CN108104153A - A kind of support construction and its construction method for conveyer - Google Patents

A kind of support construction and its construction method for conveyer Download PDF

Info

Publication number
CN108104153A
CN108104153A CN201711135522.2A CN201711135522A CN108104153A CN 108104153 A CN108104153 A CN 108104153A CN 201711135522 A CN201711135522 A CN 201711135522A CN 108104153 A CN108104153 A CN 108104153A
Authority
CN
China
Prior art keywords
support
conveyer
construction
dam
body base
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
Application number
CN201711135522.2A
Other languages
Chinese (zh)
Inventor
蒲廷现
张信
崔海波
何润林
廖吉星
杨龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guiyang Kailin Chemical Co Ltd
Original Assignee
Guiyang Kailin Chemical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Guiyang Kailin Chemical Co Ltd filed Critical Guiyang Kailin Chemical Co Ltd
Priority to CN201711135522.2A priority Critical patent/CN108104153A/en
Publication of CN108104153A publication Critical patent/CN108104153A/en
Pending legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00Foundations as substructures
    • E02D27/32Foundations for special purposes
    • E02D27/44Foundations for machines, engines or ordnance
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/18Making embankments, e.g. dikes, dams
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00Materials
    • E02D2300/0026Metals
    • E02D2300/0029Steel; Iron
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00Materials
    • E02D2300/0084Geogrids

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)

Abstract

The present invention provides a kind of support construction and its construction method for conveyer, the support construction for conveyer includes support dam and conveyer bearing support, the length direction on conveyer bearing support along support dam is arranged in the both sides in support dam crest face, it is respectively to fill the layer structure being integrated each other by multilayer dam body base and multilayer keel shoe to support dam, wherein at least there is the bottom that one layer of keel shoe is arranged in support dam;The construction method includes leveling construction site, is filled using geotechnological boom net as keel shoe and nearby using ardealite as dam body base material and the installation conveyer bearing support on support dam crest face the step of;Technical solution using the present invention, enhances support construction intensity, and installation is convenient, resource has been saved, has reduced the cost of support construction, support construction is made to be suitable for keeping stablizing in the presence of a harsh environment, reduce the injury to conveyer, reduce cost of equipment maintenance and security risk.

