CN103557020B - Energy-absorption and impact-prevention supporting and protecting device for combined type circular tunnel - Google Patents
Energy-absorption and impact-prevention supporting and protecting device for combined type circular tunnel Download PDFInfo
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- CN103557020B CN103557020B CN201310555082.1A CN201310555082A CN103557020B CN 103557020 B CN103557020 B CN 103557020B CN 201310555082 A CN201310555082 A CN 201310555082A CN 103557020 B CN103557020 B CN 103557020B
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Abstract
The invention discloses an energy-absorption and impact-prevention supporting and protecting device for a combined type circular tunnel, belongs to the field of coal mine tunnel supporting technologies and is mainly applied to an energy-absorption and impact-prevention supporting and protecting device for impact ground pressure of a deep coal mine. According to the energy-absorption and impact-prevention supporting and protecting device, energy-absorption anchor rods are coupled with surrounding rocks of the tunnel to form a whole, so that the supporting and protecting strength of the surrounding rocks of the tunnel is improved, and the problem of overlarge pressure caused by rheology of the surrounding rocks of the tunnel is solved. The energy-absorption and impact-prevention supporting and protecting device comprises arc frames, wherein the adjacent arc frames are connected with each other through an energy-absorption connection rod; the arc frames consist of outer ring plates, energy-absorption cushion blocks and inner ring plates; two ends of the inner ring plates and two ends of the outer ring plates are connected through clamps; the energy-absorption cushion blocks consist of energy-absorption outer barrels and energy-absorption plates; the energy-absorption connection rods comprise hydraulic cylinders; left hinge lifting ring heads are fixed at the bottom ends of the hydraulic cylinders; pistons are arranged in the hydraulic cylinders; liquid injection holes are formed in the side walls of the hydraulic cylinders; cylinder covers are fixed at the right ends of the hydraulic cylinders; the left ends of supporting columns are connected with the pistons; the right ends of the supporting columns are arranged in the left ends of energy-absorption barrels; right hinge lifting ring heads are fixed at the bottom ends of the energy-absorption barrels.
Description
Technical field
The invention belongs to colliery tunnel support technical field, particularly relate to a kind of combined type circular tunnel energy-absorbing erosion control suspension device, be mainly used in the energy-absorbing erosion control suspension device of deep coalmine bump.
Background technology
Along with the increase of China's demand for energy and the exhaustion of superficial part coal resources, colliery cutting depth is deepened increasingly, and east China part mine has entered into the deep mining stage, and the dark mine of thousands of rice is of common occurrence.Deep Mine buried depth is large, the stress of primary rock is large, and roadway surrounding rock is out of shape greatly under high-ground stress, uses the raising of the mining rate of modernization mining equipment in addition, the frequency that Deep Mine bump occurs and intensity increase, and require that roadway support device has energy-absorbing flush-prevention function.
The suspension device that existing shaped steel is formed is fairly simple, supporting capacity is larger, especially it is fast that closed U-shaped steel suspension device has increasing resistance speed, the advantages such as supporting intensity height and contractibility, be widely used in the soft-rock tunnel that deflection is larger, and affect larger stope of coal mines tunnel by dynamic pressure, which overcome the not contractile shortcoming of rigid support, when the pressure of shoulder bed effects on closed U-shaped steel suspension device reaches certain value, slip contracting is there is and moves in the support body of closed U-shaped steel suspension device in junction, the result that contracting of sliding is moved makes the pressure drop of shoulder bed effects on support body, thus avoid pressure from surrounding rock be greater than the bearing capacity of support body and cause the destruction of support body.But current closed U-shaped steel suspension device belongs to passive protecting, country rock residual strength cannot be improved, the expansion in uncontrollable rock crusher district, and the not coupling to contact with country rock, cause the support body unbalance stress of closed U-shaped steel suspension device, there is concentrated load and eccentric load in local, causes the interaction of support body and country rock poor, make support body integrated carrying ability lower, even cause support body deformation failure.
