淮北祁东煤矿构造煤中微量元素迁移聚集的构造控制
发布时间：2018-11-10 20:58
【摘要】：本文在区域构造及矿井构造特征分析的基础上,系统采集典型构造煤样品,并借助电感耦合等离子体质谱法(ICP-MS)和冷蒸汽-原子荧光光谱法(CVAFS)等先进测试方法,测定不同类型构造和不同变形程度构造煤中微量元素的含量;结合构造煤形成的应力-应变环境分析,探讨了构造煤中微量元素的分布特征及应力敏感元素迁移、聚集的动力学机制,取得了以下主要成果和认识。(1)深入分析了祁东矿构造发育特征及其分布规律,定量评价了32煤层断裂发育程度。祁东矿断层较发育,走向多为NNE及NE向,褶皱发育较弱,层滑构造较为常见;矿井构造发育规模、方向性和分区性等方面具有一定规律性,构造规模以次级小构造为主,断裂构造的展布具有等距性;现今构造格局是多期构造叠加和改造的结果;断裂容量维高值区主要发育大中型断层与小断层均发育区或者小断层密集发育区。(2)系统划分了祁东矿构造煤类型,初步探讨了构造煤变形的应力-应变环境。将祁东矿构造煤划分为碎裂煤、碎斑煤、碎粒煤、碎粉煤、片状煤、鳞片煤、揉皱煤和糜棱煤8类;根据应力作用及煤变形特征,构造煤变形的应力-应变环境可分为挤压和拉张脆性碎裂变形环境、剪切脆性及脆韧性变形环境和剪切与挤压韧性变形环境。(3)系统揭示了不同类型构造煤中微量元素的分布规律。通过32煤层不同类型构造煤中微量元素的分布特征分析,将构造煤中微量元素的分布分为线性递增型、反“L”型、“N”型、“M”型和“W”型5种类型,探讨了元素迁移聚集与构造煤变形程度的内在联系。(4)揭示了敏感元素迁移、聚集的构造控制机理。构造应力作用是煤体变形的关键因素,也是煤中元素迁移聚集的主要推动力,是影响构造煤中应力敏感元素迁移的主导因素,控制着构造煤中敏感元素迁移的过程;不同类型构造形成了不同的物理化学环境,对元素的迁移聚集产生不同影响;不同类型构造中构造煤的发育规律不同,其实质是形成构造及构造煤的应力-应变环境存在差异,构造类型及其形成的应力-应变环境是导致不同类型的应力敏感元素分异的重要因素。
[Abstract]:Based on the analysis of the regional structure and the structural characteristics of the mine, the typical structural coal samples are collected systematically, and advanced testing methods such as inductively coupled plasma-mass spectrometry (ICP-MS) and cold vapor atomic fluorescence spectrometry (CVAFS) are used in this paper. The contents of trace elements in coal of different types of structures and different degrees of deformation were determined. Based on the stress-strain environment analysis of tectonic coal formation, the distribution characteristics of trace elements in tectonic coal and the dynamic mechanism of migration and accumulation of stress-sensitive elements are discussed. The main achievements and understandings are as follows: (1) the structural development characteristics and their distribution of Qidong Mine are analyzed, and the fault development degree of 32 coal seam is quantitatively evaluated. The faults of Qidong ore are relatively developed, the strike is NNE and NE, the fold is weak, and the layer-slip structure is more common. The development scale, directionality and zoning of mine structures have certain regularity, the scale of structures is dominated by minor structures, the distribution of fault structures is equidistant, and the present tectonic pattern is the result of the superposition and transformation of multi-stage structures. The fault capacity high value area is mainly developed in both large and medium faults and small faults or small fault dense areas. (2) the tectonic coal types in Qidong Mine are systematically divided and the stress-strain environment of tectonic coal deformation is preliminarily discussed. The tectonic coal of Qidong Mine is divided into 8 types: broken coal, broken spot coal, broken grain coal, pulverized coal, flake coal, scale coal, crumpled coal and mottled coal. According to the stress action and the characteristics of coal deformation, the stress-strain environment of tectonic coal deformation can be divided into extrusion and tensioning brittle fracture deformation environment. Shear brittleness and brittle ductile deformation environment and shearing and extruding ductile deformation environment. (3) the distribution of trace elements in different types of tectonic coals is revealed systematically. By analyzing the distribution characteristics of trace elements in different types of structural coal in 32 coal seam, the distribution of trace elements in structural coal is divided into five types: linear incremental type, inverse "L" type, "N" type, "M" type and "W" type. The internal relationship between the migration and accumulation of elements and the degree of deformation of tectonic coal is discussed. (4) the tectonic control mechanism of migration and accumulation of sensitive elements is revealed. Tectonic stress is the key factor of coal deformation and the main driving force of migration and accumulation of elements in coal. It is the leading factor that affects the migration of stress-sensitive elements in tectonic coal and controls the process of migration of sensitive elements in tectonic coal. Different types of structures form different physical and chemical environments, which have different effects on the migration and accumulation of elements. The development law of tectonic coal is different in different types of tectonics, the essence of which is the difference of tectonic formation and stress-strain environment of tectonic coal. Tectonic types and their stress-strain environments are important factors leading to the differentiation of different types of stress-sensitive elements.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.11
