CN110500127A - A kind of Dynamic control method of the prevention and treatment without the lane coal column Qie Dingcheng top plate Non-uniform Settlement - Google Patents
A kind of Dynamic control method of the prevention and treatment without the lane coal column Qie Dingcheng top plate Non-uniform Settlement Download PDFInfo
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- CN110500127A CN110500127A CN201910652273.7A CN201910652273A CN110500127A CN 110500127 A CN110500127 A CN 110500127A CN 201910652273 A CN201910652273 A CN 201910652273A CN 110500127 A CN110500127 A CN 110500127A
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- 239000003245 coal Substances 0.000 title claims abstract description 89
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000002265 prevention Effects 0.000 title claims abstract description 15
- 239000011435 rock Substances 0.000 claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 238000000605 extraction Methods 0.000 claims abstract description 6
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 21
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 238000004364 calculation method Methods 0.000 claims description 10
- 238000010276 construction Methods 0.000 claims description 6
- 230000000295 complement effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 5
- 230000003014 reinforcing effect Effects 0.000 abstract description 2
- 230000005641 tunneling Effects 0.000 abstract description 2
- 238000013316 zoning Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
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Abstract
The present invention relates to a kind of Dynamic control method of the prevention and treatment without the lane coal column Qie Dingcheng top plate Non-uniform Settlement, during tunnelling, are alternately arranged the first anchor pole cable system A1 and the second anchor pole cable system A2 along tunneling direction；To anchor pole rope parameter and its installation site zoning design, the subregion initial-stage reinforcing to top plate is realized, the transmitting that anchor pole cable system passes through inherent power in two regions acts on, influences each other, cooperates, and roof stability controls during common realization driving.It is set in addition, anchor pole is integrated with anchor cable with arrangement, is conducive to improve shallow coal rock mass stress state, improves the fastening strength of superficial part coal and rock, limit superficial part failure and deformation of surrounding rocks.During working face extraction, the interior design for drawing cable parameters and its installation site is carried out to top plate, emphasis, which is realized, controls top plate differential settlement.By during driving, the supporting measure at times during back production, effective force transmitting, the cooperation of the anchor pole rope installed in two periods, the common effective control realized to top plate.
Description
Technical field
It is non-homogeneous heavy without the lane coal column Qie Dingcheng top plate that the present invention relates to colliery tunnel support fields more particularly to a kind of prevention and treatment
The Dynamic control method of drop.
Background technique
The lane Qie Dingcheng is a kind of emerging no coal pillar mining mode, eliminate filling rock pillar in conventional gob side entry retaining,
Without using hand packing material, only top plate need to be carried out to unload pressure drop top, utilize the broken swollen characteristic of mine pressure and rock mass
It realizes without coal pillar mining.In fact, due to the particularity of the lane no coal column Qie Dingcheng technique, will lead to the lane Qie Dingcheng surrounding rock structure with
Asymmetry of the stress distribution along tunnel central axes two sides: in terms of surrounding rock structure, side be through collapsing emit, the hair of compacting process
The coal and rock of raw damage, side are to maintain the entity coal of preferable integrality, and there are dramatically different for the two mechanical characteristic；Stress distribution
Aspect, the lane Qie Dingcheng are in stress-concentrated area generally in stress relaxed area, but by entity coal side top plate and entity coal side.
The otherness of above-mentioned surrounding rock structure and stress distribution will lead to roof deformation in the otherness along tunnel central axis two sides and destroy spy
The otherness of sign causes back Non-uniform Settlement, i.e. the goaf side amount of crushing is much larger than the coal body side amount of crushing,
To goaf side knockdown occurs for top plate.When using traditional symmetrical anchor pole Cable Structure supporting roof, top plate will be to adopting
Extreme subsidence occurs for dead zone side, and drift section area heavy compression influences ventilation, pedestrian.
