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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


Affiliations
1 Geotechnical Engineering Department, National Institute of Rock Mechanics, Bengaluru 560 070, 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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Abstract Views: 345

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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

Abstract Views: 345  |  PDF Views: 130

Authors

D. S. Subrahmanyam
Geotechnical Engineering Department, National Institute of Rock Mechanics, Bengaluru 560 070, India
G. Shyam
Geotechnical Engineering Department, National Institute of Rock Mechanics, Bengaluru 560 070, India
K. Vamshidhar
Geotechnical Engineering Department, National Institute of Rock Mechanics, Bengaluru 560 070, India
S. Vikram
Geotechnical Engineering Department, National Institute of Rock Mechanics, Bengaluru 560 070, India

Abstract


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.

References





DOI: https://doi.org/10.18520/cs%2Fv119%2Fi6%2F1027-1030