recovery ratio

Ways on improving top coal recovery ratio in fully-mechanized caving mining face;

提高综放工作面顶煤回采率的途径

Influencing factors and improving methods for recovery ratio of sub-level caving coal blasting mining;

炮采放顶煤回采率影响因素与提高方法

For coal bed of f=3,the research should focus on the lump coal rate;for coal bed of f=4-6 and above,the research should focus on enhancing the recovery ratio.

对于f=3左右的煤层,重在研究提高块煤率;f=4-6及以上的煤层,重在研究提高回采率。

Using the probability of improved recovery rate,the number and extent of adjustment and the new recovery rate,recovery rate uncertainty is described.

回采率是储量不确定的重要参数之一。

When the fully mechanized caving mining is put into practice in the medium hard coal seam,the high-pressure water injection is carried out,the coal nature is softened,the recovery rate is significantly raised.

在中硬煤层中实施放顶煤开采时,对煤层打钻进行高压注水,软化煤质后回采率明显提高。

Discussion on ways to increase mining rate in fully mechanized top-coal caving working face;

综采放顶煤工作面提高回采率途径的探讨

The several methods of increasing the mining rate of coal faces are stated from these aspects: improving the techniques of blasting coal down the roof,using suitable facilities,self-developing coal-saving machines,and making proper mining system.

结合实际,系统地分析了影响轻放工作面回采率的各种因素,从改进放煤工艺增加配套设施、自行研制节煤器、合理开采设计等几个方面入手,阐述了提高轻放工作面回采率的几种途径。

In order to solve the contradiction of protecting the buildings on the ground and the mining rate of coal, the mining method of wide strip skip-mining is put forward by making the most of the advantages of both methods of the wide strip mining and full-pillar mining,and combined with the law of the ground move and deformation.

为了解决保护地面建筑物与煤炭资源回采率的矛盾。

Lifting combined mining extraction rate;

从多方面入手 提高综放采区回采率

Talking about the technology ways of lifting extraction rate;

浅谈提高回采率的技术途径

It shall see to it that the recovery rate and impoverishment rate in mining and recovery rate in ore-dressing meet the design requirements.

矿山企业的开采回采率、采矿贫化率和选矿回收率应当达到设计要求。

Adopting a Number of Effective Measures to Increase Coal Resources Recovery Rate;

采取各项有效措施 努力提高煤炭资源回采率

Calculation Method of Annual Mining Recovery Index in Mining Enterprise;

谈矿山企业制定年度开采回采率指标的方法

Increasing Rate of Coal Mining with Improving Coal Caving Technology at Fully Mechanized Face

改进综放工作面放煤工艺提高回采率

(2) difficult prop (supporting) management, much resource loss and low recovery;

(2) 支柱(护)管理困难，资源损失多，回采率低；

Tax and Fees Collection Measure of Enhancing Total Recovery Coefficient of Coal Mining;

提高煤炭资源总回采率的税费征收方式

Increasing of ore recovery rate and decreasing of ore loss & dilution rate in the case of pillarless sublevel caving

浅析无底柱分段崩落法提高矿石回采率

The Significance of Ratio of Mining Recovery and Its Influences on Charge of Compensation Tax for Mineral Resources;

开采回采率系数的意义及其对矿产资源补偿费影响的探讨

This method can improve the ore extraction rate and reduce the ore dilution rate and has been found to be a rational mining method for the mine.

该方法提高了矿石的回采率，降低了矿石的贫化率，为矿山寻找出一条合理的开采方法。

Probe into Improving Recovery Ratio of Caving Coal at π Steel Beam Caving Coal Face by Deep Hole Pre-Fracture Blasting

深孔预裂爆破提高π型钢梁放顶煤回采率可行探讨

The rate of extraction for coal resources shall be determined by the department in charge of the coal industry under the State Council in light of the different resources and mining conditions.

煤炭资源回采率由国务院煤炭管理部门根据不同的资源和开采条件确定。

The improvement of recovery rate of gold and copper by using flash flotation

采用闪速浮选提高金、铜的选矿回收率

Study on top-coal recovery in full-mechanized by similarity simulation

综放开采顶煤回收率的相似模拟研究

Optimizing Mining Design Technics and Improving Resource Rate of Recovery

优化开采设计工艺 提高资源回收率

Research on Relationship of Mining Height and Recovery of Top-coal in Full-mechanized Caving Mining

综放开采割煤高度与顶煤回收率相互关系研究

Second Mining Is an Effective Way for Small and Medium-sized Coal Mines to Increase the Coal Recovery Rate

复采是中小煤矿提高煤炭回收率的有效途径

A Design of Digital Video Collector, Communication, Replay System with Wavelet;

一种基于小波变化编码的视频低速率采集、传输和回放系统的设计

Study on Relationship between Depositing Characteristic of Falling Waste and Top Coal Recovery in Full-mechanized Caving

综放开采冒落矸石堆积特征与顶煤回收率关系研究