1) top coal activities
顶煤活动
2) movable mechanism of caving
顶煤活动机理
3) movement of top coal
顶煤活动规律
4) roof(top coal)moving law
顶板(顶煤)活动规律
5) caving coal movement
顶煤运动
1.
According to the field survey at the single?body breaker prop sublevel caving support coal face in Jiulishan coal mine of Jiaozuo,the coal flow state and the drawing ellipsoid?body law during the caving coal movement,crushing and the drawing process at the single?body breaker prop coal face have been obtained.
通过焦作矿务局九里山矿单体支柱放顶煤工作面现场实测， 得出单体支柱放顶煤工作面顶煤运动、破碎、放煤过程中煤流动态及放出椭球体规律， 为确定合理放顶煤工艺参数提供了可靠的依据。
6) roof movement
顶板活动
1.
On the basis of characteristics of the roof movement ( from the initial mining phase, the special area to the through phase) and the key parameters of the first and periodic loading distance, Huojitu Colliery has initially grasped the loading regularity of the 2 -2 roof, which provides the scientific gist for roof management in working face.
介绍活鸡兔煤矿首采工作面从初始开采阶段、特殊地段及收尾贯通阶段顶板活动特点和老顶初次来压步距、周期来压步距等主要参数,初步掌握2 -2 煤顶板来压规律,为工作面顶板管理提供科学依据。
补充资料：活动顶蓬轿车
具有固定侧围框架的可开启式车身。车顶为硬顶或软顶，至少有两个位置：1.封闭；2.开启或拆除。可开启式车身可以通过使用一个或数个硬顶部件和/或合拢软顶将开启的车身关闭。4个或4个以上座位，至少两排。2个或4个侧门，4个或4个以上侧窗。
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