淮南顾桥煤矿层滑构造形成机制探讨

通过对淮南顾桥煤矿构造应力场解析及工作面层滑构造等引起的异常区展布统计分析，并结合模拟实验手段，对顾桥矿区层滑构造形成机制进行了探讨。研究认为，顾桥矿区印支期以来至少经历了2期挤压构造应力场作用；工作面发育顶底皆断、顶断底不断和底断顶不断3种类型的正断层，层滑变薄区和正断层呈近东西方向展布；近东西方向的挤压应力场是形成顾桥矿层滑构造的力学机制。模拟实验表明，层滑变薄区展布与伸展方向近于垂直，正断层是层滑变薄区的边界，层滑变薄区具有成带性、方向性和间隔性。

A Discussion on Interlayer Gliding Structure Formation Mechanism in Guqiao Coalmine, Huainan

According to statistical analysis of tectonic stress field analyzing and abnormal area distribution caused by working face interlayer gliding structures, and combined with simulation experiment means discussed interlayer gliding structure formation mechanism. The study considered that at least 2 stages of compressive tectonic stress field process have been experienced in the Guqiao coalmine area since the Indo-Chinese Epoch. Three types of normal fault with both faulted roof and floor, faulted roof and faulted floor have developed on working faces, glided thinning area and normal faults present near EW directional distribution, thus the near EW compressive stress field is the dynamic mechanism to form interlayer gliding structures in Guqiao coalmine. The simulation experiment has demonstrated that the glided thinning area distribution is near normal to extensional direction; normal faults formed boundaries of glided thinning areas, and the thinning areas are provided with zonal, directional and alternational characters.