煤二次開采 的英文怎麼說
中文拼音 [méièrcìkāicǎi]
煤二次開采
英文
secondary coal recovery-
Quadratic function analysis of greatest subsidence angle during mining pitching or steerly pitching coal seam
大傾角煤層開采最大下沉角的二次插值分析Because the upper rocks are influenced after the mining lower coal, they glide along the primary bursting surface, and the upper rock layers can form surface - contact fabric by its shear and bulge function
作者認為,下煤層開采後上覆頂板巖層受到二次擾動,其破壞移動主要是沿原有破裂面滑移,由於剪脹的作用,上覆巖層能夠形成面接觸的覆巖基本結構特徵。
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