CN104712348B - Large-mining-height working surface is along empty fender laneway support method under the hard direct top of one kind - Google Patents
Large-mining-height working surface is along empty fender laneway support method under the hard direct top of one kind Download PDFInfo
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- CN104712348B CN104712348B CN201410755207.XA CN201410755207A CN104712348B CN 104712348 B CN104712348 B CN 104712348B CN 201410755207 A CN201410755207 A CN 201410755207A CN 104712348 B CN104712348 B CN 104712348B
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000003245 coal Substances 0.000 claims abstract description 47
- 239000011435 rock Substances 0.000 claims abstract description 22
- 238000010276 construction Methods 0.000 claims abstract description 10
- 230000008093 supporting effect Effects 0.000 claims abstract description 10
- 238000005452 bending Methods 0.000 claims abstract description 4
- 230000006378 damage Effects 0.000 claims description 16
- 230000002708 enhancing effect Effects 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 4
- 230000000737 periodic effect Effects 0.000 claims description 4
- 230000000630 rising effect Effects 0.000 claims description 4
- 239000010878 waste rock Substances 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims 1
- 238000005065 mining Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 150000001875 compounds Chemical class 0.000 abstract 2
- 239000002131 composite material Substances 0.000 abstract 1
- 238000010008 shearing Methods 0.000 abstract 1
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000009172 bursting Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 208000002193 Pain Diseases 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention discloses large-mining-height working surfaces under a kind of hard direct top along empty fender laneway support method, it is characterised in that: and first, the extensible bolting is carried out with anchor pole is lengthened to roadway's sides coal wall；Second, anchor pole cut using resistance to the shoulder top plate close to roadway's sides coal wall and resistance cuts anchor cable and carries out composite support, anchor pole is cut using resistance and resistance cuts the resistance of anchor cable and cuts pipe and constrain the shearing force between shoulder roof strata level or crack；Roof, soft rock roadway or compound roof are anchored on tight roof in the middle part of tunnel using high-strength anchor cable, reduce its curvature, prevent bending failure by third.The present invention uses the anchor pole of different performance according to the deformation behaviour of tunnel different parts, and construction is simple, conveniently, speed of application is fast, work efficiency is high, the control effect of soft rock roadway, compound roof and breaking roof when to deep mining is good, and the bearing capacity of supporting construction is strong, and repair of laneway rate is lower.
Description
Technical field
The present invention relates to coal mine roadway maintenance and along empty fender stable problem, and in particular to big under the hard direct top of one kind
Height mining face is along empty fender Roadway Support Technology.
Background technique
After upper curtate working face mining, the property of the formation of gob side entry position overburden structure and roof strata,
Thickness and mining height are related.Under the conditions of thick seam large mining high hard direct top, through being commonly formed above fender gob side entry top plate
Fault block A, B, C hinged structural system as shown in Fig. 1, one end is on gob side entry top plate after fault block B revolution
Side is hinged with fault block A, and fault block C articulated structure of the other end in goaf touching cash, with goaf is formed relatively stable
Masonry girder construction.When overburden structure when masonry girder construction and thereon keeps stablizing, top board structure is by whole top plates
Load transmission gives tunnel entity coal side coal body, makes to subject high-intensitive support pressure in its large area, needs to reinforce propping up to it
Shield；When articulated structure is destroyed between fault block, the stability along empty fender will be destroyed, so that gob side entry is shown as
Back uneven subsidence, the broken destruction of rising of coal column, two help to shift near, Floor Heave in Roadway, need to closing along empty fender and thereon
Key fault block B carries out supporting, to ensure gob side entry and the stabilization along empty coal column.
Summary of the invention
In order to solve the above technical problems, the present invention provides one kind for large-mining-height working surface under hard direct top along empty small coal
Column laneway support method uses six measures prevention tight roof fault blocks to the shadow along empty fender stability by comprehensive
It rings, compared with prior art, has the advantages that supporting intensity is high, supporting effect is good, at low cost.
