Some standard content:
ICS 73. 100. 10
Registration No.: 10301--2002
Coal Industry Standard of the People's Republic of China
MT218--2002
Cement Anchor Bolts
Cement Anchor Bolts--Bars
Published on April 8, 2002
National Economic and Trade Commission
Implemented on September 1, 2002
MT218--2002
All technical contents of this standard are mandatory. Former
This standard is a revision of MT218-1990 <Cement Anchor Rod Body>. The main technical differences between this standard and MT218-1990 are: in the bar body specification category, the bar body that is rarely used is cancelled, the bar body specifications are adjusted, and the product models are added. The inspection rules have been adjusted, and the percentage sampling has been changed to counting sampling.
This standard is matched with MT219-2002 "Cement Anchor Roll-type Dislocation Agent". This standard was implemented on September 1, 2002; this standard replaces MT218-1990 from the date of entry into force. This standard was proposed by the China Coal Industry Association. This standard is under the jurisdiction of the Coal Industry Coal Mine Special Equipment Standardization Technical Committee. The drafting unit of this standard: Beijing Well Construction Research Institute of the China Coal Research Institute. The main drafters of this standard: Tu Linan, Guo Aimin, Zhang Lai De, Guo Jianming, Huang Aiyue. This standard was first issued in October 1990 and revised for the first time in April 2002. This standard is entrusted to the Coal Industry Coal Mine Special Equipment Standardization Technical Committee Shaft and Tunnel Equipment Branch for interpretation. 1. Scope
Coal Industry Standard of the People's Republic of China
Cement Anchor Bolts-Bars
Cement Anchor Bolts-Bars
MT 218-2002
Replaces MT218-1990
This standard specifies the product classification, technical requirements, test methods, inspection rules and product marking, packaging, transportation and storage of cement anchor bolts.
This standard applies to cement anchor bolts for mines and other engineering projects. 2. Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T196—1981 Basic dimensions of common threads (diameter 1~600mm) GB/T197-1981 Tolerances and fits of common threads (diameter 1~355mm) 7 Metal tension test methods
GB/T228--1987
GB/T3098.2—1982 Mechanical properties of fasteners Nuts
GB/T6170--1986 Type I hexagonal nuts—Grades A and B GB/T10111—1988 Random sampling method using random numbers Isolated batch counting sampling inspection procedures and sampling tables GB/T15239—1994
GB/T15780-1995
Test methods for physical and mechanical properties of bamboo
MT146.1—2002 Resin anchor rods
Anchoring agent
MY 146.2—2002
Resin anchor
Metal rod and its accessories
MT2192002 Cement anchor roll anchor
3 Definitions
This standard adopts the following definitions.
3.1 Curved end bar
The end is processed into a certain specification of curved shape, welded with a retaining ring, and the tail is processed into a threaded round steel rod. 3.2 Small twisted rod double twisted bar The end is hot-processed into a certain specification of a narrow double twisted shape with a left-hand rotation of 360°, welded with a retaining ring, and the tail is processed into a threaded round steel rod. 3.3 Ordinary twisted rod twisted bar The end is hot-processed into a certain specification of a single twisted shape with a left-hand rotation of 180°, welded with a retaining ring, and the tail is processed into a threaded round steel rod. 3.4 End disk bar
The end is heat-processed or welded into a disc-shaped cover, and has a movable retaining ring, and the tail is processed into a threaded round steel bar. 3.5 Threaded steel bar thread deformed bar The end is beveled into an acute angle, and the tail is processed into a thread or the entire length is a threaded steel bar with a threaded end. Approved by the State Economic and Trade Commission on April 8, 2002, and implemented on September 1, 2002
MT 218—2002
3.6 Pointed end bamboo bar The end is processed into a pointed shape according to certain specifications, and is a bamboo bar made of two pieces of bamboo boards nailed together. 3.7 Sawtooth bamboo bar The end is processed into a serrated shape according to certain specifications, and is a bamboo bar made of two pieces of bamboo boards nailed together. 4 Product classification
