2) thick seam roof
厚煤顶板
3) thick-hard roof
厚硬顶板
1.
8102 face in the Guobei Coal Mine, key technologies of reasonable mining under the condition of soft coal, thick-hard roof and contiguous seams have been studied by the integrated means of theory analysis,numerical simulation and field measurement.
本文以涡北煤矿8102工作面的地质条件和生产技术条件为基础,综合运用理论分析、数值模拟和现场实测等方法,对软煤、厚硬顶板、极近距离煤层合理开采关键技术进行了系统研究。
4) top slab
顶厚板
5) roof thickness
顶板厚度
1.
According to the thickness reduction theory,the safety roof thickness,stress,deformation,and plastic zones of gob area after excavation,analysis was made.
利用FLAC3D软件建立双层空区数值计算模型,根据厚度折减理论分析开挖后空区的安全顶板厚度和应力、变形、塑性区的分布情况,得到:安全顶板厚度与空区跨度之间符合线性关系;当跨度较小时,上部空区处于压应力状态,下部空区处于拉应力状态,最大拉应力随跨度的增大而增大;当系统达到临界状态时,上、下空区顶板的竖直位移最大,上空区的大位移区域面积明显大于下空区的大位移区域面积;空区对整体位移存在一定影响,如水平方向对整体位移的影响范围大致为跨度的1。
6) ultra-thickness plate
超厚板
1.
It is pointed out that combination intense strain processing of multidirectional forging and subsequent rolling,and an optimal quenching and pre-stretch and aging process are key techniques for the production of aluminum alloy ultra-thickness plates.
指出开发利用多向锻造后轧制的复合强应变,以及通过优化淬火、时效、预拉伸工艺是制备高性能铝合金超厚板的关键技术。
补充资料：标准煤(见煤当量)
标准煤(见煤当量)
standard coal
、~‘~1人、4《1工兀飞coal)见煤当等
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