Groundwater Numerical Simulation in Cool Water Well Coal Mine

2011 ◽  
Vol 130-134 ◽  
pp. 1596-1599
Author(s):  
Yu Jie Liu ◽  
Guo Dong Liu ◽  
Yi He ◽  
Zhong Quan Nie
Keyword(s):  
Numerical Simulation ◽  
Coal Mine ◽  
Groundwater Resources ◽  
Mining Area ◽  
Practical Significance ◽  
Visual Modflow ◽  
Cool Water ◽  
Water Wells ◽  
Groundwater Systems ◽  
Development And Utilization

Coal mining had destructed and polluted precious groundwater resources of Cool water Wells coal mine. To more accurately assess the groundwater resources and forecast coal mine groundwater systems status and change trend under state of development and utilization is the foundation work of mining area environment protection and treatment. The paper established the groundwater numerical simulation model in the study area using Visual MODFLOW software, calculated and evaluated the groundwater resources of study area by identification and examination.There are important practical significance to protection preciou water resource of mining area.

scholarly journals Spatiotemporal Variation Characteristics of Groundwater Quality in A Semi-Arid Steppe Area in Northwest China

2021 ◽  
Vol 20 (4) ◽  
Author(s):  
Quansheng Li ◽  
Kai Zhang ◽  
Yingming Yang ◽  
Shan Chong ◽  
Wenfeng Du ◽  
...  
Keyword(s):  
Dissolved Oxygen ◽  
Coal Mine ◽  
Ph Value ◽  
Groundwater Resources ◽  
Vertical Direction ◽  
Mining Area ◽  
Open Pit ◽  
Temporal And Spatial Distribution ◽  
Pastoral Area ◽  
Semi Arid

In this paper, the open-pit coal mine in semi-arid grassland was taken as the research object. The water samples of the open-pit coal mine and its surrounding areas were collected and the hydrochemical parameters were detected. The temporal and spatial distribution characteristics of the parameters such as pH, electrical conductivity, and dissolved oxygen in the groundwater were studied. The results showed that the groundwater in the study area was alkaline and brackish water. Climate factors might have a certain impact on the pH, conductivity, and dissolved oxygen of groundwater. The pH value of groundwater in the mining area was higher than that in the surrounding pastoral area, while the conductivity value of the mining area was between the pastoral area in the west and the Xilin river area in the east. The parameters of pH, conductivity and total dissolved solids of the four monitoring wells around the mining area showed a slow change or stable phenomenon in the vertical direction with the increase of groundwater depth. This study is of great significance to understand the characteristics of groundwater chemistry in mining areas and the rational development and utilization of groundwater resources.

Application of Numerical Simulation in the Analysis of Water Supply Stability of Power Plant

2014 ◽  
Vol 955-959 ◽  
pp. 3442-3447 ◽  
Author(s):  
You Ping Zou ◽  
Lei Li
Keyword(s):  
Numerical Simulation ◽  
Power Plant ◽  
Water Supply ◽  
Coal Mine ◽  
Large Diameter ◽  
Simulation Software ◽  
Water Inflow ◽  
Plant Water ◽  
Visual Modflow ◽  
Hydrogeological Conditions

Currently, the mine water inflow is often forecasted by using the large diameter well method, but under complicated hydrogeological conditions where Dupuit well flow formula is not suitable, the said method is not applicable. The paper takes an example of the water inflow forecast of Chaokewula Coal Mine and discusses the solution of adopting the numerical simulation software Visual Modflow: the simulation scope is defined by analyzing the hydrogeological conditions of Chaokewula Coal Mine to set a mathematical model that fits the actual situation. The model can be identified and verified based on the set model boundary conditions, model spatial discretization, initial conditions and simulation period. Forecast the water inflow of each working face in 30 years by using the underground water numerical simulation software Visual MODFLOW so as to provide a basis for the stability estimation of the mines power plant water supply. Keywords: Numerical Simulation, Water Inflow, Power Plant Water Supply

