CN1963152B - Steel stand for mine supporting anchor cable and method for processing same - Google Patents
Steel stand for mine supporting anchor cable and method for processing same Download PDFInfo
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- CN1963152B CN1963152B CN200610161912A CN200610161912A CN1963152B CN 1963152 B CN1963152 B CN 1963152B CN 200610161912 A CN200610161912 A CN 200610161912A CN 200610161912 A CN200610161912 A CN 200610161912A CN 1963152 B CN1963152 B CN 1963152B
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Abstract
A cable for mine support and protective tendon comprise a twisted multi-piece cable that uses 1X 19 single wire with outside, middle and center layer structure and the diameter of the single wire ranges from phi3.1mm-phi6mm. The process includes the following procedures: rod bundle->inspection->acid dipping and bonderizing->inspection->pulling->semi-finished parts inspection -> predeformation -> twisting-> postdeformation -> eliminating stress -> layered tangle -> inspection -> packing and warehouse. The mine support and protective tendon uses big elongation prestress cable with diameters of 18mm,20mm, and 22mm respectively, made of three 1X19 wires in concurrent and reverse twist, broken load reaching over 400KN,,450KN,550KN respectively and the elongation rate after broken more than 7%.Used in lane support and protect, the invention greatly improves the mine lane's stability and security and digging speed, and effectively reduces the spacing between tendon.
Description
Technical field
The present invention relates to a kind of mine support anchor cable with big elongation per unit length prestress wire and processing method thereof.
Background technology
China's prestressed concrete member, ground anchorage extensively adopt the construction steel twisted wire of 1 * 7 structure at present, and diameter is 12.7mm and 15.24mm, and its breaking load is respectively 184KN and 260KN, and elongation rate only is 〉=3.5%.Mine timbering is all used prestress wire for building, and the diameter of steel strand, breaking load, elongation rate all do not reach the requirement of mine support.
In recent years, the China's coal-mine security incident takes place again and again, and gas, floods, roof accident are all closely related with prestressing steel intensity, ductility.The subject matter that present mining small-bore anchor cable prestress wire exists is:
1. the steel strand diameter is little, and is poor bigger with the footpath of bore diameter (28mm), and the utilization rate of the resin anchoring agent that anchoring is used (powder stick) is low, and mechanics effect is poor.
2. the steel strand breaking load is less, heavily stressed, adopted and roadway support that geologic structure influences the disrumpent feelings phenomenon of steel strand often occurs in using.
3. the steel strand elongation per unit length is low, large deformation that can not suitable for surrounding rock.
4. the impact absorbing energy of steel strand is lower.
Therefore special-purpose high strength, big elongation per unit length anchor cable material are badly in need of in mine support, effectively control surrouding rock deformation, guarantee the stable of rock stratum.
Summary of the invention
Purpose of the present invention just provides a kind of mine support anchor cable with big elongation per unit length prestress wire and processing method thereof, poor bigger with the footpath that solves steel strand diameter that prior art exists and bore diameter, the utilization rate of the resin anchoring agent that anchoring is used (powder stick) is low, and mechanics effect is poor; The steel strand breaking load is less; The steel strand elongation per unit length is low, large deformation that can not suitable for surrounding rock; And the lower problem of the impact absorbing energy of steel strand.
Technical scheme of the present invention is:
A kind of mine support anchor cable adopts 1 * 19 monofilament to be divided into skin, the three layers of twisting structure in intermediate layer and center with the processing method of steel strand, these steel strand, and the processing method of described steel strand may further comprise the steps:
Wire rod → check → acid washing phosphorization → check → drawing → the inspection of semifinished product → predeformation → sth. made by twisting strand → after be out of shape → eliminate stress processing → layer twine → check → pack warehouse-in; Wherein:
The trade mark of described wire rod is the SWRH82B-2 dish, and contained chemical composition is:
| C | Si | Mn | P | S | Cr |
| 0.79～0.85 | 0.15～0.35 | 0.60～0.90 | ≤0.025 | ≤0.25 | 0.18～0.24 |
Described drawing step is that the wire rod that diameter is respectively Φ 9.0mm, Φ 12.5mm, Φ 13.0mm is reduced to the monofilament that diameter is Φ 3.10mm, Φ 5.5mm, Φ 6.0mm;
The described lay pitch of twisting with the fingers in burst step is respectively, and the intermediate layer is 9D, and skin is 11D, and wherein D is the nominal diameter of steel strand;
Temperature in the described treatment step that eliminates stress is 430～450 ℃, and tension force is 150～165KN.
