CN109253931A - A kind of shale water barrier adopts the method for discrimination of dynamic stability - Google Patents
A kind of shale water barrier adopts the method for discrimination of dynamic stability Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 183
- 230000004888 barrier function Effects 0.000 title claims abstract description 139
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000011435 rock Substances 0.000 claims abstract description 40
- 230000035699 permeability Effects 0.000 claims abstract description 14
- 238000005259 measurement Methods 0.000 claims abstract description 13
- 238000005065 mining Methods 0.000 claims description 18
- 238000012360 testing method Methods 0.000 claims description 18
- 238000005070 sampling Methods 0.000 claims description 9
- 238000011065 in-situ storage Methods 0.000 claims description 8
- 230000008595 infiltration Effects 0.000 claims description 6
- 238000001764 infiltration Methods 0.000 claims description 6
- 238000005553 drilling Methods 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 230000035515 penetration Effects 0.000 claims description 2
- 239000002734 clay mineral Substances 0.000 abstract description 5
- 230000001066 destructive effect Effects 0.000 abstract description 2
- 239000003245 coal Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000011160 research Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 230000004069 differentiation Effects 0.000 description 3
- 238000009738 saturating Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 208000036119 Frailty Diseases 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 206010003549 asthenia Diseases 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910052900 illite Inorganic materials 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- VGIBGUSAECPPNB-UHFFFAOYSA-L nonaaluminum;magnesium;tripotassium;1,3-dioxido-2,4,5-trioxa-1,3-disilabicyclo[1.1.1]pentane;iron(2+);oxygen(2-);fluoride;hydroxide Chemical compound [OH-].[O-2].[O-2].[O-2].[O-2].[O-2].[F-].[Mg+2].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[K+].[K+].[K+].[Fe+2].O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2 VGIBGUSAECPPNB-UHFFFAOYSA-L 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 210000005239 tubule Anatomy 0.000 description 1
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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
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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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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- 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
- G01N2203/0025—Shearing
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Abstract
The invention discloses the method for discrimination that a kind of shale water barrier adopts dynamic stability, specific judgment steps are as follows: (1) determines the target aquifer water pressure H in current mineaf: water barrier minimum adopts waterpower barrier thickness h after (2) prediction is adoptedad: the practical pressure drag ratio i of (3) calculating water barrierad: the shear strength σ of (4) measurement water barrier rock masss: the initial porosity n of (5) measurement water barrier rock mass0: (6) measure water barrier original permeability k0: (7) calculate the critical pressure drag ratio i that seepage failure occurs for current water barrier；(8) step (3) is compared with the data of step (7)；Finally judge the water proof stability after current shale water barrier is adopted.The present invention considers that shale water barrier adopts the hydrophysical properties of dynamic deformation destructive characteristics and clay mineral water-swellable argillization, by pressure drag than as the key index for differentiating water barrier seepage failure, is effectively predicted and is differentiated so as to adopt dynamic stability to shale water barrier.
Description
Technical field
The present invention relates to a kind of method of discrimination of water barrier stability, specifically a kind of shale water barrier adopts dynamic stability
Method of discrimination.
Background technique
Northwest China portion coalfield coal seam buries that shallow, thickness is big, basement rock is thin, coal quality is excellent and simple structure at present, exploits skill
Art is with favourable conditions.The large scale mining of coal develops overlying strata mining induced fissure largely and usually leads directly to earth's surface, often results in earth's surface
Water or underground latent water are lost, and destroy rainwash.On the other hand, northwestern is arid and semi-arid weather, and precipitation is small, steams
Hair amount is big, ecological environment frailty, and especially surface water and underground latent water are even more to maintain local area ecological stabilization and guarantee production and living
Valuable source.For a long time, the contradiction between the large scale mining and fragile ecological environment of northwestward coal is extremely sharp.With
Technology development, the water-retaining production based on water barrier protection, which becomes, solves one of above-mentioned contradictory effective ways, and opens in water conservation
It adopts in research, water barrier stability is effectively predicted and differentiates one of the important content as research.Meanwhile research data table
Bright, northwest China portion area water barrier is rich in the clay minerals such as montmorillonite, illite, kaolin more, makes it have good chance
Water expands argillization characteristic, and therefore, research shale water barrier adopts dynamic stability criterion and realizes that water-retaining production is significant to this area.
