CN102979542A - Bolt-mesh-cable support technology - Google Patents
Bolt-mesh-cable support technology Download PDFInfo
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- CN102979542A CN102979542A CN201210528000XA CN201210528000A CN102979542A CN 102979542 A CN102979542 A CN 102979542A CN 201210528000X A CN201210528000X A CN 201210528000XA CN 201210528000 A CN201210528000 A CN 201210528000A CN 102979542 A CN102979542 A CN 102979542A
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Abstract
The invention relates to an advanced bolt-mesh-cable support technology, which comprises a series of steps of drilling anchor rod holes, installing a top anchor rod, installing an upper anchor rod, drilling an anchor cable hole and installing an anchor cable. Due to the adoption of the bolt-mesh-cable support technology, the support safety is greatly improved. The bolt-mesh-cable support technology can be used for supporting different complicated roadways.
Description
Technical field
The present invention relates to a kind of support with anchor cable network technique.
Background technology
Safe, efficient, economic Roadway Support Technology is the necessary condition that guarantees mine safety, High-efficient Production.Bolt support technology abroad important producing coal country is widely applied, wherein typical with the U.S., Australia, this and their coal seam geological condition be fairly simple, it is closely related to bury shallow and national this technology of attention, formed from complete support technology systems such as design of its support, matching operation facility, the serial bolting and rope support product that is applicable to different condition and reliable monitoring meanss, whole system is science, safety and reliable comparatively.According to incompletely statistics, the tunnel total length of China's annual new driving in state-owned big-and-middle-sized colliery wherein is coal road and half coal rock tunnel more than 80% up to kilometers up to ten thousand.By 2005, the coal road bolting cable bolting rate of State owned coal mine reached 60%, and some mining area surpasses 90%, even reaches 100%, anchor pole and/or cable bolting become China's coal-mine tunnel first-selection, main support form safely and efficiently.Concrete bolting and rope support technique is there are no special report.
Technical scheme
The present invention has provided a kind of support with anchor cable network technique, improves tunnelling speed with the supporting step that provides system.
Description of drawings
Accompanying drawing 1 is top, tunnel, base plate lithological column;
Accompanying drawing 2 is 1-1 section supporting schematic diagram;
Accompanying drawing 3 is 2-2 section support with anchor cable network schematic diagram;
Accompanying drawing 4 is TU type supporting schematic diagram.
Concrete steps comprise:
32 coal seams are the main mining coal seam in mining area, are positioned at the Shihezi Formation bottom, the thick 0.58～8.22m in coal seam, the average thick 2.89m of coal.Coal seam thickness sees generally that except thinner maybe can not the adopting (356 hole) of indivedual somes the thickness of coal point is all more than 2～3m.The coal seam contains coal area 49.61km2, can adopt area 49.55km2, can adopt coefficient and reach 99.9%, the more stable Main workable coal seams that can adopt for the whole district.Coal bed texture is complicated, and the tool dirt band can be adopted 49 points that have of seeing dirt band one deck in the coal point for 116,2 layers 29 points are arranged, 16 points are arranged more than 3 layers.Dirt band is take mud stone and carbonaceous mud stone as main, and minority is for containing the charcoal mud stone.Top board, base plate lithology are take mud stone as main, and inferior is siltstone and packsand.32 coal seams all are that non-igneous rock is invaded the district.Concrete heading top, base plate lithological column restrain referring to accompanying drawing 1, are specially
1, top board
The coal seam immediate roof is take the Dark grey mud stone as main, average thick about 4.34m, and the part is the Dark grey siltstone: old top is mud stone or powder packsand.
The coal seam lithology that makes progress is followed successively by:
Mud stone, average thickness 4.34m, Dark grey, argillaceous texture contains the fossil fragment, contains the vitrain band;
Coal, average thickness 0.19m, black, unstable;
Mud stone, average thickness 1.15m, Dark grey, bulk, property is crisp, contains chiltern and fossil plant;
Packsand, average thickness 0.73m, grey, particulate is block, and composition is take quartzy, feldspar as main, calcite cementation, property is crisp, contains sparring, and there is the crack part.
Coal, average thickness 0.12m, black.
Mud stone, average thickness 3.87m, grey～Dark grey, fine and close, bulk, the flat condition fracture, more aleuritic texture is contained in the part.
Packsand, average thickness 3.20m, grey～celadon, particulate, diagonal bedding, composition is take quartzy feldspar as main, and is siliceous cementing, cranny development, calcite veins filling.
Mud stone, 11.50 meters of average thickness, grey～Dark grey, bulk, argillaceous texture, siltstone is contained in the part, sees sliding surface, and crack, sliding surface are grown, and the calcite veins filling contains the plant roots and stems fossil.