Summary of the invention
This hair Ming in order to overcome the problems, such as the lane no coal column Qie Dingcheng top plate Non-uniform Settlement, provide a kind of no coal column cut top at
The administering method of lane top plate Non-uniform Settlement.
The technical solution adopted by the present invention is that: a kind of Dynamic control of the prevention and treatment without the lane coal column Qie Dingcheng top plate Non-uniform Settlement
Method is alternately arranged the first anchor pole cable system and the second anchor along tunnelling direction during driving using supporting measure at times
Bar cable system, until tunnelling finishes；With the advance of the face during back production, in the first anchor pole cable system and the second anchor pole rope
Anchor cable girder system is drawn in arranging between system, until working face extraction finishes, is specifically comprised the following steps:
Step 1) during driving the first anchor pole cable system and the second anchor pole cable system are arranged along roadway direction；
Step 1) arranges the first anchor rod system, and steps are as follows:
Step 1.11) is based on theoretical calculation formula according to Seam Roof And Floor condition, span length and anchor pole rope parameter model
Determine different anchor pole rope assembled schemes, so that top plate bearing capacity must not be lower than 0.5MPa after supporting, calculation formula is as follows:
In formula, σ is top plate bearing capacity after supporting, and Q is to apply anchor pole or anchor cable pretightning force, l0It is effective for anchor pole or anchor cable
Length；α is anchor pole or anchor cable pilot angle, s0For anchor pole or anchor cable spacing；For roof rock mass internal friction angle after supporting, R is tunnel
Effective radius；
Then, in conjunction with practical geological conditions, mathematical calculation model is established, different anchor pole rope combination condition lower roof plates is checked and answers
Power state determines therefrom that anchor pole rope assembled scheme；
Step 1.12) is according to determining anchor pole rope assembled scheme, from laneway midline, to entity coal help side, anchor pole rope according to
It is secondary to be named as Z1、Z2·····Zi, side 4 is helped to coal column, anchor pole rope is successively named as Z1', Z2' Zi', i are
Tunnel unilateral side anchor pole rope quantity, adjacent anchor pole or anchor cable interval 600mm~1200mm setting；
Step 1.13) determines the anchor pole of anchor pole rope, anchor cable position, the anchor pole rope Z at entity coal side sideiIt is necessary for anchor
Rope, in addition for positioned at Zi-2' to Zi-1Region in be arranged 1~2 anchor cable, remaining position be anchor structure；
It is located in same vertical plane on step 1.2) back, throws anchor pole or anchor into top plate by construction equipment
Cable Structure, anchor cable ZiIt is rolled tiltedly to coal side, remaining anchor pole or the vertical top plate arrangement of anchor cable；
Step 1.3) connects anchor pole with anchor cable by band-like connection structure, and applies pretightning force, forms the first anchor pole system
Unite A1；
Step 2) arranges the second anchor rod system, and steps are as follows:
Step 2.1) determines not according to Seam Roof And Floor condition, span length and anchor pole rope parameter model according to (formula one)
It is combined with anchor pole rope, so that top plate bearing capacity must not be lower than 0.5MPa after supporting；
Step 2.21) is according to determining anchor pole rope assembled scheme, from laneway midline, to entity coal help side, anchor pole rope according to
It is secondary to be named as Y1、Y2·····Yi, risen to coal column side side 4, anchor pole rope is successively named as Y1', Y2' Yi', i
For tunnel unilateral side anchor pole rope quantity, adjacent anchor pole or anchor cable interval 600mm~1200mm setting；
Step 2.22) determines the anchor pole of anchor pole rope, anchor cable position, is Y at coal side side and coal side sidei' and YiFor anchor
Bar, anchor cable are located at tunnel central region, i.e. Y2To Y2In the range of '；
It is located in same vertical plane on step 2.2) back, throws anchor pole or anchor into top plate by construction equipment
Cable Structure, anchor pole Yi are rolled tiltedly to entity coal side, remaining anchor pole or the vertical top plate arrangement of anchor cable；
Step 2.3) connects anchor pole with anchor cable by band-like connection structure, and applies pretightning force, forms the second anchor pole system
System；
Step 2) arranged between the first anchor pole cable system and the second anchor pole cable system during back production in draw anchor cable trusses system
System；
Step 1) is no less than 2 interior drawing anchor cables to back complement in face end region, and interior drawing anchor cable is to reality
Body coal side rolls tiltedly, adjacent anchor cable span degree 1500mm≤n≤3000mm, and interior drawing anchor cable rope and coal column help lateral extent 500mm≤m
≤1000mm；
Step 2) selects truss structure to connect anchor cable in top board surface in top board surface, forms interior drawing anchor cable trusses system
System.
