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井巷整体式支护是指竖井井壁和巷道碹体等支护型式。以往人们根据支护愈厚承受地压愈大的传统观念，在深井筒和松软岩层的井巷中，一味增大支护厚度。本文根据围岩与支护共同作用的理论指出：随着支护厚度增加，支护刚度就增大，从而地压也随之加大，导致支护内的应力并不显著降低。因而单纯地增加支护厚度往往是得不偿失的。文中给出了计算支护厚度的弹塑性理论公式，通过计算，编制了几种不同条件下的支护厚度与应力关系曲线，指出其合理支护厚度范围。又按最低支护成本的经济原则推导了最优支护厚度的公式，并用实例加以说明。
Roadway integral support refers to shaft shaft and roadway 碹 body support type. In the past, according to the traditional concept that the thicker the supportive ground, the larger the support thickness, the thicker the support shaft in the deep well tube and soft rock formation. According to the theory of surrounding rock and support interaction, the paper points out that as the support thickness increases, the support stiffness increases, so the ground pressure also increases, resulting in the stress within the support is not significantly reduced. Therefore, simply increasing the support thickness is often worth the candle. In this paper, the elastic-plastic theoretical formula for calculating the thickness of support is given. According to the calculation, the curves of support thickness and stress under several different conditions are compiled, and the reasonable support thickness range is pointed out. Then according to the economic principle of the lowest support cost, the optimal thickness of support formula is derived and illustrated by examples.