CN217107024U - Underground shield in-situ disassembly chamber for coal mine inclined shaft - Google Patents
Underground shield in-situ disassembly chamber for coal mine inclined shaft Download PDFInfo
- Publication number
- CN217107024U CN217107024U CN202123442065.6U CN202123442065U CN217107024U CN 217107024 U CN217107024 U CN 217107024U CN 202123442065 U CN202123442065 U CN 202123442065U CN 217107024 U CN217107024 U CN 217107024U
- Authority
- CN
- China
- Prior art keywords
- chamber
- shield
- steel
- parking platform
- steel frame
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a coal mine inclined shaft underground shield in-situ disassembly chamber, which comprises an inclined shaft, a disassembly chamber transportation channel and an auxiliary transportation roadway which are sequentially communicated; the disassembled chamber and the disassembled chamber transportation channel are both channel structures with arc-shaped tops, and the channel height of the disassembled chamber is greater than that of the disassembled chamber transportation channel; the dismantling chamber comprises a parking platform area and an anti-arch area which are communicated, the parking platform area is arranged on one side close to the transportation channel of the dismantling chamber, the anti-arch area is arranged on one side of the inclined shaft, and the bottom of the parking platform area is higher than that of the anti-arch area. The utility model discloses a slant pit shaft, disassemble the chamber, disassemble the reasonable setting of chamber transportation passageway and auxiliary transport tunnel, showing and strengthening the normal position shield and constructing the intensity of disassembling the chamber, promoted the security that the shield constructs the disassembling.
Description
Technical Field
The utility model relates to a coal underground mining technical field, especially a coal mine inclined shaft shield constructs normal position in pit and disassembles chamber.
Background
At present, with the continuous development of economic construction and society of China, many underground engineering or facility equipment under construction and to be newly built continuously moves to deep parts, so that the requirement of construction of long-distance inclined shafts on tunneling technology is higher and higher. The shield inclined shaft construction front terminal is always underground, so in-situ disassembly is needed, and the construction is usually carried out by adopting a terminal expansion chamber disassembly method. In the soft rock deep-buried long-distance shield in-situ disassembly chamber, the water pressure and the soil pressure acting on the shield are both large, so that under the condition of rich water with large burial depth, the shield disassembly causes the water leakage of the segment joints, even forms a water inrush channel, and the design mode of the in-situ shield disassembly chamber is damaged; meanwhile, the defects in the design also can seriously affect the disassembly safety of the shield, and further affect the quality of the inclined shaft and the safety during the operation of the inclined shaft. Therefore, a new underground shield in-situ disassembly chamber structure needs to be provided for solving the problems in the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a colliery inclined shaft shield constructs normal position in pit and disassembles chamber for there is the defect and influences the shield structure to disassemble safe problem in the solution current chamber structure of disassembling.
In order to solve the technical problem, the utility model provides a coal mine inclined shaft underground shield in-situ disassembly chamber, which comprises an inclined shaft, a disassembly chamber transportation channel and an auxiliary transportation roadway which are sequentially communicated; the disassembled chamber and the disassembled chamber transportation channel are both channel structures with arc-shaped tops, and the channel height of the disassembled chamber is greater than that of the disassembled chamber transportation channel; the dismantling chamber comprises a parking platform area and an anti-arch area which are communicated, the parking platform area is arranged on one side close to the transportation channel of the dismantling chamber, the anti-arch area is arranged on one side of the inclined shaft, and the bottom of the parking platform area is higher than that of the anti-arch area.
Preferably, the parking platform area comprises a plurality of first steel frames, a plurality of steel bars and a first concrete cushion layer; the first steel frame is a steel frame with an I-shaped section, the top of the first steel frame is of an arc structure, and the bottom of the first steel frame is of a straight structure; the first steel frames are arranged in parallel, and adjacent first steel frames are welded in a staggered mode through steel bars; the bottom of first steelframe is inlayed and is located first concrete cushion, and first concrete cushion surface constitutes parking platform.
Preferably, the distance from the parking platform to the top of the first steel frame is greater than the maximum height of the shield parts, and the width of the first steel frame is greater than the maximum width of the shield parts.
