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Tunnel metallic stent series
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MT 143-1986
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PDF similar to MT 143-1986
Basic data | Standard ID | MT 143-1986 (MT143-1986) | | Description (Translated English) | Tunnel metallic stent series | | Sector / Industry | Coal Industry Standard | | Classification of Chinese Standard | D98 | | Word Count Estimation | 50,594 | | Date of Issue | 10/29/1986 | | Date of Implementation | 12/1/1986 | | Summary | This standard specifies the current nine kinds of aircraft commonly used type of coal, 131 kinds of specifications of the roadway metal stents, which includes a rigid stand trapezoid, trapezoidal, semi-circular arch, arch straight leg three hearts, three heart arched legs, horseshoe, Round, square and long annular ring retractable stand and gives the structure of the stent and related parameters. Appendix A gives the 25U, 29U and 36U steel stent may shrink connectors - the card cable diagrams and main dimensions. Appendix B lists the applicable conditions of the roadway metal stents. The standard for coal production, design, manufacturing and research departments. | MT14: ---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Tunnel metallic stent series
Ministry of Coal Industry Standards
MT/T 143-86
Laneway metal bracket series
Published on October 29, 1986
1986-12-01 implementation
Published by the Ministry of Coal Industry of the People's Republic of China
Contents
1 Symbol description of laneway metal bracket series (see Table 1) 2
2 trapezoidal rigid support (see Figure 1, Table 2) 3
3 trapezoidal retractable bracket (see Figure 2, Table 3) 4
4 Semi-circular arch retractable support (see Figure 3, Figure 4, Figure 5, Table 4) 6
5 Three-heart arch straight leg retractable stent (see Figure 6, Figure 7, Figure 8, Table 5) 9
6 Tri-center arched leg retractable stent (see Figure 9, Figure 10, Table 6) 12
7 Horseshoe-shaped retractable bracket (see Figure 11, Figure 12, Table 7) 14
8 Round retractable support (see Figure 13, Figure 14, Figure 15, Table 8) 16
9 Square ring retractable bracket (see Figure 16, Table 9) 19
10 Long ring retractable bracket (see Figure 17, Table 10) 21
Appendix A Retractable metal bracket card cable, back plate, tie rod (supplement) 23
Appendix B Table of applicable conditions for retractable metal brackets (reference) 28
Laneway metal bracket series
This standard specifies 9 types of racks and 131 specifications of roadway metal supports commonly used in coal mines in China.
Stent, trapezoidal, semicircular arch, three-heart arch straight leg, three-heart arch leg, horseshoe, round, square ring and long ring, and
The structure diagram and related parameters of the bracket were given. Appendix A gives the connection parts of 25U, 29U and 36U steel retractable brackets --- card cable diagram
And main dimensions. Applicable conditions for roadway metal supports are listed in Appendix B.
This standard can be used by coal production, design, manufacturing and scientific research departments.
Roadway metal bracket model compilation method.
The laneway metal bracket model is composed of Chinese Pinyin letters and Arabic numerals, and the composition sequence is as follows.
Modeling example
Appendix A
Retractable metal bracket card cable, back plate, tie rod
(Supplement)
Cards and cables with retractable metal brackets have a double-slot plywood shape with limited blocks.When using them, they should be selected according to the U-shaped steel model.
Use 25U, 29U, or 36U steel brackets to clamp cables. The card cable type should preferably use the ear positioning card cable shown in Figure A1, Figure A2, and Figure A3.
Several card cables (Figure A4 to Figure A9) are used as transitional card cables.
Appendix B
Table of applicable conditions for retractable metal brackets
(Reference)
The table is classified into ten categories according to the current mining face and various supporting equipment used in the coal mine in China, and combines the scalability
The frame type of the metal stent gives the applicable conditions of various forms of retractable metal stent and the allowable approach amount and final section of the stent
Refer to when the unit uses the bracket.
Additional information.
This standard was proposed by the Production Department and the Technology Development Department of the Ministry of Coal Industry.
This Standard was drafted by the Beijing Research Institute of Coal Science.
The main drafters of this standard are Liu Chongyue and Yao Shejun.
This standard is entrusted to Beijing Coal Research Institute of Coal Science Research Institute for interpretation.
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