雙河煤礦采動巷道頂板裂隙的分形研究
[Abstract]:The deformation of roadway roof is an important index to evaluate the stability of roadway roof. The fractal dimension of space between roadway roof fissures is an important parameter which comprehensively reflects the development and distribution characteristics of roof fissures, and tries to establish a mathematical relationship between them. The deformation of roof in mining roadway of Shuanghe Coal Mine is monitored by using multi-base point displacement meter. The development and distribution of cracks in roof are monitored by means of borehole television imager, and the fractal dimension of the spacing between cracks in roof is calculated. The results show that the fracture is the most developed within 0 m and 2 m of roof. Within this range, the fractal dimension of fracture line density and fracture spacing has the same change trend, and they have a linear relationship. The deformation of roof has the same trend as the fractal dimension of crack spacing. The fractal dimension of roof crack spacing increases and the deformation of surrounding rock increases. There is a linear relationship between them. The results show that the space fractal dimension of roof fissures is an index to comprehensively reflect the roof stability of roadway. It can be used as an index of roof stability of roadway to evaluate the roof stability of roadway and provide a reliable basis for supporting design.
【作者單位】: 中國礦業(yè)大學(xué)(北京)資源與安全工程學(xué)院;
【基金】:國家自然科學(xué)基金資助項目(No.51134018,No.51234005,No.51204187)~~
【分類號】:TD322
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