搜索结果: 1-1 共查到“安全科学技术 Iron mine”相关记录1条 . 查询时间(0.078 秒)
Stability of workface using long-wall mining method in extremely thin and gently inclined iron mine
Long-wall method Extremely thin Iron mine Surrounding rock Stability
2012/3/27
Long-wall mining method has its own advantages, such as small mining-cutting ratio, the simple technique of recovery and high level of mechanization, which is the optimal method used to mine gently in...