensity on-the-spot test method of the invention, can be for mining provides a kind of strength test and Safety Evaluation Technology safely under obturation top plate, thus to the production of admission passage filling body method mining safety and risk profile ability under improving.
Description
Technical field
The invention belongs to Cut-and-fill Mining Technology fields, and in particular to a kind of Desending slicing admission passage filling cemented fill intensity
On-the-spot test method.
Background technique
Filling method mining is that the wastes such as waste residue, barren rock, tailings, waste water are backfilling into underground mining stope, can control stope
Ground pressure and surface subsidence；Waste discharge is also reduced simultaneously, protects environment.Therefore filling method mining is that green mining must be by it
Road is the developing direction of Future development and utilization.Desending slicing route type filling mining method is mainly used for ore-rock built on the sand
The orebody mining of condition, the mining in the case where consolidated fill route forms hand packing body top plate.Therefore, admission passage filling body intensity
Mining safety production is directly related to stability.
Engineering practice shows cemented fill intensity and filling aggregate size grading, cement mortar rate, filling slurry concentration, stirs
It is closely related to mix technique, mobility, bleeding rate and conveying technique.Since filling slurry proportion, stirring and conveying technique are by all
More artificial and engineering factors influence so that material mixture ratio, slurry stir and pipeline in there are many uncertain factors,
Cemented fill intensity is not only reduced, but also also results in obturation structural inhomogeneity.Thus the mining under obturation is given
Bring security risk.Field sampling, strength test and the evaluation of obturation overall stability are carried out to admission passage filling body intensity, it is right
It is very necessary in taking safety and prevention and control measure in time.
Summary of the invention
The potential Safety production questions of mining, this hair under obturation top plate are faced for the mining of above-mentioned stratified filling method
It is bright to provide a kind of Desending slicing admission passage filling body intensity on-the-spot test method, admission passage filling body is able to carry out using this method
Field sampling and strength test obtain route cemented fill and refer in the cemented fill intensity of different location and different larval instar
Mark carries out cemented fill Strength Safety subregion by route cemented fill design strength, realizes and pacifies to admission passage filling body
Full evaluation and risk profile adopt the safe and efficient and green cut and fill in mineral deposit built on the sand for complicated difficult and provide a kind of safety survey
Method for testing.
Above-mentioned purpose is achieved through the following technical solutions:
A kind of Desending slicing admission passage filling body intensity on-the-spot test method, which is characterized in that method includes the following steps:
(1) mining of Desending slicing Drift-and-fill is carried out to mineral deposit, after filling three days, exploits mineral building, two according to a step
The principle of stooping pillaring is walked, two lateral wall of admission passage filling body disclosed by two step stooping pillarings chooses N number of sample point, uses concrete
Core boring sampling machine carries out field sampling: the rhinestone head that diameter is 102mm, length is 380mm is mounted on the concrete drill core
On sampler, is crept on earth on the sample point with the revolving speed no more than 50r/min, extract drill bit afterwards, be with diameter
112mm, the drill bit that length is 380mm carry out reaming, finally prize disconnected core using the reinforcing rod of Ф 12mm and obtain sample, the sample
The size of product is the cylindrical body of Φ 100mm × 380mm；
(2) according to the formula of the admission passage filling body, carry out ratio of height to diameter under the conditions of standard curing respectively in laboratory
For 1 cylindrical body test block and the compressive strength test of standard cube test block, establish between cylindrical body test block and test cube
Intensity conversion relationship；
(3) N group, every group 3 pieces of Φ 100mm × 100mm cylindrical body test block sample will be obtained after the sample cutting in step (1)
Product carry out intensity test to every group of cylindrical body coupon sample, take the mean value of test result as this group of cylindrical body test block sample
The 3d compression strength of product obtains N number of 3d compression strength value altogether；
(4) after filling seven days, N number of sample point is in addition chosen near the sample point of step (1), according to the side of step (1)
Method is sampled, and is carried out 7d intensity test according to the method for step (3), is obtained N number of 7d compression strength value altogether；
(5) after filling 28 days, N number of sample point is in addition chosen near the sample point of step (1) and step (4), is pressed
It is sampled according to the method for step (1), carries out 28d intensity test according to the method for step (3), obtain N number of 28d resistance to compression altogether
Intensity value；
(6) according between the cylindrical body test block and test cube of step (2) intensity conversion relationship and step (3),
(4), 3d, 7d, 28d compression strength of the cylindrical body coupon sample of (5) calculates the equivalent test cube of admission passage filling body
3d, 7d, 28d compression strength；
(7) admission passage filling body Strength Safety index is calculated, the admission passage filling body Strength Safety index is that the route fills
Fill out 3d, 7d, 28d compression strength of the equivalent test cube of body and corresponding admission passage filling body design strength [R3d]、[R7d]、[R28d]
Ratio；
(8) according to the position of step (1) described sample point and step (5) the admission passage filling body Strength Safety index, divide
It Hui Zhi not admission passage filling body 3d, 7d, 28d Strength Safety index isopleth.
