CN110159267A - A kind of water-bearing layer segmenting slip casting curtain water retaining mining method - Google Patents
A kind of water-bearing layer segmenting slip casting curtain water retaining mining method Download PDFInfo
- Publication number
- CN110159267A CN110159267A CN201910312241.2A CN201910312241A CN110159267A CN 110159267 A CN110159267 A CN 110159267A CN 201910312241 A CN201910312241 A CN 201910312241A CN 110159267 A CN110159267 A CN 110159267A
- Authority
- CN
- China
- Prior art keywords
- water
- exploiting field
- curtain
- grouting curtain
- bearing layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 101
- 238000005065 mining Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000007569 slipcasting Methods 0.000 title claims abstract description 13
- 239000003245 coal Substances 0.000 claims abstract description 82
- 238000004519 manufacturing process Methods 0.000 claims abstract description 33
- 238000004064 recycling Methods 0.000 claims abstract description 11
- 238000000605 extraction Methods 0.000 claims abstract description 8
- 238000010008 shearing Methods 0.000 claims description 7
- 230000008030 elimination Effects 0.000 abstract description 4
- 238000003379 elimination reaction Methods 0.000 abstract description 4
- 238000005520 cutting process Methods 0.000 abstract description 3
- 239000004568 cement Substances 0.000 description 8
- 235000019353 potassium silicate Nutrition 0.000 description 8
- 238000011084 recovery Methods 0.000 description 8
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 8
- 239000000463 material Substances 0.000 description 5
- 239000004927 clay Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Remote Sensing (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention discloses a kind of water-bearing layer segmenting slip casting curtain water retaining mining methods, including water-bearing layer and coal seam；A, it obtains Basic Geological parameter and carries out mining engineering design, determine the direction of subsurface flow and position and the size of the first exploiting field grouting curtain；B, then prefabricated first exploiting field grouting curtain in the water-bearing layer above the first protection coal pillar in water flow updrift side carries out normal back production to the first exploiting field until back production finishes；C, the prefabricated second exploiting field grouting curtain in water-bearing layer, then finishes to back production；D, realization the first exploiting field grouting curtain elimination is adopted by the first protection coal pillar of recycling or with the second exploiting field；E, the second protection coal pillar 2b and the second exploiting field grouting curtain 2w are handled according to the working method of step b, c, d, and so on, until entire coal seam full extraction finishes.The present invention realizes water protection mining by building curtain；And allow grouting curtain to eliminate automatically, prevent curtain for a long time cutting nourishment condition and influence the variation of earth's surface ecology.
Description
Technical field
The present invention relates to field of coal mining, specially a kind of water-bearing layer segmenting slip casting curtain water retaining mining method.
Background technique
Underground coal exploitation causes overlying rock that movement and deformation occurs, and crack generates and original water barrier may be made to become
Pervious bed causes level of ground water decline even to miss.Especially in rich coal resources and the northwest development of water resources shortage this
One is particularly problematic.How to realize that mining area exploitation of coal resources is mutually coordinated to have become academia, business circles with fwaater resources protection
The great demand of one of hot spot of concern, even more national strategy and social harmonious development.
Have proposed at present and carry out the water-protection coal-mining method of application and be broadly divided into two major classes: one is by reserved coal pillar or
The mode for reducing exploitation size reduces the development height of water flowing fractured zone.Such as limit for height exploitation, Striping noise, room and pillar mining or short
Wall exploitation etc., but often coal resources recovery ratio is low；Second is that being covered on when being adopted by modes such as goaf fillings to weaken aqueous
The disturbance of layer.Such as solid filling, paste body filling, high-water material filling or absciss layer grouting filling, but often complex process, adopt and fill
Interference is affected to production efficiency, working face production capacity.Especially in the exploitation of northwest Large-scale Coal base, how in coal
Water-retaining production is realized on the basis of the high-recovery and high efficiency of resource, is a problem to be solved.
Summary of the invention
The purpose of the present invention is to provide a kind of water-bearing layer segmenting slip casting curtain water retaining mining methods, to solve above-mentioned background
The problem of water-retaining production is realized on the basis of the high-recovery of coal resources and high efficiency is proposed how in technology.
