CN104453964B - A kind of telescopic anchor rope truss device and method for back supporting - Google Patents
A kind of telescopic anchor rope truss device and method for back supporting Download PDFInfo
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- CN104453964B CN104453964B CN201410817222.2A CN201410817222A CN104453964B CN 104453964 B CN104453964 B CN 104453964B CN 201410817222 A CN201410817222 A CN 201410817222A CN 104453964 B CN104453964 B CN 104453964B
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 69
- 239000010959 steel Substances 0.000 claims abstract description 69
- 239000011435 rock Substances 0.000 claims abstract description 42
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims abstract description 9
- 235000011613 Pinus brutia Nutrition 0.000 claims abstract description 9
- 241000018646 Pinus brutia Species 0.000 claims abstract description 9
- 238000001125 extrusion Methods 0.000 claims abstract description 9
- 231100000241 scar Toxicity 0.000 claims abstract description 9
- 238000005553 drilling Methods 0.000 claims description 6
- 230000001629 suppression Effects 0.000 claims description 6
- 239000002360 explosive Substances 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 230000004888 barrier function Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 7
- 230000003068 static effect Effects 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 241001347978 Major minor Species 0.000 description 2
- 230000002779 inactivation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 241000668854 Howardia biclavis Species 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010339 dilation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D17/00—Caps for supporting mine roofs
-
- 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
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The present invention discloses a kind of telescopic anchor rope truss device for back supporting, comprising: two anchor cables in being anchored at the boring of back both sides respectively；The combination beam being close on top board scar being connected respectively with the afterbody of two anchor cables；Wherein, combination beam, according to the size carrying active force during the horizontal movement of back rock stratum produced it, adjusts himself length, in order to suppresses or adapts to back lateral extrusion or pine expands deformation.The anchor rope truss device of the present invention, simple in construction, easy to use, when the horizontal movement of back rock stratum, girder steel distortion tears, get loose the technical barriers such as inefficacy to overcome tradition anchor beam structure；Additionally, the present invention also provides for a kind of using the said apparatus method to back supporting.
Description
Technical field
The invention belongs to colliery tunnel support technical field, particularly relate to a kind of telescopic anchor cable for back supporting
Girder device and method.
Background technology
In recent years, along with the increasing of pit mining scale, mining rate and mining depth, roadway surrounding rock pressure is gradually increased, especially
It is Geological Structure Effect region, not only shows in the increase of vertical stress, is more mainly manifested in the increase of horizontal stress.
For the horizontal stress impact on improving stability of surrounding rocks in roadway, Chinese scholars has carried out corresponding research, it is indicated that top, tunnel, base plate
The principal element destroyed is horizontal stress rather than vertical stress.Australia scholar proposes the maximum horizontal stress of suspension roof support
Theory, elaborates tunnelling direction and the biggest principal stress direction difference of Drift stability time different.Relevant experimental study shows:
Along with the increase of horizontal stress, anchor (bar) rope supported laneway top board presents stratiform roof completely failing, when horizontal stress is increased to necessarily
Degree, after anchoring body is all caving, also presents wedge shape inbreak outside anchorage zone.
At present, anchor (bar) rope supporting is widely used in colliery tunnel support field.Heavily stressed, the geology at reply mine
Very important effect has been played in a series of problems being unfavorable for roadway surrounding rock control such as complicated condition is unstable.But to being in height
Large section roadway under the conditions of horizontal stress and by adopting the gob side entry of dramatic impact, rock stratum horizontal movement and the tunnel caused
Top board extrudes-loosens dilatation large deformation and often moves towards along tunnel to form crushed zone, and easily induction roof fall is caving accident, ties up tunnel
Protect totally unfavorable with work surface safety in production.Traditional anchor (bar) rope support pattern does not the most adapt to back
Horizontal movement and the deformation failure that causes, it is mainly reflected in the most several aspect: monomer anchor (bar) rope is point load, supporting
Scope is little, protects table ability more weak；Anchor beam structure, such as anchor cable-W steel band of model, anchor cable-M steel band of model, anchor cable-reinforcing bar ladder beam,
Anchor cable-the combination such as steel channel beam, combination beam strengthening supporting structure extrudes-loosens in back horizontal movement in dilation process, easily
Cause steel band or girder steel to distort, tear, the phenomenon such as fracture, and protects the big heavy discount of table effect, and then causes combined support structure permanent
Losing efficacy, integer support intensity declines；Combination beam has obvious superiority in roadway support, be a kind of can be at back
Level and vertical provide the prestressing force supporting construction of compressive stress simultaneously, overcome monomer cable bolting and are not provided that horizontal tensioning
The defect of power, so that the body in anchorage zone is in multidimensional squeezed state, but in the horizontal movement crimp of back rock stratum
During, the combination beam being close to top board scar the most often gets loose failure phenomenon so that it is emit the support action rapid drawdown of top board and collapsing
Danger is the biggest.Back horizontal movement and the extruding pine enlargement deformation that causes even is caving roof fall accident and has had a strong impact on existing
The safety in production of generationization high-yield and high-efficiency fully-mechanized mining working.
