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NB/T 11262-2023: Classification indexes and roadside support modes of gob-side entry in coal mine
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| NB/T 11262-2023 | English | 239 |
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Classification indexes and roadside support modes of gob-side entry in coal mine
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NB/T 11262-2023
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Basic data | Standard ID | NB/T 11262-2023 (NB/T11262-2023) | | Description (Translated English) | Classification indexes and roadside support modes of gob-side entry in coal mine | | Sector / Industry | Energy Industry Standard (Recommended) | | Classification of Chinese Standard | D15 | | Classification of International Standard | 73.100.10 | | Word Count Estimation | 12,170 | | Date of Issue | 2023-05-26 | | Date of Implementation | 2023-11-26 | | Issuing agency(ies) | National Energy Administration | NB/T 11262-2023: Classification indexes and roadside support modes of gob-side entry in coal mine---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.
ICS 73.100.10
CCSD15
Energy Industry Standards of the People's Republic of China
Classification indicators and roadside support of coal mine gobside tunnels
Support method
Published on 2023-05-26
Implemented on 2023-11-26
Released by the National Energy Administration
Foreword
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents"
Drafting.
Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents.
This document is proposed by the China Coal Industry Association.
This document is under the jurisdiction of the Science and Technology Development Department of China Coal Industry Association.
This document was drafted by. Shandong University of Science and Technology, Xinwen Mining Group Co., Ltd., China Coal Mining Research Institute Co., Ltd., China
University of Mining and Technology, China University of Mining and Technology (Beijing).
The main drafters of this document. Tan Yunliang, Wang Naiguo, Liu Xiansheng, Wu Yongzheng, Li Guichen, Liu Zhijun, Yu Fenghai, Guo Weiyao, Hu Shanchao,
Zhou Ming, Wei Wen, Fan Deyuan, Ma Zhanguo, Zhang Junwen.
Classification indicators and roadside support of coal mine gobside tunnels
Support method
1 Scope
This document stipulates the indicators and types of roadside support for coal mine gobside roadways, classification methods, commonly used roadside support methods and roadside support technologies.
technical requirements.
This document is applicable to the determination of classification indicators and support methods for gobside support in coal seam longwall mining.
2 Normative reference documents
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations
For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to
this document.
GB/T 23561.7 Methods for determination of physical and mechanical properties of coal and rock Part 7.Determination of uniaxial compressive strength and calculation of softening coefficient
method
DB/T 14 Technical specifications for hydraulic fracturing method and casing core removal method for in situ stress measurement
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
gob-sideentry
A tunnel is dug along the edge of the goaf or a narrow coal pillar (usually 3m~5m wide) is left, or a tunnel is left along the edge of the goaf after mining.
roadway, or a roadway formed by pre-cut roofing along the side of the roadway.
3.2
In the goaf roadway, support structures are artificially constructed along the side of the goaf or walls formed by reinforcing the fallen gangue.
3.3
roofcuttingalonggob-side
In the goaf roadway along the side of the goaf, blasting, hydraulic fracturing and other methods are used to cut off the exposed direct roof.
3.4
The difficulty of directly jacking off caving without support.
3.5
The length of the broken block is basically broken along the side direction of the goaf in the tunnel.
3.6
The ratio of direct top thickness to mining height.
Note. When mining thick coal seams in layers, the mining height is the sum of the mining heights of each layer; when mining with top coal caving, the mining height is the sum of the thickness of coal cutting and coal caving.
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