论中国煤矿中的叠加褶皱

中国煤矿中的叠加褶皱发育普遍。形态复杂。类型繁多。根据不同期农构造应力或是一次应力的递进变形作用以及构造叠加的特征和强度，将中国煤矿中发育的叠加褶皱划分为增强型、寄生型、包容型。交接型、镶边型、跨越型、弯褶型和重褶型等8类。其中增强型又分紧闭增强和倒转增强；交接型又分为丁字形组合、新月形组合。菱形组合和分叉形组合；跨越型再分为横跨褶皱与斜跨褶皱。这些褶皱的特征是处于地表浅层次、规模较小、叠加改造的强度相对较弱，并常与断裂构造伴生。在煤矿中进行叠加褶皱的研究，对分析区域构造形变史。查明和预测煤层赋存规律。研究煤的耗散流变以及预防谋与瓦斯突出都具有重要作用。

DISCUSSION ON SUPERPOSED FOLDS IN COAL MINES OF CHINA

China is the first country to preduce coals in the world. The supenyd folds in thecoal beds are generally developed, and their forms are rather complex and are of various types.Based on their vtheus tectonic pressure or progressive deforrnation reciprocity and their superposed character and intensity, the supewt folds can be divided into eight types, i. e., the enhancement, parasitic, containrnnt, conoined, rirnmed, overlap, flexural fold and the refold. Among them, the enhancement type can be divided into two subtpo: The tight enhancemntand the overturned enhancement; conjoined type can be divided into four subtypes: T-shaped,crescent, diamond and bifurcate shaped combination; overlap type can also be divided into twosubtypes: cross-folds and diagonal folds. On the whole, all the supempd folds are of superficialshallow levels and their scales are small, the supeped reconstructive intensity is comarativelyweak and frequently these supeped folds appear to be accompanied with fault structtires. Thestudy of superposed folds plays an important role in analysing regional geological tectonic deformed history, in predicting occurrence regularity of ed beds in unexposed regions, in studyingdissipative rheology of coal, in searhing thick coal belts of gliding flow, in recognizing gas enrichrnental regularity and in predicting coal and gas outburst.