The calculation accuracy of diffusion speed in whole-space electromagnetic field affects directly the interpretative precision of TEM survey in underground coal mines.

全空间电磁场扩散速度计算的准确性，直接影响矿井瞬变电磁法探测结果的精度。

youdao

Basing on the field perambulation and information collection, 107 typical mines in Liaoning Province were evaluated with Analytic Hierarchy Process.

在现场勘察和资料收集的基础上，运用层次分析方法对辽宁省107个典型矿山地质环境现状进行的综合评估。

youdao

The Rumaila field, contracted to BP and China National Petroleum Corporation, includes an area ten miles long studded with mines.

ECONOMIST: Iraq's oil