开采量

With economic development, the rock material is widely applied in the water conservation、 resources mining、 the civil construction 、 the railway and so on, a lot of problem about rocks urgently is demanded to solve, so there are very important theory and realistic meanings to thoroughly research its nature、 concerning and destroying mechanism,Due to natural function, massive joint and crack with rock, though the scale of these is small, it changes mechanics nature of rock greatly and reduces deforms mould and intensity parameter, and makes it presenting aeolotropy .

随着我国经济建设的发展，岩石材料被广泛应用于水利、资源开采、土木建筑、铁路等领域，与此同时出现许多岩石方面迫切需要解决的问题，所以对其性质、本构关系、破坏机理的深入研究有重要的理论意义和现实意义。由于天然作用，岩石内部存在大量的节理和裂隙，虽然这些裂隙的规模不大，但裂隙的存在大大地改变了岩体的力学性质，使其变形模量及强度参数降低，且使岩体的力学性质呈各向异性。

But when we mine commensuration groundwater, the falling velocity water level and range of the deep hydrous stratum are bigger than the shallow hydrous stratum. And the quantity of subsidence is not obvious different. 2. Analyzing the relation between the stratum of groundwater and land subsidence, with the depth of aquifer bed increased, the proportion that the released water because of compressibility of strata possessed become bigger, and it cause land subsidence more serious. 3. The physical and mechanical properties and the consolidation state of stratum do not become better with the depth increased.

依据： ①一般情况下，随深度增加，地层的压缩性会渐下；但是开采同量的地下水，其水位下降的速率及幅度深部含水组比浅部含水组要大的多，两者引起的沉降量不会有明显的差别；②从地下水开采资源组成与地面沉降关系分析，含水层深度越深，其中的压密释水量所占的比例也越大，造成的地面沉降也越严重；③地层的物理力学性质及固结状态，随深度的增加，也不完全是越来越好。

At the same time, the technology of coal mining also developer quickly, compare with before mine exploitation is much more centralize, production and new building mine are increasing accretion. Because of this the character of mine size, exploitation deep, assistant exaltation and gas effuse are gradually increasing.

同时，采煤技术也迅速发展，矿井开采的集中化程度日益提高，生产和新建矿井的井型日益增大，逐渐形成井田尺寸小、开采深度大、辅助提升任务大和瓦斯涌出量增加等特点。

Third,? Proven exploitable reserves of mineral deposits, only 6,000,000 tons of Glauber's salt, 100,000,000 tons of limestone annual emission of 70,000 tons of quality natural mineral water. Fourth, very difficult to finance.

其三，？已探明可开采的矿藏只有藏量600万吨的芒硝、1亿吨的石灰石、年涌出量7万吨的优质天然矿泉水。

The theory of space conversation for strata control in backfilling mining was successfully practiced in a coal mine.

工程实践表明，充填开采控制地表沉陷的空隙量守恒理论在煤矿青体充填开采实践中得到了成功应用。

The theory of space conversation for strata control in backfilling mining was successfully practiced in a coal mine.

工程实践表明，充填开采控制地表沉陷的空隙量守恒理论在煤矿膏体充填开采实践中得到了成功应用。

The results reveal that the annual volume of surface water resources out of the debouchure of the Shiyang River has been decreased by 15.91% compared with that during the period from the 1950s to the 1990s, the volumes of groundwater recharge, spring water resources and inflow to the lower reaches have been decreased by 42.92%, 84.3% and 75% respectively, but the volume of pumped groundwater has been increased by 10 times.

结果表明：自20世纪50~90年代，石羊河流域出山地表水资源减少了15.91%，地下水补给资源减少了42.92%，地下水开采量增大了近10倍，泉水资源衰减了84.3%，进入下游的水资源减少了75%。

A clear explanation of sustainable yield is presented and approaches to achieve groundwater sustainability are summarised.

文中对可持续开采量的定义进行了详细的解释，对实现地下水可持续开发的方法进行了总结。

The nation simply cannot drill its way to lower prices at the pump,' the Democratic staff of the House Committee on Natural Resources said in a report last week.

众议院自然资源委员会中的民主党议员上周在一份报告中说，美国不能靠增加国内开采量来降低油价。

Metal mineral deposits are mainly gold, silver, copper, iron, lead, zinc, manganese, tungsten, chromium and so on, which is located in Tartu County Ditch Subei tungsten ore reserves in Asia first, large Gonchigdorj chrome ore reserves ranking third , the volume of gold mining were the first home in Gansu Province.

金属矿藏主要有金、银、铜、铁、铅、锌、锰、钨、铬等，其中位于肃北县塔尔沟的钨矿储量居亚洲第一，大道尔吉铬矿储量居全国第三，黄金开采量居甘肃省首们。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。