Packsand, average thickness, 9.53 meters, green grey～grey acinose texture, bulk～stratiform, composition is take quartz, feldspar as main, and calcite cementation has the crack, contains calcite veins, accidental stone arteries and veins and plant roots and stems fossil.
2, base plate
The coal seam immediate bottom is one deck mud stone, average thick about 2.93m, and past is packsand.
The downward lithology in coal seam is followed successively by: mud stone, and average thickness 2.93m, grey～Dark grey, property is crisp, bulk, the flat condition fracture, chiltern is arranged at top, and there is the crack part, and aspect contains calcareous and fossil plant.
Packsand, average thick 1.73m, grey, bulk, the fine grained sand structure, composition contains melanocratic mineral less take quartz, feldspar as main, argillaceous agglutination, fracture is smooth, and there is calcite veins filling crack the part;
Coal, average thickness 0.25m, black, bulk～chunky shape is comprised of dull coal, durite.
Packsand, average thickness 9.5m, grey～Dark grey, middle particulate, bulk, composition is take quartzy, feldspar as main station section stratiform, calcite cementation, the part is contained thin layers of mudstone and is seen the crack;
Coal, average thickness 0.29m, black;
Mud stone, average thickness 20.57m, grey, argillaceous texture, bulk contains a large amount of aleuritic textures.
The K3 sandstone, 7.47 meters of average thickness, light gray～canescence, little band kermesinus, composition is take quartz, feldspar as main, and is siliceous cementing, quartz particles is larger, contains the sparring oolith, a small amount of shale inclusion, sorting, rounding are relatively poor, and property is hard, grows unstable, local agensis, only be the thin layer siltstone, the bottom cranny development is basal water under 32 coals.Design of bolt support is the rational important guarantee of roadway bolt support technology reliable and economic, and present roadway bolt support design method can be summed up as three classes basically: engineering analog method, theoretical calculation and multidate information design method.Qian Yingzi pit coal lane Design of bolt support adopts the multidate information design method.Design procedure comprises: testing site investigation and evaluation of geological mechanic, and initial designs, underground monitoring and information feedback are revised design and daily monitoring, and the Design of bolt support method is seen Fig. 2.
Outstanding rational design must be based upon that roadway surrounding rock geomechanics data and actual production are technical comprehensively and accurately, and therefore, evaluation of geological mechanic is the guide of initial designs, and design is had very important effect.Mainly comprise: 1.. the geostatic stress test.The size and Orientation of geostatic stress is very large on tunnel layout and Design of bolt support impact, has become the important foundation data of Design of bolt support.2.. tunnel status investigation and the parameter testing of roadway surrounding rock mechanical property.Mainly comprise: the roadway surrounding rocks such as the Distortion Disciplinarian under adjoining rock number and bed thickness, joint, rock stratum, fracture spacing, the existing supporting condition in tunnel, modulus of elasticity, poisson's ratio, resistance to compression and the tensile strength of rock stratum, cohesion, angle of internal friction are composed and are deposited situation and mechanical property parameter.3.. anchor rod component mechanical property and the test of Anchor Agent adhesion strength.Resistance to compression, tensile strength and the anchor pole elongation per unit length such as test anchor pole, supporting plate, and Anchor Agent adhesion strength field measurement.
3212 liang of lanes are safeguarded and are presented following feature: 1.. the tunnel buried depth is large (the darkest nearly 650m), near deep-well roadway in high strata pressure supporting problem.2.. back is the weak compound roof of the thick-layer of thick-layer Sandy Silt, mud stone and seam, and thickness can reach about 7m, and anchor cable can't go deep into old top sandstone under the general condition.32 coal roof rock cracks, bedding are relatively grown, and intensity is low, and integrality is poor.3.. the structure such as tunnelling process interrupting layer is more, cause top, 32 coal seams end country rock more broken, and the water outlet phenomenon is comparatively serious in drilling construction, and significantly not regular.
For 3212 air way engineering features, the basic supporting mode that proposes to adopt is: the supporting of high-performance anchor band rete cord.Top board and section of side all adopt the high-performance bolt support, strengthen to greatest extent anchorage length and scope, protect top, ribbon steel wall supporting in conjunction with T-shaped (or M type) steel band, and top, side all adopt diamond mesh, steel-plastic net, steel mesh reinforcement to be close to scar and protect top, wall supporting.For the large tunnel of the serious and broken scope of part roof cracking, the reinforcement support pattern that can adopt is: the inner grouting and reinforcing of country rock.For this reason, adopt following key technology means:
(1) high-intensity bolt support technology: the high-performance anchor pole that adopts the special screw thread steel to process, the anti-rupture strength of this anchor pole is high, and support rigidity is larger, and restrained deformation is stronger; Large rigidity annex (M type or T-steel band, large pallet, net); Lengthen or full length fastening; Adopt pneumatic wrench can realize the pretightning force that anchor pole is higher, effectively increase anchor pole to the control action at supporting roadway surrounding rock initial stage, promote the effect rank of bolt support, guarantee that the support system general safety is reliable.
