查询词典 coal mining

Post-mining or gob preventive injection, sand-filling or sealed separation in the gob with potential spontaneous fire, Visional judgement or index jndgement for prediction, nitrogene-injection for fire prevention, and control, spraying oxidation retardent to delay coal oxidati...

同时提出某些预防煤田自燃发火的对策——采后或采空区预防性注浆；对可能产生自燃火灾的采空区注砂或充填，加以封闭隔离；采用直观判断、指标判断等方法进行预测预报：注氮防灭火；喷涂阻化剂以延缓煤氧化；选择合理的开拓方式和回采方法：选择合理的通风系统和利于防火的通风方式；控制向采空区的漏风等。

This study provides a scientific method about studying the gas content of the coal seam unmined and provides the basic data about the safe mining.

这为未开采煤层瓦斯含量的研究提供了科学方法，并为该煤矿的安全开采提供了基础资料。

On the basis of reorganization statistics and mapping analysis of geological structure data from exploration, mine building and mining, the author has systematically summarized the development features, combination and distribution regularities of geological structures in mined area, and carried out forecast of geological structures in unmined area in Xiangshan coal mine.

摘要： 通过对象山井田勘探、建井及采掘生产以来的地质构造资料进行整理、统计和作图分析，系统总结了已采区断层构造的发育特征和展布组合规律，并对井田未采区的地质构造进行了预测。

In the process of mining, much research was conducted on the control and reduction of the radiation hazards in underground uraniferous coal mine.

我国煤型铀矿资源的储量在我国铀矿资源总储量中占有一定比例。20世纪60年代后期我国开始了这类铀矿床的地下开采，在开采期间，对控制这类铀矿床地下开采中辐射危害的技术与管理措施开展了大量研究。20世纪80年代后期，因为多种原因，这类矿山被关闭。

Under the condition of mining pressure the flow pressure of gas in fissured coal fluctuates at the beginning of seepage, and the amplitude depends on the differential pressure between the two ends of flow field.

在采动压力条件下，瓦斯在裂隙煤体中的流动压力具有波动性，波动幅度的大小与流场两端的压力差有关。

The simulation result demonstrate that the mining differential pressure has a great impact on the flow velocity the porosity pressure and the pressure gradient of gas in fissured coal.

模拟结果表明，采动压力差对瓦斯流动速度、孔隙瓦斯压力及瓦斯压力梯度都有很大的影响。

This paper briefly introduc es the recessing course of the unified technical specifications for the railway design of the coal industry , and connecting with the featur es of the mining areas , mak es analysis and discussion on several technical standards and design parameters adopted by the design of the special railway lin es .

简要介绍了煤炭工业铁路设计统一技术口径修订过程，结合矿区的特点，对专用线设计采用的几个技术标准，设计参数进行了分析论述。

Particularly as a combined entity would dominate the world mining business as a leading producer of copper, aluminium, uranium and coking coal as well as rivalling Brazil's CVRD as the biggest supplier of iron ore.

特别是作为一个联合的实体，它在未来将成为世界上很多领域的主要制造商，比如铜、铝、镍和煤，同时将成为巴西在铁矿石供应上的有力竞争者。

In view of the problems occurring in trapezoidal support used in coal seam gateway, a novel small-curvature arch support for mining engineering is presented.

摘要针对煤层顺槽梯形支架存在的问题，提出一种新型结构的小曲率拱型支架。

According to the actual conditions, choose the proper index gas. And KJ-XL beam tube observation system is developed. The natural fire nonage forecast technique system composed of infrared detection, beam tube observation and coal temperature auto-observation scope, realizes the nonage forecast to the No4326 over length fully mechanised mining working face successfully, and reduces the fireproofing scope.

根据4326超长综放工作面的实际情况，选用了合适的指标气体，研制了KJ-XL束管监测系统，提出了以红外探测、束管监测和煤体温度自动监测系统为主的自然发火早期预测预报技术体系，成功地实现了4326超长综放工作面的早期预测预报，缩小了防火范围。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。