To achieve the above object, The technical solution adopted by the invention is as follows: a kind of water conservation of water-bearing layer segmenting slip casting curtain is opened
Mining method, the coal seam including water-bearing layer and below water-bearing layer are further comprising the steps of:
A, it obtains the Basic Geological parameter in place of working and carries out reasonable mining engineering design, determine water-bearing layer subsurface flow
Direction and the first exploiting field grouting curtain position and size；
B, the prefabricated first exploiting field grouting curtain vertical with water (flow) direction in the water-bearing layer above the first protection coal pillar, so
Normal back production is carried out to the first exploiting field until back production finishes afterwards；
C, the prefabricated second exploiting field grouting curtain vertical with water (flow) direction in the water-bearing layer above the second protection coal pillar, so
Normal back production is carried out to the second exploiting field until back production finishes afterwards；
D, realization the first exploiting field grouting curtain elimination is adopted by the first protection coal pillar of recycling or with the second exploiting field；
E, the second protection coal pillar and the second exploiting field grouting curtain are handled according to the working method of step b, c, d, according to
It is secondary to analogize, until entire coal seam full extraction finishes.
The present invention is implemented with following step for b's:
B1, before back production, first construct first exploiting field the first grouting curtain, during the first working face extraction,
Continue to construct the second grouting curtain；
B2, normal back production is carried out to the second working face again；
B3, according to the working method of step b1 and step b2, the third working face adjacent to the second working face is exploited,
Until the first exploiting field full extraction finishes.
Wherein, Basic Geological parameter and design parameter include: in step a
First exploiting field grouting curtain water flow downstream direction edge to the first protection coal pillar water flow downstream side extrorse first
Stop adopting the distance between line L；
First protection coal pillar, which stays, sets width W；
Travelling limit angle δ；
Vertical range H at the top of water-bearing layer bottom to the first protection coal pillar；
The thickness deltat of first grouting curtain；
The shearing strength τ of first grouting curtain；
The length l of first grouting curtain；
The hydraulic pressure q in water-bearing layer；
Water-bearing layer thickness h；
Face length m；
Advance of the face length n；
The length l ' of second grouting curtain；
WhereinL≥Hcotδ；
One embodiment of the present of invention: it is adopted in step d by the second exploiting field and realizes that the first exploiting field grouting curtain disappears automatically
The condition removed includes:
1. L > W, the first exploiting field grouting curtain is located at except the first protection coal pillar vertical range, and be located at the second exploiting field it
It is interior；
Or
②And Hcot δ > (W-L- Δ), the first exploiting field grouting curtain are located at the vertical model of the first protection coal pillar
On enclosing, and it is located within the second exploiting field Affected areas by mining.
One embodiment of the present of invention: realize that the first exploiting field grouting curtain disappears by the first protection coal pillar of recycling in step d
The condition removed includes:
①First exploiting field grouting curtain is located within the first protection coal pillar vertical range, while also position
Except the second exploiting field Affected areas by mining；
Or
②And Hcot δ≤(W-L- Δ), the first exploiting field grouting curtain are located at the vertical model of the first protection coal pillar
Within enclosing, while also being located at except the second exploiting field Affected areas by mining.
Compared with prior art, the invention has the following beneficial effects:
Water protection mining is realized by building curtain；And it is adopted by the second exploiting field or the recycling of the first protection coal pillar realizes the
One exploiting field grouting curtain is eliminated automatically, prevent curtain for a long time cutting nourishment condition and influence the variation of earth's surface ecology.
Detailed description of the invention
Fig. 1 is structure top view of the invention；
Fig. 2 is located at except protection coal pillar for grouting curtain and illustrates；
Fig. 3 is that grouting curtain is located at situation 1 on protection coal pillar；
Fig. 4 is that grouting curtain is located at situation 2 on protection coal pillar；
Fig. 5 is that grouting curtain is located at situation 3 on protection coal pillar.
