含夹矸厚煤层综放开采顶煤运移规律数值模拟

根据鹤岗富力矿含中位厚夹矸煤层地质条件及煤的赋存状况,应用RFPA2D数值模拟软件分别对-450南18-2工作面含0.5、1.0、1.5 m厚夹矸开采煤体的运移情况进行数值模拟。结果表明,采动过程中,上部顶煤垂直方向的位移量均大于下部,而下部顶煤始动点距工作面的距离均大于上部。夹矸层强度与煤层强度既定情况下,工作面顶煤的运移规律及破碎程度均与含夹矸层的厚度相关。含1.0 m厚夹矸顶煤总位移量大于含0.5、1.5 m厚夹矸顶煤总位移量;含1.0 m厚夹矸顶煤比含0.5、1.5 m厚夹矸顶煤破碎充分。该研究为含夹矸条件下厚煤层综放开采冒放工艺的确定提供了依据。

Numerical simulation of top coal moving regularity about fully mechanical top coal caving of thick coal seam with gangue

This paper builds on thick coal seam of geological conditions and occurrence status of Fuli coal mine in Hegang and describes the use of RFPA2D numerical simulation software to simulate the moving regularity of-450 south 18-2 working face,with different gangue thickness 0.5,1.0,1.5 m respectively.The results show that the upper top coal has larger vertical displacement than the lower in mining process,and the starting point of the lower top coal is more distant than that of the upper top coal from working face.With certain strength of gangue and coal seam,top coal in the working face shows the moving regularity and the degree of crushing,depending on gangue thickness,the top coal with 1.0 m gangue thickness gives a greater displacement and better crushing than that with 0.5 m or 1.5 m.The research could provide a better basis for the caving process of thick coal seam with gangue in fully mechanized top coal caving.