Further, anchor pole rope quantity i≤4 and anchor cable quantity≤3 piece of the first anchor pole cable system；First anchor pole rope
System anchor cable Zi helps inclined 10 degree≤α≤25 degree of angle in side to entity coal.
Further, in the first anchor pole cable system anchor pole select 20~22mm of diameter full thread steel high strength anchor bar,
2400~2700mm of length, pretightning force are not less than 80kN；Anchor cable selects 17~22mm of diameter, 1 × 7 structure steel strand wires, length
5300~6300mm, pretightning force are not less than 120kN.
Further, anchor pole rope quantity i≤4 and anchor cable quantity≤3 piece of the second anchor pole cable system；Close to entity coal
Help the anchor pole Y of sidei10 degree≤α≤25 degree of cant angle degree are helped to entity coal.
Further, in the second anchor pole cable system system anchor pole select 20~22mm of diameter the high-strength anchor of full thread steel
Bar, 2400~2700mm of length, pretightning force are not less than 80kN；Anchor cable selection 17~22mm of diameter steel strand wires, length 7300~
8300mm etc., pretightning force are not less than 120kN.
Further, the band-like connection structure thickness 5mm≤f≤10mm, width 200mm≤e≤500mm, length d=
(2i-1) * b+400mm, design has the circular hole passed through for anchor pole rope, 25≤c of Circularhole diameter≤30mm above.
Further, the interior interior drawing anchor cable for drawing anchor cable truss structure and 50 degree≤β≤80 degree of vertical direction angle, phase
It is 1500mm≤n≤3000mm that span between anchor cable is drawn in adjacent, and interior drawing anchor cable and coal column side lateral extent are 500mm≤m≤1000mm.
Further, the interior interior drawing anchor cable for drawing anchor cable truss structure selects 1 × 19 strand of steel of 17~22mm of diameter to twist
Line, pretightning force are not less than 120kN.
Further, the interior length M for drawing anchor cable1、M2It is determined according to the following equation:
C0For the cohesive force of coal petrography intersection, ψ0For the internal friction angle of coal petrography intersection；M is coal seam thickness；Px bracket is to coal
The supporting power of side；A is coefficient of horizontal pressure；K is the factor of stress concentration；γ is rock stratum volume-weighted average；H is tunnel away from earth's surface depth.
Further, the truss structure allows pressure device to form by pedestal and class are trapezoidal, and pedestal is close to back setting,
The trapezoidal lower section for allowing pressure device to be set to pedestal of class, class is trapezoidal to allow press fitting to be set to ladder structure of right angle, opens up anchor perpendicular to its bevel edge
Oblique anchor cable hole is offered on Suo Kong, with pedestal to be correspondingly arranged；The pedestal is hardened structure, length s, width k, with a thickness of r,
S=(j-1) * n+400mm, 350mm≤k≤600mm, 6mm≤r≤15mm；Anchor cable bore dia 25mm≤c≤30mm.
The patent of invention the utility model has the advantages that
1, during tunnelling, to the zoning design of anchor pole rope parameter and its installation site, the subregion to top plate is realized
Initial-stage reinforcing, wherein A1 anchor pole cable system is reinforced to by entity coal side top panel area, and A2 anchor pole cable system is in the middle part of tunnel
Region top plate is reinforced, and the transmitting that anchor pole cable system passes through inherent power in two regions acts on, influences each other, cooperates, altogether
It is controlled with roof stability during realizing driving.It is set in addition, anchor pole is integrated with anchor cable with arrangement, is conducive to improve superficial part coal petrography
Body stress state improves the fastening strength of superficial part coal and rock, limits superficial part failure and deformation of surrounding rocks.
