CN105386787B - A kind of underground drop shaft lateral wall guard method - Google Patents

A kind of underground drop shaft lateral wall guard method Download PDF

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Publication number
CN105386787B
CN105386787B CN201510544736.XA CN201510544736A CN105386787B CN 105386787 B CN105386787 B CN 105386787B CN 201510544736 A CN201510544736 A CN 201510544736A CN 105386787 B CN105386787 B CN 105386787B
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China
Prior art keywords
wall
lateral wall
plate
welding
embedded
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CN201510544736.XA
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CN105386787A (en
Inventor
周凌志
刘天信
余红
曹益平
王立明
倪进虎
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Nanjing Baodi Meishan Industrial City Development Co.,Ltd.
Original Assignee
Shanghai Meishan Iron and Steel Co Ltd
Nanjing Meishan Metallurgy Development Co Ltd
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Application filed by Shanghai Meishan Iron and Steel Co Ltd, Nanjing Meishan Metallurgy Development Co Ltd filed Critical Shanghai Meishan Iron and Steel Co Ltd
Priority to CN201510544736.XA priority Critical patent/CN105386787B/en
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F13/00Transport specially adapted to underground conditions
    • E21F13/04Transport of mined material in gravity inclines; in staple or inclined shafts

Abstract

The present invention relates to a kind of underground drop shaft lateral wall guard methods, carry out as follows:The first step removes existing lateral wall plate, several through-holes is issued on wall pre-embedded plate;The distribution of second step, the embedded anchor bar on drop shaft lateral wall wall, anchor pole is adapted with the through-hole on wall pre-embedded plate;Third walks, and wall pre-embedded plate is covered to regulation wall, and anchor pole is fixed using layer solid welding with wall pre-embedded plate;4th step lifts lateral wall plate to predetermined station, and lateral wall plate and the joining place of wall pre-embedded plate are fixed using layer solid welding;Firm failure rate is low safely for the installation method.

