CN106150522B - A kind of top plate using inspection instrument for borehole detection Collapsed zone collapses administering method - Google Patents
A kind of top plate using inspection instrument for borehole detection Collapsed zone collapses administering method Download PDFInfo
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- CN106150522B CN106150522B CN201610499977.1A CN201610499977A CN106150522B CN 106150522 B CN106150522 B CN 106150522B CN 201610499977 A CN201610499977 A CN 201610499977A CN 106150522 B CN106150522 B CN 106150522B
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- slip casting
- zone
- hole
- injected hole
- country rock
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
Abstract
The invention discloses a kind of top plate using inspection instrument for borehole detection Collapsed zone to collapse administering method, and the drilling in the Gangue of drift section middle and upper part inbreak, length direction and the plane where roadway floor of the drilling are in α angles, and the scope at the α angles is：The extremely unstable condition lower angle of country rock is 63 °, and country rock instability condition lower angle is 49 °, and surrounding rock stability general condition lower angle is 45 °, and country rock is 42 ° compared with stable condition lower angle, and country rock stabilizer pole condition lower angle is 28 °；It is to reinforce empty top zone and part by grouting filling to be caving spoil and provide fall of ground a kind of simple, safe and reliable processing method that top plate of the present invention using inspection instrument for borehole detection Collapsed zone, which collapses administering method,.
Description
Technical field
The present invention relates to mining industry field, collapses and controls more particularly to a kind of top plate using inspection instrument for borehole detection Collapsed zone
Reason method.
Background technology
Often occur that roof strata emits on a large scale for country rock occurrence condition difference or extraneous stress disturbance, underworkings
Fall, to ensure that the tunnel meets its character of use within the period of service, it is necessary to caved gangue is purged, while to roof fall region
Country rock carries out consolidation process, and it is unobstructed to recover tunnel.Traditional way is while being removed to caved gangue, to empty top zone wood
Pile carries out connecing top, and backboard and metallic support, especially complex procedures, construction personnel are installed in grillage lower section by tunnel design profile line
In non-support dead zone operation is emitted for a long time, personal safety is difficult to ensure that, in addition, grillage can not show a candle to rock closely knit, weak surrounding rock
Under secondary inbreak possibility it is very big, connect very useful timber and easily rot in wet condition, therefore be badly in need of a kind of simple, peace
Entirely, reliably administering method is collapsed using the top plate of inspection instrument for borehole detection Collapsed zone.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of simple, safe and reliable detected using inspection instrument for borehole to emit
The top plate settled in an area collapses administering method.
A kind of top plate using inspection instrument for borehole detection Collapsed zone collapses administering method, includes the following steps：
(1) roof fall seriousness judges：The whether completely plugged tunnel of caved gangue is judged according to caved gangue amount；When inbreak cash
During the completely plugged tunnel of stone, the stability of country rock is judged by Assessment of Surrounding Rock Stability, is divided into that country rock is extremely unstable, country rock is unstable
Fixed, surrounding rock stability is generally, country rock relatively stablizes and country rock stabilizer pole；
(2) drilling in the Gangue of drift section middle and upper part inbreak, the length direction and roadway floor of the drilling
Place plane is in α angles, and the scope at the α angles is：
The extremely unstable condition lower angle of country rock is 63 °, and country rock instability condition lower angle is 49 °, and surrounding rock stability is general
Condition lower angle is 45 °, and country rock is 42 ° compared with stable condition lower angle, and country rock stabilizer pole condition lower angle is 28 °；
(3) using rock breakdown situation above inspection instrument for borehole detection caved gangue, determine that the inbreak of back rock stratum is
It is no to form volume, empty top zone or the difference in height of caving zone vertex and back that sky pushes up, sky pushes up in the case of the empty top of formation,
At least one empty top zone injected hole and multiple caving zone injected holes are set according to detection event；
(4) slip casting and sealing of hole；
(5) tunnel：After the completion of slip casting, the goaf of back rock stratum inbreak formation and the Gangue of inbreak are in injection slurry
Under the action of consolidation become a stable entirety, using YT28 type rock drills, along tunnel design profile line, back is emitted
The Gangue fallen is excavated；
(6) supporting：When driving reaches a circulation step pitch 1m, stop driving, cut off exposed grouted anchor bar, remove periphery
Jute, by top tray and taperliner and screw, manually apply 225KN moments of torsion；
Meanwhile the back excavated carried on the back using backboard it is tight, from outside to inside, downwind set U-shaped canopy by frame, it is U-shaped
Canopy moves towards 1 meter 1 along tunnel, and supporting is carried out to tunnel；Complete supporting after repeat step (5) and step (6), carry out next step away from
Driving and support work, ensure under slip casting caving zone Excavation Length control within 1m safe distances, until tunnel is complete
Perforation；
(7) grouting and reinforcing：After the roadway linking of inbreak region, long drilled holes are designed, squeeze into grouted anchor bar, installation Grouting Pipe note
Slurry, is deep at the top of long drilled holes, sealing of hole and slip casting.
Top plate of the present invention using inspection instrument for borehole detection Collapsed zone collapses administering method, wherein, in step (3)
The set-up mode of the empty top zone injected hole and caving zone injected hole is：When there is 1.5m in empty top zone3Below or without empty top zone
When, 1 empty top zone injected hole is only needed in empty top zone, extracts inspection instrument for borehole out at this time, by the drilling in step (2) as empty top zone
Injected hole uses, and is arranged in vertical multiple caving zone injected holes in the empty top zone injected hole lower part；When empty top zone is big
In 1.5m3When, sealing pores are carried out to the drilling in step (2), while per 1.5m3Space set an empty top zone injected hole,
At the same time multiple caving zone injected holes are arranged in vertical in each empty top zone injected hole lower part；
The empty top zone injected hole and the caving zone injected hole are evenly arranged on drift section, less than 1.5m3Press
1.5m3Calculate；The caving zone slip casting hole number determines that difference in height is every according to the difference in height of caving zone vertex and back
0.5m~0.8m sets a caving zone injected hole, and the empty top zone injected hole must pass through to empty top zone, the inbreak
Band injected hole runs through caving zone.
Top plate of the present invention using inspection instrument for borehole detection Collapsed zone collapses administering method, wherein, when tunnel emits
When falling strip length and being more than 3m, difference in height sets a caving zone injected hole per 0.5m~0.7m, when tunnel inbreak strip length
During less than 3m, difference in height sets a caving zone injected hole per 0.7m~0.9m, the empty top zone injected hole and described emits
Fall band injected hole and be more than 0.4m, the empty top zone injected hole and institute with construction the distance between side back and inbreak junction
State between caving zone injected hole or the distance between the two neighboring caving zone injected hole is not less than 0.1m.