Beneficial effects of the present invention:
Desending slicing admission passage filling body intensity on-the-spot test method of the invention, can obtain admission passage filling body in different positions
Set with the strength of filling mass of different larval instar and stability safety index, thus evaluate admission passage filling body intensity distribution feature；According to
Slice drift filling method mining obturation design strength index evaluates admission passage filling body overall stability and destroys risk, with
Just safety and prevention and control measure are taken, mining accident is avoided to occur, to improve the reliability of uneasily mining orebody filling method mining.
Detailed description of the invention
Fig. 1 is that the Desending slicing admission passage filling method of embodiment exploits " one stop panel " process for stoping schematic diagram.
Fig. 2 is the route cemented fill lateral wall sample position design drawing of embodiment.
Fig. 3 is the A-A cross-sectional view of Fig. 2.
Fig. 4 is the schematic diagram of admission passage filling body sampling.
Fig. 5 is the scene photo of embodiment sampling.
Fig. 6 is the scene photo of embodiment sampling.
Fig. 7 is the strength relationship curve between the cuboid sample and cylindrical specimens of embodiment.
Fig. 8 is the cemented fill 3d Strength Safety index isogram of Fig. 2.
Fig. 9 is the cemented fill 7d Strength Safety index isogram of Fig. 2.
Figure 10 is the cemented fill 28d Strength Safety index isogram of Fig. 2.
Specific embodiment
Desending slicing admission passage filling body intensity on-the-spot test method of the invention the following steps are included:
(1) for Desending slicing Drift-and-fill mining " one stop panel " process for stoping, filling three days after, into
Two lateral wall of admission passage filling body that two step stooping pillaring of row is exposed, chooses several sample points, the number of sample point be it is N number of, point
It Cai Yong not the progress admission passage filling embodiment field test block sampling of concrete drill core sampling machine.The specific steps of sampling are as follows: be by diameter
102mm, the rhinestone head that length is 380mm are mounted on the concrete drill core sampling machine, are existed with the revolving speed no more than 50r/min
It is crept on the sample point on earth, extracts drill bit afterwards, carry out reaming with the drill bit that diameter is 112mm, length is 380mm, finally
Disconnected core is prized using the reinforcing rod of Ф 12mm and obtains sample, and the size of the sample is the cylindrical body of Φ 100mm × 380mm.
(2) according to admission passage filling body formula, according to Test method for strength of hydraulic cement mortar (GB/T17671- in laboratory
1999) cylindrical body test block and test cube are made respectively, is then conserved at the standard conditions, are tested two kinds using press machine and are filled
Fill out 3d, 7d, 28d cemented fill compression strength of body test block；Statistical regression analysis method is finally used, cylindrical body is established and is stood
Conversion relation between two kinds of test block cemented fill intensity of cube.
(3) N group, every group 3 pieces of Φ 100mm × 100mm cylindrical body test block sample will be obtained after the sample cutting in step (1)
Product carry out uniaxial compressive strength test to every group of cylindrical body coupon sample, the mean value of test result are taken to try as this group of cylindrical body
The compression strength of block sample obtains N number of compression strength value altogether.
(4) after filling seven days, N number of sample point is in addition chosen near the sample point of step (1), according to the side of step (1)
Method is sampled, and is carried out 7d intensity test according to the method for step (3), is obtained N number of 7d compression strength value altogether.
(5) after filling 28 days, N number of sample point is in addition chosen near the sample point of step (1) and step (4), is pressed
It is sampled according to the method for step (1), carries out 28d intensity test according to the method for step (3), obtain N number of 28d resistance to compression altogether
Intensity value.
