摘要
在陕北侏罗系煤田中,除着重分析萨拉乌苏组含水层富水性之外,大面积的基岩风化带也是防治水工作的重中之重。为做好疏放水工作,预防突水事故的发生,在梳理分析井田水文地质资料、区域构造、前人研究结论及区内风化带厚度、岩性、风化程度等的基础上,结合瞬变电磁勘探解释成果,以小保当井田部分勘查区为例,对其基岩风化带含水层的富水性进行了综合分析。初步圈定了区内基岩风化带富水异常区,并借鉴区内其他含水层富水性统一得出趋势结论。总结了风化岩特征及富水性影响因素后,结合其他含水层富水情况,发现本区基岩风化带的富水性为弱-中等,在测区西南部、东北部富水性较强,对开采工作有一定的影响,该研究成果可以为煤层开采过程中的疏放水工作提供一定的指导。
In the Jurassic coalfields of Northern Shaanxi,in addition to the Salawusu formation aquifer,a large area of bedrock weathering zone is also the focus of water control work.In order to prevent the occurrence of water inrush accidents,taking the exploration area of Xiaobaodangjing minefield as an example,based on the analysis of the hydrogeological data,regional structure,predecessor research conclusions,and the thickness,lithology and weathering degree of weathered zone,and combined with the results of TEM exploration and interpretation,the water abundance of aquifer in bedrock weathered zone was comprehensively analyzed,and the water-rich abnormal area in the bedrock weathering zone was preliminarily defined.Based on the analysis of the characteristics of the weathered bedrock and the influencing factors of the water abundance,combined with the water abundance of other aquifers,it is determined that the water abundance of the bedrock weathered zone in this area is weak to medium,and the water abundance of the southwest and northeast of the exploration area is strong,which has a certain impact on the mining work.The research results can provide some guidance for the water control work in the process of coal mining.
作者
古瑶
王施智
耿清
吕琳琳
GU Yao;WANG Shi-zhi;GENG Qing;LYU Lin-lin(Shaanxi Coalfield Geophysical Surveying and Mapping Co.,Ltd.,Xi’an 71005,China)
出处
《陕西煤炭》
2020年第1期89-91,107,共4页
Shaanxi Coal
关键词
陕北侏罗系煤田
风化基岩
富水异常区
瞬变电磁法
防治水
Jurassic coalfield
weathered bedrock
water rich abnormal area
transient electromagnetic method
water prevention and control
