The mechanical model of key strata supported by coal pillar is set up according to the layout of coal pillars in the coalface of short wall mining.
根据短壁开采条件下保护煤柱的布设特点，建立由保护煤柱支承的关键层力学分析模型。
Mining high and support have influence on stress and displacement distribute of top coal, which offer the basic law of mechanical for top coal broken analysis and movement.
分析了采高和支架对顶煤应力和位移分布的影响，为顶煤破碎机理的分析和顶煤移动和运动规律的研究提供了依据。
Exploit in the mining machine underground used in the coal directly, it is one of the most important mechanical equipment in production on the coal.
采煤机直接用于煤炭的地下开采，是煤炭生产中最重要的机械设备之一。
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