Summary of the invention
The purpose of the present invention is contemplated to solve the problems referred to above, it is provided that a kind of telescopic anchor rope truss for back supporting fills
Putting, its simple in construction, easy to use, carrying produced by it can be made by a combination thereof beam according to during the horizontal movement of back rock stratum
Size firmly, adjusts himself length, reaches suppression or adapts to the purpose of back lateral extrusion-pine expansion deformation, and guaranteeing group
Close beam will not be distorted tear, the disconnection phenomenon such as inefficacy, prevent tunnel to be caving the generation of roof fall accident；Additionally, the present invention also carries
For a kind of method using said apparatus to carry out supporting.
For realizing the above-mentioned purpose of the present invention, a kind of telescopic anchor rope truss device for back supporting of the present invention includes:
Two anchor cables in being anchored at the boring of back both sides respectively；Be connected respectively with the afterbody of two anchor cables is close to top board rock
Combination beam on face；Wherein, described combination beam according to during the horizontal movement of back rock stratum to its produce carrying active force size,
Adjust himself length, in order to suppress or adapt to back lateral extrusion or pine expands deformation.
Wherein, described combination beam includes: girder；The auxiliary girder that its one end overlaps with girder one end；It is arranged on girder to take with auxiliary girder
The connection assembly of the section of connecing, together with being fixedly clamped girder with the lap segment of auxiliary girder.
Wherein, described girder and described auxiliary girder away from end be separately provided for the anchor cable hole that passes for described anchor cable.
Wherein, described girder includes major trough steel and a pair master being separately positioned on major trough steel cross section both sides moves close to somebody's ear；Described auxiliary girder includes pair
Channel-section steel and a pair pair being separately positioned on secondary channel-section steel cross section both sides are moved close to somebody's ear；Wherein, described major trough steel is inserted in one end of described secondary channel-section steel
One end, a pair pair of described secondary channel-section steel one end is moved close to somebody's ear to take respectively and is placed on a pair master of described major trough steel one end and moves close to somebody's ear；Wherein, described
The secondary outer surface of channel-section steel matches with the inner surface of described major trough steel.
Wherein, described connection assembly includes: be placed in the external splint outside described major trough steel one end, have be attached to respectively the pair of
The main outside stretch out in a pair external splint that a pair master move close to somebody's ear and move close to somebody's ear of moving close to somebody's ear；It is placed in described secondary inner splint within channel-section steel one end, tool
Have and be attached to the pair of pair respectively and move close to somebody's ear inside stretch out in a pair inner splint that a pair pair move close to somebody's ear and move close to somebody's ear；Secondary attached for stretching out in
The inner splint of ear is moved close to somebody's ear part and is stretched out in the bolt that the main external splint moved close to somebody's ear moves close to somebody's ear partly to be connected to one.
Additionally, the present invention also provides for a kind of method using device supported laneway top board as above, it comprises the steps:
Utilizing rock drill, the top board both sides Drilling respectively being positioned at same section in tunnel goes out a boring；
Utilize anchor cable agitator, rock drill and resin explosive roll, two anchor cables are anchored at respectively in two borings；
The afterbody of combination beam and two anchor cables is connected respectively, in order to combination beam is close on the scar of top board；
Utilize tensioner and anchor cable fastening assembly that two anchor cables are carried out stretch-draw pretension process respectively, in order to two anchor cables are combined beam even
Connect fixing；
It is characterized in that, described combination beam, according to the size carrying active force during the horizontal movement of back rock stratum produced it, adjusts
Himself length, in order to suppress or adapt to back rock stratum lateral extrusion or pine expands deformation.
