backfilling是什么意思？

backfilling

英['bækfɪlɪŋ] 美['bækfɪlɪŋ]

• v. 回填（挖掘的洞穴）( backfill的现在分词 )，充填；

例句

• Its dam foundation grout curtain and backfilling technologies are advanced. 在大坝基础工程帷幕灌浆、回填技术上处同行之首.
• High - water rapid - hardening backfilling with whole tailings is a new developed backfilling technology. 全尾砂高水速凝充填技术是一项新近发展起来的充填技术.
• Mining backfilling is restrained by relatively high filling cost. 充填采矿由于充填成本较高而制约着其发展.