CN115710870A - Open cut tunnel capable of preventing debris flow - Google Patents
Open cut tunnel capable of preventing debris flow Download PDFInfo
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- CN115710870A CN115710870A CN202211370667.1A CN202211370667A CN115710870A CN 115710870 A CN115710870 A CN 115710870A CN 202211370667 A CN202211370667 A CN 202211370667A CN 115710870 A CN115710870 A CN 115710870A
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- 230000008878 coupling Effects 0.000 claims description 5
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- 239000004575 stone Substances 0.000 claims description 4
- 239000011435 rock Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 11
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- XLYOFNOQVPJJNP-ZSJDYOACSA-N Heavy water Chemical compound [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 4
- 230000002265 prevention Effects 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
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- 230000005389 magnetism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002028 premature Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 238000005381 potential energy Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Abstract
The invention relates to the technical field of tunnel open cut tunnels, and particularly discloses a debris flow-preventing open cut tunnel which comprises an open cut tunnel and a lifting assembly, wherein the lifting assembly is arranged on the lower side of the open cut tunnel and is fixedly connected with the open cut tunnel. According to the invention, by arranging a half of the open cut tunnel in the mountain body, the impact area of the debris flow on the open cut tunnel is reduced, the open cut tunnel is protected, the inclination of the protection plate at the top of the open cut tunnel is controlled through the lifting structure, so that the front collision between the top of the open cut tunnel and the debris flow is avoided, and the debris flow is guided through the inclination angle of the protection plate, so that the open cut tunnel is prevented from being damaged by being washed.
Description
Technical Field
The invention relates to the technical field of tunnel open cut tunnels, and particularly discloses a debris flow prevention open cut tunnel.
Background
Mountain roads are often the only passages for entering and exiting mountain areas, and the traffic is vital to ensure smooth traffic, so that the influence of continuous rainfall occurs when rainy seasons come this year, and the side slopes of the mountain roads in the areas such as the Sichuan Alba and the Jiuzhaigou frequently fall rocks and slide slopes, so that great economic loss and even casualties are caused. When a disaster occurs, the open cut tunnel plays a good protection role, and the driving safety of the disaster-stricken road section is directly protected. However, landslide or falling rocks are accumulated on the top of the open cut tunnel to cause overload on the top of the open cut tunnel, so that the open cut tunnel structure is cracked, and the risk of structural damage is caused, therefore, after a disaster occurs, the overload on the top of the open cut tunnel needs to be treated, and the traditional method generally comprises two measures: firstly clear up the landslide body, secondly consolidate the open cut tunnel structure, however, to the material source is abundanter, probably take place the highway section of secondary or even landslide many times, the tradition is done the law down and has had to take place once every time the landslide will be handled, greatly increased each place emergency rescue department work load.
Disclosure of Invention
In view of this, the present invention provides a cut tunnel for preventing debris flow, so as to solve the technical problem that the cut tunnel is damaged by debris flow.
In order to achieve the purpose, the invention provides the following technical scheme:
the open cut tunnel capable of preventing debris flow comprises an open cut tunnel and a lifting assembly, wherein the lifting assembly is arranged on the lower side of the open cut tunnel and is fixedly connected with the open cut tunnel; the open cut tunnel comprises an outer side wall, an inner side wall, a top plate, a stone-proof top, a bottom pillar and a road plate, wherein the outer side wall, the inner side wall, the top plate and the road plate are enclosed to form a square, the stone-proof top is arranged on the upper side of the top plate, the bottom pillar is arranged on the lower side of the road plate, the open cut tunnel is arranged on the side edge of a mountain body and used for preventing the situation that the mountain body slides on a slope, a right-angled trapezoidal inner groove is firstly dug in the mountain body before the open cut tunnel is built, one side of the open cut tunnel is arranged in the mountain body and is built with the mountain body at one time, therefore, the structural strength of the open cut tunnel can be enhanced, the open cut tunnel is not prone to collapse, the bearing capacity of the open cut tunnel is higher, the service life of the open cut tunnel is prolonged, and a light-transmitting area is arranged on the outer side wall and used for transmitting light in the open cut tunnel in daytime, so that the amount of light is small and energy is saved.
