【作者】 苗霖田；

【导师】 夏玉成； 姚建明；

【作者基本信息】 西安科技大学 ， 矿产普查与勘探， 2008， 硕士

【摘要】 为了摸清榆神府矿区煤层赋存的基本特征及其影响因素,指导该能源化工基地的煤炭生产及未来矿区建设,本文应用趋势分析法研究了神北矿区5-2煤层和榆神矿区2-2煤层的赋存特征及其底板高程变化规律,分析了矿区内断层和褶皱的发育规律及其对煤矿生产的影响程度。最后研究了榆神矿区采煤对水资源的影响。提出了保水采煤的对策。本文研究结果显示:神北矿区5-2煤层厚度变化为东厚西薄、南北厚中部薄,在北端的前石畔井田中部煤层尖灭,石圪台井田该煤层缺失,在矿区南部的红柳林井田和北部大柳塔井田形成两个厚煤区;该区5-2煤层底板高程呈现出东高西低,南北高中部低的整体变化规律;发现神北矿区该煤层厚度变化与其底板高程有一定正相关关系。榆神矿区2-2煤层厚度的整体变化趋势整体呈现东南厚,西北薄。在矿区东南角的榆树湾井田形成一个富煤中心。榆神矿区2-2煤层底板的变化趋势为由东到西逐渐降低。这些煤层厚度变化特征都受到了古基底地貌和同沉积构造的控制。神北矿区发育有少量断层和宽缓褶皱,榆神矿区尚未发现大的断层,地层仅有宽缓的波状起伏,全区没有岩浆侵入;神北矿区的地质构造较榆神矿区稍复杂,但构造对采煤的影响程度不大。榆神矿区的大保当区东部榆树湾和西湾一带采煤引起的导水裂隙带可能会波及到粘土隔水层和萨拉乌苏组含水层,导致浅层地下水渗漏,形成采煤失水区;北部有一区域无萨拉乌苏组分布,成为无水区;榆树湾井田以西可以保水采煤,但生产过程中最好再采取保水措施,确保安全。更多还原

【Abstract】 Objective to find out the basic occurrence characteristics and its influencing factors, to guide the coal production and the future construction in the Yushenfu coal mining area, the occurrence characteristics and the change law of floor elevation about 5^-2 coal seam in northern mining area of shaanxi and 2^-2 coal seam in Yushen mining area are researched by means of trends analysis method which based on a large number of borehole （logging） data. The coal seam thickness contour map, coal seam thickness trends map, coal seam thickness residual map, floor counter map, floor elevation change trends map, floor elevation trends residual map are made by the surfer software. The distribution characteristics and influence factors of coal-rich and coal-thin areas are found by finding out global change trends and local abnormal of coal thickness. The developmental law and influence to mine production of faults and folds are researched. The distribution characteristics and thickness change of clay aquifuge be made up of Salawusu (Q_3s) aquifers and Lishi loess (Q_2L) and Hipparion clay (N_2b) which are important to surface eco-environment in Yushen mining area is studied finally. This region is divided into three parts-water preservation, water loss and no-water, by means of comparing the greatest development height of transmissive fissure zones according to the coal seam thickness with the strata thickness change between the impermeable layer and the main coal seam roof, which is to propose countermeasure to water protection mining.This article shows that: 5^-2 coal seam thickness change in northern mining area of shaanxi is east thick, west thin, north and south thick, middle thin, the central of Qian Shipan in most north pinch-out, Shi Getai mine field loss, Hong Liulin in southern mine area and Da Liuta in northern forming two coal-rich area; The global change law of 5^-2 coal seam floor elevation shows east high and west low, and south and north high and central low. This coal seam thickness change has a positive correlation with floor elevation. The global change trend of 2^-2 coal seam in the Yushen coal mining area is southeast thick and northwest thin, Yu Shuwan in southeast angle of the mining area forms a rich coal center. And this coal seam floor elevation shows gradually decreased from east to west. These thickness change characteristics of coal seam are controlled by the ancient basis terrain and the sedimentary structure. There are few faults and fold in northern mining area of shaanxi, but in Yushen mining area, there are no large fault to be found and no magma rush into whole area, and its strata only has width and sustained undulation. So the geologic structure of the front is few complexes than the later, but the structure has little influence to coal mining. The water loss region results from shallow groundwater’s lead when transmissive fissure zones of Yu Shuwan and XiWan of the eastern Da Baodang region in YuShen mining area is possibly able to affect to the clay aquiclude; The no-water region results from no distribution of Salawusu aquifers; Other regions is the water preservation, but the necessary measure must be take to guarantee the security in the production process.更多还原