Top plate of the present invention using inspection instrument for borehole detection Collapsed zone collapses administering method, wherein, the sealing of hole
Using cork and Chinese ephedra；The sealed borehole length of the empty top zone injected hole is not less than 300mm, the sealing of hole of the caving zone injected hole
Length is the intersection point of straight line and back where the length direction of the caving zone injected hole to the caving zone injected hole
Air line distance between aperture.
Top plate of the present invention using inspection instrument for borehole detection Collapsed zone collapses administering method, wherein, in step (4)
That injection slurry is selected during slip casting is the mining solid that Asia G03 of chemical filler, by your the solid Asia G03 of two-component packaging
Component A and B component are with 1:1 volume ratio injection, after mixing, its state is changed into solid, slip casting from liquid within the time of 150s
When, the grouting pressure of the empty top zone injected hole is between 1.5MPa-2MPa, the grouting pressure control of the caving zone injected hole
Between 1.3MPa-1.5MPa, suspend when grouting pressure is higher than this scope and note again in a moment；
After Collapsed zone Gangue has injection slurry exudation, when injected hole is not into slurry, stop slip casting；Since tunnel is pushed up after slip casting
The empty top zone that slate layer inbreak is formed can be full of by the solid filling thing with certain caking property that injection slurry is formed, so that
Form filler and connect top；The Gangue of inbreak is consolidated into a metastable entirety under the cementation of injection slurry；
The empty top zone injected hole uses anchor cable machine drilling, and aperture Ф 32mm, the depth in hole is 5.5m；The caving zone
Injected hole uses air drill drilling, aperture Ф 38mm, depth 3.5m, and blows water and coal petrography powder in hole with a device is swept, and will note
Slurry anchor pole inserts in the hole, and the exposed 50~70mm of grouted anchor bar is convenient to connect slip casting machine；
During slip casting, pay attention to checking whether other grouted anchor bars and coal wall have spillage phenomenon, during if any spillage phenomenon,
In the case of non-stop-machine, blocked with quick cement or Anchor Agent, after quick cement or Anchor Agent solidification, be further continued for noting
Slurry, continues to leak to prevent slurries, while the grouted anchor bar mark of leakage is clear.
Top plate of the present invention using inspection instrument for borehole detection Collapsed zone collapses administering method, wherein, the slip casting
Anchor pole is hollow type, long 3.5m, outside diameter 32mm, internal diameter 22mm, tensile strength 280KN；
The body of rod of the end 1.5mm of the grouted anchor bar is fabricated to helicitic texture, and the thread of the helicitic texture is high
1.5mm, pitch 12.5mm；The body of rod periphery of the grouted anchor bar is provided with a circle groove and two symmetrically arranged every 0.3m
Injected hole, the depth of the groove is 3mm, width 10mm；The injected hole connects the bottom of the groove and the slip casting
The inner space of anchor pole, a diameter of 6mm of injected hole, length 7mm, the groove is since the end of the grouted anchor bar
Set altogether at 10, apart from end 0.05m~0.1m at first, the front portion of the grouted anchor bar is conical design；
The grouted anchor bar further includes closed circle, and quantity is consistent with the quantity of the groove, and the closed circle is by banding knot
The body of structure and two cylinders being fixed thereon are formed, and the height of the cylinder is longer 2mm than the length of the injected hole, described
The diameter of cylinder is consistent with the diameter of the injected hole, the length of the body and the week of the circumference of the bottom formation of the groove
Length is consistent, the equivalent width of width and the groove, and thickness is consistent with the depth of the groove；The cylinder is by water swelling material
Material is made, and the body is made of plastics；
During use, the body of the banded structure is enclosed and is fixed on the groove, described two cylinders with it is described
Two injected hole matchings are fixed, and are tightened in the outside of the body using steel disc pitch of the laps, are wrapped with jute.
Top plate of the present invention using inspection instrument for borehole detection Collapsed zone collapses administering method, wherein, the U-shaped canopy
Iron backboard is set up between back, the iron backboard specification is：Length × width × height=930mm × 150mm × 60mm, interval
Mono- piece of 500 ± 50mm, is evenly arranged the tightly back of the body jail that to stop, four iron pull rods of setting per canopy, each one at vault center line both sides 500mm
Root, two help column leg away from bottom plate up each one at 1300mm；All free sides, carry on the back real back of the body jail at empty top, top will with mine timber without exception
Top is connect, the empty top phenomenon of the side that must not have time；
The specification of the U-shaped canopy is the supporting of 29/kg/m, and U-shaped canopy width 124mm, thickness 16mm, canopy is away from 800mm, trouble
85 ° of angle, Cha Jiao are exactly the angle between stent strut leg and horizontal line.
Top plate of the present invention using inspection instrument for borehole detection Collapsed zone collapses administering method, wherein, step (7)
In, the outside diameter of the Grouting Pipe is 42mm, internal diameter 22mm, and grouting and reinforcing process specifically comprises the following steps：
In tunnel Collapsed zone, arrange a slip casting section every 1.6m, 8 slip castings length are arranged on each slip casting section
Drilling, hole depth 5000mm, squeezes into grouted anchor bar, installs Grouting Pipe slip casting, is deep at the top of long drilled holes, and sealing of hole and slip casting are described
The outside diameter of Grouting Pipe is 42mm, internal diameter 22mm；
First slip casting section is the cloth of 8 slip casting long drilled holes beyond inbreak region and back meet at 0.4m
The mode of putting is：Angle of branching off each one of two base angles of slip casting section, under slip casting long drilled holes herein is 40 °, and two apex angles are each
One, angle of branching off in slip casting long drilled holes herein is 35 °, and each one of portion of side centre position, two, top is evenly arranged, this is everywhere
Slip casting long drilled holes be each perpendicular to scar arrangement；
Grouting mode：Using longitudinally spaced grouting method, i.e., then first slip casting carries out multiple note, each at intervals of 3.2m
The grouting sequence of slip casting section is from bottom to top, first to note hole of base angle, then notes portion of side, finally notes roof hole, every row's slip casting.
Top plate of the present invention using inspection instrument for borehole detection Collapsed zone collapses administering method, wherein, the country rock
Estimation of stability judges by standard of the data of country rock rock quality designation RQD in coal mining geology data：When RQD 5-25 it
Between, represent that country rock is extremely unstable；When RQD represents that country rock is unstable between 25-50；When RQD represents stability between 50-75
Generally；When RQD represents more stable between 75-90；When RQD represents country rock stabilizer pole between 90-100；Provided at the same time with geology
The data of lithology Protodyakonov coefficient f judge for standard in material, represent that country rock is extremely unstable when f is less than 3；When f represents to enclose between 3-4
Rock is unstable；When f represents that stability is general between 4-6；When f represents more stable between 6-7；Country rock pole is represented when f is more than 7
Stablize, since complicated factor influences, two indexs need to be with reference to taking the two middle minimum to judge knot as surrounding rock stability
Fruit.
