CN105840234A - Stack column type filling formwork and using method thereof - Google Patents
Stack column type filling formwork and using method thereof Download PDFInfo
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- CN105840234A CN105840234A CN201610270405.6A CN201610270405A CN105840234A CN 105840234 A CN105840234 A CN 105840234A CN 201610270405 A CN201610270405 A CN 201610270405A CN 105840234 A CN105840234 A CN 105840234A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000009415 formwork Methods 0.000 title abstract 6
- 241001669679 Eleotris Species 0.000 claims description 85
- 239000000463 material Substances 0.000 claims description 40
- 238000005065 mining Methods 0.000 claims description 21
- 239000004606 Fillers/Extenders Substances 0.000 claims description 12
- 239000003245 coal Substances 0.000 claims description 12
- 239000000945 filler Substances 0.000 claims description 11
- 239000010881 fly ash Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000007596 consolidation process Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000013521 mastic Substances 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- CBOCVOKPQGJKKJ-UHFFFAOYSA-L Calcium formate Chemical compound [Ca+2].[O-]C=O.[O-]C=O CBOCVOKPQGJKKJ-UHFFFAOYSA-L 0.000 claims description 4
- 239000011398 Portland cement Substances 0.000 claims description 4
- 229940044172 calcium formate Drugs 0.000 claims description 4
- 235000019255 calcium formate Nutrition 0.000 claims description 4
- 239000004281 calcium formate Substances 0.000 claims description 4
- 239000000395 magnesium oxide Substances 0.000 claims description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 4
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical group [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 4
- 230000000737 periodic effect Effects 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 239000002023 wood Substances 0.000 claims description 4
- 239000000440 bentonite Substances 0.000 claims description 3
- 229910000278 bentonite Inorganic materials 0.000 claims description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 3
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000004746 geotextile Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/02—Supporting means, e.g. shuttering, for filling-up materials
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Railway Tracks (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a stack column type filling formwork and a using method thereof. The stack column type filling formwork is arranged below a top plate, supporting frames spliced together define a cuboid frame structure on the periphery, single supporting frames or integrated bodies formed by single-side-spliced supporting frames are arranged on the two opposite faces of the formwork respectively, and every two adjacent faces are formed by perpendicularly splicing supporting frames at the edges. Each supporting frame is composed of a baffle, framework sleepers and counter-pulled anchor ropes, wherein the framework sleepers are composed of a plurality of parallel transverse sleepers and three parallel vertical sleepers, the transverse sleepers and the vertical sleepers are arranged in a perpendicularly crossing mode, and the counter-pulled anchor ropes are arranged on the vertical sleepers in the formwork center on each side. The framework sleepers make direct contact with the top plate after being spliced to support the top plate. A filling opening is formed in the upper portion of the part, on one side of the formwork, of the baffle. After filling of the formwork, the overall compressive strength of filling columns is improved, the later compression amount of the filling columns is reduced, and the top sinking amount is reduced.
Description
Technical field
The present invention relates to a kind of buttress pillar filling template and using method thereof, belong to Cut-and-fill Mining Technology field.
Background technology
In order to control ground settlement and the tradition coal-mining method infringement to environment that railways and water-bodies causes, coal mining company is near
Select over Nian and entirely adopted the filling method coal winning technology entirely filled.Ground settlement and environmental nuisance are achieved by this filling method coal winning technology
Well control effect, but there is also main not enough: one is because entirely adopting entirely filling and needs the amount of space of filling relatively large, fills
The underfill material contradiction that supply falls short of demand is the most prominent, and filling procedure material cost is higher；Two to be because filling operation amount relatively large,
Occupying the activity duration of normal coal mining operation, the original production efficiency of coal-face is greatly lowered.Therefore occur in that mined out
District's part filling coal mining method, to reduce filling operation amount and filler usage amount, reduces filling cost, improves production efficiency.