Description

A kind of support construction and its construction method for conveyer
Technical field
The invention belongs to production technical field more particularly to a kind of support constructions and its construction party for conveyer of digging up mine Method.
Background technology
With the continuous development of mining industry, the underground that deepens continuously of pit mining depth, in each operation mining area, extensively Using various giant mechanical and electrical equipment operations, the application of these large-scale mining equipment both alleviates labor intensity, also improves Mining efficiency, ribbon conveyer are also known as rubber conveyer, are a kind of common mining conveying equipments, have operation at a high speed, Steadily, low noise, and can be mainly used in conveying bulk material with fields such as climb and fall transmission, during mining, be Raising enterprise production yields, it usually needs bulk mineral products are conveyed to very long distance using ribbon conveyer, during this, The region route that conveyer is passed through is very long, frequently encounters the severe situation of various geological conditions, and for some with special The mineral resources of physicochemical properties, must be especially careful in conveying, for example, phosphogypsum dihydrate, opening phosphatization fertilizer with Kweiyang has Exemplified by limit company, the said firm is widely used at present phosphoric acid by wet process and is produced, and by-product therein is phosphogypsum dihydrate, main at present Band examination conveyer to be used to carry out conveying operation, the moisture for containing 20%-25% through extracting the ardealite filtered out, ardealite It is stored up naturally after being delivered to discharging stockyard, since extraction is produced as consecutive production, ardealite unloading site constantly expands with production Greatly, the delivered length of ribbon conveyer constantly extends on ardealite accumulation body, but universal material pine on ardealite accumulation body It is soft, it is not enough to support bulky belt conveying machine equipment, if conveyer is fixed and is supported using traditional steel construction, by Possessing dehydration property, corrosivity in ardealite, pH value is about 2~3 or so, and ardealite dehydration sinks to cracking, and due to steelframe Structural support bottom surface contact area is smaller, often using may result in after 2 months steel structure support with ardealite sink and become Shape can topple commissure drawing crack, truss when serious, influence the continuous operation of production, even cause security incident sometimes, jeopardize Patrol officer's safety is operated, and influences the service life of ribbon conveyer, cost of equipment maintenance is added, if using in steel construction Truss is additionally arranged at the bottom of sleeper support, can not still change and be equipped with phosphorus stone since ardealite dehydration causes steel structure truss to be lowered into Cream ground, the problem of ribbon conveyer is caused to deform, and when extreme subsidence occurs in truss, occur being broken or have danger of toppling When dangerous, production has to shut down, and weight could be run into after carrying out laying installation to ribbon conveyer, affect production efficiency, and Corrosion of the shaped steel dismantled from steel structure truss due to receiving ardealite, cannot reuse, cause resource Huge waste.
The content of the invention
In order to solve the above technical problems, the present invention provides a kind of support constructions and its construction method for conveyer.
The present invention provides a kind of support construction and its construction method for conveyer, the supports for conveyer Structure includes support dam and conveyer bearing support, and the conveyer bearing support is arranged in institute along the length direction on the support dam The both sides in support dam crest face are stated, the support dam is respectively filled be integrated each other by multilayer dam body base and multilayer keel shoe Layer structure, wherein at least have one layer of keel shoe be arranged in it is described support dam bottom.
The keel shoe is geotechnological boom net.
The material of the dam body base is ardealite.
The height of the dam body base is less than 0.4 meter.
The conveyer bearing support includes being connected with each other the two-way double net screw thread steel skeletons and embedded board being integrated, two-way double Net screw thread steel skeleton is formed by welding by a plurality of screw-thread steel, and the material of embedded board is metal.
The construction method of the support construction for conveyer, comprises the following steps:
Step 1:Construction area is marked at the construction field (site);
Step 2:Usage mining machine flattens construction area described in step 1;
Step 3:The construction area described in step 2 after leveling is compressed using road roller;
Step 4:Construction area surface after compression described in step 3 is laid with one layer of geotechnological boom net;
Step 5:One layer of dam body base material is filled on the surface of geotechnological boom net described in step 4;
Step 6:Usage mining machine rolls dam body base material described in step 5, makes the high compression 60% of dam body base material;
Step 7:Step 4 is repeated to step 6 several times, obtain support dam.
The height of dam body base material described in the step 5 is less than 1 meter.
Dam body base material is ardealite described in the step 5.
The construction method of the support construction for conveyer is further comprising the steps of:
Step 1:It is connected as one using a plurality of screw-thread steel and is fabricated at least two two-way double net screw thread steel skeletons, use gold Belong to plate as embedded board, embedded board and two-way double net screw thread steel skeletons are connected as one, reinforced concrete support plate is made;
Step 2:Along described in step 7 the both sides in dam crest face is supported to be laid with reinforced concrete support plate respectively as conveyer Bearing support.
The diameter of screw-thread steel is 16mm described in the step 1.
The beneficial effects of the present invention are:
Using technical solution provided by the invention, on the soft foundation ground of original conveyer, existing phosphorus is utilized Gypsum is greatly saved resource, improves the level of resources utilization, support dam is enhanced using geotechnological boom net as dam body base material Structural strength, geotechnological boom net play the role of strengthen lacing wire, when soft ground settles, make on ground everywhere Sedimentation deformation is more uniform, avoids the failure that conveyor apparatus is caused to be broken, and conveyer is installed on by conveyer bearing support Support the top on dam, for traditional steel structure truss, conveyer bearing support forced area bigger, even if due to ardealite There is phenomena such as declining cracking in the dam body base of composition, since the stretcher of conveyer bearing support acts on, avoids conveyer supporting The phenomenon that frame discontinuity occurs and occurs deformation exempts from rack unbalance stress when chance and sinks to deforming, when support dam is run into It rains when weather, dam body base keeps uniform because rainwater settles, due to sinking, and conveyer bearing support can be mixed by reinforcing bar Screw adjusting makes conveyor apparatus holding horizontal at built-in fitting in solidifying soil support plate, avoids after being deformed due to conveyer frame Cause the failures such as travelling belt sideslip, ardealite fill after since globality is preferable, ardealite accumulation body sink after coagulation Earth foundation will not be hanging therewith sinking, and is balanced with adjusting bolt at this time or is kept rack from hanging place's backfill ardealite Balance ensures belt feeder normal operation and prevents to cave in because of rack fracture human casualty accident occurs, of the invention in addition to compare steel knot Structure truss, installation is simple, and required man-hour is less, and installation effectiveness is fast, and installation is drawn materials nearby, compared to traditional steel construction purlin The installation of frame considerably reduces construction material cost, and supporting & stablizing performance is good, and each shaped steel in conveyer frame is due to keeping away Exempted to settle into ardealite accumulation body, avoided it and corroded, installation and replacement are convenient, reduce plant maintenance into This.
