Conclusions
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1.
Characteristic regions of triaxial, uniaxial, and compression-tension are formed as a function of the planform dimensions of the interchamber pillar and its height.
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2.
Values of the limiting loads on the pillar depend on its dimensions and shape, the dimensions of the endogenic cracks, and their orientation, and are evaluated quantitatively by the above-cited equations.
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3.
The possibility exists that the load sustained by the pillar can be controlled by creating artificial cracks-slits of a certain length and orientation-in the latter. The parameters of the controlling cracks are evaluated from equations cited in the paper.
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Additional information
Polytechnic Institute, Karaganda. Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 2, pp. 9–14, March–April, 1989.
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Aitaliev, S.M., Khalmanov, K.Z. Crack mechanics in controlling pillar loading. Soviet Mining Science 25, 106–111 (1989). https://doi.org/10.1007/BF02528337
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DOI: https://doi.org/10.1007/BF02528337