CN102926805A - Flexible wave blocking wall for underground explosion impact disaster protection - Google Patents
Flexible wave blocking wall for underground explosion impact disaster protection Download PDFInfo
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- CN102926805A CN102926805A CN2012104379376A CN201210437937A CN102926805A CN 102926805 A CN102926805 A CN 102926805A CN 2012104379376 A CN2012104379376 A CN 2012104379376A CN 201210437937 A CN201210437937 A CN 201210437937A CN 102926805 A CN102926805 A CN 102926805A
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Abstract
The invention discloses a flexible wave blocking wall for underground explosion impact disaster protection. Overpressure is respectively calculated in accordance with explosion impact wave situations under clamping conditions according to underground construction layout situations and an explosion design scheme, and the flexible wave blocking wall is arranged at underground roadway outlets, slope road openings and other areas of personnel and equipment needing protecting. A flexible net is formed by mutually intersecting net ropes, an edge is matched with an edge contour of a tunnel for blocking and weakening underground explosion impact waves and avoiding underground explosion impact disasters, an anchor rod is anchored on the top portion and two walls of the tunnel, 4/5 of the anchor rod is embedded in the top portion or a wall body of the tunnel, the flexible net is formed by mutually intersecting the net ropes in the transverse direction and the slant direction, a buffer bag is overlapped beside the flexible net, the buffer bag is overlapped to the top portion of the tunnel along the flexible net to form a buffer wall, and the buffer wall and the flexible net form the wave blocking wall. The flexible wave blocking wall is safe, high in efficiency, low in cost, easy to built, capable of effectively blocking and weakening air impact waves in an explosion process and capable of avoiding underground explosion disasters.
Description
Technical field
The present invention relates to a kind of protective equipment of tunnel blasting shock wave, particularly a kind of flexible wave arrestment wall.
Background technology
In mine and all kinds of tunneling process, often need to use explosive to carry out explosion, produce the shock wave of huge energy in the blasting process, explosion wave has powerful destruction to surrounding environment, to site plant and building composition serious threat; Because the restriction of place and communications and transportation, we can not evacuate to equipment and personnel beyond the home of explosion in the actual life.In order to weaken or eliminate the destruction of shock wave, people have invented the measure of many weakening air-shock waves, and gear wave wall is exactly very effective a kind of.So-called gear wave wall namely is the barricade of building the obstruction shock motion of one certain altitude and thickness in the tunnel internal appropriate location.
We know powder charge blast initial stage in air, shock wave to around propagate explosion product supply shock wave energy constantly in expansion process.Experiment shows, approximately has 70% Explosive Energy to pass to air-shock wave, and this shock wave may cause in various degree harm to building and personnel in certain distance.
Existing gear wave wall generally adopts the gear wave wall of concrete or barnacle, be provided with under the prerequisite of gear wave wall, the shock wave that blast produces, the air-flow particle at its wave surface place and gear wave wall meet and instantaneously namely are prevented from, then descend the motion particle of one deck also to be prevented from, stop to the motion of the incidence wave direction of propagation, at this moment the high voltage static district just appears near gear wave wall, when particle returns expansion from gear wave wall, just produce back wave, thereby changed the direction of air-shock wave, the party is made progress, gear wave wall is to building and the personnel of certain distance have played protective action thereafter.When normal reflection occured, wall front pressure increased, but the positive pressure of shock wave beyond the wall edge do not increase, so it is poor to have formed superpressure, and had caused flowing of air; When the air in wall reflecting high voltage district flows to the area of low pressure beyond the wall edge, the velocity of sound of rarefaction wave after with back wave propagated to the centre from mural margin, after after a while, the positive suffered pressure of wall is circulation pressure, and near the air-flow in wall front this moment is in metastable state; After after a while, shock wave arrives the back side through side and end face again, and along with the increase of time, pressure reaches maximum value.The circulation pressure that forms afterwards is just along with the increase of propagation distance decays to sound wave gradually.Generally speaking, shock wave is trapped in tunnel internal by gear wave wall, and the energy of shock wave is rapidly decay in impacting wave propagation and reflection process, the final disappearance; Sillar and the gear wave wall Contact of being dished out in a large number in the blasting process simultaneously are subject to flexible gear wave wall reaction force and are blocked.Therefore gear wave wall has played the weakening air-shock wave, has avoided the effect of tunnel blasting disaster.