In figure, 1 first exploiting field, 11 first the first working faces of exploiting field, 12 first the second working faces of exploiting field, 13 first exploiting fields
Three working faces, the first exploiting field 1w grouting curtain, the first exploiting field 11w the first grouting curtain, the first exploiting field 12w second work
Face grouting curtain, the first exploiting field 13w third grouting curtain, the first exploiting field 1t stop adopting line, the first protection coal pillar of 1b, 2
Two exploiting fields, 21 second the first working faces of exploiting field, 22 second the second working faces of exploiting field, 23 second exploiting field third working faces, 2w second
Exploiting field grouting curtain, the second exploiting field 21w the first grouting curtain, the second exploiting field 22w the second grouting curtain, 23w
Second exploiting field third grouting curtain, the second exploiting field 2t stop adopting line, the second protection coal pillar of 2b, 3 grouting pipes, 4 water-bearing layers,
5 earth's surfaces, 6 contour of water tables.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Invention is further described in detail in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, underground coal exploitation causes overlying rock that movement and deformation occurs, crack generates and may make original
Water barrier becomes pervious bed, and level of ground water decline is caused even to miss.So in order to realize safety and high efficiency, spy is proposed such as
Lower method:
A kind of water-bearing layer segmenting slip casting curtain water retaining mining method, the coal including water-bearing layer 4 and positioned at 4 lower section of water-bearing layer
Layer, specific implementation step is:
A, it obtains the Basic Geological parameter in place of working and carries out reasonable mining engineering design, determine 4 underground water of water-bearing layer
The direction of stream 6 and position and the size of the first exploiting field grouting curtain 1w；
B, the prefabricated first exploiting field grouting curtain vertical with water (flow) direction in the water-bearing layer 4 above the first protection coal pillar 1b
Then 1w carries out normal back production to the first exploiting field 1 until back production finishes；
C, the prefabricated second exploiting field grouting curtain vertical with water (flow) direction in the water-bearing layer 4 above the second protection coal pillar 2b
Then 2w carries out normal back production to the second exploiting field 2 until back production finishes；
D, realization the first exploiting field grouting curtain 1w elimination is adopted by the first protection coal pillar 1b of recycling or with the second exploiting field 2；
E, at according to the working method of step b, c, d to the second protection coal pillar 2b and the second exploiting field grouting curtain 2w
Reason, and so on, until entire coal seam full extraction finishes.
Include the steps that in step b of the invention as follows:
B1, before back production, 1 first grouting curtain 11w of the first exploiting field is first constructed, in 11 back production of the first working face
Cheng Zhong continues to construct the second grouting curtain 12w；
B2, normal back production is carried out to the second working face 12 again；
B3, according to the working method of step b1 and step b2, the third working face 13 adjacent to the second working face 12 carries out
Exploitation, until 1 full extraction of the first exploiting field finishes.
This form of construction work that curtain is constructed in exploitation, which has, follows on-site actual situations, and flexible and changeable feature has
Conducive to raising working efficiency.
In implementation process, Basic Geological parameter and design parameter include: in step a of the present invention
The first exploiting field water flow downstream direction edge grouting curtain 1w is extrorse to the first protection coal pillar 1b water flow downstream side
First stops adopting the distance between line 1t L；First protection coal pillar 1b, which is stayed, sets width W；Travelling limit angle δ；4 bottom of water-bearing layer is to first
Vertical range H at the top of protection coal pillar 1b；The thickness deltat of first grouting curtain 11w；First grouting curtain 11w
Shearing strength τ；The length l of first grouting curtain 11w；The hydraulic pressure q in water-bearing layer 4；4 thickness h of water-bearing layer；Working face is long
Spend m；Advance of the face length n；The length 1 ' of second grouting curtain 12w；WhereinL
≥Hcotδ；
Wherein, the present invention is adopted by the second exploiting field 2 in step d and realizes what the first exploiting field grouting curtain 1w was eliminated automatically
Condition includes:
1. L > W, the first exploiting field grouting curtain 1w are located at except the first protection coal pillar 1b vertical range, and are located at the second exploiting field
Within 2；
Or
②And Hcot δ > (W-L- Δ), the first exploiting field grouting curtain 1w are located at the first protection coal pillar 1b and hang down
On straight range, and it is located within 2 second exploiting field Affected areas by mining of the second exploiting field.
The present invention realizes the condition that the first exploiting field grouting curtain 1w is eliminated by the first protection coal pillar 1b of recycling in step d
Include:
①First exploiting field grouting curtain 1w is located within the first protection coal pillar 1b vertical range, simultaneously
It also is located at except 2 Affected areas by mining of the second exploiting field；
Or
②And Hcot δ≤(W-L- Δ), the first exploiting field grouting curtain 1w are located at the first protection coal pillar 1b and hang down
Within the scope of straight, while also being located at except 2 Affected areas by mining of the second exploiting field.
Below with reference to site specific, further illustrates to adopt with the second exploiting field and realize that the first exploiting field grouting curtain 1w disappears
The mode removed:
Embodiment one:
As shown in figure 1 and 2, certain mine advance of the face length n=1800m, face length m=150m, minable coal seam
Thickness M=10m,.As shown in Fig. 2, face roof is away from water-bearing layer distance H=160m, water-bearing layer thickness h=10m, hydraulic pressure q=
1MPa.Protection coal pillar, which stays, sets width W=60m, travelling limit angle δ=70 °.
