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Impulsive hydrofracture of polymethyl methacrylate

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The intensification of geotechnological processes by means of impulse hydrofracture in many areas of the mining industry requires engineering estimates of the parameters of the cracks formed (length, opening, number, orientation), especially if the technology employed requires deliberate fracturing of a solid mass with cracks with definite sizes and configurations. The scheme most widely used for impulsive hydrofracturing consists of the generation of an impulsive pressure in some part of a liquid-filled well. If this pressure is sufficiently high, the circumwell region of the rock mass is fractured with the formation of vertical cracks and radially configured ring-shaped cracks. Since the energy in the pulse and the mass of liquid in the fracture zone are limited, the cracks propagate over a finite distance and have a finite opening, determining the new hydrodynamic properties of the rock mass. In spite of the fact that there exist a substantial arsenal of special geophysical apparatus enabling such work, virtually no attention has been devoted to the mechanics of impulsive hydrofracturing. At the same time, the general characteristics of the fracturing of the rock mass in such loading regimes must be determined in order to predict the effectiveness of impulsive hydrofracturing and to select the optimal conditions. This goal was pursued in the experiments described below.

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Literature cited

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Translated from Zhurnal Prikladnoi Mekhaniki i Tekhnicheskoi Fiziki, No. 5, pp. 135–141, September–October, 1986.

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Vovk, A.A., Voitenko, Y.I. & Mikhalyuk, A.V. Impulsive hydrofracture of polymethyl methacrylate. J Appl Mech Tech Phys 27, 758–764 (1986).

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  • Optimal Condition
  • Rock Mass
  • Methacrylate
  • General Characteristic
  • Polymethyl Methacrylate