CN112412502A - Excavation method for one-step blasting forming of cave depot tank body - Google Patents
Excavation method for one-step blasting forming of cave depot tank body Download PDFInfo
- Publication number
- CN112412502A CN112412502A CN202011488432.3A CN202011488432A CN112412502A CN 112412502 A CN112412502 A CN 112412502A CN 202011488432 A CN202011488432 A CN 202011488432A CN 112412502 A CN112412502 A CN 112412502A
- Authority
- CN
- China
- Prior art keywords
- tank body
- blasting
- excavation
- dome
- excavation method
- 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.)
- Pending
Links
- 238000009412 basement excavation Methods 0.000 title claims abstract description 75
- 238000005422 blasting Methods 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000010276 construction Methods 0.000 claims abstract description 37
- 238000005553 drilling Methods 0.000 claims abstract description 8
- 238000000465 moulding Methods 0.000 claims abstract description 8
- 239000002893 slag Substances 0.000 claims abstract description 6
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 239000011435 rock Substances 0.000 claims description 10
- 239000011378 shotcrete Substances 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 239000004567 concrete Substances 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 3
- 230000000717 retained effect Effects 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 2
- 230000008520 organization Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000000638 solvent extraction Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D13/00—Large underground chambers; Methods or apparatus for making them
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/16—Modification of mine passages or chambers for storage purposes, especially for liquids or gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Engineering & Computer Science (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention provides an excavation method for one-time blasting molding of a cave depot tank body, which comprises the following steps: step S1, excavating a lower channel of the tank body at the lower part of the tank body, wherein the lower channel is positioned at the bottom of the tank body and extends to the center of the tank body along the radial direction of the tank body; step S2, in the center of the tank body, taking the part of the top surface of the lower channel positioned in the center of the tank body as a working surface, and excavating a vertical shaft from bottom to top, wherein the vertical shaft penetrates through the tank body and a dome above the tank body; step S3, excavating an upper channel of the tank body and a dome above the tank body on the upper part of the tank body; step S4, digging a tank body by taking the bottom of the dome as a working surface, and drilling a plurality of blast holes at the periphery of the vertical shaft for blasting; and S5, cleaning slag, repeating the step S4 by taking the shaft blasted in the step S4 as the center until the tank body is excavated, and finally supporting the tank body. The method fully combines the one-time pore-forming blasting excavation of each working face, improves the construction efficiency and accelerates the construction progress.
Description
Technical Field
The invention belongs to the technical field of cave depot tank body excavation, and particularly relates to an excavation method for one-time blasting forming of cave depot tank bodies.
Background
With the rapid development of economy in China, the construction pace of infrastructure is accelerated, the development and utilization of underground space are increased, and the construction of underground cave depots is also a part of the development and utilization of the underground space and is often used as reserve resources. The method has the characteristics of large span, large volume, complex structural profile and the like, brings huge challenges to construction, and can cause the increase of construction cost, the delay of construction period and the potential safety hazard in the construction process if the construction method is unreasonable. Meanwhile, the underground cave depot has complex outline and large tank body excavation section, and the conventional construction method has complex construction procedures and difficult construction organization optimization and is difficult to adapt to the rapid excavation and construction safety of the tank body. Therefore, a safe and efficient construction method is needed to solve the problems existing in the construction of the large underground cave depot tank body, and the prior art is improved.
Therefore, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
The invention aims to provide an excavation method for one-time blasting forming of a cave depot tank body, which at least solves the problems that the existing construction process is complex, the construction organization is difficult to optimize, the rapid excavation and construction safety of the tank body are difficult to adapt, and the like.
In order to achieve the above purpose, the invention provides the following technical scheme:
an excavation method for one-time blasting forming of cave depot tanks comprises the following steps:
step S1, excavating a lower channel of the tank body at the lower part of the tank body, wherein the lower channel is positioned at the bottom of the tank body and extends to the center of the tank body along the radial direction of the tank body;
step S2, digging a vertical shaft from bottom to top at the center of the tank body by taking the part of the top surface of the lower channel positioned at the center of the tank body as a working surface, wherein the vertical shaft penetrates through the tank body and a dome above the tank body;
step S3, excavating an upper channel of the tank body and a dome above the tank body on the upper part of the tank body;
step S4, digging a tank body by taking the bottom of the dome as a working surface, and drilling a plurality of blast holes at the periphery of the vertical shaft for blasting;
and S5, cleaning the blasted slag, repeating the step S4 by taking the shaft blasted in the step S4 as the center until the tank body is excavated, and finally supporting the tank body.