Top plate of the present invention using inspection instrument for borehole detection Collapsed zone collapses administering method, wherein, when inbreak cash
Stone not completely plugged tunnel when, illustrate that roof fall is not serious, people stand on the outside of Gangue, using caved gangue for shielding, i.e., sky push up
Place's spoil that drops can be all pounded on Gangue, will not be threatened to people, then from back inbreak edge with it is inner obliquely upward
Uniform drilling slip casting, waits to stablize and forms once supporting and then remove caved gangue on roadway floor, for inbreak region,
Real back of the body jail is carried on the back using mine timber, top will connect top, the empty top phenomenon of the side that must not have time, while use secondary supporting and reinforcing；
Secondary supporting：The grouted anchor bar that exposed once supporting uses is cut off, removes the jute of periphery, by top tray and wedge
Shape gasket and screw, manually apply 200KN moments of torsion；
Meanwhile the back excavated carried on the back using backboard it is tight, from outside to inside, downwind set U-shaped canopy by frame, it is U-shaped
Canopy moves towards 1 meter 1 along tunnel, and supporting is carried out to tunnel；
Iron backboard is set up between the U-shaped canopy and back, the iron backboard specification is：Length × width × height=930mm
× 150mm × 60mm, mono- piece of the 500 ± 50mm in interval, is evenly arranged the tightly back of the body jail that to stop, four iron pull rods of setting per canopy, in vault
Each one at the 500mm of line both sides, two help column leg away from bottom plate up each one at 1300mm；All free sides, without exception with hole at empty top
The real back of the body jail of the wood back of the body, top will connect top, the empty top phenomenon of the side that must not have time；
The specification of the U-shaped canopy is the supporting of 29/kg/m, and U-shaped canopy width 124mm, thickness 16mm, canopy is away from 800mm, trouble
85 ° of angle, Cha Jiao are exactly the angle between stent strut leg and horizontal line；
Grouting and reinforcing：
In tunnel Collapsed zone, arrange a slip casting section every 1.6m, 8 slip castings length are arranged on each slip casting section
Drilling, hole depth 5000mm, squeezes into grouted anchor bar, installs Grouting Pipe slip casting, is deep at the top of long drilled holes, and sealing of hole and slip casting are described
The outside diameter of Grouting Pipe is 42mm, internal diameter 22mm；
First slip casting section is the cloth of 8 slip casting long drilled holes beyond inbreak region and back meet at 0.4m
The mode of putting is：Angle of branching off each one of two base angles of slip casting section, under slip casting long drilled holes herein is 40 °, and two apex angles are each
One, angle of branching off in slip casting long drilled holes herein is 35 °, and each one of portion of side centre position, two, top is evenly arranged, this is everywhere
Slip casting long drilled holes be each perpendicular to scar arrangement；
Grouting mode：Using longitudinally spaced grouting method, i.e., then first slip casting carries out multiple note, each at intervals of 3.2m
The grouting sequence of slip casting section is from bottom to top, first to note hole of base angle, then notes portion of side, finally notes roof hole, every row's slip casting.
The present invention collapses administering method difference from prior art using the top plate of inspection instrument for borehole detection Collapsed zone and exists
In：
It is to reinforce sky by grouting filling that the present invention collapses administering method using the top plate of inspection instrument for borehole detection Collapsed zone
Push up area and be caving spoil and a kind of simple, safe and reliable processing method is provided fall of ground.The present invention is mainly by inbreak
The empty top zone domain that spoil is formed carries out punching slip casting, and using the bonding characteristic of filler, Collapsed zone and top rock mass are bonded
Together, form filler and connect top；Gangue is being caving into installation Grouting Pipe of drilling, it is special using bonding for grouting filling material
Property, broken spoil is consolidated, forms a metastable entirety, strengthens its globality.Relative to traditional way right
While caved gangue is removed, top connect with grillage to empty top zone, grillage lower section by tunnel design profile line install backboard and
Metallic support.Solve conventional art complex procedures, especially construction personnel and emit dead zone operation, the person in non-support for a long time
Safety is difficult to ensure that and connects very useful timber and easily rots in wet condition.So that the reparation in tunnel is simple, safety with
Ensure that roadway repair it is unimpeded after stabilization.
Below in conjunction with the accompanying drawings to the present invention using inspection instrument for borehole detection Collapsed zone top plate collapse administering method make into
One step explanation.
Brief description of the drawings
Fig. 1 is that the schematic diagram for surveying drilling is pried into the present invention；
Fig. 2 is the schematic diagram of empty top zone injected hole and caving zone injected hole in the present invention；
Fig. 3 is less than 1.5m for empty top zone volume in the present invention3Or during without empty top zone situation, the left view of Fig. 2；
Fig. 4 is more than 1.5m for empty top zone volume in the present invention3During situation, the left view of Fig. 2；
Fig. 5 is the schematic diagram that first circulation step pitch is excavated in the present invention；
Fig. 6 is the schematic diagram of Bracing Process after excavation first circulation step pitch in the present invention；
Fig. 7 is the drift section figure that U-shaped canopy is laid with the present invention；
Fig. 8 is the schematic diagram after roadway linking in the present invention；
Fig. 9 is the structure diagram of grouted anchor bar in the present invention；
Figure 10 is the partial enlarged view of injected hole in Fig. 9；
Figure 11 is the structure diagram of closed circle in the present invention；
Figure 12 is the bottom view of Figure 11；
Figure 13 is the layout drawing of 8 slip casting long drilled holes in the present invention；
Figure 14 is the Bracing Process schematic diagram when caved gangue not completely plugged tunnel in the present invention.
Embodiment
Embodiment 1
A kind of top plate using inspection instrument for borehole detection Collapsed zone collapses administering method, includes the following steps：
(1) roof fall seriousness judges：The whether completely plugged tunnel of caved gangue is judged according to caved gangue amount；When inbreak cash
During the completely plugged tunnel of stone, the stability of country rock is judged by Assessment of Surrounding Rock Stability, is divided into that country rock is extremely unstable, country rock is unstable
Fixed, surrounding rock stability is generally, country rock relatively stablizes and country rock stabilizer pole；
(2) drilling in the Gangue of drift section middle and upper part inbreak, length direction and the roadway floor place of drilling
Plane is in α angles, as shown in Figure 1, the scope at α angles is：
The extremely unstable condition lower angle of country rock is 63 °, and country rock instability condition lower angle is 49 °, and surrounding rock stability is general
Condition lower angle is 45 °, and country rock is 42 ° compared with stable condition lower angle, and country rock stabilizer pole condition lower angle is 28 °；
(because country rock is more unstable, height is bigger, this angle is rule of thumb drawn with theoretical calculation, main purpose
It is as far as possible by being disposably bored into up to inbreak vertex, so that accurate perception empty top zone volume and fracturation situation.)
