1) Thick Sand Stratum on Roof
顶板厚沙土层
2) thick sandy soil layer
厚沙土层
1.
Simulating test on damage regularities of thick sandy soil layer and load distribution on key roof block in shallow coal seams;
浅埋煤层厚沙土层顶板关键块动态载荷分布规律
2.
Studies on load-transmitting factor of thick sandy soil layer on key roof stratum in shallow seam mining;
厚沙土层在顶板关键层上的载荷传递因子研究
3.
Based on the measurement in site, the phenomenon of load reducing on roof key blocks structure under thick sandy soil layer was discovered.
基于现场实测发现的采动厚沙土层载荷传递现象,应用开发的动态载荷相似模拟系统,得出了厚沙土层采动破坏特征、工作面顶板关键层全结构的载荷总体分布规律以及顶板结构中A,B和C关键块的动态载荷传递规律;发现了周期来压期间二次"卸荷拱"现象,揭示了关键块载荷小于载荷层全厚载荷的机理;提出了载荷传递因子的概念,给出了卸荷拱高度的计算公式和载荷传递因子的计算公式,解决了关键块上的载荷计算问题。
4) thick carbonaceous mudstone roof
厚层炭质泥岩顶板
1.
The conventional bolt(or anchor) support method for a large span seam gateway with thick carbonaceous mudstone roof could not solve the key problems of the suspending on the roof with no stable strata above and would be easy to have a roof failing accident occurred.
厚层炭质泥岩顶板大跨度煤巷采用传统的锚杆(索)支护方式,无法解决无稳定上位岩层可供悬吊的关键难题,易发生垮冒事故。
5) thick seam roof
厚煤顶板
6) 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。
补充资料：沙土
1.含沙多的土壤。 2.沙和土。
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