Preferably, the stone roof is divided into a left roof and a right roof, the left roof is movably connected with the right roof, the left roof comprises a shaft fixing table and a roof shaft, a confluence groove, a buffer groove and a flow port are arranged on the upper top surface of the right roof, a plurality of anti-collision structures are further arranged on the right roof, each anti-collision structure comprises a roof column, two side plates, a cylinder and a spring, shaft grooves are arranged on two sides of the roof column, a rotating shaft is arranged on each shaft groove, a shaft hole is arranged on the upper side of each two side plate, the two side plates are movably connected with the rotating shaft on the shaft grooves, the lower side of the roof column is fixedly connected with the upper side of the cylinder, the spring is sleeved on the cylinder, the upper end and the lower end of the spring support the bottom surface of the roof column and the bottom surface of the buffer groove, and can move downwards when the roof column is under pressure, so that the two side plates expand towards two sides by taking the rotating shaft as an axis, when the opposite plates of the two double-side plates are contacted with each other, the two double-side plates can prevent the top column from continuously descending under the condition of an interaction force, at the moment, the upper top surface of the right top is corrugated, the corrugated top is less in stress degree and higher in structural strength, the open cut tunnel can be better protected from being washed away by debris flow, some water and fine sand particles in the debris flow can flow out of the right top through the flow port through the corrugated notch, the depth of the left top is longer than that of the right top, the two shaft fixing tables are arranged, two ends of the top shaft are fixedly connected with the two shaft fixing tables, the right top is sleeved on the top shaft, the shaft fixing tables and the top shaft are arranged to enable the right top to do circular motion around the top shaft as an axis, the inclination degree of the right top is further changed, and when the debris flow and the like occur, the right top and the left top are at a sixty-degree inclination angle, the debris flow can not gather on the right side top, and can flow down along the slope of slope in order, can not damage the open cut tunnel, and when general condition, the right side top is one hundred thirty-five degrees inclinations with the left side top, increases the shading area of open cut tunnel like this, prevents the part premature loss in the open cut tunnel.
Preferably, the outer side wall is provided with a waterproof structure, the waterproof structure comprises a fixed plate, a sliding rail and a sliding cylinder, the sliding rail is provided with two sliding rails, the side surface of the outer side wall is provided with a light transmission area, the two side edges of the outer side wall are provided with waterproof walls protruding inwards, the sliding plate is fixed on the waterproof walls, the fixed plate is fixed on the inner wall of the outer side wall, when heavy rain or debris flow and other conditions do not occur, the cylinder shaft of the sliding cylinder extends upwards, the sliding plate is pushed upwards until the sliding plate is overlapped with the fixed plate, the light transmission area of the open cut tunnel is in an open state at the moment, light of the open cut tunnel is increased, when heavy water and other conditions occur, the cylinder shaft of the sliding cylinder contracts downwards to drive the sliding plate to move downwards, and at the moment, the sliding plate shields the light transmission area, so that water cannot enter the open cut tunnel or a small amount of water enters the open cut tunnel, and the service life of the open cut tunnel is prolonged.
Preferably, be equipped with the support column on the lateral wall, be equipped with the lift perforation on the support column, be equipped with the lift post in the lift perforation, the support column is the bearing structure in the middle of the light transmission zone, the lift post is the drum to the inner wall of drum is equipped with the internal thread, and the upside and the right side top fixed connection of lift post through the motion on the upper and lower control right side top of lift post, and then change the inclination on right side top, increase the practicality of design.