(6) according between the cylindrical body test block and test cube of step (2) intensity conversion relationship and step (3),
(4), 3d, 7d, 28d compression strength of the cylindrical body coupon sample of (5) calculates the equivalent test cube of admission passage filling body
3d, 7d, 28d compression strength；
(7) admission passage filling body Strength Safety index is calculated, the admission passage filling body Strength Safety index is that the route fills
Fill out 3d, 7d, 28d compression strength of the equivalent test cube of body and corresponding admission passage filling body design strength [R3d]、[R7d]、[R28d]
Ratio.
(8) according to the position of step (1) described sample point and step (5) the admission passage filling body Strength Safety index, divide
It Hui Zhi not admission passage filling body 3d, 7d, 28d Strength Safety index isopleth.
Explanation is further explained to the present invention with specific embodiment below.
Embodiment
In order to illustrate Desending slicing admission passage filling body intensity on-the-spot test method, below with reference to Jinchuan Nickel Mine mining with stowing skill
Art parameter further illustrates the implementation steps and evaluation result of the invention.
Step 1: the design of admission passage filling body field sampling.
It is embodied as follows:
(1) for the process for stoping (Fig. 1) of Jinchuan Desending slicing Drift-and-fill mining " one stop panel ", obturation is filled
After filling out three days, two lateral walls of admission passage filling body exposed when carrying out two step stooping pillarings are respectively adopted concrete core and take
Sample device carries out admission passage filling body two and live test block is helped to sample.
The laying of obturation sample point is carried out according to admission passage filling body size (length × height=50m × 5m).Such as Fig. 2 institute
Show, arranges that sampling section, each section are sampled along short transverse according to the interval 1m according to 10m spacing in length direction, Mei Gechong
It fills out side side and obtains 4 × 4=16 cylindrical body obturation sample；Two lateral walls take 32 cylindrical body obturation samples altogether.
It is sampled and is designed according to route consolidated fill, concrete drill core sampling machine is selected to carry out field sampling.As Fig. 4-6 institute
Show, selecting diameter for 102mm, length is that 380mm rhinestone head is mounted on model K21-118D engineering driller, using being not more than
The revolving speed drilling of 50r/min on earth, then extracts drill bit and uses the drill bit progress reaming that diameter is 112mm, length is 380mm instead,
Finally go deep into free space with the reinforcing rod of Ф 12mm again and prizes disconnected core sampling, cylinder of the coring having a size of Φ 100mm × 380mm
Body.
(2) according to obturation formula, according to Test method for strength of hydraulic cement mortar (GB/T17671-1999) in laboratory
The test block of Φ 100mm × 100mm cylindrical body and 70.7mm × 70.7mm × 70.7mm test cube are made respectively, then in standard
Under the conditions of conserve, using press machine test two kinds of obturation test blocks 3d, 7d, 28d cemented fill compression strength.
As shown in fig. 7, according to the compression strength value of cube and cylindrical body, cube and cylindrical compressive strength are drawn
Relation curve is established between two kinds of test block cemented fill intensity of cylindrical body and cube using statistical regression analysis method
Conversion relation are as follows: cuboid sample compression strength=a+b × cylindrical body test block pressure resistance intensity, MPa；Wherein, a and b is two kinds of shapes
The compression strength regression coefficient of shape test block.