In the excavation method for one-shot blasting forming of the cavern tank body, preferably, the step S3 specifically includes the following steps:
step S301, excavating an upper channel of the tank body and a dome above the tank body;
step S302, drilling a circle of pre-splitting holes at the bottom of the dome and the outline of the tank body, and charging the pre-splitting holes to perform pre-splitting blasting on the tank body.
In the excavation method for one-time blasting molding of the cavern tank body, preferably, in the step S301, the bottom of the dome is used as a working surface, a circle of annular groove is excavated at the bottom of the dome along the profile of the tank body, and the groove is used as a working space of a down-the-hole drill;
preferably, the cross-sectional dimension of the groove is 3m wide by 3m deep.
In the excavation method for one-time explosion forming of the cavern tank body, preferably, in the step S302, a pre-split hole is drilled along the profile of the tank body by using a down-the-hole drill with the bottom of the groove as a working surface, and the pre-split explosion of the tank body is performed by charging powder into the pre-split hole.
In the excavation method for once blasting forming of the cavern tank body, preferably, a slope is arranged at the bottom of a communication part between the upper channel and the dome, the slope is used as a slope for transitional connection between the bottom surface of the dome and the upper channel, and the slope is reserved as a construction connection channel when the tank body is excavated; and finally excavating rock mass below the slope way.
In the excavation method of one-shot blasting forming of the cavern tank as described above, preferably, in step S3, the ramp is retained when the groove is excavated along the contour of the tank.
In the excavation method of the cavern tank body through one-time blasting forming, preferably, in the step S1, in the process of excavating the lower channel to the center of the tank body, the excavation is carried out while supporting is carried out;
preferably, each excavation is made to a depth of 2.5-3 m.
According to the excavation method for one-time blasting forming of the cave depot tank body, preferably, in the lower channel excavation and supporting process, the mesh-sprayed concrete is adopted for supporting, and an anchor rod is arranged according to the actual situation of surrounding rock;
preferably, the thickness of the net-sprayed concrete ranges from 8cm to 12cm, and the concrete is C25 concrete.
In the excavation method for one-time blasting molding of the cavern tank body, preferably, the diameter range of the pre-split holes is 85-95mm, and the distance range between the pre-split holes is 600-700 mm.
According to the excavation method for one-time blasting molding of the cave depot tank body, preferably, a plurality of blast holes are drilled and blasted successively on the periphery of the vertical shaft;
preferably, the plurality of blast holes of each blasting are adjacent blast holes of two adjacent circles;
preferably, the number of blast holes drilled each time is 4-8, the distance between two adjacent blast holes in the same circle of blast holes is 1m-1.5m, and the distance between two adjacent circles of blast holes is 1m-1.5 m.
Compared with the closest prior art, the technical scheme provided by the invention has the following excellent effects:
1. the excavation method for one-time blasting forming of the cave depot tank body is suitable for excavating the cylinder super-large section tank body, fully combines one-time pore-forming blasting excavation of each working face, improves construction efficiency and accelerates construction progress.
2. The excavation method adopts presplitting blasting to the tank body contour line to buffer and reflect the vibration wave of the excavation blasting, controls the damage influence of the tank body contour line on the reserved rock mass, reduces the damage influence on the tank body wall during blasting construction, ensures that a smoother excavation contour is obtained, is favorable for the stability of the tank body wall, and ensures the safety of construction and later use.
3. The excavation method has the advantages of few excavation steps, reasonable tank body excavation partitioning, reduction of construction organization difficulty, large excavation working surface and contribution to mechanical construction.
Drawings
FIG. 1 is a longitudinal sectional view of a cavern tank excavation according to an embodiment of the invention;
FIG. 2 is a cross-sectional view of the bottom of a tank excavated from a cavern tank in accordance with an embodiment of the present invention;
FIG. 3 is a cross-sectional view of the bottom of a dome for a cavern tank excavation according to an embodiment of the invention.
