抚顺煤田东部地表变形特征及成因机制分析

EAST OF FUSHUN COAL FIELD GROUND SURFACE DEFORMATION CHARACTERISTICS AND GENETIC MECHANISM ANALYSIS

根据现场调查、勘查成果,在煤田地质环境条件分析的基础上,通过地质构造特征和水文地质特征的分析,总结了老市政府-榆林桥南-天湖桥南地区的地表变形特征。受采煤活动引发的断层活化效应作用,榆林桥南地区地表变形最为强烈,伴随地面沉陷发育有4条地裂缝,其次为老市政府地区发育有一条地裂缝,而天湖桥南地区未见采煤活动引发的变性破坏。在此基础上划分出硬岩区倾倒拉张破坏型、软岩区地表移动沉陷破坏型、浅层地表塌陷破坏型3种成因破坏模式,最后从岩体的长期蠕变效应、地质构造差异效应、采充效应、充填体低刚度效应、采煤的采空效应、重复采动效应、矿震效应等方面总结了变形影响因素。总体而言采煤活动是直接的主要诱发因素是外因,地质结构是控制因素是内因,二者相互作用缺一不可。

according to site survey,and exploration results,in coalfield geological environ-ment conditions analysis of based Shang,through geological structure features and hydrolog-ical geological features of analysis,summary has old municipal government-Yulin Bridge South-Lake Bridge South area of surface deformation features,by mining activities raised of fault activation effect role,Yulin Bridge South area surface deformation most strongly,with ground subsidence development has four article to crack,second for old municipal govern-ment area development has a article to crack,and Lake Bridge South area not see mining ac-tivities raised of degeneration damage.This based Shang divided out hard rock district dumping pulled Zhang damage type,and soft rock district surface mobile subsidence damage type,and shallow layer surface collapse damage type three species causes damage mode,last from rock body of long-term creep variable effect,and geological structure differences effect, and mining filling effect,and filling body low stiffness effect,and mining of mining empty effect,and repeat mining moving effect,and mine earthquake effect,aspects summary has deformation effect factors.Overall mining activity is direct external factors is the main fac-tor,is the controlling factor of geologic structure is internal and interaction are indispensa-ble.