CN204851303U - Drawhole supporting construction - Google Patents

Drawhole supporting construction Download PDF

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Publication number
CN204851303U
CN204851303U CN201520589917.XU CN201520589917U CN204851303U CN 204851303 U CN204851303 U CN 204851303U CN 201520589917 U CN201520589917 U CN 201520589917U CN 204851303 U CN204851303 U CN 204851303U
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China
Prior art keywords
steel
crossbeam
drawhole
rail
supporting
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CN201520589917.XU
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Chinese (zh)
Inventor
刘华武
刘育明
冯兴隆
葛启发
吴明
陈小伟
赵冰峰
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Yunnan Diqing Nonferrous Metals Co Ltd
China ENFI Engineering Corp
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Yunnan Diqing Nonferrous Metals Co Ltd
China ENFI Engineering Corp
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Priority to CN201520589917.XU priority Critical patent/CN204851303U/en
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Publication of CN204851303U publication Critical patent/CN204851303U/en
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Abstract

The utility model belongs to the building field specifically is a drawhole supporting construction, its characterized in that includes well long anchor rope, stock, steel fiber concrete layer, crossbeam, bottom plate rail and bottom plate connecting reinforcement, wherein: tunnel two help with the vault steel fiber shotcrete of portion to close plating net, beat the stock and well long anchor rope is strutted, and the bottom sets up dress ore deposit admission passage bottom plate, adorns and lays the rail on the admission passage bottom plate of ore deposit, set up the crossbeam in drawhole eyebrow line department, the crossbeam adopts the angle steel to weld in succession to form in the lower flange on by two rows of I -steel, outside both sides of crossbeam and middle part set up the bearing diagonal, and the bearing diagonal is the channel -section steel, and both ends are connected with crossbeam and steel sheet respectively, and the steel sheet is fixed with the resin stock at tunnel lateral wall and top respectively. The utility model discloses a drawhole supporting construction, the maintenance cost is low, and the shaping is rapid, and is safe practical.

Description

Drawhole supporting and protection structure
Technical field
The utility model belongs to building field, is specially a kind of drawhole supporting and protection structure.
Background technology
Supporting is the stable and construction safety after underground chamber excavation, and the support taked, reinforcement or the component of coating country rock or the general name of other measures.When adopting New Austrian Tunneling Method construction, temporary lining and permanent support two class can be divided by support action effect, comprise the polytype such as combined bolting and shotcrete, steel wood support, concrete lining, grouting support.
Combined bolting and shotcrete refers to by means of pressure-injected cement concrete and the synergy reinforcing rock stratum squeezing into the anchor metal in rock stratum, is divided into temporary supporting structure and permanent supporting and protection structure.Sprayed mortar can as the preliminary bracing of surrounding rock of chamber, also can as permanent supporting.Combined bolting and shotcrete makes anchor pole, concrete spray coating and country rock form coefficient system, prevents rock-mass relaxing, separation.Certain thickness country rock is transformed into self-supporting arch, stabilizing surrounding rock effectively.When rock mass is more broken, steel mesh reinforcement can also be utilized to draw the little sillar kept off between anchor pole, Concrete Structure spray-up, auxiliary combined bolting and shotcrete.
Some mining area is positioned at weak structural belt, in future mining process, due to the increasing of chamber section, will cause the bad stability of surrounding rock of chamber, and the structural belt along mutual meet produces large-scale distortion, and collapse breakoff phenomenon.For the mining area adopting Block caving system, the vertical orebody trend in ore removal horizontal Chuan Mai tunnel is arranged, the stress that polycrystalline substance bears is comparatively large, and existing supporting and protection structure can not meet the requirement of stability.
The supporting of natural caving method in China drawhole mainly adopts builds plain concrete supporting (domestic only Tongkuangyu copper one adopts natural caving method), it is a kind of passive protecting form, and working procedure is long, complicated construction technique, and after being subject to stress easily there is deformation failure in plain concrete.Steel fibrous shotcrete+anchor pole+wire lath+middle long anchor cable that our supporting adopts, making full use of bearing capacity of the wall rock, is a kind of positive support form.And adopting the construction of concrete ejection chassis, rock bolting jumbo, anchor cable chassis, speed of application is fast, and intensity is high.
Summary of the invention
The problem of stability requirement can not be met for existing supporting and protection structure under extreme terrain requirement, the utility model proposes a kind of drawhole supporting and protection structure.
Drawhole supporting and protection structure of the present utility model, is characterized in that comprising middle long anchor cable, anchor pole, steel fibrous concrete layer, crossbeam, base plate rail and base plate connecting reinforcement, wherein:
At roadway's sides and dome portions steel fiber shotcrete, and close plating net, beat anchor pole and middle long cable supporting, bottom arranges dress ore deposit route base plate, steel rail laying on the route base plate of dress ore deposit;
At drawhole open wiring, place arranges crossbeam, and crossbeam adopts angle steel continuous welding to form by bottom flange on two row's i iron; Crossbeam both sides external and middle part arrange bearing diagonal, and bearing diagonal is channel-section steel, and two ends are connected with steel plate with crossbeam respectively, and steel plate is fixed with the resin anchor at tunnel sidewall and top respectively.
Long cable supporting in increase is helped, strengthening supporting intensity in arch, tunnel and two.Two help two anchor cable length 6.0m (side wall anchor cable length, depending on condition, is avoided punching tunnel), and arch anchor cable length 8.0m, cable interval is 1.5m, and array pitch is 2.0m.Anchor cable is made up of the 1X7 standard steel section twisted wire (GB/T5224-2003) of two 15.20mm, and adopt the mortar total length bonding of cement-sand ratio 2:1, anchor head adopts the ground tackle of MJ-1 type.
Described crossbeam towards ore stream side welded high-strength wear-resisting steel plate, to strengthen the abrasion resistance of crossbeam.
Described dress ore deposit route base plate adopts the concrete that 300mm is thick, above parallel laid 5 one steel rail, rail spacing 800mm, is fixed by bar connecting between rail, rebar spacing 500mm.
Towards ore stream side welded high-strength wear-resisting steel plate, effectively can reduce the wearing and tearing of ore flowing to open wiring component, strengthen the abrasion resistance of crossbeam.Dress ore deposit route base plate adopts the thick concrete of 300mm, and be conducive to scraper and run and shovel dress, steel rail laying on concrete simultaneously, rail exceeds concrete surface, can effectively prevent scraper scraper bowl to the wearing and tearing of roadway floor.
Drawhole supporting and protection structure of the present utility model, maintenance cost is low, rapidly shaping, safe and practical.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Wherein, middle long anchor cable 1, anchor pole 2, steel fibrous concrete layer 3, crossbeam 4, base plate rail 5, base plate connecting reinforcement 6.
Detailed description of the invention
Embodiment 1: drawhole open wiring support unit crossbeam 4 adopts two row's H-shaped steel supportings, the pre-buried degree of depth 350mm of i iron, i iron model is 40a, and the two row edges of a wing, i iron upper and lower part adopt angle steel to carry out continuous welding, angle steel model is 100*10, and weld bead height is 10mm.
In order to web beam 4 abrasion resistance, inside the i iron towards ore stream, increase high-strength abrasion-proof steel plate, between wear-resisting steel plate and i iron, adopt continuous welding, weld bead height 16mm.Wear-resisting steel plate and upper and lower part angle steel welding edges are linked to be entirety, weld bead height 10mm.
Increase bearing diagonal in crossbeam 4 both sides external and middle part, strengthen the impact resistance of crossbeam 4, bearing diagonal is made up of a channel-section steel, and channel-section steel model is 18a.Channel-section steel one end and Plate Welding, plate size is 400mm*300mm*20mm, and steel plate adopts resin anchor 2 to carry out anchoring with tunnel sidewall and top respectively, and anchor pole 2 body uses the secondary screw-thread steel of 22mm, and length is 2.25m; The other end welds with i iron, weld bead height 8mm.
After crossbeam 4 sets up, the employing of crossbeam 4 top is built steel fibrous concrete and is reinforced, concrete strength C30.Steel fibre recommended parameter is diameter 0.5mm, length 25mm, and tensile strength is greater than 1000MPa, and addition is 40kg/m concrete, and actual addition suitably can adjust according to field condition.
Dress ore deposit route base plate thickness 300mm, lay 5 one steel rails, rail level exceeds concrete floor 5mm, rail spacing 800mm.Utilize Φ 26mm bar connecting to be entirety between rail, rebar spacing is 500mm.

