地下人工き裂の既破断面による安定保持に関する破壊力学的研究

概要

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The behavior of a geothermal reservoir connecting with a horizontal natural fracture in the earth's crust is analyzed on the basis of liner elastic fracture mechanics. Noting crack reinitiation from preexisting micro craks of a natural fracture, the influence of various factors on the behavior of the reservoir is investigated, and then the stability of reservoir is discussed. It is revealed that the main factor governing the mechanical behavior of the reservoir is the discontinuity of tectonic stress and fracture toughness across the natural fracture. It is also shown that the reservoir is always stable and can be relatively larger than a vertical reservoir in a continuous rock mass, when the horizontal compressive stress in the region over the fracture i s larger than that in the region beneath the fracture.
一般社団法人日本機械学会の論文
1986-01-25