NB/T 11638-2024 Active Industry standards-Energy

NB/T 11638-2024 Method for determining the extraction volume of single-layer gas in multi-coal seam by drilling through—Seam holes:measured flow rate method

Publish Date: 2024-09-24 Implement Date: 2025-03-24 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: NB/T 11638-2024

Standard Type: Industry standards

Standard Status: Active

is_force_gb: no

CCS Name: Health, safety, and labor protection

ICS Name: Occupational safety and industrial hygiene

Publish Date: 2024-09-24

Implement Date: 2025-03-24

Pages: 16 pages

Scope

This document specifies the methodological principles, general requirements, preparation before measurement, measurement process, and calculation of the single-layer extraction volume when using the actual flow measurement method to determine the gas extraction volume from multiple coal seams during cross-bed drilling.
This document is applicable to the investigation and determination of the proportion of single-layer gas extraction volume when using cross-bed drilling to pre-extract gas from multiple coal seams in coal mines.