Step 1: extrorse side is walked apart from exploiting field in water-bearing layer 4 and arranges first exploiting field the first grouting curtain
11w, injecting paste material select cement-water-clay system, and the ratio of mud of cement is 0.8:1, and the Baume degrees of waterglass is 40 ° of B é, water
Glass: cement=1:1, curtain shearing strength τ=0.6MPa.Curtain lengthStop adopting with the first exploiting field
Line 1t distance is L >=Hcot δ=61.9m, thickness
Step 2: referring to Fig.1, the first exploiting field 1 by the first working face 11, the second working face 12, third working face 13 it is suitable
Sequence exploitation.In 11 recovery process of the first working face, the second working face 12 and prefabricated second grouting curtain 12w are arranged,
Then the second working face 12 is exploited, and so on.The length of third grouting curtain 13w
Its away from the first exploiting field stop adopting line 1t distance and thickness and step 1 result it is same.The production side of third grouting curtain 13w
Method is identical as the second grouting curtain 12w, until 1 working face mining of the first exploiting field finishes；
Step 3: referring to Fig.1, the second exploiting field 2 is according to the order mining similar to the first exploiting field 1.According to the method for step 1
It arranges the first working face 21 and its grouting curtain 21w, arranges the second working face 22, third working face 23 according to the method for step 2
And its grouting curtain 22w, 23w, until the exploitation of the second exploiting field 2 finishes；
Step 4: referring to Fig. 2, as L > W, the first exploiting field grouting curtain 1w be all located at the first protection coal pillar 1b of protection it
Outside, all within the second exploiting field 2.In second exploiting field, 2 mining active process, the first exploiting field grouting curtain 1w is eliminated automatically, the first exploiting field 1
Nourishment condition is restored in corresponding water-bearing layer 4, and the property of water-bearing is restored.Finally recycle protection coal pillar.
Embodiment two:
As shown in attached drawing 1 and 3, certain mine advance of the face length n=900m, face length m=150m, minable coal seam is thick
Spend M=1m.As shown in Figure 1, face roof is away from water-bearing layer distance H=100m, water-bearing layer thickness h=5m, hydraulic pressure q=
0.5MPa.Coal column, which stays, sets width W=60m, travelling limit angle δ=70 °.
Step 1: extrorse side is walked apart from exploiting field in water-bearing layer 4 and arranges first exploiting field the first grouting curtain
11w, injecting paste material select cement-water-clay system, and the ratio of mud of cement is 0.8:1, and the Baume degrees of waterglass is 40 ° of B é, water
Glass: cement=1:1, curtain shearing strength τ=0.6MPa.Grouting curtain lengthWith the first exploiting field
Stop adopting line 1t distance to be L >=Hcot δ=36.4m, thickness
Step 2: referring to Fig.1, the first exploiting field 1 by the first working face 11, the second working face 12, third working face 13 it is suitable
Sequence exploitation.In 11 recovery process of the first working face, the second working face 12 and prefabricated second grouting curtain 12w are arranged,
Then the second working face 12 is exploited, and so on.The length of third grouting curtain 13w
Its away from the first exploiting field stop adopting line 1t distance and thickness and step 1 result it is same.The production side of third grouting curtain 13w
Method is identical as the second grouting curtain 12w, until 1 working face mining of the first exploiting field finishes；
Step 3: referring to Fig.1, the second exploiting field 2 is according to the order mining similar to the first exploiting field 1.According to the method for step 1
It arranges the first working face 21 and its grouting curtain 21w, arranges the second working face 22, third working face 23 according to the method for step 2
And its grouting curtain 22w, 23w, until the exploitation of the second exploiting field 2 finishes；
Step 4: reference Fig. 3, whenAnd when Hcot δ > (W-L- Δ), all positions the first exploiting field grouting curtain 1w
On the first protection coal pillar 1b of protection, all within 2 second exploiting field Affected areas by mining of the second exploiting field.It adopts in the second exploiting field 2
In the process, the first exploiting field grouting curtain 1w is eliminated automatically, and nourishment condition is restored in the corresponding water-bearing layer 4 in the first exploiting field 1, and the property of water-bearing obtains
To restore.Finally recycle protection coal pillar.
Below with reference to site specific, further illustrates to recycle with the first protection coal pillar and realize the first exploiting field grouting curtain
The mode that 1w is eliminated:
Embodiment three:
As shown in attached drawing 1 and 4, certain mine advance of the face length n=1350m, face length m=200m, minable coal seam
Thickness M=6m.As shown in Figure 1, face roof is away from water-bearing layer distance H=30m, water-bearing layer thickness h=9m, hydraulic pressure q=
0.1MPa.Protection coal pillar, which stays, sets width W=60m, travelling limit angle δ=70 °.
