scholarly journals Pumping Test to Determine Hydrogeological Parameters of Coal Seam Roof Aquifer

2019 ◽  
Vol 300 ◽  
pp. 022100
Author(s):  
Chen Shi
Keyword(s):  
Coal Seam ◽  
Pumping Test ◽  
Hydrogeological Parameters

Numerical Simulation of Seepage Field in Aquifer under the Coal Seam

2014 ◽  
Vol 955-959 ◽  
pp. 3120-3124
Author(s):  
Kai Bian ◽  
Shi Lei Chen ◽  
Xue Yuan Li ◽  
Ying Wang Zhao
Keyword(s):  
Numerical Simulation ◽  
Mathematical Model ◽  
Coal Seam ◽  
Three Dimensional ◽  
Seepage Field ◽  
Limestone Aquifer ◽  
Flow Models ◽  
Hydrogeological Parameters ◽  
Simulation Results ◽  
Technical Basis

In order to figure out seepage field in aquifer under the coal seam, the geology and hydrogeology conditions systematically of study area were analyzed, hydrogeological conceptual model was generalized, mathematical model was built, seepage field of the Taiyuan limestone aquifer was simulated with software Feflow. Simulation results show that hydrogeological parameters of Taiyuan limestone aquifer change greatly in different partitions. The model also indicates the heterogeneity of karst fissure of Taiyuan limestone aquifer. The drainage quantity is from the Ordovician limestone aquifer besides supplying from runoff of upstream and capture excretion of downstream. The research is an attempt to simulate the seepage field in aquifer under coal seam, to some extent, it also provides a technical basis for safe coal mining and as a reference for simulation constructions of three-dimensional groundwater flow models in similar coal mines.

Research on Application of Deep Foundation Pit Decompression Dewatering Technology and Impact on Surrounding Environment

2013 ◽  
Vol 671-674 ◽  
pp. 101-104
Author(s):  
Dong Dong Zhang ◽  
Jun Wen Ding ◽  
Rong Biao Wang
Keyword(s):  
Engineering Application ◽  
Pumping Test ◽  
Rail Transit ◽  
Deep Foundation ◽  
Foundation Pit ◽  
Deep Foundation Pit ◽  
Hydrogeological Parameters ◽  
Surrounding Environment ◽  
Practical Engineering ◽  
Research On Application

The studies application of deep foundation pit decompression technology focusing on special engineering geological and hydrogeological conditions. Taking foundation pit dewatering of certain rail transit station as an example, designs deep foundation pit decompression precipitation technology scheme with hydrogeological parameters obtained through pumping test, and assesses and monitors its impacts on surrounding environment according to measured data on project site, which has achieved good results in practical engineering application and provides foundation for construction of rail transit lines.

Numerical Simulation Study on Three-Dimensional Seepage Field of Deep Excavation Dewatering in Thick Aquifer

2013 ◽  
Vol 353-356 ◽  
pp. 1305-1309
Author(s):  
Yan Jun Liu ◽  
Li Zhen Shen
Keyword(s):  
Numerical Simulation ◽  
Simulation Study ◽  
Three Dimensional ◽  
Pumping Test ◽  
Calculation Model ◽  
Test Results ◽  
Deep Excavation ◽  
Test Procedures ◽  
Hydrogeological Parameters ◽  
Geological Conditions

This article describes the pumping test procedures and test results of the subway project 30m deep excavation dewatering in thick aquifer. A groundwater three-dimensional seepage numerical calculation model is established. We use the model to calculate and compare the calculated results and the actual results, obtain hydrogeological parameters by inversion. Further, we have a numerical simulation study on deep excavation dewatering with the hydrogeological parameters, the Simulation results and excavation pre-dewatering test results are consistent. Test results show that the model can reflect the deep excavation dewatering process with complex geological conditions.

Determination of Hydrogeological Parameters of Aquifer Using the Air Compressor Pumping

2013 ◽  
Vol 448-453 ◽  
pp. 3989-3992
Author(s):  
Xue Jiang ◽  
Xiu Juan Liang ◽  
Chang Lai Xiao ◽  
Chuan Du ◽  
Zhong Kai Wang
Keyword(s):  
Hydraulic Conductivity ◽  
Water Level ◽  
Oil Shale ◽  
Pumping Test ◽  
Comprehensive Analysis ◽  
Graphic Method ◽  
Air Compressor ◽  
Hydrogeological Parameters

When the buried depth of water level is very large, the air compressor is used in pumping test. In the limited conditions, the value of the water level was not measured, but the recovery value of water level could be measured. In this case, the sp value of the water level drawdown was not able to be measured accurately when the pumping test stopped. So the hydraulic conductivity of aquifer could only be determined according to the linear graphic method of the water level recovery test. However, water level recovery characteristics of each period were not the same, and the raising rate of water level were not equal. Thus, there was a deviation when the hydraulic conductivity was solved with the linear graphic method. According to the existing data, the thesis combined the water level recovery fitting of the entire curve fitting with Dupuit formula of artesian well, determining the sp value and hydrogeological parameters of aquifer. After comprehensive analysis, the parameters obtained are more reasonable, which can provide a good reference for in-situ mining of oil shale in this area.