Domestic the following retaining wall or the similar retaining wall technology of disclosing.
1, [title] strengthens the construction method of shotfiring safety gear wave wall, [patent No.] CN200310106599.9, the patent documentation of [publication number] CN1546817 discloses a kind of construction method of shotfiring safety gear wave wall, it is characterized in that take center, quick-fried source as the center of circle, the gear wave wall of annular or circular arc is set, the interior ring radius r of gear wave wall=0.64
Rice, height H=1.277
Rice, the vertical section is right-angled trapezium, and top width is a=0.75～1 meter, and hypotenuse and base angle are α=65 °～75 °.Gear wave wall is preferably selected the in-built sandy soil of woven bag, and dense packing becomes the main body of wall, stacks the hay bundle along the gear wave wall inwall, and with clay it is fixed.
2, [title] a kind of rock-gangway bomb-dug net-type soft waste rock blocking wall, [application number] CN201120203486.0, [publication number] CN202157815U discloses a kind of rock-gangway bomb-dug net-type soft waste rock blocking wall, comprise flexible rack, the edge of flexible rack and tunnel edge contour coupling, flexible rack edge is provided with a plurality of locking-type plugs, and each locking-type plug inserts in the tunnel-side respectively.After blowing out, the sillar of dishing out is in a large number dished out, when cash piece and soft waste rock blocking wall Contact, be subject to soft waste rock blocking wall to cycle change reaction force and be blocked, rebound.
Above-mentioned existing gear wave wall adopts the gear wave wall of concrete or barnacle, to a certain extent the explosion air-shock wave is played certain barrier effect, can effectively avoid the tunnel blasting disaster.But existing gear wave wall faces and but has many problems and defective, mainly be the time of constructing long, remove difficulty, the material recycling rate of waterused is low, and is difficult to construction in the relatively poor zone of rock-mass quality, in the use procedure as occur destroying and then be difficult to maintenance.And the rock of dishing out in the blasting process can effectively be tackled, be reflected in to gear cash wall, and the time of constructing is short, removes simple and easy, easy to maintenance.But the shock wave that can not effectively stop destructive power is arranged, and the blasting damage prevention is limited in one's ability.Therefore in mine and all kinds of tunneling process, be badly in need of a kind of novel overall height effect, with low cost, be easy to build and dismounting and the high tunnel blasting of material recycling rate of waterused impact the disaster prevention facility, think and satisfy the modern needs that excavate.
Summary of the invention
The invention provides a kind of flexible wave arrestment wall that impacts disaster prevention for underground explosion, solve the problem that tradition shelves ripple wall cost is high, recycling rate of waterused is low.
Flexible wave arrestment wall of the present invention is arranged on tunnel internal, comprise flexible net and anchor pole, flexible net forms by nettle is interlaced, edge and tunnel edge contour coupling, be used for stopping, weaken the tunnel blasting shock wave, avoid tunnel blasting to impact disaster, tunnel top and Liang Bi are fixed with anchor pole, anchor pole 4/5ths length embed top or the body of wall in tunnel, and nettle is wrapped on the anchor pole bared end, and in horizontal and the oblique interlaced flexible net that is shaped as, flexible net next door is also stacking a buffers packet, buffers packet is along being stacked to the tunnel, top according to flexible net, and forms cushion wall, and cushion wall and flexible net have formed gear wave wall.