In the figure: 1. a lower channel; 2. a shaft; 3. a groove; 4. the outline of the tank body; 5. a tank body; 6. a dome; 7. a ramp; 8. an upper channel; 9. pre-cracking holes; 10. and (5) blast holes.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are for convenience of description of the present invention only and do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "connected" and "connected" used herein should be interpreted broadly, and may include, for example, a fixed connection or a detachable connection; they may be directly connected or indirectly connected through intermediate members, and specific meanings of the above terms will be understood by those skilled in the art as appropriate.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
According to an embodiment of the present invention, as shown in fig. 1 to 3, the present invention provides an excavation method for one-shot blasting forming of a cavern tank, the excavation method includes the following steps:
step S1, excavating a lower channel 1 of the tank body 5 at the lower part of the tank body 5, wherein the lower channel 1 is positioned at the bottom of the tank body 5, the cross section of the lower channel 1 is rectangular, the lower channel 1 extends along the radial direction of the tank body 5, and the lower channel 1 extends from the outer part of the tank body 5 to the center of the tank body 5; firstly, a lower channel 1 is excavated at the bottom of the tank body 5, and the lower channel 1 is used as a foundation for excavating a vertical shaft 2 in the next step.
Step S2, in the center of the tank body 5, the part of the top surface of the lower channel 1, which is positioned in the center of the tank body 5, is used as a working surface, a vertical shaft 2 is excavated from bottom to top, the size length and the width of the cross section of the vertical shaft are 3m multiplied by 3m, and the vertical shaft 2 penetrates through the tank body 5 and is communicated with a dome 6 above the tank body 5. The shaft 2 is excavated upwards from the lower shaft 1, and the slag in the shaft 2 can be discharged through the lower shaft 1. Set up shaft 2 and can increase in 5 country rocks of jar body and face the free face, reach best blasting effect, can improve the blasting efficiency of jar body 5, improve jar body 5 excavation construction progress.
And step S3, excavating the upper channel 8 and the dome 6, and performing presplitting blasting on the tank body 5. The upper channel 8 is positioned at the top of the dome 6, the upper channel 8 is communicated with the dome 6, and the bottom surface of the upper channel 8 is connected with the bottom surface of the dome 6 through a transition ramp 7.
Specifically, the method comprises the following steps: step S301, an upper channel 8 of the tank body 5 and a dome 6 above the tank body 5 are excavated above the tank body 5, so that a construction space is provided for drilling and blasting of the tank body 5, the dome 6 is excavated in advance, the excavation of the dome 6 and the excavation of the tank body 5 are separately carried out, and the dome 6 and the excavation of the tank body 5 can be guaranteed not to be mutually influenced.
In the embodiment of the present invention, step S301 is to excavate a ring of annular groove 3 along the tank profile 4 at the bottom of the dome 6 with the bottom of the dome 6 as the working surface, where the groove has a size of 3m wide by 3m deep, and the groove 3 is used as the working space of the down-the-hole drill. The groove 3 is constructed on the dome 6, so that the operation space of the down-the-hole drill is increased, the groove 3 is also used as a pre-crack groove for blasting the tank body 5, and the tank body 5 can obtain a relatively flat excavation profile. In this embodiment the recess 3 is provided to provide space for down-the-hole drill to be worked on, and in other embodiments the recess 3 may not be excavated when the space of the dome 6 is sufficient to accommodate down-the-hole drill work.
Step S302, a circle of pre-splitting holes 9 are drilled at the bottom of the dome 6 and the tank body outline 4, and the pre-splitting holes 9 are filled with medicine to perform pre-splitting blasting on the tank body 5. The presplitting blasting can buffer and reflect the vibration wave of the excavation blasting, and the damage influence of the blasting of the tank body 5 on the surrounding rock mass is controlled; and a smooth excavation profile can be obtained, thereby ensuring the excavation quality of the tank body 5.
In the embodiment of the present invention, step S302 is to drill the pre-split hole 9 along the peripheral contour of the can body 5 by using the down-the-hole drill with the bottom of the groove 3 as the working surface, and load the pre-split hole 9 to perform the pre-splitting blasting of the can body 5.
