Serial blasting crater test method was used in underground medium and deep hole mining of Dahongshan copper mine for determining drilling and blasting parameters, and good results were obtained.

大红山铜矿地下中深孔采矿中，采用系列爆破漏斗试验方法确定中深孔采矿凿岩爆破参数，取得了较好的效果。

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To test the idea, Dr Henkel and his team have begun boring into the Malaren crater in order to map its cracks.

ECONOMIST: Geothermal energy