朱仙庄煤矿“五含”水文地质特征及水害防治对策

Hydrogeological characteristics and prevention countermeasures of “fifth aquifer” in Zhuxianzhuang coal mine

淮北朱仙庄煤矿北部采区8煤开采主要水害威胁来自顶板侏罗系"五含","五含"压覆下首采面866-1工作面回采过程中发生"五含"溃水溃沙事故,造成重大损失。"五含"赋存条件复杂,勘探程度较低,亟待进一步探查、分析其水文地质条件及水害特征,以便提出根治其水害威胁的防治对策。通过对"五含"的空间展布、构造发育特征、岩溶发育规律、富水性及分区、水化学特征、水位动态特征及与主要含水层的补给关系等方面的勘探分析,对"五含"的水文地质特征进行了深入研究,得出"五含"具有静储量大、径流条件好、水压高、动态补给强等主要水害特征,提出了"帷幕截流"和"疏干开采"相结合的综合水害防治对策。

The main water hazard during mining of seam 8 in northern mining district comes from the“fifth aquifer”,of the roof Jurassic in Zhuxianzhuang coal mine.During extraction in the first mining face 866-1 under the fifth aquifer,water and sand burst accidents of the“fifth aquifer”have occurred,causing significant losses.The“fifth aquifer”has complex occurrence conditions and exploration degree is low,it was necessary tofurther explore and analyze its hydrogeological conditions and characteristics of water disasters,so as to put forward the countermeasures to eradicate the threat of water hazards.It was needed to research the hydrogeological and water damage characteristics further.From the space distribution,geologic structure development,law of karst development,hydrogeology and zoning,water chemical features,water level dynamic changes and the supply relationships with the main aquifers,the thorough research of“fifth aquifer”was carried out.It is concluded that the main water disaster features of“fifth aquifer”is big static reserve and good runoff condition,with high water pressure and strong dynamic supply,then,“curtain closure”and“dewaterring mining”were put forward as the combined countermeasures used to prevent water disasters.