"三软"厚煤层综放开采顶煤运移特征分析

针对“三软”厚煤层在综放开采情况下的顶煤运移变形特征,采用深基点位移观测法在预采顶分层和一次采全高两种情形下对顶煤的变形运移特性进行了现场观测及对比分析,从中得出两种情形下顶煤运移特征的异同点。本文结论对类似地质条件下的“三软”综放工作面确定合理的生产工艺参数提供了依据。

Analysis of the Movement Property of Top-coal for a Fully Mechanized Top Coal Caving Face in Three-soft Thick Seams

Ever since the fully mechanized top coal caving technology was introduced in 1982, it has now become the main way for thick-seam mines to raise their production and efficiency and improve their safe production-conditions. Generally, there are two ways such as the top coal caving method by which a thick seam is extracted at one time and when the first slice has been extracted. To know the movement property of the top coal for a fully mechanized top coal caving face in "three-soft" seams, this paper used deep-basic-dot method to observe it under two conditions and compared the results. Some new conclusions and coefficients were drawn from the in-situ data, which gave support for the fully mechanized top coal caving face under similar geological conditions to determine its mining efficiency.