摘要
分析了π型放顶煤工艺煤炭损失的因素 。
The factors of coal loss in “π” type caving coal mining process are analysed, and the methods of increasing the recovery rate are provided.
出处
《煤炭技术》
CAS
2002年第6期19-20,共2页
Coal Technology
关键词
π型放顶煤开采
回采率
脊背损失量
放煤步距
采放比
“π”type caving coal mining
recovery rate
coal loss
space of caving
ratio of mining
