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- It is key problem to raise the top coal recovery rate of the fully mechanized sublevel caving mining. 提高顶煤放出率是综放开采的一个重大课题,预注水弱化顶煤是解决这一问题的有效方法之一。
- Ways of raising coal recovery rate in mire 提高矿井煤炭回采率的途径
- Keywords millisecond blast;coal recovery rate;roof management; 毫秒爆破;煤炭回收率;顶板管理;
- Study and test for recovery rate of the top coal in fully mechanized face using caving method and the methods for raising the coal recovery rate 综放面顶煤回收率试验研究及提高回采率的途径
- coal recovery rate 煤炭回收率
- top coal recovery rate 顶煤采出率
- The average recovery rate is 98% to add tetramine into the samples. 样品加标平均回收率为98%25。
- Results:every group bacetrium recovery rate:ou higher than70%. 结果:各组菌回收率均高于70%25。
- The mean recovery rate was 103% and the CV was 4.3%. 平均回收率为103%25;变异系数为4.;3%25。
- The recovery rate of the treatment with azithromycin was 70%. 阿奇黴素治愈率94.;44%25,红毒素治愈率70%25。
- The average recovery rate of MgSO4 was 99.3% with RSD of 0.66%. 硫酸镁的含量测定,中药成分无干扰,平均回收率为99.;3%25,RSD=0
- The average recovery rate of MgSO4 was 99.3 % with RSD of 0.66 %. 硫酸镁的含量测定;中药成分无干扰;平均回收率为99.;3%25;RSD=0
- The severe inclined thick coal seam,being its special geological storage conditions,is weakly extracted and the recovery rate is comparatively low. 急倾斜特厚煤层因其特殊的地质赋存条件,导致开采强度小,资源回收率低。
- CAO Yu-xunThe clean coal recovery has increased by 6.8% at Shenhua Group Co. through the recovery of clean coal lost in middlings by using middlings rewash system. 神华集团乌达矿业公司凯鸿煤化有限责任公司通过增加中煤再洗系统;回收中煤中损失的精煤;从而使精煤回收率提高了6.;8%25。
- The iron grade can be 54.16% and the recovery rate 92.46% after reductio... 经过还原处理的样品获得了较好的指标;铁品位54.;16%25;回收率92
- The applied effect showed that this way can improve cyaniding recovery rate. 应用生产后,提高了氰化回收率;
- Result: the average recovery rate of Astragaloside IV reaches 97.6%, RSD=0.55%. 结果:黄芪甲等的平均回收率为97.;6%25,相对标准偏差RSD=0
- Applying the methods put forward in this paper, it was explanted that the basic relevant relations between the coal recovery an earth surface sink, regarding the Shendong mining area as the case. 应用本文提出的方法,以神东矿区为案例,说明了开采回采率和地表沉陷的基本相关关系。
- Finally LOD, linearity scope, precision and recovery rate are obtained. 通过实验得到方法检出限、线性范围、精密度、回收率等数据。