查询词典 opencast mining

At last,presents a modem long - distance education model which establishes on the basis of Web mining and data mining .

在Web挖掘和数据挖掘研究的基础上，提出了一个智能化、个性化的现代远程教育系统结构模型。

And designed and manufactured according to customer needs special equipment, factory production, sand mining machinery, gold mining machinery can be completed at the same time, selection, extraction, separation, cleaning and other processes to produce a one-time qualified river sand, iron sand, alluvial gold, stones, etc.

并根据客户需求设计生产异型设备，本厂生产的矿沙机械、淘金机械能同时完成挖掘、筛选、提取、分离、清洗等多个工序，一次性生产出合格的河沙、铁沙、沙金、石子等几种产品，其优点是效益高、成本低。

Of the individual-owned enterprises, mainly engaged in the range of hydraulic mining machinery complete sets of equipment production and sales, its main products are: supporting products and coal mining test equipment maintenance.

系个人独资企业，主要经营范围为矿用液压机械成套设备的生产与销售，其主要产品为：煤矿支护产品和矿用试验检测维修设备。

The extraction rate of coal in hydraulic coal mining is subject to the influence of a number of factors, and it varies widely, bepending on mining conditions.

水力采煤的原煤采出率有很多影响因素，由于开采条件不同，采出率差距很大。

The product has to bear the high stress, bending radius of the small, anti-fatigue performance, long life and other characteristics, widely used in metallurgical side casting, oil drilling, engineering machinery, mining and all kinds of hydraulic mining machinery.

本产品具有承受压力高、弯曲半径小、抗疲劳性能强、使用寿命长等特点，广泛应用于冶金边铸、石油钻探、工程机械、矿山采掘及各类液压机械等。

Rock burst was easily happened at chain pillars between hydraulic mining face and drying mining face.

在水采工作面和旱采工作面交接的护巷煤柱处，极易发生冲击矿压事故。

TODAY, deep-ocean mining is done only by the oil and gas industry. Yet the dream of mining the mineral wealth of the deep has never gone away.

位于温哥华的鹦鹉螺矿业公司是这两家公司里比较超前的一家。

Firstly, two examples, which belong to static analysis and dynamic analysis respectively, were given to show the effectiveness of discrete element method. Then the discrete element method was used to perform dynamic analysis of the Chinese 1 km deep-ocean mining system. The dynamic performance of the entire mining system under different current directions was discussed and compared with that from finite element method.

首先，从静态分析和动态分析两方面，给出2个典型算例，证明该方法的有效性；然后，将离散元方法用于中国1 km深海采矿系统的动力学分析，讨论不同海流方向下整体系统的联动性能，并与有限元方法进行对比。

There were three key aspects in this technique:(1) rapid mining of longwall coalface;(2) Calculation to determine the reasonable supporter resistance;(3) reduce mining height partially or filling partially.

此项技术的关键有三：一是长壁工作面快速推进；二是支架合理支护阻力的计算确定；三是局部降低采高或局部充填。

I selected a typical section to make a series of study, got the deformation trend and evolution regulation of subgrade from model experiment after the coal was mined which lie concealed in the subgrade, made evaluation with ration about influence of mining under subgrade using FLAC soft such as confirming the "ARC-BED"slide model and slip scope, calculated the F.S. of subgrade slope used limit equilibrium theory, and advance particular measure for the PingShuo Coal Mining Company.The engineer analyse of subgrade stability caused by karst cavity was relied on a collapse accident happened in ChangJin expressway.

文中先对所选取的代表性断面进行了模型试验，从直观上得到煤层开采后上部路基工程变形趋势及其发展规律；然后运用数值方法，定量评价了采动对路基及边坡的影响作，确定了路基边坡发生破坏的&圆弧—顺层&模式及范围，并运用极限平衡方法对边坡的安全性作出了评价，最后提出了具体的处治建议，为保证道路的正常营运与矿区安全生产提供了科学依据。

It has to be computed by the host for the actual clock rate.

主控制器可以用来计算实际的时钟速率。

Let's see what you got.

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