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Full-Text Articles in Engineering
The Seepage Characteristics Of A Single Well Dewatering From An Unconfined Aquifer Bottom, Li Yang, Wang Wenxue, Xiao Hang, Sun Yi, Wang Yun, Di Mengna
The Seepage Characteristics Of A Single Well Dewatering From An Unconfined Aquifer Bottom, Li Yang, Wang Wenxue, Xiao Hang, Sun Yi, Wang Yun, Di Mengna
Coal Geology & Exploration
Dewatering from an aquifer bottom for drain and depressurization is one common method to ensure safety mining. This method is significantly different from pumping from the ground. In order to study the seepage characteristics of the dewatering hole(well), the seepage characteristics of a single well dewatering from an unconfined aquifer bottom was taken as an example and studied using numerical simulation method. The results show that when lw<lc, the pore water pressure above the dewatering well is greater than zero, which presents the rule of increasing first then decreasing from bottom to top, and the seepage …
Water Yield Analysis Of Underground Drainage Boreholes On The Basis Of Logarithmic Normal Distribution, Ma Lianjing, Zhao Baofeng
Water Yield Analysis Of Underground Drainage Boreholes On The Basis Of Logarithmic Normal Distribution, Ma Lianjing, Zhao Baofeng
Coal Geology & Exploration
In order to analyze the distribution rule of water flow from underground drainage borehole in coal mines, histogram, Q-Q chart and nonparametric tests were used to test the logarithmic normal distribution model for water flow from underground drainage borehole in typical working face, and the nonlinear regression model was fitted. Combined with hydrogeological conditions, the parameters in the model were analyzed. The result shows that water flow from underground drainage boreholes in working face obeys the lognormal distritution. The logarithmic mean and standard deviation of water flow from drainage borehole of typical working face have a positive linear dependence relation …