摘要
通过船上测试的方法 ,对我国矿区沉积物的强度进行了测试和分析 ,结果表明沉积物的剪切强度随深度加大而变大 ,不同站位的沉积物由于类型不同其剪切强度随深度的变化也不一样 ,有的甚至还有较大的差别。同时发现深海沉积物的剪切强度在某一深度有一较为明显的剧增台阶 ,且它与沉积物的半液态层的深度相对应 ,半液态层的剪切强度一般都在 1kPa以下。因此 ,集矿机设计的原则应是既要保障足够的牵引力 ,又要考虑沉积物的触变特性 ,以便使集矿机不致对深海沉积物产生太大的扰动。
The shearing strengths of deposits of China′s mining region are determined and analysed using on board measurement methods. The results obtained show that the shearing strengths of deposits increase with increasing the depths. However, since deposits at different station sites are diffcrent in type, the variations in shearing strength with the depths are not the same, and even differ greatly. Also, it is found that there is a dramatically increased shearing strength bench of deep sea deposits at a certain depth, which corresponds to the depth at which semi fluid deposit layer is located, the semi fluid deposit layer has usually a shearing strength of below 1 kPa. Therefore, the principles observed in collector designing are to have both tractsve power enough and take the deposit thixotropy into account to avoid the intensely stirring up of the deep sea deposits.
出处
《矿冶工程》
CAS
CSCD
北大核心
2000年第3期21-24,共4页
Mining and Metallurgical Engineering
关键词
深海沉积物
强度特性
深海采矿
集矿机
锰结核
deep sea deposit
strength characteristics
depp sea mining
collector