4.1 The product classification and code of the rod used in conjunction with the cement anchor roll anchor are shown in Table 1. Table 1 Product classification and code
Bent type
Small twist type
Yutong twist type
End plate type
Threaded steel type
End tip type
Serrated type
4.2 The specifications of various rods shall comply with the provisions of Table 2. Code
Table 2 Specifications of various rod bodies
Rod diameter
16, 18
18 (rebar)
20 (rebar)
Section 8×30 two pieces matched
Note: For other rod bodies with special requirements, the appropriate rod length shall be determined according to user requirements
1000~1700
1500~2200
2000~2400
1000~1500
Length of anchoring end
250~280
Determined according to the need for staggered length
300~400
4.3 The product model is composed of the Chinese phonetic prefix of the cement anchor rod body, the product type code and main parameters. MSG
Length, mm/100
Diameter, mm
Rod type code
Cement anchor rod
Model example:
The bent steel rod with a rod diameter of 16 mm and a rod length of 1700 mm is marked as: MSGGW16/175Technical requirements
5.1 Steel rod
5.1.1 Main properties of the rod
Suitable installation method
Direct driving
Direct driving
Rotary stirring
Steel pipe stamping
Direct driving
Direct driving
Direct driving
Tail thread length
Tail wedge length>200
MT 2182002
Round steel with a yield strength greater than 235MPa is used for the rod body. If necessary, threaded steel with a yield strength greater than 335MPa or other types of high-strength steel may also be used. The elongation s of the rod body should not be less than 16%. The thread at the end of the rod body should preferably be rolled, and the strength of the thread section should not be less than the yield strength of the rod body.
5.1.2 Dimensions and tolerances
5.1.2.1 Rod body
Rod length deviation: ±10mm;
Rod diameter deviation: ±0.2mm;
Rod straightness deviation: 3.0mm/m;
Rod tail thread size and deviation: should comply with the provisions of GB/T196 and GB/T197. 5.1.2.2 Nut
The nut specifications should match the thread at the end of the rod body, and its technical conditions should comply with the provisions of GB/T3098.2, and its dimensions and deviations should comply with the relevant provisions of GB/T6170.
5.1.2.3 Rod end
The dimensional deviation of the processed part of the rod end shall comply with the provisions of Table 3 to Table 6 and Figure 1 to Figure 4. The length of the threaded section is 80~120mm.
Dimensions and deviations of bent rod end
(Drilling diameter-5)±1
(Drilling diameter-5)±1
Figure 1 Schematic diagram of bent rod
Rod diameter+5
Spot welding device
Dimensions and deviations of small twist rod end
Spot welding rate
The cross-sectional area of the twist section shall not be less than 80% of the rod area, and the twist is 360°±10° to the left. Figure 2 Schematic diagram of small twist rod
(Drilling diameter-5)±1
(Drilling diameter-5)±1
The end is hot-processed into a whole
or with additional pads Round welding
MT218-2002
Table 5 Dimensions and deviations of the end of the ordinary twisted rod c
Figure Spot welding is firm
The cross-sectional area of the twist section shall not be less than 80% of the cross-sectional area of the rod, the twist is left-handed 180°±10°Figure 3 Schematic diagram of ordinary twisted rod
Table 6 Dimensions and deviations of the end of the end plate type rod
a+2 or to a
Active file
Figure 4 Schematic diagram of the end plate type rod
5.1.2.4 Threaded steel rod end
The end of the threaded steel rod is generally not processed, only one end is beveled when cutting, and the end bevel angle should not be greater than 45°. The length and strength requirements of the tail thread section are the same as 5.1.2.3. When the strength is fully guaranteed, other thread forms are allowed. 5.2 Bamboo pole
5.2.1 Main properties of the pole
The pole should be made of 5-6 year old bamboo cut in the current year, with a bamboo thickness of not less than 8mm, a moisture content of 10% to 14%, a tensile strength of not less than 120MPa, and no frog holes or deformation. When the relative humidity at the place of use is greater than 90%, the end of the pole should be treated with antiseptic.