And step S4, the tank body 5 is excavated by taking the bottom of the dome 6 as a working surface, and a plurality of blast holes 10 are drilled in sequence around the vertical shaft 2 for blasting. The lower channel 1 is used as a main channel for excavating slag in each blasting.
Specifically, a plurality of blast holes 10 are drilled and blasted successively on the periphery of the vertical shaft 2, that is, the plurality of blast holes 10 are drilled around the vertical shaft 2, after the plurality of blast holes 10 are blasted, the plurality of blast holes 10 are drilled continuously around the blasted vertical shaft 2 for blasting, and the operation is circulated; until the blasting excavation of the tank body 5 is finished.
In the embodiment, the plurality of blast holes 10 of each blasting are adjacent blast holes of two adjacent circles; the number of blast holes drilled each time is 4-8, and the number of blast holes can be 4, 5, 6, 7 or 8. Taking 8 blast holes as an example, 4 blast holes are firstly drilled in the blast holes 10 at the inner ring surrounding the vertical shaft 2, then 4 blast holes are drilled at the outer ring adjacent to the inner ring, and the drilled 8 blast holes are adjacent. That is, when the tank body 5 is blasted, 8 adjacent blast holes are firstly selected to blast in two circles of blast holes close to the vertical shaft 2, the step is repeated until the two circles of blast holes close to the vertical shaft 2 are completely blasted, then 8 adjacent blast holes are selected to blast in two circles of blast holes (namely the vertical shaft 2 after the previous blasting) in the outer ring of the two circles of blast holes close to the vertical shaft 2, 8 blast holes are blasted each time until the two circles of blast holes are blasted, and 8 blast holes in the two circles of blast holes are selected each time to blast until the blasting excavation of the tank body 5 is finished.
4-8 blast holes are blasted each time, the tank body is blasted gradually, the blasting amount is controlled each time, the influence of blasting on the excavation of the cave depot is ensured to be minimum, the muck output of blasting each time is reasonable, and the transportation of muck after blasting is convenient.
In a specific embodiment of the present invention, in the same circle of blast holes 10, the circumferential distance range of two adjacent blast holes 10 is 1m to 1.5m, the distance between two adjacent blast holes 10 of the same circle can be selected from 1m, 1.1m, 1.2m, 1.3m, 1.4m and 1.5m, the radial distance range of two adjacent circles of blast holes 10 is 1m to 1.5m, and the distance between two adjacent circles of blast holes 10 can be selected from 1m, 1.1m, 1.2m, 1.3m, 1.4m and 1.5 m. In the embodiment, the distance between two adjacent blast holes 10 in the same circle is 1.2m, and the distance between two adjacent circles of blast holes 10 is 1.2 m.
And S5, cleaning the blasted slag, repeating the step S4 by taking the shaft 2 blasted in the step S4 as the center until the excavation of the tank body 5 is finished, and finally supporting the tank body 5. And drilling a circle of blast holes 10 around the vertical shaft 2 for blasting, so as to further enlarge the transverse area of the vertical shaft 2, then continuously drilling and blasting around the blasted vertical shaft 2, repeating the steps until the whole tank body 5 is completely excavated, and blasting circle by taking the vertical shaft 2 as a center by setting the vertical shaft 2, so that the blasting efficiency is improved, and the tank body 5 can be quickly excavated.
In the embodiment of the invention, the slope 7 is arranged at the bottom of the communication part between the upper channel 8 and the dome 6, the slope 7 is used for a slope in transition connection between the bottom surface of the dome 6 and the upper channel 8, and the slope 7 is reserved when the tank body 5 is excavated. The rock mass below the ramp 7 is excavated last. The ramp 7 serves as a construction connecting channel, and the ramp 7 is used for connecting the upper channel 8 with the dome 6, so that a tool for blasting construction can be transported to the dome 6 through the ramp 7.
In the embodiment of the invention, the ramp 7 is retained when the groove 3 is cut along the contour of the tank 5.
In the specific embodiment of the invention, in the process of excavating the lower channel 1 to the center of the tank body 5, the lower channel is excavated and supported at the same time; the excavation footage is 2.5-3m each time, and the excavation footage can be selected from 2.5m, 2.6m, 2.7m, 2.9m, 3m and the like. And after each excavation footage is finished, the lower channel 1 is supported, so that the lower channel 1 has enough strength, and the influence of subsequent blasting operation on the lower access road is reduced as much as possible.
