To raise coal recovery ratio and solve the key problem of full-dimension mining, a new “3-section” technology of full-dimension mining is put forward in flat thick-seam according to the theory and mining practice. T...To raise coal recovery ratio and solve the key problem of full-dimension mining, a new “3-section” technology of full-dimension mining is put forward in flat thick-seam according to the theory and mining practice. This technology is proved to be rational and feasible in rodway layout system of stagger arrangement.展开更多
实验研究了RP-3沿流向结焦分布规律以及进口质量流量对其产生的影响。实验将RP-3加压至5Mpa,使用2.1 m长不锈钢管(1.8 mm I.D.、2.2 mm O.D.、1Cr18Ni9Ti)中将流经其中的RP-3从127℃等热流加温至427℃.在定质量流量前提下,改变进口质量...实验研究了RP-3沿流向结焦分布规律以及进口质量流量对其产生的影响。实验将RP-3加压至5Mpa,使用2.1 m长不锈钢管(1.8 mm I.D.、2.2 mm O.D.、1Cr18Ni9Ti)中将流经其中的RP-3从127℃等热流加温至427℃.在定质量流量前提下,改变进口质量流量0.39、0.78、1.17和1.56 g/(s·mm^2),研究了进口雷诺数对结焦规律的影响.实验结果表明:随着质量流量的增加,RP-3结焦峰值位置逐渐向后推移;管壁平均结焦速率受与进口雷诺数的0.89次方成正比关系;单位质量RP-3结焦生成量随进口雷诺数的增加先减少后增加.展开更多
基金The National Important Technique Innovation Item ( No.[2 0 0 1] 44 1)
文摘To raise coal recovery ratio and solve the key problem of full-dimension mining, a new “3-section” technology of full-dimension mining is put forward in flat thick-seam according to the theory and mining practice. This technology is proved to be rational and feasible in rodway layout system of stagger arrangement.
文摘实验研究了RP-3沿流向结焦分布规律以及进口质量流量对其产生的影响。实验将RP-3加压至5Mpa,使用2.1 m长不锈钢管(1.8 mm I.D.、2.2 mm O.D.、1Cr18Ni9Ti)中将流经其中的RP-3从127℃等热流加温至427℃.在定质量流量前提下,改变进口质量流量0.39、0.78、1.17和1.56 g/(s·mm^2),研究了进口雷诺数对结焦规律的影响.实验结果表明:随着质量流量的增加,RP-3结焦峰值位置逐渐向后推移;管壁平均结焦速率受与进口雷诺数的0.89次方成正比关系;单位质量RP-3结焦生成量随进口雷诺数的增加先减少后增加.