2, during working face extraction, the interior design for drawing cable parameters and its installation site, emphasis realization pair are carried out to top plate
The control of top plate differential settlement.It is interior that anchorage cable anchoring point is drawn to be located at top plate above stable entity coal, rather than stablize right above tunnel
Property slightly lower top plate, anchor point is firm, not easily to fall off, carries out effective tensioning suspention to top plate by the inclination stretching force of anchor cable；
Lower girder structure, which has to allow, presses energy-absorbing function, under anchorage cable stretching effect, while to top plate application, shield table is acted on enough,
It also avoids truss structure drawing crack to tear to shreds, to sink to achieving effective control to top plate inclination.By during driving, during back production
Supporting measure at times, effective force transmitting, the cooperation of the anchor pole rope installed in two periods are common to realize to the effective of top plate
Control.
Detailed description of the invention
Schematic diagram during Fig. 1-tunnelling；
Roof timbering top view during Fig. 2-tunnelling；
I-I sectional view of Fig. 3-A1 anchor pole cable system；
II-II sectional view of Fig. 4-A2 anchor pole cable system；
Roof timbering stereoscopic schematic diagram during Fig. 5 tunnelling；
The band-like attachment structure schematic diagram of Fig. 6-；
The band-like connection structure cross-sectional view of Fig. 7-；
Schematic diagram during Fig. 8-working face extraction；
Roof timbering top view during Fig. 9-tunnel back production；
III-III sectional view of Figure 10-A3 anchor pole cable system；
Roof timbering stereoscopic schematic diagram during Figure 11-working face extraction；
Figure 12-truss structure schematic diagram；
Figure 13-base vertical view；
1-tunnel, 2-top plates, 3-entity coals help side, and 4-coal columns help side, 5-band-like connection structures, 6-working face ends
Head region, 7,8-anchor cables, 9-plate structures, the trapezoidal pressure device that allows of 10-classes；
A-A1 system and A2 system spacing, b-anchor pole rope spacing, c-circular hole aperture, d-banded structure length, e-band
Shape structure width, f-banded structure thickness, anchor pole rope quantity in i-A1, A2 system, anchor pole rope quantity in j-A3 system, k-
Trusses base width, l-span length, m-anchor cable away from coal column help distance, the interior drawing anchor cable spacing of n-, r- trusses base thickness,
S- trusses base length.
Specific embodiment
Embodiment 1
As shown in Figs. 1-5, step 1) during driving the first anchor pole cable system A1 and the second anchor pole are arranged along roadway direction
Cable system A2, the spacing between two systems are a；
As shown in Figure 1,2 and 3, step 1) arranges the first anchor rod system A1, and steps are as follows: step 1.1) pushes up bottom according to coal seam
2 condition of plate and span length l and anchor pole rope parameter model, determine different anchor pole rope assembled schemes based on theoretical calculation formula, make
Top plate bearing capacity must not be lower than 0.5MPa after obtaining supporting, and calculation formula is as follows:
In formula, σ is top plate bearing capacity after supporting, and Q is to apply anchor pole or anchor cable pretightning force, l0It is effective for anchor pole or anchor cable
Length；α is anchor pole or anchor cable pilot angle, s0For anchor pole or anchor cable spacing；For roof rock mass internal friction angle after supporting, R is tunnel