5.2.2 Dimensions and deviations
The dimensions and deviations of the rod end shall comply with the provisions of Table 7 and Figure 5. Table 7 Dimensions and deviations of the end of the bamboo rod with a tip
30±20
MT218—2002
Figure 5 Schematic diagram of the bamboo rod with a tip
The rod is made of two pieces of bamboo, with the bamboo skin facing inward and slightly scraped, and the flange removed at the bamboo joints. It is staggered and nailed with small round nails, with a nail spacing of (200~250)mm. The tail is not nailed within a length of 200mm to prepare for the block when the support board is installed. Rod length deviation: ±15mm.
The end of the sawtooth rod is the end of the bamboo rod with 2~3 teeth added in sequence, the tooth length is the same as c, and the tooth depth is the same as d. The tolerance of the corresponding parts is the same as that of the tip type.
The bamboo rod is only suitable for drilling holes with a diameter of 42mm. 5.3 Anchor palletwwW.bzxz.Net
Butterfly pallet is preferred, its bearing capacity should not be less than the yield load of the rod body, and the specification size should not be less than 100mm×100mm or 100mm. When brittle materials are used as pallets, its ultimate load should be more than 1.5 times the yield load of the rod body. 6 Test method
6.1 Dimensions and appearance quality
6.1.1 Measuring tools
Steel plate ruler: range 0~500mm, graduation value 1mmzSteel tape measure: range 0~2000mm, 0~3000mm, graduation value 1mmVernier caliper: range 0~150mm, graduation value 0.02mmzMeasuring platform: table length 2500mm, width 300mm, flatness 1mm/mzFeeler gauge: range 0~10mm, graduation value 0.5mm. 6.1.2 Measurement method
6.1.2.1 Length, diameter and straightness of the rod a) Place the rod on the measuring platform and use a steel tape measure to measure the length of the rod, accurate to 1mm. b) Use a vernier caliper to measure the diameter of the support body, measure three values in the middle and both ends of the rod, and take the arithmetic mean of the three measured values, accurate to 0.02mm.
c) Place the straight rod part of the rod on the measuring platform, use a steel tape measure to measure the length of the straight rod part, rotate the rod along the axial direction, and use a feeler gauge to measure the maximum bending amount in each direction. Take the largest of the measured values and convert it to the straightness of the straight rod part, accurate to 0.5mm/m. 6.1.2.2 Appearance and size of the end processing part 8) Use a vernier caliper and a steel plate ruler to measure the size of each processing part of the end. b) Other appearance quality is judged by visual inspection. 6.2 Mechanical properties
6.2.1 Mechanical properties test of steel rod
6.2.1.1 Test instrument
a) Testing machine: It shall comply with the provisions of 6.1 in GB/T228-1987. b) Extensometer: It shall comply with the provisions of 6.2 in GB/T228-1987. 6.2.1.2 Test steps
MT218-2002
a) Preparation of test piece: Cut two sections from the rod, the length of which shall not be less than (10 times the rod diameter + 200mm); b) Test load increase rate: Carry out in accordance with the provisions of 7.1 of GB/T228-1987; c) Determination of service point: Carry out in accordance with the provisions of 8.5 of GB/T228-1987; d) Tensile strength: Carry out in accordance with the provisions of 8.8 of GB/T228-1987; e) Elongation: Carry out in accordance with the provisions of 8.10 of GB/T228-1987. 6.2.1.3 Calculation of results
Carry out in accordance with the provisions of 9.10 of GB/T228-1987 and 6.2.1.2c), d), and e) of this standard. 6.2.2 Test of mechanical properties of bamboo pole
6.2.2.1 Test apparatus
Same as 6.2.1.1a of this standard).
6.2.2.2 Test steps
a) Preparation of test specimens: Cut a section of the middle of two bamboo poles respectively, take a single piece of bamboo board as the test specimen, the length of the test specimen is 400mm, and the surface of the bamboo skin within the length of 100mm at both ends is engraved with a cross-cutting notch of about 0.5mm in depth, and the test specimen is numbered. b) Tensile test: Carry out in accordance with the provisions of 5.8.3 of GB/T15780-1995. c) Calculation of results: The tensile strength is calculated according to formula (1), accurate to 0.1MPa. Crh
Where: dynamic
Tensile strength of bamboo rod (along the grain), MPa; P,--maximum load, N;
a--effective section length of specimen, mm;
br--effective section width of specimen, mm.
