张云峰, 孙增兵, 王斌斌, 邢立亭. 单孔分层抽水法的改进及在准东煤田的应用[J]. 煤田地质与勘探, 2016, 44(3): 92-96. DOI: 10.3969/j.issn.1001-1986.2016.03.017
引用本文: 张云峰, 孙增兵, 王斌斌, 邢立亭. 单孔分层抽水法的改进及在准东煤田的应用[J]. 煤田地质与勘探, 2016, 44(3): 92-96. DOI: 10.3969/j.issn.1001-1986.2016.03.017
ZHANG Yunfeng, SUN Zengbing, WANG Binbin, XING Liting. Amelioration of hierarchical method of single borehole pumping test and its application in Zhundong coalfield[J]. COAL GEOLOGY & EXPLORATION, 2016, 44(3): 92-96. DOI: 10.3969/j.issn.1001-1986.2016.03.017
Citation: ZHANG Yunfeng, SUN Zengbing, WANG Binbin, XING Liting. Amelioration of hierarchical method of single borehole pumping test and its application in Zhundong coalfield[J]. COAL GEOLOGY & EXPLORATION, 2016, 44(3): 92-96. DOI: 10.3969/j.issn.1001-1986.2016.03.017

单孔分层抽水法的改进及在准东煤田的应用

Amelioration of hierarchical method of single borehole pumping test and its application in Zhundong coalfield

  • 摘要: 准东煤田地层具有固结较弱、水敏性及抗扰动性差的特点,传统自上而下的分层抽水试验方法在该地区容易引发孔内坍塌、上下层之间的止水失败、套管、井管和滤水管难以拔出等问题,造成抽水试验结果偏差较大或失败。在实践分析的基础上提出了自下而上分层抽水试验的方法,有效地解决了传统自上而下分层抽水方法存在的问题,采用稳定流抽水试验求取的水文地质参数与矿区的实际条件相吻合,而且易于实施,经过在准东煤田钻孔抽水试验中的应用,取得了较好的效果,对同类型煤田勘探钻孔抽水试验具有一定的指导意义。

     

    Abstract: Strata in Zhundong coalfield are weakly consolidated, sensitive to water and poor in anti-disturbance, so traditional hierarchical top-down pumping test in the area easily leads the hole collapse, sealing failure in the adjacent aquifers, difficulties in pulling out well pipes and filter pipes. All these problems have resulted in large deviation or failure of the pumping test results. Based on the practical analysis, the bottom-top hierarchical method of pumping test was put forward. It effectively solved the problems of the traditional method and is easy to implement. Hydrogeological parameters of steady flow pumping test obtained by this method accorded to the actual conditions in the mining area. After pumping test in Zhundong coalfield, the bottom-top hierarchical method of pumping test has obtained good effect and certain guiding significance for the hole pumping test of the same type of coalfield.

     

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