铁法煤田大明矿EW416综采工作面顶板离层水成因分析

EW416 Full Mechanized Face Roof Abscission Layer Water Genetic Analysis in Daming Coalmine,Tiefa Coalfield

大明矿EW416综采工作面在回顺施工瓦斯抽放孔时,6#瓦斯抽放孔发生滞后涌水,给工作面安全生产和正常接续造成很大影响。在分析工作面地质及水文地质条件的基础上,通过对涌水水量变化以及水质情况的现场观测,并结合对工作面涌水与第四系水井水样的分析对比,以及测线视电阻率曲线的分析和顶板导水裂隙带高度的计算,综合分析认为:工作面涌水源为工作面上部厚层火成岩下层间离层水,其类型为煤层顶板"空腔型"离层水。依据"空腔型"离层水的形成条件,进一步分析了火成岩侵入体附近煤层离层水的形成条件与涌水机理,为铁法煤田煤层顶板离层水防治提供了参考。

During the gas drainage borehole operation in the air -return crossheading, EW416 full mechanized thee, I）aming coahnine, a retarded water inrush has happened, thus seriously impacted face safe production and normal succession. On the basis .f working tace geological and hydrogeological condition analyses, have observed site water inflow variation and water quality situation, combined with face water inrush and Quaternary well water sample eontrastive analysis, as well as prospecting line apparent resistivity curve analysis and roof water conducted zone height computation. The comprehensive analysis has considered that the water inrush is from the ahscis- sion layer water under the upper part thick igneous rocks, belongs to coal roof ＂cavity type＂ abscission layer water. Aucording to ＂cav- ity type＂ abscission layer water genetic condition, has further analyzed coal seam nearby igneous roek intrusive body abscission layer water genetic condition and inrush mechanism. Thus the study has provided reference for coal roof abscission layer water control it, the Tiefa coalfieht.