CN104989403B - Method for reconstructing floor limestone aquifer into natural-artificial composite integrated aquiclude - Google Patents
Method for reconstructing floor limestone aquifer into natural-artificial composite integrated aquiclude Download PDFInfo
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Abstract
The invention provides a method for reconstructing a floor limestone aquifer into a natural-artificial composite integrated aquiclude. The method comprises the following steps: carrying out research on prevention and treatment of harm of limestone water in a coal seam floor on a working face and determining a target layer for grouting reinforcement; constructing an end hole along the inclination direction of limestone in the target layer; carrying out advanced detection on the target layer via the position of the constructed end hole and subjecting the target layer to grouting reinforcement and reconstruction; and carrying out comparative study on the water-resisting properties of the layer before and after grouting. According to the invention, since the floor limestone aquifer is reconstructed into a natural-artificial composite integrated key water-resisting layer through grouting reinforcement, the integral strength of floor rock and the critical value of a water bursting coefficient are improved, prevention and treatment of hazards of deep high-confined limestone water are realized, and important guarantee is provided for safe stoping of the working surface.
Description
Technical field
The present invention relates to dig up mine or technical field of quarrying, more particularly to a kind of underground or methods of surface mining.
Background technology
Huainan Mining Area coal seam has 26 layers, divides five groups, is successively from the bottom up A, B, C, D, E group, and A group coals are Huai Nankuang
The nethermost floor group of area's minable coal seam, containing 1 to 2 layer of minable coal seam, tires out thick average about 7 meters, and reserves are up to 17.5 hundred million tons.A groups
For coal opposite upper parts each group coal seam, ature of coal is excellent, and caloric value is high, reaches more than 6000 kilocalories, high compared with other groups, and coal
It is good, be 1/3 coking coal, can be used as coking coal, and this group of coal coal seam is thick, 1,3 coal seams altogether average thickness up to 7 meters.In addition, shallow
Portion's wind-engaging oxidation affects, and part gas has discharged, and gas bearing capacity is relatively low.Because these advantages, A group coals are likened to by people
" the new silo " in mining area.(A) group coal is away from Taiyuan Forma-tion limestone (referred to as too grey) only 18～26m, old area recovery process under Huainan field
In repeatedly there is the prominent watered-out well accident of base plate limestone.Research for many years thinks that too grey epimere (1～4 is grey) is directly filling for 1 coal mining
Water water-bearing layer, wherein 3,4 grey thickness are big and stable, watery is relatively strong；Stage casing (5～11 grey top board) is sandwiched in mud for thin limestone
Between rock, sandstone, it is believed that be relative water resisting layer；Hypomere (11～13 is grey) is deep Ordovician system thick-layer limestone high artesian.Due to
Threatened by the water damage of the high pressure-bearing Karst-fissure water of base plate, (A) group fails always scale exploitation under Huainan field.
Newly collect coal seam under the abundant phoenix nappe of two ore deposits exploitation Huainan field Nan Yuan Shou County old man storehouse tomography north side, herein the hydrology
Engineering geological condition is more complicated.For liberation two ore deposits of new collection and 1 (A groups) coal in adjacent mine and mining area, Guo Touxinji companies are first
Carry out preventing and treating base plate limestone water damage research in the working face of two ore deposit 210108.Jing simulations, actual measurement, 1 coal seam floor of exploitation receives mining influence
Depth about 19.5m, has arrived at the grey top board of Taiyuan Forma-tion 1, to avoid being subject to the too grey ash of epimere 3,4 limestone karst waters and deep limestone
Water imports the threat in pit by buried structure, needs the stratum in the range of the appropriate depth being located to base plate in advance to carry out slip casting and adds
Gu transformation reaches enough safe thicknesses.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of base plate limestone aquifer, and to be transformed into nature manually compound complete
The method of water barrier, by the way that base plate limestone grouting and reinforcing is transformed into into nature-manually complete water-resisting key strata is combined, and improves bottom
The critical value of slate body entire compression intensity and water bursting coefficient, realizes the preventing and treating to the high pressure-bearing limestone water damage in deep, is work
The back production in face has safely provided important leverage.
