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GB/T 42638-2023 Active
GB/T 42638-2023 The direct measuring method of the coal seam gas drainage radius in coal mine—Method of drainage volume
Abstract
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.
General Product Information
| Document Type | National standards |
|---|---|
| Standard Status | Active |
| Standard Code | GB/T 42638-2023 |
| CCS | Health, safety, and labor protection |
| ICS | Occupational safety and industrial hygiene |
| Implement Date | 2023-12-01 |
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