In the specific embodiment of the invention, a net-sprayed concrete support is adopted, and an anchor rod is arranged according to the actual situation of surrounding rocks; the thickness range of the net sprayed concrete is 8-12cm, the thickness of the net sprayed concrete can be 8cm, 8.5cm, 9cm, 10cm, 11cm, 12cm and the like, and the concrete is C25 concrete. The net-sprayed concrete is adopted for single-layer supporting, and anchor rods can be arranged at the places with larger stress on surrounding rocks of the lower channel 1, so that the supporting strength is further improved, the lower channel 1 cannot deform, and the safe use of the lower channel 1 is ensured. The excavation process is strengthened monitoring jar body 5, guarantees construction safety.
In the specific embodiment of the invention, the diameter range of the pre-splitting holes 9 is 85-95mm, the diameter of the pre-splitting holes 9 can be 85mm, 86mm, 90mm, 94mm, 95mm and the like, the distance between the pre-splitting holes 9 ranges from 600mm to 700mm, and the distance between the pre-splitting holes 9 can take 600mm, 610mm, 650mm, 690mm, 700mm and the like.
In summary, according to the excavation method for one-time blasting forming of the cavern tank body provided by the invention, the upper channel, the lower channel and the dome are excavated, the slope way of the upper channel is reserved to be used as the construction connecting channel, the bottom surface of the dome is used as the working surface for further excavation of the tank body, and one-time hole-forming blasting excavation of each working surface is fully combined, so that the construction efficiency is improved, and the construction progress is accelerated. The tank body contour line is subjected to presplitting blasting by the excavation method, a relatively flat excavation contour line can be obtained, the stability of the tank body wall is facilitated, and the safety of construction and later-stage use is ensured. The excavation method has the advantages of few excavation steps, reasonable tank body excavation partitioning, reduction of construction organization difficulty, large excavation working surface and contribution to mechanical construction.
The above description is only exemplary of the invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made within the spirit and principle of the invention is intended to be covered by the appended claims.
Claims (10)
1. The excavation method for one-time blasting forming of the cave depot tank body is characterized by comprising the following steps of:
step S1, excavating a lower channel of the tank body at the lower part of the tank body, wherein the lower channel is positioned at the bottom of the tank body and extends to the center of the tank body along the radial direction of the tank body;
step S2, digging a vertical shaft from bottom to top at the center of the tank body by taking the part of the top surface of the lower channel positioned at the center of the tank body as a working surface, wherein the vertical shaft penetrates through the tank body and a dome above the tank body;
step S3, excavating an upper channel of the tank body and a dome above the tank body on the upper part of the tank body;
step S4, digging a tank body by taking the bottom of the dome as a working surface, and drilling a plurality of blast holes at the periphery of the vertical shaft for blasting;
and S5, cleaning the blasted slag, repeating the step S4 by taking the shaft blasted in the step S4 as the center until the tank body is excavated, and finally supporting the tank body.
2. The excavation method for one-time blasting forming of the cavern tank body as claimed in claim 1, wherein the step S3 specifically comprises the following steps:
step S301, excavating an upper channel of the tank body and a dome above the tank body;
step S302, drilling a circle of pre-splitting holes at the bottom of the dome and the outline of the tank body, and charging the pre-splitting holes to perform pre-splitting blasting on the tank body.
3. The excavation method for one-time blasting forming of the cavern tank body as claimed in claim 2, wherein in the step S301, a ring-shaped groove is excavated along the tank body profile at the bottom of the dome by taking the bottom of the dome as a working surface, and the groove is taken as a working space of a down-the-hole drill;
preferably, the cross-sectional dimension of the groove is 3m wide by 3m deep.
4. The excavation method for one-shot blasting forming of the cavern tank body as claimed in claim 3, wherein in the step S302, a pre-cracked hole is drilled along the profile of the tank body by using a down-the-hole drill with the bottom of the groove as a working surface, and the pre-cracked hole is charged with powder to perform pre-cracked blasting of the tank body.