The nettle of flexible net adopts wire rope, adds up to 7～9, and incline direction arranges 2～3, and horizontal direction arranges 5～6; The height of buffers packet is greater than the height of any one grid of flexible net; The filler of buffers packet is common sandy soil, grit; The thickness of gear wave wall is definite according to the superpressure numerical value of air-shock wave under the clipping condition, and relies on change to adjust along tunnel direction heap row buffers packet, and generally piling the row buffers packet is 1～8 row; The position basis that gear wave wall is arranged in the tunnel is determined by calculating clipping condition airblast overpressure numerical value and influence basin.
The flexible wave arrestment wall construction that the present invention is used for underground explosion impact disaster prevention is very simple, after accomplishing fluently anchor pole and arranging nettle, only the buffers packet of well in advance need be transported to the scene and install, and has greatly improved the efficient of constructing of gear wave wall; The thickness of gear wave wall can be adjusted by the buffers packet number of plies, can adapt to the Blasting shock wave of various intensity; Flexible gear wave wall is convenient to construct and remove, and is less to Influence of production; After flexible gear wave wall was removed, its wire rope and buffering packaging material material were reusable, can effectively reduce cost; Simultaneously a kind of flexible wave arrestment wall for underground explosion impact disaster prevention is provided with the stacking cushion wall that forms of a large amount of buffers packet, and the sillar of dishing out when can effectively stop explosion also plays a protective role to flexible net.
Description of drawings
Fig. 1 is the structural representation of flexible wave arrestment wall of the present invention.
Fig. 2 is flexible net structure chart of the present invention.
Among the figure: 1-flexible net; 2-anchor pole; 3-nettle; 4-tunnel; 5-buffers packet; 6-cushion wall; 7-gear wave wall.
The specific embodiment
The invention will be further described with reference to the accompanying drawings and in conjunction with the specific embodiment for the below.
Such as Fig. 1, shown in 2, the flexible wave arrestment wall that is used for underground explosion impact disaster prevention is arranged on 4 inside, tunnel, comprise flexible net 1 and anchor pole 2, flexible net is by nettle 3 interlaced forming, edge and tunnel edge contour coupling, be used for stopping, weaken the tunnel blasting shock wave, avoid tunnel blasting to impact disaster, tunnel top and Liang Bi are fixed with anchor pole, top or the body of wall in anchor pole four length embedding in five minutes tunnel, nettle is wrapped on the anchor pole bared end, and laterally and the oblique interlaced flexible net that is shaped as, the flexible net next door is also stacking a buffers packet 5, and buffers packet is along be stacked to the tunnel, top according to flexible net, and forming cushion wall 6, cushion wall and flexible net have formed gear wave wall 7.
Nettle is wire rope, and nettle adds up to 7～9, and incline direction arranges 2～3, and horizontal direction arranges 5～6; The height of buffers packet is greater than the height of any one grid of flexible net; The filler of buffers packet is common sandy soil, grit; The thickness of gear wave wall is determined according to the superpressure numerical value of air-shock wave under the clipping condition, and is relied on change to adjust along the stacking number of plies of the buffers packet of tunnel direction; The position basis that gear wave wall is arranged in the tunnel is determined by calculating clipping condition airblast overpressure numerical value and influence basin.
The flexible gear wave wall that impacts disaster prevention for tunnel blasting provided by the invention, at first engineering deployment scenarios and blasting design scheme under the base area, calculate down-hole great explosion airblast overpressure numerical value and influence basin under the clipping condition, and draw a circle to approve subterranean tunnel outlet, road junction, slope and the personnel that need protection and facility in this scope; Then construct flexible gear wave wall in the selected suitable place of above-mentioned zone; During construction, at first help to squeeze into anchor pole at the selected tunnel top and two of constructing flexible gear wave wall zone, then by designing in advance wirerope-winding on the anchor pole bared end, the mutual overlapping formation flexible net of wire rope, the interval is unsuitable excessive between the wire rope, to guarantee that buffers packet can be from landing between wire rope.After wire rope has arranged, buffers packet is nestled up wire rope carry out stackingly, form cushion wall, in order to guarantee protection effect, buffers packet should be stacked to tunnel top, and the thickness of gear wave wall can be adjusted by the buffers packet number of plies, and cushion wall and flexible net form gear wave wall.
