Grouting of large karstic caverns in dobrogea Coalfield,Bulgaria |
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Authors: | E Ja Kipko D Sc Min Eng |
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Affiliation: | 1. Specialized Association Spetstamponazhgeologia, 7a Petrovski St., Antratsit, Voroshilovgrad Region, USSR
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Abstract: | The paper describes the results of an experimental grouting programme carried out by the Spetstamponazhgeologia association at the Dobrogea coalfield in Bulgaria. The anticipated water inflow into a shaft at this deposit totals 8 m3/s at a pressure of 12 MPa, from a cavity size equal or exceeding 3 metres. Grouting operations made it possible to cut down water inflow by a factor of more than one thousand. The success of this investigation has enabled the author to design an exprrimental shaft sinking project through the valange formation at Dobrogea mine. |
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