The present invention is the mine support anchor cable with big elongation per unit length prestress wire, adopt three layers on 1 * 19 steel wire in the same way or oppositely twisting processing, diameter is 18mm, 20mm, 22mm, and breaking load reaches 400KN, 450KN respectively, more than the 550KN, and elongation after fracture reaches more than 7%.Carry out roadway support with newly-invented mine support anchor cable with big elongation per unit length prestress wire, improved the stability and the safety of mine working greatly, effectively reduce anchor cable between array pitch, driving speed is also improved a lot.
Description of drawings
Fig. 1 is the cross section structure schematic diagram of embodiment of the rotation direction identical (twisting structure in the same way) in equal diameter of the present invention, outer and intermediate layer;
Fig. 2 is the lateral plan of Fig. 1;
Fig. 3 is equal diameter of the present invention, the outer cross section structure schematic diagram opposite with the rotation direction in intermediate layer;
Fig. 4 is the lateral plan of Fig. 3;
Fig. 5 is that the cross section structure schematic diagram of filling (interior filling), the intermediate layer embodiment identical or opposite with outer field rotation direction than the minor diameter monofilament is adopted in intermediate layer of the present invention;
Fig. 6 is the cross section structure schematic diagram of outer employing size diameter monofilament arranged alternate of the present invention (the outer filling), the intermediate layer embodiment identical or opposite with outer field rotation direction.
The specific embodiment
Referring to Fig. 1～Fig. 6, basic structure of the present invention is the multifilament that is twisted together, and promptly adopts 1 * 19 monofilament to be divided into skin 3, the 1 three layers of twisting structure in intermediate layer 2 and center, and the diameter of monofilament is φ 3.1mm～φ 6.0mm.
The filament diameter of three layers of twisting structure illustrated in figures 1 and 2 is equal diameter, and its skin 3 is identical with the rotation direction (being the twisting direction) in intermediate layer 2.
The filament diameter of Fig. 3 and three layers of twisting structure shown in Figure 4 also is an equal diameter, and it is outer 3 opposite with the twisting direction in intermediate layer 2.
Referring to Fig. 5, the skin 3 of described three layers of twisting structure adopts than the major diameter monofilament with center 1, between the two middle gap layer adopts than the minor diameter monofilament and fills (filling type structure in being called), and the twisting direction in this skin 3 and intermediate layer 2 also can be identical or opposite.
Referring to Fig. 6, adopt than the major diameter monofilament with center 1 in the intermediate layer 2 of described three layers of twisting structure, and outer 3 adopt big monofilament 32 and less monofilament 31 to arrange along circle alternate, and less monofilament 31 is as filling, so this structure is also referred to as outer filling type structure.The rotation direction in this skin 3 and intermediate layer 2 also can be identical or opposite.
Because the strand structure that many steel wire multilayers are twisted into elongation is big, flexible good, the elongation per unit length height reaches more than 7%, has improved more than 40% than 1 * 7 structure, and has brought convenience, steel strand can coil into the following dish of 2m to the down-hole construction, and is convenient with the tunnel transportation.
Can select different structures according to different purposes.
The monofilament of described three layer construction is that the SWRH82B-2 wire rod is as raw material by adopting the trade mark; The wire rod chemical composition is referring to table 1, and mechanical property sees Table 2.
Table 1: wire rod chemical composition
| The trade mark | C | Si | Mn | P | S | Cr |
| SWRH82B-1 | 0.79～0.85 | 0.15～0.35 | 0.60～0.90 | ≤0.025 | ≤0.025 | 0.18～0.24 |
Table 2: the mechanical property of wire rod
| Specification | Intensity | The contraction percentage of area | Elongation rate |
| ∮13.0mm | ≥1200MPa | ≥30％ | ≥7％ |
| ∮12.5mm | ≥1180MPa | ≥30％ | ≥7％ |
| ∮9.0mm | ≥1050MPa | ≥30％ | ≥7％ |
According to mine support bore diameter size, the diameter that requires steel strand is between φ 18mm～φ 22mm, and therefore finished diameter of the present invention is divided into φ 18mm, φ 20mm, three kinds of specifications of φ 22mm.
