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一、早期的发展情况现在全世界对于合理开采煤层的要求越来越高,把一般厚度煤层中的采煤方法应用到较厚的煤层。开采较厚煤层时,由于单层开采法在技术上的限制,分层开采及冒落顶煤开采法代替了长壁式单层开采法。过去当采用机械化冒落顶煤开采法时,煤壁落下的煤由工作面运输机运走,顶板冒落的煤由采空侧的另一台运输机运走,因此,安装两
First, the early development Now the world for the rational exploitation of coal seam is increasingly high, the general thickness of coal mining method applied to the thick seam. When mining thick coal seam, due to the technical limitation of single-layer mining method, stratified mining and caving top coal mining method instead of longwall single-layer mining method. In the past, when mechanized caving top coal mining method was adopted, the coal falling from the coal wall was transported by the face conveyor and the coal falling from the roof was taken away by another conveyor on the gob side. Therefore, two