Effective radius；
In conjunction with practical geological conditions, mathematical calculation model is established, checks different anchor pole rope combination condition lower roof plate stress shapes
State determines therefrom that anchor pole rope assembled scheme；
Step 1.11) helps side 3 from laneway midline, to entity coal, and anchor pole rope is successively named as Z1、Z2、Z3, helped to coal column
Side 4, anchor pole rope are successively named as Z1', Z2', Z3', tunnel unilateral side anchor pole rope quantity i=3 root amount to 6, and the quantity of anchor cable is 3
Root, adjacent anchor pole or anchor cable interval 600mm~1200mm setting (referring to Fig. 3 and Fig. 4)；Anchor pole selection 20~22mm's of diameter is complete
Screw-thread steel high strength anchor bar, 2400~2700mm of length, pretightning force are not less than 80kN；Anchor cable selects 17~22mm of diameter, 1 × 7 knot
Structure steel strand wires, 5300~6300mm of length, pretightning force are not less than 120kN；
Step 1.12) determines the anchor pole of anchor pole rope, anchor cable position, close to coal side side 3 at Z3 be anchor cable, in addition for positioned at
Z1 ' and Z2 are anchor cable, reinforce the supporting to middle part to entity coal side 3 range top plate of side, remaining position is anchor structure (referring to figure
2 and Fig. 5)；
It is located in same vertical plane on step 1.2) back 2, anchor pole or anchor is thrown into top plate 2 by construction equipment
Cable Structure, anchor cable Z3 are tilted to entity coal side side 3,10 degree≤α≤25 degree of tilt angle, remaining anchor pole or the vertical top plate 2 of anchor cable
It arranges (referring to Fig. 3)；
Step 1.3) connects anchor pole and anchor cable by band-like connection structure 5, and applies pretightning force, forms the first anchor pole system
Unite A1；(referring to Fig. 6 and Fig. 7)；Band-like 5 thickness 5mm≤f of connection structure≤10mm, width 200mm≤e≤500mm, length d=
(2i-1) * b+400mm, design has the circular hole passed through for anchor pole rope, 25≤c of Circularhole diameter≤30mm above.
Step 2) is along tunneling direction, in the second anchor of location arrangements of distance the first anchor rod system A1 about 1600mm~1200mm
Lever system A2, steps are as follows: step 2.1) passes through theoretical calculation or numerical simulation according to Seam Roof And Floor condition and span length l
Method determines anchor pole rope quantity, the installation site of anchor pole, anchor cable；
Step 2.11) is named to anchor pole rope, from laneway midline, helps side 3 to entity coal, anchor pole rope is successively named as Y1、
Y2、Y3, risen to coal side side 4, anchor pole rope is successively named as Y1', Y2', Y3', tunnel unilateral side anchor pole rope quantity i=3 root amount to 6,
Including 4 anchor poles, 2 anchor cables (referring to fig. 2, Fig. 4 and Fig. 5)；Adjacent anchor pole or anchor cable interval 600mm~1200mm setting；Anchor
Bar selects the full thread steel high strength anchor bar of 20~22mm of diameter, 2400~2700mm of length, and pretightning force is not less than 80kN；Anchor cable choosing
With diameter 17~22mm steel strand wires, 7300~8300mm of length is differed, and pretightning force is not less than 120kN；
Step 2.12) determines the anchor pole of anchor pole rope, anchor cable position, close to coal column side 4 and Y3 ' and Y3 at coal side side 3 and
Y1, Y1 ' positioned at tunnel central region are anchor pole, Y2 and Y2 ' is anchor cable, are reinforced to the supporting of top plate central region (referring to fig. 2
And Fig. 5).