The mechanical property of different-diameter finished product of the present invention is as follows:
1, breaking load F
b
φ18mm：F
b≥400KN，
φ20mm：F
b≥450KN，
φ22mm：F
b≥550KN。
2, elongation rate: 〉=7%
The present invention is the mine support anchor cable with big elongation per unit length prestress wire, adopts 1 * 19 steel wire twisting structure, and diameter is 18mm, 20mm, 22mm, and breaking load reaches 400KN, 450KN respectively, more than the 550KN, and elongation after fracture reaches more than 7%.Carry out roadway support with newly-invented mine support anchor cable with big elongation per unit length prestress wire, improved the stability and the safety of mine working greatly, effectively reduce anchor cable between array pitch, driving speed also is greatly improved.Improve the anchoring ability of mine support anchor cable, thereby improve roadway support effect and stability, reduce security incident.
Former steel strand structure is 1 * 7 structure, two-layer filament diameter is basic identical, the steel strand filament diameter of φ 18mm～φ 22mm specification will reach φ 6mm～φ 7mm, because China's high speed wire bar maximum gauge is φ 13mm at present, maximum intensity 1200MP a, intensity has only 1670～1770Mpa when being drawn into φ 6mm～φ 7mm, and steel strand integral root breaking load only has about 400k N.Therefore we adopt 1 * 19 twisting structure, divide three layers of twisting, the steel strand of same specification, filament diameter only is φ 3.1mm～φ 6.0mm, intensity can reach 1860MPa, and the net sectional area of 1 * 19 structural iron twisted wire has strengthened more than 10% than the sectional area of 1 * 7 structural iron twisted wire of same appearance and size, and the breaking load of whole steel strand has improved 10%～20%, reach more than the 550k N, improved anchored force greatly.
Because the strand structure that many steel wire multilayers are twisted into elongation is big, flexible good, the elongation per unit length height reaches more than 7%, has improved more than 40% than 1 * 7 structure, and has brought convenience, steel strand can coil into the following dish of 2m to the down-hole construction, and is convenient with the tunnel transportation.
Former 1 * 7 steel strand only have two kinds of sth. made by twisting of a kind of structure to (left-hand lay, right-laid), and 1 * 19 structural iron twisted wire can divide the three layers of twist-on-twist (as depicted in figs. 1 and 2) and the ordinary lay (as shown in Figure 3 and Figure 4) of equal diameter, interior filling type twist-on-twist and ordinary lay (as shown in Figure 5), outer filling type twist-on-twist and ordinary lay multiple form of structure such as (as shown in Figure 6) can be selected different structures according to different purposes.
Production technology of the present invention:
5.1 technological process:
Wire rod → check → acid washing phosphorization → check → drawing → the inspection of semifinished product → predeformation → sth. made by twisting strand → after be out of shape → eliminate stress processing → layer twine → check → pack warehouse-in
5.2 wire rod: use high-carbon steel wire rod production.The chemical composition of wire rod and mechanical property see Table 1 and table 2.
5.3 the check of wire rod:
Specimen length: the head of wire rod is taken a sample after cutting a circle again, and length is not less than 500mm.
Mechanical property: every stove is got three samples and is carried out mechanical properties test.
Chemical composition: every stove is got a sample and is carried out the check of chemical composition.
Metal lographic examination: every stove is got a sample and is carried out metal lographic examination.
Surface quality: every stove carries out the check of surface quality by dish.
Qualification determination: meet the wire rod that table 1 and table 2 require through check, provide return on qualification and carry out sign, underproof wire rod is provided deficiency report and is carried out sign.
