王家岭煤矿中奥陶统峰峰组隔水特征分析

依据王家岭煤矿中奥陶统峰峰组岩性特征及采样分析结果,把该组划分为四个层段:风化淋滤段、上部含石膏段、厚层泥晶灰岩段和下部含膏岩段。在分析该区水文孔抽水试验和岩样溶蚀实验结果的基础上,结合区域的水文地质特征、构造特点、岩性等方面情况,分段分析了峰峰组的隔水特性,分析认为:风化淋滤段、上部含石膏段和厚层泥晶灰岩段隔水能力较弱,下部含膏岩段隔水能力很强。分析结果对开采太原组煤层有一定的参考价值。

Impermeability Analysis of Middle Ordovician Fengfeng Formation in Wangjialing Coalmine

Ba sed on lithologic characteristics and sample analysis results of the Middle Ordovician Fengfeng Formation in the Wangjialing coalmine, divided the formation into four sectors： weathered eluvial sector, upper gypsum-bearing sector, thick-bedded micritic limestone sector and lower gypsum-bearing sector. Based on pumping test and rock sample corrosion test results, combined with regional hydrogeological, structural and lithologic features, and then analyzed impermeability of Fengfeng Formation sector by sector. The analysis considered that： the weathered eluvial, upper gypsum-bearing and thick-bedded micritic limestone sectors have rather weak impermeability, while the lower gypsum-bearing sector quite strong. The analyzed result has certain reference value during the mining of Taiyuan Formation coal seams.