摘要
为防止矿井底板突水事故的发生,提升预警的准确性,对袁店一井煤矿105采区10煤层底板太原组各灰岩含水层的水文地质特征及水力联系进行了研究。在105采区测试巷分两次对太原组灰岩水进行定向钻孔群放水试验,结合水文观测孔动态监测与水质分析,系统评价了灰岩各含水层间水力联系,结果表明:太原组灰岩富水性呈现浅强深弱的垂向分异特征,1-4灰浅部水力联系较强,深部渗透性显著降低;太灰与奥陶系灰岩之间无显著水力联系,断层导水性分析显示断层未沟通深层奥灰含水层;水质特征差异进一步验证了太灰与奥灰的独立性。结合10煤底板灰岩高水压、贫富水、不均一的特点,在工作面底板1-4灰布置水平定向钻孔,对灰岩水实施疏水降压,以预防底板突水发生,确保安全回采,研究成果为105采区底板灰岩水害防治及工作面安全回采提供了科学依据,为研究多含水层水力联系提供了新的思路。
To prevent floor water inrush accidents in coal mines and enhance the accuracy of early warning systems,this study investigates the hydrogeological characteristics and hydraulic connections among limestone aquifers in the Taiyuan Formation beneath the No.10 coal seam of Panel 105 inYuandian No.1 Coal Mine.Two directional borehole group drainage tests were conducted in the test roadway of Panel 105 to analyze the Taiyuan Formation limestone water.Combined with dynamic monitoring of hydrological observation holes and water quality analysis,the hydraulic linkages between limestone aquifers were systematically evaluated.The results indicate that the water abundance of the Taiyuan Formation limestone exhibits a vertical differentiation pattern characterized by higher water-richness in shallow layers and weaker water-bearing capacity in deeper layers.Strong hydraulic connections exist in shallow L1-L4 limestone layers,while permeability decreases significantly in deeper zones.No notable hydraulic connection was identified between the Taiyuan Formation and Ordovician limestone aquifers.Distinct water quality characteristics further validate the hydraulic independence of the Taiyuan Formation and Ordovician limestone.Given the high water pressure,low water abundance,and heterogeneity of the limestone aquifers beneath the No.10 coal seam,horizontal directional boreholes were deployed in the L1-L4 limestone layers of the working face floor to implement drainage and pressure relief,effectively mitigating the risk of floor water inrush and ensuring safe coal extraction.This research provides a scientific foundation for preventing water hazards from floor limestone aquifers in Panel 105 and offers novel insights into the study of hydraulic interactions among multi-aquifer systems.
作者
陈辉亭
CHEN Huiting(Yuandian No.1 Coal Mine,Huaibei Mining Co.,Ltd.,Huaibei 235000,China)
出处
《华北科技学院学报》
2025年第3期31-37,共7页
Journal of North China Institute of Science and Technology
基金
淮北矿业股份有限公司科技支撑项目(淮矿技合字2024第158号)。
关键词
袁店一井煤矿
105采区
底板灰岩
放水试验
水力联系
Yuandian No.1 Coal Mine
Panel 105
floor limestone
water discharge test
hydraulic connectivity