It is anti-that the criterion for adopting dynamic stability to water barrier at present mainly passes through analysis water flowing fractured zone development height, the overlying strata limit
Tensile strength, water-resisting key strata strength condition etc. carry out the stability of indirect predictions water barrier.Such as Publication No. CN104564074A, name
The referred to as Chinese patent of " a method of realize coal field water protection mining ", by calculating height of water flowing fractured zone, give every
Water layer water proof stability criteria, i.e. H >=HIt splits+40.Wherein H is the depth of stratum that boundary to water-bearing layer lower bound is pushed up in coal seam, HIt splitsFor water guide
Fissure zone height, 40 be water barrier residual thickness (unit m)；Publication No. CN104612688A, a kind of entitled " ecology fragility
The Chinese patent of area's mutil-coal seam mining water-protection coal-mining method " is exploited water flowing fractured zone development height by calculating different coal, is given
Each seam mining sequence under the conditions of multiple seam water-retaining production is gone out；Publication No. CN102505943A, a kind of entitled " water head site
The Chinese patent of medium and small colliery water-protection coal-mining method " is based on Elastic simply-supported beam model, calculates under the top to water barrier of coal seam
The compressive ultimate strength of portion's overlying strata gives the strip width upper limit of band water protection miningPublication No.
CN1963148A, the Chinese patent of entitled " using structural key layer as the water-protection coal-mining method of water barrier ", based on key
Shelf theory, calculates the intensity and rigidity condition of water-resisting key strata differentiation, and points out by ensuring that water barrier key stratum is not broken
Badly to realize water-retaining production.Above-mentioned each patent of invention passes through indirect analysis method, gives and predicts water barrier under certain condition
The method formula of stability, but generally existing following insufficient:
1. being all by analyzing water flowing fractured zone development height, overlying strata ultimate tensile strength, water-resisting key strata intensity at present
Condition etc. carrys out the stability of indirect predictions water barrier, has ignored water barrier (especially shale water barrier) self-regeneration and keeps certainly
The stable ability of body, error is larger between prediction result and actual value；
2. mostly is to be caving destruction from overlying strata itself, shale water barrier CLAY MINERALS AND THEIR SIGNIFICANCE ingredient is had ignored in solid-liquid coupling
Under the conditions of water-swellable argillization water manage characteristic.
Summary of the invention
In view of the above existing problems in the prior art, the present invention provides the differentiation sides that a kind of shale water barrier adopts dynamic stability
Method considers that shale water barrier adopts the hydrophysical property of dynamic deformation destructive characteristics and clay mineral water-swellable argillization, pressure drag is compared to
For the key index for differentiating water barrier seepage failure, it is effectively predicted and is sentenced so as to adopt dynamic stability to shale water barrier
Not.
To achieve the goals above, the technical solution adopted by the present invention is that: a kind of shale water barrier adopts sentencing for dynamic stability
Other method, specific discriminating step are as follows:
(1) the target aquifer water pressure H in current mine is determinedaf: according to current mine or close on mine hydrogeology money
Material, determines the target aquifer water pressure H in current mineaf；
(2) water barrier minimum adopts waterpower barrier thickness h after prediction is adoptedad: according to current mine mining face water proof
Layer step convergence coefficients statistics value qmWith the overall thickness h of water barrier, predict that spot book purchase face adopts rear water barrier minimum and adopts water
Mechanical resistance is every thickness had=h (1-qm)；
(3) the practical pressure drag ratio i of water barrier is calculatedad: the numerical value that the numerical value and step (2) obtained according to step (1) obtains,
Target aquifer water pressure H is calculatedafWaterpower barrier thickness h is adopted with rear water barrier minimum is adoptedadThe ratio between, i.e. water barrier
Practical pressure drag ratio iad；Specific formula are as follows:
In formula, HafFor target aquifer water pressure, m；hadWaterpower, which is adopted, for water barrier minimum obstructs thickness, m；
(4) the shear strength σ of water barrier rock mass is measureds: using the equipment of measurement rock mass shear strength to water barrier rock mass
Intensity carries out live in-situ test, obtains the shear strength σ of water barrier rock masss；
(5) the initial porosity n of water barrier rock mass is measured0: to water barrier rock mass carry out field sampling, then to sample into
Row porosity measurement obtains the initial porosity n of water barrier rock mass0；
(6) water barrier original permeability k is measured0: the water barrier rock sample obtained according to scene is seeped in laboratory processing and fabricating
Saturating rate testing standard sample, and using the infiltration coefficient of penetration testing instrument test sample, and then obtain water barrier original permeability k0；
(7) the critical pressure drag ratio i: the formula proving of critical pressure drag ratio i that seepage failure occurs for current water barrier is calculated
It is as follows, according to law, capillary seepage model and mass conservation law in general happy tin, define dimensionless variable:
In formula:δ is equivalent pore radius, m；δ0For initial hair
Tubule radius, m；q0For initial flow；n0For initial porosity；L is block length, m；αiFor the change of the seepage flow rate of i-th of block
Change rate；CsFor clay content in ground；A is cross-sectional area in permeation pathway, m2；τcFor critical shearing stress, Pa；
Work as NFD-NG> 0, i.e., when aperture diameter continues to increase at any time, leakage, therefore, water proof will takes place in water barrier
Layer occur seepage failure critical condition be are as follows:
NFD-NG=0 (II)
According to Darcy's law:
In formula: I is that target aquifer water pressure and water barrier adopt waterpower and obstruct the ratio between thickness, Pa/m.
