A controlled blasting technology was applied to the construction of freezing thick gravel stratum section in the main shaft of Xulou Mine.

许楼煤矿在主井人工冻结巨厚砾岩段施工中，采用了控制爆破技术。

youdao

Tin ore, copper, zinc mine, iron ore, snake bite mine, silica, sand and gravel sales.

锡矿、铜矿、锌矿、铁矿、蛇纹矿、硅石、砂石购销。

youdao

The taxpayers claimed their farmland was a really great spot to have a gravel mine, but the Tax Court agreed with the IRS that the farmland was a really good spot to have a farm.

FORBES: Fantasy Gravel Mining and Other Fun From the Tax Court

Tom West, who represents Norse in the challenge to Dryden's zoning law, said he'll argue that the Frew Run case, which involved a gravel mine, doesn't apply because the state mining law is fundamentally different from the oil and gas statutes.

WSJ: NY appeals court to consider local fracking bans