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支架的变形特性对支架荷载的形成过程有很大影响,这在复杂地质条件下表现更为明显,不仅荷载数值不断增长,还可看出荷载在支架周边的分布是不均匀的。为了保证巷道的稳定性,可采用固结性材料进行支护壁后注浆,以形成由金属支架和注浆壳体组成的双层支架。这样,使作用在支架上的荷载分布比较均匀,整个支架的承载力得到提高。这时,为了抵抗很高的荷载,在高地压显现地段的支架周边形成高刚度的注浆壳体。下面论述的,是作者提出的比较经济的控制支架荷载的方法,这种方法是通过改变注浆石的变形特性,特别是改变其变形模量E_T,和波松系数μ_T来实现的。
The deformation characteristics of the support have a great influence on the formation process of the support, which is more obvious under complicated geological conditions. Not only the load value is increasing, but also the distribution of the load around the support is uneven. In order to ensure the stability of the roadway, solidified materials can be used to support the wall after the grouting, to form a metal bracket and grouting shell composed of double-shelves. In this way, the load acting on the bracket is distributed more evenly, and the bearing capacity of the whole bracket is improved. At this time, in order to withstand high loads, a high-rigidity grouting shell is formed around the bracket of the area where the high pressure is developed. Discussed below are the authors proposed a more economical method of controlling the load of the scaffold by changing the deformation characteristics of the grouting stone, in particular by changing its modulus of elasticity E_T and the Poisson’s ratio μ_T.