Goaf part placement method mainly includes strip-type part filling and pier stud type part filling, and strip-type filling is used just
Property filling slide plate special filling hydraulic support need to be coordinated to carry out sliding, to filling hydraulic support equipment require higher；Pier stud type filling
Multiplex flexible geotextiles antiseepage vacuum bag loads filler, and paste filling material mobility is strong, and shape is wayward, flexible
The yielding breakage of geotextiles antiseepage vacuum bag, causes filler to connect top rate the highest, it is impossible to controlroof deflection, later stage in early days
Intensity cannot guarantee that, not satisfactory to the control effect of goaf top plate.
Summary of the invention
It is desirable to provide a kind of buttress pillar filling template and using method thereof, it is particularly suited for pillar part filling mining.
A kind of buttress pillar filling template that the present invention provides, template-setup side under the top plate, surrounding is by the bracing frame being stitched together
Surround cuboid frame structure, relative two faces of template are respectively single bracing frames or through unilateral spliced some bracing frames
The entirety of composition, adjacent two faces are passed through vertically to splice composition by the bracing frame at edge；Every piece of bracing frame includes by baffle plate, bone
Frame sleeper and to drawing anchor cable to form, skeleton sleeper is made up of some parallel horizontal sleepers and three parallel vertical sleepers, horizontal
Perpendicular arranged in a crossed manner to sleeper and vertical sleeper, it is arranged on the vertical sleeper at each side template center drawing anchor cable；Skeleton road
Directly contact top board after wood splicing, top board is formed and supports；Baffle plate in template side is arranged over filling mouth.
In such scheme, described baffle plate is wood based panel, for enclosing filling cylinder, and thick 20-50mm, height determines with mining height,
Length determines according to the size of filling cylinder；The column filling cylinder that filling cylinder is formed after referring to filling, it is possible to be referred to as packed column
Pillar body；
When filling cylinder one side size is within 3m, baffle dimensions is equal to filling cylinder one side size；When filling cylinder is unilateral
When size is more than 3m, after filling template segment design can be become some pieces of little bracing frames, carry out unilateral splicing again；Surrounding supports
After frame vertically splices, shape is regular, indeformable not spillage, baffle interior filling expansion filler, improves material consolidation and is followed by
Top rate.
In such scheme, described skeleton sleeper is mining sleeper, is quadrangular structure, and skeleton sleeper is parallel horizontal by some
Sleeper and three parallel vertical sleeper compositions, horizontal sleeper and vertical sleeper are perpendicular arranged in a crossed manner, and sleeper cross section is that the length of side is
The square of 100-200mm, the width of 100-300mm is respectively extended at horizontal sleeper two ends than baffle plate two ends, it is simple to different templates
Splicing assemble, vertical sleeper height is identical with the height of baffle plate；Laterally sleeper and vertical sleeper are fixed on gear by steel nail respectively
On plate, it is main force structure, directly top board and packed column body can be formed after splicing and support.
In such scheme, described splicing refers to the splicing between bracing frame, is divided into unilateral parallel splicing and vertical splicing, during design
By the horizontal skeleton sleeper interlaced arrangement of adjacent supports frame so that splicing；Unilateral parallel splicing refers to when filling cylinder one side length
During more than 3m, the horizontal skeleton sleeper that bracing frame is extended out mutually intert complete under the vertical sleeper of adjacent supports frame spell
Connecing, some bracing frames are joined together to form a long overall structure, its length is equal with the length of filling cylinder；Vertically
Splicing refers to the splicing of different side stand components, the horizontal interlaced overlap joint of skeleton sleeper that now adjacent supports frame extends out, four
With to drawing anchor cable applying pretightning force to be fixed after being fully completed splicing week.
In such scheme, described is mining steel strand anchor cable to drawing anchor cable, depending on length is with the overall dimensions of template, two ends respectively to
150-300mm is extended, in order to apply pretightning force outside bracing frame, to drawing anchor cable to be fixed on the vertical sleeper of template center,
Coordinate skeleton sleeper to provide lateral pressure for filling cylinder, improve filling cylinder comprcssive strength, reduce filling cylinder later stage decrement.
In such scheme, described filling mouth is circular hole, and a diameter of 10-20cm of filling mouth is positioned at the top of filling template, fills
Complete into rear enclosed filling mouth.
