Negative excavation blasting structure and method for nuclear island corridor foundation pit

The invention discloses a negative excavation blasting structure and method for a nuclear island corridor foundation pit. A blasting area of a corridor foundation pit is defined by an inner ring line and an outer ring line; the blasting area of the corridor foundation pit is divided into a plurality...

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Hauptverfasser:	PENG XIAOSONG, GUO YONGKUAN, LI MENG, HUA QIANG, LU YUSONG, YI YILIN, LIU JIANMU, LI WENKAI, ZHOU YI, LUO PAN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	AMMUNITION BLASTING HEATING LIGHTING MECHANICAL ENGINEERING WEAPONS
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creator	PENG XIAOSONG GUO YONGKUAN LI MENG HUA QIANG LU YUSONG YI YILIN LIU JIANMU LI WENKAI ZHOU YI LUO PAN
description	The invention discloses a negative excavation blasting structure and method for a nuclear island corridor foundation pit. A blasting area of a corridor foundation pit is defined by an inner ring line and an outer ring line; the blasting area of the corridor foundation pit is divided into a plurality of blasting sections; a plurality of first pre-splitting holes are formed in the inner ring line at intervals, and a plurality of second pre-splitting holes are formed in the outer ring line at intervals; at least one row of first slotting holes are formed between every two adjacent blasting intervals; a plurality of first main blasting holes are formed in each blasting section at intervals; and the first pre-splitting holes, the second pre-splitting holes, the first slotting holes, second slotting holes and the first main blasting holes are each provided with a charging section and a filling section. Ideal inner and outer circumferential cracks of the corridor can be formed at a preset position of a rock foundati
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A blasting area of a corridor foundation pit is defined by an inner ring line and an outer ring line; the blasting area of the corridor foundation pit is divided into a plurality of blasting sections; a plurality of first pre-splitting holes are formed in the inner ring line at intervals, and a plurality of second pre-splitting holes are formed in the outer ring line at intervals; at least one row of first slotting holes are formed between every two adjacent blasting intervals; a plurality of first main blasting holes are formed in each blasting section at intervals; and the first pre-splitting holes, the second pre-splitting holes, the first slotting holes, second slotting holes and the first main blasting holes are each provided with a charging section and a filling section. 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subjects	AMMUNITION BLASTING HEATING LIGHTING MECHANICAL ENGINEERING WEAPONS
title	Negative excavation blasting structure and method for nuclear island corridor foundation pit
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