GB/T 42638-2023 Active National standards

GB/T 42638-2023 The direct measuring method of the coal seam gas drainage radius in coal mine—Method of drainage volume

GB/T 42638-2023 The direct measuring method of the coal seam gas drainage radius in coal mine—Method of drainage volume

Publish Date: 2023-05-23 Implement Date: 2023-12-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 42638-2023

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Health, safety, and labor protection

ICS Name: Occupational safety and industrial hygiene

Publish Date: 2023-05-23

Implement Date: 2023-12-01

Pages: 15 pages

Scope

This document describes the instrumentation and equipment, measurement process, and determination of measurement results for directly determining the gas extraction radius of coal seams in coal mines.
This document is applicable to the determination of the gas extraction radius in coal mines using longitudinal drilling, cross-sectional drilling, and longitudinal directional long drilling.

Development Information

Word Count: 31 Thousand words Pages: 15 pages

Referenced Standards

GB/T 1227-2002 Accurate pressure gauge GB/T 1227-2010 Accurate pressure gauge GB/T 1227-2017 Accurate pressure gauge GB/T 15663.8-1995 Terms relating to coal mining—Mine safety GB/T 15663.8-2008 Terms relating to coal mining—Part 8:Mine safety GB/T 23250-2009 The direct method of determining coalbed gas content in the mine MT 28-1994 Light Interference Methane Detector MT/T 28-2005 Optical interference methane sensor

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