High gas compressibility, facies lamination, and presence of sub-lateral microfractures make shale gas reservoir rocks very sensitive to changing outer pressure and lead to severe damage of the whole core when it is recovered to surface. The approaches currently used for safe core retrieval do not adequately account for gas shale features, therefore, they are not capable of reliable modeling of this process. The article presents an extension of the recently developed optimization of the core tripping algorithm to shale gas formations featuring significant improvements. One, we show the lead role of strong inter-relation between gas flow and rock deformation process in the optimization of the core lifting process and propose a new decompression model of gas saturated shale rocks. Two, we introduce the dynamic permeability concept for shale gases, which considers individual behavior of the pores in organic matter, inorganic matrix, and microcracks. Three, we propose ways for calculation of the stress-strain state in cylindrical domain by applying numerical and semi-analytical solutions. Four, we introduce an interface failure mechanism for lamination rocks. Finally, we discuss the influence of different void types on decompression and dependence of the optimal schedule on microfracturing properties. Eventually, the article outlines several significant conclusions. In the fractured region, the degassing slows down due to crack closure near to the outer core boundary. The interface failure is an overlooked mechanism of rock failure. Frequent and long stoppages are required for preventing interface crack extension.