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煤矿导水裂隙带影响因素敏感性及高度预测研究

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研究导水裂隙带高度是含水层修复和地表生态保护的重要基础,明确其影响因素的敏感性排序,有利于抓住主要矛盾,安全高效地实现矿井水预防.本文采用现场实测、数值模拟和数学统计方法,分析了导水裂隙带高度与岩层硬度、工作面长度、采高和埋深的内在联系,得到了导水裂隙带高度计算公式,并在现场得到应用.通过研究可知:导水裂隙带高度在硬岩中传导更快,而软岩可以抑制导水裂隙带高度.软岩与硬岩组合(下软上硬)导水裂隙带高度大于硬岩与软岩组合(下硬上软)导水裂隙带高度.开采方法会影响导水裂隙带高度,综放开采导水裂隙带高度大于厚煤层分层开采、单一薄煤层开采、单一中厚煤层开采.各因素影响导水裂隙带高度的程度为:采高＞硬岩岩性比例系数＞采深＞工作面长度.与"三下"规程经验公式相比,利用多因素拟合公式可以较好地实现乌兰木伦煤矿 12403工作面导水裂隙带高度预测,误差仅为-2.54%,研究成果为地下水资源保护和水害治理提供指导依据.
Study on influencing factors sensitivity and height prediction of water conducting fractured zone in coal mine
Studying the height of water conducting fractured zone is an important foundation for aquifer restoration and surface ecological protection.Clarifying the sensitivity ranking of its influencing factors is conducive to grasping the main contradictions and achieving safe and efficient prevention of mine water.In this paper,field measurement,numerical modeling and mathematical calculation methods are used to analyze the intrinsic connection between the height of water conducting fractured zone and the lithology combination,mining thickness,working face length,and burial depth.The equation for computing the height of water conducting fractured zone is obtained and applied in the field.The specific conclusion is as follows the height of water conducting fractured zone conducts faster in hard rock,while soft rock can inhibition the height of water conducting fractured zone.The height of water conducting fractured zone in the combination of soft rock and hard rock(lower soft and upper hard)is greater than that in the combination of hard rock and soft rock(lower hard and upper soft).The mining method will affect the height of water conducting fractured zone,and the height of water conducting fractured zone in fully mechanized mining is greater than that in thick coal seam layered mining,single thin coal seam mining,and single medium thick coal seam mining.Ranking of sensitivity of various factors to the height of water conducting fractured zone:mining thickness＞hard rock lithology ratio coefficient＞mining depth＞working face length.Compared with the empirical formula of the three regulations,using multi-factor fitting equation can better predict the height of water conducting fractured zone in the 12403 working face of Wulanmulun Coal Mine,with an error of only-2.54%.The research results provide guidance for groundwater resource protection and water hazard treatment.

lithology combinationmulti-factor analysisheight of water conducting fractured zonesensitivityprediction formula

李晓斌、李全生、李金松、刘小庆、李井峰、方杰、张勇、王路军、张传玖

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北京低碳清洁能源研究院 煤炭开采水资源保护与利用全国重点实验室,北京 102209

国家能源投资集团有限责任公司,北京 100011

煤炭科学研究总院有限公司,北京 100013

国家能源神东煤炭集团有限责任公司技术研究院,陕西 榆林 719315

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岩性组合 多因素分析 导水裂隙带高度 敏感性 预测公式

国家自然科学基金项目资助国家重点研发计划项目资助神东矿区煤矿地下水库智能监测与安全防控研究及示范项目资助国家能源集团科技项目资助

524041092023YFF1306000GJNY-21-26GJNY-21-129

2024

10.12075/j.issn.1004-4051.20240860

中国矿业
中国矿业联合会

中国矿业

CSTPCD北大核心
影响因子：0.875
ISSN：1004-4051
年,卷(期)：2024.33(10)