(3) using rock breakdown situation above inspection instrument for borehole detection caved gangue, determine that the inbreak of back rock stratum is
It is no to form volume, empty top zone or the difference in height of caving zone vertex and back that sky pushes up, sky pushes up in the case of the empty top of formation,
At least one empty top zone injected hole and multiple caving zone injected holes are set according to detection event, as shown in Figure 2；
(4) slip casting and sealing of hole；
(5) tunnel：After the completion of slip casting, as shown in figure 5, the spoil of the goaf of back rock stratum inbreak formation and inbreak
Consolidation becomes a stable entirety under the action of piling up injection slurry, right along tunnel design profile line using YT28 type rock drills
The Gangue of back inbreak is excavated；
(6) supporting：As shown in fig. 6, when driving reaches a circulation step pitch 1m, stop driving, cut off exposed slip casting anchor
Bar, removes the jute of periphery, by top tray and taperliner and screw, manually applies 225KN moments of torsion；
Meanwhile as shown in Figure 7 and Figure 8, the back excavated carried on the back using backboard it is tight, from outside to inside, downwind by
Frame sets U-shaped canopy, and U-shaped canopy moves towards 1 meter 1 along tunnel, and supporting is carried out to tunnel；Repeat step (5) and step after completion supporting
(6), carry out in next step away from driving and support work, ensure under slip casting caving zone Excavation Length control 1m safe distances with
It is interior, until tunnel completely through；
(7) grouting and reinforcing：After the roadway linking of inbreak region, long drilled holes are designed, squeeze into grouted anchor bar, installation Grouting Pipe note
Slurry, is deep at the top of long drilled holes, sealing of hole and slip casting.
The method that above step has completed the present invention enough, on this basis, also with following preferred solution：
The set-up mode of empty top zone injected hole and caving zone injected hole is in step (3)：When there is 1.5m in empty top zone3Below or
When person does not have empty top zone, as shown in figure 3, only needing 1 empty top zone injected hole in empty top zone, extract inspection instrument for borehole out at this time, will walk
Suddenly the drilling in (2) is used as empty top zone injected hole, and is arranged in vertical multiple inbreaks in empty top zone injected hole lower part
Band injected hole；As shown in figure 4, when empty top zone is more than 1.5m3When, sealing pores are carried out to the drilling in step (2), while often
1.5m3Space 1 empty top zone injected hole is set, while be arranged in vertical multiple emit in each empty top zone injected hole lower part
Fall band injected hole；
Empty top zone injected hole and caving zone injected hole are evenly arranged on drift section, less than 1.5m3Press 1.5m3Calculate；Emit
Fall and determined with slip casting hole number according to the difference in height of caving zone vertex and back, difference in height sets one per 0.5m~0.8m
Caving zone injected hole, empty top zone injected hole, which must pass through to empty top zone, caving zone injected hole, runs through caving zone.
When inbreak strip length in tunnel is more than 3m, difference in height sets a caving zone injected hole per 0.5m~0.7m, works as lane
When inbreak strip length in road is less than 3m, difference in height sets a caving zone injected hole per 0.7m~0.9m, empty top zone injected hole and emits
Fall band injected hole and be more than 0.4m, empty top zone injected hole and caving zone with construction the distance between side back and inbreak junction
Between injected hole or the distance between two neighboring caving zone injected hole is not less than 0.1m.
Sealing of hole uses cork and Chinese ephedra；The sealed borehole length of empty top zone injected hole is not less than 300mm, caving zone injected hole
Sealed borehole length is the intersection point of straight line and back where the length direction of caving zone injected hole to the aperture of caving zone injected hole
Between air line distance.
When empty top zone injected hole insertion Grouting Pipe and caving zone injected hole insertion grouted anchor bar, it is also desirable to which sealing of hole, sealing of hole are adopted
It is sleeved on cork in Grouting Pipe or anchor pole, is then wrapped with jute, cork is stretched into injected hole together with grouted anchor bar,
In aperture, the instrument such as hammer is cork wedge jail.To prevent material from being flowed out from Grouting Pipe and hole wall gap location, reduce and waste, it is empty
Top area's injected hole sealed borehole length is not less than 300mm, and caving zone injected hole hole sealed borehole length is drilling and back plane point of intersection
Air line distance to aperture or so is suitable, this be in order to consider after caved gangue is removed according to tunnel contour line, can be right
Grouted anchor bar sets up pallet and screw, ensures the following caved gangue not slip casting of back plane, and the purpose so done has：When
Caved gangue not slip casting, worker can quickly remove caved gangue, reduce working strength and workload, reduce the working time, carry
High speed of application；Second, sealed borehole length from aperture to drilling and back plane point of intersection, ensures to remove according to tunnel contour line
After caved gangue, pallet and screw can be set up to grouted anchor bar, due to sealing of hole reason, end is simultaneously not affected by slurries and coagulates anchor pole
Gu waiting influences, sealing of hole stopper and jute can be removed after caved gangue is removed, be mounted directly pallet and screw, to top plate
Suspension roof support is carried out, pallet and screw are installed while bolt grouting, play the role of secondary supporting.
That injection slurry selects during slip casting in step (4) is your solid Asia G03 of mining chemical filler, by two-component bag
Component A and B component in your the solid Asia G03 of dress is with 1:1 volume ratio injection, after mixing, within the time of 150s its state by
Liquid is changed into solid, and during slip casting, the grouting pressure of empty top zone injected hole is between 1.5MPa-2MPa, the note of caving zone injected hole
Pressure control is starched between 1.3MPa-1.5MPa, suspends when grouting pressure is higher than this scope and notes again in a moment；
After Collapsed zone Gangue has injection slurry exudation, when injected hole is not into slurry, stop slip casting；Since tunnel is pushed up after slip casting
The empty top zone that slate layer inbreak is formed can be full of by the solid filling thing with certain caking property that injection slurry is formed, so that
Form filler and connect top；The Gangue of inbreak is consolidated into a metastable entirety under the cementation of injection slurry；
Empty top zone injected hole uses anchor cable machine drilling, and aperture Ф 32mm, the depth in hole is 5.5m；Caving zone injected hole is adopted
With air drill drilling, aperture Ф 38mm, depth 3.5m, and water and coal petrography powder in hole are blown with a device is swept, grouted anchor bar is inserted
Enter in hole, the exposed 50~70mm of grouted anchor bar, it is convenient to connect slip casting machine；
During slip casting, pay attention to checking whether other grouted anchor bars and coal wall have spillage phenomenon, during if any spillage phenomenon,
In the case of non-stop-machine, blocked with quick cement or Anchor Agent, after quick cement or Anchor Agent solidification, be further continued for noting
Slurry, continues to leak to prevent slurries, while the grouted anchor bar mark of leakage is clear.
