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为了揭示植物地上部防风抗蚀生物力学响应机制,筛选合适的防风树种,选取内蒙古中西部风水复合侵蚀区的准格尔露天煤矿排土场3龄半灌木杨柴地上部枝条为对象,进行室内瞬时极限拉伸试验。结果表明,0mm～2mm范围单枝极限抗拉力和枝径之间呈指数函数正相关关系,相关系数为0.75,而极限抗拉强度随枝径的增加呈减小的趋势。0mm～1.5mm代表枝径级单枝平均极限抗拉强度是Ⅰ级钢筋极限抗拉强度的18.32%。不同加载速度下抗拉试验结果显示,枝径相同时平均极限抗拉强度随着加载速度的增加而增加,降低而降低。随枝径的增加单枝极限应变量递增,达到一最大值后又呈下降趋势,其枝径在1mm时延伸率(极限应变)最大,达4.9%。
In order to reveal the biomechanical response mechanism of wind-resistant and anti-corrosion on the aerial part of the plant, we selected the appropriate windbreak tree species and selected the shoots on the top of the semi-shrubs of semi-shrubs of semi-shrubs of Zhunge’er open-pit coal mine in the central-western feng shui compound erosion area of Inner Mongolia for indoor Instantaneous ultimate tensile test. The results showed that there was a positive exponential function between ultimate tensile strength and branch diameter in the range of 0mm ~ 2mm, the correlation coefficient was 0.75, and the ultimate tensile strength decreased with the increase of branch diameter. 0mm ~ 1.5mm on behalf of the branch diameter average single branch ultimate tensile strength is Ⅰ grade reinforced ultimate tensile strength of 18.32%. The results of tensile test under different loading speeds show that the average ultimate tensile strength increases with the loading speed and decreases with the same branch diameter. With the increase of branch diameter, the ultimate strain of single branch increased gradually, then decreased to a maximum value. The maximum elongation (ultimate strain) reached 4.9% at the branch diameter of 1 mm.