Step 1: extrorse side is walked apart from exploiting field in water-bearing layer 4 and arranges first exploiting field the first grouting curtain
11w, injecting paste material select cement-water-clay system, and the ratio of mud of cement is 0.8:1, and the Baume degrees of waterglass is 40 ° of B é, water
Glass: cement=1:1, curtain shearing strength τ=0.6MPa.Grouting curtain lengthIt is adopted with first
Stop adopting line 1t distance to be L >=Hcot δ=10.92m, thickness in area
Step 2: referring to Fig.1, the first exploiting field 1 by the first working face 11, the second working face 12, third working face 13 it is suitable
Sequence exploitation.In 11 recovery process of the first working face, the second working face 12 and prefabricated second grouting curtain 12w are arranged,
Then the second working face 12 is exploited, and so on.The length of third grouting curtain 13w
Its away from the first exploiting field stop adopting line 1t distance and thickness and step 1 result it is same.The production side of third grouting curtain 13w
Method is identical as the second grouting curtain 12w, until 1 working face mining of the first exploiting field finishes；
Step 3: referring to Fig.1, the second exploiting field 2 is according to the order mining similar to the first exploiting field 1.According to the method for step 1
It arranges the first working face 21 and its grouting curtain 21w, arranges the second working face 22, third working face 23 according to the method for step 2
And its grouting curtain 22w, 23w, until the exploitation of the second exploiting field 2 finishes；
Step 4: reference Fig. 4, whenWhen, the first exploiting field grouting curtain 1w is all located at the first protection of protection
On coal column 1b, all except 2 Affected areas by mining of the second exploiting field.First exploiting field grouting curtain 1w can not pass through the second exploiting field 2
Adopt and eliminate automatically, then need to realize automatic elimination by way of recycling the first protection coal pillar 1b, the first exploiting field 1 is corresponding
Water-bearing layer 4 restore nourishment condition, the property of water-bearing restored.
Example IV:
As shown in attached drawing 1 and 5, certain mine advance of the face length n=1350m, face length m=150m, minable coal seam
Thickness M=9m.As shown in Figure 1, face roof is away from water-bearing layer distance H=50m, water-bearing layer thickness h=6m, hydraulic pressure q=
0.6MPa.Protection coal pillar, which stays, sets width W=60m, travelling limit angle δ=70 °.
Step 1: extrorse side is walked apart from exploiting field in water-bearing layer 4 and arranges first exploiting field the first grouting curtain
11w, injecting paste material select cement-water-clay system, and the ratio of mud of cement is 0.8:1, and the Baume degrees of waterglass is 40 ° of B é, water
Glass: cement=1:1, curtain shearing strength τ=0.6MPa.Grouting curtain lengthWith the first exploiting field
Stop adopting line 1t distance to be L >=Hcot δ=18.2m, thickness
Step 2: referring to Fig.1, the first exploiting field 1 by the first working face 11, the second working face 12, third working face 13 it is suitable
Sequence exploitation.In 11 recovery process of the first working face, the second working face 12 and prefabricated second grouting curtain 12w are arranged,
Then the second working face 12 is exploited, and so on.The length of third grouting curtain 13w
Its away from the first exploiting field stop adopting line 1t distance and thickness and step 1 result it is same.The production side of third grouting curtain 13w
Method is identical as the second grouting curtain 12w, until 1 working face mining of the first exploiting field finishes；
Step 3: referring to Fig.1, the second exploiting field 2 is according to the order mining similar to the first exploiting field 1.According to the method for step 1
It arranges the first working face 21 and its grouting curtain 21w, arranges the second working face 22, third working face 23 according to the method for step 2
And its grouting curtain 22w, 23w, until the exploitation of the second exploiting field 2 finishes；
Step 4: reference Fig. 5, whenAnd when Hcot δ≤(W-L- Δ), the first exploiting field grouting curtain 1w is
On the first protection coal pillar 1b of protection, all except 2 Affected areas by mining of the second exploiting field.First exploiting field grouting curtain 1w without
Method is eliminated automatically by the second adopting for exploiting field 2, then needs to disappear automatically by way of recycling the first protection coal pillar 1b to realize
It removes, nourishment condition is restored in the corresponding water-bearing layer 4 in the first exploiting field 1, and the property of water-bearing is restored.