For the tunnel that the dynamic phenomenons such as bump are more, impact a large amount of impact energy of release, act directly on suspension device, strong impact failure is produced to it, this just requires that suspension device not only can bear powerful country rock static load, it is more wanted to press the strong dynamic load of the high speed of generation with withstanding shocks, and existing closed U-shaped steel suspension device impact strength is lower, after the support body slippage contraction of closed U-shaped steel suspension device, card is pulled pretightning force and is increased, and the type of attachment that overlap joint pulled by card cannot accomplish rapid desufflation release, therefore cannot step down fast, the energy discharged in timely absorption bump process, effectively cannot resist the high-strength dynamic load that bump produces.
Summary of the invention
For prior art Problems existing, the invention provides a kind of combined type circular tunnel energy-absorbing erosion control suspension device, this suspension device is coupled into one by energy-absorption anchor rod and roadway surrounding rock, improve the supporting intensity to roadway surrounding rock, impact energy when utilizing the absorption of energy-absorbing cushion block to impact, utilize energy-absorbing connecting rod to shrink release and solve the excessive problem of pressure that roadway surrounding rock stream alters, make suspension device have automatic regulating function by the hydraulic system be connected in series of hinged energy-absorbing connecting rod and energy-absorbing connecting rod, prevent local pressure excessive.
To achieve these goals, the present invention adopts following technical scheme: a kind of combined type circular tunnel energy-absorbing erosion control suspension device, comprise some sections of arc frames, distance is left between adjacent arc frame, form inc circular support body, be connected by energy-absorbing connecting rod between adjacent arc frame, form closed support body, arc frame is by outer girth sheets, several energy-absorbing cushion blocks and interior girth sheets composition, outer girth sheets, energy-absorbing cushion block and interior girth sheets are arc, the diameter of outer girth sheets is greater than the diameter of interior girth sheets, and be arranged on the outside of interior girth sheets, energy-absorbing cushion block is arranged between outer girth sheets and interior girth sheets, in every section, girth sheets is all pulled by card with the two ends of outer girth sheets and is connected, and inside interior girth sheets, card fastens and be provided with card and pull hinged-support, outside girth sheets is provided with energy-absorption anchor rod, described energy-absorbing cushion block is made up of energy-absorbing urceolus and several energy-absorbing plates be arranged in energy-absorbing urceolus, the sidewall of the energy-absorbing urceolus adjacent with inside and outside girth sheets is provided with guide rail, guide rail matches with inside and outside girth sheets respectively, inside and outside girth sheets can along the slide of energy-absorbing urceolus, energy-absorbing plate is the plate that surface has hollow boss, and the diametric(al) of energy-absorbing plate circular support body along place is successively set on the inside of energy-absorbing urceolus, described energy-absorbing connecting rod comprises hydraulic cylinder, the bottom of hydraulic cylinder is fixed with left hinged suspension ring head, piston is provided with in hydraulic cylinder, hydraulic cylinder sidewall on the left of piston is provided with liquid injection hole, fixedly there is at the right-hand member of hydraulic cylinder the cylinder cap of through hole, the internal diameter of cylinder cap is less than the external diameter of piston, the left end of pillar is connected with piston by the through hole of cylinder cap, the right-hand member of pillar is arranged on energy-absorbing cylinder left end inside, energy-absorbing cylinder left end sidewall is provided with groove, the energy-absorbing drum outer wall with groove is provided with several turn-buckles, the bottom of energy-absorbing cylinder is fixed with right hinged suspension ring head.
Described card is pulled and is fastened plate by card, fastening bolt, card are pulled lower plate and formed, card is fastened plate and is matched with outer girth sheets, card is pulled lower plate and is matched with interior girth sheets, card is fastened plate and is pulled lower plate with card and be fixedly connected with by fastening bolt, described card is pulled hinged-support and is fixed on card and pulls in lower plate, and the left and right hinged suspension ring head of described energy-absorbing connecting rod and the adjacent card of adjacent arc frame are pulled hinged-support and be hinged.
The cross section of described inside and outside girth sheets is circular, square or U-shaped.
The distance left between described adjacent arc frame is identical.
Described energy-absorbing plate is the plate that a side surface has hollow boss.