It is located in same vertical plane on step 2.2) back 2, anchor pole or anchor is thrown into top plate by construction equipment
Cable Structure, anchor pole Y3It is tilted to coal side side 3,10 degree≤α≤25 degree of tilt angle, remaining anchor pole or the vertical top plate 2 of anchor cable are arranged
(referring to fig. 4)；
Step 2.3) connects anchor pole and anchor cable by band-like connection structure 5, and applies pretightning force, forms the second anchor pole system
Unite A2；
As illustrated in figs. 8-12, step 2) it is located at the first anchor pole cable system A1 and in face end region 6 during back production
Anchor cable girder system A3 is drawn in arranging between two anchor pole cable system A2；
Step 1) is also possible to 3 or 4 to 2 complement of back, 2 Gen Neila anchor cable 7,8 in face end region 6
Root, at least one help side 4 close to coal column, and one close to laneway midline；Interior drawing anchor cable 7,8 is tilted to entity coal side side 3, inclination angle
Spend 50 degree≤β≤80 degree, adjacent anchor cable span degree 1500mm≤n≤3000mm, anchor cable and coal column side 4 distance 500mm≤m of side≤
1000mm (referring to Figure 11, Figure 12 and Figure 13)；Interior 1 × 19 strand of steel strand wires for drawing anchor cable 7,8 to select 17~22mm of diameter, pretightning force
Not less than 120kN；The interior length M for drawing anchor cable 7,81、M2It is determined according to the following equation:
C0For the cohesive force of coal petrography intersection, ψ0For the internal friction angle of coal petrography intersection；M is coal seam thickness；Px bracket is to coal
The supporting power of side；A is coefficient of horizontal pressure；K is the factor of stress concentration；γ is rock stratum volume-weighted average；H is tunnel away from earth's surface depth；
Step 2) selects truss structure to connect anchor cable on 2 surface of top plate on 2 surface of top plate, forms interior drawing anchor cable trusses system
Unite A3；Truss structure allows pressure device 10 to form by pedestal 9 and class are trapezoidal, and pedestal 9 is close to back setting, and class is trapezoidal to allow press fitting
10 lower sections for being set to pedestal 9 are set, class is trapezoidal to allow pressure device 10 to be ladder structure of right angle, anchor cable hole is opened up perpendicular to its bevel edge, with
Oblique anchor cable hole is offered on pedestal 9 to be correspondingly arranged (referring to Figure 12 and Figure 13)；The class is trapezoidal to allow pressure device 10 by energy-absorbing material
It is made, such material is to have both wilful and elasticity synthetic elastic material, such material can pass through inner part under external force
Son is in close contact and is significantly compression deformation, to achieve the purpose that absorption energy by External reforming for internal force；Allow pressure device
It is attached between pedestal 9 by chemically or physically effect；The pedestal 9 is hardened structure, length s, width k, thickness
For r, s=(2j-1) * n+400mm, 350mm≤k≤600mm, 6mm≤r≤15mm；25≤c of anchor cable bore dia≤30mm (referring to
Figure 12 and Figure 13).
Claims (10)
1. a kind of Dynamic control method of the prevention and treatment without the lane coal column Qie Dingcheng top plate Non-uniform Settlement, which is characterized in that use timesharing
Section supporting measure, is alternately arranged the first anchor pole cable system (A1) and the second anchor pole cable system along tunnelling direction during driving
(A2), until tunnelling finishes；With the advance of the face during back production, in the first anchor pole cable system (A1) and the second anchor pole rope
Anchor cable girder system (A3) is drawn in arranging between system (A2), until working face extraction finishes, is specifically comprised the following steps:
Step 1) during driving the first anchor pole cable system (A1) and the second anchor pole cable system (A2) are arranged along roadway direction；
Step 1) arranges the first anchor rod system (A1), and steps are as follows:
Step 1.11) is determined according to Seam Roof And Floor condition, span length and anchor pole rope parameter model based on theoretical calculation formula
Different anchor pole rope assembled schemes, so that top plate bearing capacity must not be lower than 0.5MPa after supporting, calculation formula is as follows:
In formula, σ is top plate bearing capacity after supporting, and Q is to apply anchor pole or anchor cable pretightning force, l0For anchor pole or anchor cable effective length；