Typically, the width in underground transportation tunnel is 3～5m.
The invention provides the using method of described buttress pillar filling template, comprise the following steps:
(1) calculate first or periodic caving step pitch according to engineering specifications, and application safety Y-factor method Y and branch road area allotment method determine
Filling spacing and filling cylinder sizes；
(2) according to filling cylinder size design filling template length: when filling cylinder one side size is within 3m, baffle plate chi
Very little equal to filling cylinder sizes；When filling cylinder one side size is more than 3m, filling template segment design can be become some pieces little
Bracing frame after splice, form height determines with mining height；
(3) the filling bracing frame made is transported to filling operation face by mine materials transportation system, along with the shifting of filling support
Dynamic, under the protection of gib, bracing frame is installed splicing in the position of filling cylinder design, with to drawing anchor cable to fix, and to
Certain pretightning force is applied to drawing anchor cable；Fix after the splicing of grillage and also can use sleeper lateral support；
(4) complete when surrounding template splicing, filling operation can be carried out, can be selected for dilatancy filler, solid to improve material
Top rate is connect after knot；Top board is directly formed and supports by filling template skeleton sleeper, controlroof deflection；
Described dilatancy filler is containing bentonitic paste filling material, and the mass concentration of mastic is 70～75%, and remaining is
Water；Described paste filling material is made up of the raw material of following quality proportioning: cementitious matter: bentonite: gangue: flyash is 1:
0.6∶3∶4；
Or, described dilatancy filler is the paste filling material containing extender, and the mass concentration of mastic is 78～82%,
Remaining is water；Described paste filling material is made up of the raw material of following mass percent: cementing material 15%, flyash 20%,
Gangue 45%, water 20%, wherein cementing material be by Portland cement 85～90%, calcium formate 2～5%,
Extender 8～10% is uniformly mixed, and described extender is magnesium oxide.
(5) after filling operation completes, the reach coal cutting of filling hydraulic support, repetition step (3) when advancing to next filling position,
(4)。
In above-mentioned using method, described splicing the skeleton sleeper of baffle plate will mutually intert combination, then with to drawing anchor cable to fix；Spell
Connect and be divided into one side to splice, vertically splice, may also set up lateral support sleeper after having spliced and provide lateral support to template；Also may be used
Replace drawing anchor cable to provide lateral support with lateral support sleeper.
Beneficial effects of the present invention:
(1) simple in construction, material enriches, and filling hydraulic support is required relatively low by low cost；
(2) height and width can customize by engineering requirements, transport, easy for installation；The splicing of skeleton sleeper is convenient, can be unilateral
Splicing and vertical splicing, can be formed after splicing and support top board offer from steady structure, reduce the amount of crushing；
(3) wooden baffle plate makes packed column make packed column even structure smooth, unstressed concentration zones, and even intensity is reliable, and cooperation makes
Improve material with expansion filling material and connect top rate；
(4) template packed column body need not reclaim after forming intensity, reduces form removal workload, and as long-term supporting to drawing anchor cable
Effect under make filling cylinder be in three-dimensional stress state, can improve the compressive property of filling cylinder, reduce filling cylinder later stage pressure
Contracting amount, the comprehensive raising pillar filling control effect to the amount of crushing.
Accompanying drawing explanation
Fig. 1 is that buttress pillar filling template is positioned at the schematic diagram (overlooking downwards from top board) below top board.
Fig. 2 is the vertical spliced map of buttress pillar filling template.
Fig. 3 is the structure chart of bracing frame.
Fig. 4 is the left view of Fig. 3.
Fig. 5 is the structure chart of the bracing frame forming unilateral parallel splicing with Fig. 3 bracing frame.
Fig. 6 is the structural representation that bracing frame shown in Fig. 3 and Fig. 5 carries out unilateral parallel splicing.
Fig. 7 is lateral sleeper holding state schematic diagram.
Fig. 8 is goaf layout drawing.