Simultaneous above-mentioned formula (I), (II), (III) solve, that is, determine that water barrier occurs the critical pressure drag ratio i's of seepage failure
Calculation formula:
In formula, n0For initial porosity；k0For original permeability, m2；σsFor water barrier rock mass shear strength, Pa；By step
(4), each water barrier rock mass parameter that step (5), step (6) obtain is brought into above-mentioned formula, and current water proof is calculated
The critical pressure drag ratio i of seepage failure occurs for layer；
(8) judge the stability after shale water barrier is adopted: the practical pressure drag ratio i for the water barrier that step (3) is obtainedadWith
The critical pressure drag ratio i that seepage failure occurs for the current water barrier that step (7) obtains is compared；If iad< i then judges current mud
Matter water barrier is able to maintain water proof stability after adopting；If iad>=i then judges leakage can occur after current shale water barrier is adopted broken
It is bad.
Further, the equipment of the measurement rock mass shear strength is to automatically control pressure instrument and Test in Situ drilling by high pressure to cut
Cut tester or Menard pressuremeter.Rock mass shear strength can easily and accurately be measured using above-mentioned existing equipment.
Further, described that porosity measurement is carried out to sampling in the lab.Measurement, which can reduce, in the lab measured
Its interference of journey China and foreign countries bound pair, to guarantee the accuracy of porosity measurement.
Compared with prior art, the present invention not only accurately reflects using shale water barrier itself water-resisting property as research object
Deformation failure of the mining active process to shale water barrier, and fully considered that the process CLAY MINERALS AND THEIR SIGNIFICANCE acts on lower water barrier and meets
The hydrophysical property of water expansion argillization；By pressure drag than the key index as differentiation water barrier seepage failure, after obtaining mining influence
The critical judgment mode of seepage failure occurs for shale water barrier, and gives the detailed discriminating step that water barrier adopts dynamic stability,
Being effectively predicted and differentiating for dynamic stability is adopted to shale water barrier to realize, convenient for being made extensively in practical projects
With.
Detailed description of the invention
Fig. 1 is decision flow chart of the invention.
Specific embodiment
The invention will be further described below.
