中文摘要：

针对七台河矿区煤层倾角大、厚度变化大的特点,系统总结了高档普采、柔性掩护支架开采以及综采三个方法的特点、关键技术与适用条件,可为类似条件煤层安全高效开采提供参考。

英文摘要：

Owing to the characteristics of large angle seam and thickness variation in Qitaihe coal mine,this paper introduces the features,key technologies and application conditions of high grade conventionally-mechanized coal mining technology,flexible shield coal mining technology and fully mechanized coal mining technology in system.The conclusions can provide reference to the safe and efficient exploitation in similar conditions.