Wherein, described combination beam includes: girder；The auxiliary girder that its one end overlaps with girder one end；It is arranged on girder and auxiliary girder is taken
The connection assembly of the section of connecing, together with being fixedly clamped girder with the lap segment of auxiliary girder.
Wherein, himself length of described combination beam regulation comprises the steps:
The active force causing described girder and described auxiliary girder to carry along its length when the horizontal movement of back rock stratum is less than or equal to
During the stiction resistance that described connection assembly produces when clamping described girder and auxiliary girder lap segment, described girder and described auxiliary girder overlap joint
Section does not carry out the adjustment of its length；
The active force causing described girder and described auxiliary girder to carry along its length when the horizontal movement of back rock stratum is more than described company
During the stiction resistance that connected components produces when clamping the lap segment of described girder and auxiliary girder, described girder and described auxiliary girder lap segment
Length is increased or decreased, in order to the total length of described girder and described auxiliary girder is reduced or increased.
Wherein, formed and there is the combination beam of described lap segment comprise the steps:
One end of described auxiliary girder pair channel-section steel is inserted in described girder major trough steel one end；
Move close to somebody's ear a pair pair of described secondary channel-section steel one end to take respectively and be placed on a pair master of described major trough steel one end and move close to somebody's ear；
Wherein, the described secondary outer surface of channel-section steel matches with the inner surface of described major trough steel.
Preferably, connection assembly is arranged on combination beam lap segment to comprise the steps:
The external splint connecting assembly is placed in the outside of described major trough steel one end, makes a pair external splint of external splint move close to somebody's ear to be attached to respectively
The pair of master moves close to somebody's ear outside stretch out in a pair master and move close to somebody's ear；
The inner splint connecting assembly is placed in the inside of described secondary channel-section steel one end, makes a pair inner splint of inner splint move close to somebody's ear to be attached to respectively
The pair of pair moves close to somebody's ear inside stretch out in a pair pair and move close to somebody's ear；
By bolt, move close to somebody's ear part and stretch out in the main external splint moved close to somebody's ear to move close to somebody's ear part fixing even by stretching out in the inner splint that pair moves close to somebody's ear respectively
Connect and be integrated.
Compared with prior art, a kind of telescopic anchor rope truss devices and methods therefor for back supporting of the present invention have as
Lower beneficial effect:
1) active force causing combination beam to carry along its length when the horizontal movement of back rock stratum is less than or equal to connection group
During the static friction force that part clamping produces, combined beam structure is stable, it is possible to plays suppression back lateral extrusion-pine and expands deformation
Effect；When the static friction force that the active force of combination beam carrying produces more than connection assembly clamping, the length of combination beam can
Appropriateness lengthen or reduce, with adapt to back lateral extrusion-loosen dilatation deformation, it is ensured that combination beam will not be distorted tear,
Disconnect the phenomenons such as inefficacy, thus prevent tunnel to be caving the generation of roof fall accident；
2) the anchor rope truss structure of the present invention can effectively solve be in the large section roadway of great horizontal stress condition and adopted play
Combination beam damage inactivation, supporting intensity that the gob side entry of strong impact expands deformation because of top board horizontal movement extruding-pine and causes decline
Etc. a difficult problem.
The present invention is described in detail below in conjunction with the accompanying drawings.
Accompanying drawing explanation
Fig. 1 is a kind of telescopic anchor rope truss schematic diagram for back supporting of the present invention；
Fig. 2 is the top view shown in Fig. 1；
Fig. 3 is the structural representation of the combination beam of the present invention；
Fig. 4 is I-I sectional view in Fig. 3.