5.4 acid washing phosphorization:
5.4.1 acid washing phosphorization technological process:
Wire rod → pickling → clear water washes → and water under high pressure → phosphatization → clear water washes → saponification → oven dry
5.4.2 the technological parameter of acid washing phosphorization sees Table 3
Table 3 acid washing phosphorization technological parameter
5.5 check
5.5.1 the inspector will carry out the technology supervision to the operating process operation control point of acid washing phosphorization, when not reaching table 3 regulation, does not allow to wash line, and fills in acid washing phosphorization technology monitoring recording.
5.5.2 the wire rod of inspector after to surfacing carries out surface quality testing and sign, the luxuriant and rich with fragrance son of pink colour cloth is fastened in qualified adding, date, specification, heat (batch) number etc. and the underproof luxuriant and rich with fragrance son of white+black cloth of fixing of signing throw away, and on Bai Feizi, indicate defective reason, scheduling is arranged through production department, notice pickling workshop is returned and is washed, and indicates on the technology monitoring recording.
5.6 drawing process:
5.6.1 drawing process should be carried out according to table 4 regulation
Table 4 process wire drawing process
5.7 the inspection of semifinished product:
5.7.1 whether the inspector should meet process stipulation at linear dimension by the chassis check after succeeding, whether checking process line and surface of semi-finished quality, mould and hull cross situations such as water, the long-pending line height of sliding agent wire drawing jar whether sufficient, wire drawing machine, the speed of a motor vehicle, carry out record.
5.7.2 the inspector should carry out size, surface quality testing by axle (dish), Steel Wire Surface should be smooth, do not have white bright line, crackle, flash, scuffing, ring, corrosion and greasy dirt etc., qualified signs on the luxuriant and rich with fragrance son of paper, underproofly fixes the luxuriant and rich with fragrance son of white+black cloth and indicates defective item and signature.
5.7.3 production department is responsible for every semiproduct sampling, every semiproduct are only got the afterbody sample, and are responsible for fastening the luxuriant and rich with fragrance son of extension and carry out sign.The inspector is responsible for fetching sample and tests, and its diameter deviation and mechanical property should meet regulation in the table 5.
Table 5 semiproduct diameter deviation and mechanical property
5.8 predeformation:
The semiproduct I-beam wheel is put on the strander frame, passes from guide roller, should carry out predeformation by the predeformation smoothing roll and handle before entering noseplate.
5.9 twist with the fingers thigh:
5.9.1 whether the operative employee answers the checkout facility each several part normal before starting production line, determine errorless after, can start production line.
5.9.2 should check the tightness of each I-beam wheel brake band when succeeding, make the laying tension of every steel wire keep uniformity.
5.9.3 when changing the semiproduct I-beam wheel, whether the operative employee at first should examine steel wire in the nineteen semiproduct I-beam wheel and whether meet the wire distribution diameter and require, fasten and hang with qualified check tag, when determining can to change axle after errorless.Must not use without the semiproduct that are up to the standards.
Transplant and produce record 5.9.4 carry out sign.The operative employee should be placed on the operating desk dated time number together with the luxuriant and rich with fragrance son and concentrated being screwed in of metal tag of nineteen semiproduct axle.With the heat (batch) number of every semiproduct correspondence, rolling lot number, reel number, the axle of brigade wheel number, semiproduct diameter, length, order of classes or grades at school, board, date are transplanted on the twisted wire record of production.The steel strand record of production also should be filled in time number, diameter, intensity, linear velocity, the lay pitch.
5.9.5 the twisting technological parameter sees Table 6.
Table 6 steel strand twisting technological parameter
| Steel strand specification mm | Diameter deviation mm | Nominal area mm 2 | Lay pitch mm | Sth. made by twisting to | Linear velocity m/min | |
| Φ18 | +0.4 -0.2 | 208.4 | 198 | Left-hand lay | 30 |
| Steel strand specification mm | Diameter deviation mm | Nominal area mm 2 | Lay pitch mm | Sth. made by twisting to | Linear velocity m/min | |
| Φ20 | +0.4 -0.2 | 270.9 | 220 | Left-hand lay | 25 | |
| Φ22 | +0.4 -0.2 | 312.9 | 242 | Left-hand lay | 25 |
5.10 back deformation process:
Steel strand after the twisting should be aligned through post-former, eliminate twisting stress, and the drafts of post-former should be adjusted according to different size.