Base plate limestone aquifer of the present invention is transformed into the method that nature is manually combined complete water barrier, comprises the following steps：
1. carry out preventing and treating seat earth limestone water damage research in exploitation working face, Jing simulations, calculating, site-test analysis determine institute
State Effect of Coal-mining On The Floor collapse dept, and thereby determine that using the too grey ash of epimere 3,4 ashes as grouting and reinforcing target zone；
2. along described 3 ashes, the whole hole of limestone incline direction construction of 4 ashes, along the concordant construction drill of 4 ash, in draining
Ability carries out unrestrained to the described whole hole of water outlet, drilling in the case of allowing；
3. forward probe is carried out to 4 ash using the whole aperture layer position constructed, and using the whole hole, drilling as slip casting
Passage carries out grouting and reinforcing transformation to described 3 ashes, 4 ashes, Geophysical Anomalies area, structure development section to the working face, cuts eye
Position, first weighting position, periodic weighting position and stop adopting near line, emphasis carries out emphasis note using the whole hole, drilling
Slurry strengthening and reforming, wherein, the whole hole, the center line of drilling form acute angle with the rock stratum direction of described 3 ashes, 4 ashes；
4. carry out contrast to the water-resisting property of rock stratum before and after slip casting using the method for physical prospecting, boring coring or water injection test to grind
Study carefully, evaluate slip casting effect,
Above-mentioned steps 1. in, the Effect of Coal-mining On The Floor collapse dept and mining depth direct proportionality, its meter
Calculating formula is：
h1=0.0085H+0.1665 α+0.1079L-4.3579,
Wherein：h1- Effect of Coal-mining On The Floor collapse dept, unit：m；
H-mining depth, unit：m；
α-seam inclination, unit：°；
L-stope width, unit：m.
Base plate limestone aquifer of the present invention is transformed into the method that nature is manually combined complete water barrier, above-mentioned steps 3. in,
The whole hole, drilling adopt method of absolute coordinate system cloth hole pattern, i.e. drilling-machine shifter, take preset angle configuration to position.
Base plate limestone aquifer of the present invention is transformed into the method that nature is manually combined complete water barrier, above-mentioned steps 3. in also
The rock cranny density of described 3 ashes, 4 ashes need to be analyzed, study the Permeability of rock and mobility status of many crack compositions, and
Tested by injecting paste material, select suitable injecting paste material, and while determine grouting amount, final grouting pressure, the ratio of mud, dilation angle
And drill hole density, concrete steps include：
(31) before formal slip casting, different types of slurries are selected, in the base plate of the working face associated field test are carried out,
Six groups of concentration of each slurries type point, carry out grouting test in six groups of different described whole holes, drilling respectively, mainly investigate slip casting
Speed v1, pressure release speed v2And total grout absorption Q, it is assumed that efficiency factor M, then the concentration proportioning computing formula of i-th group of slurries be：
Wherein, i=1,2,3 ... 6；N=sample sizes；
(32) observe the whole hole, the pulp of drilling last, pulp when total grout absorption, the diffusion model of slurries is simplified to
Highly for this layer of limestone thickness equivalent continuum medium cylinder model, be 0.1% to calculate isotropism and respectively according to voidage
Dilation angle in the case of anisotropy；
(33) spacing of the whole hole, drilling is determined according to the result of calculation of dilation angle in step (32).
Base plate limestone aquifer of the present invention is transformed into the method that nature is manually combined complete water barrier, wherein the slip casting material
Expect for 325# Portland cements, the concentration of slurry quality proportioning of the cement is 1:1.
Base plate limestone aquifer of the present invention is transformed into the method that nature is manually combined complete water barrier, wherein slurries note
Single liquid cement mortar of fashionable employing water and the cement, final grouting pressure is 12.08MPa, 5～10L/min of injection speed, institute
State whole hole, the midge amount of drilling and be not more than 20L/min.
