查询词典 data mining

In order to overcome some difficulties in mechanized kaolin mining, such as the weak roof, hard ore body, high toughness, it is necessary to apply long hole standing shot technology before the mining activity so as to improve the mechanical cutting efficiency and meet the demand of blocks degree.

为了解决煤系高岭土矿机械化开采存在顶板软弱，矿体相对煤炭质地硬，韧性大，矿石块度要求适中等难题，有必要在开采前采用预先对矿体进行充分合理的松动爆破，以提高机械切割效率及满足矿石块度适中的要求。

The practice indicates that the stope mining indexes obtained by this method are reliable and can be used in actual production management and mining quality appraisal.

研究结果表明：采用该方法计算获得的采场回采指标可靠，可用于矿山实际生产管理和回采质量评估。

The mining method of wide strip skip-mining is put forward.

提出了宽条带跳采的采煤方法。

But if the strip mining companies will pay more,then perhaps the best disposition of the land is to sell it to the strip mining companies.

但是如果采矿公司愿意支付更多，也许对这块土地最好的处理是把它卖给采矿公司。

In an attempt to contain some of the disastrous consequences of strip mining. Congresspassed the Surface Mining Control and Reclamation Act of 1977.

在控制那些由露天剥采造成的灾难性后果的尝试中，议会于1977年通过了表层土地采矿控制与开垦的法案。

Have disastrous environmental effects, especially strip or surface mining. Roughlyby strip mining.

有关煤的使用的最大问题之一在于煤的开采可能会造成灾难性的环境破坏，特别是掠夺式的开采或表面开采。

The resultindicated that, this method to decide strip mining parameter by integrated analysis is reliablehighly, it is one economical feasible method and has a good application value, it also hasimportant reference value regarding the mining area that has similar geological and the miningcondition.

结果表明，这种综合分析确定条带开采参数的方法，具有较高的可靠性，是一种经济可行的方法，具有较好的应用价值，对于类似地质和开采条件的矿区具有重要参考价值。

With the mining depth of increased, the sublevel height must be increased so as to decrease mining cost.

这样的参数可以说从60年代无底柱分段崩落法引进到我国，一直成为无底柱分段崩落法的结构的主导。

ABSTRACT Sublevel caving method is a high efficiency mining method for underground mine, it has many advantages, such as a simple mine stope, good work condition, high mechanization and low mining cost. Up to now, this method has been used in more than 85 percent of all underground iron mine.

无底柱分段崩落法是一种高效率的采矿方法，具有采场结构简单，作业条件好，机械化程度高，回采强度大，采矿成本低等优点，迄今应用该采矿方法采出的矿石量约占我国地下铁矿采出矿石总量的85％。

And it will be prospected in controlling coal-mining-induced subsidence in other big coal mining areas.

该成果对其它大型矿区的采煤沉陷控制也将具有一定的参考价值和推广应用前景。

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。