The processing 5.11 eliminate stress:
The treatment process parameter sees Table 7 5.11.1 eliminate stress.
The table 7 treatment process parameter that eliminates stress
| Steel strand specification mm | Temperature ℃ | On-line tension kN | Linear velocity m/min | Lay pitch mm | Sth. made by twisting to |
| Φ18 | 430±10 | 150 | 30 | 198 | A left side |
| Φ20 | 440±10 | 155 | 25 | 220 | A left side |
| Φ22 | 450±10 | 165 | 25 | 242 | A left side |
5.11.2, must wipe out without the steel strand of stress relief tempering processing section.
5.11.3 the lay pitch of steel strand is 9～11 times of the steel strand diameter, unless contract has regulation in addition.
5.11.4 the fracture of wire that occurs in the twisting process sprays paint after electricity connects and carries out mark, finally wipes out.
5.11.5 in the manufacturing process, steel strand must be crossed water cooling, compressed air blow drying.Water temperature should be higher than 35 ℃, does not allow the surface that water mark and floating rust are arranged by the twisted wire after the sealing gland.
5.11.6 twisted wire should leave 50～80 ℃ surplus temperature after by sealing gland, dries remaining moisture content, and is good with stretching property of finished product twisted wire, do not produce floating rust and is the principle of regulating pondage.
5.12 layer twines:
5.12.1 the steel strand layer is around should be tight, first floor must be arranged full, and the outermost layer steel strand should be arranged full as far as possible, to guarantee the external packing quality.Steel strand will be handled well end to end, and tangible perk and exposing does not have.
5.12.2 use grinding wheel cutting machine cutting steel strand, each root steel strand can not scatter or can twist with the fingers like a cork and just arrive original position.
5.12.3 intercept finished product steel strand experiment sample by layer around the worker, the long sample of every 1000mm of volume intercepting carries out tension test.
Do not fracture or cross one another irregular steel wire existence 5.12.4 have in the steel strand, the surface does not have and floats rust, oil stain and macroscopic pockmark and mechanical damage.
Twisted wire 5.12.5 eliminate stress after the processing should be not loose.
5.12.6 the stretching property of underrelaxation steel strand: get the steel strand that chord length is 1m, the maximum natural rise of its string and arc is not more than 30mm.
5.12.7 every dish finished steel twisted wire should be formed by one, does not have specific (special) requirements as contract, the weight of every dish steel strand should be controlled at 2～3 tons.
5.13 product inspection:
5.13.1 check finished size, the lay pitch, surface quality, stretching property, the loose situation of head by dish, check steel wire surface quality by the dish dissolution of partnership, defectives such as crackle, rust staining, sand holes must not be arranged, qualified inspector signs on the luxuriant and rich with fragrance son of paper, indicate " surface is qualified ", underproof adding, fastened white+luxuriant and rich with fragrance son of black sign, indicates defective item and signature, indicates the date of inspection etc.Fill in inspection record.
5.13.2 the inspector is responsible for supervising the intercepting of sample, responsible product marking is fastened and is hung and signature.By the dish sampling test.
5.13.3 the diameter and the mechanical property requirements of finished steel twisted wire see Table 8.
| Nominal diameter mm | Intensity rank Mpa | Diameter allowable variation mm | Nominal area mm 2 | Every meter weight | Breaking load kN is not less than | 1% surrender load kN is not less than | Elongation rate % Lo 〉=500mm |
| Φ18 | 1910 | +0.40 -0.20 | 208.4 | 1.636 | 400 | 320 | 7 |
| Φ20 | 1660 | +0.40 -0.20 | 270.9 | 2.126 | 450 | 360 | 7 |
| Φ22 | 1750 | +0.40 -0.20 | 312.9 | 2.456 | 550 | 440 | 7 |
5.13.4 review: the underproof steel strand of preliminary examination should be reviewed in the sky, cooperate the inspector to intercept the reinspection sample by production department, review the underproof sign of should carrying out and change NonConforming Parts Area over to, looking defective the unified circle of arranging the time down of situation wait company reviews, still underproofly be judged to be defectively, carry out control procedure of nonconforming products.
