梅山铁矿地压活动特征的调查与成因分析

Investigation and Genetic Analysis of Geopressure Characters in Meishan Iron Mine

本文探讨了梅山铁矿地压活动的特征,形成机理和类型划分,阐述了治理与控制地压活动的对策。

There exist five major patterns of the geopressure activities in Meishan Iron Mine covering heaving and expanding in floor, expanding in lateral wall, collapsing and caving in roof of tunnel. creaking and stripping of supports in lateral wall and vault, shrinking and deforming of tunnel and distorting of water channel as well as weathering of rocks as clay and powder. The geopressure activity can be divided into expanding , loose and deformation types in Meishan Mine. To control the geopressure and decrease the damage limit, the engineering geological conditions has to be investigated and assessed to combine with different support methods according to the geopressure in different region. Also, a suitable tunnel distribution, driving method and support times as well as support quality should be considered carefully during operation.