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- Influence of Gob Shield Angle on Top Coal Recovery Ratio 综放支架掩护梁角度对顶煤回收率的影响
- Keywords coal caving mining;agglomeration;coal caving ratio;coal recovery ratio;distortion rule; 放顶煤开采;块度;放出率;煤炭回收率;变形规律;
- Improving Top Coal Recovery Ratio in Full-mechanized Sublevel Caving Faces by Long-hole Controlling Presplitting Blasting Technology 利用深孔控制预裂爆破技术提高综放工作面顶煤回收率
- coal recovery ratio 煤炭回收率
- top coal recovery ratio 顶煤采出率
- The standard add recovery ratio was 92.6%,RSD was(n=11)<7.5%. 标准加入回收率为92.;6%25。 变异系数(n=11)<7
- After using the fuzzy-PID control system,the stability of the refined coal quality is guaranteed and the recovery ratio is increased. 选用基于模糊理论的PID控制系统后,有力地保证了精煤质量的稳定和回收率的提高。
- 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。
- Sublevel caving technique has been utilized in Datong mining area under hard rock and hard coal, problems including low recovery ratio and spontaneous fire in gob have been overcome to achieve safe and high prodction. 大同煤矿集团“两硬”条件侏罗纪厚煤层下分层工作面应用低位放顶煤开采技术,解决了传统工艺所造成的煤炭资源回收率低、空区自然发火危险程度高等技术难题,实现了安全高效开采的目的。
- The top coal's recovery ratio in fully-mechanized sublevel caving face controls the stowing degree of the goaf, thereby influences the stability of hard and massive overlying roof. 摘要综放采场顶煤放出率控制着采空区的充填状况,从而影响着大厚度坚硬顶板的稳定性。
- 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。
- Determined results at those conditions indicate that the RSD is 4.96% and the recovery ratio is between 99.3% and 104%. 加标回收率为99.;3%25-104
- To enhance recovery ratio, it is necessary to have a better understand on the micro-heterogeneity of reservoir. 要提高这部分油层的采收率,必须加强对储层微观非均质性的认识。
- The minimum detection limit of this method is 1.5 Bq/L, The precision is 10% , The recovery ratio is 97% - 100% . 方法的检测限为1.;5Bq/L;精密度为10%25;放化回收率为97%25-100%25。
- 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。
- After reducing smelt spent lithium ion battery in arc furnace,the recovery ratio of cobalt and coppe... 用电弧炉还原熔炼后;钴回收率78.;63%25;铜回收率81
- The recovery ratio of scheelite was 5.74% higher in 1999 than 1998,and get a good economic profits. 1999年与1998年相比,白钨精矿作业回收率提高了5.;74%25,获得了较好的经济效益。
- Acupuncture can improve the recovery ratio of injuried sciatic nerve in MCV and MAP, as is in accordance with the myodynamia of wounded limbs. 针刺能明显改善坐骨神经损伤后运动神经传导速度(MCV)、诱发动作电位波幅(MAP)的恢复,并与患肢的肌力相一致。
- The method is easy in operation and accurate in outcome with a recovery ratio of 93.9% and a variation coefficient of 1.4%. 方法简便、准确.;回收率93
- The experimental result shows that the quality of product comes up to the standard ofP.R.C,and the recovery ratio gets to 88%. 本文扼要介绍利用工业废镍催化剂制结晶硫酸镍的实验研究。实验结果表明,其产品质量达到国家标准,回收率达88%25。