Preferably, the lifting component comprises a lifting motor, a coupler, a speed reducing structure, a common shaft, a gear set and a screw rod, the gear set is sleeved on the common shaft, the speed reducing structure comprises an inlet shaft, an outlet shaft, a gear wheel, a pinion and a speed reducing shaft, the inlet shaft and the outlet shaft are positioned on the same straight line with the central axis of the gear wheel, the speed reducing shaft is positioned on the same straight line with the central axis of the pinion, permanent magnets are arranged on two sides of the speed reducing shaft, the rotating speed of the speed reducing shaft is reduced through the magnetism of the permanent magnets, the rotating speed is reduced through the transmission mode of the gear wheel and the pinion, the gear wheel and the pinion are respectively provided with two gears, and four gear wheels and four pinion gears are arranged in opposite directions, and two pairwise meshing, the gear train has two intermeshing's bevel gear to constitute, and the gear train has realized the pivoted direction change, elevator motor has the motor fixing base, elevator motor passes through screw fixed connection with the motor fixing base, also be equipped with the fixing base under the reduction structure to the right side of fixing base is equipped with the fluting, be equipped with the bearing in the fluting, the transmission shaft of speed reducer links firmly with the inner wall of bearing to the lead screw passes through threaded connection with the lift post, works through elevator motor, and makes the reduction structure work through the shaft coupling, and the rotational speed reduces under the effect of reduction structure, and makes the sharing axle rotate, makes the lead screw rotate through the gear train, and then makes the lift post reciprocate.
The working principle and the beneficial effects of the scheme are as follows:
according to the invention, half of the open cut tunnel is arranged in the mountain body, so that the impact area of the debris flow on the open cut tunnel is reduced, the open cut tunnel is protected, the inclination of the protection plate at the top of the open cut tunnel is controlled through the lifting structure, so that the front collision between the top of the open cut tunnel and the debris flow is avoided, the debris flow is guided through the inclination angle of the protection plate, the open cut tunnel is prevented from being damaged by washing, the anti-collision structure is also arranged in the anti-collision device, the side plates at two sides of the top column are expanded through the impact force, the corrugated structure is formed on the protection plate, the protection plate is prevented from being damaged by large-block objects of the debris flow, and the practicability of the device is improved.
Drawings
Fig. 1 is a schematic perspective view (state one) of an embodiment of a debris flow-proof open cut tunnel according to the present invention;
fig. 2 is a schematic perspective view (state two) of an embodiment of a debris flow-proof open cut tunnel according to the present invention;
fig. 3 is a schematic perspective view (state three) of an embodiment of a debris flow-proof open cut tunnel according to the present invention;
FIG. 4 is a schematic structural diagram of a lifting assembly in an embodiment of a debris flow-resistant open cut tunnel according to the present invention;
FIG. 5 is a schematic structural diagram of a deceleration structure in an embodiment of a debris flow prevention open cut tunnel according to the present invention;
FIG. 6 isbase:Sub>A cross-sectional view of FIG. 5A-A;
FIG. 7 is a schematic structural diagram of a right side roof in an embodiment of a debris flow prevention open cut tunnel according to the present invention;
the drawings are numbered as follows: the structure comprises an open cut tunnel 1, an outer side wall 101, a waterproof structure 1011, a fixed plate 10111, a sliding plate 10112, a sliding rail 10113, a sliding cylinder 10114, a supporting column 1012, a lifting perforation 1013, a lifting column 1014, an inner side wall 102, a top plate 103, a stone-proof roof 104, a left side roof 1041, a right side roof 1042, a confluence groove 10421, a buffer groove 10422, a spout 10423, an anti-collision structure 10424, a top column 10425, two side plates 10426, a cylinder 10427, a spring 10428, a shaft groove 10429, a shaft fixing table 1043, a top shaft 1044, a bottom column 105, a circuit board 106, a lifting assembly 2, a lifting motor 201, a coupling 202, a deceleration structure 203, a shaft inlet 2031, a shaft outlet 2032, a large gear 2033, a small gear 2034, a deceleration shaft 2035, a permanent magnet 2036, a common shaft 204, a gear set 205, a screw rod 206 and a motor fixing base 207.
Detailed Description
In the description of the present invention, it is to be understood that the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be taken as limiting the scope of the invention.
The following is further detailed by way of specific embodiments:
examples
As shown in fig. 1-7, the open cut tunnel for preventing debris flow comprises an open cut tunnel 1 and a lifting assembly 2, wherein the lifting assembly 2 is arranged at the lower side of the open cut tunnel 1 and is fixedly connected with the open cut tunnel 1.