Description of reference numerals: 1-tunnel；2-combination beam；2a-girder；21a-master moves close to somebody's ear；2b-auxiliary girder；21b-pair is moved close to somebody's ear；3-anchor
Rope；The main anchor cable hole of 4-, secondary anchor cable hole；5-connects assembly；5a-external splint；51a-external splint is moved close to somebody's ear；5b-inner splint；In 51b-
Clamping plate are moved close to somebody's ear；5c-bolt；6-back rock stratum；Portion of side, 7-tunnel.
Detailed description of the invention
As Figure 1-Figure 4, the present invention provides a kind of telescopic anchor rope truss device for back supporting, comprising:
Two anchor cables 3 in being anchored at the boring of top board both sides, tunnel 1 respectively；Being used for of being connected respectively with the afterbody of two anchor cables 3 is close to
Combination beam 2 on top board scar；Wherein, carrying effect that it is produced when combination beam 2 is according to 6 horizontal movement of back rock stratum
The size of power, adjusts himself length, in order to suppresses or adapts to back rock stratum 6 lateral extrusion or pine expands deformation.
In actual use, on the top board in tunnel, can arrange, along tunnel trend, the anchor rope truss structure that many sets are parallel continuously
(as shown in Figure 2), wherein, often the afterbody of the combination beam in set anchor rope truss structure and two anchor cables connects respectively, and two anchor cables
Two borings anchored should be positioned at same section top board both sides, tunnel, and tilts to portion of side, tunnel 7, in order to after being connected with combination beam
It is 10 °～the angle of 30 ° by the anchor cable of pretension and vertical direction, and each boring all should go deep into the stable nothing of rock stratum, back both sides
Fractured zone, thus ensure that every anchor cable all can play one's part to the full.
In the telescopic anchor rope truss device of the present invention, often set combination beam 2 can according to during 6 horizontal movement of back rock stratum to it
The size of the carrying active force produced, adjusts himself length, thus reach suppression or adapt to back rock stratum 6 lateral extrusion or
Pine expands the purpose of deformation.
Concrete, as it is shown on figure 3, the combination beam 2 of the present invention includes: girder 2a；Its one end is overlapped on one with one end of girder 2a
The auxiliary girder 2b risen；It is arranged on girder 2a and the connection assembly 5 of major-minor beam 2b lap segment, for taking girder 2a and auxiliary girder 2b
The section of connecing is fixedly clamped together.
The present invention by being inserted in girder certain length and making the inner surface tight connecting of auxiliary girder and girder, use multiple company the most again by auxiliary girder
Girder and auxiliary girder lap segment are fixedly clamped, when back rock stratum 6 level is transported by connected components (preferably, connecting assembly is 2-3)
The dynamic active force causing girder 2a and auxiliary girder 2b to carry along its length is less than or equal to connecting assembly clamping girder 2a and major-minor beam
Produced by 2b lap segment during static friction force, the Stability Analysis of Structures of whole combination beam, girder will not produce relative sliding with auxiliary girder lap segment
Dynamic such that it is able to play suppression back lateral extrusion-pine and expand the effect of deformation；And when girder 2a and auxiliary girder 2b side along its length
When the static friction force that the active force of carrying produces more than connection assembly clamping girder 2a and auxiliary girder 2b lap segment, girder 2a and pair
The length of beam 2b lap segment can be increased or decreased so that the entire length of whole combination beam is reduced or increased, so that combination beam can
Adapt to back lateral extrusion or loosening dilatation deformation, it is ensured that combination beam will not be distorted tear, disconnect the phenomenon such as inefficacy, guarantor
Card overall structure does not results in damage.Therefore, use the anchor rope truss structure of the present invention, can effectively solve to be in great horizontal stress
The large section roadway of condition and the combination beam being expanded deformation by the gob side entry adopting dramatic impact because of top board horizontal movement extruding-pine and causing
A degradation difficult problem under damage inactivation, supporting intensity.
Preferably, as shown in Figure 3, Figure 4, the girder 2a of the present invention includes major trough steel and is separately positioned on the outside of major trough steel both sides
A pair master protruded horizontally up moves close to somebody's ear 21a；Auxiliary girder 2b includes secondary channel-section steel and is separately positioned on secondary channel-section steel both sides and outwards protrude horizontally up
Pair is moved close to somebody's ear 21b；Wherein, major trough steel one end is inserted in one end of secondary channel-section steel, and a pair pair of secondary channel-section steel one end is moved close to somebody's ear 21b and taken respectively and be placed on
A pair master of major trough steel one end moves close to somebody's ear on 21a, and, the secondary outer surface of channel-section steel matches with the inner surface of major trough steel.