Wherein: 1, baffle plate；2, skeleton sleeper；3, to drawing anchor cable；4, filling mouth；5, lateral support sleeper；6, fill
Mold filling plate；7, unfilled template；8, filling hydraulic support；9, coal body is unminded.
Detailed description of the invention
Further illustrate the present invention below by embodiment, but be not limited to following example.
As shown in figs. 1 to 6, a kind of buttress pillar filling template, template-setup side under the top plate, surrounding is by the support being stitched together
Frame surrounds cuboid frame structure, relative two faces of template is respectively single bracing frame or through unilateral spliced some supports
The entirety of frame composition, adjacent two faces are passed through vertically to splice composition by the bracing frame at edge；Every piece of bracing frame include by baffle plate 1,
Skeleton sleeper 2 and to drawing anchor cable 3 to form, skeleton sleeper is by the parallel vertical sleeper group of some parallel horizontal sleepers and three
Becoming, horizontal sleeper and vertical sleeper are perpendicular arranged in a crossed manner, are arranged on the vertical sleeper at each side template center drawing anchor cable；
Directly contact top board after the splicing of skeleton sleeper, top board is formed and supports；Baffle plate in template side is arranged over filling mouth 4.
In such scheme, described baffle plate 1 is wood based panel, for enclosing filling cylinder, and thick 20-50mm, height determines with mining height,
Length determines according to the size of filling cylinder；The column filling cylinder that filling cylinder is formed after referring to filling, it is possible to be referred to as packed column
Pillar body；
When filling cylinder one side size is within 3m, baffle dimensions is equal to filling cylinder one side size；When filling cylinder is unilateral
When size is more than 3m, after filling template segment design can be become some pieces of little bracing frames, carry out unilateral splicing (see Fig. 6) again；
After surrounding bracing frame vertically splices, shape is regular, indeformable not spillage, baffle interior filling expansion filler, improves material
Consolidation is followed by top rate.
In such scheme, described skeleton sleeper 2 is mining sleeper, is quadrangular structure, and skeleton sleeper is by some parallel horizontal strokes
To the vertical sleeper composition that sleeper and three are parallel, horizontal sleeper and vertical sleeper are perpendicular arranged in a crossed manner, and sleeper cross section is the length of side
For the square of 100-200mm, the width of 100-300mm is respectively extended at horizontal sleeper two ends than baffle plate two ends, it is simple to different
The splicing of template assembles, and vertical sleeper height is identical with the height of baffle plate；Laterally sleeper and vertical sleeper are fixed by steel nail respectively
On baffle plate, it is main force structure, directly top board and packed column body can be formed after splicing and support.
In such scheme, described splicing refers to the splicing between bracing frame, is divided into unilateral parallel splicing (see Fig. 6) and vertical splicing
(state as shown in Figure 2), by the horizontal skeleton sleeper interlaced arrangement of adjacent supports frame so that splicing during design；Unilateral parallel spelling
Connect and refer to that the horizontal skeleton sleeper extended out by bracing frame mutually interts into adjacent when filling cylinder one side length is more than 3m
Complete splicing under the vertical sleeper of bracing frame, some bracing frames be joined together to form a long overall structure, its length with
The length of filling cylinder is equal；Vertical splicing refers to the splicing of different side stand components, now adjacent supports frame extend out horizontal
The interlaced overlap joint of skeleton sleeper, surrounding be fully completed splicing after with to draw anchor cable apply pretightning force be fixed.
In such scheme, described to drawing anchor cable 3 for mining steel strand anchor cable, depending on length is with the overall dimensions of template, two ends are each
150-300mm is extended, in order to apply pretightning force outside bracing frame, to drawing anchor cable to be fixed on the vertical sleeper of template center,
Coordinate skeleton sleeper to provide lateral pressure for filling cylinder, improve filling cylinder comprcssive strength, reduce filling cylinder later stage decrement.
In such scheme, described filling mouth 4 is circular hole, and a diameter of 10-20cm of filling mouth is positioned at the top of filling template,
Filling completes rear enclosed filling mouth.
Fig. 7 shows that lateral support sleeper 5 supports the state of buttress pillar filling template.