Embodiment 1:
By taking the real work face seam mining of mine A as an example, the specific steps of stability are judged using the present invention are as follows:
(1) according to current mine or mine hydrogeology data is closed on, determines the target aquifer water pressure in current mine
HafFor 9.10m；
(2) according to current mine mining face water barrier step convergence coefficients statistics value qmIt is 0.32, it is comprehensive consults mine
Histogram is closed, the overall thickness h for obtaining water barrier is 3.55m, and water barrier minimum adopts waterpower resistance after prediction spot book purchase face is adopted
Every thickness had=h (1-qm), show that water barrier minimum adopts waterpower barrier thickness hadFor 2.41m；
(3) numerical value that the numerical value and step (2) obtained according to step (1) obtains, is calculated target aquifer water pressure Haf
Waterpower barrier thickness h is adopted with rear water barrier minimum is adoptedadThe ratio between, i.e. the practical pressure drag ratio i of water barrieradIt is 3.78；It is specific public
Formula are as follows:
In formula, HafFor target aquifer water pressure, m；hadWaterpower, which is adopted, for water barrier minimum obstructs thickness, m；
(4) water barrier rock mass strength is carried out using pressure instrument by automatic control high pressure and Test in Situ drilling shear tester
Live in-situ test obtains the shear strength σ of water barrier rock masssFor 0.35MPa；
(5) to water barrier rock mass carry out field sampling, then in the lab to sampling carry out porosity measurement, obtain every
The initial porosity n of water layer rock mass0It is 0.1；
(6) the water barrier rock sample obtained according to scene, in laboratory processing and fabricating permeability testing standard sample, and using infiltration
The infiltration coefficient of saturating tester test sample, and then obtain water barrier original permeability k0For 0.01m/d；
(7) calculation formula of critical pressure drag ratio i is as follows,
In formula, n0For initial porosity；k0For original permeability, m2；σsFor water barrier rock mass shear strength, Pa；By step
(4), each water barrier rock mass parameter that step (5), step (6) obtain is brought into above-mentioned formula, and current water proof is calculated
The critical pressure drag ratio i that seepage failure occurs for layer is 0.61；
(8) the practical pressure drag ratio i for the water barrier for obtaining step (3)adThe current water barrier obtained with step (7) seeps
The critical pressure drag ratio i that leakage destroys is compared；Due to iad>=i then judges that current shale water barrier can leak after adopting
It destroys.It then proceedes to adopt mine A, and the scene mine A water level is monitored, monitoring result shows that working face pushes away
Later, drilling internal water accumulation is lost, and shows that seepage failure has occurred in water barrier, water-stop structure is destroyed.This is obtained with the present invention
Judging result be consistent completely, show the accuracy of the method for discrimination.
Embodiment 2:
By taking the real work face seam mining of mine B as an example, the specific steps of stability are judged using the present invention are as follows:
(1) according to current mine or mine hydrogeology data is closed on, determines the target aquifer water pressure in current mine
HafFor 9.10m；
(2) according to current mine mining face water barrier step convergence coefficients statistics value qmIt is 0.32, it is comprehensive consults mine
Histogram is closed, the overall thickness h for obtaining water barrier is 6.42m, and water barrier minimum adopts waterpower resistance after prediction spot book purchase face is adopted
Every thickness had=h (1-qm), show that water barrier minimum adopts waterpower barrier thickness hadFor 4.37m；
(3) numerical value that the numerical value and step (2) obtained according to step (1) obtains, is calculated target aquifer water pressure Haf
Waterpower barrier thickness h is adopted with rear water barrier minimum is adoptedadThe ratio between, i.e. the practical pressure drag ratio i of water barrieradIt is 2.08；It is specific public
Formula are as follows:
In formula, HafFor target aquifer water pressure, m；hadWaterpower, which is adopted, for water barrier minimum obstructs thickness, m；
(4) water barrier rock mass strength is carried out using pressure instrument by automatic control high pressure and Test in Situ drilling shear tester
Live in-situ test obtains the shear strength σ of water barrier rock masssFor 1.44MPa；
(5) to water barrier rock mass carry out field sampling, then in the lab to sampling carry out porosity measurement, obtain every
The initial porosity n of water layer rock mass0It is 0.1；
(6) the water barrier rock sample obtained according to scene, in laboratory processing and fabricating permeability testing standard sample, and using infiltration
The infiltration coefficient of saturating tester test sample, and then obtain water barrier original permeability k0For 0.01m/d；
(7) calculation formula of critical pressure drag ratio i is as follows,
In formula, n0For initial porosity；k0For original permeability, m2；σsFor water barrier rock mass shear strength, Pa；By step
(4), each water barrier rock mass parameter that step (5), step (6) obtain is brought into above-mentioned formula, and current water proof is calculated
The critical pressure drag ratio i that seepage failure occurs for layer is 2.50；
(8) the practical pressure drag ratio i for the water barrier for obtaining step (3)adThe current water barrier obtained with step (7) seeps
The critical pressure drag ratio i that leakage destroys is compared；Due to iad< i, then current shale water barrier is able to maintain water proof stability after adopting.