Description of the drawings
Fig. 1 is structure diagram of the present invention for the support construction of conveyer;
Fig. 2 is the front view of conveyer bearing support of the present invention;
Fig. 3 is the top view of conveyer bearing support of the present invention;
Fig. 4 is the flow chart of construction method of the present invention.
In figure:1- supports dam, 2- conveyer bearing supports, 3- dam bodys base, 4- keel shoes, the two-way double net screw thread reinforcing bars of 5- Frame, 6- embedded boards, 7- inspections aisle.
Specific embodiment
Technical scheme is described further below in conjunction with attached drawing, but required protection domain does not limit to In;
The present invention provides a kind of support constructions and its construction method for conveyer;
As shown in Figure 1, Figure 2, Figure 3 shows, the support construction for conveyer includes support dam 1 and conveyer bearing support 2, conveying The length direction on machine bearing support 2 along support dam 1 is arranged in the both sides of support 1 top surface of dam, and support dam 1 is by multilayer dam body base 3 and multilayer keel shoe 4 respectively fill the layer structure being integrated each other, wherein at least there is one layer of keel shoe 4 to be arranged in support The bottom on dam 1.Further, keel shoe 4 is geotechnological boom net.The mesh gap of geotechnological boom net is not less than 1 meter.Dam body base 3 material is ardealite.The height of dam body base 3 is less than 0.4 meter.
Using technical solution provided by the invention, on the soft foundation ground of original conveyer, existing phosphorus is utilized Gypsum is greatly saved resource, improves the level of resources utilization, support dam is enhanced using geotechnological boom net as dam body base material Structural strength, geotechnological boom net play the role of strengthen lacing wire, when soft ground settles, make on ground everywhere Sedimentation deformation is more uniform, avoids the failure that conveyor apparatus is caused to be broken, and conveyer is installed on by conveyer bearing support Support the top on dam, for traditional steel structure truss, conveyer bearing support forced area bigger, even if due to ardealite There is phenomena such as declining cracking in the dam body base of composition, since the stretcher of conveyer bearing support acts on, avoids conveyer supporting The phenomenon that frame discontinuity occurs and occurs deformation exempts from rack unbalance stress when chance and sinks to deforming, when support dam is run into It rains when weather, dam body base keeps uniform because rainwater settles, due to sinking, and conveyer bearing support can be mixed by reinforcing bar Screw adjusting makes conveyor apparatus holding horizontal at built-in fitting in solidifying soil support plate, avoids after being deformed due to conveyer frame Cause the failures such as travelling belt sideslip, ardealite fill after since globality is preferable, ardealite accumulation body sink after coagulation Earth foundation will not be hanging therewith sinking, and is balanced with adjusting bolt at this time or is kept rack from hanging place's backfill ardealite Balance ensures belt feeder normal operation and prevents to cave in because of rack fracture human casualty accident occurs, of the invention in addition to compare steel knot Structure truss, installation is simple, and required man-hour is less, and installation effectiveness is fast, and installation is drawn materials nearby, compared to traditional steel construction purlin The installation of frame considerably reduces construction material cost, and supporting & stablizing performance is good, and each shaped steel in conveyer frame is due to keeping away Exempted to settle into ardealite accumulation body, avoided it and corroded, installation and replacement are convenient, reduce plant maintenance into This.
Further, conveyer bearing support 2 includes being connected with each other the two-way double net screw thread steel skeletons 5 and embedded board being integrated 6, two-way double net screw thread steel skeletons 5 are formed by welding by a plurality of screw-thread steel, and the material of embedded board 6 is metal.Conveyer frame with it is pre- Buried plate 6 is connected with adjustable bolt after preventing local subsidence and keeps rack balance.
Further, the both sides on dam 1 is supported to be additionally provided with inspection aisle 7.Maintenance personal couple can be facilitated by the inspection aisle 7 Conveyor apparatus is overhauled and safeguarded.
In addition, the present invention also provides a kind of construction method of the support construction for conveyer, as shown in figure 4, including Following steps:
Step 1:Construction area is marked at the construction field (site);
Step 2:Usage mining machine flattens step 1 construction area;
Step 3:Construction area of the step 2 after leveling is compressed using road roller;
Step 4:Construction area surface after step 3 compression is laid with one layer of geotechnological boom net;
Step 5:One layer of dam body base material is filled on the surface of step 4 geotechnique's boom net;Further, step 5 dam body base The height of material is less than 1 meter.Step 5 dam body base material is ardealite.
Step 6:Usage mining machine rolls step 5 dam body base material, makes the high compression 60% of dam body base material;
Step 7:Step 4 is repeated to step 6 several times, obtain support dam 1.
Further, the construction method for the support construction of conveyer is further comprising the steps of:
Step 1:It is connected as one using a plurality of screw-thread steel and is fabricated at least two two-way double net screw thread steel skeletons 5, used Embedded board 6 and two-way double net screw thread steel skeletons 5 are connected as one as embedded board 6, reinforced concrete support are made by metallic plate Plate;Further, the diameter of screw-thread steel is 16mm in step 1, and the sectional dimension after support dam fills is 4.5 meters long × wide by 0.80 Rice × 0.25 meter high.
Step 2:Reinforced concrete support plate is laid with respectively along the both sides of step 7 support 1 top surface of dam to support as conveyer Frame 2.
Using technical solution provided by the invention, gather materials on the spot on original conveyer foundation ground, utilization is existing Ardealite is greatly saved resource, improves the level of resources utilization, support is enhanced using geotechnological boom net as dam body base material The structural strength on dam, geotechnological boom net plays the role of strengthening lacing wire, when soft ground settles, makes each on ground Place's sedimentation deformation is more uniform, avoids the failure that conveyor apparatus is caused to be broken, and conveyer is installed by conveyer bearing support In the top on support dam, for traditional steel structure truss, conveyer bearing support forced area bigger, even if due to phosphorus stone There is phenomena such as declining cracking in the dam body base of cream composition, since the stretcher of conveyer bearing support acts on, avoids conveyer branch The phenomenon that bolster discontinuity occurs and occurs deformation exempts from rack unbalance stress when chance and sinks to deforming, when support dam is met To rainy when weather, dam body base keeps uniform because rainwater settles, due to sinking, and conveyer bearing support can pass through reinforcing bar Screw adjusting makes conveyor apparatus holding horizontal at built-in fitting on concrete support plate, avoids being deformed due to conveyer frame After cause the failures such as travelling belt sideslip, ardealite fill after since globality is preferable, ardealite accumulation body sink after mix Solidifying earth foundation will not be hanging therewith sinking, and is balanced with adjusting bolt at this time or is kept machine from hanging place's backfill ardealite Frame balance ensures belt feeder normal operation and prevents to cave in because of rack fracture human casualty accident occurs, of the invention in addition to compare steel Structure truss, installation is simple, and required man-hour is less, and installation effectiveness is fast, and installation is drawn materials nearby, compared to traditional steel construction The installation of truss considerably reduces construction material cost, and supporting & stablizing performance is good, each shaped steel in conveyer frame due to Avoid and settle into ardealite accumulation body, avoid it and corroded, installation and replacement are convenient, reduce plant maintenance into This.