5. The excavation method for the once blasting forming of the cave depot tank body according to the claim 3, wherein a slope way is arranged at the bottom of the communication part between the upper channel and the dome, the slope way is used for a slope way in transition connection between the bottom surface of the dome and the upper channel, and the slope way is reserved to be used as a construction connection channel when the tank body is excavated; and finally excavating rock mass below the slope way.
6. The excavation method by one-shot blasting molding of the cavern tank as claimed in claim 5, wherein in step S3, the ramp is retained when the groove is excavated along the contour of the tank.
7. The excavation method by one shot blasting molding of the cavern tank as claimed in any one of claims 1 to 6, wherein in the step S1, during excavation of the lower channel to the center of the tank, support is performed while excavation is performed;
preferably, each excavation is made to a depth of 2.5-3 m.
8. The excavation method for the one-time blasting forming of the cave depot tank body according to the claim 7, characterized in that in the excavation and supporting process of the lower channel, a mesh-sprayed concrete support is adopted, and an anchor rod is arranged according to the actual situation of surrounding rocks;
preferably, the thickness of the net-sprayed concrete ranges from 8cm to 12cm, and the concrete is C25 concrete.
9. The excavation method for once blasting molding of the cavern tank body as claimed in claim 2, wherein the diameter range of the pre-split holes is 85-95mm, and the distance range between the pre-split holes is 600-700 mm.
10. The excavation method for the once blasting molding of the cavern tank body according to any one of claims 1 to 6, wherein a plurality of blast holes are drilled and blasted successively on the periphery of the vertical shaft;
preferably, the plurality of blast holes of each blasting are adjacent blast holes of two adjacent circles;
preferably, the number of blast holes drilled each time is 4-8, the distance between two adjacent blast holes in the same circle of blast holes is 1m-1.5m, and the distance between two adjacent circles of blast holes is 1m-1.5 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011488432.3A CN112412502A (en) | 2020-12-16 | 2020-12-16 | Excavation method for one-step blasting forming of cave depot tank body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011488432.3A CN112412502A (en) | 2020-12-16 | 2020-12-16 | Excavation method for one-step blasting forming of cave depot tank body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112412502A true CN112412502A (en) | 2021-02-26 |
Family
ID=74775986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011488432.3A Pending CN112412502A (en) | 2020-12-16 | 2020-12-16 | Excavation method for one-step blasting forming of cave depot tank body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112412502A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113389579A (en) * | 2021-07-30 | 2021-09-14 | 中铁十一局集团第五工程有限公司 | Excavation method of underground large-space vertical tank body |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0313696A (en) * | 1989-06-08 | 1991-01-22 | Fujita Corp | Construction method for underground cave |
| CN103174429A (en) * | 2013-03-01 | 2013-06-26 | 河海大学 | Underground cavity extra-large dome excavating construction method |
| CN103726858A (en) * | 2013-12-28 | 2014-04-16 | 中铁三局集团有限公司 | Underground large-scale cave depot project sphere-cylinder combination excavation method |
| CN106194223A (en) * | 2016-07-21 | 2016-12-07 | 中国水利水电第十四工程局有限公司 | The excavation method of large-scale down stream surge-chamber dome under a kind of complex geological condition |
| CN106285731A (en) * | 2016-08-05 | 2017-01-04 | 湖南科技大学 | The little courtyard radiant type of a kind of high Large chamber and the mixed construction method of step |
| CN107355228A (en) * | 2017-07-14 | 2017-11-17 | 徐州徐工基础工程机械有限公司 | A kind of hard rock tunnel construction equipment and construction method |
| CN107461205A (en) * | 2017-09-25 | 2017-12-12 | 中国华冶科工集团有限公司 | A kind of construction method for expanding brush day drop shaft |
| JP2019148070A (en) * | 2018-02-26 | 2019-09-05 | 鹿島建設株式会社 | Construction method of underground structure |
| CN111854553A (en) * | 2020-08-05 | 2020-10-30 | 重庆交通大学 | High-pressure water jet contour joint cutting auxiliary blasting method and contour joint cutting trolley |