As shown in Figure 9 and Figure 10, grouted anchor bar 1 is hollow type, long 3.5m, outside diameter 32mm, internal diameter 22mm, tensile strength
280KN；
The body of rod of the end 1.5mm of grouted anchor bar 1 is fabricated to helicitic texture 2, the high 1.5mm of thread of helicitic texture 2, spiral shell
Away from 12.5mm；The body of rod periphery of grouted anchor bar 1 is provided with a circle groove 3 and symmetrically arranged two injected holes 4 every 0.3m, recessed
The depth of groove 3 is 3mm, width 10mm；The bottom of 4 communication groove 3 of injected hole and the inner space of grouted anchor bar 1, injected hole 4
A diameter of 6mm, length 7mm, groove 3 is total to since the end of grouted anchor bar 1 and sets at 10, apart from end 0.05m at first
~0.1m, the front portion of grouted anchor bar 1 is conical design；There is no injected hole, such conical design contributes to anchor pole to enter drilling, preceding
Portion does not have an injected hole, and body periphery has that two injected holes are symmetrical every 0.3m, and anchor pole will not occur for so design inject to bore
Situation about being blocked after hole by the sandstone in front；The drilling of segmented can make caving zone slip casting uniform, and it is whole to ensure that caving zone is formed
Body, and it is connected with above rock integral, be not in collapse hole phenomenon, it is cost-effective, improve efficiency.
As is illustrated by figs. 11 and 12, grouted anchor bar 1 further includes closed circle 5, and quantity is consistent with the quantity of groove 3, closed circle 5
It is made of the body 6 of banded structure with two cylinders 7 being fixed thereon, the height of cylinder 7 is longer 2mm than the length of injected hole 4,
The diameter of cylinder 7 is consistent with the diameter of injected hole 4, and the length of body 6 is consistent with the girth for the circumference that the bottom of groove 3 is formed,
The equivalent width of width and groove 3, thickness are consistent with the depth of groove 3；Cylinder 7 is made of water uptake expansion material, and body 6 is by moulding
Material is made；
When closed circle 5 is enclosed around groove 3 one, just cylinder 7 can be inserted into injected hole 4, and projection is water swelling material, and compare
4 aperture of injected hole more 2mm with a distance from the body of rod inner surface of grouted anchor bar 1, when slip casting, it is former that projection water swelling forms self-locking
Reason, ensures closure effect, and the length for going deep into the cylinder 7 of slip casting passage is 2mm, and slip casting passage is blocked in too many easily expansion, very little
Self-locking is not had, therefore, scene uses and experiment thinks that the 2mm of the design is appropriate.
During use, the body 6 of banded structure, which encloses, to be fixed on groove 3, two cylinders 7 and two injected holes 4
With fixation, tightened in the outside of body 6 using steel disc pitch of the laps, be wrapped with jute.
The spacing and quantity of injected hole 4 influence 1 injection speed of grouted anchor bar, efficiency and tensile strength, and injected hole 4 is too close,
Quantity is too many, can reduce the tensile strength of anchor pole, while unnecessary slurries occurs and waste；Injected hole is too loose, quantity very little,
The tensile strength of grouted anchor bar 1 is smaller be subject to being influenced, but injection speed is too slow, and slip casting region of no pressure occurs, slip casting effect
Fruit can be greatly affected.
The size of injected hole 4 can also influence 1 injection speed of grouted anchor bar, efficiency and tensile strength, and the size of injected hole 4 is too
Greatly, the tensile strength of grouted anchor bar 1 can be seriously reduced, the size of injected hole 4 is too small, slip casting resistance increase, in the slip casting of standard
Under pressure, the injection speed of grouted anchor bar 1 can reduce, simultaneously because the setting rate of slurries is very fast, it is possible that aperture is attached
Nearly grout cures, cause illusion of slip casting completion etc., slip casting effect can be greatly affected.
Injected hole 4 and the Intensity Design apart from Main Basiss closed circle 5 of outer surface, closed circle 5 is at 1 end of grouted anchor bar
When slip casting is not required in one or several holes in portion, this effect can be reached by closing drilling with closed circle 5.
To sum up, the spacing of the injected hole of grouted anchor bar 1 and quantity and size design, are the implementation conditions in the present invention
Under, a kind of relatively rational design, is a kind of extraordinary preferred solution of effect.In practice, caving zone is entered according to anchor pole
Physical length, the injected hole in all areas below back all closes injected hole with closed circle, and uses steel outside
Piece pitch of the laps tightens, and is wrapped with jute.
Iron backboard is set up between U-shaped canopy and back, iron backboard specification is：Length × width × height=930mm × 150mm ×
60mm, is spaced mono- piece of 500 ± 50mm, is evenly arranged the tight back of the body jail that to stop, four iron pull rods, vault center line both sides are set per canopy
Each one at 500mm, two help column leg away from bottom plate up each one at 1300mm；All free sides, are carried on the back at empty top real with mine timber without exception
Back of the body jail, top will connect top, the empty top phenomenon of the side that must not have time；
The specification of U-shaped canopy is the supporting of 29/kg/m, and U-shaped canopy width 124mm, thickness 16mm, canopy is away from 800mm, Cha Jiao
85 °, Cha Jiao is exactly the angle between stent strut leg and horizontal line.
In step (7), the outside diameter of Grouting Pipe is 42mm, internal diameter 22mm, and grouting and reinforcing process specifically comprises the following steps：
As shown in figure 13, in tunnel Collapsed zone, arrange a slip casting section every 1.6m, 8 are arranged on each slip casting section
A slip casting long drilled holes, hole depth 5000mm, squeezes into grouted anchor bar, installs Grouting Pipe slip casting, is deep at the top of long drilled holes, and sealing of hole is simultaneously noted
Slurry, the outside diameter of Grouting Pipe is 42mm, internal diameter 22mm；
First slip casting section is the cloth of 8 slip casting long drilled holes beyond inbreak region and back meet at 0.4m
The mode of putting is：Angle of branching off each one of two base angles of slip casting section, under slip casting long drilled holes herein is 40 °, and two apex angles are each
One, angle of branching off in slip casting long drilled holes herein is 35 °, and each one of portion of side centre position, two, top is evenly arranged, this is everywhere
Slip casting long drilled holes be each perpendicular to scar arrangement；
Grouting mode：Using longitudinally spaced grouting method, i.e., then first slip casting carries out multiple note, each at intervals of 3.2m
The grouting sequence of slip casting section is from bottom to top, first to note hole of base angle, then notes portion of side, finally notes roof hole, every row's slip casting.