During making, girder and auxiliary girder are made by short channel-section steel, and main moving close to somebody's ear moves close to somebody's ear all to use process for stamping to be made with pair；Then,
Auxiliary girder is inserted in girder makes both overlap certain length, and intersection i.e. forms the described lap segment of combination beam.When making, should make
The physical dimension of auxiliary girder matches with the physical dimension of girder, in order to when auxiliary girder is inserted in girder, the outer surface of auxiliary girder and the interior table of girder
Face can mutual tight connecting.After girder, auxiliary girder form lap segment, it is inserted in 2-3 in lap segment and connects assembly 5, and by pre-
The method being close to connected components bolt, connects as one girder and auxiliary girder.Preferably, girder and auxiliary girder coincidence in an initial condition
Partial-length can determine according to actually used demand, and prefastening torque during pretension bolt sets on request.
Wherein, as shown in Figure 3, Figure 4, the connection assembly 5 of the present invention includes: be placed in the external splint 5a outside major trough steel one end,
Have for being attached to a pair master respectively that to move close to somebody's ear 21a outside and stretch out in a pair master and move close to somebody's ear a pair external splint of 21a and move close to somebody's ear 51a；Dispose
At the inner splint 5b that secondary channel-section steel one end is internal, have and move close to somebody's ear inside 21b and stretch out in a pair pair to move close to somebody's ear for being attached to a pair pair respectively
A pair inner splint of 21b moves close to somebody's ear 51b；For moving close to somebody's ear the inner splint of 21b move close to somebody's ear 51b part and stretch out in the main 21a that moves close to somebody's ear by stretching out in pair
External splint move close to somebody's ear the 51a bolt 5c that is connected to one of part.
Owing to the girder of the present invention, auxiliary girder are all in matrix, and inner splint is placed in the inner surface of auxiliary girder, and external splint is placed in outside girder
Surface, therefore, inner splint and external splint are the most respectively in matrix, and should make the physical dimension of inner splint and the physical dimension phase of auxiliary girder
Join, make the physical dimension of external splint match with the physical dimension of girder, in order to inner splint, auxiliary girder, girder, external splint are assembled
Time together, the surface that adjacent two parts contact can mutual tight connecting, thus increase the contact surface between adjacent two parts
Long-pending.
Wherein, a pair inner splint moves close to somebody's ear to move close to somebody's ear to connect by tools for bolts ' pretension is fixing respectively with a pair external splint, same owing to being positioned at combination beam
The inner splint of side is moved close to somebody's ear and external splint move close to somebody's ear between have certain spacing (this spacing and main move close to somebody's ear, thickness sum phase that pair is moved close to somebody's ear
When), therefore, when connecting using bolt to be moved close to somebody's ear by above-mentioned inside and outside clamping plate, tools for bolts ' pretension moment of torsion is the biggest, and it is moved close to somebody's ear by inside and outside clamping plate
Between spacing the least, connect assembly clamping girder and during auxiliary girder produced stiction the biggest.And owing to connecting assembly and master
The existence of stiction between beam, auxiliary girder so that the combination beam 2 of the present invention can be according to during 6 horizontal movement of back rock stratum pair
The size of the carrying active force that it produces, adjusts the length of himself, in order to reaches suppression or adapts to back lateral extrusion-pine expansion
The purpose of deformation.
Wherein, in order to two anchor cables being connected as one with combination beam, combination beam girder and auxiliary girder away from end be respectively provided with
There is the anchor cable hole for passing for anchor cable.
Concrete, the other end at girder 2a major trough steel is provided with the Bower Anchor rope for connecting an anchor cable afterbody in two anchor cables 3
Hole 4, the other end at auxiliary girder 2b pair channel-section steel is provided with the secondary anchor cable hole 4 for connecting another root anchor cable afterbody in two anchor cables 3,
By two anchor cable afterbodys being respectively penetrated main anchor cable hole, secondary anchor cable hole, then pass through tensioner and anchor cable 3 fastening assembly to every
Anchor cable carries out stretch-draw pretension, and combination beam 2 can be made to be close on the scar of back, thus by anchor cable and combination beam, to lane
Road top board carries out effective support.
