The development came after parts of a US-made auger machine, which drilled up to 46.8 metres through the debris, got stuck in the rubble on Friday, forcing officials to focus on an alternative option, such as vertical drilling and rathole mining technique.
Officials said that the horizontal drilling through the last 10-12 metres of debris of the collapsed portion of the tunnel will be done manually by a team of six rathole miners from Madhya Pradesh. They began the drilling from inside the pipes, 800- and 900-mm in diameter, pushed inside the tunnel to evacuate workers, on Monday.
この記事は Hindustan Times の November 28, 2023 版に掲載されています。
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この記事は Hindustan Times の November 28, 2023 版に掲載されています。
7 日間の Magzter GOLD 無料トライアルを開始して、何千もの厳選されたプレミアム ストーリー、9,000 以上の雑誌や新聞にアクセスしてください。
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