In the early days of underground coal mining, pit canaries often had short but valuable lives.
早期地下采煤的时候，矿井中的金丝雀常常拥有短暂而有价值的一生。
This paper introduces the design method for a kind of the explosion-division intelligent electromagnetic starter specially used in the fans of the underground coal mining district.
介绍了一种煤矿井下对旋式风机专用隔爆型电磁启动器的设计方法。
The results provide an objective theoretical basis for further studying the optimization of seismic monitoring network arrays, which can support other monitoring tools in underground coal mining.
这些定性和定量的研究结论将为进一步研究微震监测台网布置的优化方案提供理论依据，也可为其他地球物理监测或探测手段提供实测的基础参数。
Mobility between surface mining, underground mining, coal or metal mining sectors may be limited by differences in production technologies and licensing requirements.
表面开采，地下开采，煤或金属采矿行业之间的流动性可能会因生产技术和许可要求的差异而受限制。
This paper presents the usage and maintenance of utilizing two engines to drive underground conveyer belt in Tongting Coal Mine, Huaibei Mining Group.
介绍淮北矿业集团公司童亭煤矿井下皮带输送机双机拖动使用、维护的实况及防范措施。
Infection zones of coal mining are favorable place to coalbed methane recovery in ground or gas extraction in underground.
煤矿采动影响区是地面煤层气开发或井下瓦斯抽放的有利部位。
Provincial certification as an underground mine supervisor, shift boss, or coal mining supervisor may be required.
地下矿监，值班班长，或煤矿主管需要省级认证。
This paper analyzed the problems of the belt deviation for belt conveyor of the underground coal-mining, and summarized the corrective method for preventing the belt deviation of the belt conveyor.
针对煤矿井下胶带输送机胶带跑偏问题进行了分析，总结出了输送机胶带防止跑偏的防治方法，对胶带输送机在现场的使用和维护具有一定的实用价值。
The move crevasse superimposes mutually and constitutes the complex underground crevasse network, which are produced by geologic structure crevasse in Fuxin Basin and mining coal.
盆地内地质构造断裂和采煤活动中产生的采动断裂互相叠加，构成了十分复杂的地下断裂网络。
Medium frequencies and horizontal magnetic dipoles (vertical loop antennas) can be used in underground radio communication in mining sections of coal mines.
中频频率和水平磁偶极子天线(垂直环状天线)是井下采区无线通信可使用的频段和天线型式。
Zhengzhuang mining Field is a newly-built mine and the mining of its lower coal seams is subjected to the threat of underground water.
成庄井田为新建矿井，下部煤层开采受地下水的威胁。
We are puzzled by the pervious to water, the underground coal seam fire prevention, the question of deep zone mining and coal mining from incidence in Jixi.
透水、地下煤层防灭火、深部开采问题、大倾角采煤已经成为困扰鸡西煤炭开采的技术问题。
Taking a certain coal mine as example, a calculation formula has been proposed which can be used to evaluate the roadbed stability of highway disturbed by underground mining.
以某煤矿为例，提出了路基稳定性的计算公式，可用于评价地下采动公路的路基稳定程度。
The technique has been successfully used in Xingdong coal Mine and the good results of disposing waste in underground and mining coal resource under the surface building have been realized.
此项技术在邢东矿井得到成功应用，实现了矸石井下处理与建筑物下煤炭资源的开采利用。
Because of intense underground mining, thousands of acres are prone to sinking, and hundreds of villages are blackened with coal waste.
由于地下的过度采掘，数千英亩的地层塌方，数百个村庄被煤灰污染。
This paper describes the corrosion surroundings of Chinese underground collieries and the present protection state of coal mining equipment.
阐述了我国煤矿井下的腐蚀环境和采煤设备的防护现状。
The paper presents uniform method of evaluation mining geological and technological conditions for application of rock bolting in Polish underground coal mines.
针对波兰煤矿地下开采中的锚杆支护应用实践，提出了统一的采矿地质和技术条件的评价方法。
As the use of coal underground mining face of electrical equipment and control equipment, must be flameproof or intrinsically safe type equipment.
但是由于在煤矿井下采掘工作面使用的电气设备和控制设备，必须是隔爆型或本质安全型设备。
Exploit in the mining machine underground used in the coal directly, it is one of the most important mechanical equipment in production on the coal.
采煤机直接用于煤炭的地下开采，是煤炭生产中最重要的机械设备之一。
The control device had been applied to the coal mining face in Shanxi Pingshuo Underground Mine. The design of the control device could meet the actual requirement as verified.
该控制装置已经应用于山西平朔煤矿工作面现场，经过半年的实际使用，验证该设计切合实际需求。
It is a significant problem of mining area subsidence resulting from underground coal mine mining, which resulted in soil resources destruction, even a lot of waterlogging in the high water level.
因地下煤炭开采导致的矿区塌陷是目前矿区的主要问题之一，这些塌陷造成土地资源破坏，在高水位甚至出现积水。
There are plenty of water resources and land resources to be reclaimed in subsided land of mining coal with higher level of underground water on plains.
平原区高潜水位采煤塌陷土地拥有丰富的水资源，地势低洼，土壤接近饱和湿度，为人工湿地的规划建设提供了良好的自然条件。
There are plenty of water resources and land resources to be reclaimed in subsided land of mining coal with higher level of underground water on plains.
论述了利用煤矿塌陷盆地作为氧化塘和土地处理系统处理煤矿井下水和矿区生活污水的工艺原理、特点、工程设计及其产生的社会和环境效益。
There are plenty of water resources and land resources to be reclaimed in subsided land of mining coal with higher level of underground water on plains.
论述了利用煤矿塌陷盆地作为氧化塘和土地处理系统处理煤矿井下水和矿区生活污水的工艺原理、特点、工程设计及其产生的社会和环境效益。
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