The present invention proposes a kind of 4 segmenting slip casting curtain 1w water-protection coal-mining method of water-bearing layer.This method is on the one hand in working face
Preparation stage changes dynamic water flow velocity, flow direction and flow, short-term cutting supply by being segmented prefabricated grouting curtain 1w in water-bearing layer 4
Condition, makes that the water flow for flowing into goaf substantially reduces, flow velocity is greatly lowered, to realize the continuous safety open of working face
It adopts；On the other hand the automatic of curtain 1w is corresponded into realization working face by 2 back production of the second exploiting field or the first protection coal pillar 1b of recycling
It eliminates, to restore to target the property of water-bearing in water-bearing layer 4, realizes the water protection mining of production zone.The method increase recovery ratio and open
Efficiency is adopted, 11 mining phase of the first working face, 12 preparation stage of the second working face and prefabricated first exploiting field second is realized and works
Grouting curtain 12w work in face is synchronous to be carried out, and is a kind of safe and efficient water-protection coal-mining method.
Claims (5)
1. a kind of water-bearing layer segmenting slip casting curtain water retaining mining method, including water-bearing layer (4) and the coal being located at below water-bearing layer (4)
Layer, it is characterised in that: the following steps are included:
A, it obtains the Basic Geological parameter in place of working and carries out reasonable mining engineering design, determine water-bearing layer (4) subsurface flow
(6) position and the size in direction and the first exploiting field grouting curtain (1w)；
B, the prefabricated first exploiting field grouting curtain vertical with water (flow) direction in the water-bearing layer (4) above the first protection coal pillar (1b)
(1w) then carries out normal back production to the first exploiting field (1) until back production finishes；
C, the prefabricated second exploiting field grouting curtain vertical with water (flow) direction in the water-bearing layer (4) above the second protection coal pillar (2b)
(2w) then carries out normal back production to the second exploiting field (2) until back production finishes；
D, realize that the first exploiting field grouting curtain (1w) disappears by recycling the first protection coal pillar (1b) or adopting with the second exploiting field (2)
It removes；
E, at according to the working method of step b, c, d to the second protection coal pillar (2b) and the second exploiting field grouting curtain (2w)
Reason, and so on, until entire coal seam full extraction finishes.
2. segmenting slip casting curtain water retaining mining method in water-bearing layer according to claim 1, it is characterised in that:
B1, before back production, (1) first grouting curtain (11w) of the first exploiting field is first constructed, in the first working face (11) back production
In the process, continue to construct the second grouting curtain (12w)；
B2, normal back production is carried out to the second working face (12) again；
B3, according to the working method of step b1 and step b2, the third working face (13) adjacent to the second working face (12) carries out
Exploitation, until the first exploiting field (1) full extraction finishes.
3. segmenting slip casting curtain water retaining mining method in water-bearing layer according to claim 1, it is characterised in that: base in step a
This geologic parameter and design parameter include:
The first water flow downstream direction edge exploiting field grouting curtain (1w) is extrorse to the first protection coal pillar (1b) water flow downstream side
First stops adopting the distance between line (1t) L；
First protection coal pillar (1b), which stays, sets width W；
Travelling limit angle δ；
Vertical range H at the top of water-bearing layer (4) bottom to the first protection coal pillar (1b)；
The thickness deltat of first grouting curtain (11w)；
The shearing strength τ of first grouting curtain (11w)；
The length l of first grouting curtain (11w)；
The hydraulic pressure q in water-bearing layer (4)；
Water-bearing layer (4) thickness h；
Face length m；
Advance of the face length n；
The length l ' of second grouting curtain (12w)；
WhereinL≥Hcotδ；
4. segmenting slip casting curtain water retaining mining method in water-bearing layer according to claim 3, it is characterised in that:
Adopting the condition for realizing that the first exploiting field grouting curtain (1w) is eliminated automatically by the second exploiting field (2) in step d includes:
1. L > W, the first exploiting field grouting curtain (1w) is located at except the first protection coal pillar (1b) vertical range, and is located at the second exploiting field
(2) within；
Or
②And Hcot δ > (W-L- Δ), the first exploiting field grouting curtain (1w) are located at the first protection coal pillar (1b) and hang down
On straight range, and it is located within the second exploiting field (2) Affected areas by mining.
