毛集—二郎坪断陷带中的主体构造格架是复式倒转褶皱系。中央是朱庄（河前庄）—板山坪—太平镇主背斜带，南、北两侧各有两个倒转向斜构造。南侧为大庙—青山倒转向斜和张家大庄倒转向斜；北侧为石灰窑倒转向斜和彭老家倒转向斜。这一复式倒转褶皱系的发现及确立，对断陷带中二郎坪群及其相关地层的划分对比和海相火山岩型金、银、铁、铜、硫等矿产勘查工作具有重要意义 The main tectonic framework in the Maoji-Erlangping Depression Belt is a complex inverted fold system. The center is Zhuzhuang (river front Zhuang) - Ban Shan Ping - Taiping town main anticline, south and north sides have two inverted syncline structure. The south side of the temple - Castle Peak inversion and Zhang Dazhuang inverted steering; north of the lime kiln reversing syncline and Peng home reversing syncline. The discovery and establishment of this double overturned fold system is of great significance to the comparison of Erlangping Group and its related strata in the fault zone and the prospecting work of marine volcanic rocks such as gold, silver, iron, copper and sulfur