apopore

In this paper, the head loss coefficient of lock culvert manifold is discussed.

对已有的船闸出水孔段廊道的模型试验及原型观测资料进行了对比分析后 ,指出该段廊道的阻力系数 ,除沿程摩阻损失可按糙率及雷诺数进行校正外 ,其余均属局部阻力性质 。

Based on the geological and mining conditions and occurrence characteristics of loose aquifer of Xinglongzhuang Colliery,water bursting cause of 4303 full-mechanized caving mining face under loose aquifer was analyzed,the prevention measures of the 3rd aquifer and reasonable dimension of coal pillar for sand proof were discussed in this paper.

根据兴隆庄煤矿地质采矿条件,结合松散含水层赋存特征,分析了四采区4303综放工作面第四系松散含水层出水的原因,探讨了防治三含水的技术途径和留设防砂煤柱的合理尺寸。

The water bursting of No.

新安煤矿井下2#水文孔硐室出水原因系水文孔漏水所致。

There are some excretion, remnants of nutrient, remnants of medicament, living food and some pathogen in the effluent of Mari-culture workshop.

鱼、虾、贝等人工育苗场的出水中含有大量的排泄物、残饵、残余药物及病原微生物,但目前国内几乎所有的鱼苗场的出水均采用直接排海的办法,对近海生态环境的破坏日益严重,妨碍水产养殖的可持续发展。