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State-of-the-Art Technique to Conduct in situ Stress Measurements in Deep Proposed Coal-Mining Blocks of Singareni Collieries, India
Singareni Collieries Company Ltd is proposing some new mining blocks in the Godavari coalfield with status document with roof hazard zonation maps vis-à-vis stress field, for safe and economical mine design. Hence, National Institute of Rock Mechanics, conducted stress measurements by hydraulic fracturing method in the newly proposed mining blocks at Mandamarri and Bellampalli areas of Singareni collieries at deeper levels from the surface up to 600 m depth to find out the existing stress regime to prepare the roof hazard maps for safe and economic mining. This communication deals with the technique adopted for hydraulic fracturing, method of estimating stresses, analysis of the results for magnitude and direction of in situ stresses prevailing at deeper horizons. These studies could be helpful in other coal mining areas.
Keywords
Coal Mining, Hydraulic Tests, Pre-Existing Fracture, Rock Masses, Stress.
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- Fairhurst, C., In situ stress determination an appraisal of its significance in rock mechanics. In Proceedings of the International Symposium on Rock Stress and Rock Stress Measurements, Stockholm, Centek Publ., Lulea, Sweden, 1986, pp. 3–17.
- Haimson, B., A simple method for estimating in situ stresses at great depths. In Field Testing and Instrumentation of Rock (ed. Clark, G.), West Conshohocken, ASTM International, PA, 1974, pp. 156–182; https://doi.org/10.1520/STP32150S
- Rummel, F., Stresses and Tectonics of the Upper Continental Crust – A Review, International Society for Rock Mechanics and Rock Engineering, 1986.
- Amedi, B. and Stephanson, O., Rock Stress and its Measurement, Chapman & Hall Publishers, London, UK, 1997.
- Bigby, D. N., Cassie, J. W. and Ledger, A. R., Absolute stress and stress change measurements in British coal measures. In Proceedings of ISRM Conference on Rock Characterization. Proceedings of ISRM Symposium: Eurock’92, Chester, 14–17 September 1992, pp. 390–395.
- Cornet, F. H. and Valette, B., In situ stress determination from hydraulic injection test data. J. Geophys. Res., 1984, 89(13), 11527–11537.
- Cornet, F. H., Stress determination from hydraulic tests on preexisting fractures – the H.T.P.F. method. In Proceedings of the International Symposium Rock Stress and Rock Stress Measurements, CENTEK Publ, Lulea, Sweden, 1986, pp. 301–311.
- User’s Manual, Mesy’s Hydrofrac pressure and flow rate data analysis software, Mesy GMBH, Germany, 1993.
- User’s Manual, Gensim and Plane Software, Mesy GMBH, Germany, 1993.
- Internal Reports and Communications of NIRM.
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