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Method for placing and firing explosive charge for geological investigations using relatively small diameter boreholes and firing device
Method for placing and firing explosive charge for geological investigations using relatively small diameter boreholes and firing device
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机译:使用相对较小直径的钻孔放置和发射用于地质研究的炸药的方法和发射装置
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摘要
A relatively narrow bore hole (14) is drilled and compressed air, steam or water introduced to scoop out at the bottom the larger chamber (22) required to hold the charge (42). In a suitably slim container (36) the charge, together with the primer (34), is lowered into the chamber where the charge is forced out of the container to fill it and surround the primer. The container can then be withdrawn for further use
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