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李建林,薛 杨,王心义,等. 基于流程分析和模糊综合评价的导水通道超前探查判识技术[J]. 煤炭科学技术,2024,52(7):1−9. doi: 10.12438/cst.2023-1269
引用本文: 李建林,薛 杨,王心义,等. 基于流程分析和模糊综合评价的导水通道超前探查判识技术[J]. 煤炭科学技术,2024,52(7):1−9. doi: 10.12438/cst.2023-1269
LI Jianlin,XUE Yang,WANG Xinyi,et al. Judgment technique for over-exploration of water-conducting channels based on process analysis and fuzzy comprehensive evaluation[J]. Coal Science and Technology,2024,52(7):1−9. doi: 10.12438/cst.2023-1269
Citation: LI Jianlin,XUE Yang,WANG Xinyi,et al. Judgment technique for over-exploration of water-conducting channels based on process analysis and fuzzy comprehensive evaluation[J]. Coal Science and Technology,2024,52(7):1−9. doi: 10.12438/cst.2023-1269

基于流程分析和模糊综合评价的导水通道超前探查判识技术

Judgment technique for over-exploration of water-conducting channels based on process analysis and fuzzy comprehensive evaluation

  • 摘要: 华北型煤田地质条件复杂,煤层底板受构造切割形成大量导水通道,其探查判识一直是水害防治中的重点和难点。以多分支定向长钻孔超前探查为基础,构建了基于流程分析与模糊综合评价相结合的导水通道判识技术。首先在超前探查过程中,选取钻时录井、钻井液消耗量、γ录井、岩屑录井、压水试验、可注性6个评判指标,将施工过程分为16种工况,依此建立综合分析流程图,对样点是否导水进行定性判识;其次采用钻速、钻井液消耗量、γ值、非灰岩占比、单位压注量和注浆量对6个指标进行量化分级,利用超标加权法确定指标权重,基于模糊理论和最大隶属度原则对样点是否导水进行3级定量判识;最后利用该技术对赵固一矿15031工作面13个点位进行综合流程分析和模糊综合评价,其中10个点位导水可能性高,3个点位导水可能性低;在此基础上,结合工程实际成功标定了3条导水通道的具体位置。该技术构建了导水通道的判识指标体系,并对其进行量化分级与综合评估,提高了煤层底板导水通道的判识度。

     

    Abstract: The geological conditions of the North China coal field are complicated, and the bottom plate of the coal seam is cut by the tectonic structure to form a large number of water-conducting passages, whose detection and identification have always been the key point and difficulty in water damage prevention and control. Based on the multi-branch directional long drilling overrun investigation, a water channel identification technology combining process analysis and fuzzy comprehensive evaluation has been constructed. Firstly, during the advanced exploration process, select drilling time recording, drilling fluid consumption, γ recording, rock chip recording, water pressure test, and injectability are used as six evaluation indicators. Divide the construction process into 16 working conditions, and establish a comprehensive analysis flowchart based on this to qualitatively identify whether the sample points is water-conducting. Secondly using drilling speed, drilling fluid consumption γ Value, non limestone proportion, unit injection volume, and injection volume are used to quantify and classify the six indicators, and the weights of the indicators are determined by using the exceeding weighting method, so that a three-level quantitative identification is made based on the fuzzy theory and Maximum membership principle on whether the sample point is water-conducting or not. Lastly using this technique, comprehensive process analysis and fuzzy comprehensive evaluation were carried out on 13 points in the 15031 working face of Zhaogu No.1 mine, and finally the specific locations of 3 water-conducting channels were successfully marked. This technique constructs a system of indicators for identifying water-conducting channels, and carries out quantitative grading and comprehensive evaluation, which improves the identification of water-conducting channels in the coal bed floor.

     

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