In order to achieve the above objectives, the present invention uses following technological means:
Large-mining-height working surface is along empty fender laneway support method under the hard direct top of one kind, it is characterized in that: by following
What step was realized:
For the mutual articulated structure of the hard directly top fault block A of fender gob side entry, fault block B and fault block C, with hard
Directly pushing up geosutures --- the hinge lines of fault block A and fault block B are that bound pair back load carries out unbalanced support:
The top plate on construction shield top enhances anchor pole on the top plate of geosutures two sides, is stinging hard direct top fault block A and fault block B
Rock mass near chalaza is in triaxial stress state, it is ensured that fault block B, fault block A keep stable hinged relationship on geosutures；
The suspention anchor cable for certain density of constructing along the top plate of sky side in hard direct top geosutures, above empty fender
Hard direct top fault block B be suspended in and cover on base object model rock stratum, fault block B is to along empty small coal after preventing articulated structure accidental destruction
The generation of column destroys；
The combination of steel rope for certain density of constructing on hard direct top geosutures fault block A entity coal side top plate, by entity coal
The hard fault block A combination in side is integral, avoids geosutures biting point vertical load to the bending of fault block A, the destruction of absciss layer；
It is given along empty fender using fender enhancing anchor pole with enough horizontal anchor forces, so that hard direct top thereon
Fault block load is in balance in the various mechanical relationships formed along empty fender internal crack face；
Using along empty fender bottom positioning anchor cable, along empty fender top positioning anchor cable heavily fortified point will be fixed on along empty fender
It resists stubbornly between plate and seat earth, it is flat with the anchor force of positioning anchor cable and the horizontal thrust of the broken generation of rising of filing gangue in mined-out area
Weighing apparatus prevents from moving along empty fender entirety into tunnel, and generates floor lift in gallery phenomenon；
Using the method for lateral wall anchor pole, lateral wall anchor cable coupling supporting, the destruction that its high bearing pressure helps tunnel coal is balanced
Effect.
Further, shield top anchor pole uses overall length bond-anchorage, provides enough just anchor-holds to hard directly top.
Further, positioning anchor cable is constructed according to the elevation angle at the top of empty fender, is deep into hard direct top fault block B(8)
1m or more in rock stratum；It is constructed along empty fender bottom positioning anchor cable using the angle of depression, is deep into 1m or more in floor strata.
Further, the load and support density calculation method that suspention anchor cable is born: hinge joint is along empty side roadway direction list
The load Q that anchor cable is born on bit length is the half of fault block B gravity, i.e., are as follows:
In formula: the load that anchor cable is born in Q-roadway direction unit length, kN/m；
L-upper curtate roof periodic water component, m；
The hard immediate roof thickness of h-, m；
The body force of the hard direct rimrock layer of γ-, kN/m3；
S-upper curtate face length, m；
Hinge joint is along empty side, it is ensured that hard direct top fault block B stablizes the cable bolting density along roadway direction and is
In formula: the load that anchor cable is born in n-roadway direction unit length, kN/m；
Q0The ultimate load of-single anchor cable, kN/m.
The working principle and beneficial effect of the invention are shown: being directed to the hard direct top of fender gob side entry
The physical condition of fault block A, fault block B and the mutual articulated structure of fault block C, with it is hard directly push up geosutures (fault block A and fault block B's
Hinge lines) it is that bound pair back load carries out unbalanced support.The lateral wall coal body of tunnel entity coal side is arrying main body, is held
Carry on a shoulder pole the entire overlying rock mechanical balance structure in upper curtate goaf and the hard direct load pushing up fault block and transmitting by hinge joint
Summation；Tunnel along empty side the above-mentioned load for not undertaking upper curtate goaf top plate generally along empty fender, only when hard
Directly top fault block just bears hard direct top above back in the case where hinge de- with the hard directly top in entity coal side
Fault block transmitting fractional load, ordinary circumstance lower edge sky fender only undertake upper curtate filing gangue in mined-out area it is broken swollen when level
Thrust load.
The top plate on construction shield top enhances anchor pole on the top plate of geosutures two sides, is being engaged hard direct top fault block and fault block
Rock mass near point is in triaxial stress state, improves its force environment, improves its anti-extrusion intensity, and then safeguard gob side entry
The hard stability directly withstood near geosutures prevents the hard direct top near biting point from being squeezed by powerful horizontal compression
It is bad, it is ensured that two fault blocks keep stable hinged relationship on geosutures.
The suspention anchor cable for certain density of constructing along the top plate of sky side in hard direct top geosutures, above empty fender
Hard direct top fault block be suspended in and cover on base object model rock stratum, prevent hard direct top fault block pair after articulated structure accidental destruction
Generation along empty fender destroys.
The combination of steel rope for certain density of constructing on hard direct top geosutures entity coal side top plate, entity coal side is hard
Directly top combination is integral, avoids geosutures biting point plummet load to the hard bending directly pushed up, the destruction of absciss layer.