Described adjacent energy-absorbing plate is arranged on the inside of energy-absorbing urceolus according to protruding relative with projection or that plate is relative with plate mode.
The hollow boss of described energy-absorbing plate is truncated cone-shaped.
Described pillar is connected with screw thread with between piston.
Described hydraulic cylinder is connected with screw thread with between cylinder cap.
The port of described turn-buckle is connected by turn-buckle screw rod, turn-buckle nut.
Beneficial effect of the present invention:
The application of suspension device of the present invention with promote the technical level that can significantly improve China's coal-mine safety and take precautions against natural calamities, anti-disaster ability, the generation of the major accident that effective control dynamic disaster causes, reduce casualties, improve colliery digging speed and labor productivity, reduce prevention and cure project expense, have good social benefit, concrete advantage is as follows:
1, suspension device of the present invention is coupled into one by energy-absorption anchor rod and roadway surrounding rock, improves the supporting intensity to roadway surrounding rock, suspension device is become active support by passive protecting, realize prestressing force supporting, strengthens roadway surrounding rock residual strength; Pull hinged formation by energy-absorbing connecting rod and card and close support body, achieve suspension device with the self-adjusting function of deformation of the surrounding rock in tunnel, integrate erosion control energy-absorbing, erosion control energy absorption ability is strong, and structure is simple, easy for installation;
2, the hydraulic system of energy-absorbing connecting rod of the present invention is for being connected in series, the local failure that the stress raisers preventing the unbalance stress because of different energy-absorbing connecting rod to cause cause, and improves the integer support performance of suspension device;
3, the hydraulic cylinder safety valve of energy-absorbing connecting rod of the present invention can arrange different safe threshold from turn-buckle, realize quiet, dynamic separation composite endergonic, when roadway surrounding rock is slowly out of shape, to be stepped down release by piston, when impacting generation, hydraulic system has little time release of stepping down, then utilize the quick erosion control energy-absorbing of energy-absorbing cylinder;
4, when inside and outside girth sheets of the present invention adopts the U-shaped steel of inside and outside circle, energy-absorbing cushion block constrains the wing plate of the U-shaped steel in outer ring and the U-shaped steel of inner ring to open outward, add the supporting intensity of suspension device, energy-absorbing cushion block plays energy-absorbing buffering effect simultaneously, the last supporting in protection tunnel ensures that the U-shaped steel of inner ring is from impact failure, ensure that the personal safety of constructor;
5, because the present invention has folding integral structure: energy-absorbing connecting rod and card are pulled and be hinged, energy-absorbing connecting rod can shrink in discharge opeing, can extract hinging pin shaft easily and efficiently, is convenient to dismounting, installs and carrying.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of combined type circular tunnel energy-absorbing erosion control suspension device of the present invention;
Fig. 2 is the structural representation of energy-absorbing connecting rod of the present invention;
Fig. 3 is the A-A sectional view of Fig. 1;
Fig. 4 is the structural representation of energy-absorbing plate of the present invention;
Fig. 5 is the B-B sectional view of Fig. 2;
Fig. 6 is the structural representation of energy-absorbing cylinder of the present invention;
Fig. 7 is the C-C sectional view of Fig. 6;
In figure, 1-energy-absorption anchor rod (anchor cable), the U-shaped steel in 2-outer ring, 3-energy-absorbing cushion block, 31-energy-absorbing urceolus, 32-energy-absorbing plate, 33-guide rail, 4-card is pulled, plate fastened by 41-card, 42-fastening bolt, lower plate pulled by 43-card, hinged-support pulled by 44-card, 5-energy-absorbing connecting rod, 51-left hinged suspension ring head, 52-liquid injection hole, 53-hydraulic cylinder, 54-piston, 55-cylinder cap, 56-pillar, 57-turn-buckle, 571-turn-buckle screw rod, 572-turn-buckle nut, 58-energy-absorbing cylinder, 59-right hinged suspension ring head, the U-shaped steel of 6-inner ring, 7--arc frame, 8--closes support body.