Preferably, the inverted arch-shaped area comprises a plurality of second steel frames, a plurality of steel bars, a second concrete cushion, a plurality of elastic gaskets and a plurality of steel plate bolts; the second steel frame is a steel frame with an I-shaped section, and the top and the bottom of the second steel frame are both arc-shaped structures; the second steel frames are arranged in parallel, and adjacent second steel frames are welded in a staggered mode through reinforcing steel bars; the bottom of the second steel frame is embedded in a second concrete cushion layer, the middle of the surface of the second concrete cushion layer is of an inverted bottom arch structure which is concave close to the bottom of the second steel frame, and two sides of the surface of the second concrete cushion layer are of horizontal structures; the elastic gaskets are symmetrically embedded in the inverted arch structure of the second concrete cushion layer and used for supporting the shield tunneling machine; the steel plate bolts are embedded in the horizontal structure of the second concrete cushion layer and used for supporting the trackless rubber-tyred vehicle to move in the inverted arch area, and the horizontal structure of the second concrete cushion layer is lower than the parking platform.
Preferably, the included angle of the circle centers of the inverted bottom arches of the inverted bottom arch structure in the second concrete cushion layer is 70 degrees.
Preferably, the height of the bottom of the dismantling chamber transportation channel is greater than or equal to the height of the parking platform, and the height and the width of the channel of the dismantling chamber transportation channel are both greater than the maximum height and the maximum width of the shield parts; when the height difference exists between the bottom of the disassembled chamber transportation channel and the parking platform, the inclination slope of the disassembled chamber transportation channel is not more than 6 degrees.
Preferably, the dismantling chamber transportation channel is vertically communicated with the auxiliary transportation roadway, a T-shaped opening is formed at the joint, and the two side walls of the T-shaped opening are in smooth transition; and a plurality of anchor cables and a plurality of supports are arranged in the auxiliary transportation roadway, and the anchor cables are fixedly connected with the supports and used for reinforcing the fixation of the supports in the auxiliary transportation roadway.
Preferably, the elevation of the bottom of the disassembled chamber transportation channel is consistent with that of the auxiliary transportation roadway, and the gradient of flowing water is 3 per mill.
Preferably, the height of the bottom of the inverted arch area is lower than the height of the bottom of the slant well bore.
Preferably, the parking platform region is further provided with a first drainage ditch at the bottom, and the inverted arch region is further provided with a second drainage ditch at the bottom.
The utility model has the advantages that: be different from prior art's condition, the utility model provides a colliery inclined shaft is shield structure normal position in pit and is disassembled chamber, through inclined shaft pit shaft, disassemble the chamber, disassemble the reasonable setting of chamber transportation passageway and auxiliary transport tunnel, is showing the intensity that has strengthened the normal position shield structure and has disassembled the chamber, has promoted the security that the shield structure was disassembled.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic top view of an embodiment of the underground shield in-situ dismantling chamber of the inclined shaft of the middle coal mine of the present invention;
FIG. 2 is a schematic structural view of an embodiment of the underground shield in-situ disassembly chamber of the inclined shaft of the middle coal mine;
FIG. 3 is a cross-sectional view taken along A-A of FIG. 1;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 1;
FIG. 5 is a schematic view of the structure at the tee in FIG. 1;
FIG. 6 is a schematic top view of the steel frame in the parking platform area of FIG. 1;
in the figure: 1-inclined shaft, 2-dismantling chamber, 21-parking platform area, 211-first steel frame, 212-steel bar, 213-first concrete cushion layer, 214-parking platform, 215-first drainage ditch, 22-inverted arch area, 221-second steel frame, 222-second concrete cushion layer, 223-elastic gasket, 224-steel plate bolt, 225-inverted bottom arch structure, 226-second drainage ditch, 3-dismantling chamber transportation channel, 4-auxiliary transportation roadway, 41-T-shaped port and 42-anchor cable.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1 and 2, the underground shield in-situ dismantling chamber of the inclined shaft of the coal mine of the utility model comprises an inclined shaft 1, a dismantling chamber 2, a dismantling chamber transport channel 3 and an auxiliary transport roadway 4 which are sequentially communicated; the disassembled chamber 2 and the disassembled chamber transportation channel 3 are both of channel structures with arc-shaped tops, and the channel height of the disassembled chamber 2 is larger than that of the disassembled chamber transportation channel 3; the dismantling chamber 2 comprises a parking platform area 21 and an anti-arch area 22 which are communicated, the parking platform area 21 is arranged on one side close to the dismantling chamber transportation channel 3, the anti-arch area 22 is arranged on one side of the inclined shaft 1, and the bottom height of the parking platform area 21 is higher than that of the anti-arch area 22. The following describes each component of the underground shield in-situ disassembly chamber of the inclined shaft of the coal mine in detail respectively.