Except above-mentioned telescopic anchor rope truss device, the present invention also provides for using above-mentioned telescopic anchor rope truss device to tunnel
Top board carries out the method for supporting, and the method comprises the steps:
Utilizing rock drill, the top board both sides Drilling respectively being positioned at same section in tunnel goes out a boring；
Utilize anchor cable 3 agitator, rock drill and resin explosive roll, the termination of two anchor cables 3 is anchored at respectively in two borings；
The afterbody of combination beam 2 with two anchor cables 3 is connected respectively；
Utilize tensioner and anchor cable fastening assembly that two anchor cables 3 are carried out stretch-draw pretension process respectively, in order to combination beam 2 is close to top
On the scar of plate；
Wherein, combination beam 2, according to the size carrying active force during 6 horizontal movement of back rock stratum produced it, adjusts himself
Length, in order to suppress or adapt to lateral extrusion or the effect of pine expansion deformation of back.
Wherein, combination beam 2 regulates himself length and comprises the steps:
The active force causing girder and auxiliary girder to carry along its length when back rock stratum 6 horizontal movement is less than or equal to connection group
During the stiction resistance produced when part clamping girder and auxiliary girder lap segment, girder and auxiliary girder lap segment do not carry out the adjustment of its length；
The active force causing girder and auxiliary girder to carry along its length when back rock stratum 6 horizontal movement clamps more than connecting assembly
During the stiction resistance produced during the lap segment of girder and auxiliary girder, the length of girder and auxiliary girder lap segment is increased or decreased, in order to group
The total length closing beam is reduced or increased.
Wherein, formed and there is the combination beam of lap segment comprise the steps:
One end of auxiliary girder 2b pair channel-section steel is inserted in girder 2a major trough steel one end；
A pair pair of secondary channel-section steel one end is moved close to somebody's ear 21b and takes respectively and be placed on a pair master of major trough steel one end and move close to somebody's ear on 21a；
Wherein, during design, the secondary outer surface of channel-section steel should be made to match with the inner surface of major trough steel.
Wherein, connection assembly 5 is arranged on combination beam lap segment to comprise the steps:
The external splint 5a connecting assembly 5 is placed in the outside of secondary channel-section steel one end, makes a pair external splint of external splint 5a move close to somebody's ear 51a and divide
Not being attached to a pair pair, to move close to somebody's ear 21b outside and stretch out in a pair pair and move close to somebody's ear 21b；
The inner splint 5b connecting assembly 5 is placed in the inside of major trough steel one end, makes a pair inner splint of inner splint 5b move close to somebody's ear 51b
Being attached to a pair master respectively, to move close to somebody's ear 21a internal and stretch out in a pair master and move close to somebody's ear 21a；
By bolt 5c, move close to somebody's ear the external splint of 21b move close to somebody's ear 51a part and stretch out in the main inner clip moving close to somebody's ear 21a by stretching out in pair respectively
Plate is moved close to somebody's ear 51b part and is connected to one, in order to the lap segment of girder, auxiliary girder is clamped, and is turned round by the pretension of regulation bolt
Square, regulation connects assembly and girder, the stiction of auxiliary girder lap segment junction.
In concrete Bracing Process, as required, on the top board of tunnel 1, move towards along tunnel to arrange multiple continuous print telescopics
Anchor rope truss device, and multiple telescopic anchor rope truss device is parallel to each other.
Wherein, each telescopic anchor rope truss device is arranged in the following order:
1, boring.Using rock drill to dig two borings on the top board of tunnel 1, two borings are in same section top board both sides, and to
Portion of side 7, tunnel fillet tilts.When drilling operation, should according to the line between the anchor cable hole on the boring designed and combination beam with
Between vertical direction, the required angle formed determines the position of each boring, it is preferred that this angle is 10 °～30 ° of angles, and,
During drilling operation, Drilling each boring out all should go deep into back both sides rock stability without Fractured zone, to ensure that anchor cable can fill
Divide and play a role.