Claims (1)
1. a mine support anchor cable is with the processing method of steel strand, and these steel strand adopt 1 * 19 monofilament to be divided into skin, the three layers of twisting structure in intermediate layer and center, it is characterized in that the processing method of described steel strand may further comprise the steps:
Wire rod → check → acid washing phosphorization → check → drawing → the inspection of semifinished product → predeformation → sth. made by twisting strand → after be out of shape → eliminate stress processing → layer twine → check → pack warehouse-in; Wherein:
The trade mark of described wire rod is the SWRH82B-2 dish, and contained chemical composition is:
Described drawing step is that the wire rod that diameter is respectively Φ 9.0mm, Φ 12.5mm, Φ 13.0mm is reduced to the monofilament that diameter is Φ 3.10mm, Φ 5.5mm, Φ 6.0mm;
The described lay pitch of twisting with the fingers in burst step is respectively, and the intermediate layer is 9D, and skin is 11D, and wherein D is the nominal diameter of steel strand;
Temperature in the described treatment step that eliminates stress is 430～450 ℃, and tension force is 150～165KN.
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|---|---|---|---|
| CN200610161912A CN1963152B (en) | 2006-12-07 | 2006-12-07 | Steel stand for mine supporting anchor cable and method for processing same |
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|---|---|---|---|
| CN200610161912A CN1963152B (en) | 2006-12-07 | 2006-12-07 | Steel stand for mine supporting anchor cable and method for processing same |
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| CN1963152B true CN1963152B (en) | 2010-05-19 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101967632B (en) * | 2010-11-19 | 2013-08-21 | 江苏泰力钢绳有限公司 | Steel wire surface processing method |
| CN108867122A (en) * | 2018-07-26 | 2018-11-23 | 江苏鸿泽不锈钢丝绳有限公司 | （1+6+6/6）The automotive window lifting stainless steel wirerope of structure |
| CN109518499B (en) * | 2018-12-11 | 2022-04-29 | 天津市新天钢中兴盛达有限公司 | 1860 MPa-level prestressed steel strand and manufacturing method thereof |
| CN110449474A (en) * | 2019-08-15 | 2019-11-15 | 兰州斯凯特路桥预应力技术开发有限公司 | A method of steel strand wires are produced with 10mm gren rod |
| CN111112353B (en) * | 2019-12-16 | 2021-10-01 | 天地科技股份有限公司 | Steel strand and manufacturing method and application thereof |
| CN112718894A (en) * | 2020-11-23 | 2021-04-30 | 山东焱鑫矿用材料加工有限公司 | Novel production process for full-length cemented anchor cable body |
| CN112853783B (en) * | 2020-12-23 | 2022-10-11 | 天津市新天钢中兴盛达有限公司 | Mining ultrahigh-elongation prestressed steel strand and manufacturing method thereof |
| CN113814335B (en) * | 2021-09-03 | 2023-05-05 | 中国建筑土木建设有限公司 | Steel strand bundle initial stress adjusting damping system |
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2006
- 2006-12-07 CN CN200610161912A patent/CN1963152B/en not_active Expired - Fee Related
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Inventor after: Kang Hongpu Inventor after: Li Mingyuan Inventor after: Bao Haishan Inventor after: Jin Qingbo Inventor after: Mao Aiju Inventor after: Zhang Enwei Inventor before: Kang Hongpu Inventor before: Li Mingyuan Inventor before: Bao Haishan Inventor before: Jin Qingbo Inventor before: Mao Aiju Inventor before: Zhang Weijun |
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Free format text: CORRECT: INVENTOR; FROM: KANG HONGPU LI MINGYUAN BAO HAISHAN JIN QINGBO MAO AIJU ZHANG WEIJUN TO: KANG HONGPU LI MINGYUAN BAO HAISHAN JIN QINGBO MAO AIJU ZHANG ENWEI |
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Address after: 100013 mining design and research branch of No. 5 Coal Mining Institute, Hepingli Youth Road, Beijing, Chaoyang District Co-patentee after: Li Mingyuan Patentee after: Kang Hongpu Address before: 300182, Fumin Road, Hedong District, Tianjin, No. 21 Co-patentee before: Li Mingyuan Patentee before: Kang Hongpu |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100519 Termination date: 20141207 |
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