Based on the Visual Modflow Surge Water Numerical Simulation Study

2012 ◽  
Vol 542-543 ◽  
pp. 1384-1389
Author(s):  
Li Wang ◽  
Ye Liu
Keyword(s):  
Numerical Simulation ◽  
Coal Mine ◽  
Permeability Coefficient ◽  
Open Pit ◽  
Mining District ◽  
Visual Modflow ◽  
Mining Areas ◽  
Drainage Patterns ◽  
Multiple Regression Method ◽  
Numerical Calculation Method

The detailed analysis in shengli coalfield, two East open-pit coal mine geological ， hydro-geological characteristics and groundwater recharge, Runoff, drainage patterns. And on the analysis results of this analysis are mining areas of conceptual models of hydrogeology, numerical calculation method based on Visual Modflow first mining district 4 coal mine water water-bearing rock group. This article by multiple regression method using logging parameter estimation of permeability coefficient, solved in numerical simulation used in hydrological study on permeability coefficient of hole to determine does not meet the need of traditional issues.

scholarly journals Research on heating technology of regenerative oxidation used low concentration CBM in small coal mine

2021 ◽  
Vol 267 ◽  
pp. 02070
Author(s):  
Jian-Jun Wang
Keyword(s):  
Coal Mine ◽  
Mining Area ◽  
Economic Benefits ◽  
Shaanxi Province ◽  
Practical Significance ◽  
Utilization Rate ◽  
Low Concentration ◽  
Blast Stove ◽  
Hot Blast ◽  
Heating Technology

Aiming at the problems such as low CBM utilization rate caused by low concentration CBM with methane content less than 8% extracted from a small coal mine in Hancheng mining area, Shaanxi Province, and serious environmental pollution caused by coal-fired hot blast stove for heating, the heat storage and oxidation heating technology of ultra-low concentration gas in small coal mine was studied by combining field investigation and heat balance calculation, and ultra-low concentration gas regenerative oxidation was obtained through thermal oxidation technology scheme. This technology replaces the coal-fired hot blast stove, realizes “coal and CBM mining and sharing” in the coal mine, and constructs a virtuous cycle development of “promoting drainage by using and promoting safety by drainage”. The research shows that: the scheme improves the utilization rate of CBM in the mining area, cancels the consumption of coal combustion, and can use 2.59 million Nm3 of pure CBM every year, generating 1.95 million yuan of economic benefits. And the emissions reduction of CO2 equivalent is 36000 tons. The benefits of safety, economy and environmental protection are remarkable. This technology is especially suitable for the utilization of ultra-low concentration CBM whose concentration is less than 8%, which has practical significance to improve the CBM utilization rate and promote the realization of the goal of “zero emission”.

scholarly journals Experimental study on performance of high purity nitrogen supply system in liquefaction unit of low concentration coalbed methane

2021 ◽  
Vol 267 ◽  
pp. 02076
Author(s):  
Xiao-liang Jia
Keyword(s):  
Coal Mine ◽  
Coalbed Methane ◽  
Mining Area ◽  
Economic Benefits ◽  
Shaanxi Province ◽  
Practical Significance ◽  
Utilization Rate ◽  
Low Concentration ◽  
Blast Stove ◽  
Hot Blast

Aiming at the problems such as low CBM utilization rate caused by low concentration CBM with methane content less than 8% extracted from a small coal mine in Hancheng mining area, Shaanxi Province, and serious environmental pollution caused by coal-fired hot blast stove for heating, the heat storage and oxidation heating technology of ultra-low concentration gas in small coal mine was studied by combining field investigation and heat balance calculation. This technology replaces the coal-fired hot blast stove, realizes “coal and CBM mining and sharing” in the coal mine, and constructs a virtuous cycle development of “promoting drainage by using and promoting safety by drainage”. The research shows that: the scheme improves the utilization rate of CBM in the mining area, cancels the consumption of coal combustion, and can use 2.59 million Nm3 of pure CBM every year, generating 1.95 million yuan of economic benefits. And the emissions reduction of CO2 equivalent is 36000 tons. The benefits of safety, economy and environmental protection are remarkable. This technology is especially suitable for the utilization of ultra-low concentration CBM whose concentration is less than 8%, which has practical significance to improve the CBM utilization rate and promote the realization of the goal of “zero emission”.