2, anchor cable end anchorage.Use anchor cable to push at the bottom of hole by resin explosive roll, utilize anchor cable agitator by anchor cable afterbody and rock drill phase
Even, starting and rise rock drill, propelling limit, limit is stirred, and anchor cable termination stops creeping into after pushing foot of hole, after being stirred for 10～15s
Shut down；
3, combination beam is installed.After two anchor cable terminations anchor completely, by the anchor cable hole at two anchor cable afterbodys and combination beam two ends one by one
Correspondence also penetrates wherein, so that combination beam is close on top board scar；
4, stretch-draw pretension anchor cable.At anchor cable afterbody, small raft, clip type lockset are installed successively, re-use Special tension facility stretch-draw pre-
Tightly, then use same procedure stretch-draw pretension opposite side anchor cable, thus back is carried out supporting.
Although the present invention has been described above with particularity, but the invention is not restricted to this, those skilled in the art can be according to this
Bright principle is modified, and therefore, the various amendments that all principles according to the present invention are carried out all should be understood to fall into the guarantor of the present invention
Protect scope.
Claims (8)
1. the telescopic anchor rope truss device for back supporting, it is characterised in that including:
Two anchor cables in being anchored at the boring of back both sides respectively；
The combination beam being close on top board scar being connected respectively with the afterbody of two anchor cables；
Wherein, described combination beam, when the horizontal movement of back rock stratum, can adjust length according to the size of self carrying active force, with
Just suppress or adapt to back rock stratum lateral extrusion or pine expands deformation；
Combination beam includes:
Girder；
The auxiliary girder overlapped with girder one end；
It is arranged on the connection assembly of girder and auxiliary girder lap segment, together with being fixedly clamped with the lap segment of auxiliary girder by girder；
Wherein:
Described girder includes major trough steel and a pair master being separately positioned on major trough steel both sides moves close to somebody's ear；
Described auxiliary girder includes secondary channel-section steel and a pair pair being separately positioned on secondary channel-section steel both sides is moved close to somebody's ear；
Described major trough steel one end is inserted in one end of described secondary channel-section steel, and a pair pair of described secondary channel-section steel one end is moved close to somebody's ear to take respectively and be placed on institute
A pair master stating major trough steel one end moves close to somebody's ear；
The described secondary outer surface of channel-section steel matches with the inner surface of described major trough steel.
Telescopic anchor rope truss device the most according to claim 1, it is characterised in that described girder is mutually remote with described auxiliary girder
From end be separately provided for the anchor cable hole that passes for described anchor cable.
Telescopic anchor rope truss device the most according to claim 1, it is characterised in that described connection assembly includes:
It is placed in the external splint outside described major trough steel one end, has and be attached to the pair of master respectively and move close to somebody's ear outside stretch out in a pair master
A pair external splint moved close to somebody's ear is moved close to somebody's ear；
It is placed in described secondary inner splint channel-section steel one end within, has and be attached to the pair of pair respectively and move close to somebody's ear inside stretch out in a pair pair
A pair inner splint moved close to somebody's ear is moved close to somebody's ear；
For moving close to somebody's ear part and stretch out in the main external splint moved close to somebody's ear and move close to somebody's ear part and be connected to one by stretching out in the inner splint that pair moves close to somebody's ear
Bolt.
4. the method using device supported laneway top board as described in any one of claim 1-3, it is characterised in that include as
Lower step:
Utilizing rock drill, the top board both sides Drilling respectively being positioned at same section in tunnel goes out a boring；
Utilize anchor cable agitator, rock drill and resin explosive roll, two anchor cables are anchored at respectively in two borings；
The afterbody of combination beam and two anchor cables is connected respectively, in order to make combination beam be close on the scar of top board；
Utilize tensioner and anchor cable fastening assembly that two anchor cables are carried out stretch-draw pretension process respectively, in order to two anchor cables are combined beam even
Connect fixing；
Described combination beam, when the horizontal movement of back rock stratum, can adjust length according to the size of self carrying active force, in order to suppression
Or adapt to back rock stratum lateral extrusion or pine expansion deformation.
