1) block rock index
大块发生率
2) high-speed gust incident rate
大风日发生率
3) boulder yield
大块率
1.
Research on reducing boulder yield of medium-length hole blasting;
降低中深孔爆破大块率的研究
2.
Technology measures of lowing blasting boulder yield in Shuiyueyan surface limestone mine;
水月岩石灰石露天矿降低爆破大块率的技术措施
3.
To lower blasted boulder yield is one of the most important technical considerations in deep-hole blasting operations of mine.
降低深孔爆破落矿大块率是矿山凿岩中的一个重要课题。
4) boulder frequency
大块率
1.
Based on the research on colooision blasting of small compensation space,the cause of boulder t the first stage of the first stage of Dahongshan Copper Mine is found out,so as to take measures for improve the blast technique,cut down the boulder frequency and improve the quality of blasting.
通过中深孔小补偿空间挤压爆破的研究,找出大红山铜矿一期大块产出的原因,改进爆破工艺,降低大块率,提高爆破质量。
2.
The problem about boulder frequency because of the frozen coal seam has been overcome.
结果表明这一方案在该矿是可行的，能够克服因冻煤层而上部大块率较高这一难题；与以前爆破方案相比，炸药单耗降低２０％以上。
5) big block ratio
大块率
1.
After explosive properties and charging explosive structure are changed,for decreasing the big blasting block of medium-deep hole blasting the Houzhuang mine destrict of Jinling iron mine has taken some steps,for example to increase properly density factor value of blasting hole,etc The big block ratio is decreased from 25% to below 10
金岭铁矿侯庄矿区在炸药性能和装药结构发生变化后，为减少中深孔爆破大块，采取了适当加大炮孔密集系数ｍ值，采用孔底起爆加孔内双起爆药包相向同段起爆等措施，大块率由２５％左右降低到１０％以下。
6) big block coal
大块煤率
1.
The technical measure of improving the production of big block coal;
提高大块煤率的技术措施
补充资料：低出生体重儿发生率
低出生体重儿发生率
指某地区年内每100名活产数中，出生体重低于2500g的新生儿发生数之比值。其计算公式为：低出生体重儿发生率＝〓〓某年某地区出生体重〓〓低于2500g的新生儿数〓〓年内该地区活产数〓〓×100%出生低体重儿有因孕龄低，而体重与孕龄相符，其预后与早产儿相似。有孕龄达足月而体重低于2500g者为足月低体重，其预后常不同于早产儿。足月低体重儿死亡率常较早产儿低，即使存活者其智力发育也常较慢，不如早产儿存活者。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条