Base plate limestone aquifer of the present invention is transformed into the method that nature is manually combined complete water barrier, above-mentioned steps 2. in also
The step of being included in the larger described whole hole of grouting amount, drilling other drillings of complement nearby.
Base plate limestone aquifer of the present invention is transformed into the method that nature is manually combined complete water barrier, above-mentioned steps 4. in adopt
With water inrush coefficient method, by calculating critical water inrush coefficient KFaceSlip casting effect is evaluated, computing formula is：
KFace=P/M
Wherein：The maximum hydraulic pressure that P- seat earth water barriers bear,
M- ground and down-hole drilling 1 coal seam floor of actual exposure are very thick to 4 grey base plates.
Base plate limestone aquifer of the present invention is transformed into nature and is manually combined the method for complete water barrier by aqueous to limestone
Layer is analyzed to the threat that 1 coal mining is caused, and is drilled using 1 coal seam floor limestone of underground construction, and cement mortar is passed through into high pressure
In grouting pump injection hole, the diffusion by slurries in limestone reaches the grouting and reinforcing to too grey epimere, too grey after reinforcing
Epimere and too grey stage casing relative water resisting layer composition nature-and complete water-resisting key strata is manually combined, improve floor rock and integrally resist
The critical value of Compressive Strength and water bursting coefficient, while blocking, having transformed permeable structure, has effectively prevented and treated tiny vertical more circulation road
And side path, the filler block of height and intensity enough is defined, to vertical concentration passage, (water guide ruptures and water guide karst collapse col umn
Deng) emphasis closure has been carried out, the preventing and treating to the high pressure-bearing limestone water damage in deep is realized, it is that the back production of working face has safely provided weight
Ensure.
Below in conjunction with the accompanying drawings the side that nature is manually combined complete water barrier is transformed into the base plate limestone aquifer of the present invention
Method is described further.
Description of the drawings
Fig. 1 is that base plate limestone aquifer of the present invention is transformed into nature and is manually combined in the method for complete water barrier the work of 1 coal
The flat cutting faces schematic diagram of face grout transformation.
Specific embodiment
As shown in figure 1, being transformed into the side that nature is manually combined complete water barrier with base plate limestone aquifer of the present invention below
Method is specifically described as a example by the performance on a certain working face in mining area to technical scheme.
Base plate limestone aquifer is transformed into the method that nature is manually combined complete water barrier, comprises the following steps：
1. carry out preventing and treating the limestone water damage research of seat earth 100 in exploitation working face, i.e., to limestone aquifer to 1 coal 600
The threat that exploitation is caused is analyzed, and Jing simulations, calculating, site-test analysis determine the mining influence collapse dept of seat earth 100, and
Thereby determine that using the too grey ash 200 of epimere 3,4 ashes 300 as grouting and reinforcing target zone.
Limestone borehole data and calmodulin binding domain CaM Information integration analysis according to the upper and lower construction of the mine, each layer of Taiyuan Forma-tion
In limestone, with 3 ashes 200,4 ashes 300,12 grieshoch as thick-layer limestone, watery is stronger.Field data and theoretical research show, coal
The layer mining influence collapse dept of base plate 1 is acted on the ore deposit pressure of working face and the survivability of seat earth is relevant, seat earth
100 mining influence collapse depts and mining depth direct proportionality, its computing formula is：
h1=0.0085H+0.1665 α+0.1079L-4.3579
Wherein：h1- Effect of Coal-mining On The Floor collapse dept, unit：m；
H-mining depth, unit：m；
α-seam inclination, unit：°；
L-stope width, unit：m；
Drawn by above-mentioned computing formula and this mining area measured value, the mining influence of seat earth 100 at this working face place breaks
Bad depth h1=18.3m, and drawn by RFPA and FLAC numerical simulations adopt plate destructing depth be respectively 19m and
19.5m, so its base plate maximal destruction depth is at maximum up to 1 coal seam floor and intercepts water lane, grouting and reinforcing section will not be adopted because of working face and received
Base plate Mining failure affects.Therefore, select to intercept water 1 ash 400 of the too grey epimere of lane base plate, 2 ashes 500,3 ashes 200,4 ashes 300 are carried out
Grouting and reinforcing, emphasis 3 ashes 200,4 ashes 300 are reinforced after as the water-resisting key strata 700 for reproducing, improve water bursting coefficient
Critical value.Limestone is compared with mud stone, and water proof ability is very nearly the same, but intensity differs greatly, and reproduces the compound water proof of limestone crucial
Layer more has advantage for preventing and treating karst water.
