| A lot of natural gas and oil was contained in fractured reservoirs, the way of oil and gas exploration was hydraulic fracturing technology, fracturing rock layers with the hydraulic, thus the gas or oil was released. But fractured reservoirs rock contains a number of inclusions which consist of many mineral components, making the rock material was a composite material, and, shale is a soft rock, therefore, regularity research on the influence of the rock mechanical properties with inclusions that had very important theoretical significance and engineering application value.The finite element analysis software ABAQUS was used in this paper, based on two elastic-plastic model which are Mohr-Coulomb model and Drucker-Prager model, considering the inclusions’distribution that were uniform and random distribution, rock specimens free of inclusions and rock specimens with different content inclusions which had solid and hollow types, was static numerical simulation analysed. Related effects laws were studied in the thesis by various factors analysis of inclusions and soft rock:firstly, the influence of different amounts of inclusions on the mechanical properties of solid rock and hollow rock; secondly, the influence of changing the internal friction angle on the mechanical properties of solid rock and hollow rock containing inclusions; addition, the influence of changing the cohesion of the mechanical properties of the solid rock and hollow rock containing inclusions.The relevant laws of the soft rock mechanics characteristics with different amounts of inclusions and the soft rock material parameters were obtained through a lot of numerical simulation, and, the validity and rationality that the three-dimensional model could be simplified as a two-dimensional model to numerical simulation analyze was verified by comparing the analysis results of two-dimensional model with three-dimensional model. |
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