煤炭资源开采沉陷地质环境响应研宄

发布时间：2018-06-25 00:27

  本文选题：煤炭资源 + 开采沉陷　； 参考：《中国地质大学(北京)》2015年硕士论文

【摘要】：开采沉陷是煤炭资源开发引起的矿山环境问题之一,建立开采沉陷影响因素与治理方法间的关联性对煤炭开采沉陷治理工作具有重要指导作用,开采沉陷地质环境响应作为关联性研究的重要环节其研究意义显著。目前开采沉陷治理对开采沉陷的影响因素、地表变形特点及其对治理技术的要求等方面关注不够,对开采沉陷治理技术与地质环境背景、开采开发条件等客观因素的关联性研究不足。本文根据内蒙古自治区开采沉陷调查工作,整理了前人对开采沉陷类型、特点、机理等方面的研究,厘定开采沉陷主要影响因素。根据正交试验的思路构建开采沉陷影响因素数值模拟模型,采用FLAC3D数值模拟进行开采沉陷对各个影响因素的敏感性分析,结合内蒙自治区开采沉陷的现状,总结了不同因素影响下开采沉陷导致的地面变形的特点,并结合内蒙开采沉陷工程实例介绍了开采沉陷地质环境响应分析的工程应用。本文根据对开采沉陷影响因素及其地质环境响应的分析,得出以下几点认识和成果:(1)通过内蒙古自治区煤炭矿山开采沉陷调查,整理得到典型矿区开采沉陷发生情况与发生特点。(2)敏感性分析表明,开采沉陷地表变形破坏程度最大的因素组合为:“70+30采深”+“粘土”+“负地形”+“软岩”+“60°(急倾煤层)”;开采沉陷影响因素中,覆盖层性质和地形条件敏感性不显著,开采深度敏感性显著,岩性组合与煤层产状敏感性高度显著。(3)开采深度影响开采沉陷的地质环境响应表现为地表影响范围及变形深浅;岩性组合对开采沉陷地质环境响应的影响体现在地表变形、破坏的程度和形状;煤层产状对开采沉陷地质环境响应的影响主要表现在发生变形破坏后开采沉陷变形区底部形态方面。(4)通过开采沉陷各影响因素地质环境响应特点与治理技术的关系,构建了地质环境背景与开采沉陷治理技术的关联性。(5)以大雁一矿缓倾煤层煤矿和白云煤矿急倾斜煤矿为例,分析得出了开采沉陷的发展趋势:大雁一矿开采沉陷可能继续发生,主要以沉陷盆地为主,局部可能发生塌陷坑,沉陷盆地变形均匀、完整;白云煤矿开采沉陷可能继续发生,主要以塌陷坑为主,局部发生塌陷槽,塌陷坑或塌陷槽底部不平整。
[Abstract]:Mining subsidence is one of the mining environmental problems caused by the exploitation of coal resources. The environmental response of mining subsidence as an important link in the study of correlation is of great significance. At present, the influence factors of mining subsidence treatment on mining subsidence, the characteristics of surface deformation and the requirements of remediation technology are not enough, and the mining subsidence treatment technology and geological environment background are not enough. Research on the relevance of objective factors such as mining and development conditions is insufficient. Based on the investigation of mining subsidence in Inner Mongolia Autonomous region, this paper has sorted out the previous researches on the types, characteristics and mechanism of mining subsidence, and determined the main influencing factors of mining subsidence. According to the idea of orthogonal test, the numerical simulation model of influencing factors of mining subsidence is constructed, and the sensitivity of mining subsidence to each factor is analyzed by using FLAC3D numerical simulation, combined with the present situation of mining subsidence in Inner Mongolia Autonomous region. This paper summarizes the characteristics of surface deformation caused by mining subsidence under the influence of different factors, and introduces the engineering application of mining subsidence geological environment response analysis combined with the example of mining subsidence engineering in Inner Mongolia. Based on the analysis of the influencing factors of mining subsidence and its geological environment response, this paper draws the following conclusions and achievements: (1) through the investigation of coal mining subsidence in Inner Mongolia Autonomous region, Finally, the occurrence and characteristics of mining subsidence in typical mining areas are obtained. (2) sensitivity analysis shows that, The most serious factors of surface deformation and failure in mining subsidence are as follows: "7030 mining depth," clay "," negative topography, "soft rock", "60 掳(steep coal seam)", and among the factors affecting mining subsidence, The sensitivity of overburden property and topographic condition is not significant, the sensitivity of mining depth is significant, the sensitivity of lithologic combination and coal seam occurrence is highly significant. (3) the geological environment response of mining depth affecting mining subsidence is as follows: surface influence range and deformation depth; The effect of lithologic combination on the geological environment response of mining subsidence is reflected in the degree and shape of surface deformation, damage and damage. The influence of coal seam occurrence on the geological environment response of mining subsidence is mainly manifested in the bottom shape of mining subsidence deformation area after deformation failure. (4) the relationship between the geological environment response characteristics of mining subsidence and the treatment technology is discussed. The relationship between geological environment background and mining subsidence treatment technology is constructed. (5) taking the coal seam with gentle dip and the steep inclined coal mine in Baiyun Coal Mine as examples, the development trend of mining subsidence is obtained: mining subsidence may continue to occur in Dayanyi Mine. The subsidence basin is mainly composed of subsidence basin, local collapse pit may occur, the subsidence basin deformation is uniform and intact; Baiyun coal mine mining subsidence may continue to occur, mainly in collapse pit, local collapse trough, collapse pit or collapse trough bottom is uneven.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P642.26

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