GB/T 40259-2021 in English
VALIDGeneral specification for supporting quality of longwall face
- Issued on:2021-05-21
- Implemented on:2021-12-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$243.00
《GB/T 40259-2021综采工作面支护质量检测技术条件》由603（中国煤炭工业协会）归口，主管部门为中国煤炭工业协会。
Introduction
Analysis of the core content of the standard
This standard specifies the full-process technical requirements for quality inspection of support for fully mechanized mining working faces, including key technical indicators such as sensor accuracy (inclination ±0.1°, pressure ±0.1MPa), system stability (7 days of continuous operation), and explosion-proof grade (GB 3836 series).
Comparison of technical frameworks
| Dimensions | Requirements of this standard | General requirements of the industry |
|---|---|---|
| Detection accuracy | ±0.1° (inclination) | ±0.5° |
| Environmental adaptability | -40℃~60℃ storage | -20℃~50℃ |
| Data transmission | WirelessMulti-function display terminal Distance ≥50m | 30m |
Analysis of key technologies
Support detection system architecture
The system consists of inclination sensor, pressure sensor, multi-function display terminal, etc., and realizes data collection through wireless/wired hybrid networking. Typical application case: After adopting this system in a certain mining area, the accident rate of support toppling was reduced by 62%.
Explosion-proof performance requirements
It is necessary to meet GB 3836.1~4 and GB 3836.9 standards at the same time, including the triple protection mechanism of flameproof enclosure "d", increased safety type "e", and intrinsic safety type "i".
Standard evolution background
With the intelligent development of fully mechanized mining working faces, traditional manual detection methods can no longer meet the accuracy requirements. This standard incorporates wireless sensor network technology into the specification for the first time, solving the problem of coordinated monitoring of hydraulic support groups.
Implementation suggestions
- Preferably use tilt sensors with a dual-axis ±90° range
- A 72-hour stability pre-test is required when the system is deployed
- Regularly calibrate the overload protection function of the pressure sensor (2 times the full scale)
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