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- compound mining coal seam 复采煤层
- Through analysis to sedimentary condition of stratum coal measures,deposit state and changing regular of coal seam were known,it has directive significance to mining coal seam and safety producfion. 通过对煤系地层沉积环境进行分析,可以了解煤层的赋存状态及其变化规律,对煤层的开采和安全生产具有指导意义。
- Assign face scope at triangle coal seams,make use of engineering mathematics,optimize face designs to mine coals to the maximum. 在煤层三角形区域内布置回采工作面,利用工程数学,优化工作面设计,最大限度地回采煤炭。
- Keywords Electromagnetic Tomography;Cap rock destruction;Mining coal seam;Crosswell method;Fractured zones.; 电磁波层析成像;覆岩破坏;煤层开采;井间方法;破碎带;
- Study on the technique of roof gas drainage from mine coal seam in Huainan mine area 淮南矿区开采煤层顶板抽放瓦斯技术的研究
- The company is mining coal in the south of country. 该公司正在国家的南部开采煤矿。
- The development of this compound technique of perforating in fracturing blasting of coal seam showed a very promising applicable future. 该技术在煤层致裂爆破以及其他领域的多方向发展,具有良好的应用前景。
- Usually for mining maximal coal resources,repeated mining is used especially in specially thick coal seam. 为了最大限度的开采煤炭资源,通常进行复采,尤其是特厚煤层。
- Coal miners; coal seams; coal haulers. 煤矿工; 煤层; 运煤工
- Water-coal mixture burst is a new mine disaster in exploiting steeply inclined thick coal seam mining. 摘要急倾斜厚煤层开采时发生的水煤体溃泄是一种新的矿井灾害。
- The example of the large dip angle and the coal seam group is the Yuexu area in Tangshan Mining Filiale. 大倾角、煤层群采煤设计以开滦唐山矿业分公司重点衔接区域岳胥区-680水平采区为设计对象。
- The coal seam tunnel of compound mudstone roof of large span is the tunnel that is violent out of shape,roof is easy falling and safeguard is very difficult. 大跨度复合泥岩顶板煤层巷道是围岩变形剧烈且顶板易冒落、极难维护的巷道。
- At one time they used to mine coal in these valleys. 从前他们在这些峡谷中采煤。
- Coal seams intermixed with iron ore. 煤层和铁矿混杂在一起。
- The man mines coal where day seems like night. 这个人在即便是白天也犹如晚上的地方开采煤炭。
- Abstract: The influence factor of spontaneous ignition on coal seam mining and protective measures in Yangquan mine No.3 shaft are approached. 文摘:分析了阳泉矿区三矿井田煤层开采对自燃着火的影响因素,探讨了预防煤层的自燃着火的开采技术措施。
- The influence factor of spontaneous ignition on coal seam mining and protective measures in Yangquan mine No.3 shaft are approached. 分析了阳泉矿区三矿井田煤层开采对自燃着火的影响因素,探讨了预防煤层的自燃着火的开采技术措施。
- Local people have been mining coal here since the sixteenth century. 当地人从16世纪开始就在这儿开采煤矿。
- The Taiyuan Formation No.16 coal seam in Yanzhou coal mining area is researched with the micro study method systematically. 用微观研究的方法,对兖州矿区太原组16号煤层的煤相进行了研究。
- The Gaussian curvature of No.3 coal seam in Qinshui basin is calculated. 计算了沁水盆地3号煤层的高斯曲率。