Claims (10)

1. a kind of support construction for conveyer, it is characterised in that:It is described including support dam (1) and conveyer bearing support (2) The length direction of conveyer bearing support (2) along support dam (1) is arranged in the both sides of described support dam (1) top surface, described It is respectively to fill the layer structure being integrated each other by multilayer dam body base (3) and multilayer keel shoe (4) to support dam (1), In at least one layer of keel shoe (4) be arranged in it is described support dam (1) bottom.
2. a kind of support construction for conveyer as described in claim 1, it is characterised in that:The keel shoe (4) is soil Work boom net.
3. a kind of support construction for conveyer as described in claim 1, it is characterised in that:The dam body base (3) Material is ardealite.
4. a kind of support construction for conveyer as described in claim 1, it is characterised in that:The dam body base (3) Highly it is less than 0.4 meter.
5. a kind of support construction for conveyer as described in claim 1, it is characterised in that:The conveyer bearing support (2) include being connected with each other the two-way double net screw thread steel skeletons (5) being integrated and embedded board (6), two-way double net screw thread steel skeletons (5) It is formed by welding by a plurality of screw-thread steel, the material of embedded board (6) is metal.
6. a kind of construction method for implementing the support construction as described in any one of claim 1 to 5 for conveyer, feature exist In:Comprise the following steps:
Step 1:Construction area is marked at the construction field (site);
Step 2:Usage mining machine flattens construction area described in step 1;
Step 3:The construction area described in step 2 after leveling is compressed using road roller;
Step 4:Construction area surface after compression described in step 3 is laid with one layer of geotechnological boom net;
Step 5:One layer of dam body base material is filled on the surface of geotechnological boom net described in step 4;
Step 6:Usage mining machine rolls dam body base material described in step 5, makes the high compression 60% of dam body base material;
Step 7:Step 4 is repeated to step 6 several times, obtain support dam (1).
7. a kind of construction method of support construction for conveyer as claimed in claim 6, it is characterised in that:The step The height of the five dam body base materials is less than 1 meter.
8. a kind of construction method of support construction for conveyer as claimed in claim 6, it is characterised in that:The step The five dam body base materials are ardealites.
9. a kind of construction method of support construction for conveyer as claimed in claim 6, it is characterised in that:It is described to be used for The construction method of the support construction of conveyer is further comprising the steps of:
Step 1:It is connected as one using a plurality of screw-thread steel and is fabricated at least two two-way double net screw thread steel skeletons (5), use gold Belong to plate as embedded board (6), embedded board (6) and two-way double net screw thread steel skeletons (5) are connected as one, armored concrete is made Support plate;
Step 2:Along described in step 7 the both sides of dam (1) top surface is supported to be laid with reinforced concrete support plate respectively as conveyer branch Bolster (2).
10. a kind of construction method of support construction for conveyer as claimed in claim 9, it is characterised in that:The step The diameter of screw-thread steel is 16mm described in rapid 1.
CN201711135522.2A 2017-11-16 2017-11-16 A kind of support construction and its construction method for conveyer Pending CN108104153A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711135522.2A CN108104153A (en) 2017-11-16 2017-11-16 A kind of support construction and its construction method for conveyer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711135522.2A CN108104153A (en) 2017-11-16 2017-11-16 A kind of support construction and its construction method for conveyer