(2) the cable bolting technology that strengthens: Large-diameter Steel twisted wire, thin-wall channel beam cooperate little pallet, increase and protect surface area, alleviate that at present used common little pallet contacts with country rock part small size and the point load effect that produces, prevent that the country rock extruding is damaged, will play preferably maintenance effects to loose slabbing fragmented rock body.
(3) key position point post is strengthened: set up wood point post in back fragmentation or sinking larger part, can make large-span tunnel increase the strong point of a centre, play obvious carrier bar cross-cut effect, simultaneously the absciss layer of top board is collapsed to emit and play outer aobvious and early stage forewarning function directly perceived.
(4) the local wall rock grouting reinforcing technique of strengthening: thick for 3212,3213 work plane machine air way roof mudstones, the characteristics that the top sandstone is moisture, control when unfavorable in superficial part surrouding rock deformation, very easily cause absciss layer between sandstone and mud stone, perhaps Sandstone Water is incorporated into mud stone, thereby causes that the Roof Control effect descends, at this moment, for preventing roof accident, should consider to adopt grouting reinforcement technique.
Concrete design of its support:
Normal section is oblique rectangle support with anchor cable network, 36.7m to 112.7m before the L5 point, and this section drift section is: clear span * clear height=4.2 * 3.0m (1-1 section); The 112.7m construction is to cutting eye, drift section before the L5 point: clear span * clear height=4.8 * 3.0m (2-2 section), S pick=15.5m2, S only=14.4m2.Specifically referring to accompanying drawing 2-4.
Concrete steps are:
1), beats square: tap first before the perforating, carefully check top side country rock situation, look for cash alive, crag, confirm to start working after the safety; Then according to center line close inspection drift section specification, do not meet when operating regulation requires and to process first; Want accurately the position of square, and the eye bit error must not surpass ± 100mm, and eye is to 0～15 ° of error; The square degree of depth must be complementary with rock-bolt length, and the plate anchor pole lore of pinching (is beaten with long pricker is continuous after 1～1.2m) with short pricker; Must under the shielding of temporary lining, operate during construction; The order of perforating: by from outside to inside first the order of top rear side carry out successively; Top board carries out perforating by the order of first intermediate and then both sides; Section of side is successively perforating from the top down; Must make a call to a square installs an anchor pole and tightens pallet.
2), the top anchor pole is installed: before the installation, first the ponding in the eyelet, rock dust are swept totally with the pressure wind; During purging, operating personnel must stand in aperture one side, and the eyelet direction forbids that the people is arranged, then linked network, first-class steel band beam, resin anchoring agent pass steel band beam eyelet and net sheet, withstand with anchor pole and deliver to the eyeground, with supporting swivel sleeve anchor nut is connected with roof-bolter, start the rotation of the roof-bolter drive body of rod anchor pole is screwed in resin anchoring agent, Anchor Agent is stirred, until anchor pole reaches projected depth, stir 25～30s, and tightening nuts behind pushing tow 91～180s; Guarantee that pallet is close to the steel band beam, steel band beam and net sheet are close to the coal petrography face; After the 8min, it is fastening with special spanner anchor pole to be carried out secondary, guarantees that the roll bolt torsional forces is not less than 200Nm, pulling capacity is not less than 100KN, what a roofbolt should be beaten and install one, forbid to adopt once accomplish fluently all boltholes after, the again method of property skyhook construction.
3), section of side anchor pole is installed: beat first square topmost, complete net sheet and steel band after, beat with air drill and to annotate the anchor pole in top, other anchor pole of then constructing from top to bottom successively.After namely side connects the net sheet, lay steel band (shoulder nest place's section of side steel band and top steel band are pressed stubble with anchor pole), resin anchoring agent passes steel band beam eyelet and net sheet, withstand with anchor pole and to deliver to the eyeground, with the dedicated convert sleeve anchor nut is connected with section of side roof-bolter or wind coal borer, start the rotation of roof-bolter or the wind coal borer drive body of rod anchor pole is screwed in resin anchoring agent, Anchor Agent is stirred, until anchor pole reaches projected depth, the quick anchoring agent mixing time is that (the Anchor Agent mixing time is 30～40s) to 20～25s at a slow speed, the pushing tow stand-by period is 41～90s (the Anchor Agent pushing tow stand-by period is 180s at a slow speed), after can tightening nuts, make pallet be close to the steel band beam, steel band beam and net sheet are close to the coal petrography face, and after the 8min (at a slow speed behind the Anchor Agent 15min), it is fastening with special spanner anchor pole to be carried out secondary, guarantee that section of side anchor pole torsional forces is not less than 150Nm, pulling capacity is not less than 100KN.