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in Fig. 1 ~ Fig. 5, a kind of combined type circular tunnel energy-absorbing erosion control suspension device, be included in four sections of arc frames 7 in same perpendicular, distance is left between adjacent arc frame 7, form inc circular support body, be connected by energy-absorbing connecting rod 5 between adjacent arc frame 7, form closed support body 8, arc frame 7 is by the U-shaped steel 2 in outer ring, three energy-absorbing cushion blocks 3 and the U-shaped steel 6 of inner ring form, the U-shaped steel 2 in outer ring, and energy-absorbing cushion block 3 and the U-shaped steel 6 of inner ring are concentric arcs, the diameter of the U-shaped steel in outer ring 2 is greater than the diameter of the U-shaped steel 6 of inner ring, and is arranged on the outside of the U-shaped steel 6 of inner ring; The length of the U-shaped steel in outer ring 2 is greater than the length of the U-shaped steel 6 of inner ring, and the two ends in the U-shaped steel 6 of inner ring are extended at the two ends of the U-shaped steel in outer ring 2, and energy-absorbing cushion block 3 is evenly distributed between the U-shaped steel in outer ring 2 and the U-shaped steel 6 of inner ring; The two ends of every section of U-shaped steel of inner ring 6 are all pulled 4 by high-strength card and are connected with the U-shaped steel 2 in outer ring, and inside the U-shaped steel of inner ring 6, high-strength card pulls and be provided with card on 4 and pull hinged-support 44; The two ends of the U-shaped steel 2 in outer ring that not U-shaped with inner ring steel 6 contacts are provided with energy-absorption anchor rod (anchor cable) 1, for being coupled into one with roadway surrounding rock; Described energy-absorbing cushion block 3 is made up of energy-absorbing urceolus 31 and several energy-absorbing plates 32 be arranged in energy-absorbing urceolus 31, the sidewall of the energy-absorbing urceolus 31 adjacent with the U-shaped steel of inside and outside circle is provided with guide rail 33, guide rail 33 matches with the U-shaped steel of inside and outside circle respectively, and the U-shaped steel of inside and outside circle can slide along the guide rail 33 of energy-absorbing urceolus 31, the guide rail 33 of energy-absorbing urceolus 31 can retrain the wing plate of the U-shaped steel of inside and outside circle, when preventing the U-shaped steel of inside and outside circle from bending, inside and outside circle U-shaped steel wing plate generation bending deformation, strengthens the flexural strength of the U-shaped steel of inside and outside circle; Slip along the circumferential direction all can be produced between energy-absorbing cushion block 3 and the U-shaped steel of inside and outside circle, when preventing the U-shaped steel 2 in roadway surrounding rock extruding outer ring from deforming, energy-absorbing cushion block 3 pairs of U-shaped steel in outer ring 2 produce extra Moment, thus improve the anti-pressure ability of suspension device; Energy-absorbing plate 32 is the steel plate that a side surface has hollow boss, and hollow boss is evenly distributed on steel plate, and the diametric(al) of energy-absorbing plate 32 circular support body along place is sequentially laminated on the inside of energy-absorbing urceolus 31; When roadway surrounding rock Rheological Deformation, energy-absorbing cushion block 3, the U-shaped steel in outer ring 2 and the U-shaped steel 6 of inner ring can increase the flexural strength of suspension device, when impacting generation, roadway surrounding rock snap action is U-shaped steel 2 in outer ring, can make the U-shaped steel in outer ring 2 that strong damaged deformation occurs, the U-shaped steel 2 in outer ring acts on energy-absorbing cushion block 3, the hollow boss of the energy-absorbing plate 32 of energy-absorbing cushion block 3 is under quick high-strength load effect, to be extruded and elastic-plastic deformation and destruction will occur, absorb impact energy, play cushioning effect, the load of reducing effect on the U-shaped steel 6 of inner ring, prevent the U-shaped steel 6 of inner ring from destroying;
Described energy-absorbing connecting rod 5 comprises hydraulic cylinder 53, the bottom of hydraulic cylinder 53 is fixed with left hinged suspension ring head 51, piston 54 is provided with in hydraulic cylinder 53, hydraulic cylinder 53 sidewall on the left of piston 54 is provided with liquid injection hole 52, by liquid injection hole 52 serial communication of four energy-absorbing connecting rods 5 during use, and be connected with triple-use valve, realize the function of fluid injection and overload overflow; Fixedly there is at the right-hand member of hydraulic cylinder 53 cylinder cap 55 of through hole, the internal diameter of cylinder cap 55 is less than the external diameter of piston 54, depart from from hydraulic cylinder 53 for preventing piston 54, the left end of pillar 56 is connected with piston 54 by the through hole of cylinder cap 55, the right-hand member of pillar 56 is arranged on energy-absorbing cylinder 58 left end inside, energy-absorbing cylinder 58 left end sidewall is provided with groove vertically, energy-absorbing cylinder 58 outer wall with groove is provided with several turn-buckles 57, regulates the force of sliding friction between energy-absorbing cylinder 58 and pillar 56 by the pretightning force adjusting turn-buckle 57; The bottom of energy-absorbing cylinder 58 is fixed with right hinged suspension ring head 59.