2. along the whole hole of limestone incline direction construction of 3 ashes 200,4 ashes 300, along the concordant construction drill of 4 ashes 300, plus wammel
Hole discloses limestone length.Meanwhile, drainability allow in the case of to water outlet end hole, drilling carry out it is unrestrained.Above-mentioned whole hole, brill
Hole each acts as the injected hole of grouting and reinforcing, using the drilling of these underground constructions, cement mortar is bored by high-pressure injection pump injection
In hole, the diffusion by slurries in limestone reaches the grouting and reinforcing to too grey epimere.It is to obtain preferably note during practice of construction
Slurry consolidation effect, is effectively prevented excessive slurry, it is ensured that slurries effectively spread between injected hole, can be with described in larger in grouting amount
Whole hole, drilling other drillings of complement nearby.
3. minority water outlet, and the less situation of water yield are had according to the whole hole, drilling constructed at present, using applying
Whole aperture layer position 300 base plate grey to 4 of work carries out forward probe, and using whole hole, drilling as slip casting passage to the ash 200,4 of base plate 3
Ash 300 carries out grouting and reinforcing transformation.Forward probe is《Mine geological hazards specify》It is distinctly claimed, for by water damage threatening area
Driving face must take physical prospecting, probing, change the advanced method for surveying such as spy, find out driving front hydrological geological conditions, can
Driving.Concrete detection method can refer to routine techniques, not repeat herein.Geophysical Anomalies area, structure development to above-mentioned working face
Section, cut a position, first weighting position, periodic weighting position and stop adopting near line, emphasis utilizes above-mentioned whole hole, drilling,
That is the ash 200 of down-hole base plate 3,4 grey 300 limestone drillings carry out emphasis grouting and reinforcing and transformation, wherein, in these whole holes, drilling
Heart line is acute angle with the angle of above-mentioned 3 ash 200,4 grey 300 limestone rock stratum directions.
Preferably, the whole hole of above-mentioned grouting and reinforcing, drilling adopts method of absolute coordinate system cloth hole pattern, i.e. drilling-machine shifter, adopts
Take preset angle configuration positioning.Using such injected hole layout pattern, face hole position is laid reasonable, it is adaptable to geological drilling rig.
Above-mentioned steps 3. in also need to be analyzed the rock cranny density of 3 ash 200,4 ashes 300, study many cracks
The Permeability of rock and mobility status of composition, and tested by injecting paste material, suitable injecting paste material is selected, and while determine note
Slurry amount, final grouting pressure, the ratio of mud, dilation angle and drill hole density, concrete steps include：
(31) before formal slip casting, different types of slurries are selected, in the base plate of the working face associated field test are carried out,
Six groups of concentration of each slurries type point, carry out grouting test in six groups of different described whole holes, drilling respectively, mainly investigate slip casting
Speed v1, pressure release speed v2And total grout absorption Q, wherein slip casting speed v1, pressure release speed v2Faster, slip casting is more effective, meanwhile, just
Beginning concentration h is higher, and slip casting effect is better, and total grout absorption Q is bigger, and result of the test is closer to true effect, it is assumed that an efficiency factor
M, then the concentration proportioning computing formula of i-th group of slurries be：
Wherein, i=1,2,3 ... 6；N=sample sizes；
M values are qualitatively to judge slurries effect, and the less slip casting of M values is more effective.
