论文部分内容阅读
煤矿开发建设活动破坏了原地表植被和土壤结构,形成的人为扰动地面水土流失剧烈。采用野外放水冲刷试验,研究神府东胜煤田原地面与扰动地面产流、产沙以及水动力学参数的变化规律。结果表明:扰动地面产流时间小于原地面,产流强度是原地面的1~2倍;扰动地面的初始含沙量是原地面的10~30倍,产沙强度是原地面的10~50倍;扰动地面的雷诺数和阻力系数均大于原地面,弗劳德数差异不显著;不同坡度、不同流量2种处理类型的产沙强度与产流强度呈指数函数关系,产沙强度和雷诺数呈幂函数关系,产流强度和雷诺数呈幂函数关系。研究结果对矿区扰动地面水土保持生态环境建设具有重要的参考意义。
Coal mine development and construction activities destroyed the original surface vegetation and soil structure, resulting in man-made disturbance of soil and water erosion. Field water scouring test was used to study the variation law of the original ground surface and disturbed ground runoff, sand production and hydrodynamic parameters in Shenfu Dongsheng coalfield. The results show that the disturbed ground runoff time is less than that of the original ground and the current intensity is 1 ~ 2 times that of the original ground. The initial sediment concentration of the disturbed ground is 10 ~ 30 times that of the original ground and the sediment yield is 10 ~ 50 The Reynolds number and drag coefficient of the disturbed ground are both greater than those of the original ground and the Froude numbers are not significantly different. The sand production intensity and runoff intensity of the two kinds of slope with different flow rates are exponential, The number is a power function relationship, the output intensity and Reynolds number showed a power function relationship. The results of this study have important reference significance for disturbing soil and water and soil and water conservation in the mining area.