floor of coal seam的意思|示意

Soft roof and floor of coal seam could be easily damaged while support was not timely and strength was not enough, so overall support was needed for laneway with strong support strength.

煤层顶底板极松软，若支护不及时、强度不够时极易破坏，需对巷道进行整体支护并具有较大的支护强度。

This paper analyzed the influence of mining depth, coal seam dip, mining height and face length on depth of floor water-conductive fissure zone.

综合分析了开采深度、煤层倾角、煤层开采厚度、工作面斜长等地质采矿条件对底板采动导水破坏带深度的影响。

Rockmass structure is one of the controlling factors to coal seam floor's stabilization, and it has an important influence on the mining effect of coal seam floor.

底板岩体结构是煤层底板岩体稳定的主控因素之一，对煤层底板采动效应有着重要影响。

Based on the continuing interpolation grid of the roof and floor of coal seam, a new resolution to fault is put forward on 3d visualization deposit modeling.

基于煤层顶、底板的整体插值，实现了对三维可视化矿床模型的断层处理。

The hard-and-thick strata ACTS both as the floor of coal seam No. 7 and as the roof of coal seam No. 9 in Zhangshuanglou coal Mine; and coal seam No. 9 is also hard.

张双楼煤矿主采煤层为7煤和9煤，两层煤之间赋存唯一一层厚硬岩层，即9煤层的直接顶也是7煤层的直接底。

For a long time, the safe mining of our country's coal resources has been seriously affected by a primary factor which is water inrush from coal seam floor.

长期以来，煤层底板突水一直是严重影响我国煤矿资源安全开采的一个主要因素。