breaking of coal

基本解释

During the entire process of breaking large coal cinder, the various working procedure meet safety and usefulness.
在破碎大煤块的整个过程中，各个工序满足安全性和实用性的统一。
Dealing with the practice of Jincheng Mining Bureau, the effect of breaking large coal on the washing technique and benefit is discussed, some helpful opinions are suggested.
结合晋城矿务局实际，论述了选前大块原煤的破碎对洗选工艺及效益的影响，并对破碎作业提出了一些建设性意见。
By means of some parameters that reflect breaking strength of coal body structure, changing features of coal body structure at No. 3 coal bed of No. 1 mine in Shizuishan Mine Area are studied.
采用反映煤体结构破坏程度的若干宏观与测试参数，研究了石嘴山一矿井田主采三层煤的煤体结构变化特征。