Described high-strength card is pulled and 4 is fastened plate 41 by card, fastening bolt 42, card are pulled lower plate 43 and formed, card is fastened plate 41 and is matched with the U-shaped steel 2 in outer ring, card is pulled lower plate 43 and is matched with the U-shaped steel 6 of inner ring, card is fastened plate 41 and is pulled lower plate 43 with card and be fixedly connected with by fastening bolt 42, described card is pulled hinged-support 44 and is fixed on card and pulls in lower plate 43, the left and right hinged suspension ring head of described energy-absorbing connecting rod 5 and the adjacent card of adjacent arc frame 7 are pulled hinged-support 44 and are hinged, and produce additional bending moment when arc frame 7 can be avoided to shrink between arc frame 7.
The distance left between described adjacent arc frame 7 is identical.
Described adjacent energy-absorbing plate 32 is sequentially laminated on the inside of energy-absorbing urceolus 31 according to protruding relative with projection or that plate is relative with plate mode.
The hollow boss of described energy-absorbing plate 32 is truncated cone-shaped.
Described pillar 56 is connected with screw thread with between piston 54.
Described hydraulic cylinder 53 is connected with screw thread with between cylinder cap 55.
The port of described turn-buckle 57 is connected by turn-buckle screw rod 571, turn-buckle nut 572.
Below in conjunction with accompanying drawing, a use procedure of the present invention is described:
As shown in Fig. 1 ~ Fig. 7, first energy-absorbing cushion block 3 is placed between the U-shaped steel of inside and outside circle, and pull 4 connections by high-strength card, form one section of arc frame 7, four sections of arc frames 7 are made altogether with same method, again adjacent card on adjacent arc frame 7 is pulled hinged-support 44 to be hinged with the two ends of same energy-absorbing connecting rod 5, eventually through four energy-absorbing connecting rods 5, four sections of arc frames 7 are connected, form a closed support body 8; The hydraulic cylinder safety valve of setting energy-absorbing connecting rod 5 and the safe threshold of turn-buckle 57: the safe threshold of hydraulic cylinder safety valve is less than the safe threshold of turn-buckle 57.
By liquid injection hole 52 to injection liquid hydraulic fluid in hydraulic cylinder 53, closed support body 8 is risen, supported laneway country rock, when closed support body 8 is close to roadway surrounding rock, stop topping up, use the fillers such as backboard to be filled in the space between closed support body 8 and roadway surrounding rock in a down-to-earth manner, continue to injection liquid hydraulic fluid in hydraulic cylinder 53, make closed support body 8 pairs of roadway surrounding rocks produce active support power, the hydraulic pressure in hydraulic cylinder 53 terminates fluid injection after arriving closed support body 8 nominal resistance.The roadway surrounding rock corresponding with energy-absorption anchor rod (anchor cable) 1 is holed, after hole is formed, energy-absorption anchor rod (anchor cable) 1 is installed, closed support body 8 and roadway surrounding rock is made to form an integer support, improve the supporting intensity to roadway surrounding rock, suspension device is become active support by passive protecting, realizes prestressing force supporting, strengthen country rock residual strength.