| CN112065470A (en) * | 2020-09-23 | 2020-12-11 | 中铁四局集团有限公司 | Cave depot tank body excavation method |
-
2020
- 2020-12-16 CN CN202011488432.3A patent/CN112412502A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0313696A (en) * | 1989-06-08 | 1991-01-22 | Fujita Corp | Construction method for underground cave |
| CN103174429A (en) * | 2013-03-01 | 2013-06-26 | 河海大学 | Underground cavity extra-large dome excavating construction method |
| CN103726858A (en) * | 2013-12-28 | 2014-04-16 | 中铁三局集团有限公司 | Underground large-scale cave depot project sphere-cylinder combination excavation method |
| CN106194223A (en) * | 2016-07-21 | 2016-12-07 | 中国水利水电第十四工程局有限公司 | The excavation method of large-scale down stream surge-chamber dome under a kind of complex geological condition |
| CN106285731A (en) * | 2016-08-05 | 2017-01-04 | 湖南科技大学 | The little courtyard radiant type of a kind of high Large chamber and the mixed construction method of step |
| CN107355228A (en) * | 2017-07-14 | 2017-11-17 | 徐州徐工基础工程机械有限公司 | A kind of hard rock tunnel construction equipment and construction method |
| CN107461205A (en) * | 2017-09-25 | 2017-12-12 | 中国华冶科工集团有限公司 | A kind of construction method for expanding brush day drop shaft |
| JP2019148070A (en) * | 2018-02-26 | 2019-09-05 | 鹿島建設株式会社 | Construction method of underground structure |
| CN111854553A (en) * | 2020-08-05 | 2020-10-30 | 重庆交通大学 | High-pressure water jet contour joint cutting auxiliary blasting method and contour joint cutting trolley |
| CN112065470A (en) * | 2020-09-23 | 2020-12-11 | 中铁四局集团有限公司 | Cave depot tank body excavation method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113389579A (en) * | 2021-07-30 | 2021-09-14 | 中铁十一局集团第五工程有限公司 | Excavation method of underground large-space vertical tank body |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109339797B (en) | Extremely-small-clear-distance tunnel exit shock absorption construction method | |
| CN103174429B (en) | Underground cavity extra-large dome excavating construction method | |
| CN108871119B (en) | Tunnel hole distribution blasting method | |
| CN101963060B (en) | Tunnel construction method based on steel tube arch-rib supporting structure | |
| CN110879026B (en) | Excavation and cut blasting method suitable for high-plasticity low-strength rock tunnel | |
| CN112065470B (en) | Cave depot tank body excavation method | |
| CN104564085B (en) | Large section tunnel excavation comprehensive construction method under an ultra shallow underground layering part of city | |
| CN103726858A (en) | Underground large-scale cave depot project sphere-cylinder combination excavation method | |
| CN104613831A (en) | Construction method for additionally forming periphery auxiliary holes in periphery of vertical shaft periphery hole | |
| CN112412502A (en) | Excavation method for one-step blasting forming of cave depot tank body | |
| CN104654941B (en) | A kind of dam foundation Rapid Excavation explosive forming method based on explosives mix-load truck | |
| CN104819670A (en) | Pre-drilling mesopore shaft excavation blasting method | |
| CN109236320B (en) | Underground chamber construction method | |
| CN111023930B (en) | Tunnel step excavation method | |
| CN113107500B (en) | Variable cross-section tunnel construction method | |
| CN111043924A (en) | Efficient blasting method for blocking stemming of tunnel soft rock full-section multistage ultra-deep hole double-end stemming | |
| CN112504041B (en) | Method for reducing tunnel blasting excavation vibration speed in urban sensitive environment | |
| CN112432570B (en) | Controlled blasting construction method for vertical shaft wall beam nest | |
| CN215948182U (en) | Drill bit device combined with rotary spraying anchor cable construction process | |
| CN110820726A (en) | Pile foundation pore-forming method in environment where disturbance is not suitable for surrounding of hard rock in mountainous area | |
| CN111287783A (en) | Vault turning-folding-shaped discharge flue of single-hole double-track tunnel and construction method | |
| CN211950553U (en) | Vault zigzag-shaped discharge flue of single-hole double-track tunnel | |
| CN214062981U (en) | Laminated tunnel cave group excavation reinforcing system | |
| CN112964143A (en) | Three-time blasting method for hollow hole straight-hole cut | |
| CN112855176A (en) | Method for quickly excavating deep-excavation-side large-inclination-angle small-caliber tunnel anchor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |