The first happened in Uzbekistan, on September 30, 1966 with a blast 1.5 times the strength of the Hiroshima bomb and at a depth of 1.5 kilometers.
第一起是1966年9月30日，在乌兹别克斯坦境内，苏联以1.5倍于日本广岛核爆炸当量的爆炸，在地下1.5千米深的位置堵住了石油泄漏点。
The relationship between temperature, carbon loss rate and compression strength of coke in the lumpish section of blast furnace was investigated.
重点研究焦炭在高炉块状带内的抗压强度与温度和反应程度的关系。
During the anchoring and shotcreting construction at the rock heading blast advancement face, problems such as support strength can not be guaranteed or engineering quality uneasy to control exist.
岩巷炮掘工作面的锚喷施工存在支护强度得不到保证、工程质量不易控制等问题。
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