The mathematical modeling and automatic control of pneumohydrodynamic treatment process on underground rock massifs

V.N. Pavlysh, L.A. Lazebnaya, Ismail Haser Dayeh, E.V. Perinskaya

The problem of research and control of technological process of pneumatic and hydrodynamic treatment on underground rock massive, saturated with carbo-hydrate minerals, is very important for mine industry. During the development process of formation of mineral deposits, in particular oil and gas arrays, there comes a time when lightly extracted part of the product ends and significant reserves remain sequestered within the array, resulting in reduced production volumes. In this case becomes important problem of increasing the intensity of extraction of useful product. One of the main ways of solving the problem is a purposeful change in the properties of the array by external influences, particularly pneumatic and hydraulic dynamical processing, while negative effect anisotropy array. Quality implementation exposure provided by automatic process control, which allows you to quickly react to put out of negative influence of anisotropy and ensure the stability of technological parameters. In this context, the theme of the work is actual. Purpose of the work is the studying of the pneumohydrodynamic treatment process on gas-saturated rock massif by mathematical modeling and elaboration of recommends for automatic control of impact technology schemes. When designing technology schemes of pumping of liquid agent must make a preliminary calculation of the basic parameters, such as injection pressure, flow rate (tempo, and others. To solve the problem, a linearized model of fluid flow in fractured porous media is applied. The equations of the same type are obtained to describe the process of movement of air, or gas-liquid mix. The simulation of the one-dimensional flow does not provide sufficient information for the theoretical understanding of the nature of the process. To solve the problem of mathematical modeling of hydraulic impact to an array with a two-dimensional (planar) formulation technique of longitudinal-transverse direction (Douglas) is used. The mathematical models form the basis of a software management system. The main feature of the process is the impact that the object (mountain range) "closed" from direct observation, and a mathematical model to simulate the process of impact, based on information about the "reaction" to the impact of the object. Comparing the data, the system fulfills team correction controlled parameters. On the basis of theoretical concepts, received practical advice on choosing the structure and technological parameters of the automated control system, developed an algorithm for selecting the optimal approximate vector control process pneumohydrodynamic impact.

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