Assessment of Surrounding Rock Stability judges by standard of the data of country rock rock quality designation RQD in coal mining geology data：When
RQD represents that country rock is extremely unstable between 5-25；When RQD represents that country rock is unstable between 25-50；When RQD 50-75 it
Between represent stability it is general；When RQD represents more stable between 75-90；When RQD represents country rock stabilizer pole between 90-100；
Judge at the same time by standard of the data of lithology Protodyakonov coefficient f in geologic information, represent that country rock is extremely unstable when f is less than 3；When f exists
Represent that country rock is unstable between 3-4；When f represents that stability is general between 4-6；When f represents more stable between 6-7；When f is big
Country rock stabilizer poles are represented in 7, and since complicated factor influences, two indexs need to be with reference to taking the two middle minimum as country rock
Stability Judgement result.
Above is situation during the completely plugged tunnel of caved gangue, when caved gangue not completely plugged tunnel, such as schemes
Shown in 14, illustrate that roof fall is not serious, people stands on the outside of Gangue, and using caved gangue as shielding, i.e., the spoil that drops at empty top all can
Pound on Gangue, will not threaten to people, then from back inbreak edge with inner drilling slip casting uniform obliquely upward,
Wait to stablize and form once supporting and then remove caved gangue on roadway floor, for inbreak region, the real back of the body is carried on the back using mine timber
Jail, top will connect top, the empty top phenomenon of the side that must not have time, while use secondary supporting and reinforcing；
Secondary supporting：The grouted anchor bar that exposed once supporting uses is cut off, removes the jute of periphery, by top tray and wedge
Shape gasket and screw, manually apply 200KN moments of torsion；
Meanwhile the back excavated carried on the back using backboard it is tight, from outside to inside, downwind set U-shaped canopy by frame, it is U-shaped
Canopy moves towards 1 meter 1 along tunnel, and supporting is carried out to tunnel；
Iron backboard is set up between U-shaped canopy and back, iron backboard specification is：Length × width × height=930mm × 150mm ×
60mm, is spaced mono- piece of 500 ± 50mm, is evenly arranged the tight back of the body jail that to stop, four iron pull rods, vault center line both sides are set per canopy
Each one at 500mm, two help column leg away from bottom plate up each one at 1300mm；All free sides, are carried on the back at empty top real with mine timber without exception
Back of the body jail, top will connect top, the empty top phenomenon of the side that must not have time；
The specification of U-shaped canopy is the supporting of 29/kg/m, and U-shaped canopy width 124mm, thickness 16mm, canopy is away from 800mm, Cha Jiao
85 °, Cha Jiao is exactly the angle between stent strut leg and horizontal line；
Grouting and reinforcing：
In tunnel Collapsed zone, arrange a slip casting section every 1.6m, 8 slip casting jumping chisels are arranged on each slip casting section
Hole, hole depth 5000mm, squeezes into grouted anchor bar, installs Grouting Pipe slip casting, is deep at the top of long drilled holes, sealing of hole and slip casting, Grouting Pipe
Outside diameter be 42mm, internal diameter 22mm；
First slip casting section is the cloth of 8 slip casting long drilled holes beyond inbreak region and back meet at 0.4m
The mode of putting is：Angle of branching off each one of two base angles of slip casting section, under slip casting long drilled holes herein is 40 °, and two apex angles are each
One, angle of branching off in slip casting long drilled holes herein is 35 °, and each one of portion of side centre position, two, top is evenly arranged, this is everywhere
Slip casting long drilled holes be each perpendicular to scar arrangement；
Grouting mode：Using longitudinally spaced grouting method, i.e., then first slip casting carries out multiple note, each at intervals of 3.2m
The grouting sequence of slip casting section is from bottom to top, first to note hole of base angle, then notes portion of side, finally notes roof hole, every row's slip casting.
The removing work of the Gangue formed using the method for the present invention to the ore deposit section track lane roof strata large area inbreak
Make, have the characteristics that it is simple, efficient, reliable, and reparation after Drift stability be significantly improved.
More than embodiment be only the preferred embodiment of the present invention is described, not to the scope of the present invention into
Row limits, and on the premise of design spirit of the present invention is not departed from, those of ordinary skill in the art make technical scheme
The various modifications gone out and improvement, should all fall into the protection domain that claims of the present invention determines.
Claims (10)
1. a kind of top plate using inspection instrument for borehole detection Collapsed zone collapses administering method, it is characterised in that：Include the following steps：
(1) roof fall seriousness judges：The whether completely plugged tunnel of caved gangue is judged according to caved gangue amount；When caved gangue is complete
It is complete that the stability of country rock is judged by Assessment of Surrounding Rock Stability when blocking tunnel, be divided into country rock is extremely unstable, country rock is unstable,
Surrounding rock stability is general, country rock relatively stablizes and country rock stabilizer pole；
(2) drilling in the Gangue of drift section middle and upper part inbreak, length direction and the roadway floor place of the drilling
Plane is in α angles, and the scope at the α angles is：
The extremely unstable condition lower angle of country rock is 63 °, and country rock instability condition lower angle is 49 °, surrounding rock stability general condition
Lower angle is 45 °, and country rock is 42 ° compared with stable condition lower angle, and country rock stabilizer pole condition lower angle is 28 °；
(3) using inspection instrument for borehole detection caved gangue above rock breakdown situation, determine the inbreak of back rock stratum whether shape
Volume, empty top zone or the difference in height of caving zone vertex and back on empty top in the case of being pushed up into empty top, formation sky, according to
Detection event sets at least one empty top zone injected hole and multiple caving zone injected holes；
(4) slip casting and sealing of hole；
(5) tunnel：After the completion of slip casting, the inbreak of back rock stratum formed goaf and inbreak Gangue injection slurry work
Become a stable entirety with lower consolidation, using YT28 type rock drills, along tunnel design profile line, to back inbreak
Gangue is excavated；
(6) supporting：When driving reaches a circulation step pitch 1m, stop driving, cut off exposed grouted anchor bar, remove the Huang of periphery
Fiber crops, set up pallet and taperliner and screw, manually apply 225KN moments of torsion；
Meanwhile the back excavated carried on the back using backboard it is tight, from outside to inside, downwind set U-shaped canopy, U-shaped canopy edge by frame
Tunnel moves towards 1 meter 1, and supporting is carried out to tunnel；Complete supporting after repeat step (5) and step (6), carry out next step away from pick
Into and support work, ensure under slip casting caving zone Excavation Length control within 1m safe distances, until tunnel completely through；
(7) grouting and reinforcing：After the roadway linking of inbreak region, long drilled holes are designed, squeeze into grouted anchor bar, Grouting Pipe slip casting is installed, it is deep
Enter at the top of long drilled holes, sealing of hole and slip casting.
