水库输水洞水下岩塞爆破集碴坑设计及试验研究

Design and test study of slag collecting pit of underwater rock-plug blasting for water conveyance tunnel of Fengman reservoir

通过取水口水下岩塞爆破的集碴坑设计及模型试验研究,给出集碴形式的可行性、合理性。由试验现象和集碴效果分析得出:集碴坑进口纵向宽度的缩窄虽然更有利于岩碴在集碴坑内的堆积,但岩塞爆破中岩碴破裂程度具有不确定性,试验推荐集碴坑进口纵向宽度为11.00m的布置方案。

The paper introduces the feasibility and rationality of the slag collecting form through the slag collecting pit design and model test study of underwater rock-plug blasting for water intake. The results from the analysis of the test phenomenon and slag collecting effect show that, the vertical width constriction of slag collecting pit inlet is better for the rock accumulation in slag collecting pit, but the broken extent of the rock slag has the uncertainty in the rock-plug blasting. Then the test recommends the layout with the 11 m vertical width of slag collecting pit inlet.