急倾斜煤层开采地表非连续变形计算方法研究

Study of calculation method for discontinuous surface deformation induced by steeply-inclined seam mining

提出了急倾斜煤层开采地表非连续变形的度量方法 ;采用有限元法分析了层间弱面条件下地表非连续变形的影响因素 ;创建了急倾斜煤层开采地表非连续变形关于采动程度、弱面位置、弱面宽度、弱面介质特性的计算方法 .实例分析表明 ,计算方法应用简便 ,效果良好 ,为地表非连续变形的计算提供了新途经 .

A measuring method on ground discontinuous deformation due to steeply inclined coal seam mining is put forward. By applying finite element method, analysis of main influenced factors to surface discontinuous deformation on condition of interlayer weak planes are made. A series of calculation formula and method on discontinuous deformation have been derived under considering the aspects of underground mining influence, position and width of weak plane, and mechanical property of weak plane medium. Analysis of some examples verifies that the set up calculation method is easy to apply and good results have been obtained. The method provides a new way for calculating ground non continuous deformation.