In-situ rock strength determination for blasting purposes
- Regional Engineering Coll., Kurukshetra (India). Civil Engineering Dept.
Compressive strength of rocks is often required by mining engineers and quarrying authorities for blasting operations. Uniaxial compressive strength of rocks can be predicted with reasonable accuracy with the help of point load strength tests which can be easily conducted at site by the field staff, simultaneously as the cores are recovered from drilling operations. A number of diametral point load tests and uniaxial compressive strength tests have been conducted on the specimens of different rock types under air dried, and saturated condition as well to study the effect of ground water saturation on strength. It has been observed that due to saturation uniaxial compressive strength and point load strength get reduced to a maximum of 32 and 29 percent respectively. It has also been observed that uniaxial strength is sixteen times the point load strength in air dried as well as saturated condition. However, this factor used for calculating uniaxial compressive strength may be reduced to a lower value for the safety of miners in field blasting operations.
- OSTI ID:
- 398338
- Report Number(s):
- CONF-9401127-; TRN: IM9649%%546
- Resource Relation:
- Conference: 10. annual symposium on explosives and blasting research, Austin, TX (United States), 30 Jan 1994 - 30 Jan 1996; Other Information: PBD: 1994; Related Information: Is Part Of Proceedings of the tenth annual symposium on explosives and blasting research; PB: 313 p.
- Country of Publication:
- United States
- Language:
- English
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