When implementing explosion in the tunnel, produce the shock wave of powerful energy at place, explosion source, and a large amount of rocks of dishing out; Shock wave is along the tunnel bamboo telegraph, in the moment that contacts with gear wave wall, at first is cushioned wall and stops and lose a large amount of kinetic energy, in promoting the process that buffers packet advances, is subject to again the linear reaction force that increases of flexible net, and shock wave energy is rapidly decay again.After gear wave wall contacted, the shock wave major part was reflected, and fraction sees through gear wave wall and escapes outside the tunnel, and the reflecting part will repeatedly be stopped in the tunnel and constantly decay to sound wave until disappear; And the escape part, because energy is too little, external equipment and personnel can not consist of injury.A large amount of rocks of being dished out during the explosion, the upper gear wave wall of part bump also is blocked, and can not constitute a threat to external equipment and personal security.Many-sided comparable situation table of tunnel blasting flexible gear ripple and traditional gear wave wall is as follows.
Table 1: flexible wave arrestment wall of the present invention and traditional gear wave wall contrast table.
Therefore flexible wave arrestment wall of the present invention be a kind of efficient, cheap, be easy to build and dismounting and the high tunnel blasting of material recycling rate of waterused impact the disaster prevention facility; Can effectively stop in the blasting process, weaken air-shock wave, avoid the tunnel blasting disaster.
Claims (6)
1. one kind is used for the flexible wave arrestment wall that disaster prevention is impacted in underground explosion, be arranged on tunnel internal, comprise flexible net (1) and anchor pole (2), flexible net (1) is by interlaced the forming of nettle (3), and edge and tunnel (4) edge contour coupling, be used for stopping, weaken the underground explosion shock wave, avoid underground explosion to impact disaster, it is characterized in that: (4) top, tunnel and Liang Bi are fixed with anchor pole (2), anchor pole (2) 4/5ths length embed top or the body of wall in tunnel (4), nettle (3) is wrapped on anchor pole (2) bared end, and in horizontal and the oblique interlaced flexible net (1) that is shaped as, flexible net (1) next door is also stacking a buffers packet (5), buffers packet (5) is along be stacked to top, tunnel (4) according to flexible net (1), and forming cushion wall (6), cushion wall (6) and flexible net (1) have formed gear wave wall (7).
2. flexible wave arrestment wall according to claim 1, it is characterized in that: described nettle (3) is wire rope.
3. flexible wave arrestment wall according to claim 1, it is characterized in that: the nettle (3) of flexible net (1) adds up to 7～9, and incline direction arranges 2～3, and horizontal direction arranges 5～6.
4. flexible wave arrestment wall according to claim 1, it is characterized in that: the height of buffers packet (5) is greater than the height of any one grid of flexible net (1).
5. according to claim 1 or 4 arbitrary described flexible wave arrestment walls, it is characterized in that: buffers packet is provided with filler in (5), and filler is common sandy soil, grit.