Fig. 8 is to use the present invention to pile up neatly pillar filling template to carry out the layout drawing of filling, and concrete stowing operation enters one by following embodiment
Step explanation.
Embodiment 1:
1. when top plate thickness more than 5m, intensity more than 100MPa and integrity preferable time, according to engineering specifications calculate collapse for the first time
Fall step pitch L1, and application safety Y-factor method Y and branch road area allotment method determine filling spacing L' and filling cylinder (for cube structure)
Length of side a；Wherein:L'=L1-a, h are immediate roof thickness, RTDraw for directly offending and disobeying with rude remarks
Intensity, q is directly to push up overlying load, fcuFor filling cylinder comprcssive strength, k1、k2For safety coefficient；The most calculated
Filling spacing L1Relatively big, filling cylinder sizes a is relatively big, and unilateral length is generally higher than 3m；
2. design filling template length a' according to filling cylinder sizes a, when filling cylinder one side size is more than 3m, by filling
Carrying out unilateral splicing after template segment design, form height determines with mining height；
3. the filling bracing frame made is transported to filling operation face by mine materials transportation system, along with the movement of filling support,
Bracing frame is carried out unilateral splicing and vertical splicing in the position of filling cylinder design, after having spliced under the protection of gib
With to drawing anchor cable to fix, and to the pretightning force drawing anchor cable to apply 10-50kN；
4. fixed when surrounding template splicing, filling operation can have been carried out；Now, filling template skeleton sleeper is directly to top board
Formed and support, controlroof deflection；Select mixed with bentonitic paste filling material (wherein: cementitious matter: swelling during filling
Soil: gangue: flyash is 1: 0.6: 3: 4, the mass concentration of mastic is 72%), to connect top rate after improving material consolidation.
5. after filling operation completes, the reach coal cutting of filling hydraulic support, repeats step 3 and 4 when advancing to next filling position.
Embodiment 2:
1., when top plate thickness is poor less than 100MPa, integrity less than 5m, intensity, calculate periodic caving according to engineering specifications
Step pitch L2, and application safety Y-factor method Y and branch road area allotment method determine filling spacing L' and filling cylinder (for cube structure)
Length of side a；Wherein:L'=L2-a, h are immediate roof thickness, RTDraw for directly offending and disobeying with rude remarks
Intensity, q is directly to push up overlying load, fcuFor filling cylinder comprcssive strength, k1、k2For safety coefficient；The most calculated
Filling spacing L' is less, and filling cylinder sizes a is less, and unilateral length is usually no more than 3m；
2. designing filling template length a' according to filling cylinder sizes a, form height determines with mining height；
3. the filling bracing frame made is transported to filling operation face by mine materials transportation system, along with the movement of filling support,
Bracing frame is vertically spliced under the protection of gib in the position of filling cylinder design, with to drawing anchor cable after having spliced
Fixing, and to the pretightning force drawing anchor cable to apply 10-50kN；
4. spliced when four cheek boards, filling operation can have been carried out, selected containing bentonitic paste filling material during filling,
Wherein: cementitious matter: bentonite: gangue: flyash is 1: 0.6: 3: 4, the mass concentration of fill paste is 72%, with
Improve material consolidation after connect top rate；Top board is directly formed and supports by filling template skeleton sleeper, controlroof deflection.
5. after filling operation completes, filling hydraulic support reach coal cutting, when advancing to next filling position repeat step 3,4.