Specifically, referring to fig. 3, the parking platform area 21 includes a plurality of first steel frames 211, a plurality of steel bars 212, a first concrete pad 213, and a first drainage channel 215; the first steel frame 211 is a steel frame with an I-shaped cross section, the top of the first steel frame 211 is of an arc structure, and the bottom of the first steel frame 211 is of a straight structure; the first steel frames 211 are arranged in parallel, and the adjacent first steel frames 211 are welded in a staggered manner through the steel bars 212, as shown in fig. 6; the bottom of the first steel frame 211 is embedded in the first concrete cushion 213, the surface of the first concrete cushion 213 forms a parking platform 214, and one side of the surface of the first concrete cushion 213 is provided with a first drainage channel 215 for drainage.
In this embodiment, the distance from the parking platform 214 to the top of the first steel frame 211 is greater than the maximum height of the shield parts, and the width of the first steel frame 211 is greater than the maximum width of the shield parts; the length of the parking platform is at least 5 m; the bottom of the parking platform 214 is higher than the bottom of the inverted arch area 22 and no water grade is provided at the bottom of the parking platform.
Specifically, referring to fig. 4, the inverted arch area 22 includes a plurality of second steel frames 221, a plurality of steel bars 212, a second concrete pad 222, a plurality of elastic spacers 223, a plurality of steel plate bolts 224, and a second drainage ditch 226; the second steel frame 221 is a steel frame with an i-shaped cross section, and the top and the bottom of the second steel frame 221 are both arc-shaped structures; the plurality of second steel frames 221 are arranged in parallel, and the adjacent second steel frames 221 are welded in a staggered manner through the steel bars 212, and the structure of the steel frame is similar to that of fig. 6; the bottom of the second steel frame 221 is embedded in a second concrete cushion 222, the middle of the surface of the second concrete cushion 222 is an inverted bottom arch structure 225 which is concave near the bottom of the second steel frame 221, and two sides of the surface of the second concrete cushion 222 are horizontal structures; a plurality of elastic gaskets 223 are symmetrically embedded at the inverted bottom arch structure of the second concrete cushion 222 and used for supporting the shield tunneling machine; a plurality of steel plate bolts 224 are embedded in the horizontal structure of the second concrete cushion 222 and used for supporting the trackless rubber-tyred vehicle to move in the inverted arch area 22, and the horizontal structure height of the second concrete cushion 222 is lower than that of the parking platform 214; a second drainage ditch 226 is provided on one side of the surface of the second concrete mat 222 to drain water.
In this embodiment, the included angle between the centers of the inverted arches of the inverted arch structure 225 in the second concrete cushion 222 is preferably 70 °; symmetrically arranging elastic gaskets 223 and steel plate bolts 224 by taking the center line of the section of the roadway as a reference, wherein each group is provided with 2 elastic gaskets, and each group is provided with one group at every 2 m; the bottom of the inverted arch area 22 is an inverted bottom arch structure 225 which facilitates storage of the shield machine and has superior effectiveness in resisting mine pressure. In other embodiments, the design parameters may be adaptively adjusted according to actual requirements, which is not limited herein.
Specifically, the bottom height of the disassembled chamber transportation channel 3 is greater than or equal to the height of the parking platform 214, and the channel height and width of the disassembled chamber transportation channel 3 are both greater than the maximum height and width of the shield parts; when the height difference exists between the bottom of the disassembled chamber transportation channel 3 and the parking platform 214, the inclination of the disassembled chamber transportation channel 3 is not more than 6 degrees; the bottom elevation of the disassembled chamber transportation channel 3 is consistent with the bottom elevation of the auxiliary transportation roadway 4, and the flowing water gradient is 3 per mill. In other embodiments, the design parameters may be adaptively adjusted according to actual requirements, which is not limited herein.
Specifically, referring to fig. 5, the disassembled chamber transportation channel 3 is vertically communicated with the auxiliary transportation roadway 4, a T-shaped opening 41 is formed at the joint, and two side walls of the T-shaped opening 41 are in smooth transition; a plurality of anchor cables 42 and a plurality of supports (not shown) are arranged in the auxiliary transportation roadway 4, and the anchor cables 42 are fixedly connected with the supports for enhancing the fixing strength of the supports in the auxiliary transportation roadway.
In the present embodiment, the height of the bottom of the inverted arch area 22 is lower than that of the inclined shaft 1, and specifically, the height of the bottom of the inverted arch area 22 is at least 200mm lower than that of the inclined shaft 1.
