TY - JOUR
T1 - In situ stress measurement by hydraulic fracturing at the Kamaishi mine
AU - Hayashi, Kazuo
AU - Ito, T.
N1 - Funding Information:
Acknowledgement- The authors wish to thank Mr. M. Ma-suoka, Mr. K. Kurosawa and Mr. A. Sato for their help in the field experiment and data analysis. The work presented here was supported by Ministry of Education, Science and Culture under Grant-in Aid for International Scientific Research Program 0344023.
PY - 1993/12
Y1 - 1993/12
N2 - Hydraulic fracturing stress measurement was performed by using a 30m-deep well drilled in the Kamaishi iron mine. Eight transverse cracks crossing the well obliquely were obtained. By re-plotting the shut-in curves, i.e., the pressure-time records after shut-in, into dT/dP vs. P plots (T: time, P: wellbore pressure), shut-in pressure was determined objectively. By using the shut-in pressure of the eight transverse cracks, three-dimensional stress field was evaluated based on the assumption that the shut-in pressure of a transverse crack gave a good estimate of the magnitude of the normal stress acting perpendicularly to the crack. Finally, the reliability of the evaluated stress field is discussed.
AB - Hydraulic fracturing stress measurement was performed by using a 30m-deep well drilled in the Kamaishi iron mine. Eight transverse cracks crossing the well obliquely were obtained. By re-plotting the shut-in curves, i.e., the pressure-time records after shut-in, into dT/dP vs. P plots (T: time, P: wellbore pressure), shut-in pressure was determined objectively. By using the shut-in pressure of the eight transverse cracks, three-dimensional stress field was evaluated based on the assumption that the shut-in pressure of a transverse crack gave a good estimate of the magnitude of the normal stress acting perpendicularly to the crack. Finally, the reliability of the evaluated stress field is discussed.
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U2 - 10.1016/0148-9062(93)90051-E
DO - 10.1016/0148-9062(93)90051-E
M3 - Article
AN - SCOPUS:0027800891
SN - 1365-1609
VL - 30
SP - 951
EP - 957
JO - International Journal of Rock Mechanics and Minings Sciences
JF - International Journal of Rock Mechanics and Minings Sciences
IS - 7
ER -