It is given along empty fender using fender enhancing anchor pole with enough horizontal anchor forces, so that hard direct top thereon
Various mechanical relationships that fault block load is formed on fissure-plane inside the fender body are in balance, prevent in small coal body fissure-plane it
Between generate the changing of the relative positions, whereby keep fender body it is steady in a long-term.Having along empty fender hard straight after enhancing bolt anchorage
Connect the top hinged instability status lower support of the fault block hard direct ability for pushing up fault block weight 2/3rds thereon, it is ensured that when along empty small coal
It, will not be super because of it along empty fender when the hard directly top of the hard directly top fault block in column top and tunnel entity coal side surprisingly takes off hinge
Load is destroyed.
It will be fixed between tight roof and seat earth along empty fender using positioning anchor cable, with the anchoring of positioning anchor cable
Power and the horizontal thrust of the broken generation of rising of filing gangue in mined-out area balance, and prevent from moving along empty fender entirety into tunnel, and generate
Floor lift in gallery phenomenon.Top positioning anchor cable is constructed according to the elevation angle, is deep into 1m or more in hard direct top fault block rock stratum；Lower part is fixed
Position anchor cable is constructed using the angle of depression, is deep into 1m or more in floor strata.
The entire overlying rock mechanical balance structure in upper curtate goaf is born on a large scale for tunnel entity coal lateral wall coal body
Fault block load, the high feature of support pressure intensity, using the side of lateral wall anchor pole, lateral wall anchor cable coupling supporting are directly pushed up with hard
Method balances the destruction that its high bearing pressure helps tunnel coal.
Shield top anchor pole should use overall length bond-anchorage, provide enough just anchor-holds to hard directly top.
Hinge joint outer sky side suspends the load that anchor cable is born in midair and support density calculating is as follows: hinge joint is along empty side tunnel side
The load Q that anchor cable is born in unit length is the half of fault block B gravity, i.e., are as follows:
In formula: the load that anchor cable is born in Q-roadway direction unit length, kN/m；
L-upper curtate roof periodic water component, m；
The hard immediate roof thickness of h-, m；
The body force of the hard direct rimrock layer of γ-, kN/m3；
S-upper curtate face length, m；
Hinge joint is along empty side, it is ensured that hard direct top fault block B stablizes the cable bolting density along roadway direction and is
In formula:
The load that anchor cable is born in n-roadway direction unit length, kN/m；
Q0The ultimate load of-single anchor cable, kN/m.
Enhancing anchor pole along empty fender perpendicular to upper uses overall length bond-anchorage, provides enough water to fender
Flat just anchor-hold.
The working principle of the invention and beneficial effect are shown:
The present invention is with traditional laneway support method main difference is that comprehensive prevent tight roofs from breaking using six measures
Block is to the influence along empty fender stability:
Measure first is that on the top plate of geosutures two sides construct top plate enhance anchor pole, keep hard direct top fault block biting point attached
Close rock mass is in triaxial stress state, improves its force environment, improves its anti-extrusion intensity, and then safeguards that gob side entry is hard
The stability near geosutures is directly withstood on, prevents the hard direct top near biting point from being squeezed by powerful horizontal compression bad；
Measure is second is that in the disconnected hinged place of hard direct bursting along empty side using suspention anchor cable, by the direct top above fender
Fault block, which is suspended in, to be covered in base object model rock stratum, solves hard directly top fault block after hinge joint accident unstability to steady along empty fender
Qualitatively influence；
Measure is third is that break hinge joint entity coal side using combination reinforcement anchor cable in hard direct bursting, solution tight roof is disconnected
The problem of absciss layer, bending-buckling, occurs under hinge joint extruding force and vertical force comprehensive function for block, protects the hinge between adjacent fault block
The stabilization of binding structure；
Measure fourth is that enhance anchor pole using fender, provide enough horizontal anchor forces to along empty fender, prevent coal
The changing of the relative positions is generated between internal fissure-plane, avoiding coal column from generating, destructiveness is broken to rise, and keeps its long-term stabilization；
Measure fifth is that using positioning anchor cable will be fixed between tight roof and seat earth along empty coal column, prevent coal column whole
It is moved in body is horizontal；
Measure helps large area by the entire overlying rock mechanical balance in upper curtate goaf sixth is that being directed to tunnel entity coal
The region of structure and hard directly top fault block load effect balances high bearing using the coupling supporting of coal side anchor pole and side anchor cable
The destruction that pressure helps tunnel coal.