4), beat the anchor cable eye: tap first before the perforating, carefully check top side country rock situation, look for cash alive; Confirm to start working after the safety; Want accurately the position of anchor cable eye, and the eye bit error must not surpass ± 100mm, and eye must not be greater than ± 2 ° to error; Must carry out sign at hammer drill during perforating, strictly press the perforating of steel strand length, the anchor cable eye degree of depth must be complementary with steel strand length, anchor cable hole degree of depth allowable variation-100～0mm, and at the moment (perforating is carried out in 1～1.2m) continued access with short pricker to play anchor cable.
5), anchor cable is installed: before the installation, (rapid resin Anchor Agent for example K2370 resin anchoring agent is placed on the upper end first resin explosive roll to be put into intraocular successively, middling speed resin anchoring agent for example Z2370 resin anchoring agent is placed on the lower end), withstand powder stick with steel strand, powder stick is delivered to the eyeground, with the fixing steel strand and be connected with roof-bolter of conversion sleeve, advance while stirring, until be pushed at the bottom of the hole, mixing time is 25～30s, and behind pushing tow 91～180s roof-bolter is fallen, unload the conversion sleeve on the steel strand, the resin explosive roll anchoring in the anchor cable hole needs maintenance 15 minutes, and then tray, lockset, fastening with anchor cable tensioning machine tool, guarantee that anchor cable prestressing force is not less than 100KN and is not more than 120KN, and guarantee the pallet compression and be close to scar.
Further, φ 22mm is adopted at the top, the strong twisted steel anchor rods such as the vertical muscle of the left-handed nothing of L=2400mm, between array pitch 800mm * 800mm, spread diamond mesh and cooperate the supporting of KTM4 steel band beam, the diamond mesh specification is respectively: length * wide=5000 * 1000mm, length * wide=5600 * 1000mm, and anchor rod pallet board is length * wide * thick=150 * 150 * 10mm butterfly pallet; Section of side adopts φ 20mm, L=2000mm dextrorotation full thread steel equal strength anchor rod, array pitch 800mm * 800mm lays wire lath and for example cooperates that the steel band of KTM4 carries out supporting, steel band beam length 3m, section of side wire lath is long * wide be 3000mm * 1000mm; Along the stubble overlap joint, press stubble 100mm between net and the net, press the stubble place to tighten with bifilar 12# iron wire every 200mm; The footing anchor pole is no more than 500mm apart from base plate; The roll bolt Anchor Agent adopt 1 volume for example model be the middling speed resin anchoring agent of Z2370, right side anchor pole adopts for example slow resin anchoring agent of M2370 of 2 volumes, left side anchor pole adopts for example rapid resin Anchor Agent of K2370 of 1 volume.
Further, anchor cable adopts the steel strand of φ 17.8mm to process, design length 6500～9500mm detects the hole lithology according to top board and selects (every construction 50m detects the hole in dark top board lithology of 10m of the center in tunnel construction), guarantees that the length that anchor cable is taken root in hard rock is not less than 1m; Cooperate special-purpose anchor cable pallet (250 * 250mm, the thick band sphere of 14mm pallet) to carry out supporting, per 2 anchor cables take a step to connect with the long steel band trend of 2m, and the both sides anchor cable lags behind and must not meet head on greater than 5m, and middle row's anchor cable lags behind and must not meet head on greater than 50m; Anchor cable adopts 2 volume resin anchoring agent anchorings, and its middle and upper part Anchor Agent model is the rapid resin Anchor Agent of for example K2370, and bottom Anchor Agent for example model is the middling speed resin anchoring agent of Z2370.
When back fragmentation, mistake tomography and support with anchor cable network can not satisfy the safety support requirement, adopt and set up the trapezoidal canopy supporting of TU shaped steel, the trapezoidal canopy specification of frame TU shaped steel: clear span * clear height=4.8 * 3.0m, S pick=16.6m2.
