This standard applies to metal rods and accessories of resin anchors used in coal mines and other engineering supports. MT 146.2-2002 Metal rods and accessories of resin anchors MT146.2-2002 Standard download decompression password: www.bzxz.net

Coal Industry Standard of the People's Republic of China
AT146.2—2002
Resin anchor bolts
Metal rods and their accessories
Resin anchor bolts-.-Steel bars an aeressnries200204-08 Issued
State Economic and Trade Commission
2002 09-01 Implementation
MT146.2—2002
The metal technical contents of this standard are mandatory. Foreword
This standard is a revision of MT146.2—1995 <Metal rods and their accessories>: The main technical differences between this standard and MT146.2—1995 are as follows: The inspection rules in MT146.2-1995 have been revised according to the new regulations. According to the standards and test methods of resin anchor rods in advanced foreign countries such as the United States, the order of the high-strength and low-strength bolts has been supplemented and adjusted, and the requirements for the extension rate of the rod teeth have been highlighted. This standard is used in conjunction with MT14G.1--20024. This standard replaces M146.2-1995. This standard is issued by the China Coal Industry Association. This standard is the Standardization Technical Committee of the Coal Industry Special Equipment of the Coal Mine Industry. The drafting units of this standard are: Beijing Institute of Science and Technology of the National Coal Industry Research Institute, Zhunnan Mining Group Synthetic Materials Science Co., Ltd. The main drafters of this standard are Huang Naimun, Ding Quanlu, Xia Baocheng, Fan Shiping, and Yu Xutuo. This standard was issued in 1986. The first revision was in December 1995, and the second revision was in Autumn 2002. This standard is under the jurisdiction of the Coal Mine Special Equipment Standardization Technical Committee of the People's Republic of China and the Equipment Branch of the Coal Mine Special Equipment Standardization Committee.
Coal Industry Standard of the People's Republic of China
Resin Anchor Bolts
Metal Rod Body and Accessories
Resin Bolts - Steel Tarrs and Necesses ||MT 116.2-202
Specification MT 12E.2-19
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, installation, transportation and storage of resin anchor bolts and their accessories.
This standard applies to the metal rod body and accessories of resin anchor bolts used in underground support of coal mines. 2 Reference standards
The clauses contained in the following standards shall become the clauses of the standards through the publication of this standard. When the technical standards are issued, the versions shown are valid. All standards may be revised. The parties to this standard shall discuss the possibility of using the latest versions of the following standards. GB/T228—1987 Tensile test method
G/T3092.21082 Mechanical properties of anchor bolts B/T17010861 Grade A and B for angle screws
MT146.1—2002 Resin anchor bolt straightener
3 Definitions
This standard adopts the following definitions:
3. 1 The body of the threaded steel rod is made of low longitudinal reinforcement or no longitudinal reinforcement thread, and the tail is processed into an end thread that can be threaded. 3.2 trillion rod body arlat:rs
In the steel connecting dog part hot processing considerations certain trends in the deep flower evenly head · product part Jianggong sense Chuan Shang device mother contract 4 product classification
4.1 metal rod body mainly stock amount is relatively large steel rod body and reward steel twist rod up. 4.1.1 The relationship between the step number and the obtained parts structure is shown in Figure 1. The National Economic and Trade Commission approved it in August 2002 and approved it in September 2002. 1 Rod 2 Tray 3 Ball pad 4 Group blue solid 15 Step: 1 - a delivery length - the previous length is changed (8) 120mm Figure 1 The steel rod body without its accessories is shown in Figure 2. The rod body length is the original length of the head - the length of the head is D - the type of the rod body is a length folded from the staggered deformation point to the thickness of the head 2 twist Rod body
4.2 The specifications of the support body shall comply with the requirements of Table 1.
Table 1 Rod Specifications
Complementary Diameter
System: + indicates the length that can be used
5 Technical Requirements
5.1 Support Body
5.1.1 The support body with a service pressure greater than 335MPa shall be selected. When the support of the sick foot is required, the support body with a service pressure greater than 235MPa can also be used.
5.1.2 Rod body 8: The service rate shall not be less than 15%5.1.3 The size rate and tolerance of the support body shall comply with the requirements of Table 2. Diameter
Length
Height of the head
Head length:
Effective length without screw
The distance between the support and the starting point of the anchor head is two.
Straight grid D
Degree of twist of left hidden twist
MT146.2—2002
Table 2 Requirements for the size of twisted shrimp forest
Diameter)—~mm
/15d, but not less than 240mm
4,-80-~120 ::0
c=1050 mm
D,=D(station)—(4·S>TITI
51.4 The paving force shall comply with the current provisions of MT14%.1. 5.15 The straightness of the rod body ≤2mm/m
5-2 The frequency twist of the tail of the seed body
The operating limit of the part should not be less than the rod body load recommendation, usually
±10 mm
=5 ern
The torque nut should be used first. When using the six-force nut, its technical specifications should comply with the provisions of GB/617 and CB/T3098.2.
5.4 Pin pallet
Spiral pallet should be used first. Its bearing capacity should not be less than the load of the rod body. The standard size should not be less than 100mm×100mm or 100Jme.
When using a flexible material as a pallet, its limit load should be more than 1.5 times the rod body load. 6 Test method
6. 1 Dimensions of poles and pallets
Measure the geometrical dimensions of poles and pallets with a 1mm steel ruler, a ruler and a caliper: Check the straightness of the poles with a feeler gauge
62 Strength and elongation ratio
Measure the length and elongation ratio of the poles according to the relevant provisions of GB/F22B. 6.3 Bearing capacity of the poles, nuts and pallets 6.3.1 Use a universal material testing machine to measure the strength (see MT146.1- 2002 Figure 1 and Figure 3 of this standard), G.3.2 During the test, the universal material test machine! The upper clamp is a tension frame, and the lower clamp is used to test the rod body (see Figure 3) MT146.2--2C02
1-hit: 2 two sections, 3-ball pad: 4-ban 5-find: 6-position force frame pad pin plate
6.3.3 During the cutting, at a speed of 10~20kN/min, step loading is used for the linear grid and micro-break. , or the tail needs to be operated, the mother magnet is damaged, and the test when the cushion pressure reaches 30% of its height depends on him. 6.1 Quality Gram
According to the specified test of MT145.1,
7 Inspection Rules
7.1 Product inspection is divided into factory inspection and type test. Factory inspection is conducted by the manufacturing quality inspection department, and type inspection is conducted by the quality inspection agency. The factory inspection and type inspection items are shown in Table 3. Table: Inspection Items
Unqualified Classification
Dimensions of the support and accessories
Strength and safety
Analysis of the Ministry of Civil Affairs Screw strength test
Bearing force of the support plate
Anchor force
Technical requirements
2.2.5.2.5.4
Test is a test for the inspection of the product
Factory inspection and type registration, judgment rules, should comply with the provisions of 7.2 and 7.3 in MT146.12002.
Good packaging number mark, storage and transportation
B.1 Each standard body is equipped with at least one nut, and every 5 rods are a group, which are packed and shipped in a qualified certificate. The production line is indicated on the certificate, and it is also packed according to the supply contract requirements. wwW.bzxz.Net
82 with 10 replacement pallets are packed into one piece.
MT 146-2—2002
3 The rod body should be stored in a dry place, the solid section should not be contaminated with oil, the screw section should be protected and equipped, and care should be taken during transportation to prevent the rod from being damaged. 5
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