【摘要】 本文介绍的密云泄空隧洞进水口水下岩塞爆破泄流的观测研究项目有:出口特征流态;泄量变化过程;泄碴过程;洞壁磨损;消力池和尾渠流态等。由于岩塞起爆后,水流中单位体积含碴量尚未超过一定限度,仍属水流挟碴的高速水流运动特性,所以原型与模型数据比较一致。文中还对岩塞起爆后,爆炸余能在进水口转化为位能所引起的附加作用水头进行了探讨。实际观测结果表明,此次水下岩塞爆破设计是合理的,爆破是成功的。更多还原

【Abstract】 The investigation includes the observation of the flow regime at the tun-re! outlet as well as in the stilling basin and tailrace, the variation of discharge, the transportation of rock fragments in water flow, the abra- sion of tunnel wall due to rock fragments-laden flow, etc . .The comparison of the results between model study and prototype observation shows that the two have reasonable conformity,because the fragments contents per unit volume of water flow in both cases is limited to the same amount and the flow pattern is like that of a debris laden high-velocity flow. The additional effective head due to the potential energy converted from the residual energy at the intake after blasting is also discussed.The prototype observation indicates that the design of rock plug blast underwater was rational and that the blast was successful.更多还原