Further, supporting adopts the dead zone to stay the lane surrounding rock supporting, before beating square, once staying on the full section in lane, sets up the Telescopic U-shaped steel canopy along the roadway direction interval; Finish after U-shaped steel frame establishes, to Liu Xiang tunnel inwall sprayed mortar once, form concrete supporting, thickness is 200mm, and then beats square and carry out bolt support.Gob side entry retaining refers to safeguard the tunnel at the rear of work plane along gob edge, it is a kind of comparatively advanced coal-mining method, comparatively ripe for the supporting method that once stays the lane both at home and abroad, once stay the lane to require the basal area in tunnel little, when once staying the lane, according to the strata movement situation, the tunnel is in the depressor area on limit, goaf, the mine pressure that this moment, the tunnel was subject to is less, the distortion that the tunnel produces is less, generally on its design of its support, mostly be greatly the methods such as anchor (rope) net or frame canopy, when once staying the lane to refer in back production bank face the transporter lane kept as next stage work plane air way; The next stage during working face extraction because ventilating or need of production becomes secondary when again this tunnel being kept and stays the lane.By supporting of the present invention, go for the soft tunnel of geology.
Further, adopt φ 15.24mm small-bore prestress anchorage cable that it is encrypted supporting between the strong twisted steel anchor rods such as the vertical muscle of described left-handed nothing, anchor pole and anchor cable spacing are no more than 0.65m, and the prestressing force of described encryption prestress anchorage cable is 100-120KN.
Concrete TU canopy support process step is (seeing accompanying drawing 4):
A kind of TU canopy support process, it comprises the steps:
1), enter the job location before, should check first job site support quality, find underproof support, must process first rear construction; Arrangement, safeguard support should be from outside to inside, undertaken by canopy.
2), put the beams in place: at first according in, stringcourse close inspection drift section specification, the in time rectification of pinpointing the problems; To tap first before putting the beams in place, carefully check top side country rock situation, look for cash alive, crag, confirm to start working after the safety; During upper beam, first one on beam is placed on the forestope, then drags on firmly and help movement with beam is past, the beam other end is placed on the forestope, the first-class rear check and correction center line of Liang Zi moves to the position of requirement according to middle bundle of lines beam; The level of good beam of expenditure dipstick metering is measured the canopy distance, fixing capplce two ends, and the upper top pull bar is aimed at the pull bar silk with draw-bar eye and is penetrated from bottom to top, and the nut of screwing on is tightened with torque spanner, and moment of torsion is not less than 100Nm, and pull bar is consistent with the center line in roadway direction.
3), cross the top: tap first, guaranteeing in the safe situation, lay wire lath, basketry sheet pool material rod etc. at the capplce that newly sets up again and connect topping material and in time the top is connect reality; Fall heights of roofs and can connect real top board with pool material bundle or slab filling less than 0.5m; Fall heights of roofs more than or equal to 0.5m, must check first gas, when gas density is lower than 0.8%, use half round timber (L=2.0m, D=0.2m) to connect real top board with " well " font grillage.
4), dig hamstring: under the good top board shielding of effective support, look for clean side top cash alive, crag, measure the hamstring position, TU type canopy leg hamstring buried depth 300mm, hamstring must dig the real end, if the super dark or base plate of hamstring during for floating cash, coal or soft rock, must be worn sabot (sabot specification 300mm * 300mm * 100mm), forbid the canopy leg is propped up on floating cash.
5), plant hired thug: manually the canopy leg is planted into hamstring, the special messenger holds up leg, the canopy leg is engaged with capplce tightly, check to adjust meeting of hired thug and move back mountain, swing, Zha Jiao and lap length, begin upper card cable after reaching requirement, the good distance of amount fixes a card cable silk first, after card cable eye aligning screw mandrel penetrates, go up first flat shim, again upper spring pad, then tightening nuts (moment of torsion is not less than 150Nm).
6), waist side: the waist side carries out from bottom to top, carries on the back first metal mesh sheet, and pool material is evenly arranged flowers to be arranged between two canopies, and pool material carries out section of filling side with spoil after putting steadily.
7), the inclined gallery support should have suitable prop setting angle, to keep the tunnel firm, generally speaking, prop setting angle is the 1/6-1/8 of roadway gradient, is forbidden to move back the mountain.
Further, TU canopy complexed metal net sheet, pool material (top diameter 〉=30mm), the supporting of basketry sheet, pool material, basketry sheet, wire lath waist were helped the top, the pool material flower back of the body, add diamond mesh sheet, basketry sheet between pool material and crag, diamond mesh sheet specification: the net width of cloth is length * wide=5600 * 1000mm.TU canopy specification is: B (waist bundle) * H (capplce is to base plate)=4800 * 3000mm, and beam length 4786mm, the long 3352mm of leg, 5175mm is pricked at the end.
