采矿

In this thesis,the authors analyze the mechanism of roadway roof absciss layer ,point out the demerits of traditional methods of measuring roadway roof absciss layer , treatise the principles and put forward some methods of measuring absciss layer by minging vibration method.

分析了巷道顶板离层的机理，指出了传统测量离层方法的弊端，论述了采矿振动法测量离层的原理，提出了采矿振动法测量离层的方法。

By air-hardening period, water-hardening period, strength period, It is simple and clear to sum up that the hydration reaction feature of LFC is different from the portland cement, lime.

目前，已建立生产厂家，在建筑和采矿工程中应用。我国低标号水泥很少，常用高标号的水泥配制砂浆和采矿充填材料，这很不合理。LFC具有吃粉煤灰量大，用途广泛，成本低，性能好等特点。

It exerts important significance on sci-tech history of mining and smelting and historical culture research, since this mine is one of a few rare mines in China that are qualified to restore the technique scenes of "decrepitating method" mining and "cupellation method" smelting.

公园拥有诸多采矿遗址，其中黄岩坑古矿硐规模最大，保存最完整，古代文献记载最丰富详实，是国内稀有的有条件恢复"烧爆法"采矿、"灰吹法"冶炼工艺场景的矿山，对矿冶科技史和历史文化研究具有重要意义。

The lowering of mining dilution ratio and loss ratio is one of major difficulties in front of mining researchers.

采矿贫化率与损失率的降低是采矿工作者重点研究和攻克的难点之一。

The details are described as follows:Based on the principles of elasticity and plasticity mechanics theories, we finish an analysis of the stability near the 1150 horizontal jamb in theory and simulate the stress situation and the stability of the rock mass in the mining processes. Through the analysis on the numerical results and the types of the breakages in underground roadway we evaluate the stability and the security of this area and predict the possible breakages in the future.

具体内容包括：应用弹塑性力学的观点和方法，对二矿区1150中段水平矿柱附近区域的稳定性进行了理论分析，对矿区岩体在采矿过程中的受力状态和稳定性进行了计算机模拟，分析了工程布置区巷道破坏的原因和类型，并对水平矿柱矿体稳定性和采矿安全性进行了评估，对矿区将来可能发生的不利于生产的破坏形式进行了定性预测。

The paper discusses main environmental geology problems caused by mining of coal, such as mining slump, land subsidence. Karst slump, soil hole slump and groundwater meagerness, pollution caused by mine water and coal gangue.

概述了淮南矿区采矿引起的负环境效应，如采矿塌陷、地面沉降、矿坑排水疏于引起的岩溶土洞渴陷、地下水枯竭、矿井水和煤矸石对环境的污染等。

In the tunnel tunneling and in the process of the working surface mining, we can find out the water fault and the structure in advance, investigates thoroughly the hydrogeological conditions, and adopts seals off measure and some other reinforcement, it is a essential method that can realizes the under the water body and the bearing pressure aquatic security mining.

在隧道透纳和工作表面的采矿的程序中，我们能预先发现水过失和结构，彻底地调查 hydrogeological 情况，而且从尺寸和一些其他的增强收养印章，它是能了解的一个必要的方法那在水体和举止压力水生动物安全采矿之下。

Mining methods can be divided into open-pit mining, underground mining and exploitation of three kinds of liquid basic mining methods.

采矿方法可大致分为露天开采、地下开采和液体开采3种基本采矿方法。

The result shows clearly that a production management was controlled thus the indexes of ore loss and dilution ratio were reduced and the ore dressing recovery percentage was raised and eco...

试验结果表明：通过生产过程管理控制，降低了采矿贫化率和采矿损失率，提高了选矿回收率，增加了矿山企业的经济效益

We analyse briefly owes main reasons that the area ecological environment destroyed,and emphasize necessity that retire the area of mining abandoning field of Dongma countryside in Xi Chou County and we aimed at problem that have had ,and exemplify restroyed suggestions that a few minings abandon the field ecological environment restoring measure , mainly it includes the measure of education and concept,the measure of science and technology,project measure, ecological measure, policy and law measure.

中文摘要：在综合评价董马乡采矿废弃地的生态环境基础上，结合科学发展观的基本要求，简要分析该地区生态环境破坏的主要原因，并强调西畴县董马乡采矿地区生态坏境的必要性，针对存在的问题，着重提出一些采矿废弃地生态环境的整治修复措施，主要包括教育与观念措施；科学技术措施；工程措施；生态措施；政策法律措施。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。