Embodiment 3:
1. when top plate thickness more than 5m, intensity more than 100MPa and integrity preferable time, according to engineering specifications calculate collapse for the first time
Fall step pitch L, and application safety Y-factor method Y and branch road area allotment method determine filling spacing L' and filling cylinder (for cube structure)
Length of side a；Wherein:L'=L1-a；H is immediate roof thickness, RTDraw for directly offending and disobeying with rude remarks
Intensity, q is directly to push up overlying load, fcuFor filling cylinder comprcssive strength, k1、k2For safety coefficient；The most calculated
Filling spacing L is relatively big, and filling cylinder sizes a is relatively big, and unilateral length is generally higher than 3m；
2. design filling template length a' according to filling cylinder sizes a, when filling cylinder one side size is more than 3m, by filling
Carrying out unilateral splicing after template segment design, form height determines with mining height；
3. the filling bracing frame made is transported to filling operation face by mine materials transportation system, along with the movement of filling support,
Under the protection of gib, bracing frame is carried out unilateral splicing and vertical splicing, bracing frame surrounding in the position of filling cylinder design
Sleeper lateral support is used after splicing is fixing；
4. fixed when four cheek board splicings, filling operation can have been carried out；Now, filling template skeleton sleeper is directly to top board
Formed and support, controlroof deflection；Selecting the paste filling material containing extender during filling, proportioning is cementing material 15%,
Flyash 20%, gangue 45%, water 20%, wherein cementing material is by Portland cement 88%, calcium formate 3%,
Extender 9% is uniformly mixed, and described extender is magnesium oxide, and the mass fraction of mastic is 80%, after improving material consolidation
Connect top rate.
5. after filling operation completes, filling hydraulic support reach coal cutting, when advancing to next filling position repeat step 3,4.
Embodiment 4:
1., when top plate thickness is poor less than 100MPa, integrity less than 5m, intensity, calculate periodic caving according to engineering specifications
Step pitch L1, and application safety Y-factor method Y and branch road area allotment method determine filling spacing L' and filling cylinder (for cube structure)
Length of side a；Wherein:L'=L2-a, h are immediate roof thickness, RTDraw for directly offending and disobeying with rude remarks
Intensity, q is directly to push up overlying load, fcuFor filling cylinder comprcssive strength, k1、k2For safety coefficient；The most calculated
Filling spacing L ' less, filling cylinder sizes a is less, and unilateral length is usually no more than 3m；
2. designing filling template length a' according to filling cylinder sizes a, form height determines with mining height；
3. the filling bracing frame made is transported to filling operation face by mine materials transportation system, along with the movement of filling support,
Bracing frame is vertically spliced under the protection of gib in the position of filling cylinder design, after the splicing of bracing frame surrounding is fixing
Use sleeper lateral support；
4. spliced when four cheek boards, filling operation can have been carried out, during filling, selected the paste filling material containing extender,
Each constituent mass percentage ratio is: cementing material 15%, flyash 20%, gangue 45%, water 20%, wherein cementing material is
By Portland cement 85%, calcium formate 5%, extender 10% is uniformly mixed, and described extender is magnesium oxide, cream
The mass fraction of body is 80%, with improve material consolidation after connect top rate；Top board is directly formed and supports by filling template skeleton sleeper,
Controlroof deflection.
5. after filling operation completes, filling hydraulic support reach coal cutting, when advancing to next filling position repeat step 3,4.
Claims (10)
1. a buttress pillar filling template, it is characterized in that: template-setup side under the top plate, surrounding is surrounded cuboid frame structure by the bracing frame being stitched together, being single bracing frame or the entirety through unilateral spliced some bracing frames composition respectively on relative two faces of template, adjacent two faces are passed through vertically to splice composition by the bracing frame at edge；Every piece of bracing frame includes by baffle plate, skeleton sleeper with to drawing anchor cable to form, skeleton sleeper is made up of some parallel horizontal sleepers and three parallel vertical sleepers, laterally sleeper and vertical sleeper are perpendicular arranged in a crossed manner, are arranged on the vertical sleeper at each side template center drawing anchor cable；Directly contact top board after the splicing of skeleton sleeper, top board is formed and supports；Baffle plate in template side is arranged over filling mouth.
Buttress pillar filling template the most according to claim 1, it is characterised in that: described baffle plate is wood based panel, and thickness is 20-50mm, and height determines with mining height, and length determines according to the size of filling cylinder.