6. flexible wave arrestment wall according to claim 1 is characterized in that: the heap number of columns of buffers packet (5) (4) direction along the tunnel is 1～8 row.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012104379376A CN102926805A (en) | 2012-11-06 | 2012-11-06 | Flexible wave blocking wall for underground explosion impact disaster protection |
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| CN2012104379376A CN102926805A (en) | 2012-11-06 | 2012-11-06 | Flexible wave blocking wall for underground explosion impact disaster protection |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103306724A (en) * | 2013-06-25 | 2013-09-18 | 中国矿业大学(北京) | Convex cage-shaped closed gob energy-absorbing structure and construction method thereof |
| CN104061828A (en) * | 2014-07-02 | 2014-09-24 | 江俊 | Vertical shaft blasting safety protection device and vertical shaft blasting construction method |
| CN106290019A (en) * | 2016-10-14 | 2017-01-04 | 安徽理工大学 | Protection works failure test system and method under a kind of thump effect |
| CN106290016A (en) * | 2016-10-25 | 2017-01-04 | 安徽理工大学 | A kind of underground air impact disaster assay device |
| CN110057260A (en) * | 2019-05-28 | 2019-07-26 | 湘潭大学 | A kind of pipe gallery construction blasting isolating device |
| CN110284927A (en) * | 2019-07-26 | 2019-09-27 | 内蒙古科技大学 | One kind adopting lower gob collapse autoamtic protection device for forming based on dew well connection |
| CN110500135A (en) * | 2019-08-15 | 2019-11-26 | 国家电网有限公司 | A kind of tunnel entrance wind shielding structure and its construction method |
| CN114320339A (en) * | 2021-12-20 | 2022-04-12 | 攀钢集团工程技术有限公司 | Buffering damping device for preventing blasting damage of tunnel portal |
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| CN201884065U (en) * | 2010-04-09 | 2011-06-29 | 河南理工大学 | Mine tunnel heat insulation and fire prevention composite wall |
| CN203008969U (en) * | 2012-11-06 | 2013-06-19 | 广西华锡集团股份有限公司铜坑矿 | Flexible wave trapping wall used for underground blast impact disaster protection |
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| DE2352869A1 (en) * | 1973-10-22 | 1975-04-30 | Wolfgang Arheiliger | Thresholdless sealed two-phase lifting and turning door - with first opening movement in plane vertical to closing plane enclosing acute angle |
| FR2352869A1 (en) * | 1976-05-26 | 1977-12-23 | Blond Hubert | Plastic stopping compsn. for stopping holes etc. in mines - comprises clay block sheathed in plastic envelope |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103306724A (en) * | 2013-06-25 | 2013-09-18 | 中国矿业大学(北京) | Convex cage-shaped closed gob energy-absorbing structure and construction method thereof |
| CN103306724B (en) * | 2013-06-25 | 2015-07-08 | 中国矿业大学(北京) | Convex cage-shaped closed gob energy-absorbing structure and construction method thereof |
| CN104061828A (en) * | 2014-07-02 | 2014-09-24 | 江俊 | Vertical shaft blasting safety protection device and vertical shaft blasting construction method |
| CN104061828B (en) * | 2014-07-02 | 2015-11-25 | 江俊 | Vertical shaft blasting safety protection device and vertical shaft blasting construction method |
| CN106290019A (en) * | 2016-10-14 | 2017-01-04 | 安徽理工大学 | Protection works failure test system and method under a kind of thump effect |
| CN106290019B (en) * | 2016-10-14 | 2021-02-26 | 安徽理工大学 | Protection engineering damage test system and method under strong impact action |
| CN106290016A (en) * | 2016-10-25 | 2017-01-04 | 安徽理工大学 | A kind of underground air impact disaster assay device |
| CN106290016B (en) * | 2016-10-25 | 2018-11-20 | 安徽理工大学 | A kind of underground air impact disaster experimental rig |
| CN110057260A (en) * | 2019-05-28 | 2019-07-26 | 湘潭大学 | A kind of pipe gallery construction blasting isolating device |
| CN110284927A (en) * | 2019-07-26 | 2019-09-27 | 内蒙古科技大学 | One kind adopting lower gob collapse autoamtic protection device for forming based on dew well connection |
| CN110500135A (en) * | 2019-08-15 | 2019-11-26 | 国家电网有限公司 | A kind of tunnel entrance wind shielding structure and its construction method |
| CN114320339A (en) * | 2021-12-20 | 2022-04-12 | 攀钢集团工程技术有限公司 | Buffering damping device for preventing blasting damage of tunnel portal |
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Application publication date: 20130213 |