Further, under the shielding of metal forestope in time on capplce, plant canopy leg and waist side back of the body top; And require to lay wire lath between TU canopy support and the crag, adopt the pool material flower back of the body between wire lath and the support, spacing 400mm (in-in), wire lath is laid along the rack wheel profile, the net sheet is pressed stubble 100mm, presses the stubble place firm with the colligation of 12# iron wire every 200mm, TU type canopy lap length 500mm, card cable center is apart from overlap edge along 125mm, limited block apart from overlap edge along 100mm; Requirement card cable is regular energetically, member is complete; U-shaped clamp is opened a 100mm, and every width of cloth card cable must be assorted two nuts, two flat shims, two spring shims, and the card cable must be tightened with machinery or torque spanner, and moment of torsion is not less than 150Nm, and pull bar quantity is complete, and embarks on journey and reach the standard grade, and is fastening strong; TU canopy set spacing is 800mm, during large or zone of fracture, dwindles the canopy distance when roof pressure.
Claims (5)
1. support with anchor cable network technique, it may further comprise the steps:
1), beats square: tap first before the perforating, carefully check top side country rock situation, look for cash alive, crag, confirm to start working after the safety; Then according to center line close inspection drift section specification, do not meet when operating regulation requires and to process first; Want accurately the position of square, and the eye bit error must not surpass ± 100mm, and eye is to 0～15 ° of error; The square degree of depth must be complementary with rock-bolt length, and the plate anchor pole lore of pinching (is beaten with long pricker is continuous after 1～1.2m) with short pricker; Must under the shielding of temporary lining, operate during construction; The order of perforating: by from outside to inside first the order of top rear side carry out successively; Top board carries out perforating by the order of first intermediate and then both sides; Section of side is successively perforating from the top down; Must make a call to a square installs an anchor pole and tightens pallet.
2), the top anchor pole is installed: before the installation, first the ponding in the eyelet, rock dust are swept totally with the pressure wind; During purging, operating personnel must stand in aperture one side, and the eyelet direction forbids that the people is arranged, then linked network, first-class steel band beam, resin anchoring agent pass steel band beam eyelet and net sheet, withstand with anchor pole and deliver to the eyeground, with supporting swivel sleeve anchor nut is connected with roof-bolter, start the rotation of the roof-bolter drive body of rod anchor pole is screwed in resin anchoring agent, Anchor Agent is stirred, until anchor pole reaches projected depth, stir 25～30s, and tightening nuts behind pushing tow 91～180s; Guarantee that pallet is close to the steel band beam, steel band beam and net sheet are close to the coal petrography face; After the 8min, it is fastening with special spanner anchor pole to be carried out secondary, guarantees that the roll bolt torsional forces is not less than 200Nm, pulling capacity is not less than 100KN, what a roofbolt should be beaten and install one, forbid to adopt once accomplish fluently all boltholes after, the again method of property skyhook construction.
3), section of side anchor pole is installed: beat first square topmost, complete net sheet and steel band after, beat with air drill and to annotate the anchor pole in top, other anchor pole of then constructing from top to bottom successively.After namely side connects the net sheet, lay steel band (shoulder nest place's section of side steel band and top steel band are pressed stubble with anchor pole), resin anchoring agent passes steel band beam eyelet and net sheet, withstand with anchor pole and to deliver to the eyeground, with the dedicated convert sleeve anchor nut is connected with section of side roof-bolter or wind coal borer, start the rotation of roof-bolter or the wind coal borer drive body of rod anchor pole is screwed in resin anchoring agent, Anchor Agent is stirred, until anchor pole reaches projected depth, the quick anchoring agent mixing time is that (the Anchor Agent mixing time is 30～40s) to 20～25s at a slow speed, the pushing tow stand-by period is 41～90s (the Anchor Agent pushing tow stand-by period is 180s at a slow speed), after can tightening nuts, make pallet be close to the steel band beam, steel band beam and net sheet are close to the coal petrography face, and after the 8min (at a slow speed behind the Anchor Agent 15min), it is fastening with special spanner anchor pole to be carried out secondary, guarantee that section of side anchor pole torsional forces is not less than 150Nm, pulling capacity is not less than 100KN.
4), beat the anchor cable eye: tap first before the perforating, carefully check top side country rock situation, look for cash alive; Confirm to start working after the safety; Want accurately the position of anchor cable eye, and the eye bit error must not surpass ± 100mm, and eye must not be greater than ± 2 ° to error; Must carry out sign at hammer drill during perforating, strictly press the perforating of steel strand length, the anchor cable eye degree of depth must be complementary with steel strand length, anchor cable hole degree of depth allowable variation-100～0mm, and at the moment (perforating is carried out in 1～1.2m) continued access with short pricker to play anchor cable.
