洞室爆破 meaning in English
chamber blasting
coyote blast
heading blasting
Examples
- Application of chamber blasting to portal scaling
洞室爆破在洞脸削坡中的应用 - Control of blasting vibration of underground chamber at a hydropower station
地下洞室爆破振动控制研究 - ( 3 ) according to the actual geology situation in the material field , use the " alternation " principle of the value engineering analysis methods , and then find a better construction method to satisfy the requirement of rock - fill material , through using chamber blasting to substitute muffling and using an - fo to substitute ammonium nitrate explosive , and then huge economical benefits were gained , for example , the unit cost of its rock - fill material reduced from 11 . 77 m3 to 7 . 17 / m3 , and directly reduced the total cost by 4 . 26 million of cost
( : 3 )依据料场的实际地质情况，通过价值工程活动，利用价值分析的“代替”原理，在满足堆石料功能不变的条件下，采用洞室爆破代替深孔梯段爆破，采用按油炸药代替钱梯炸药，使得堆石料的开采成本显著降低，从投标价的h . 70元/ m3降低到7 . 17元/ m3 ，降低了4 . 53元/ mj ，以上坝堆石料94 . 2万m “计，直接降低成本426 . 75万元，产生了巨大的经济效益。