Become slowly in deformation process at roadway surrounding rock stream, the closed support body 8 of roadway surrounding rock extruding, when closed support body 8 reaches its yield load, namely when the hydraulic pressure of energy-absorbing connecting rod 5 reaches rated operating pressure, the triple-use valve be connected with the liquid injection hole 52 of energy-absorbing connecting rod 5 starts overflow release, prevent closed support body 8 from exceeding its yield load, produce distortion and fragmentation, when impact dynamic load occurs, roadway surrounding rock is applied with quick intense impact load to closed support body 8, shock loading far exceedes the yield load of closed support body 8, first roadway surrounding rock is applied on energy-absorbing cushion block 3 by the U-shaped steel 2 in outer ring to the effect of closed support body 8, there is elastic-plastic deformation and destruction in the energy-absorbing plate 32 of energy-absorbing cushion block 3, absorption portion impact energy, play cushioning effect, reduce the surge to the U-shaped steel 6 of inner ring, then shock loading is applied on energy-absorbing connecting rod 5 by the U-shaped steel 6 of inner ring, shock loading far exceedes the hydraulic pressure rated operating pressure of energy-absorbing connecting rod 5, the drainage capacity of energy-absorbing connecting rod 5 is limited, can not the release of discharge opeing in time, now the energy-absorbing cylinder 31 of energy-absorbing connecting rod 5 starts to produce relative sliding with pillar 56 and shrinks, by absorption portion impact energy, energy-absorbing cylinder 31 is punctured into roadway surrounding rock and provides deformation space, reduce roadway surrounding rock to the active force of closed support body 8, reduce the pressure of closed support body 8, prevent closed support body 8 overall collapse from destroying, whole tunnel is avoided to cave in,
Energy-absorbing connecting rod 5 and card are pulled 4 liquid injection hole 52 serial communication that are hinged and energy-absorbing connecting rod 5 and are had the function automatically adjusting closed support body 8 support force, when back pressure increase, closed support body 8 increases perpendicular to back directional pressure, closed support body 8 will shrink along perpendicular to back direction, the support force that closed support body 8 is parallel to back direction simultaneously also increases thereupon, namely the support force of closed support body 8 pairs of roadway's sides increases, roadway's sides is subject to support force, the compressive strength of roadway's sides country rock can be increased, improve roadway's sides country rock to the support force of top board, and then reduce back to the pressure of closed support body 8, realize closed support body 8 to adjust with the automatic stress of roadway surrounding rock in deformation process, significantly improve the supporting intensity to overall roadway surrounding rock.
Claims (10)
1. a combined type circular tunnel energy-absorbing erosion control suspension device, it is characterized in that comprising some sections of arc frames, distance is left between adjacent arc frame, form inc circular support body, be connected by energy-absorbing connecting rod between adjacent arc frame, form closed support body, arc frame is by outer girth sheets, several energy-absorbing cushion blocks and interior girth sheets composition, outer girth sheets, energy-absorbing cushion block and interior girth sheets are arc, and the diameter of outer girth sheets is greater than the diameter of interior girth sheets, and being arranged on the outside of interior girth sheets, energy-absorbing cushion block is arranged between outer girth sheets and interior girth sheets, in every section, girth sheets is all pulled by card with the two ends of outer girth sheets and is connected, and inside interior girth sheets, card fastens and be provided with card and pull hinged-support, outside girth sheets is provided with energy-absorption anchor rod, described energy-absorbing cushion block is made up of energy-absorbing urceolus and several energy-absorbing plates be arranged in energy-absorbing urceolus, the sidewall of the energy-absorbing urceolus adjacent with inside and outside girth sheets is provided with guide rail, guide rail matches with inside and outside girth sheets respectively, inside and outside girth sheets can along the slide of energy-absorbing urceolus, energy-absorbing plate is the plate that surface has hollow boss, and the diametric(al) of energy-absorbing plate circular support body along place is successively set on the inside of energy-absorbing urceolus, described energy-absorbing connecting rod comprises hydraulic cylinder, pillar and energy-absorbing cylinder, the bottom of hydraulic cylinder is fixed with left hinged suspension ring head, piston is provided with in hydraulic cylinder, hydraulic cylinder sidewall on the left of piston is provided with liquid injection hole, fixedly there is at the right-hand member of hydraulic cylinder the cylinder cap of through hole, the internal diameter of cylinder cap is less than the external diameter of piston, the left end of pillar is connected with piston by the through hole of cylinder cap, the right-hand member of pillar is arranged on energy-absorbing cylinder left end inside, energy-absorbing cylinder left end sidewall is provided with groove, the energy-absorbing drum outer wall with groove is provided with several turn-buckles, the bottom of energy-absorbing cylinder is fixed with right hinged suspension ring head.
