钱营孜煤矿构造发育特征及复杂程度定量评价
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摘要
地质构造是影响矿井安全生产的主要地质因素,直接制约着生产计划的安排和采掘方式的选择。钱营孜煤矿为新建矿井,地质构造比较复杂且发育规律不清,给生产管理带来不利影响,为保障煤矿安全生产,深入开展矿井地质构造规律分析研究,进行地质构造成因机制分析及复杂程度分区评价,已成当务之急。
论文通过分析整理采掘资料,以F22和F17断层为界将全矿井自西向东分为三个分区,研究了断层发育规律,得出矿井发育的断层类型有正断层、逆断层和枢纽断层,以正断层为主,占65%,逆断层较发育,断层规模以落差小于20m的中小断层为主；矿井内正断层切割逆断层,发育地垒、地堑、阶梯状和叠瓦状等断层组合,断层发育逐级控制；利用断层密度、断层强度和断裂分维值对断层发育强度进行定量分析,得出一区和三区断层密度和断裂分维值较大,二区较小。
分析研究褶皱构造展布特征,得出矿井主体褶皱为向南东仰起的宽缓向斜。F25断层以西发育轴向东西的褶皱构造,F25断层以东发育轴向北东的褶皱构造,者大致以F25逆断层分隔。利用褶皱平面变形系数对褶皱构造变形程度进行定量分析,得出平面变形系数高值区基本都位于褶皱的轴部及其附近区域。
分析研究钱营孜煤矿构造的形成期次,并根据矿井地质构造形态和组合规律分析了古构造应力场,得出矿区构造格架是印支期、燕山早期、燕山晚期和喜山晚期多期构造运动形成的结果,喜山早期构造运动对矿井构造影响不大。
利用测井曲线并结合煤体结构宏观特征井下观察对32煤层煤体结构进行解译,分析了构造煤分布特征,得出三区构造煤发育最强烈,厚度普遍在0.3m以上,一区次之,二区构造煤发育较弱,构造煤发育强度与断裂分维值以及平面变形系数总体上呈现正相关关系。
选取断层密度、断层强度、断裂分维值、褶皱平面变形系数和构造煤厚度五个评价指标,利用灰色模糊综合评价方法对钱营孜煤矿构造复杂程度进行定量评价,编制了构造复杂程度综合分区图,得出整个研究区以构造较简单区和构造较复杂区为主,构造简单区和构造复杂区占的比重较小,呈零星分布趋势,为煤矿采掘工程设计提供地质依据。
Geological structure is the main geological factors that affect mine safety production, it directly restricts the production plan arrangement and the choice of the ways of mining. Qian Ying Zi coal mine is a new mine, geological structure is complicated and development law is unclear, bring production management adverse effects to ensure coal mine safety production, making a thorough study on mine geology structure rule, mechanism analysis of geological tectonic formation and zoning evaluate of complicated degree, become an urgent task.
By analyzing and arranging Qian Ying Zi coal mine's mining data, taking F22 and F17 fault for boundary all mine from west to east is divided into three regions, and study tectonic development rules based on this, obtained that mine development fault types are normal faults, reverse faults and hinge faults, normal faults are the main, accounting for 65%, reverse fault relatively developed,fault size uses small middle fault age that gap less than 20m as main faults; normal faults cut reverse faults in coal mine, fault combination such as development horst, graben, stepladder and imbricate, fault development is controlled step by step; quantitative analysis of fault development by using fault density, fault strength and fractal dimension, fault density and fractal dimension is larger in the first and third area, the second area is smaller.
Analysis the character of fold structure exhibition, elicit that the main fold is width sustained syncline that lifted from south east. West of F25 fault developed EW direction fold structure, east of F25 fault developed NE direction fold structure the two is separated by F25 reverse fault. Quantitative analysis of fold deformation by using fold plane deformation coefficient, elicit that plane deformation coefficients high values are located in fold axis and its surrounding area.
Analysis and research of Qian Ying Zi coal mine's structure formation times, and according to the mine geology tectonic form and combination rule analysis of ancient tectonic stress field, elicit that structural lattice frame is the results of indo-Chinese epoch and Yanshan early, late Yanshan period of tectonic movement and XiShan late forming, early Himalayan tectonic movement is little affected to mine tectonic.
Interpretation of the 32 structure coal seam by using logging curve combined with observed macroscopic characteristics of underground coal structure, analysis tectonic coal distribution characteristics, elicit that the third area's tectonic coal development is the strongest, in general the thickness is more than 0.3m, the first area takes second place, tectonic coal development of the second area is relatively weak, tectonic coal development strength and fracture fractal dimension and the plane deformation coefficient presents positive correlation.
Select fault density, fault strength and fracture fractal dimension, plane deformation coefficient and tectonic coal thickness five evaluation indexes, by using the grey fuzzy comprehensive evaluation method to quantitative evaluate Qian Ying Zi coal mine's tectonic complexity,make mine tectonic complexity comprehensive zoning maps, elicit that the entire study area take relatively simple structure and relatively complex structure as main, simple structure area and complex structure area take up a smaller proportion, show sporadic distribution trend, consistent with the production of exposed, provides geological basis for coal mining engineering design.
