Along with the exploitation of the underground space approaches to the deep constantly

some phenomenon cannot be fully explained by mechanics of continuous media. The Protojiakonov’s Theory as a breakthrough

the shortage of the pressure calculation is found out from quantitative angle by analyzing example. The result from strength theory is in tally with the actual physico-mechanical truth. The shortage of strength theory is shown that in the continuity theory-frame also; mainly because the invisible district wasn’t considered. The new methods must be adopted in order to describe the rock-pressure accurately.