辽宁省抚顺矿区宏观地质结构及其工程效应分析

Analysis of the geological structures in Fushun Mine area and its engineering effects

抚顺采煤已有百余年历史,由于各种原因造成了一系列地质灾害:滑坡、矿震、地表沉陷和地裂缝等。矿区的中部和西部的形成带状的地表拉裂和建筑物破坏;软岩区形成大面积的地表沉陷,硬岩区形成脆性和线性拉裂,这些现象与矿区地质结构是分不开的。通过对矿区地质结构和矿区地层构造演化研究,认为抚顺矿区地质灾害是发生在花岗岩与火山岩之间的"凹槽"内,是有限的。根据矿区主断层F1、F1A交汇点位置,将矿区地质结构类型划分为三种类型,并通过FLAC二维数值计算对三种类型的典型剖面进行了数值模拟和验证,合理地解释了矿区地质灾害的产生机理和发展趋势,为抚顺矿区地质灾害综合治理和采煤规划提供了科学依据。采用地质结构控制论来研究城市地质灾害提供了新的思路和方法。

Fushun coal mining has over a hundred years of history,a series of geological disasters were caused by various reasons： such as landslides,mine earthquake,ground subsidence and ground fissures.The linear distribution of surface crack and destroyed buildings are found in the central mine area and its western.The ground subsidence appears in the soft rock area,brittle and linear crack shows in the hard rock area,this phenomenon are inseparable from the geological structure of the mina area.The geological disasters of Fushun mining area is only limited in between the granite and volcanic rock ＂groove＂ by studying the formation of geological structure and the tectonic evolution.According to the location of intersection of the main fault zone F1and F1A the geological structure of Fushun mine area is divided into three types,the two-dimensional simulation is executed by using FLAC for three typical geological profiles.The numerical results can reasonably explain the formation mechanism of geological hazards and trends,and provides some scientific suggests for the comprehensive management of geological disasters and coal mining in Fushun mining area.Using the Control theory of geological structure is a new method to study the geological disasters in cities.