论文部分内容阅读
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 depth of the main deep coal seams in Panxie Mining Area is below 800 m, which belongs to deep mining and the engineering geological conditions are complicated. Based on RQD value (rock quality index) and flushing fluid consumption of roof and floor of the main coal seam, according to the specification of rock quality and experience of fissure development corresponding to the consumption of flushing fluid, the degree of fissure development of roof and floor was quantified By contrast, two kinds of methods are used to study the engineering geological conditions of the top and bottom of deep main coal seam. According to the results of comprehensive evaluation and quantitative analysis, the average RQD value of top and bottom rock of each deep main coal seam ranges from 25% to 50%, and the overall rock quality grade is not good.