1) Periodic weighting length
周期来压步距
2) pressure step
来压步距
1.
Based on the layout and boundary conditions of XV2306 working face of Wangtaipu coal mine,pressure step is determined through theoretical analysis and numerical simulation with FLACh3D.
根据王台铺煤矿XV2306工作面的布置方式和边界条件,运用理论分析估算和FLAC3D数值模拟的方法,研究确定工作面顶板的来压步距。
3) periodic weighting
周期来压
1.
When working face advance is more 30 meters each time,main roof has a periodic weighting.
当工作面推进到60 m左右,老顶出现初次破断,形成初次来压,之后工作面每推进30 m,老顶出现周期来压。
4) periodical pressure
周期来压
1.
it obtained the rule of strata behaviors of the working face, and analyzed the periodical pressure arose from periodical break occurred in nether roof, and explained mechanical principle of the road retained for next sublevel, the technical measures of strata control under this condition are put forward .
根据广西呼略矿不稳定煤层倾斜长壁开采的工业性试验,以及矿压观测成果,得出了工作面的矿压显现规律,分析了由直接顶周期性断裂而引起采场的周期来压现象,阐述了沿空成巷的力学原理,提出了在这种开采条件下岩层控制的技术措施。
2.
With the study on the moving law of the surrounding rocks in the seam mining processing of the fully mechanized coal mining face in 4-2 seam of Fengshuigou Mine,the paper understood the initial pressure and the periodical pressure distance of the 4-2 seam roof pressure,the support strength of the hydraulic supports in the coal mining face,the stress variation and stress a.
综采工作面矿压显现规律对矿山生产实践具有深刻的指导意义,文章通过对石场煤矿4-2煤层综采工作面围岩在煤层开采过程中的移动规律进行研究,掌握了4-2煤层顶板初次来压和周期来压步距、工作面支架支护强度、围岩破坏活动过程煤壁中应力变化大小和应力影响范围。
5) periodic fracture length
周期断裂步距
1.
The author deduces expressions for the first and periodic fracture length of main roofs with common boundary conditions of.
本文应用板的极限分析法求老顶的断裂步距,从而解决了按板模型周现有的方法不能计算老顶周期断裂步距的问题这种方法的另一个显著的优点是它不但适用于矩形采空区而且也适用于非矩形采空区。
补充资料：步距误差
分子式：
CAS号：
性质： 光学掩模版列或行上相邻功能图形中，某图像的点与相应图像对应点之间的距离叫步距。实测步距与规定步距之差即步距误差。
CAS号：
性质： 光学掩模版列或行上相邻功能图形中，某图像的点与相应图像对应点之间的距离叫步距。实测步距与规定步距之差即步距误差。
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