Take the arithmetic mean of the test results of two specimens. 6.3 Bearing capacity of the thread, nut and tray at the end of the rod body P
6.3.1Use a universal material testing machine with a special tension frame (see Figure 1 in MT146.1-2002 and Figure 6 of this standard). (1)
6.3.2During the test, the upper jaw of the universal material testing machine clamps one end of the tension frame, and the lower jaw of the testing machine clamps the rod body at the end of the anchor rod (see Figure 6). 1-rod body, 2-adjustment plate, 3-ball pad; 4-nut: 5-tray 6-tension frame bottom pad Figure 6 Anchor tail, nut and tray test device 6
MT 2182002
6.3.3 When loading, gradually load at a speed of 10-20kN/min until the rod yields or breaks, or the tail thread or nut is damaged, or the tray is compressed to 30% of its height. 7 Inspection rules
7.1 Product inspection is divided into factory inspection and type inspection. Factory inspection is carried out by the quality inspection department of the manufacturer. Type inspection is carried out by the product quality supervision and inspection agency.
7.2 Inspection items:
Product factory inspection and type inspection items are shown in Table 8. 3 Inspection items
Inspection items
Dimensions and appearance
Mechanical properties of rod body
Bearing capacity of support plate
Unqualified classification
Technical requirements
5.1.2,5.2.2
5.1.1,5.2.1
Test methods
7.3 Factory inspection:
7.3.1 Factory inspection samples shall be randomly selected from the submitted inspection batches in accordance with the provisions of GB/T10111. Factory
Inspection category
7.3.2 Sampling plan:
Use the one-time sampling plan mode B in GB/T15239-1994, limit quality LQ=32, special inspection level S3, batch N=1000. The sampling plan is found in the relevant table of GB/T15239: sample size n=13
Qualified judgment number A=1
Unqualified judgment number R. =2
7.3.3 Judgment rules:
The judgment rules for qualified or unqualified batches shall be implemented in accordance with the provisions of 5.11.1 of GB/T15239. 7.4 Type inspection:
The sampling and judgment rules for type inspection shall comply with the provisions of 7.4 of MT219. 8 Marking, packaging, transportation, storage
8.1 Steel rod body
8.1.1 Each rod is equipped with a nut. Generally, 10 rods are grouped together and tied with wire. A small wooden sign should be attached to indicate the rod diameter and length. During storage and transportation, care should be taken to protect the rod tail thread from damage. 8.1.2 The rod should be placed in a dry place. The anchoring section is strictly prohibited from being stained with oil. Anti-rust measures should be taken at the thread. 8.2 Bamboo rod
8.2.1 Every 10 rods are bundled into a group and tied with wire. A small wooden sign should be attached to indicate the rod specifications. During transportation, care should be taken to protect the rod end from damage.
8.2.2 The rod should be stored in an environment with a relative humidity of 30% to 50%. It should not be exposed to the sun and the anchoring section should not be stained with oil. Products that implement safety signs should have corresponding safety signs and numbers. 7
MT 2182002
ISBN 7-5020-1997-9
87502\019979
Coal of the People's Republic of China
Industry Standard
Cement Anchor Rod Body
MT218—2002
Published by China Coal Industry Press
(No. 35, Fenyaoju, Zhiyang District, Beijing 10029)Beijing Fangshan Hongwei Printing and Drama Factory
Published by Beijing Publishing House of Xinhua Bookstore
Format 880×1230mm1/16 Printing Sheet 5/8
Word Count 13,000 Words
Print Count 1-345
First Edition August 2002
First Printing August 2002
ISBN 7-5020-2193-0/F652.2
All rights reserved. Violators will be prosecuted
If there are any quality problems such as missing pages, reversed pages, or loose pages in this book, our company will be responsible for replacing it.
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.