It is the most common way to remain coal safety pillar for protecting surface buildings from mining damage.

留设保护煤柱是防止建筑物受采动损坏的最常用方法。

youdao

It is first raised that safety coefficient can be calculated by using the widths of yield zone and pillar, and the steps of designing the strip mining size are pro-posed.

首次提出了根据屈服带宽度和条带煤柱宽度来确定条带开采安全系数的方法，同时给出了设计条带开采尺寸的步聚。

youdao

This paper calculates reliability index, lose efficacy probability and safety coefficient corresponding to the width of different barrier pillar.

并计算了与防水煤柱有关的可靠度指标、失效概率和安全系数。

youdao

If Washington policymakers could hold the twin goals of solvency and modernization in their heads at the same time, they could take a few relatively modest steps needed to reform Social Security and enhance a key pillar of the social safety net for the most vulnerable elderly.

FORBES: Commonsense Ways To Fix Social Security

Last Autumn, a George V pillar box was removed from the road for health and safety reasons.

BBC: Kensington post boxes sealed after postman loses keys