Claims (3)

1. drawhole supporting and protection structure, is characterized in that comprising middle long anchor cable (1), anchor pole (2), steel fibrous concrete layer (3), crossbeam (4), base plate rail (5) and base plate connecting reinforcement (6), wherein:
At roadway's sides and dome portions steel fiber shotcrete, and close plating net, play anchor pole (2) and middle long anchor cable (1) supporting, bottom arranges dress ore deposit route base plate, steel rail laying on the route base plate of dress ore deposit;
Arrange crossbeam (4) at drawhole open wiring place, crossbeam (4) adopts angle steel continuous welding to form by bottom flange on two row's i iron; Crossbeam (4) both sides external and middle part arrange bearing diagonal, and bearing diagonal is channel-section steel, and two ends are connected with steel plate with crossbeam (4) respectively, and steel plate is fixed with the resin anchor (2) at tunnel sidewall and top respectively.
2. drawhole supporting and protection structure as claimed in claim 1, is characterized in that described crossbeam (4) is towards ore stream side welded high-strength wear-resisting steel plate.
3. drawhole supporting and protection structure as claimed in claim 1, is characterized in that described dress ore deposit route base plate adopts the concrete that 300mm is thick, above parallel laid 5 one steel rail, rail spacing 800mm, is fixed by bar connecting between rail, rebar spacing 500mm.
CN201520589917.XU 2015-08-07 2015-08-07 Drawhole supporting construction Active CN204851303U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520589917.XU CN204851303U (en) 2015-08-07 2015-08-07 Drawhole supporting construction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520589917.XU CN204851303U (en) 2015-08-07 2015-08-07 Drawhole supporting construction

Publications (1)

Publication Number Publication Date
CN204851303U true CN204851303U (en) 2015-12-09

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Application Number Title Priority Date Filing Date
CN201520589917.XU Active CN204851303U (en) 2015-08-07 2015-08-07 Drawhole supporting construction

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106401601A (en) * 2016-11-10 2017-02-15 中国恩菲工程技术有限公司 Support device for eyebrow line of ore drawing opening

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106401601A (en) * 2016-11-10 2017-02-15 中国恩菲工程技术有限公司 Support device for eyebrow line of ore drawing opening
CN106401601B (en) * 2016-11-10 2019-06-11 中国恩菲工程技术有限公司 Drawhole open wiring suspension device

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