5), anchor cable is installed: before the installation, (rapid resin Anchor Agent for example K2370 resin anchoring agent is placed on the upper end first resin explosive roll to be put into intraocular successively, middling speed resin anchoring agent for example Z2370 resin anchoring agent is placed on the lower end), withstand powder stick with steel strand, powder stick is delivered to the eyeground, with the fixing steel strand and be connected with roof-bolter of conversion sleeve, advance while stirring, until be pushed at the bottom of the hole, mixing time is 25～30s, and behind pushing tow 91～180s roof-bolter is fallen, unload the conversion sleeve on the steel strand, the resin explosive roll anchoring in the anchor cable hole needs maintenance 15 minutes, and then tray, lockset, fastening with anchor cable tensioning machine tool, guarantee that anchor cable prestressing force is not less than 100KN and is not more than 120KN, and guarantee the pallet compression and be close to scar.
2. support process as claimed in claim 1, it is characterized in that: φ 22mm is adopted at the top, the strong twisted steel anchor rods such as the vertical muscle of the left-handed nothing of L=2400mm, between array pitch 800mm * 800mm, spread diamond mesh and cooperate the supporting of KTM4 steel band beam, the diamond mesh specification is respectively: length * wide=5000 * 1000mm, length * wide=5600 * 1000mm, and anchor rod pallet board is length * wide * thick=150 * 150 * 10mm butterfly pallet; Section of side adopts φ 20mm, L=2000mm dextrorotation full thread steel equal strength anchor rod, array pitch 800mm * 800mm lays wire lath and for example cooperates that the steel band of KTM4 carries out supporting, steel band beam length 3m, section of side wire lath is long * wide be 3000mm * 1000mm; Along the stubble overlap joint, press stubble 100mm between net and the net, press the stubble place to tighten with bifilar 12# iron wire every 200mm; The footing anchor pole is no more than 500mm apart from base plate; The roll bolt Anchor Agent adopt 1 volume for example model be the middling speed resin anchoring agent of Z2370, right side anchor pole adopts for example slow resin anchoring agent of M2370 of 2 volumes, left side anchor pole adopts for example rapid resin Anchor Agent of K2370 of 1 volume.
3. support process as claimed in claim 2, it is characterized in that: anchor cable adopts the steel strand of φ 17.8mm to process, design length 6500～9500mm, detect the hole lithology according to top board and select (every construction 50m detects the hole in dark top board lithology of 10m of the center in tunnel construction), guarantee that the length that anchor cable is taken root in hard rock is not less than 1m; Cooperate special-purpose anchor cable pallet (250 * 250mm, the thick band sphere of 14mm pallet) to carry out supporting, per 2 anchor cables take a step to connect with the long steel band trend of 2m, and the both sides anchor cable lags behind and must not meet head on greater than 5m, and middle row's anchor cable lags behind and must not meet head on greater than 50m; Anchor cable adopts 2 volume resin anchoring agent anchorings, and its middle and upper part Anchor Agent model is the rapid resin Anchor Agent of for example K2370, and bottom Anchor Agent for example model is the middling speed resin anchoring agent of Z2370.
4. support process as claimed in claim 1 is characterized in that: supporting adopts the dead zone to stay the lane surrounding rock supporting, before beating square, once staying on the full section in lane, sets up the Telescopic U-shaped steel canopy along the roadway direction interval; Finish after U-shaped steel frame establishes, to Liu Xiang tunnel inwall sprayed mortar once, form concrete supporting, thickness is 200mm, and then beats square and carry out bolt support.
5. support process as claimed in claim 4, it is characterized in that: between the strong twisted steel anchor rods such as the vertical muscle of described left-handed nothing, adopt φ 15.24mm small-bore prestress anchorage cable that it is encrypted supporting, anchor pole and anchor cable spacing are no more than 0.65m, and the prestressing force of described encryption prestress anchorage cable is 100-120KN.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233748A (en) * | 2013-05-09 | 2013-08-07 | 安徽理工大学 | Anchor mesh cable column combined supporting design method for expanding extra-large span open-off cut brush into lane |