2. the top plate according to claim 1 using inspection instrument for borehole detection Collapsed zone collapses administering method, its feature exists
In：The set-up mode of empty top zone injected hole and caving zone injected hole is described in step (3)：When there is 1.5m in empty top zone3Below or
When person does not have empty top zone, 1 empty top zone injected hole is only needed in empty top zone, extracts inspection instrument for borehole out at this time, by the brill in step (2)
Hole is used as empty top zone injected hole, and is arranged in vertical multiple caving zone slip castings in the empty top zone injected hole lower part
Hole；When empty top zone is more than 1.5m3When, sealing pores are carried out to the drilling in step (2), while per 1.5m3Space set one
Empty top zone injected hole, while it is arranged in vertical multiple caving zone injected holes in each empty top zone injected hole lower part；
The empty top zone injected hole and the caving zone injected hole are evenly arranged on drift section, less than 1.5m3Press 1.5m3Meter
Calculate；The caving zone slip casting hole number according to the difference in height of caving zone vertex and back determine, difference in height per 0.5m~
0.8m sets a caving zone injected hole, and the empty top zone injected hole must pass through to empty top zone, the caving zone slip casting
Caving zone is run through in hole.
3. the top plate according to claim 2 using inspection instrument for borehole detection Collapsed zone collapses administering method, its feature exists
In：When inbreak strip length in tunnel is more than 3m, difference in height sets a caving zone injected hole per 0.5m~0.7m, works as tunnel
When inbreak strip length is less than 3m, difference in height sets a caving zone injected hole, the empty top zone slip casting per 0.7m~0.9m
Hole and the caving zone injected hole are more than 0.4m, the empty top zone with construction the distance between side back and inbreak junction
Between injected hole and the caving zone injected hole or the distance between the two neighboring caving zone injected hole is not less than 0.1m.
4. the top plate according to claim 3 using inspection instrument for borehole detection Collapsed zone collapses administering method, its feature exists
In：The sealing of hole uses cork and Chinese ephedra；The sealed borehole length of the empty top zone injected hole is not less than 300mm, the caving zone
The sealed borehole length of injected hole emits for the intersection point of straight line and back where the length direction of the caving zone injected hole described in
Fall the air line distance between the aperture with injected hole.
5. the top plate according to claim 4 using inspection instrument for borehole detection Collapsed zone collapses administering method, its feature exists
In：That injection slurry selects during slip casting in step (4) is your solid Asia G03 of mining chemical filler, and two-component is packed
Gu the component A and B component in your Asia G03 are with 1:1 volume ratio injection, after mixing, its state is by liquid within the time of 150s
It is changed into solid, during slip casting, the grouting pressure of the empty top zone injected hole is between 1.5MPa-2MPa, the caving zone injected hole
Grouting pressure control between 1.3MPa-1.5MPa, suspend when grouting pressure is higher than this scope and note again in a moment；
After Collapsed zone Gangue has injection slurry exudation, when injected hole is not into slurry, stop slip casting；Due to back rock after slip casting
The empty top zone that layer inbreak is formed can be full of by the solid filling thing with certain caking property that injection slurry is formed, so as to be formed
Filler connects top；The Gangue of inbreak is consolidated into a metastable entirety under the cementation of injection slurry；
The empty top zone injected hole uses anchor cable machine drilling, and aperture Ф 32mm, the depth in hole is 5.5m；The caving zone slip casting
Hole uses air drill drilling, aperture Ф 38mm, depth 3.5m, and blows water and coal petrography powder in hole with a device is swept, by slip casting anchor
Bar inserts in the hole, the exposed 50~70mm of grouted anchor bar, convenient to connect slip casting machine；
During slip casting, pay attention to checking whether other grouted anchor bars and coal wall have spillage phenomenon, during if any spillage phenomenon, not
In the case of shutdown, blocked with quick cement or Anchor Agent, after quick cement or Anchor Agent solidification, be further continued for slip casting,
Continue to leak to prevent slurries, at the same the grouted anchor bar mark of leakage is clear.
6. the top plate according to claim 5 using inspection instrument for borehole detection Collapsed zone collapses administering method, its feature exists
In：The grouted anchor bar is hollow type, long 3.5m, outside diameter 32mm, internal diameter 22mm, tensile strength 280KN；
The body of rod of the end 1.5mm of the grouted anchor bar is fabricated to helicitic texture, the high 1.5mm of thread of the helicitic texture,
Pitch 12.5mm；The body of rod periphery of the grouted anchor bar is provided with a circle groove and symmetrically arranged two slip casting every 0.3m
Hole, the depth of the groove is 3mm, width 10mm；The injected hole connects the bottom of the groove and the grouted anchor bar
Inner space, a diameter of 6mm of injected hole, length 7mm, the groove sets altogether since the end of the grouted anchor bar
Put at 10, apart from end 0.05m~0.1m at first, the front portion of the grouted anchor bar is conical design；
The grouted anchor bar further includes closed circle, and quantity is consistent with the quantity of the groove, and the closed circle is by banded structure
Body and two cylinders being fixed thereon are formed, and the height of the cylinder is longer 2mm than the length of the injected hole, the cylinder
Diameter it is consistent with the diameter of the injected hole, the girth one for the circumference that the bottom of the length of the body and the groove is formed
Cause, the equivalent width of width and the groove, thickness is consistent with the depth of the groove；The cylinder is by water uptake expansion material system
Into the body is made of plastics；
During use, the body of the banded structure is enclosed and is fixed on the groove, described two cylinders with it is described two
Injected hole matching is fixed, and is tightened in the outside of the body using steel disc pitch of the laps, is wrapped with jute.
7. the top plate according to claim 6 using inspection instrument for borehole detection Collapsed zone collapses administering method, its feature exists
In：Iron backboard is set up between the U-shaped canopy and back, the iron backboard specification is：Length × width × height=930mm ×
150mm × 60mm, is spaced mono- piece of 500 ± 50mm, is evenly arranged the tight back of the body jail that to stop, four iron pull rods, vault center line are set per canopy
Each one at the 500mm of both sides, two help column leg away from bottom plate up each one at 1300mm；All free sides, use mine timber at empty top without exception
The real back of the body jail of the back of the body, top will connect top, the empty top phenomenon of the side that must not have time；
The specification of the U-shaped canopy is the supporting of 29/kg/m, and U-shaped canopy width 124mm, thickness 16mm, canopy is away from 800mm, Cha Jiao
85 °, Cha Jiao is exactly the angle between stent strut leg and horizontal line.