In the embodiment, the parking platform area 21 and the inverted arch area 22 both adopt double-layer anchor nets and are matched with the modes of anchor rope reinforcement and I-shaped steel frame support, and the design mode of cushion concrete and I-shaped steel frame support is adopted at the bottom; connecting the I-shaped steel frames together by using steel bars along the advancing direction of the disassembly chamber 2 to form a combined support; each steel frame unit is formed by welding I-steel and connecting steel plates, adjacent steel frame units are connected by bolts, the steel frame is suitable for on-site prefabrication, welding seams at joints are strictly performed according to related requirements of the steel structure, the height of the welding seams is not less than 6mm, and the stability of the steel frame structure is ensured; the steel frame is positioned by combining the anchor rod of the system, the steel frame and the primary sprayed concrete are required to be in close contact, and the gap is wedged tightly by applying a concrete cushion block; the size and the number of the steel frames are calculated according to the central line, construction errors and reserved deformation are considered during calculation, parameter design can be carried out according to actual conditions, and limitation is not carried out. The position of the end wall of the in-situ disassembly chamber is arranged by double I-shaped steels, and the double I-shaped steels are bound by steel wires when arranged side by side.
In addition, in the embodiment, after the shield is disassembled in situ and transported out, the bottom of the disassembled chamber 2 and the bottom of the disassembled chamber transport channel 3 are rebuilt to the road surface elevation in the operation period; the gradient of the flowing water is 3 per mill, and the flowing water flows into the auxiliary transportation roadway 4 from the disassembly chamber 2 through the disassembly chamber transportation channel 3.
Be different from prior art's condition, the utility model provides a colliery inclined shaft is shield structure normal position in pit and is disassembled chamber, through inclined shaft pit shaft, disassemble the chamber, disassemble the reasonable setting of chamber transportation passageway and auxiliary transport tunnel, is showing the intensity that has strengthened the normal position shield structure and has disassembled the chamber, has promoted the security that the shield structure was disassembled.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present application and are presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The underground shield in-situ disassembly chamber for the inclined shaft of the coal mine is characterized by comprising an inclined shaft, a disassembly chamber transportation channel and an auxiliary transportation roadway which are sequentially communicated;
the disassembly chamber and the disassembly chamber transportation channel are both of channel structures with arc-shaped tops, and the channel height of the disassembly chamber is larger than that of the disassembly chamber transportation channel;
the disassembly chamber comprises a parking platform area and an inverted arch area which are communicated, the parking platform area is arranged close to one side of a transportation channel of the disassembly chamber, the inverted arch area is arranged on one side of an inclined shaft, and the bottom height of the parking platform area is higher than that of the inverted arch area.
2. The coal mine inclined shaft underground shield in-situ disassembly chamber of claim 1, wherein the parking platform zone comprises a plurality of first steel frames, a plurality of steel bars, and a first concrete cushion;
the first steel frame is a steel frame with an I-shaped section, the top of the first steel frame is of an arc structure, and the bottom of the first steel frame is of a straight structure;
the first steel frames are arranged in parallel, and adjacent first steel frames are welded in a staggered mode through the steel bars;
the bottom of the first steel frame is embedded in the first concrete cushion layer, and the surface of the first concrete cushion layer forms a parking platform.
3. The coal mine slant well downhole shield in-situ disassembly chamber of claim 2, wherein the parking platform is spaced from the top of the first steel frame by a distance greater than the maximum height of the shield components, and the first steel frame has a width greater than the maximum width of the shield components.
4. The coal mine inclined shaft underground shield in-situ disassembly chamber of claim 2, wherein the inverted arch area comprises a plurality of second steel frames, a plurality of reinforcing steel bars, a second concrete cushion, a plurality of elastic gaskets and a plurality of steel plate bolts;
the second steel frame is a steel frame with an I-shaped section, and the top and the bottom of the second steel frame are both arc-shaped structures;
the second steel frames are arranged in parallel, and adjacent second steel frames are welded in a staggered mode through the steel bars;
the bottom of the second steel frame is embedded in the second concrete cushion, the middle of the surface of the second concrete cushion is of an inverted bottom arch structure which is concave close to the bottom of the second steel frame, and two sides of the surface of the second concrete cushion are of horizontal structures;
the elastic gaskets are symmetrically embedded in the inverted arch structure of the second concrete cushion layer and used for supporting the shield tunneling machine;
the steel plate bolts are embedded in the horizontal structure of the second concrete cushion layer and used for supporting the trackless rubber-tyred vehicle to move in the inverted arch area, and the horizontal structure of the second concrete cushion layer is lower than the parking platform.
5. The underground shield in-situ disassembly chamber for the inclined coal mine shaft as claimed in claim 4, wherein the included angle between the centers of the inverted arches of the inverted arch structure in the second concrete cushion is 70 °.