α is anchor pole or anchor cable pilot angle, s0For anchor pole or anchor cable spacing；For roof rock mass internal friction angle after supporting, R is that tunnel is effective
Radius；
Then, in conjunction with practical geological conditions, mathematical calculation model is established, checks different anchor pole rope combination condition lower roof plate stress shapes
State determines therefrom that anchor pole rope assembled scheme；
Step 1.12) is according to determining anchor pole rope assembled scheme, from laneway midline, helps side (3) to entity coal, anchor pole rope is successively
It is named as Z1、Z2·····Zi, side (4) are helped to coal column, anchor pole rope is successively named as Z1', Z2' Zi', i are
Tunnel unilateral side anchor pole rope quantity, adjacent anchor pole or anchor cable interval 600mm~1200mm setting；
Step 1.13) determines the anchor pole of anchor pole rope, anchor cable position, the anchor pole rope Z at entity coal side side (3)iIt is necessary for anchor
Rope, in addition for positioned at Zi-2' to Zi-1Region in be arranged 1~2 anchor cable, remaining position be anchor structure；
Be located in same vertical plane on step 1.2) back (2), by construction equipment to throw into top plate (2) anchor pole or
Anchor cable structure, anchor cable ZiIt is tilted to coal side side (3), remaining anchor pole or the vertical top plate of anchor cable (2) arrangement；
Step 1.3) connects anchor pole with anchor cable by band-like connection structure, and applies pretightning force, forms the first anchor rod system
(A1)；
Step 2) arranges the second anchor rod system (A2), and steps are as follows:
Step 2.1) is according to Seam Roof And Floor condition, span length and optional support anchor rod rope parameter model, according to (formula one)
Different anchor pole rope combinations are determined, so that top plate bearing capacity must not be lower than 0.5MPa after supporting；
Step 2.21) is according to determining anchor pole rope assembled scheme, from laneway midline, helps side (3) to entity coal, anchor pole rope is successively
It is named as Y1、Y2·····Yi, risen to coal column side side (4), anchor pole rope is successively named as Y1', Y2' Yi', i
For tunnel unilateral side anchor pole rope quantity, adjacent anchor pole or anchor cable interval 600mm~1200mm setting；
Step 2.22) determines the anchor pole of anchor pole rope, anchor cable position, is Y at coal side side (4) and coal side side 3i' and YiFor anchor
Bar, anchor cable are located at tunnel central region, i.e. Y2To Y2In the range of '；
Be located in same vertical plane on step 2.2) back (2), by construction equipment to throw into top plate (2) anchor pole or
Anchor cable structure, anchor pole YiIt is tilted to entity coal side side 3, remaining anchor pole or the vertical top plate of anchor cable (2) arrangement；
Step 2.3) connects anchor pole with anchor cable by band-like connection structure, and applies pretightning force, forms the second anchor rod system
(A2)；
Step 2) arranged between the first anchor pole cable system (A1) and the second anchor pole cable system (A2) during back production in draw anchor cable purlin
Girder system unites (A3)；
Step 1) is no less than 2 interior drawing anchor cables (7), (8) to back (2) complement in face end region (6), interior
Anchor cable (7), (8) are drawn to tilt to entity coal side side (3), adjacent anchor cable span degree 1500mm≤n≤3000mm, anchor cable and coal column are helped
4 distance 500mm≤m of side≤1000mm；
Step 2) selects truss structure to connect anchor cable in top board surface in top board surface, forms interior drawing anchor cable girder system
(A3)。
2. a kind of Dynamic control method of the prevention and treatment without the lane coal column Qie Dingcheng top plate Non-uniform Settlement according to claim 1,
It is characterized in that, anchor pole rope quantity i≤4 and anchor cable quantity≤3 piece of the first anchor pole cable system (A1)；First anchor pole rope system
Unite (A1) anchor cable ZiSide (3) inclined 10 degree≤α≤25 degree of angle are helped to entity coal.
3. a kind of Dynamic control method of the prevention and treatment without the lane coal column Qie Dingcheng top plate Non-uniform Settlement according to claim 1,
It is characterized in that, anchor pole selects the full thread steel high strength anchor bar of 20~22mm of diameter in the first anchor pole cable system (A1), it is long
2400~2700mm is spent, pretightning force is not less than 80kN；Anchor cable selects 17~22mm of diameter, 1 × 7 structure steel strand wires, length 5300
~6300mm, pretightning force are not less than 120kN.