8. the top plate according to claim 7 using inspection instrument for borehole detection Collapsed zone collapses administering method, its feature exists
In：In step (7), the outside diameter of the Grouting Pipe is 42mm, internal diameter 22mm, and grouting and reinforcing process specifically comprises the following steps：
In tunnel Collapsed zone, arrange a slip casting section every 1.6m, 8 slip casting jumping chisels are arranged on each slip casting section
Hole, hole depth 5000mm, squeezes into grouted anchor bar, installs Grouting Pipe slip casting, is deep at the top of long drilled holes, sealing of hole and slip casting, the note
The outside diameter for starching pipe is 42mm, internal diameter 22mm；
First slip casting section is the arrangement side of 8 slip casting long drilled holes beyond inbreak region and back meet at 0.4m
Formula is：Angle of branching off each one of two base angles of slip casting section, under slip casting long drilled holes herein is 40 °, each one of two apex angles,
Angle of branching off in slip casting long drilled holes herein is 35 °, and each one of portion of side centre position, two, top is evenly arranged, this note everywhere
Slurry long drilled holes are each perpendicular to scar arrangement；
Grouting mode：Using longitudinally spaced grouting method, i.e., then first slip casting carries out multiple note, each slip casting at intervals of 3.2m
The grouting sequence of section is from bottom to top, first to note hole of base angle, then notes portion of side, finally notes roof hole, every row's slip casting.
9. the top plate according to claim 8 using inspection instrument for borehole detection Collapsed zone collapses administering method, its feature exists
In：The Assessment of Surrounding Rock Stability judges by standard of the data of country rock rock quality designation RQD in coal mining geology data：When
RQD represents that country rock is extremely unstable between 5-25；When RQD represents that country rock is unstable between 25-50；When RQD 50-75 it
Between represent stability it is general；When RQD represents more stable between 75-90；When RQD represents country rock stabilizer pole between 90-100；
Judge at the same time by standard of the data of lithology Protodyakonov coefficient f in geologic information, represent that country rock is extremely unstable when f is less than 3；When f exists
Represent that country rock is unstable between 3-4；When f represents that stability is general between 4-6；When f represents more stable between 6-7；When f is big
Country rock stabilizer poles are represented in 7, and since complicated factor influences, two indexs need to be with reference to taking the two middle minimum as country rock
Stability Judgement result.
10. the top plate according to claim 1 using inspection instrument for borehole detection Collapsed zone collapses administering method, its feature exists
In：When caved gangue not completely plugged tunnel, illustrate that roof fall is not serious, people stand on the outside of Gangue, using caved gangue as
Shielding, i.e., the spoil that drops can be all pounded on Gangue at sky top, will not threaten to people, then from back inbreak edge with
In uniform drilling slip casting obliquely upward, wait stablize formed once supporting and then remove roadway floor on caved gangue, for
Inbreak region, real back of the body jail is carried on the back using mine timber, and top will connect top, must not be had time and be helped empty top phenomenon, while using secondary supporting and add
Gu；
Secondary supporting：The grouted anchor bar that exposed once supporting uses is cut off, removes the jute of periphery, by top tray and wedge piece
Piece and screw, manually apply 200KN moments of torsion；
Meanwhile the back excavated carried on the back using backboard it is tight, from outside to inside, downwind set U-shaped canopy, U-shaped canopy edge by frame
Tunnel moves towards 1 meter 1, and supporting is carried out to tunnel；
Iron backboard is set up between the U-shaped canopy and back, the iron backboard specification is：Length × width × height=930mm ×
150mm × 60mm, is spaced mono- piece of 500 ± 50mm, is evenly arranged the tight back of the body jail that to stop, four iron pull rods, vault center line are set per canopy
Each one at the 500mm of both sides, two help column leg away from bottom plate up each one at 1300mm；All free sides, use mine timber at empty top without exception
The real back of the body jail of the back of the body, top will connect top, the empty top phenomenon of the side that must not have time；
The specification of the U-shaped canopy is the supporting of 29/kg/m, and U-shaped canopy width 124mm, thickness 16mm, canopy is away from 800mm, Cha Jiao
85 °, Cha Jiao is exactly the angle between stent strut leg and horizontal line；
Grouting and reinforcing：
In tunnel Collapsed zone, arrange a slip casting section every 1.6m, 8 slip casting jumping chisels are arranged on each slip casting section
Hole, hole depth 5000mm, squeezes into grouted anchor bar, installs Grouting Pipe slip casting, is deep at the top of long drilled holes, sealing of hole and slip casting, the note
The outside diameter for starching pipe is 42mm, internal diameter 22mm；
First slip casting section is the arrangement side of 8 slip casting long drilled holes beyond inbreak region and back meet at 0.4m
Formula is：Angle of branching off each one of two base angles of slip casting section, under slip casting long drilled holes herein is 40 °, each one of two apex angles,
Angle of branching off in slip casting long drilled holes herein is 35 °, and each one of portion of side centre position, two, top is evenly arranged, this note everywhere
Slurry long drilled holes are each perpendicular to scar arrangement；
Grouting mode：Using longitudinally spaced grouting method, i.e., then first slip casting carries out multiple note, each slip casting at intervals of 3.2m
The grouting sequence of section is from bottom to top, first to note hole of base angle, then notes portion of side, finally notes roof hole, every row's slip casting.
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| CN201610499977.1A CN106150522B (en) | 2016-06-28 | 2016-06-28 | A kind of top plate using inspection instrument for borehole detection Collapsed zone collapses administering method |
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| CN109209395A (en) * | 2018-10-25 | 2019-01-15 | 山东东山新驿煤矿有限公司 | The technique of speedy drivage connection roadway in a kind of goaf |
| CN111764909B (en) * | 2020-06-22 | 2022-05-13 | 中铁四院集团工程建设有限责任公司 | Detection method for collapse state of loess stratum tunnel and treatment method after collapse |
| CN112405699A (en) * | 2020-11-03 | 2021-02-26 | 庄玉洪 | Peep and steal warning random hole puncher |
| CN115126505B (en) * | 2022-06-30 | 2023-01-06 | 国家能源投资集团有限责任公司 | Method for accurately improving stability of overlying strata structure |
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| FR2568244B1 (en) * | 1984-07-26 | 1992-01-10 | Soletanche | SPECIAL SEALING GROUT AND ITS USE FOR THE STORAGE OF WASTE CONTAINING METAL CATIONS |
| CN101349064B (en) * | 2008-08-26 | 2010-04-07 | 中国水利水电第五工程局 | Construction method of hydroelectric power station surge chamber vertical shaft under soft rock geological condition |
| CN101634231B (en) * | 2009-05-31 | 2011-08-10 | 山西晋城无烟煤矿业集团有限责任公司 | Method for reinforcing and sealing coal mine and preventing gas |
| CN102003189A (en) * | 2010-12-20 | 2011-04-06 | 中铁隧道集团有限公司 | Mold bag grouting method and device for quickly and uniformly reinforcing soft stratum |
| CN104763432B (en) * | 2015-01-27 | 2017-03-15 | 安徽理工大学 | A kind of method that high stress tunnel country rock release controls large deformation |
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