摘要
笔者根据现有地质资料,结合矿井考察,提出了杨梅山煤矿现在开采的煤层,也属推覆体的新认识。煤矿井巷所揭露的构造为燕山早期所形成,其主压结构面近南北向,两组斜交剪断面为北东及南东向,並有一组张断面与之直交。印支期构造为含煤沉积提供了场所,燕山早期构造对它进行初次改造,主要表现为褶曲和断裂,燕山晚期至喜山期构造对它再次改造,主要表现为逆冲断裂,有三层推覆体形成。根据这些规律,为井下开采预测可能出现的构造、追索煤层提供依据,並预测矿区东南部可能存在有广东丰田式的煤产地。
Based on the available geologic data, combined with the investigation to the mine, the authors put forward some new understandings that the presently-mined coal beds belongs to nappe structure. The structures exposed in the mining shafts are considered to have formed in early Yanshanian Period, their principal compressional structural plane trending nearly meridional, two crossed shear fault planes trending northeast and southeast, which are directly crossed by a set of tensile fault plane. The Indo-Sinian tectonics provided places for coal-bearing sedimentation, which was primary reworked by early Yanshanian tectonics, manifested mainly by foldings and faults, and transformed again by late Yanshanian and Himalaya tectonics, manifested mainly by overthrust fault, in which three layers of nappe formed. These understandings provide bases for predicting the possibly-occurred structures and tracing coal seams in the mining process, and they are based to predict that there possibly exist Fengtian type (Guangdong) coal districts in the southeast side of the mine.
出处
《湖南地质》
1992年第1期49-52,共4页
Hunan Geology
关键词
煤田
预测
推覆构造
地洼区
Geodepression region
Nappe structure
Prognosis of coalfield
Yangmeishan
