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我国薄煤层储量占煤炭总储量的20%左右,如何有效地利用这些资源是许多矿井尤其是衰老矿井亟待解决的问题。对于高瓦斯矿井来说,开采薄煤层还可以作为主采煤层的解放层。1支架型式的确定薄煤层支架高度较低,且伸缩比较大,立柱都选用双伸缩立柱。由于高度低,操作不方便,一般不用机械加长段结构。为满足伸缩比大的要求,架型大多选择二柱掩护式液压支架。
The reserves of thin coal seam in our country account for about 20% of the total coal reserves. How to effectively use these resources is an urgent problem to be solved in many mines, especially in aging mines. For high-gas mines, the exploitation of thin coal seams can also be used as the main coal seam of the liberated layer. A stent type to determine the thickness of thin coal seam support is low, and the telescopic ratio, the columns are selected double telescopic columns. Due to the low height, the operation is not convenient, generally do not have mechanical extension of the structure. In order to meet the requirements of large scale ratio, the framework of the majority of choice of two-column shield hydraulic support.