The Development and Application of Slug Test in Hydrogeology

2012 ◽  
Vol 268-270 ◽  
pp. 831-834
Author(s):  
Xiao Qiong Deng ◽  
Ji Dong Su
Keyword(s):  
Field Tests ◽  
Field Testing ◽  
Pumping Test ◽  
Underground Water ◽  
Theoretic Model ◽  
High Permeability ◽  
Slug Test ◽  
Testing Method ◽  
Hydrogeological Parameters ◽  
Underground Water Level

The slug test is a field-testing method to evaluate hydrogeological parameters by recording the instantaneous change of the underground water level. Basing on abroad development of slug test, this paper tried to measure some parameters of aquifer with middle and high permeability using high accuracy testing. According to field tests and existing pumping data, discussed difference of several theoretic model, analyzed and computed the hydrogeological parameters of a certain spot in Chang Chun, China by classical Cooper Model. At last, comparing with pumping test, the accuracy of the test was verified, which supplied the theory foundation for its application and generalization.

scholarly journals Parameter Identification by High-Resolution Inverse Numerical Model Based on LBM/CMA-ES: Application to Chalk Aquifer (North of France)

Water ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1574
Author(s):  
Lahcen Zouhri ◽  
Sami Kaidi ◽  
Hassan Smaoui
Keyword(s):  
High Resolution ◽  
Optimization Algorithm ◽  
Decision Support Tool ◽  
Integrated Water Resources Management ◽  
Pumping Test ◽  
Heterogeneous Distribution ◽  
Support Tool ◽  
Integrated Optimization ◽  
Hydrogeological Parameters ◽  
Magnetic Resonance Sounding

The present paper proposes the numerical solution of an inverse problem in groundwater flow (Darcy’s equation). This solution was achieved by combining a high-resolution new code HYSFLO-LBM (Hydrodynamic of Subsurface Flow by Lattice Boltzmann Method), based on LBM, to solve the direct problem, and the metaheuristic optimization algorithm CMA-ES ES (Covariance Matrix Adaptation-Evolution Strategy) to solve the optimization step. The integrated optimization algorithm which resulted from this combination, HYSFLO-LBM/CMA-ES, was applied to the hydrogeological experimental site of Beauvais (Northern France), instrumented by a set of sensors distributed over 20 hydrogeological wells. Hydrogeological parameters measured by the sensors are necessary to understand the aquifer functioning and to serve as input data for the identification of the transmissivity field by the HYSFLO-LBM/CMA-ES code. Results demonstrated an excellent concordance between the integrated optimization algorithm and hydrogeological applied methods (pumping test and magnetic resonance sounding). The spatial distribution of the transmissivity and hydraulic conductivity are related to the heterogeneous distribution of aquifer formations. The LBM and CMA-ES were chosen for their proven excellent performance and lesser cost, in terms of both money and time, unlike the geophysical survey and pumping test. The model can be used and developed as a decision support tool for integrated water resources management in the region.

scholarly journals METHODS OF THE DETERMINATION OF THE HYDROGEOLOGICAL PARAMETERS ON THE RESULTS OF THE EXPERIMENTAL CONSTANT-RATE PUMPING TESTS FROM THE LAYERED AQUIFERS WITH OVERFLOW

2018 ◽  
pp. 50-58
Author(s):  
M. M. Burakov
Keyword(s):  
Experimental Data ◽  
Pumping Test ◽  
Piezometric Level ◽  
Pumping Tests ◽  
Hydrogeological Parameters ◽  
Flow Parameters ◽  
Initial Stage ◽  
Constant Rate ◽  
Volumetric Characteristics

The methodical aspects of the processing and interpreting the results of the experimental filtration tests of the layered strata by the constant-rate pumping tests have been developed. Determination of the filtration and volumetric characteristics of the tested pressure aquifer has been proposed on the basis of the author's method based on the results of tracking the drawdown of the piezometric level of the groundwater in the wells of the experimental cluster at the initial stage of the pumping. Methods for interpreting the experimental data of the second and third stages of the constant-rate pumping test for the calculation of the flow parameters have been proposed.

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