煤矿加固煤岩体用高分子材料热安全性能测试方法
Methods to measure the thermal safety properties of polymer material for consolidating coal and rock in mine
2017-03-28
DIN 22021
Investigations of the raw material in hard-coal-mining; microscopical examinations of rocks
硬煤开采的原材料调查；岩石的显微镜检查
1985-07-01
DIN 22024
Investigations of the raw material in hard-coal-mining; determination of tensile strength on solid rock
硬煤开采的原材料调查；固体岩石抗拉强度的测定
1989-02-01
DIN 22012
Investigations of the raw material in hard-coal-mining; macropetrographic classification and topographic survey of hard-coal and host rock
硬煤开采的原材料调查；硬煤和寄主岩的宏观岩石学分类和地形测量