本文编号：2323596
[Abstract]:Based on the analysis of the regional structure and the structural characteristics of the mine, the typical structural coal samples are collected systematically, and advanced testing methods such as inductively coupled plasma-mass spectrometry (ICP-MS) and cold vapor atomic fluorescence spectrometry (CVAFS) are used in this paper. The contents of trace elements in coal of different types of structures and different degrees of deformation were determined. Based on the stress-strain environment analysis of tectonic coal formation, the distribution characteristics of trace elements in tectonic coal and the dynamic mechanism of migration and accumulation of stress-sensitive elements are discussed. The main achievements and understandings are as follows: (1) the structural development characteristics and their distribution of Qidong Mine are analyzed, and the fault development degree of 32 coal seam is quantitatively evaluated. The faults of Qidong ore are relatively developed, the strike is NNE and NE, the fold is weak, and the layer-slip structure is more common. The development scale, directionality and zoning of mine structures have certain regularity, the scale of structures is dominated by minor structures, the distribution of fault structures is equidistant, and the present tectonic pattern is the result of the superposition and transformation of multi-stage structures. The fault capacity high value area is mainly developed in both large and medium faults and small faults or small fault dense areas. (2) the tectonic coal types in Qidong Mine are systematically divided and the stress-strain environment of tectonic coal deformation is preliminarily discussed. The tectonic coal of Qidong Mine is divided into 8 types: broken coal, broken spot coal, broken grain coal, pulverized coal, flake coal, scale coal, crumpled coal and mottled coal. According to the stress action and the characteristics of coal deformation, the stress-strain environment of tectonic coal deformation can be divided into extrusion and tensioning brittle fracture deformation environment. Shear brittleness and brittle ductile deformation environment and shearing and extruding ductile deformation environment. (3) the distribution of trace elements in different types of tectonic coals is revealed systematically. By analyzing the distribution characteristics of trace elements in different types of structural coal in 32 coal seam, the distribution of trace elements in structural coal is divided into five types: linear incremental type, inverse "L" type, "N" type, "M" type and "W" type. The internal relationship between the migration and accumulation of elements and the degree of deformation of tectonic coal is discussed. (4) the tectonic control mechanism of migration and accumulation of sensitive elements is revealed. Tectonic stress is the key factor of coal deformation and the main driving force of migration and accumulation of elements in coal. It is the leading factor that affects the migration of stress-sensitive elements in tectonic coal and controls the process of migration of sensitive elements in tectonic coal. Different types of structures form different physical and chemical environments, which have different effects on the migration and accumulation of elements. The development law of tectonic coal is different in different types of tectonics, the essence of which is the difference of tectonic formation and stress-strain environment of tectonic coal. Tectonic types and their stress-strain environments are important factors leading to the differentiation of different types of stress-sensitive elements.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.11
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