摘要
根据五年来的地表观测结果，认为在推覆体下进行的机械化综放采煤造成的地表损害主要取决于开采空间及推覆体岩体的性质、赋存条件及其厚度。当推覆体厚度大于５０ｍ时，煤系破坏的连续性使推覆体下方间断形成“离层”，为应力集中、水及瓦斯渗漏提供了空间。
According to the surface surveying results obtained in recent five years,it is considered that the surface damage which is caused by using mechanized sublevel caving method under thick cappe depends largely on the volume of mining excavation,the mechanical properties of the capping rock,its occurrence and thickness.At the place where the cappe thickness is over 50 meters,stratum parting occurs as a result of the continuous failure of coal stratum,leading concentration of stress,seepage of water and gas to take place.
出处
《有色金属》
CSCD
1997年第3期5-9,共5页
Nonferrous Metals
关键词
机械化综放采煤
开采沉陷
推覆体破坏
地层分离
mechanized sublevel caving
mining subsidence
cappefailure
stratum parting
