There have been some problems such as low coal recovery and difficult management after coal mining in steep seam mining method.
急倾斜煤层的回采一直存在着回采率低、采后难以管理等实际问题。
Base on the site observation and experimental research, the paper studied the top coal structure for the top coal caving mining in steep inclined seam sections.
在现场观测及实验研究基础上，对急倾斜水平分段放顶煤开采过程中顶煤体结构进行了研究。
The practice on sublevel combined mining in steep seam is approached and the advantage of it is analyzed. It is an efficient way to realize the high efficiency production in steep seam in coal mine.
介绍了急倾斜煤层小阶段联合开采的实践与探索，分析了小阶段联合开采的优越性，认为该方法是实现急倾斜矿井高产高效的有效途径。
The stable-compression-resilience-stable deformation features of the support structure was verified during the steep inclined seam mining process.
验证了急倾斜煤层开采过程中支护结构稳定-压缩-回弹-稳定的变形特性。
The feasibility of the protective coal pillar mining in the artificial inclined steep drift in the thick (ultra thick) coal seam of a large slope is discussed.
论证了急倾斜厚(特厚)煤层伪斜上山保护煤柱回收的可行性。
The steep inclined seam is a difficult mining seam with a poor safety condition, a poor support stability, a lower mechanization and lower mining rate.
急倾斜煤层属难采煤层，具有安全状况差、支架稳定性差、机械化程度低、回采效率低等问题。
The steep inclined seam is a difficult mining seam with a poor safety condition, a poor support stability, a lower mechanization and lower mining rate.
急倾斜煤层属难采煤层，具有安全状况差、支架稳定性差、机械化程度低、回采效率低等问题。
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