| CN104453957A (en) * | 2014-11-15 | 2015-03-25 | 大同煤矿集团有限责任公司 | Surrounding rock control method for medium-thickness coal seam roof |
| CN104533483A (en) * | 2014-12-24 | 2015-04-22 | 中国矿业大学(北京) | Roadway total-space prestress truss, anchor cable and anchor rod coordinated supporting method |
| CN104832198A (en) * | 2015-03-13 | 2015-08-12 | 中煤科工集团重庆研究院有限公司 | Comprehensive treatment method for roadway surrounding rock deformation, impact mine pressure and coal and gas outburst |
| CN105569675A (en) * | 2016-03-16 | 2016-05-11 | 重庆工程职业技术学院 | Roadway support method and structure for steeply pitching seam |
| CN105927232A (en) * | 2016-05-19 | 2016-09-07 | 安徽理工大学 | Deep-blocking and shallow-grouting grouting method for no-blank area of mine and grouting safety protecting device |
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| CN106761867A (en) * | 2016-12-23 | 2017-05-31 | 四川广旺能源发展（集团）有限责任公司 | High-dipping surrounding rock of actual mining roadway stabilization supporting facility and support process |
| CN108005696A (en) * | 2017-12-14 | 2018-05-08 | 大同煤矿集团有限责任公司 | Anchor net beam truss support method in high stress tunnel |
| CN109505637A (en) * | 2018-09-25 | 2019-03-22 | 平安煤炭开采工程技术研究院有限责任公司 | Support with anchor cable network attachment substitute preparation method and support with anchor cable network method |
| CN114876536A (en) * | 2022-06-22 | 2022-08-09 | 淮南矿业(集团)有限责任公司 | Anchor high-pretightening-force anchor rod and anchor cable combined supporting device and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892851A (en) * | 2010-06-29 | 2010-11-24 | 武汉科技大学 | Metal mine anchor rod support method |
| CN101915112A (en) * | 2010-08-02 | 2010-12-15 | 中国矿业大学(北京) | Strong-side and strong-corner coal entry anchor rod support method |
| CN202170802U (en) * | 2011-08-17 | 2012-03-21 | 安徽恒源煤电股份有限公司祁东煤矿 | Slip-casting anchor cable |
-
2012
- 2012-12-11 CN CN201210528000.XA patent/CN102979542B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892851A (en) * | 2010-06-29 | 2010-11-24 | 武汉科技大学 | Metal mine anchor rod support method |
| CN101915112A (en) * | 2010-08-02 | 2010-12-15 | 中国矿业大学(北京) | Strong-side and strong-corner coal entry anchor rod support method |
| CN202170802U (en) * | 2011-08-17 | 2012-03-21 | 安徽恒源煤电股份有限公司祁东煤矿 | Slip-casting anchor cable |
Non-Patent Citations (1)
| Title |
|---|
| 谢承察等: "锚梁网加锚索联合支护在宣东矿业公司煤巷中的应用", 《安全高效煤矿地质保障技术及应用——中国地质学会、中国煤炭学会煤田地质专业委员会、中国煤炭工业劳动保护科学技术学会水害防治专业委员会学术年会文集》, 31 December 2007 (2007-12-31) * |
Cited By (13)
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| CN103233748A (en) * | 2013-05-09 | 2013-08-07 | 安徽理工大学 | Anchor mesh cable column combined supporting design method for expanding extra-large span open-off cut brush into lane |
| CN104453957A (en) * | 2014-11-15 | 2015-03-25 | 大同煤矿集团有限责任公司 | Surrounding rock control method for medium-thickness coal seam roof |
| CN104533483A (en) * | 2014-12-24 | 2015-04-22 | 中国矿业大学(北京) | Roadway total-space prestress truss, anchor cable and anchor rod coordinated supporting method |
| CN104832198A (en) * | 2015-03-13 | 2015-08-12 | 中煤科工集团重庆研究院有限公司 | Comprehensive treatment method for roadway surrounding rock deformation, impact mine pressure and coal and gas outburst |
| CN105569675A (en) * | 2016-03-16 | 2016-05-11 | 重庆工程职业技术学院 | Roadway support method and structure for steeply pitching seam |
| CN105927232A (en) * | 2016-05-19 | 2016-09-07 | 安徽理工大学 | Deep-blocking and shallow-grouting grouting method for no-blank area of mine and grouting safety protecting device |
| CN106089238A (en) * | 2016-08-19 | 2016-11-09 | 淮南矿业(集团)有限责任公司 | A kind of high seam driuing along goaf support system |
| CN106761867A (en) * | 2016-12-23 | 2017-05-31 | 四川广旺能源发展（集团）有限责任公司 | High-dipping surrounding rock of actual mining roadway stabilization supporting facility and support process |
| CN108005696A (en) * | 2017-12-14 | 2018-05-08 | 大同煤矿集团有限责任公司 | Anchor net beam truss support method in high stress tunnel |
| CN108005696B (en) * | 2017-12-14 | 2019-09-20 | 大同煤矿集团有限责任公司 | Anchor net beam truss support method in high stress tunnel |
| CN109505637A (en) * | 2018-09-25 | 2019-03-22 | 平安煤炭开采工程技术研究院有限责任公司 | Support with anchor cable network attachment substitute preparation method and support with anchor cable network method |
| CN114876536A (en) * | 2022-06-22 | 2022-08-09 | 淮南矿业(集团)有限责任公司 | Anchor high-pretightening-force anchor rod and anchor cable combined supporting device and method |
| CN114876536B (en) * | 2022-06-22 | 2023-08-29 | 淮南矿业(集团)有限责任公司 | Anchor high-pretightening-force anchor rod and anchor rope combined supporting device and method |
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