GB/T 2007.1-1987
Active
NB/T 11900-2025
Active
Industry standards-Energy
NB/T 11900-2025 The technical requirements for pneumatic drilling of directional strata-oriented gas drainage drill holes in soft coal seams in the underground mining operation
NB/T 11900-2025 The technical requirements for pneumatic drilling of directional strata-oriented gas drainage drill holes in soft coal seams in the underground mining operation
Price:
$ 20.00
Basic Information
Standard Code:
NB/T 11900-2025
Standard Type:
Industry standards
Standard Status:
Active
is_force_gb:
no
CCS Name:
Health, safety, and labor protection
ICS Name:
Mining and mineral products comprehensive
Publish Date:
2025-09-28
Implement Date:
2026-03-28
Scope
This document is applicable to the pneumatic construction of directional seam gas extraction boreholes in coal seams with a solidity factor of 0.3≤ f ≤1.0
Development Information
Related Standards
GB/T 2007.2-1987
Active
GB/T 2007.2-1987 General rules for the sampling and sample preparation of minerals in bulk Sample preparation by manual method
GB/T 2007.3-1987
Active
GB/T 2007.3-1987 General rules for the sampling and sample preparation of minerals in bulk—Experimental method for evaluation of quality variation
GB/T 2007.4-1987
Replaced
GB/T 2007.4-1987 General rules for the sampling and sample preparation of minerals in bulk—Experimental methods for checking the precision
GB/T 2007.5-1987
Replaced
GB/T 2007.5-1987 General rules for the sampling and sample preparation of minerals in bulk—Experimental method for checking the bias of sampling
GB/T 2007.6-1987
Active