The open cut tunnel 1 comprises an outer side wall 101, an inner side wall 102, a top plate 103, a stone-proof roof 104, a bottom column 105 and a road plate 106, wherein the outer side wall 101, the inner side wall 102, the top plate 103 and the road plate 106 are encircled to form a square, the stone-proof roof 104 is arranged on the upper side of the top plate 103, and the bottom column 105 is arranged on the lower side of the road plate 106 and is fixedly connected with the road plate 106. Further, the open cut tunnel is arranged on the side edge of the mountain body and used for preventing landslide of the mountain body, before the open cut tunnel is built, a right-angled trapezoid inner groove is firstly dug in the mountain body, one side of the open cut tunnel is arranged in the mountain body and is built with the mountain body at one time, therefore, the structural strength of the open cut tunnel can be enhanced, the open cut tunnel is not easy to collapse, the bearing capacity of the open cut tunnel is higher, the service life of the open cut tunnel is prolonged, and the outer side wall 101 is provided with a light transmitting area for transmitting light in the open cut tunnel, so that the light consumption is low and energy is saved during the day.
The stone-proof roof 104 is divided into a left roof 1041 and a right roof 1042, the left roof 1041 is movably connected with the right roof 1042, the left roof 1041 comprises a shaft fixing table 1043 and a top shaft 1044, and the shaft fixing table 1043 is fixedly connected with the top shaft 1044. Further, the depth of the left top 1041 is greater than the depth of the right top 1041, two shaft fixing tables 1043 are provided, two ends of the top shaft 1044 are fixedly connected with the two shaft fixing tables 1043, the right top 1042 is sleeved on the top shaft 1044, the shaft fixing tables 1043 and the top shaft 1044 are arranged so that the right top 1042 can do circular motion around the top shaft 1044 as an axis, and further the inclination degree of the right top 1042 is changed, when debris flow and the like occur, the right top 1042 and the left top 1041 form an inclination angle of sixty degrees, so that the debris flow cannot be gathered on the right top 1042 and flow down along the inclined slope in sequence, the open cut tunnel cannot be damaged, when general conditions exist, the right top 1042 and the left top 1041 form an inclination angle of thirty-five degrees, and therefore the area of the open cut tunnel is shaded, and premature loss of parts in the open cut tunnel is prevented.
The top surface on right side top 1042 is equipped with confluence groove 10421, buffer tank 10422 and class mouth 10423, still is equipped with crashproof structure 10424 on the right side top 1042, and crashproof structure 10424 is equipped with a plurality ofly. Further, the anti-collision structure 10424 includes a top pillar 10425, two side plates 10426, an air cylinder 10427 and a spring 10428, two side edges of the top pillar 10425 are provided with a shaft slot 10429, the shaft slot 10429 is provided with a rotating shaft, an upper side of the two side plates 10426 is provided with a shaft hole, the two side plates 10426 are movably connected with the rotating shaft on the shaft slot 10429, a lower side of the top pillar 10425 is fixedly connected with an upper side of the air cylinder 10427, the spring 10428 is sleeved on the air cylinder 10427, an upper end and a lower end of the spring 10428 prop against a bottom surface of the top pillar 10425 and a bottom surface of the buffer slot 10422, when the top pillar 10425 is pressed, the top pillar 10425 moves downward, so that the top pillar 10426 expands to two sides with the rotating shaft as an axis, when opposing plates of the two side plates 10426 are in contact with each other, the two side plates 10426 are under a mutual acting force, so that the top pillar 10425 cannot continue to descend, at this time, an upper surface of the right top cap 1042 presents a corrugated shape, a degree of a roof hole is smaller, and a structural strength is higher, so that light debris flow can be better protected, and mud can flow can pass through a few corrugated roof notches 23 of the right side hole 10423.