Description

A kind of underground drop shaft lateral wall guard method
Technical field
The present invention relates to a kind of underground guard methods, are specifically a kind of underground drop shaft lateral wall guard methods, belong to mine Mountain underground transportation technical field.
Background technology
Drop shaft belongs to mine and builds engineering, and every mouthful of drop shaft is typically provided 2 groups of lateral wall, and composed structure is that welding is assembled, steel material: A3 steel and proximate matter (angle bar), 15 ° of design grade.Single drop shaft lateral wall uses 2 years, under motor judder, lateral wall steel knot Anchor pole is broken in structure and slip casting structure, steel plate structure disequilibrium point between lateral wall and wall, and Cement for walls structure is also therewith It is soft, cause lateral wall integral inclined, lateral wall steel construction is also broken therewith with weld seam at embedded board, welding seam failure, and causes lateral wall Phenomena such as tearing, running side, dehisce causes to produce on one side to raw ore production, and one side raw ore walks the case where being spilt at lateral wall, also increases The serial difficulty of repair.
Invention content
The technical problem to be solved by the present invention is to:Overcome the problems, such as of the existing technology, a kind of mounting structure jail is provided The underground drop shaft lateral wall guard method leaned on.
The technical solution that the present invention solves its technical problem is as follows:
A kind of underground drop shaft lateral wall guard method, carries out as follows:The first step removes existing lateral wall plate, in wall Several through-holes is issued on body embedded board;Second step, the embedded anchor bar on drop shaft lateral wall wall, the distribution of anchor pole and wall pre-embedded Through-hole on plate is adapted;Third walks, and wall pre-embedded plate is covered to regulation wall, and anchor pole is welded with wall pre-embedded plate using layer It is fixed;4th step lifts lateral wall plate to predetermined station, and lateral wall plate and the joining place of the wall pre-embedded plate use layer solid welding It is fixed.
Further perfect technical solution is as follows by the present invention:
Preferably, in second step, the installation of anchor pole is specially:Wall was got into blind hole before this, was then noted in blind hole Enter cement, be finally inserted anchor pole, wherein anchor pole extends thickness of the length not less than wall pre-embedded plate of blind hole.
Preferably, the layer soldering set concrete conditions in the establishment of a specific crime in third step and the 4th step is:The angular range of welding rod and welding direction is 70- 90 °, welding rod angle, the angle of welding rod and welding direction is 70-90 ° when spending, and electric arc is concentrated, and bath temperature is high, and angle is small, electric arc Dispersion, bath temperature is relatively low, the phenomenon that having efficiently controlled tap points indent;Weld seam uses multi-layer multi-pass welding, every layer of welding Afterwards, welding surface need to be polishing to no visible foreign matters or pit;Weld seam is higher than plate face 0-2mm;Pad continues at 200-350 DEG C 2-6h is kept the temperature, cooling velocity is further slowed down, increases plasticity, toughness, and reduce tendency of hardenability, eliminates the diffusible hydrogen in connector; Solder joint temperature is 600-650 DEG C, keeps the temperature 1-2h, and postwelding eliminates stress.
Preferably, pneumatic pick of the blind hole with diameter not less than 26mm is got, and hole depth is not less than 60mm;The cement grade is not small In 400, bolt diameter is slightly less than pneumatic pick diameter, rock-bolt length 400mm, material quality of bolt 20Mnsi;Wall pre-embedded plate thickness is 30mm。
Preferably, the joining place thickness of pre-embedded steel slab and lateral wall plate is 30mm, welds back cover layer choosing φ 3.2mm welding rods, Welding current 80-80A;Filling capping layer choosing selects φ 4.0mm welding rods, welding current 165-175A.
The present invention utilize unique fixation and welding technique so that drop shaft lateral wall installation it is firm, equipment start in year rate by Original 80% is promoted to 98.5%, and failure cause is nor because the problem of fixed point or weld seam, pad fatigue Strength degree is more than 250MPa.
Description of the drawings
Nothing
Specific implementation mode
With reference to embodiment, present invention is further described in detail.But the present invention is not limited to given examples.
Embodiment 1
A kind of underground drop shaft lateral wall guard method provided in this embodiment, carries out as follows:
The first step removes existing lateral wall plate, several through-holes is issued on wall pre-embedded plate;
Second step, the embedded anchor bar on drop shaft lateral wall wall, the installation of anchor pole are specially:Wall was got before this blind Hole, pneumatic pick of the blind hole with diameter not less than 26mm are got, and hole depth is not less than 60mm;Wall pre-embedded plate thickness is 30mm;Then exist Cement is injected in blind hole, cement grade is not less than 400, is finally inserted anchor pole, bolt diameter is slightly less than pneumatic pick diameter, rock-bolt length 400mm, material quality of bolt 20Mnsi;
The distribution of anchor pole is adapted with the through-hole on wall pre-embedded plate;
Third walks, and wall pre-embedded plate is covered to regulation wall, and the joining place thickness of pre-embedded steel slab and lateral wall plate is 30mm; Anchor pole is fixed using layer solid welding with wall pre-embedded plate, welds back cover layer choosing φ 3.2mm welding rods, welding current 80-80A;Filling lid Face layer choosing selects φ 4.0mm welding rods, welding current 165-175A;The angular range of welding rod and welding direction be 70-90 ° (preferably 80°);Weld seam uses multi-layer multi-pass welding that welding surface need to be polishing to no visible foreign matters or pit after every layer of welding;Weld seam is high In plate face 0-2mm;Pad persistently keeps the temperature 2-6h at 200-350 DEG C;Solder joint temperature is 600-650 DEG C, keeps the temperature 1-2h.
4th step lifts lateral wall plate to predetermined station, and the joining place thickness of pre-embedded steel slab and lateral wall plate is 30mm, lateral wall The joining place of plate and wall pre-embedded plate is fixed using layer solid welding, and the angular range of welding rod and welding direction is 60-80 °;Weld seam uses Multi-layer multi-pass welding welds back cover layer choosing φ 3.2mm welding rods, welding current 80-80A;Filling capping layer choosing selects φ 4.0mm welderings Welding surface need to be polishing to no visible foreign matters or pit by item after every layer of welding of welding current 165-175A;Weld seam is higher than plate face 0- 2mm;Pad persistently keeps the temperature 2-6h at 200-350 DEG C;Solder joint temperature is 600-650 DEG C, keeps the temperature 1-2h.
The beneficial effects of the invention are as follows:
1, without the guard method when, lateral wall year break down about 18 times, after adopting this method, year failure rate do not surpass It crosses primary.
2, the non-occurrence of equipment failure of this method after being transformed eliminates side plate and shifts the hidden danger fallen, while improving equipment can Start 15% or more rate.
3, materials of the present invention are few, make simply, and it is convenient to replace, and application range is very extensive.
In addition to the implementation, the present invention can also have other embodiment.It is all to use equivalent substitution or equivalent transformation shape At technical solution, fall within the scope of protection required by the present invention.