2. combined type circular tunnel energy-absorbing erosion control suspension device according to claim 1, it is characterized in that described card pull fasten plate by card, fastening bolt, card pull lower plate and form, card is fastened plate and is matched with outer girth sheets, card is pulled lower plate and is matched with interior girth sheets, card is fastened plate and is pulled lower plate with card and be fixedly connected with by fastening bolt, described card is pulled hinged-support and is fixed on card and pulls in lower plate, and the left and right hinged suspension ring head of described energy-absorbing connecting rod and the adjacent card of adjacent arc frame are pulled hinged-support and be hinged.
3. combined type circular tunnel energy-absorbing erosion control suspension device according to claim 1, is characterized in that the cross section of described inside and outside girth sheets is circular, square or U-shaped.
4. combined type circular tunnel energy-absorbing erosion control suspension device according to claim 1, is characterized in that the distance left between described adjacent arc frame is identical.
5. combined type circular tunnel energy-absorbing erosion control suspension device according to claim 1, is characterized in that described energy-absorbing plate is the plate that a side surface has hollow boss.
6. combined type circular tunnel energy-absorbing erosion control suspension device according to claim 1, is characterized in that adjacent described energy-absorbing plate is arranged on the inside of energy-absorbing urceolus according to protruding relative with projection or that plate is relative with plate mode.
7. combined type circular tunnel energy-absorbing erosion control suspension device according to claim 1, is characterized in that the hollow boss of described energy-absorbing plate is truncated cone-shaped.
8. combined type circular tunnel energy-absorbing erosion control suspension device according to claim 1, is characterized in that described pillar is connected with screw thread with between piston.
9. combined type circular tunnel energy-absorbing erosion control suspension device according to claim 1, is characterized in that described hydraulic cylinder is connected with screw thread with between cylinder cap.
10. combined type circular tunnel energy-absorbing erosion control suspension device according to claim 1, is characterized in that the port of described turn-buckle is connected by turn-buckle screw rod, turn-buckle nut.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310555082.1A CN103557020B (en) | 2013-11-07 | 2013-11-07 | Energy-absorption and impact-prevention supporting and protecting device for combined type circular tunnel |
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| CN201310555082.1A CN103557020B (en) | 2013-11-07 | 2013-11-07 | Energy-absorption and impact-prevention supporting and protecting device for combined type circular tunnel |
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| CN103557020B true CN103557020B (en) | 2015-07-01 |
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| CN104653201B (en) * | 2015-02-11 | 2017-02-22 | 杨晓东 | Hexagonal short arm half-opened support and construction process thereof |
| CN107237643B (en) * | 2017-08-14 | 2023-03-21 | 成都理工大学 | Novel hydraulic resistance-increasing type tunnel pressure-yielding device |
| CN110863845B (en) * | 2019-12-03 | 2021-06-01 | 宁波朗达工程科技有限公司 | Double-layer telescopic steel arch frame |
| CN112523776B (en) * | 2020-11-23 | 2022-03-08 | 安徽理工大学 | Thin bedrock supporting construction |
| CN112431596B (en) * | 2020-11-26 | 2022-02-15 | 中煤科工开采研究院有限公司 | Three-stage prevention and control method for rock burst roadway |
| CN112943294B (en) * | 2021-02-07 | 2023-07-07 | 湖南科技大学 | Assembled roadway reinforcement supporting structure |
| CN114970161B (en) * | 2022-05-30 | 2023-09-22 | 中南大学 | Integrated method for stability analysis and energy absorption support of joint roadway block |
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