1) far distance lower protective seam exploitation
远距离下保护层开采
1.
Using numerical simulation method,we studied the stress distribution of overlying coal rock body and the pressure-relief and deformation rules of protected coal seam under the situation of far distance lower protective seam exploitation,obtaining the stress distribution characteristics,scope of pressure relief,and deformation rules etc.
运用计算机数值模拟方法,对远距离下保护层开采上覆煤岩体应力分布、被保护层卸压变形规律进行研究,得出下保护层开采被保护层应力分布特征、卸压范围、变形规律等。
3) low protected seam with ultra distance
超距离下保护层
4) Mining Protecting Strata
下保护层开采
1.
Research on Overlying Rock-Coal Failure and Deformation Caused by Mining Protecting Strata, and Relieved Methane Drainage;
下保护层开采上覆煤岩变形与卸压瓦斯抽采研究
5) distance protection
远距离保护
6) protective seam mining
保护层开采
1.
In solving the problem of deformation in surrounding rocks of the overlying coal entry caused by upper protective seam mining,reinforcing the surrounding rocks by grouting is a feasible method.
为了解决下保护层开采对上覆煤层巷道围岩变形的影响,采用注浆加固巷道围岩是一种可行的方法。
2.
The result indicates that during the process of lower protective seam mining,the bed separation .
研究表明,在下保护层开采过程中,开采离层裂隙可发育到约100 m高,采裂高厚比达44;被保护煤层沿走向卸压保护范围达到30 m以上、卸压保护角为54°;在采空区四周形成一个离层裂隙发育的"O"形圈,其周边宽度约34 m;被保护煤层的卸压瓦斯可通过它被抽采出来。
补充资料：远距离工作
远距离工作：指通过电子计算机和远距离通信设备%26#8220;去%26#8221;工作的方法。
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