Claims (3)

1. a kind of underground drop shaft lateral wall guard method, it is characterised in that:It carries out as follows:
The first step removes existing lateral wall plate, several through-holes is issued on wall pre-embedded plate;Second step, in drop shaft lateral wall wall The distribution of upper embedded anchor bar, the anchor pole is adapted with the through-hole on wall pre-embedded plate, and the installation of the anchor pole is specially:First It is that wall is got into blind hole, cement is then injected in blind hole, be finally inserted anchor pole, wherein anchor pole extends the length of blind hole Not less than the thickness of wall pre-embedded plate;Third walks, and wall pre-embedded plate is covered to regulation wall, the anchor pole and wall pre-embedded plate It is fixed using layer solid welding;4th step lifts lateral wall plate to predetermined station, and lateral wall plate and the joining place of the wall pre-embedded plate use Layer solid welding is fixed;The third is walked is with the layer soldering set concrete conditions in the establishment of a specific crime in the 4th step:The angular range of welding rod and welding direction is 70- 90°;Weld seam uses multi-layer multi-pass welding that welding surface need to be polishing to no visible foreign matters or pit after every layer of welding;Weld seam is higher than Plate face 0-2mm;Pad persistently keeps the temperature 2-6h at 200-350 DEG C;Solder joint temperature is 600-650 DEG C, keeps the temperature 1-2h.
2. underground drop shaft lateral wall guard method according to claim 1, it is characterized in that:The blind hole is not less than 26mm with diameter Pneumatic pick get, hole depth be not less than 60mm;The cement grade is not less than 400, and bolt diameter is slightly less than pneumatic pick diameter, and anchor pole is long Spend 400mm, material quality of bolt 20MnSi;Wall pre-embedded plate thickness is 30mm.
3. underground drop shaft lateral wall guard method according to claim 2, characterized in that the wall pre-embedded plate and lateral wall plate Joining place thickness is 30mm, welds back cover layer choosing φ 3.2mm welding rods, welding current 80-80A;Filling capping layer choosing selects φ 4.0mm welding rods, welding current 165-175A.
CN201510544736.XA 2015-08-31 2015-08-31 A kind of underground drop shaft lateral wall guard method Active CN105386787B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510544736.XA CN105386787B (en) 2015-08-31 2015-08-31 A kind of underground drop shaft lateral wall guard method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510544736.XA CN105386787B (en) 2015-08-31 2015-08-31 A kind of underground drop shaft lateral wall guard method

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CN105386787B true CN105386787B (en) 2018-09-25

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102226397A (en) * 2011-05-20 2011-10-26 北京科技大学 Method for reinforcing drop shaft in underground mine producing area
CN203050776U (en) * 2013-02-06 2013-07-10 长沙有色冶金设计研究院有限公司 Main draw shaft and branch oblique drop pit protecting facility thereof
CN203836187U (en) * 2014-04-24 2014-09-17 南京梅山冶金发展有限公司 Ore leakage preventing sealing device of underground winze vibration ore drawing machine
CN104627563A (en) * 2015-01-27 2015-05-20 中钢集团马鞍山矿山研究院有限公司 Strengthening method for preventing detachment of lining of ore storage bin

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6014700A (en) * 1983-07-05 1985-01-25 Nippon Steel Corp Bottom structure of low temperature tank

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102226397A (en) * 2011-05-20 2011-10-26 北京科技大学 Method for reinforcing drop shaft in underground mine producing area
CN203050776U (en) * 2013-02-06 2013-07-10 长沙有色冶金设计研究院有限公司 Main draw shaft and branch oblique drop pit protecting facility thereof
CN203836187U (en) * 2014-04-24 2014-09-17 南京梅山冶金发展有限公司 Ore leakage preventing sealing device of underground winze vibration ore drawing machine
CN104627563A (en) * 2015-01-27 2015-05-20 中钢集团马鞍山矿山研究院有限公司 Strengthening method for preventing detachment of lining of ore storage bin

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
核岛主蒸汽管道的焊接;朱向楠;《焊接技术》;20051231;第34卷(第6期);第37-39页 *
溜井系统矿仓加固形式的探讨;安建英等;《有色矿山》;20020228;第31卷(第1期);第13-16页 *

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Address after: 210039 new building, Zhonghua Gate, Yuhuatai District, Jiangsu, Nanjing

Patentee after: Nanjing Baodi Meishan Industrial City Development Co.,Ltd.

Patentee after: SHANGHAI MEISHAN IRON & STEEL Co.,Ltd.

Address before: 210039 new building, Zhonghua Gate, Yuhuatai District, Jiangsu, Nanjing

Patentee before: NANJING MEISHAN METALLURGY DEVELOPMENT Co.,Ltd.

Patentee before: SHANGHAI MEISHAN IRON & STEEL Co.,Ltd.

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Effective date of registration: 20211021

Address after: 210039 new building, Zhonghua Gate, Yuhuatai District, Jiangsu, Nanjing

Patentee after: Nanjing Baodi Meishan Industrial City Development Co.,Ltd.

Address before: 210039 new building, Zhonghua Gate, Yuhuatai District, Jiangsu, Nanjing

Patentee before: Nanjing Baodi Meishan Industrial City Development Co.,Ltd.

Patentee before: SHANGHAI MEISHAN IRON & STEEL Co.,Ltd.