1) fragmentation of top coal
顶煤破碎特征
2) top coal smash
顶煤破碎
1.
The effect of top coal smash result in different manners of moving support, pressure relief and “dower support—draw support—prop up” and sliding advance of support, are analyzed with contrast.
以放顶煤开采现场实测为基础 ,着重探讨了顶煤的变形特征、顶煤变形与支承压力的关系 ;对比分析了“卸载降架—拉架—支撑”和“带压移架”不同移架方式对顶煤破碎效果的影响 。
3) broken coal roof
破碎煤顶
1.
The truss cable support technology at the large cross-section set-up room with thick and broken coal roof
大断面厚层破碎煤顶综放切巷桁架锚索支护技术
4) top coal crushing mechanism
顶煤破碎机理
1.
The authors has expounded the top coal crushing mechanism and reasonable determination of caving coal height in roof caving workface,which helps to determine the feasibility of roof caving and complete mining according to the thickness of top coal and the degree of softness and hardness.
主要阐述了放顶煤工作面顶煤破碎机理及放煤高度的合理确定;针对放顶煤工作面的顶煤厚度和煤质软硬程度,正确判定顶煤是否具有可放性,为工作面能否一次采全高提供科学依据。
5) characteristics of the fragment
破碎块度特征
6) crush zone characteristics
断层破碎带特征
1.
And the concrete position & occurrence & scale are determined by the crush zone characteristics.
本文根据广州市轨道交通二、八号线延长线工程初步勘察阶段、江泰路站详细勘察阶段及江泰路站断裂补充勘察中取得的有关断层破碎带资料,归纳出断层破碎带的各种不同特征,并根据断层破碎带特征,较为准确地确定了断层破碎带的具体位置、产状及规模。
补充资料：综采放顶煤
综采放顶煤：厚煤层煤炭开采技术之一。把原来分层开采的煤炭，一次采完。方法是，在煤层底部按传统方法开采，使上面的煤炭在矿压的作用下，自动落下来。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条