6. The coal mine inclined shaft underground shield in-situ disassembly chamber as claimed in claim 2, wherein the height of the bottom of the disassembly chamber transportation channel is greater than or equal to the height of the parking platform, and the height and width of the disassembly chamber transportation channel are both greater than the maximum height and width of shield parts;
when the height difference exists between the bottom of the disassembled chamber transportation channel and the parking platform, the inclination slope of the disassembled chamber transportation channel is not more than 6 degrees.
7. The coal mine inclined shaft underground shield in-situ disassembly chamber as claimed in claim 6, wherein the disassembly chamber transportation channel is vertically communicated with an auxiliary transportation roadway, a T-shaped port is formed at the joint, and two side walls of the T-shaped port are in smooth transition;
and a plurality of anchor cables and a plurality of supports are arranged in the auxiliary transportation roadway, and the anchor cables are fixedly connected with the supports and used for reinforcing the fixation of the supports in the auxiliary transportation roadway.
8. The underground shield in-situ dismantling chamber for coal mine inclined shaft according to claim 7, characterized in that the elevation of the bottom of the transportation channel of the dismantling chamber is consistent with the elevation of the bottom of the auxiliary transportation roadway, and the gradient of flowing water is 3 per mill.
9. The coal mine slant well downhole shield in situ disassembly chamber of claim 1, wherein the height of the base of said inverted arch area is lower than the height of the base of said slant well bore.
10. The coal mine slant well downhole shield in situ disassembly chamber of claim 1, wherein the parking platform zone further comprises a first drain at the bottom thereof, and the inverted arch zone further comprises a second drain at the bottom thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123442065.6U CN217107024U (en) | 2021-12-30 | 2021-12-30 | Underground shield in-situ disassembly chamber for coal mine inclined shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123442065.6U CN217107024U (en) | 2021-12-30 | 2021-12-30 | Underground shield in-situ disassembly chamber for coal mine inclined shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217107024U true CN217107024U (en) | 2022-08-02 |
Family
ID=82593373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123442065.6U Active CN217107024U (en) | 2021-12-30 | 2021-12-30 | Underground shield in-situ disassembly chamber for coal mine inclined shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217107024U (en) |
-
2021
- 2021-12-30 CN CN202123442065.6U patent/CN217107024U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112627234B (en) | Underground comprehensive pipe gallery construction equipment and method | |
| CN112160759A (en) | Method for starting and trial tunneling of tunnel shield crossing river | |
| CN109139049B (en) | Construction method for secondary lining buckling arch of underground excavation station of subway | |
| CN113062354A (en) | Assembly method for prefabricated subway station of open-cut pile support system | |
| CN107246016A (en) | A kind of suspension type inner support system and foundation ditch construction method suitable for base pit engineering | |
| CN107542096A (en) | The supporting construction of dam body between a kind of Adjacent Pit | |
| CN217107024U (en) | Underground shield in-situ disassembly chamber for coal mine inclined shaft | |
| CN207092108U (en) | A kind of suspension type inner support system suitable for base pit engineering | |
| CN110080787B (en) | Construction method for in-station stacked shield station-crossing structural type of underground excavation station | |
| CN107268352A (en) | Refoot the fixed track usage plan device of operation for tunnel | |
| CN212614740U (en) | Hole internal reinforcement structure of existing shield tunnel is striden on closely | |
| CN214573260U (en) | Interim river steel landing stage of striding of construction | |
| CN213684135U (en) | Tunnel pavement longitudinal crack reinforcing and processing structure | |
| CN110230238B (en) | Railway line protection device and protection method | |
| CN104234734A (en) | Novel air crossing construction method of deep mine and highland pressure impact coal seam | |
| CN111172819B (en) | Platform for assembling and walking shield trailer and construction method thereof | |
| CN210561510U (en) | Railway line protection device | |
| CN106437780A (en) | Combined structure of reinforced concrete reverse arch and anchor rods and for managing roadway bottom swelling and construction method of combined structure | |
| CN207278269U (en) | A kind of combination moving type construction operation platform for mining sectbn | |
| CN111648795A (en) | Underground chamber supporting structure and underground chamber | |
| CN111322093A (en) | Deep soft rock roadway anchoring-U-shaped steel support-after-frame filling cooperative control method | |
| CN114109392B (en) | Wide-digging narrow-charging type digging method for stoping roadway | |
| CN218971218U (en) | Large-section underground excavation tunnel arch portion reinforcing steel bar collapse prevention structure | |
| CN111236242B (en) | Antitorque foundation ditch of bailey beam excavates platform under water | |
| CN216077140U (en) | A rack device for secretly dig tunnel lining |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |