东欢坨矿构造特征及断裂构造定量研究

Structural Features and Fault Quantitative Study in Donghuantuo Coalmine

基于物探、钻探等资料,采用地质统计法对东欢坨矿区构造要素进行分析,探讨了断层发育规模、空间展布特征及断层要素与断层性质的相关关系,建立了不同性质断层的落差与延展长度之间的经验公式,从古构造应力场演化角度分析了断裂展布的成因。研究表明:区内地质构造以NE向断层为主,以车轴山向斜轴为界,表现为"两翼分区"、"西逆东正",全区呈现"南北分带"、"南密北稀"的展布特征。定量分析认为断层落差与延伸长度呈正相关关系,断裂密度等值线呈现明显分区性,断裂强度由SE-NE逐渐减弱。

Based on geophysical prospecting and drilling data, analyzed structural essentials in the Donghuantuo coalmine; discussed correlativity between fault developmental dimension, spatial spreading feature, fault essentials and fault nature; established empirical relations between throw and extending length of miscellaneous faults; analyzed fault spreading reason in terms of paleotectionic stress field evolution. The research has demonstrated that： structures in the area are mainly NE faults, to take the Chezhoushan syncline axis as the boundary, appear as ＂limbs partitioning＂, ＂reverse in the west, normal in the east＂, areal spreading characters are ＂north, south zoning＂ and ＂thick in south, sparse in north＂. The quantitative analysis has found out the relation between fault throw and spreading length is positively correlated, the fault density contour has obvious partitioning, faulting intensity decreases from southeast to northeast gradually.