Publications (1)

Publication Number Publication Date
CN108104153A true CN108104153A (en) 2018-06-01

Family

ID=62206846

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711135522.2A Pending CN108104153A (en) 2017-11-16 2017-11-16 A kind of support construction and its construction method for conveyer

Country Status (1)

Country Link
CN (1) CN108104153A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102261053A (en) * 2011-05-12 2011-11-30 河海大学 Aseismatic measure of high earth-rock dam and construction method thereof
CN102966119A (en) * 2012-12-05 2013-03-13 青岛旭域土工材料股份有限公司 Geogrid reinforced wall and construction method thereof
CN106363795A (en) * 2016-08-31 2017-02-01 贵州开磷集团股份有限公司 Structure of ardealite slag discharging field and preparation method of structure
CN206256462U (en) * 2016-12-02 2017-06-16 贵阳开磷化肥有限公司 A kind of conveyer belt for using ardealite as dam body

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102261053A (en) * 2011-05-12 2011-11-30 河海大学 Aseismatic measure of high earth-rock dam and construction method thereof
CN102966119A (en) * 2012-12-05 2013-03-13 青岛旭域土工材料股份有限公司 Geogrid reinforced wall and construction method thereof
CN106363795A (en) * 2016-08-31 2017-02-01 贵州开磷集团股份有限公司 Structure of ardealite slag discharging field and preparation method of structure
CN206256462U (en) * 2016-12-02 2017-06-16 贵阳开磷化肥有限公司 A kind of conveyer belt for using ardealite as dam body

Similar Documents

Publication Publication Date Title
Grice Recent mine fill developments in Australia
CN107881858B (en) Railway foundation bed surface layer structure and laying method thereof
CN102011588A (en) House pillar type cutting and filling method of medium coal seam for controlling movement deformation of overlying rock
CN102979542B (en) A kind of Bolt-mesh-cable support technology
CN108049417A (en) A kind of high-locality landslide body reinforces method of disposal
CN105971606A (en) Extremely-thick coal seam longwall working face mining method
CN105386454B (en) A kind of joint assembling type base for power transmission tower
CN109899109B (en) Grouting filling method for irregular goaf
CN104404979B (en) H type stake panel wall construction method
CN110374111A (en) A kind of slope cooperates with support system with steel pipe piled anchor
CN110307034B (en) Strip type grouting filling method for goaf
CN206635599U (en) A kind of road surface for caving in road, which is speedily carried out rescue work, fixes device
CN108166978A (en) A kind of equipment arrangement system for three-soft seam stope
CN106088107B (en) A kind of tailings impoundment is in the method in Caving Method with Large Space production mine surface subsidence hole
CN102979534B (en) A kind of TU canopy support process
CN204041105U (en) A kind of skip bucket main vertical shaft fine ore collection device
CN204530425U (en) Prestressed steel truss bridge
CN102913255A (en) Method for preventing bottom board of deep-seated heading from bulging and deforming
CN109209484B (en) Auxiliary working face withdrawing method for withdrawing channel combined with paste prefabricated block
CN108104153A (en) A kind of support construction and its construction method for conveyer
CN111502721A (en) Joint roadway concrete joint supporting structure and construction method thereof
CN204199296U (en) Based on the foundation pit supporting construction of old outer wall of basement structure
CN207714168U (en) Stone discharge device is blocked for mud-rock flow protection
CN209385151U (en) A kind of structure handling tunnel roof fall
CN109958456B (en) Advanced reinforcement construction method for building tunnel in stratum without self-stability capability

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
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20180601