GB/T 42638-2023

Active

The direct measuring method of the coal seam gas drainage radius in coal mine—Method of drainage volume

煤矿井下煤层瓦斯抽采半径直接测定方法抽采量法

Standard Type

GBT

ICS

13.100

CCS

D09

Status

现行

Issue Date

2023-05-23

Implementation

2023-12-01

Responsible Dept

中国煤炭工业协会

Drafting Unit

N/A

🔗 Related Standards / 同类标准

GB/T 5082-1985 The commanding signal for lifting and moving GB/T 11660-1989 Health protection zone standard for ironmaking plants GB/T 11659-1989 Health protection zone standard for lead storage battery plants GB/T 11657-1989 Health protection zone standardfor copper smeltery (closed blast furnace type) GB/T 12331-1990 Classified standard of operation with exposure to toxic chemicals in the workplace GB/T 14441-1993 Safety code for painting--Terminology GB/T 14440-1993 Classification of works in cold environment GB/T 14439-1993 Classification of works in cold water