The method of supported laneway top board the most according to claim 4, it is characterised in that described combination beam includes:
Girder；
The auxiliary girder overlapped with girder one end；
It is arranged on the connection assembly of girder and auxiliary girder lap segment, together with being fixedly clamped with the lap segment of auxiliary girder by girder.
The method of supported laneway top board the most according to claim 5, it is characterised in that described combination beam adjusts its length bag
Include following steps:
When the horizontal movement of back rock stratum causes the active force of described girder and auxiliary girder carrying to clamp less than or equal to described connection assembly
During the stiction resistance produced when described girder and auxiliary girder lap segment, described girder and auxiliary girder lap segment do not carry out the tune of its length
Whole；
When the horizontal movement of back rock stratum causes the active force of described girder and the carrying of described auxiliary girder to clamp institute more than described connection assembly
During the stiction resistance produced when stating the lap segment of girder and auxiliary girder, the length increasing of described girder and described auxiliary girder lap segment adds deduct
Little, in order to the total length of described girder and described auxiliary girder is reduced or increased.
The method of supported laneway top board the most according to claim 5, it is characterised in that form the combination with described lap segment
Beam comprises the steps:
One end of described auxiliary girder pair channel-section steel is inserted in described girder major trough steel one end；
Move close to somebody's ear a pair pair of described secondary channel-section steel one end to take respectively and be placed on a pair master of described major trough steel one end and move close to somebody's ear；
Wherein, the described secondary outer surface of channel-section steel matches with the inner surface of described major trough steel.
The method of supported laneway top board the most according to claim 7, it is characterised in that connection assembly is arranged on combination beam and takes
The section of connecing comprises the steps:
The external splint connecting assembly is placed in the outside of described major trough steel one end, makes a pair external splint of external splint move close to somebody's ear to be attached to respectively
The pair of master moves close to somebody's ear outside stretch out in a pair master and move close to somebody's ear；
The inner splint connecting assembly is placed in the inside of described secondary channel-section steel one end, makes a pair inner splint of inner splint move close to somebody's ear to be attached to respectively
The pair of pair moves close to somebody's ear inside stretch out in a pair pair and move close to somebody's ear；
By bolt, move close to somebody's ear part and stretch out in the main external splint moved close to somebody's ear to move close to somebody's ear part fixing even by stretching out in the inner splint that pair moves close to somebody's ear respectively
Connect and be integrated.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410817222.2A CN104453964B (en) | 2014-12-24 | 2014-12-24 | A kind of telescopic anchor rope truss device and method for back supporting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410817222.2A CN104453964B (en) | 2014-12-24 | 2014-12-24 | A kind of telescopic anchor rope truss device and method for back supporting |
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| CN104453964A CN104453964A (en) | 2015-03-25 |
| CN104453964B true CN104453964B (en) | 2016-08-17 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107461215A (en) * | 2017-08-29 | 2017-12-12 | 河南理工大学 | A kind of back timber formula anchor cable constant-resistance structure and its installation method |
| CN108167004A (en) * | 2017-12-11 | 2018-06-15 | 中国矿业大学(北京) | A kind of tunnel sliding rail type girders anchorage cable method for protecting support and suspension device |
| CN108150186B (en) * | 2017-12-11 | 2019-04-09 | 中国矿业大学(北京) | A kind of a wide range of method for protecting support and suspension device of tunnel girders anchorage cable |
| CN109441500A (en) * | 2018-10-22 | 2019-03-08 | 山东新阳能源有限公司 | A kind of girder truss advanced stand device and method for protecting support |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3503012A1 (en) * | 1985-01-30 | 1986-07-31 | Dyckerhoff & Widmann AG, 8000 München | TENSIONING DEVICE FOR THE TIE LINK OF AN ANCHOR, ESPECIALLY A ROCK ANCHOR |
| CN201347765Y (en) * | 2009-02-09 | 2009-11-18 | 中国矿业大学 | Yielding anchor cable |
| CN102182483A (en) * | 2011-04-26 | 2011-09-14 | 山东大学 | Semi-rigid abnormal beam anchor cable truss roadway supporting system |
| CN103953360B (en) * | 2014-04-18 | 2016-06-29 | 湖南科技大学 | A kind of U-shaped steel for deep roadway with large deformation and the collaborative supporting construction of anchor cable |
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