Jing actual measurements, calculating are known：
1) with the lifting of initial concentration h, slip casting speed v1Present and accelerate downward trend, M value turning points substantially to exist
1:1 and 1.5:Between 1.
2) knowable to the M values that each drill site is calculated, M values minimum of a value is substantially 0.75:1 and 1.5:Between 1, wherein-
The 650m1 coals east wing intercepts water S7-1# holes, the S19-2# holes of 10# drill sites of lane 4# drill sites, due to just having satisfied during the testing of materials
With, presentation slip casting speed dramatic decrease state, therefore the M value distortions for obtaining.
3) from the point of view of site operation situation, add yellow mud and flyash to increase workload in slurries, and yellow mud
Grain size is difficult to control, it is difficult to be dissolved in water, nearly all precipitation forms block, it is easy to break slip casting machine, therefore yellow mud does not take into account
In entering injecting paste material, and the actual effect of flyash and yellow mud does not have, and cement effect is good, intensity is high.
4) from economic benefit, the transport of yellow mud and pulverized fuel ash slurry material and slurrying flow process are complicated, and expense is compared with cement
Slurries are high, but can be seen that this slip casting grout consumption simultaneously less from test drilling grouting amount.
The injecting paste material in above-mentioned analysis, the present invention can select 325# Portland cements, the cement
Concentration of slurry quality proportioning be 1:1.So, Meteorological is not high, good in economic efficiency.
(32) observe grouting and reinforcing end hole, the pulp of drilling last, pulp when total grout absorption, diffusion model is simplified
Into height for the equivalent continuum medium of this layer of limestone thickness cylinder model, according to voidage be 0.1% calculate isotropism with
Dilation angle in the case of anisotropy, specific algorithm is referring to common knowledge.Can according to slurries flowing law and Diffusion Law
Know, when slurries spread, the radial direction of the whole hole in edge or drilling spreads in elliposoidal, and is then concordant expansion along the axial direction of whole hole or drilling
Dissipate.
Following table is whole hole or drilling dilation angle test data list in the present embodiment：
(33) spacing of the whole hole, drilling is determined according to the result of calculation of dilation angle in step (32).Preferably, note
Slurry pitch of holes can be 44m, for the sake of assurance and be advantageously implemented Cross slot interference slip casting between injected hole, and slip casting pitch of holes can shorten
To 30m.
According to the test of the present embodiment, this mining area working face inlet well of constructing altogether is accumulative 184, injection 1：1 concentration water
Mud 248.449m3, inject cement 221.312t.
Preferably, using single liquid cement mortar when slurries of the invention inject, final grouting pressure is 12.08MPa, and injection speed is
5～10L/min or less, the midge amount of the grouting and reinforcing drilling is not more than 20L/min.To meet hydrogeology, colliery
The slip casting effect requirement of anti-regulation of harnessing the river.
4. after grouting and reinforcing is finished, using physical prospecting, boring coring or water injection test method to before and after slip casting rock stratum every
It is aqueous to carry out comparative study, evaluate slip casting effect.
1) geophysical prospecting method：Geophysical prospecting can on a macro scale evaluate slip casting effect, being longitudinally continuous especially for curtain-grouting
Property detection.Physical prospecting is carried out before slip casting using the physical prospecting means such as transient electromagnetic method and electrical method, so as to draw the rich water of floor strata
Situation and geological structure situation, rock stratum apparent resistivity is of a relatively high, is normal rock stratum, and rock stratum apparent resistivity is relatively low, reflection
The interval rock stratum is abnormal area., again using the detection checking of physical prospecting means, ground quality structure is verified after grouting and reinforcing with the conditions of
Make situation and rich water situation.The front rock stratum apparent resistivity of physical prospecting Changing Pattern, especially slip casting is relatively low before and after contrast slip casting
Region.If detecting apparent resistivity relatively low region in rock stratum after slip casting, again drilling verification monitoring should be carried out to it.