Be equipped with waterproof construction 1011 on lateral wall 101, waterproof construction 1011 is by fixed plate 10111, sliding plate 10112, slide rail 10113 and slip cylinder 10114, and slide rail 10113 is equipped with two, sliding plate 10112 and two slide rail 10113 sliding connection, the downside fixed connection of slip cylinder 10114 upside and sliding plate 10112. Further, a light transmission area is arranged on the side face of the outer side wall 101, two side edges of the outer side wall 101 are provided with a waterproof wall 1012 protruding inwards, a sliding plate 10112 is fixed on the waterproof wall 1012, a fixing plate is fixed on the inner wall of the outer side wall 101, when heavy rain or debris flow and the like do not occur, the cylinder shaft of the sliding cylinder 10114 extends upwards, the sliding plate 10112 is pushed upwards until the sliding plate 10112 coincides with the fixing plate 10111, the light transmission area of the open cut tunnel is in an open state, light of the open cut tunnel is increased, when heavy water and the like occur, the cylinder shaft of the sliding cylinder 10114 contracts downwards to drive the sliding plate 10112 to move downwards, and at the moment, the sliding plate 10112 shields the light transmission area, so that water cannot enter the open cut tunnel or a small amount of water cannot enter the open cut tunnel, and the service life of the open cut tunnel is prolonged.
The outer side wall 101 is provided with a support column 1012, the support column 1012 is provided with a lifting through hole 1013, and the lifting through hole 1013 is internally provided with a lifting column 1014. Further, the supporting column 1012 is a supporting structure in the middle of the light-transmitting region, the lifting column 1014 is a cylinder, and the inner wall of the cylinder is provided with internal threads, the upper side of the lifting column 1014 is fixedly connected with the right side top 1042, and the movement of the right side top 1042 is controlled by the up-and-down movement of the lifting column 1014, so that the inclination degree of the right side top 1042 is changed, and the design practicability is increased.
The lifting assembly 2 comprises a lifting motor 201, a coupler 202, a speed reducing structure 203, a common shaft 204, a gear set 205 and a screw rod 206, the right side of the lifting motor 201 is fixedly connected with the left side of the coupler 202, the right side of the coupler 202 is fixedly connected with the left side of the speed reducing structure 203, the right side of the speed reducing structure 203 is fixedly connected with the left side of the common shaft 204, the gear set 205 is sleeved on the common shaft 204, and the upper side of the gear set 205 is fixedly connected with the screw rod 206. Further, the gear set 205 is composed of two bevel gears meshed with each other, the gear set 205 achieves the change of the rotating direction, a motor fixing seat 207 is arranged below the lifting motor 201, the lifting motor 201 is fixedly connected with the motor fixing seat 207 through screws, a fixing seat is also arranged below the speed reducing structure 203, a groove is formed in the right side of the fixing seat, a bearing is arranged in the groove, a transmission shaft of the speed reducer is fixedly connected with the inner wall of the bearing, the screw rod 206 is connected with the lifting column 1014 through threads, the lifting motor 201 works, the speed reducing structure 203 works through the coupler 202, the rotating speed is reduced under the action of the speed reducing structure 203, the common shaft 204 rotates, the screw rod 206 rotates through the gear set 205, and then the lifting column 1014 moves up and down.
The speed reducing structure 203 includes an input shaft 2031, an output shaft 2032, a large gear 2033, a small gear 2034 and a speed reducing shaft 2035, the input shaft 2031, the output shaft 2032 and the central axis of the large gear 2033 are on the same straight line, and the speed reducing shaft 2035 and the central axis of the small gear 2034 are on the same straight line. To explain further, permanent magnets 2036 are provided on both sides of the reduction shaft 2035, the rotation speed of the reduction shaft 2035 is reduced by the magnetism of the permanent magnets, and the reduction of the rotation speed is realized by the transmission of large gears 2033 and small gears 2034, and two large gears 2033 and two small gears 2034 are provided, and four large gears 2033 and four small gears 2034 are oppositely provided and are engaged with each other two by two.