论文通过分析整理采掘资料,以F22和F17断层为界将全矿井自西向东分为三个分区,研究了断层发育规律,得出矿井发育的断层类型有正断层、逆断层和枢纽断层,以正断层为主,占65%,逆断层较发育,断层规模以落差小于20m的中小断层为主；矿井内正断层切割逆断层,发育地垒、地堑、阶梯状和叠瓦状等断层组合,断层发育逐级控制；利用断层密度、断层强度和断裂分维值对断层发育强度进行定量分析,得出一区和三区断层密度和断裂分维值较大,二区较小。
分析研究褶皱构造展布特征,得出矿井主体褶皱为向南东仰起的宽缓向斜。F25断层以西发育轴向东西的褶皱构造,F25断层以东发育轴向北东的褶皱构造,者大致以F25逆断层分隔。利用褶皱平面变形系数对褶皱构造变形程度进行定量分析,得出平面变形系数高值区基本都位于褶皱的轴部及其附近区域。
分析研究钱营孜煤矿构造的形成期次,并根据矿井地质构造形态和组合规律分析了古构造应力场,得出矿区构造格架是印支期、燕山早期、燕山晚期和喜山晚期多期构造运动形成的结果,喜山早期构造运动对矿井构造影响不大。
利用测井曲线并结合煤体结构宏观特征井下观察对32煤层煤体结构进行解译,分析了构造煤分布特征,得出三区构造煤发育最强烈,厚度普遍在0.3m以上,一区次之,二区构造煤发育较弱,构造煤发育强度与断裂分维值以及平面变形系数总体上呈现正相关关系。
选取断层密度、断层强度、断裂分维值、褶皱平面变形系数和构造煤厚度五个评价指标,利用灰色模糊综合评价方法对钱营孜煤矿构造复杂程度进行定量评价,编制了构造复杂程度综合分区图,得出整个研究区以构造较简单区和构造较复杂区为主,构造简单区和构造复杂区占的比重较小,呈零星分布趋势,为煤矿采掘工程设计提供地质依据。
Geological structure is the main geological factors that affect mine safety production, it directly restricts the production plan arrangement and the choice of the ways of mining. Qian Ying Zi coal mine is a new mine, geological structure is complicated and development law is unclear, bring production management adverse effects to ensure coal mine safety production, making a thorough study on mine geology structure rule, mechanism analysis of geological tectonic formation and zoning evaluate of complicated degree, become an urgent task.
By analyzing and arranging Qian Ying Zi coal mine's mining data, taking F22 and F17 fault for boundary all mine from west to east is divided into three regions, and study tectonic development rules based on this, obtained that mine development fault types are normal faults, reverse faults and hinge faults, normal faults are the main, accounting for 65%, reverse fault relatively developed,fault size uses small middle fault age that gap less than 20m as main faults; normal faults cut reverse faults in coal mine, fault combination such as development horst, graben, stepladder and imbricate, fault development is controlled step by step; quantitative analysis of fault development by using fault density, fault strength and fractal dimension, fault density and fractal dimension is larger in the first and third area, the second area is smaller.
Analysis the character of fold structure exhibition, elicit that the main fold is width sustained syncline that lifted from south east. West of F25 fault developed EW direction fold structure, east of F25 fault developed NE direction fold structure the two is separated by F25 reverse fault. Quantitative analysis of fold deformation by using fold plane deformation coefficient, elicit that plane deformation coefficients high values are located in fold axis and its surrounding area.
Analysis and research of Qian Ying Zi coal mine's structure formation times, and according to the mine geology tectonic form and combination rule analysis of ancient tectonic stress field, elicit that structural lattice frame is the results of indo-Chinese epoch and Yanshan early, late Yanshan period of tectonic movement and XiShan late forming, early Himalayan tectonic movement is little affected to mine tectonic.
Interpretation of the 32 structure coal seam by using logging curve combined with observed macroscopic characteristics of underground coal structure, analysis tectonic coal distribution characteristics, elicit that the third area's tectonic coal development is the strongest, in general the thickness is more than 0.3m, the first area takes second place, tectonic coal development of the second area is relatively weak, tectonic coal development strength and fracture fractal dimension and the plane deformation coefficient presents positive correlation.
Select fault density, fault strength and fracture fractal dimension, plane deformation coefficient and tectonic coal thickness five evaluation indexes, by using the grey fuzzy comprehensive evaluation method to quantitative evaluate Qian Ying Zi coal mine's tectonic complexity,make mine tectonic complexity comprehensive zoning maps, elicit that the entire study area take relatively simple structure and relatively complex structure as main, simple structure area and complex structure area take up a smaller proportion, show sporadic distribution trend, consistent with the production of exposed, provides geological basis for coal mining engineering design.
引文
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