By the implementation of six measures, stable mechanical structure is formd above gob side entry top plate, prevents area
Influence of the section goaf top plate fault block to gob side entry and fender, realizes the unbalanced support of tunnel two sides top plate, protects
Along the stability of empty fender.
Detailed description of the invention
Fig. 1 is the invention supporting construction schematic diagram；1. gob side entry；2. along empty fender；3. fender bottom
Position anchor cable；4. goaf；5. fender enhancing side anchor pole；6. positioning anchor cable at the top of fender；7. fault block C；8. fault block B；9.
Top plate enhances anchor pole；10. suspending anchor cable in midair；11. combination of steel rope；12. fault block A；13. base object model rock stratum is covered on；14. lateral wall anchor
Bar；15. lateral wall anchor cable；16. entity coal lateral wall coal body.
Specific embodiment
The relevant technologies content that do not address below can be used or use for reference the prior art.
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common
The application protection all should belong in technical staff's every other embodiment obtained without making creative work
Range.
In process of coal mining, the directly top on gob side entry 1 forms three after being broken according to the position of exploitation
Fault block: it directly top fault block A12, directly pushes up fault block B8, directly push up fault block C7；Three positional relationships are as shown in Figure 1.
It is above to cover base object model rock stratum 13 above direct top.
Upper curtate goaf, hard fault block (directly top fault block C7, fault block B8, fault block A12 etc.), on cover basic rimrock
Layer 13 and the top plate of tunnel entity coal side form semi-arched masonry beam sillar articulated structure.
Tunnel entity coal lateral wall coal body 16 is the high arch springing of semi-arched masonry beam, is the arrying main body of semi-arched masonry beam,
Carry upper curtate goaf it is entire on cover 13 mechanical balance structure of base object model rock stratum and hard direct top fault block B8 passes through hinge
The load summation of contact transmitting.
Tunnel 1 does not undertake the above-mentioned load of upper curtate goaf top plate generally along empty side along empty fender 2, only when
In the case that hard directly top fault block B8 directly push up that fault block A12 is de- to be cut with scissors above back with entity coal side, just hold
By the fractional load that hard directly top fault block B8 is transmitted, ordinary circumstance lower edge sky fender 2 only undertakes the filling waste rock in goaf 4
Horizontal thrust load when broken swollen.
Large-mining-height working surface is along empty fender laneway support method under the hard direct top of the invention, using following branch
Handguard section:
First: actual conditions of the geosutures above gob side entry top plate are directly pushed up for upper curtate goaf is hard,
Unbalanced support, specific method for protecting support are carried out using hard directly top geosutures as bound pair back load in gob side entry
It is as follows:
(1) in geosutures, (directly top fault block A12 and the top plate on construction shield top on directly top fault block B8) two sides top plate enhance
Anchor pole 9.
On the top plate of geosutures two sides construction shield top top plate enhance anchor pole 9, improve directly top fault block A12 and directly
The stress of top plate near the biting point fault block B8 is pushed up, so that the rock mass near biting point is in triaxial stress state, disconnected
The hinged relationship for keeping stable on line is split, stability of the gob side entry top plate near geosutures is maintained, prevents biting point attached
Close top plate is squeezed bad by powerful horizontal compression, improves its anti-extrusion ability.
(2) it in the hard side for directly pushing up geosutures, i.e., constructs along empty side top plate certain density in directly top fault block B8
Suspention anchor cable 10, suspention anchor cable 10 penetrate hard direct top fault block 8 to above covering in base object model rock stratum 13, along empty fender 2
The hard direct top fault block B8 of top, which is suspended in, to be covered on base object model rock stratum 13, is prevented hard straight after hinge joint accidental destruction
Top fault block B8 is met to the destruction along empty small coal 2.
(3) combination of steel rope 11 for certain density of constructing on hard direct top geosutures entity coal side top plate, by entity coal
The hard directly top fault block A12 combination in side is integral, avoids geosutures biting point plummet load to the curved of hard direct top fault block A12
Bent, absciss layer destruction.
Second, it safeguards along empty fender 2: using fender enhancing side anchor pole 5 on fender.
By safeguard along empty fender 2, make it have the hard direct hinged instability status lower support of top fault block B8 its
The ability of weight load 2/3rds, it is therefore intended that when hard above empty fender 2 directly top fault block B8 and tunnel entity coal
When the hard directly top fault block A12 in side is detached from hinged relationship, it will not be destroyed because of its overload along empty fender 2.