4. a kind of Dynamic control method of the prevention and treatment without the lane coal column Qie Dingcheng top plate Non-uniform Settlement according to claim 1,
It is characterized in that, anchor pole rope quantity i≤4 and anchor cable quantity≤3 piece of the second anchor pole cable system (A2)；It is helped close to entity coal
The anchor pole Y of side (3)iSide (3) 10 degree≤α≤25 degree of tilt angle are helped to entity coal.
5. a kind of Dynamic control method of the prevention and treatment without the lane coal column Qie Dingcheng top plate Non-uniform Settlement according to claim 1,
It is characterized in that, anchor pole selects the high-strength anchor of full thread steel of 20~22mm of diameter in the second anchor pole cable system (A2) system
Bar, 2400~2700mm of length, pretightning force are not less than 80kN；Anchor cable selection 17~22mm of diameter steel strand wires, length 7300~
8300mm etc., pretightning force are not less than 120kN.
6. a kind of Dynamic control method of the prevention and treatment without the lane coal column Qie Dingcheng top plate Non-uniform Settlement according to claim 1,
It is characterized in that, the band-like connection structure thickness 5mm≤f≤10mm, width 200mm≤e≤500mm, length d=(2i-
1) * b+400mm, design has the circular hole passed through for anchor pole rope, 25≤c of Circularhole diameter≤30mm above.
7. a kind of Dynamic control method of the prevention and treatment without the lane coal column Qie Dingcheng top plate Non-uniform Settlement according to claim 1,
It is characterized in that, the interior interior drawing anchor cable (7) for drawing anchor cable truss structure (A3), (8) and 50 degree≤β≤80 of vertical direction angle
Degree, span is 1500mm≤n≤3000mm, interior drawing anchor cable (7), (8) and coal column side side (4) between adjacent interior drawing anchor cable (7), (8)
Distance is 500mm≤m≤1000mm.
8. a kind of Dynamic control method of the prevention and treatment without the lane coal column Qie Dingcheng top plate Non-uniform Settlement according to claim 1,
It is characterized in that, the interior interior drawing anchor cable (7) for drawing anchor cable truss structure (A3), (8) select 1 × 19 strand of 17~22mm of diameter
Steel strand wires, pretightning force are not less than 120kN.
9. a kind of Dynamic control method of the prevention and treatment without the lane coal column Qie Dingcheng top plate Non-uniform Settlement according to claim 1,
It is characterized in that, the interior length M for drawing anchor cable (7), (8)1、M2It is determined according to the following equation:
C0For the cohesive force of coal petrography intersection, ψ0For the internal friction angle of coal petrography intersection；M is coal seam thickness；Px bracket helps coal
Supporting power；A is coefficient of horizontal pressure；K is the factor of stress concentration；γ is rock stratum volume-weighted average；H is tunnel away from earth's surface depth.
10. a kind of Dynamic control method of the prevention and treatment without the lane coal column Qie Dingcheng top plate Non-uniform Settlement according to claim 1,
It is characterized in that, the truss structure allows pressure device (10) to form by pedestal (9) and class are trapezoidal, pedestal (9) is close to back
Setting, the trapezoidal lower section for allowing pressure device (10) to be set to pedestal (9) of class, class is trapezoidal to allow pressure device (10) to be ladder structure of right angle, hangs down
Anchor cable hole directly is opened up in its bevel edge, is correspondingly arranged with oblique anchor cable hole is offered on pedestal (9)；The pedestal (9) is hardened structure, long
Degree is s, width k, with a thickness of r, s=(j-1) * n+400mm, 350mm≤k≤600mm, 6mm≤r≤15mm；Anchor cable hole is straight
Diameter 25mm≤c≤30mm.
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