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

Standard Number: GB/T 42638-2023 (GB/T42638-2023)
Chinese:煤矿井下煤层瓦斯抽采半径直接测定方法 抽采量法
English:The direct measuring method of the coal seam gas drainage radius in coal mine-Method of drainage volume

Effective Date:2023-12-01
Regulatory Authority:
China Coal Industry Association

Issuing Regulatory Authority:State Administration for Market Supervision and Administration,National Standardization Administration of China

Adheres to international standards:N
PDF Downloadable:Y

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