Meanwhile enhancing side anchor pole 5 using fender and giving along empty fender 2 with enough horizontal anchor forces, so that thereon
Various mechanical relationships that hard direct top 8 load of fault block is formed on fissure-plane inside the fender body are in balance, prevent crack
The changing of the relative positions is generated between face, is kept whereby along the steady in a long-term of empty fender body 2.
Third, fender bottom position anchor cable 3, at the top of fender positioning anchor cable 6 by along the bottom of empty fender 2 and
Top is separately fixed between hard direct top fault block B8 and seat earth.
It is broken with the anchor force and 4 filling waste rock of goaf of positioning anchor cable 6 at the top of fender bottom positioning anchor cable 3, fender
Rise the horizontal thrust balance of generation, prevents from being moved into gob side entry 1 along empty fender 2 is whole, and generate floor lift in gallery phenomenon.
4th, help 16 large area by the entire overlying rock mechanical balance knot in upper curtate goaf for tunnel entity coal
Structure and hard directly top fault block load effect, the high feature of support pressure intensity are coupled using lateral wall anchor pole 14, lateral wall anchor cable 15
The method of supporting balances the destruction that its high bearing pressure helps tunnel coal.
Hinge joint outer sky side suspends the load that anchor cable 10 is born in midair and support density calculating is as follows: hinge joint is along the lane Kong Ce
The load Q that anchor cable is born in the unit length of road direction is the half of fault block B gravity, i.e., are as follows:
In formula: the load that anchor cable is born in Q-roadway direction unit length, kN/m；
L-upper curtate roof periodic water component, m；
The hard immediate roof thickness of h-, m；
The body force of the hard direct rimrock layer of γ-, kN/m3；
S-upper curtate face length, m；
Hinge joint is along empty side, it is ensured that hard direct top fault block B stablizes the cable bolting density along roadway direction and is
In formula: the load that anchor cable is born in n-roadway direction unit length, kN/m；
Q0The ultimate load of-single anchor cable, kN/m.
The above is only the preferred embodiment of the application, is made skilled artisans appreciate that or realizing this Shen
Please.Various modifications to these embodiments will be apparent to one skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the application.Therefore, the application
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (4)
1. large-mining-height working surface is along empty fender laneway support method under a kind of hard direct top, it is characterized in that: passing through following step
Suddenly it realizes:
Directly push up fault block A(12 for fender gob side entry is hard), fault block B(8) and fault block C(7) mutual articulated structure, with
Hard direct top geosutures --- fault block A(12) with fault block B(8) hinge lines be bound pair back load carry out it is non-claim branch
Shield:
The top plate on construction shield top enhances anchor pole (9) on the top plate of geosutures two sides, makes hard direct top fault block A(12) and fault block B
(8) rock mass near biting point be in triaxial stress state, it is ensured that fault block B(8), fault block A(12) on geosutures keep stablize
Hinged relationship；
The suspention anchor cable (10) for certain density of constructing along the top plate of sky side in hard direct top geosutures, along empty fender (2)
The hard direct top fault block B(8 of top) it is suspended in and covers on base object model rock stratum (13), break after preventing articulated structure accidental destruction
Block B(8) to the generation destruction along empty fender (2)；
In hard direct top geosutures fault block A(12) combination of steel rope (11) of certain density of constructing on entity coal side top plate, it will be real
The hard fault block A(12 in body coal side) combination is integral, avoid geosutures biting point vertical load to the bending of fault block A(12), from
The destruction of layer；
It is given along empty fender (2) using fender enhancing anchor pole (5) with enough horizontal anchor forces, so that hard direct thereon
It pushes up fault block load and is in balance in the various mechanical relationships formed along empty fender (2) internal crack face；
Using positioning anchor cable (6) will be solid along empty fender (2) along empty fender bottom positioning anchor cable (3), at the top of empty fender
It is scheduled between tight roof and seat earth, with the anchor force of positioning anchor cable and the water of the broken generation of rising of goaf (4) filling waste rock
Flat-pushing dynamic balance prevents from moving along empty fender (2) entirety into tunnel, and generates floor lift in gallery phenomenon；
Using the method for lateral wall anchor pole (14), lateral wall anchor cable (15) coupling supporting, balance what its high bearing pressure helped tunnel coal
Destruction.
