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论文中文题名:

 红柳林煤矿2-2煤顶板涌(突)水危险性评价    

姓名:

 李东东    

学号:

 201411596    

学生类型:

 工程硕士    

学位年度:

 2017    

院系:

 地质与环境学院    

专业:

 地质工程    

第一导师姓名:

 王英    

第二导师姓名:

 范立民    

论文外文题名:

 Evaluation of Water Bursting Risk from the roof of 2-2 coal seam in Hong Liulin Coalmine    

论文中文关键词:

 红柳林煤矿 ; 导水裂缝带 ; 富水性评价 ; 数值模拟 ; 含水层    

论文外文关键词:

 Hong LiuLin coalmine ; Flowing fractured zone ; Water-richness evaluation ; Numerical simulation ; Aquifer    

论文中文摘要:
红柳林煤矿含煤地层为侏罗系中统延安组,本文所研究的2-2煤,位于延安组第四段顶部,是井田内最顶层的可采煤层。该煤层上覆有多层含水层,未来将影响其开采的,主要是上覆的侏罗系中统延安组、直罗组风化基岩含水层和第四系松散沙层含水层。 本文利用FLAC3D数值模拟软件,对2-2煤开采后形成的导水裂缝带发育规律进行了模拟研究。将数值模拟所得裂采比,与同矿区大柳塔煤矿2-2煤开采形成的导水裂缝带实测数据做类比分析,综合分析后选用模拟所得裂采比,对红柳林煤矿2-2煤开采形成的导水裂缝带高度进行了预测。分别将2-2煤到风化基岩含水层及松散沙层含水层的距离,减去所预测的导水裂缝带高度,根据结果是否小于0,生成了冒裂安全性分区图,将2-2煤上覆的该两层含水层划分成了突破区和未突破区。分别利用不同的方法对风化基岩含水层和松散沙层含水层,进行了富水性评价和分区。其中,风化基岩含水层是2-2煤的直接充水含水层,含水丰富,为了最大程度切合实际的描述该层含水层的富水性,本文选择了5个影响风化基岩含水层富水性的主控因素,生成了专题图,并利用G1-变异系数赋权法得到的权重,将这5个主控因素进行了融合,构建了评价风化基岩含水层富水性的综合指标-富水性指数,并利用此指标对2-2煤上覆风化基岩含水层进行了富水性评价和分区。松散沙层含水层是2-2煤的间接充水含水层,由于其在2-2煤分布的大部分区域不含水,本文利用该区域内泉流量和抽水试验数据相结合的方式,对其进行了富水性评价和分区。 通过将风化基岩含水层及松散沙层含水层富水性分区图,与其对应的冒裂安全性分区图进行叠加,生成涌(突)水危险性分区图。结果表明,对于风化基岩含水层,仅西一盘区西部井田边界附近区域为相对安全区,东部盘区边界线和剥蚀边界沿线为较危险区域,且其中小范围区域为危险区,中部大范围区域为过渡区;对于松散沙层含水层,由于该含水层在井田范围内大多数区域不含水,对2-2煤的开采影响较小。
论文外文摘要:
The coal-bearing strata of Hongliulin coalmine are Middle Jurassic Yan'an Formation. The 2-2 coal seam studied in this paper is located at the top of the fourth section of Yan'an Formation, which is the top coal seam in the field. There are multi-layer aquifers on the coal seam. The exploitation of 2-2 coal seam will mainly be affected by weathered bedrock aquife of Middle Jurassic Yan'an Formation and Zhiluo Formation and Quaternary loose sand aquife in future. In this paper, the FLAC3D numerical simulation software is used to simulate the development of water flowing fractured zone after 2-2 coal mining. Comparing the simulated crack production ratio with the mining of Daliuta coalmine 2-2 coal mining formation water flowing fractured zone, we can use simulated crack production ratio to predict the height of water flowing fractured zone to the coal mine coal mining 2-2 after comprehensive analysis. The 2-2 coal to weathered bedrock aquifer and loose sand aquifer in the distance subtracts the height of water flowing fractured zone minus the predicted, according to whether the result is less than 0, breakthrough range distributio is generated. Coal 2-2 overlying the two layer aquifer is divided into a breakthrough zone and no breakthrough region. Respectively, using different methods of weathered bedrock aquifer and loose sand aquifer evaluates the water enrichment and zoning. Among them, the weathering of bedrock aquifer is 2-2 coal direct water filling aquifer and rich water. In order to maximize the realistic description of the rich water aquifer, this paper chooses 5 main influence factors of weathered bedrock water rich. Generates thematic maps and get the weight by variationG1-Coefficient of Variation method. The 5 main factors of integration construct the comprehensive evaluation index of weathered bedrock water rich water abundance index, and the index of 2-2 coal overlying weathering bedrock aquifer of rich water assessment and zoning. Loose sand aquifer is the indirect water filling aquifer 2-2 coal, and 2-2 coal in most regions due to the distribution of water, the area of spring flow and pumping test data combination has carried on the water enrichment evaluation and zoning. The weathering of bedrock aquifer and loose sand aquifer water partition map correspond to the breakthrough of the stack area distribution, generating surge risk zoning map of water. The results show that the weathered bedrock aquifer, only the West an area near the border of west region is relatively safe area, and the eastern boundary line vitalisk areas and erosion along the border is a dangerous area, and the small area in the danger zone, a wide range of central region is the transition zone; for loose sand aquifer, the water water in the scope of most areas without water had little effect on 2-2 coal mining.
中图分类号:

 TD745    

开放日期:

 2017-06-16    

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