NB/T 11027-2022
Specifications for drawing prediction maps for coal mine outburst prevention (English Version)
- Standard No.
- NB/T 11027-2022
- Language
- Chinese, Available in English version
- Release Date
- 2022
- Published By
- Professional Standard - Energy CN / NB
- Latest
- NB/T 11027-2022
- Introduction
Interpretation of the core content of the standard
Definition of burst prevention prediction map
A professional drawing based on the coal seam gas geological map, which comprehensively reflects the coal seam occurrence, gas geology, tunnel layout, burst prevention system and other elements within the scope of the mining project, and is used to guide on-site burst prevention work.
Key Technical Specifications
Working Face Type Forecast Range Scale Requirements Update Frequency Stone Gate Coal Uncovering Normal Distance 10m to 7m Plane 1:500
Section 1:20024-hour Mapping Coal Lane Excavation 150m in front + 20-30m on both sides 1:1000 or 1:500 Updated every ten days Coal mining working face 100m range in front 1:1000 or 1:500 Monthly review
Hazardous area classification standards
- Non-outburst area: yellow 3mm frame line (P<0.74MPa)
- Outburst danger area: orange 3mm frame line (0.74≤P<2MPa)
- Severe danger area: red 5mm frame line (P≥2MPa)
Implementation points
Drilling Engineering Management
The specification requires that six types of boreholes be marked: geological exploration holes, stone gate coal pre-extraction holes, through-layer pre-extraction holes, bedding holes, effect inspection holes and surface extraction wells, and three-dimensional coordinate associations be established.
Dynamic update mechanism
The paper version of the prediction map must be updated within 24 hours after each prediction, and the electronic version must be updated at least once every ten days. Major geological changes must be corrected in real time.
Background of Standard Evolution
This specification systematically integrates the GB/T 38110 graphic symbol standard and the GB/T 50593 mine mapping standard for the first time, and innovatively proposes the separation of annotation points and annotation symbols technology to provide a standardized interface for digital mine construction.
NB/T 11027-2022 Referenced Document
- GB/T 38110 Graphical symbols for the technical documentation of coal mining
- GB/T 50593 Standard for drawings undarground mining
NB/T 11027-2022 history
- 2022 NB/T 11027-2022 Specifications for drawing prediction maps for coal mine outburst prevention