2. the empty fender laneway support method in large-mining-height working surface edge under the hard direct top according to claim 1,
Be characterized in: shield top anchor pole (9) provides enough just anchor-holds using overall length bond-anchorage, to hard directly top.
3. large-mining-height working surface is special along empty fender laneway support method under hard direct top according to claim 1
Sign is: positioning anchor cable (6) is constructed according to the elevation angle at the top of empty fender, is deep into hard direct top fault block B(8) 1m in rock stratum
More than；It is constructed along empty fender bottom positioning anchor cable (3) using the angle of depression, is deep into 1m or more in floor strata.
4. large-mining-height working surface is special along empty fender laneway support method under hard direct top according to claim 1
Sign is: the load and support density calculation method that suspention anchor cable (10) is born: hinge joint is in the roadway direction unit length of empty side
The load Q that anchor cable is born is the half of fault block B gravity, i.e., are as follows:
In formula: the load that anchor cable is born in Q-roadway direction unit length, kN/m；
L-upper curtate roof periodic water component, m；
The hard immediate roof thickness of h-, m；
The body force of the hard direct rimrock layer of γ-, kN/m3；
S-upper curtate face length, m；
Hinge joint is along empty side, it is ensured that hard direct top fault block B stablizes the cable bolting density along roadway direction and is
In formula: the load that anchor cable is born in n-roadway direction unit length, kN/m；
Q0The ultimate load of-single anchor cable, kN/m.
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| CN201410755207.XA CN104712348B (en) | 2014-12-11 | 2014-12-11 | Large-mining-height working surface is along empty fender laneway support method under the hard direct top of one kind |
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| CN201410755207.XA CN104712348B (en) | 2014-12-11 | 2014-12-11 | Large-mining-height working surface is along empty fender laneway support method under the hard direct top of one kind |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106555602A (en) * | 2015-09-24 | 2017-04-05 | 新汶矿业集团有限责任公司翟镇煤矿 | A kind of colliery compound roof support and control method |
| CN105317459B (en) * | 2015-11-19 | 2017-07-28 | 中国矿业大学(北京) | A kind of subregion placement method for being used to control tight roof large area caving disaster |
| CN107023311A (en) * | 2017-06-08 | 2017-08-08 | 刘冲 | Roadway repair method below coal column |
| CN107725052B (en) * | 2017-10-31 | 2019-03-22 | 中国中煤能源集团有限公司 | One kind, which is adopted, stays integration exploitation gob side entry top plate constant-resistance anchor body beam method for protecting support |
| CN109779632B (en) * | 2019-01-15 | 2020-09-29 | 山东科技大学 | Coordinated deformation quantitative design method for gob-side entry retaining support system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101725368A (en) * | 2009-11-28 | 2010-06-09 | 山东科技大学 | Thick seam large mining height working face gob-side entry retaining method |
| CN102661144A (en) * | 2012-04-28 | 2012-09-12 | 山东科技大学 | Method for determining anchoring depth of anchor cable along deep lane wall of empty crossheading entity coal side |
| CN103244122A (en) * | 2013-05-13 | 2013-08-14 | 中国矿业大学 | Trinity coupling support stability control method for gob-side entry-driving coal pillar |
| CN103573273A (en) * | 2013-11-14 | 2014-02-12 | 山东科技大学 | Method for suitability evaluation of high-strength material of roadside flexible-strength double-layer composite support in gob-side entry retaining |
| CN104074520A (en) * | 2014-06-25 | 2014-10-01 | 中国矿业大学 | Method for determining lower open-off cut positions of shallow-buried short-distance goaf-side coal pillars |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101725368A (en) * | 2009-11-28 | 2010-06-09 | 山东科技大学 | Thick seam large mining height working face gob-side entry retaining method |
| CN102661144A (en) * | 2012-04-28 | 2012-09-12 | 山东科技大学 | Method for determining anchoring depth of anchor cable along deep lane wall of empty crossheading entity coal side |
| CN103244122A (en) * | 2013-05-13 | 2013-08-14 | 中国矿业大学 | Trinity coupling support stability control method for gob-side entry-driving coal pillar |
| CN103573273A (en) * | 2013-11-14 | 2014-02-12 | 山东科技大学 | Method for suitability evaluation of high-strength material of roadside flexible-strength double-layer composite support in gob-side entry retaining |
| CN104074520A (en) * | 2014-06-25 | 2014-10-01 | 中国矿业大学 | Method for determining lower open-off cut positions of shallow-buried short-distance goaf-side coal pillars |
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