开采

The Tonglushan copper-iron deposit,being one of contact metasomatic skarn polymeatal deposit,is at medium risk for use up of its resource after 30 years mining.

铜绿山铜铁矿床是长江中下游铜铁多金属成矿带典型的接触交代矽卡岩型矿床之一，但经三十余年的开采，资源己是中度危机，寻找接替资源，迫在眉睫。

As one of major monitoring techniques for forecasting the disasters in mine, Microseismic signal contains some special characteristics, such as rich composition of the spectrum and wide frequency band.

在煤矿开采过程中，煤层底板突水、淹井事故时有发生，严重影响煤矿的正常生产，但目前其预测的可靠程度与生产实际还有较大的差距。

Yet economically minable deposits are few, and jurisdictions that permit their extraction even fewer.

然而可以经济开采的矿床很少，判定能采掘出矿产的就更少了。

Economically minable limestone does not occur so frequently .

经济上值得开采的石灰石并不这样多。

Based on the sensitive analysis, the main influence factors in optimization design of strip size and control of surface subsiednce with strip minning are proposed.

在敏感性分析的基础上，指出了条带开采优化设计和地表位移控制的主控因素。

The paper selected 10 sample faces which have different features and havebeen finished minning, then evaluate the risk in the faces with the evaluateprogram write with Matlab to test the model.

论文选取10个具有不同特点的已完成开采的采煤工作面，采用Matlab编写了评价程序进行了评价试算。

By using methods of geology,drill,logging and earthquake,the forming mechanism,development situation of the small fault (less than 30m) of the third mine of Dongrong,Jixian minning area,Heilongjiang Province are studied.

对黑龙江省双鸭山集贤矿区东荣三井首采区内小于30m断距的小断层，采用了地质、钻探、测井、地震等方法，对它的形成机理、发育情况及其分布规律进行了系统的研究；划分了3个构造复杂区、4个构造简单区，对指导煤炭开采具有一定实际意义。

Statistics show that Xuguang mirabilite resources are mainly engaged in natural product extraction, processing and manufacturing business.

资料显示，旭光资源主要从事天然芒硝产品的开采、加工及制造业务。

Nam Fung, chairman of Chemical million new building south of Jiangsu Chemical recently mirabilite resources and of the layout of the mine, drilling and so a detailed understanding of the company to take the layout of the scientific, rational exploitation of the mine operation cycle and improve resource expressed appreciation for the use of the practice.

南风化工新任董事长万建军最近对江苏南风化工的芒硝资源状况和矿井的布局、钻探等情况进行了详细的了解，对公司采取的科学布局、合理开采、提高矿井运行周期和提高资源利用的做法表示赞赏。

Highly mineralized groundwater can be explored from strongly salinized land thus producing mirabilite and table salt.

重度盐碱地可开采高矿化地下水，生产芒硝和食盐。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。