(3) Φ 100mm × 380mm cylindrical specimens are obtained according to step 2 admission passage filling body field sampling, be cut to
Every group of 3 pieces of totally 32 groups of Φ 100mm × 100mm cylinder test blocks；Then strong using the uniaxial compressive of press machine test cylinder test block
Degree, takes the average value of 3 test block pressure resistance intensities as the compression strength of cylindrical body test block.Thus to obtain two lateral wall of admission passage filling body
The cylindrical body 3d strength of filling mass value of sample position amounts to 32:
(4) after filling seven days, 32 sample points are in addition chosen near the sample point of step (1), according to the side of step (1)
Method is sampled, and is carried out 7d intensity test according to the method for step (3), is obtained 32 7d compression strength values altogether:
(5) after filling 28 days, 32 sample points are in addition chosen near the sample point of step (1) and step (4), are pressed
It is sampled according to the method for step (1), carries out 28d intensity test according to the method for step (3), it is anti-to obtain 32 28d altogether
Pressure angle value:
(6) according between the cylindrical body test block and test cube of step (2) intensity conversion relationship and step (3),
(4), 3d, 7d, 28d compression strength of the cylindrical body coupon sample of (5)It calculates
3d, 7d, 28d compression strength of the equivalent test cube of admission passage filling body out:
(7) admission passage filling body cube strength value is obtained according to step 6: With
Jinchuan Desending slicing admission passage filling method mining obturation design strength [R3d]=1.5MPa, [R7d]=2.5MPa, [R28d]=
5MPa comparison, thereby determines that each sample point Strength Safety index of admission passage filling body are as follows:
(8) sampling design and step 7 is helped to obtain cemented fill Strength Safety index according to step 1 admission passage filling body two,
It draws admission passage filling body 3d, 7d and 28d Strength Safety index isogram (Fig. 8~Figure 10).Thus it is strong to carry out admission passage filling body
Spend safety analysis and unstability risk assessment.
Claims (1)
1. a kind of Desending slicing admission passage filling body intensity on-the-spot test method, which is characterized in that method includes the following steps:
(1) mining of Desending slicing Drift-and-fill is carried out to mineral deposit, after filling three days, is returned according to step exploitation mineral building, two steps
The principle of mining column, two lateral wall of admission passage filling body disclosed by two step stooping pillarings chooses N number of sample point, with concrete drill core
Sampler carries out field sampling: the rhinestone head that diameter is 102mm, length is 380mm is mounted on the concrete drill core sampling
It on machine, is crept on earth on the sample point with no more than the revolving speed of 50r/min, extracts drill bit afterwards, with diameter be 112mm, length
The drill bit that degree is 380mm carries out reaming, finally prizes disconnected core using the reinforcing rod of Ф 12mm and obtains sample, the size of the sample
For the cylindrical body of Φ 100mm × 380mm；
(2) according to the formula of the admission passage filling body, carrying out ratio of height to diameter under the conditions of standard curing respectively in laboratory is 1
The intensity between cylindrical body test block and test cube is established in the compressive strength test of cylindrical body test block and standard cube test block
Conversion relation；
(3) N group, every group 3 pieces of Φ 100mm × 100mm cylindrical body coupon sample will be obtained after the sample cutting in step (1),
Intensity test is carried out to every group of cylindrical body coupon sample, takes the mean value of test result as this group of cylindrical body coupon sample
3d compression strength obtains N number of 3d compression strength value altogether；
(4) fill seven days after, N number of sample point is in addition chosen near the sample point of step (1), according to step (1) method into
Row sampling carries out 7d intensity test according to the method for step (3), obtains N number of 7d compression strength value altogether；
(5) after filling 28 days, N number of sample point is in addition chosen near the sample point of step (1) and step (4), according to step
Suddenly the method for (1) is sampled, and is carried out 28d intensity test according to the method for step (3), is obtained N number of 28d compression strength altogether
Value；
(6) according between the cylindrical body test block and test cube of step (2) intensity conversion relationship and step (3), (4),
(5) 3d, 7d, 28d compression strength of cylindrical body coupon sample, calculate the equivalent test cube of admission passage filling body 3d, 7d,
28d compression strength；
(7) admission passage filling body Strength Safety index is calculated, the admission passage filling body Strength Safety index is the admission passage filling body
3d, 7d, 28d compression strength of equivalent test cube and corresponding admission passage filling body design strength R3d、R7d、R28dRatio；
(8) it according to the position of step (1) described sample point and step (7) the admission passage filling body Strength Safety index, draws respectively
Admission passage filling body 3d, 7d, 28d Strength Safety index isopleth processed.
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| CN110878695B (en) * | 2019-11-19 | 2022-05-31 | 铜陵有色金属集团股份有限公司 | Stope structure arrangement method suitable for continuous multi-step stoping |
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| CN103884534B (en) * | 2014-04-09 | 2016-02-17 | 韩思愉 | A kind of obturation underground site sampler |
| CN105973636A (en) * | 2016-04-28 | 2016-09-28 | 长春黄金研究院 | Nondestructive sampling method of cemented filling body |
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