The use method of the debris flow prevention open cut tunnel comprises the following steps:
s1, when debris flow occurs, working is carried out through a lifting motor 201, a speed reducing structure 203 works through a coupler 202, the rotating speed is reduced under the action of the speed reducing structure 203, a common shaft 204 rotates, a screw rod 206 rotates through a gear set 205, and then a lifting column 1014 moves downwards;
s2, the lifting column 1014 moves downwards to enable the right side top 1042 and the left side top 1041 to form a sixty-degree inclination angle, so that debris flow cannot be gathered on the right side top 1042 and can flow down along the inclined gradient in sequence, and the open cut tunnel cannot be damaged;
s3, when the massive object of debris flow falls onto right side top 1042, top column 10425 receives pressure, can move down, and then make two curb plates 10426 use the pivot to expand to both sides as the axis, when the subtend board of two curb plates 10426 contacted each other, two curb plates 10426 are under the circumstances of interact power, make top column 10425 can not continue to descend, at this moment, the upper surface of right side top 1042 is present the flute form, the top stress degree of flute form is littleer, and structural strength is higher, the protection open cut tunnel that can be better can not be washed out by the debris flow, after the debris flow, top column 10425 receives the elastic potential energy of spring 10428, the reconversion.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the present invention.
Claims (8)
1. The utility model provides a prevent open cut tunnel of mud-rock flow which characterized in that: the open cut tunnel comprises an open cut tunnel and a lifting assembly, wherein the lifting assembly is arranged on the lower side of the open cut tunnel and is fixedly connected with the open cut tunnel.
2. A debris flow-proof open cut tunnel according to claim 1, wherein: the open cut tunnel includes lateral wall, inside wall, roof, prevents stone top, sill pillar and way board, lateral wall, inside wall, roof and way board surround into a square, prevent that the stone top locates the roof upside, the sill pillar locate the way board downside and with way board fixed connection.
3. A debris flow-proof open cut tunnel according to claim 2, wherein: prevent the stone top and divide into left side top and right side top, left side top and right side top swing joint, the left side top includes axle fixed station and apical axis, axle fixed station and apical axis fixed connection.
4. A debris flow-proof open cut tunnel according to claim 3, wherein: the last top surface on right side top is equipped with converges groove, dashpot and class mouth, the right side top still is equipped with crashproof structure, crashproof structure is equipped with a plurality ofly.
5. A debris flow-resistant open cut tunnel according to claim 2, wherein: the outer side wall is provided with a waterproof structure, the waterproof structure comprises a fixed plate, two sliding plates, two sliding rails and two sliding cylinders, the sliding plates are connected with the two sliding rails in a sliding mode, and the upper sides of the sliding cylinders are fixedly connected with the lower sides of the sliding plates.
6. A debris flow-proof open cut tunnel according to claim 2, wherein: the outer side wall is provided with a supporting column, the supporting column is provided with a lifting perforation, and a lifting column is arranged in the lifting perforation.
7. A debris flow-proof open cut tunnel according to claim 1, wherein: lifting unit includes elevator motor, shaft coupling, reduction structure, publicly do all, gear train and lead screw, elevator motor right side and shaft coupling left side fixed connection, shaft coupling right side and reduction structure left side fixed connection, reduction structure right side and the nearly all left side fixed connection of saying, the gear train cover is located on the publicly say, gear train upside and lead screw fixed connection.
8. A debris flow-proof open cut tunnel according to claim 7, wherein: the speed reduction structure comprises an inlet shaft, an outlet shaft, a large gear, a small gear and a speed reduction shaft, wherein the inlet shaft, the outlet shaft and the central axis of the large gear are positioned on the same straight line, and the speed reduction shaft and the central axis of the small gear are positioned on the same straight line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211370667.1A CN115710870B (en) | 2022-11-03 | 2022-11-03 | Prevent open cut tunnel of mud-rock flow |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211370667.1A CN115710870B (en) | 2022-11-03 | 2022-11-03 | Prevent open cut tunnel of mud-rock flow |
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| CN115710870A true CN115710870A (en) | 2023-02-24 |
| CN115710870B CN115710870B (en) | 2024-06-21 |
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