地表曲率变形对高速公路影响的研究

Study on influence of curvature deformation of ground surface in coal mine on free way

实地观测表明,在保安煤柱外侧开采时,高速公路会受到一定损害;以高速公路为对象的相似材料模拟实验表明,采动对覆岩的影响应按边界角确定;理论分析证明,高速公路曲线半径临界值应采用极限最小半径。由此深入分析了公路原始竖曲线曲率、公路曲率极限值和采动引起的附加曲率变形之间的关系。依据上述三个方面的研究,指出规程规定的曲率变形指标不适用于对高速公路的保护,并提出了相应的计算公式。

Through by the observation after mining outside the safety pillar, free way would be surely damaged; The similar material simulation experiment about free way showed that the effect of coal cutting on covering rock should be ascertained by border angle; Theoretical analysis proved that the curve radius critical value of free way should be adopted by the limit of minimum radius .Therefore, the relations, the primitive vertical curve of free way, the curve extreme of free way and additional curvature deformation by coal cutting, were analyzed deeply. According to the research of above-mentioned three respects flee paper, points out that the index of curvature deformation by our code can be applied not to the protection of free way, and puts forward the corresponding curvature deformation formulas.