黔北小区龙潭组下组煤开采充水特征分析

Analysis of Water Filling Characteristics of North Guizhou Area Longtan Formation Lower Seam Coal Mining

介绍了黔北小区煤层赋存特点及水文地质概况;进而对下组煤开采的充水因素及其特征进行了剖析;分析认为开采下组煤主要直接充水因素为顶板砂岩及岩溶裂隙水,主要突水因素为下组煤开采底板安全隔水厚度不足时的茅口组灰岩突水,此外采场周围煤岩体破坏沟通老空水亦是下组煤开采的主要突水因素,是龙潭组下组煤开采水害防治的重点;提出了下组煤开采的主要防治水措施,为黔北小区开采下组煤水害防治提供了实际资料和工作依据。

Coal seam occurrence characteristics and hydrogeological conditions are introduced; and then water filling factors and their characteristics of lower seam coal mining are analyzed; the analysis indicate that, for lower seam coal mining, the primary direct water filling factor is fissured water in roof sandstone and karst, and the primary water inrush factor is water inrush in Maokou formation limestones in case of inadequate thickness of seam floor safety aquiclude, in addition, the hydrops through damaged coal rock mass in gob area around the stope are also a main water filling factor, and is the focus of water disaster prevention of Longtan formation lower seam coal mining; main control water measures of lower seam coal mining are proposed, and practical information and work basis are provided for the water disaster prevention and control of Longtan formation lower seam coal mining.