Effect Analysis of Nitrogen Injection on the Variation of “Oxidation Zone” in Coal Mine Gob Based on Numerical Simulation

2016 ◽  
Vol 9 (1) ◽  
pp. 47-54
Author(s):  
Jing Shen ◽  
Mingran Chang
Keyword(s):  
Numerical Simulation ◽  
Coal Mine ◽  
Heat Dissipation ◽  
Spontaneous Combustion ◽  
Oxidation Zone ◽  
Effect Analysis ◽  
Mine Fire ◽  
Nitrogen Injection ◽  
The Difference ◽  
Residual Coal

One of the main reasons for coal mine fire is spontaneous combustion of residual coal in gob. As the difference of compaction degree of coal and rock, the underground gob can be considered as a porous medium and divided into “three zones” in accordance with the criteria. The “three zones” are “heat dissipation zone”, “oxidation zone” and “choking zone”, respectively. Temperature programming experiments are taken and numerical simulation with obtained experimental data is utilized to analyze the distribution of “three zones” in this paper. Different width and depth of “oxidation zone” are obtained when the inlet air velocity is changed. As the nitrogen injection has inhibition effect on spontaneous combustion of residual coal in gob, nitrogen is injected into the gob. The widths of “oxidation zone” are compared before and after nitrogen injection. And ultimately the optimum location and volume of nitrogen injection are found out.

scholarly journals Evaluation of Climate Change Impact on Groundwater Recharge in Groundwater Regions in Taiwan

Water ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1153
Author(s):  
Shih-Jung Wang ◽  
Cheng-Haw Lee ◽  
Chen-Feng Yeh ◽  
Yong Fern Choo ◽  
Hung-Wei Tseng
Keyword(s):  
Climate Change ◽  
Groundwater Recharge ◽  
Climate Change Impact ◽  
Groundwater Resources ◽  
Regression Equations ◽  
Impact Of Climate Change ◽  
Groundwater Systems ◽  
Change Impact ◽  
The Impact ◽  
Assessment Results

Climate change can directly or indirectly influence groundwater resources. The mechanisms of this influence are complex and not easily quantified. Understanding the effect of climate change on groundwater systems can help governments adopt suitable strategies for water resources. The baseflow concept can be used to relate climate conditions to groundwater systems for assessing the climate change impact on groundwater resources. This study applies the stable baseflow concept to the estimation of the groundwater recharge in ten groundwater regions in Taiwan, under historical and climate scenario conditions. The recharge rates at the main river gauge stations in the groundwater regions were assessed using historical data. Regression equations between rainfall and groundwater recharge quantities were developed for the ten groundwater regions. The assessment results can be used for recharge evaluation in Taiwan. The climate change estimation results show that climate change would increase groundwater recharge by 32.6% or decrease it by 28.9% on average under the climate scenarios, with respect to the baseline quantity in Taiwan. The impact of climate change on groundwater systems may be positive. This study proposes a method for assessing the impact of climate change on groundwater systems. The assessment results provide important information for strategy development in groundwater resources management.

Reasonable Entry Layout of Lower Seam in Multi-Seam Mining Based on Numerical Simulation

2013 ◽  
Vol 295-298 ◽  
pp. 2980-2984
Author(s):  
Xiang Qian Wang ◽  
Da Fa Yin ◽  
Zhao Ning Gao ◽  
Qi Feng Zhao
Keyword(s):  
Numerical Simulation ◽  
Stress Distribution ◽  
Coal Seam ◽  
Coal Mine ◽  
Abutment Pressure ◽  
Surrounding Rock ◽  
Geological Conditions ◽  
Seam Mining

Based on the geological conditions of 6# coal seam and 8# coal seam in Xieqiao Coal Mine, to determine reasonable entry layout of lower seam in multi-seam mining, alternate internal entry layout, alternate exterior entry layout and overlapping entry layout were put forward and simulated by FLAC3D. Then stress distribution and displacement characteristics of surrounding rock were analyzed in the three ways of entry layout, leading to the conclusion that alternate internal entry layout is a better choice for multi-seam mining, for which makes the entry located in stress reduce zone and reduces the influence of abutment pressure of upper coal seam mining to a certain extent,. And the mining practice of Xieqiao Coal Mine tested the results, which will offer a beneficial reference for entry layout with similar geological conditions in multi-seam mining.

Sign in / Sign up

Export Citation Format

Share Document