MT/T 1239-2025 Active Industry standards-Coal

MT/T 1239-2025 Classification methods for surrounding rock masses of coalmine development and preparatory roadways

MT/T 1239-2025 Classification methods for surrounding rock masses of coalmine development and preparatory roadways

Publish Date: 2025-06-30 Implement Date: 2025-12-30 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: MT/T 1239-2025

Standard Type: Industry standards

Standard Status: Active

is_force_gb: no

CCS Name: Basic standards and general methods

ICS Name: Mining and excavation

Publish Date: 2025-06-30

Implement Date: 2025-12-30

Pages: 28 pages

Scope

This document specifies the classification indicators, classification methods, and classification steps for the surrounding rock of development and preparation tunnels in coal mines.
This document is applicable to the classification of surrounding rock in development and preparation tunnels of underground coal mines.

Development Information

Word Count: 35 Thousand words Pages: 28 pages

Referenced Standards

GB/T 23561.3-2009 Methods for determining the physical and mechanical properties of coal and rock—Part 3:Methods for determining the block density of coal and rock GB/T 23561.7-2009 Methods for determining the physical and mechanical properties of coal and rock—Part 7:Methods for determining the uniaxial compressive strength and counting softening coefficient GB/T 23561.13-2010 Methods for determining the physical and mechanical properties of coal and rock—Part 13:Methods for determining point load strength index of coal and rock GB/T 35056-2018 Technical specifications for rock bolting in coal mine roadways GB/T 50218-2014 Standard for engineering classification of rock masses GB/T 50266-2013 Standard for test methods of engineering rock mass

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