原始地层下与采空区下大采高工作面矿压显现规律对比研究

发布时间：2018-07-03 16:24

本文选题：原始地层下 + 采空区下　；参考：《西安科技大学》2015年硕士论文

【摘要】：龙王沟煤矿位于内蒙古鄂尔多斯准格尔煤田中部,龙王沟煤矿主采6#煤层是近水平的特厚煤层,为了研究近水平特厚煤层在原始地层下与采空区下使用大采高大放高开采时矿压显现规律的异同,此次研究采用了理论分析、物理相似模拟、数值模拟方法对在原始地层下与采空区下进行特厚煤层大采高大放高开采时矿压显现规律进行对比研究。理论分析方面,根据煤层上覆各岩层的厚度及岩性,经计算分析确定了直接顶、老顶及关键层的厚度和位置。计算了老顶、关键层的初次来压步距、周期来压步距等,这些分析计算从理论上说明了6#煤层开采时的覆岩运移规律及矿压显现规律。物理相似模拟方面,通过实验室里的物理相似模拟,测得了在原始地层下以及采空区下开采时老顶的初次来压步距、周期来压步距,煤层底板支承压力分布,煤层上覆岩层的运移状况。物理相似模拟结合理论分析进一步明确了在原始地层下与采空区下开采时的矿压显现规律。数值模拟方面,运用UDEC数值模拟软件模拟在原始地层下及采空区下开采6#煤层时上覆岩层的运移,结合物理相似模拟修正直接顶、老顶的初次跨落步距,老顶周期来压步距,关键层的断裂位置等,通过数值模拟加深了对煤层上覆岩层破断、运移的认识。通过三种研究方法的相互借鉴、联系、修正,最后完成了对龙王沟煤矿特厚煤层在原始地层下与采空区下大采高开采矿压显现规律的对比研究。
[Abstract]:Longwanggou coal mine is located in the central part of Zhunger coalfield in Ordos, Inner Mongolia. The main coal seam No. 6 of Longwanggou Coal Mine is an ultra-thick coal seam near the level. In order to study the similarities and differences of the law of mine pressure behavior when the near horizontal and super thick coal seams are mined with large mining height and large caving height under the original strata and under the goaf, theoretical analysis and physical similarity simulation are used in this study. Numerical simulation method is used to compare the behavior of mine pressure under the original strata and the goaf in the mining of high mining height and big caving height of the extra thick coal seam. In theoretical analysis, according to the thickness and lithology of the overlying strata, the thickness and position of the direct roof, the main roof and the key layer are determined by calculation and analysis. The primary pressure step distance and periodic pressure step distance of the main roof, key layer and so on are calculated. These analyses and calculations theoretically illustrate the law of overburden movement and rock pressure behavior in coal seam No. 6. In the aspect of physical similarity simulation, through the physical similarity simulation in the laboratory, the primary pressure step distance, the periodic pressure step distance, the supporting pressure distribution of the coal seam floor during mining under the original stratum and under the goaf are measured. Migration of overlying strata on coal seam. Physical similarity simulation combined with theoretical analysis further clarifies the law of rock pressure behavior when mining under the original stratum and goaf. In the aspect of numerical simulation, UDEC software is used to simulate the migration of overlying strata when mining 6 # coal seam under the original stratum and goaf. Combined with the physical similarity simulation, the direct roof, the first step distance of the main roof, the pressure step distance of the main roof period are corrected. Through numerical simulation, the fracture location of the key strata has deepened the understanding of the fracture and migration of the overlying strata on the coal seam. Through the mutual reference, connection and correction of three kinds of research methods, a comparative study on the behavior of mining pressure in the super-thick coal seam of Longwanggou coal mine under the original stratum and under the goaf is completed.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD323

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