煤矿

China's State Administration of Work Safety says it has shut down 685 small collieries this year in an effort to improve mine safety.

中国国家生产安全监督管理局声称今年已有685家小煤矿被勒令关闭，以改善煤矿的安全生产。

But in the other hand, the collieries in the epoch were few, their output was little, and their effect was little too. Anyway they became the base of the ones in the Republic of China.

虽然这一时期创办的新式煤矿数量少，产量小，发挥的社会作用并不大，但它为民国时期煤矿的发展奠定了基础。

On the ground of this, according to the practical conditions of the collieries in Fuxin, chose the appropriate colliery to the ZY3600/12/27.5L hydraulic support.

在此基础上根据阜新各煤矿的实际情况，选择了适合ZY3600/12/27.5L型液压支架使用的煤矿。

On the ground of this, according to the practical conditions of the collieries in Fuxin, it chose the appropriate colliery to the ZY3600/12/27.5L hydraulic support.

在此基础上根据阜新各煤矿的实际情况，选择了适合ZY3600/12/27.5L型液压支架使用的煤矿。

It compartmentalizes safety assessment sorts, puts forward the notion of macroscopical safety assessment and microcosmic safety assessment and analyses and compares the two notions, and emphatically analyses the significance, effect and request of mine macroscopical safety assessment and the necessity of developing it.

本文对安全评价进行了概述，重点介绍了安全评价的概念、基本原理、内容、目的、作用及功能特点，给出了安全评价的类别划分，提出了宏观安全评价与微观安全评价的概念，对它们进行了分析与比较，并着重分析了煤矿宏观安全评价的意义及作用与要求以及开展煤矿宏观安全评价的必要性。

Facts: The coal company deeded the surface land above a mine to Mahon's predecessors in title.

煤矿公司立约转让煤矿表面的土地给马宏的前辈。

The paper introduces the computer interior management and drawing system on the engineering survey of coal mining and roadway driving. This system standardizes the computer interior management, intellectualizes drawing, storing, and editing. It is used well in Jinpushan Coal Mine.

介绍了煤矿采掘工程测量的计算机内业管理和绘图系统，该系统实现了矿井测量工作内业管理的标准化，实现了采掘工程图件的计算机绘制、存储和编辑的智能化，在晋普山煤矿实际应用效果良好。

This thesis keens on the DM utilizing research in coal mine gas forecasting. It is explained about domestic and outboard researching present conditions of time series data mining, time series analysis, formalized expression and model establishment of time series. Through analysising the features of coal mine gas observing data and several species of model. This thesis declares a suitable data and model ARMA.

本文的主要研究方向是时间序列数据建模及其在煤矿瓦斯预测中的应用研究，文中就时间序列数据建模的国内外研究现状、时间序列分析、形式化表示和时间序列的建模等进行了详细的论述，在分析了煤矿瓦斯监测数据的特点和多种模型的特征基础上，提出了本文所适用的数据模型为ARMA，同时，对特定的数据进行了数据建模，并对结果进行了分析和验证。

But the Heilongjiang accident hit one of the bigger, more reputable state-owned mines, underscoring just how difficult it remains to safely extract the black rock.

但是，黑龙江的事故却发生在规模更大、更知名国有煤矿之一，这凸显出了煤矿安全生产的难度。

This paper is based upon XiShan Colliery Parent Company .The data of DongQu Mine pit ventilation resistance mensuration is combined. And system theory, graph theory, ventilation network technology and computer technology are utilized. According to the reality of coalmine, we think that graph and database is incorporate in mine ventilation system. So based on this, ventilation system standard graph is founded, the tool of ventilation graph to draw is made, the ventilation network calculation is realized, the outcome of the ventilation network calculation is seen on the screen, and opaquing and inquiring of the road parameters and so on. In addition to mine ventilation drawing-database visual management system is developed.

本文基于西山煤矿总公司东曲矿〖东曲矿矿井通风网络计算机管理系统〗科研项目，结合东曲矿矿井通风阻力测定，运用系统理论、图论、通风网络技术及计算机技术，针对煤矿实际，将矿井通风系统中图形和数据库贯穿为一体，创建了通风系统标准图库并编制了通风图形绘制工具，实现了风网解算和解算结果图形显示及巷道参数的修改、查询等功能，开发了矿井通风图形数据可视化管理系统。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