开采

Calder J H%Gibling M R The Euramerican Coal Province: controls on Late Palazoic peat accumulation 10.1016/0031-0182(94)90002-7 Palaeogeography,Palaeoclimatology,Palaeoecology , 1994,null

彭苏萍%张建华乌达矿区含煤地层沉积环境及其对矿山开采的影响北京：煤炭工业出版社， 1996，null

The results indicates that the years average equilibrium difference between recharge and discharge is -21.76×108m3/a, resulted from cosmically and high strength exploitation and resulting in water table's coming down persistingly.

研究表明，大规模高强度开采条件下，华北平原浅层地下水系统多年平均补排均衡差为-21.76×108m3/a，导致浅层地下水水位持续下降。

The paper discusses briefly the differences between testing of CBM well and the conventional oil and gas well in aspects of well testing objects,petrographical structure,level of extraction,well test model and analysis methods of well testing results.

本文从煤层气试井的对象、煤岩结构、开采阶段、试井模型、试井分析方法等方面简要讨论了煤层气试井和常规油气井试井的差别。

Petroleum is a nation's strategic material. With China's entry to WTO, our petrolic enterprises are facing fierce competitions at the international markets. The high cost of exploiting crude oil has severely hampered the competitiveness of our petrolic enterprises.

石油是国家重要的战略物资，加入WTO之后，我国的油田企业面临着激烈的国际竞争，原油开采成本的居高不下，严重地影响了我国油田企业的国际竞争力。

Democratic congressional leaders point out that, according to petrolic petroleum experts, it would take a decade or more before new oil aspiration yell the exploration yielded significant supplies of crude, and that the actual impact on gasoline prices would likely be marginal.

民主党国会领导人指出，根据石油专家的判断，十年甚至更长时间内都不应开采新勘探到的重要原油资源，而现行的油价冲击很可能已经接近尾声。

Phosphatic fertilizer production will depend on the low-grade phosphate ore s more and more .

随着富矿资源开采的日渐枯竭，磷肥生产将不得不依赖杂质较多的贫矿资源，因此低品位磷矿的开发将具有重要的现实意义。

It has important effects for the stability of water conservancy building,the using of groundwater resource,the pollution controlling,the exploitation of rock oil and natural gas.And the needs of projects for those fields are increasing home and abroad.So the research of seepage flow becomes focuse.In this article,a saturated and unsaturated seepage model has been established which includes double variables:piezometric tube waterhead and saturation.

渗流现象是多孔介质中普遍客观存在的运动规律，其对水工建筑物稳定性、地下水资源利用、污染控制、石油天然气开采等工程问题均具有重要的影响，随着国内外在上述领域中工程需求的增加，渗流研究日益成为热点问题。

The mining of pining nine have led to the lack of genuine magazine.

对松类藤的开采导致了真弹药的缺乏。

The mining of pining nine has led to the lack of genuine magazine.

对松类藤的开采导致了真弹药的缺乏。考研英语

The trial results show that with the disposal of induced caving roof by presplitting blasting and induced caving roof blasting, about 17.8 m in thickness of rock cushion is successfully formed in the inferior abandoned stope, which can bring down the harm of dashing blast of an explosion caused by roof collapse; apparent run-through flaws arise between presplitting blasting holes, and controllable caving is formed in the roof, abrupt collapse of large area roof is prevented, the productional safe surroundings of underground mining is improved; eventually, the resources' reclamation rate is improved from about 70% to 84.6%, and the dilution rate is abated from 25%40% to below 15%, so efficiently withdrawing is actualized.

试验结果表明：采用预裂爆破与诱导崩顶爆破的方法，通过对顶板的诱导崩落处理，成功地在下方采空区形成了厚度为17.8 m左右的岩石缓冲垫层，有效地降低顶板冒落带来的冲击气浪危害；在预裂孔间产生明显的贯通裂隙，从而在顶板上形成诱导可控崩落，防止顶板大面积的突然垮落，改善地下开采安全生产环境；最终资源的回收率由70%左右提高到84.6%，贫化率由25%~40%降低到15%以下，实现了资源的高效回收。

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。