皖北刘桥二矿井下析出物的成因探讨

皖北刘桥二矿投产两年多来，井下的渗水部位不断有钙质及铁、锰质等析出物形成。初步分析认为，这是地下水的水文地球化学环境变化及其对围岩产生机械、化学潜蚀作用的结果。析出物形成速度快、局部排出量大，对矿井水环境质量和井巷围岩稳定性有一定影响。由于该现象在黄淮地区的许多矿井中均有发现，故应引起生产单位和学术界的充分重视。

Genesis of the Exudates of Underground Mine IN Liuqiao No.2 coal Mine,North Anhui

The exudates of ca ,Feand Mn et al have been continuing to emerge from the seepage sites of unedrground mine,since Liuqiao No.2 coal mine was built.After investigation and analysis,it is found that this is the result of changes of hydrogeo chemical environment and mechanical and chemical suffosion which takes effect on the bedrock .Exudates are formed faster and its quanlity of emerging is more in some sites .there fore ,formation of exudates have influence on the mining drainage quality and the mechanical strengthe and stability of bedrock,it is very necessary to research in detail.