2) drilling method：According to the Diffusion Law of analysis slip casting rear slurry, the region not being diffused in slurries and slip casting
Detecting the relatively low region of resistivity in physical prospecting afterwards should carry out detection checking using drilling method, to evaluate its slip casting
Effect.Its slip casting effect is checked using " hole is multiplex " principle in probing method detection, the drilling not only can be macroscopically
Eye slit fills situation, to judge slip casting effect, can also also serve as water injection test, impervious experiment etc. to detect that slip casting is imitated
Really, and can the means such as mechanical property tested to detect its rock of coring carry out overall merit slip casting effect.
The concrete operation method of above-mentioned physical prospecting, boring coring or water injection test can be found in common knowledge, not repeat herein.
In addition, after grouting and reinforcing is finished, also to adopt water inrush coefficient method, critical water inrush coefficient K is calculatedFace, to slip casting effect
Evaluated, water bursting coefficient is defined as the hydrostatic pressure that the unit impermeable layer thickness of seat earth 100 is born, and it is mining under safe waterpressure of aquifer
Under the conditions of weigh the gushing water degree of danger of seat earth 100 quantitative target.
Critical water inrush coefficient KFaceComputing formula be：
KFace=P/M
Wherein：The maximum hydraulic pressure that the water barrier of P- seat earths 100 bears,
(referred to 1 seat earth is extremely to 4 grey 300 base plates very thickness for M- ground and the actual exposure base plate of 1 coal 600 of down-hole drilling
The average thickness of the 4th layer of limestone of Taiyuan Forma-tion, be《Mine geological hazards specify》And geology common knowledge).
In the present embodiment, shown according to drilling water level in the range of this mine working face, 5 ashes 800 and layers below limestone contain
Water layer water level be -300～-480m, peak level absolute altitude be -300m, a height of -644.9m of working face mining lowest bid, base plate every
The maximum hydraulic pressure that water layer bears is 3.65Mpa, and M=52～65m (takes ground and down-hole drilling discloses the base plate of 1 coal 600 to 4 ashes 300
The very thick minimum of a value of base plate and maximum), the last result of calculation of the present embodiment is：KFace=0.035～0.052MPa/m.
In sum, the method for the present invention is grey using the too grey ash 200,4 of epimere 3 of grouting and reinforcing boring grouting reinforcing transformation
300 layers of limestone, form filler block so that the grey 300 layers of limestone watery of 3 ash 200,4 are substantially reduced, and by grouting and reinforcing 3 are transformed
The 300 layers of limestone of ash of ash 200,4 are water barrier, and also undiscovered 3 ash 200,4 grey 300 limestone layer vertical passages have been carried out in advance
Filling, reinforcing, 300 layers of limestone of the ash of 3 ash 200,4 are no longer water-bearing layer, but have combined to form 1 coal 600 and exploited with too grey stage casing
Seat earth 100 water-resisting key strata 700, to Taiyuan Forma-tion limestone, Ordovician limestone below 3 ashes 200,400 grieshoch limestones
Water-resisting key strata is played a part of in water-bearing layer, prevents deep too grey and Ordovician limestone high artesian from importing ore deposit by buried structure
Hole, improves water inrush coefficient threshold, and forms the 3rd road defence line for preventing and treating the base plate limestone water damage of 1 coal 600, is effectively guaranteed
The back production safety of working face.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present invention
Enclose and be defined, on the premise of without departing from design spirit of the present invention, technical side of the those of ordinary skill in the art to the present invention
Various modifications and improvement that case is made, all should fall in the protection domain of claims of the present invention determination.