It then proceedes to adopt mine B, and the scene mine B water level is monitored, after monitoring result shows that working face pushes through,
It is basicly stable to bore water level in borehole, shows that water-stop structure is not destroyed, water barrier, which maintains, adopts water-resisting property.This is obtained with the present invention
Judging result be consistent completely, show the accuracy of the method for discrimination.
Claims (3)
1. the method for discrimination that a kind of shale water barrier adopts dynamic stability, which is characterized in that specific discriminating step are as follows:
(1) the target aquifer water pressure H in current mine is determinedaf: according to current mine or mine hydrogeology data is closed on, really
Determine the target aquifer water pressure H in current mineaf；
(2) water barrier minimum adopts waterpower barrier thickness h after prediction is adoptedad: according to current mine mining face water barrier platform
Rank subsidence factor statistical value qmWith the overall thickness h of water barrier, predict that spot book purchase face adopts rear water barrier minimum and adopts waterpower resistance
Every thickness had=h (1-qm)；
(3) the practical pressure drag ratio i of water barrier is calculatedad: the numerical value that the numerical value and step (2) obtained according to step (1) obtains calculates
Obtain target aquifer water pressure HafWaterpower barrier thickness h is adopted with rear water barrier minimum is adoptedadThe ratio between, i.e. the reality of water barrier
Pressure drag ratio iad；Specific formula are as follows:
In formula, HafFor target aquifer water pressure, m；hadWaterpower, which is adopted, for water barrier minimum obstructs thickness, m；
(4) the shear strength σ of water barrier rock mass is measureds: using measurement rock mass shear strength equipment to water barrier rock mass strength into
Row scene in-situ test, obtains the shear strength σ of water barrier rock masss；
(5) the initial porosity n of water barrier rock mass is measured0: field sampling is carried out to water barrier rock mass, hole then is carried out to sampling
The measurement of gap rate, obtains the initial porosity n of water barrier rock mass0；
(6) water barrier original permeability k is measured0: the water barrier rock sample obtained according to scene, in laboratory processing and fabricating permeability
Testing standard sample, and using the infiltration coefficient of penetration testing instrument test sample, and then obtain water barrier original permeability k0；
(7) calculate the critical pressure drag ratio i that seepage failure occurs for current water barrier: the calculation formula of critical pressure drag ratio i is as follows,
In formula, n0For initial porosity；k0For original permeability, m2；σsFor water barrier rock mass shear strength, Pa；By step (4),
Each water barrier rock mass parameter that step (5), step (6) obtain is brought into above-mentioned formula, and current water barrier hair is calculated
The critical pressure drag ratio i of raw seepage failure；
(8) judge the stability after shale water barrier is adopted: the practical pressure drag ratio i for the water barrier that step (3) is obtainedadWith step
(7) the critical pressure drag ratio i that seepage failure occurs for the current water barrier obtained is compared；If iad< i, then judge current shale every
Water layer is able to maintain water proof stability after adopting；If iad>=i then judges that seepage failure can occur after current shale water barrier is adopted.
2. the method for discrimination that a kind of shale water barrier according to claim 1 adopts dynamic stability, which is characterized in that the survey
The equipment of amount rock mass shear strength is to automatically control pressure instrument and Test in Situ drilling shear tester or Menard pressuremeter by high pressure.
3. the method for discrimination that a kind of shale water barrier according to claim 1 adopts dynamic stability, which is characterized in that it is described
Porosity measurement is carried out to sampling in laboratory.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110119574A (en) * | 2019-05-14 | 2019-08-13 | 中国矿业大学 | A kind of non linear fluid flow through porous medium system stability distinguishing method of filling coal mining water-resisting key strata |
| CN110749533A (en) * | 2019-10-31 | 2020-02-04 | 中国矿业大学 | Water-retention coal mining discrimination method based on equivalent water-resisting layer thickness |
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| 范钢伟: "浅埋煤层开采与脆弱生态保护相互响应机理与工程实践", 《中国博士学位论文全文数据库 工程科技Ⅰ辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110119574A (en) * | 2019-05-14 | 2019-08-13 | 中国矿业大学 | A kind of non linear fluid flow through porous medium system stability distinguishing method of filling coal mining water-resisting key strata |
| CN110749533A (en) * | 2019-10-31 | 2020-02-04 | 中国矿业大学 | Water-retention coal mining discrimination method based on equivalent water-resisting layer thickness |
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