5. segmenting slip casting curtain water retaining mining method in water-bearing layer according to claim 3, it is characterised in that:
Include: by the condition that recycling the first protection coal pillar (1b) realizes that the first exploiting field grouting curtain (1w) is eliminated in step d
①First exploiting field grouting curtain (1w) is located within the first protection coal pillar (1b) vertical range, simultaneously
It also is located at except the second exploiting field (2) Affected areas by mining；
Or
②And Hcot δ≤(W-L- Δ), the first exploiting field grouting curtain (1w) are located at the first protection coal pillar (1b) and hang down
Within the scope of straight, while also being located at except the second exploiting field (2) Affected areas by mining.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910312241.2A CN110159267B (en) | 2019-04-18 | 2019-04-18 | Water-bearing stratum sectional grouting curtain water-retention mining method |
| PCT/CN2019/108491 WO2020211298A1 (en) | 2019-04-18 | 2019-09-27 | Water-conserving mining method employing segmented grout curtain for aquifer |
| ZA2020/05442A ZA202005442B (en) | 2019-04-18 | 2020-08-31 | Aquifer segmented grouting curtain water-preserved mining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910312241.2A CN110159267B (en) | 2019-04-18 | 2019-04-18 | Water-bearing stratum sectional grouting curtain water-retention mining method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110159267A true CN110159267A (en) | 2019-08-23 |
| CN110159267B CN110159267B (en) | 2020-06-02 |
Family
ID=67639564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910312241.2A Active CN110159267B (en) | 2019-04-18 | 2019-04-18 | Water-bearing stratum sectional grouting curtain water-retention mining method |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN110159267B (en) |
| WO (1) | WO2020211298A1 (en) |
| ZA (1) | ZA202005442B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020211298A1 (en) * | 2019-04-18 | 2020-10-22 | 中国矿业大学 | Water-conserving mining method employing segmented grout curtain for aquifer |
| CN114658485A (en) * | 2022-03-02 | 2022-06-24 | 中煤科工集团西安研究院有限公司 | Composite disaster treatment method for water damage and rock burst of thick and hard sandstone roof of coal mine |
| 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 |
| CN115012933A (en) * | 2022-05-20 | 2022-09-06 | 安徽恒源煤电股份有限公司 | Zonal grouting construction method for stoping fault waterproof coal pillar |
| CN115341902A (en) * | 2022-08-17 | 2022-11-15 | 中煤科工西安研究院(集团)有限公司 | Water-retaining coal mining method for lateral closed curtain of surrounding rock of coal mine working face |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115059105B (en) * | 2022-04-28 | 2023-07-14 | 中煤科工集团西安研究院有限公司 | Water curtain water retention method for sandstone water directional drilling along with mining along with injection along with monitoring of water in coal mine roof |
| CN114814981B (en) * | 2022-05-20 | 2022-11-29 | 安徽恒源煤电股份有限公司 | Grouting reinforcement effect evaluation method and system for fault waterproof coal pillar exploitation |
| CN117852313B (en) * | 2024-03-07 | 2024-05-10 | 山东大学 | Advanced sectional pre-grouting rapid numerical simulation method and system for underground engineering |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102505943A (en) * | 2011-11-21 | 2012-06-20 | 西安科技大学 | Water conservation coal cutting method for small and medium-sized coal mines in waterhead area |
| 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 |
| CN102865081A (en) * | 2012-04-28 | 2013-01-09 | 中国神华能源股份有限公司 | Water-preserved mining method |
| CN104775816A (en) * | 2015-02-27 | 2015-07-15 | 中国矿业大学 | Isolated grouting-filling mining method for overburden rock without village migration under cut-side local pressed-coal conditions |
| CN109139011A (en) * | 2018-08-02 | 2019-01-04 | 缪协兴 | A kind of coal seam is the waterproof coal-mining method of Main aquifer |
| CN109577980A (en) * | 2018-11-06 | 2019-04-05 | 中国矿业大学 | A kind of underground longwall working face water-protection coal-mining method freezed based on water-bearing layer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1763660A1 (en) * | 1980-05-14 | 1992-09-23 | В.Н.Канистеров, П.К.Кучеба, Ф.М.Киржнер, А.В.Пшеченко и Л.М.Смирнов | Method of working thick spontaneously combustible coal beds |
| CN110159267B (en) * | 2019-04-18 | 2020-06-02 | 中国矿业大学 | Water-bearing stratum sectional grouting curtain water-retention mining method |
-
2019
- 2019-04-18 CN CN201910312241.2A patent/CN110159267B/en active Active
- 2019-09-27 WO PCT/CN2019/108491 patent/WO2020211298A1/en active Application Filing
-
2020
- 2020-08-31 ZA ZA2020/05442A patent/ZA202005442B/en unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102505943A (en) * | 2011-11-21 | 2012-06-20 | 西安科技大学 | Water conservation coal cutting method for small and medium-sized coal mines in waterhead area |
