潘谢矿区深部主采煤层顶、底板工程地质条件分析

Analysis of Engineering Geological Conditions of Deep Main Coal Seams′s Roofs and Floors in Panxie Area

潘谢矿区深部主采煤层深度均在800 m以下,属深部开采,工程地质条件较为复杂。利用主采煤层顶、底板的RQD值(岩石质量指标)和冲洗液消耗量,依据岩石质量划分规范及冲洗液消耗量对应的裂隙发育程度经验,对顶、底板的裂隙发育程度进行了定量对比分析,并利用2种方法研究了深部主采煤层顶、底板的工程地质条件。由综合评价及定量分析结果可知:各深部主采煤层顶、底板岩石平均RQD值介于25%~50%,岩石质量等级总体为不好。

The deep main coal seams in Panxie mining area have depth of at least 800 metes, which belongs to the deep mining, has more complicated engineering geological conditions. Whose RQD values（rock quality designation） and consumption of rinsing liquid have analysis with comparison quantitatively for their roofs and floors,depending on rock mass classification specification and experience of crack growth degree by consumption of rinsing liquid, with the two methods, engineering geological conditions of roofs and floors have been researched. Comprehensive evaluation and quantitative analysis show that： the rock roofs and floors have an average RQD between 25% ~50%,with a bad rock quality grade generally.