摘要
矿井水害事故与井田地质构造有着密切关系,科学评价井田构造复杂程度对矿井安全开采具有重要意义。以霄云煤矿为研究对象,选取断层分维值、断层密度、断层尖灭点及交点个数、断层强度指数作为影响矿井构造复杂程度的评价指标,基于灰色关联度(GRD)提出的一种改进的堆栈算法(Stacking)进行指标加权计算,获得矿井构造复杂程度主控因素的权重,建立矿井构造复杂程度定量评价模型。根据该评价模型,将研究区划分为构造破坏区、构造影响区和地层完整区。通过岩心采取率验证了构造复杂程度分区的有效性和合理性。结果表明:研究区构造破坏区主要集中在矿井中部和东部的区域,构造影响区主要集中在矿井中部,岩层完整区主要分布在矿井南部和北部区域。岩层完整区的岩心采取率为87.47%,构造影响区的岩心采取率为76.02%,构造破坏区的岩心采取率为62.09%。评价结果与岩心采取率验证结果吻合,与煤矿实际揭露情况基本一致,证明了评价模型的合理性,为矿井的高效安全生产提供了指导依据。
Mine flood accidents are closely related to the geological structure of the mine field,scientific evaluation of the complexity of the mine field structure is of great significance to the safe mining.Taking Xiaoyun Coal Mine as the research object,fault fractal dimension value,fault density,number of fault pinch points and intersections and fault strength index are selected as the evaluation indexes affecting the complexity of mine structure,and an improved stack algorithm(Stacking) based on grey correlation degree(GRD) is proposed for index weighting calculation,with the weight of the main controlling factors,the quantitative evaluation model of the mine structure complexity is established.According to the evaluation model,the study area is divided into tectonic failure area,tectonic influence area and stratigraphic integrity area.The effectiveness and rationality of structural complexity zoning are verified by core recovery rate.The results show:the structural damage area is mainly concentrated in the middle and east of the mine,the structural influence area is mainly concentrated in the middle of the mine,and the rock stratum integrity area is mainly in the south and north of the mine.The core recovery rate of rock stratum intact area,structure affected area and structure damaged area is 87.47%,76.02% and 62.09%,respectively.The evaluation results are consistent with the verification results of core recovery rate and basically consistent with the actual disclosure in the coal mine,which proves the rationality of the evaluation model.
作者
施龙青
赵威
刘天浩
翟培合
王钊
吕昌兴
SHI Long-qing;ZHAO Wei;LIU Tian-hao;ZHAI Pei-he;WANG Zhao;LYU Chang-xing(College of Geosciences and Engineering,Shandong University of Science and Technology,Qingdao266590,China;Shanxi Guojiahe Coal Industry Co.,Ltd.,Baoji721505,China;Huafeng Coal Mine,Xinwen Mining Group Co.,Ltd.,Taian 272213,China)
出处
《煤炭工程》
北大核心
2022年第8期142-148,共7页
Coal Engineering
基金
山东省自然科学基金重点项目(ZR2020KE023)
国家自然科学基金资助项目(51804184,41807283,42002282)。
关键词
构造复杂程度
霄云煤矿
定量评价
改进的堆栈算法
灰色关联度
岩心采取率
structural complexity
Xiaoyun Coal Mine
quantitative evaluation
improved stack algorithm
grey relational degree
core extraction