| CN102865081A (en) * | 2012-04-28 | 2013-01-09 | 中国神华能源股份有限公司 | Water-preserved mining method |
| 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 |
| CN104775816A (en) * | 2015-02-27 | 2015-07-15 | 中国矿业大学 | Isolated grouting-filling mining method for overburden rock without village migration under cut-side local pressed-coal conditions |
| CN109139011A (en) * | 2018-08-02 | 2019-01-04 | 缪协兴 | A kind of coal seam is the waterproof coal-mining method of Main aquifer |
| CN109577980A (en) * | 2018-11-06 | 2019-04-05 | 中国矿业大学 | A kind of underground longwall working face water-protection coal-mining method freezed based on water-bearing layer |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020211298A1 (en) * | 2019-04-18 | 2020-10-22 | 中国矿业大学 | Water-conserving mining method employing segmented grout curtain for aquifer |
| CN114658485A (en) * | 2022-03-02 | 2022-06-24 | 中煤科工集团西安研究院有限公司 | Composite disaster treatment method for water damage and rock burst of thick and hard sandstone roof of coal mine |
| CN114658485B (en) * | 2022-03-02 | 2023-05-16 | 中煤科工集团西安研究院有限公司 | Composite disaster treatment method for water damage and rock burst of thick and hard sandstone roof of coal mine |
| CN115012933A (en) * | 2022-05-20 | 2022-09-06 | 安徽恒源煤电股份有限公司 | Zonal grouting construction method for stoping fault waterproof coal pillar |
| CN115012933B (en) * | 2022-05-20 | 2023-01-17 | 安徽恒源煤电股份有限公司 | Zonal grouting construction method for stoping fault waterproof coal pillar |
| 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 |
| CN115341902A (en) * | 2022-08-17 | 2022-11-15 | 中煤科工西安研究院(集团)有限公司 | Water-retaining coal mining method for lateral closed curtain of surrounding rock of coal mine working face |
| CN115341902B (en) * | 2022-08-17 | 2023-06-13 | 中煤科工西安研究院(集团)有限公司 | Coal mine working face surrounding rock lateral closed curtain water-retaining coal mining method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110159267B (en) | 2020-06-02 |
| ZA202005442B (en) | 2022-03-30 |
| WO2020211298A1 (en) | 2020-10-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110159267A (en) | A kind of water-bearing layer segmenting slip casting curtain water retaining mining method | |
| CN110761814B (en) | Roof water control method based on presplitting and grouting modification | |
| CN110242301B (en) | Two-step grouting modification water-retention coal mining method for roof aquifer | |
| CN108222938B (en) | Combined grouting filling mining method for large-inclination-angle coal seam goaf | |
| CN102080526B (en) | Method for extracting gas from bedding level fractured well of ground coal seam roof | |
| CN100560937C (en) | A kind of thin basic rock shallow buried coal seam longwall face water retaining exploitation method | |
| CN102705001B (en) | Isolated-section two-hole split-layer grouting filling well location method for mining overburden rock | |
| CN104314570B (en) | Long thick ore body Wall ore reclaims and the transitional exploitation method of open air trestle | |
| CN109577980B (en) | Underground longwall working face water-retaining coal mining method based on aquifer freezing | |
| CN103883304B (en) | A kind of gasifying underground coal method building gasification furnace passage | |
| CN102877857B (en) | Deep hole pre-grouting top plate reinforcement method for large-mining height working face under special geological conditions | |
| CN103510958B (en) | A kind of gentle dip super-high seam rock cross-cut coal uncovering | |
| CN111075478A (en) | Pre-grouting reinforcement process for ground construction of broken belt of excavation working face structure | |
| CN104100244A (en) | Well spacing method for coal bed gas communication well groups and application of well spacing method in fracturing yield increase | |
| CN106337685B (en) | A kind of coal and its association oil shale unitized production method | |
| CN105351001A (en) | Gas extraction method for region reinforcement of gob-side entry retaining | |
| CN106014412A (en) | Method for ladder-structured filling and re-mining of remnant coal pillar groups in remnant mining areas | |
| CN109882173A (en) | Big thick ore body vertically Two step mining stope filling system and placement method | |
| CN113063709A (en) | Method for determining curtain under complex aquifer condition | |
| CN104481555A (en) | Method of grouting and drilling construction by passing through weak surrounding rock | |
| CN102562069B (en) | The fluid-filled replacement exploitation in coal seam method on high artesian body | |
| CN113027522B (en) | Coal mine drainage same-layer recharging method | |
| CN201794573U (en) | Multi-lateral horizontal well system for coal bed gas | |
| CN115126506A (en) | Grouting transformation method for protecting coal pillar of fourth aquifer of liberation shallow part | |
| CN115467639A (en) | Water interception and emission reduction method for directionally exploring and blocking ground |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |