摘要
文章介绍了炮采单体柱放顶煤开采法在长沟矿生产中的应用,以及取得的成功经验。
the article explains the causes of car - skipping on bridges and proposes some ways to guarantee the quality of backfilling and reduce car- skipping on bridges
出处
《山西科技》
2008年第1期144-145,共2页
Shanxi Science and Technology