Buttress pillar filling template the most according to claim 1, it is characterized in that: described skeleton sleeper is mining sleeper, it it is quadrangular structure, sleeper cross section be the length of side be the square of 100-200mm, laterally the width of 100-300mm is respectively extended at sleeper two ends than baffle plate two ends, the splicing being easy to different templates assembles, and vertical sleeper height is identical with the height of baffle plate；Laterally sleeper and vertical sleeper are fixed on baffle plate by steel nail respectively, directly form top board and packed column body and support after splicing.
Buttress pillar filling template the most according to claim 1, it is characterised in that: described splicing refers to the splicing between bracing frame, is divided into one side splicing and vertical splicing, by the horizontal skeleton sleeper interlaced arrangement of adjacent supports frame so that splicing during design；Unilateral splicing refers to when filling cylinder one side length is more than 3m, the horizontal skeleton sleeper that bracing frame is extended out mutually intert complete under the vertical sleeper of adjacent supports frame splicing, some bracing frames are joined together to form a long overall structure, and its length is equal with the length of filling cylinder；Vertical splicing refers to the splicing of the adjacent supports frame of different side template, the horizontal interlaced overlap joint of skeleton sleeper that now adjacent supports frame extends out, surrounding be fully completed splicing after with being fixed drawing anchor cable to apply pretightning force.
Buttress pillar filling template the most according to claim 1, it is characterized in that: described is mining steel strand anchor cable to drawing anchor cable, depending on length is with the overall dimensions of template, 150-300mm is respectively extended at two ends outside template, to drawing anchor cable to be fixed on the vertical sleeper of template center, skeleton sleeper is coordinated to provide lateral pressure for filling cylinder.
Buttress pillar filling template the most according to claim 1, it is characterised in that: described filling mouth is circular hole, a diameter of 10-20cm of filling mouth, is positioned at the baffle plate top of the top of filling template, and filling completes rear enclosed filling mouth.
7. the using method of the buttress pillar filling template described in an any one of claim 1 ~ 6, it is characterised in that: comprise the following steps:
(1) calculate first or periodic caving step pitch according to engineering specifications, and application safety Y-factor method Y and branch road area allotment method determine filling spacing and filling cylinder sizes；
(2) according to filling cylinder size design filling template length: when filling cylinder one side size is within 3m, baffle dimensions is equal to filling cylinder sizes；When filling cylinder one side size is more than 3m, can splice after filling template segment design becomes some pieces of little bracing frames, form height determines with mining height；
(3) the filling bracing frame made is transported to filling operation face by mine materials transportation system; movement along with filling support; under the protection of gib, bracing frame is installed splicing in the position of filling cylinder design, with to drawing anchor cable to fix, and to drawing anchor cable to apply certain pretightning force；
(4) complete when surrounding template splicing, select dilatancy filler carry out filling operation, with improve material consolidation after connect top rate；Top board is directly formed and supports by filling template skeleton sleeper, controlroof deflection；
(5) after filling operation completes, the reach coal cutting of filling hydraulic support, repeats step (3), (4) when advancing to next filling position.
The using method of buttress pillar filling template the most according to claim 7, it is characterised in that: support frame as described above uses lateral support sleeper to provide lateral support after having spliced.
The using method of buttress pillar filling template the most according to claim 7, it is characterised in that: described dilatancy filler is containing bentonitic paste filling material, and the mass concentration of mastic is 70 ~ 75%, and remaining is water；Described paste filling material is made up of the raw material of following quality proportioning: cementitious matter: bentonite: gangue: flyash is 1: 0.6: 3: 4.
The using method of buttress pillar filling template the most according to claim 7, it is characterised in that: described dilatancy filler is the paste filling material containing extender, and the mass concentration of mastic is 78 ~ 82%, and remaining is water；Described paste filling material is made up of the raw material of following mass percent: cementing material 15%, flyash 20%, gangue 45%, water 20%, wherein cementing material is to be uniformly mixed by Portland cement 85～90%, calcium formate 2～5%, extender 8～10%, and described extender is magnesium oxide.
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| CN113339055A (en) * | 2021-06-07 | 2021-09-03 | 太原理工大学 | Filling body pouring and curing device and using method thereof |
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| CN105840234B (en) | 2017-12-05 |
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