Claims (7)
1. base plate limestone aquifer is transformed into the method that nature is manually combined complete water barrier, it is characterised in that：Including following step
Suddenly：
1. the water damage research of preventing and treating seat earth (100) limestone is carried out in exploitation working face, Jing simulations, calculating, site-test analysis determine
Seat earth (100) the mining influence collapse dept, and thereby determine that too grey epimere 3 grey (200), 4 grey (300) as note
The target zone that slurry is reinforced；
2. along described 3 grey (200), the whole hole of limestone incline direction construction of 4 grey (300), along the concordant construction of described 4 grey (300)
Drilling, the described whole hole, drilling in the case where drainability is allowed to water outlet carries out unrestrained；
3. described 4 grey (300) are carried out with forward probe using the whole aperture layer position constructed, and using the whole hole, drilling as note
Slurry passage carries out grouting and reinforcing transformation to described 3 grey (200), 4 grey (300), and the Geophysical Anomalies area, construction to the working face is sent out
Section is educated, a position, first weighting position, periodic weighting position is cut and is stopped adopting near line, emphasis utilizes the whole hole, drilling
Carry out emphasis grouting and reinforcing and transformation, wherein, the whole hole, drilling center line with described 3 grey (200), 4 grey (300)
Rock stratum direction forms acute angle；
4. comparative study is carried out to the water-resisting property of rock stratum before and after slip casting using the method for physical prospecting, boring coring or water injection test, is commented
Valency slip casting effect,
Above-mentioned steps 1. in, seat earth (100) the mining influence collapse dept and mining depth direct proportionality, its meter
Calculating formula is：
h1=0.0085H+0.1665 α+0.1079L-4.3579,
Wherein：h1- seat earth (100) mining influence collapse dept, unit：m；
H-mining depth, unit：m；
α-seam inclination, unit：°；
L-stope width, unit：m.
2. base plate limestone aquifer according to claim 1 is transformed into the method that nature is manually combined complete water barrier, its
It is characterised by：Above-mentioned steps 3. in, the whole hole, drilling adopt method of absolute coordinate system cloth hole pattern, i.e. drilling-machine shifter, take angle
Method is positioned.
3. base plate limestone aquifer according to claim 2 is transformed into the method that nature is manually combined complete water barrier, its
It is characterised by：Above-mentioned steps 3. in also need to be analyzed the rock cranny density of described 3 grey (200), 4 grey (300), study many
The Permeability of rock and mobility status of crack composition, and tested by injecting paste material, suitable injecting paste material is selected, and it is while true
Determine grouting amount, final grouting pressure, the ratio of mud, dilation angle and drill hole density, concrete steps include：
(31) before formal slip casting, different types of slurries are selected, in the base plate of the working face associated field test is carried out, each
Six groups of concentration of slurries type point, carry out grouting test in six groups of different described whole holes, drilling respectively, main to investigate slip casting speed
v1, pressure release speed v2And total grout absorption Q, it is assumed that efficiency factor M, then the concentration proportioning computing formula of i-th group of slurries be：
Wherein, i=1,2,3 ... 6；N=sample sizes；
(32) observe the whole hole, the pulp of drilling last, pulp when total grout absorption, the diffusion model of slurries is simplified to into height
For the cylinder model of the equivalent continuum medium of this layer of limestone thickness, isotropism is calculated for 0.1% and each to different according to voidage
Dilation angle under implementations；
(33) spacing of the whole hole, drilling is determined according to the result of calculation of dilation angle in step (32).
4. base plate limestone aquifer according to claim 3 is transformed into the method that nature is manually combined complete water barrier, its
It is characterised by：The injecting paste material is 325# Portland cements, and the concentration of slurry quality proportioning of the cement is 1:1.
5. base plate limestone aquifer according to claim 4 is transformed into the method that nature is manually combined complete water barrier, its
It is characterised by：Using single liquid cement mortar of water and the cement when slurries inject, final grouting pressure is 12.08MPa, note
Slurry 5～10L/min of speed, the whole hole, the midge amount of drilling are not more than 20L/min.
6. base plate limestone aquifer according to claim 5 is transformed into the method that nature is manually combined complete water barrier, its
It is characterised by：Above-mentioned steps 2. in, be additionally included in the step of the larger described whole hole of grouting amount, drilling other drillings of complement nearby
Suddenly.
7. base plate limestone aquifer according to any one of claim 1 to 6 is transformed into nature and is manually combined complete water proof
The method of layer, it is characterised in that：Above-mentioned steps 4. middle employing water inrush coefficient method, by calculating critical water inrush coefficient KFaceSlip casting is imitated
Fruit is evaluated, and computing formula is：
KFace=P/M
Wherein：The maximum hydraulic pressure that P- seat earths (100) water barrier bears,
M- ground and actual exposure 1 coal (600) base plate of down-hole drilling are very thick to 4 grey (300) base plates.
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|---|---|---|---|---|
| CN106050234B (en) * | 2016-05-26 | 2019-01-25 | 中国神华能源股份有限公司 | The construction technology that underground water is protected in progress of coal mining |
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| CN106907152B (en) * | 2017-04-06 | 2019-01-25 | 安徽理工大学 | A kind of soil type inlet well arrangement and grouting method |
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| CN110344850A (en) * | 2019-08-09 | 2019-10-18 | 中煤新集能源股份有限公司 | A kind of seam mining bottom plate limestone water control method |
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| CN112664192B (en) * | 2020-12-11 | 2023-07-18 | 中国矿业大学 | Method for improving coal mining upper limit in thin bedrock area |
| CN112901157B (en) * | 2021-01-15 | 2024-05-10 | 陕西彬长孟村矿业有限公司 | Fault multi-branch advanced detection hole distribution method |
| CN112901268B (en) * | 2021-01-19 | 2021-09-28 | 宿州学院 | Method for preventing and treating water damage of coal seam floor |
| CN113294143B (en) * | 2021-04-16 | 2023-09-26 | 中煤能源研究院有限责任公司 | Method for evaluating investigation treatment effect of advanced ground area of limestone water damage of coal seam floor |
| CN114934757A (en) * | 2022-05-31 | 2022-08-23 | 彬县水帘洞煤炭有限责任公司 | Water spraying treatment process for underground tunneling roadway of coal seam immediate roof aquifer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1963148A (en) * | 2006-11-17 | 2007-05-16 | 中国矿业大学 | Water-protection coal-mining method using structural key layer as waterproof layer |
| CN101050709A (en) * | 2006-04-03 | 2007-10-10 | 郭国政 | High water pressure releasing and blocking mining method for mining area |
| CN101608552A (en) * | 2008-06-18 | 2009-12-23 | 郭国政 | The seat earth aquifer reinforces and protects the method for water barrier in reinforcing process |
| CN102767371A (en) * | 2012-06-25 | 2012-11-07 | 西安科技大学 | Method for realizing water-preserved mining by utilizing curtain grouting technology |
| CN102877884A (en) * | 2012-09-13 | 2013-01-16 | 山东能源集团有限公司 | Method for modification and construction of top of Ordovician limestone of mine based on kilometer directional drilling technique |
-
2015
- 2015-06-02 CN CN201510297909.2A patent/CN104989403B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050709A (en) * | 2006-04-03 | 2007-10-10 | 郭国政 | High water pressure releasing and blocking mining method for mining area |
| CN1963148A (en) * | 2006-11-17 | 2007-05-16 | 中国矿业大学 | Water-protection coal-mining method using structural key layer as waterproof layer |
| CN101608552A (en) * | 2008-06-18 | 2009-12-23 | 郭国政 | The seat earth aquifer reinforces and protects the method for water barrier in reinforcing process |
| CN102767371A (en) * | 2012-06-25 | 2012-11-07 | 西安科技大学 | Method for realizing water-preserved mining by utilizing curtain grouting technology |
| CN102877884A (en) * | 2012-09-13 | 2013-01-16 | 山东能源集团有限公司 | Method for modification and construction of top of Ordovician limestone of mine based on kilometer directional drilling technique |
Non-Patent Citations (2)
| Title |
|---|
| 浅谈注浆改造煤层底板灰岩含水层;李百贵;《西部探矿工程》;20021225(第06期);全文 * |
| 葛泉矿煤层底板承压隔水层整体注浆加固技术;赵兵文;《煤炭科学技术》;20081025(第10期);第87页第2节、88页第5节 * |
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