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.

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

Zonal extraction technology and numerical simulation analysis in open pit coal mine

2012 ◽  
Vol 22 (4) ◽  
pp. 487-491 ◽  
Author(s):  
Yanlong Chen ◽  
Qingxiang Cai ◽  
Tao Shang ◽  
Hongge Peng ◽  
Wei Zhou ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Coal Mine ◽  
Simulation Analysis ◽  
Open Pit ◽  
Extraction Technology

Numerical Simulation of Slope Stability Analysis of Open Pit Coal Mine Based on MIDAS/GTS

2012 ◽  
Vol 256-259 ◽  
pp. 193-197
Author(s):  
Chong Xian Liu ◽  
Yong Tao Gao
Keyword(s):  
Slope Stability ◽  
Coal Mine ◽  
Mining Area ◽  
Slope Instability ◽  
Open Pit ◽  
Shanxi Province ◽  
North Slope ◽  
Mining District ◽  
The North

Based on mining area end slope stability evaluation engineer- ing of Pingshuo East open pit coal mine in Shanxi Province, ac- cording to the status quo of the North Slope of the first mining district of the East open pit coal mine as well as engineering g- eological investigation results, this article selected a represen- tative cross-section of the North Slope,adopted processing fu- nctions of finite element analysis software MIDAS/GTS, and re- spectively analyze slope stability under three conditions of the mining area of the initial excavation,backfilling and disposal,a- nd follow-up excavation.The paper concluded that Initial exca- vation caused slope instability; backfill slope is stable after di- sposal; follow-up excavation has essentially no effect on slope stability. The establishment and analysis are much closer to t- he real situation, objectively reflect the distribution of slope s- tability of the East open pit coal mine, and provide a design for open pit production safety.

scholarly journals Experimental Study on Impermeability Law of Aquiclude Reconstructed by Mudstone of External Dump in Arid Zone

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Li Ma ◽  
Chendong Liu ◽  
Yinli Bi ◽  
Suping Peng ◽  
Kaisheng Jiang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Particle Size ◽  
Coal Mine ◽  
Physical Simulation ◽  
Arid Zone ◽  
Soil Column ◽  
Infiltration Rate ◽  
Quadratic Functions ◽  
Open Pit ◽  
Drop Rate

In order to achieve the goal of ecological restoration, plant irrigation, and water retention in the external dump of open-pit coal mine in the arid desert area, it is proposed to use the mudstone in the stripped material to reconstruct the surface aquiclude and improve the water holding capacity of the topsoil. By taking the Hongshaquan Open-Pit Coal Mine as the study object, the red mudstone of mining level +650 was selected as the topsoil aquiclude material through the geological survey. XRD diffraction experiments are used to determine the composition of red mudstone including kaolinite mineral, quartz, potash feldspar, albite, and illite. The moisture content of the red mudstone is 4.16% as measured by the indoor drying experiment. And the particle size of 0.5 mm, 1 mm, and 2 mm and the thickness of 5 cm, 10 cm, and 20 cm rock samples were selected to conduct the indoor soil column experiment. Three indicators of initial infiltration rate, stable infiltration rate, and average infiltration rate were obtained according to the analysis and calculation of the water column drop rate, wet peak drop rate, and cumulative infiltration rate so that the permeability law and coefficient of each group of tests can be known. The finite element transient analysis theory and numerical simulation method were adopted to verify the results of physical experiments. The research results show that +650 level red mudstone has a strong antiseepage ability, and the smaller the particle size, the better the antiseepage performance. For 0.5 mm and 2 mm particle sizes, as the paving height increases, the water-proof effect is better. The laying height of 1 mm particle size has no obvious influence on the water barrier effect. The physical simulation was confirmed to have the same result trend as the numerical simulation, both of which are quadratic functions with the error within a reasonable range.

scholarly journals Mechanism of Coal Burst and Prevention Practice in Deep Asymmetric Isolated Coal Pillar: A Case Study from YaoQiao Coal Mine

2021 ◽  
Vol 2021 ◽  
pp. 1-19
Author(s):  
Chengchun Xue ◽  
Anye Cao ◽  
Wenhao Guo ◽  
Songwei Wang ◽  
Yaoqi Liu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Coal Mine ◽  
Prevention And Control ◽  
High Stress ◽  
Coal Pillar ◽  
Support Pressure ◽  
Mining District ◽  
Coal Pillars ◽  
And Control ◽  
The Impact

Coal pillar bursts continue to be a severe dynamic hazard. Understanding its mechanism is of paramount importance and crucial in preventing and controlling its occurrence. The extreme roadway deformations from the asymmetric isolated coal pillars in the central mining district of YaoQiao Coal Mine have responded with frequent intense tremors, with risky isolated coal pillar bursts. The theoretical analysis, numerical simulation, and field measurements were done to research the impact of spatial overburden structure and stress distribution characteristics on the isolated coal pillar area, aiming to reveal the mechanism of coal pillar burst leading to the practice of prevention and control in the asymmetric isolated coal pillar area. The study shows that the overburden structure of the asymmetric is an asymmetric “T” structure in the strike-profile, and the stress in the coal pillar is mostly asymmetric “saddle-shaped” distribution, with the peak stress in the east side of the coal pillar, and the coal pillar is a “high stress serrated isolated coal pillar.” Numerical simulation results showed that the support pressure in the isolated coal pillar area on the strike profile was asymmetrically “saddle-shaped” distribution. The peak vertical stress in the coal pillar area continued to rise and gradually shifted to the mining district's deep part. As a result, the response of the roadway sides to the dynamic load disturbance was more pronounced. They developed a coal burst prevention and control program of deep-hole blasting in the roof of asymmetrical isolated coal pillar roof and unloading pressure from coal seam borehole. Monitored data confirmed that the stress concentration was influential in the roadway’s surrounding rock in the asymmetric isolated coal pillar area, circumventing coal pillar burst accidents. The research outcomes reference the prevention and control of coal bursts at isolated working faces of coal pillars under similar conditions.

Numerical Simulation of Slope Stability in the First Mining of Open-Pit Coal Mine

2013 ◽  
Vol 807-809 ◽  
pp. 2371-2377
Author(s):  
Guang Yi Sun ◽  
Xiao Luo
Keyword(s):  
Numerical Simulation ◽  
Steady State ◽  
Slope Stability ◽  
Coal Mine ◽  
Paper Analysis ◽  
Open Pit ◽  
Stress And Strain ◽  
Safety Coefficient ◽  
Mine Slope ◽  
Mining Slope

This paper analysis open-pit coal mine slope stability in the first mining with FLAC3D, reveal the mechanism of slope deformation, through analysis the stress and strain nephogram of model ZK8 of the first mining slope, and calculation safety stability coefficient, finally concluding stope slope of the first mining occur slip as circular form under their own gravity. The safety factor of model ZK8 is more than stope slope safety coefficient 1.20, slope is in steady state, obtained the accurate and reliable analysis results of stability.

Study on the Rockmass Instability of Open-Pit Mine by Block Theory and Numerical Simulation Methods

2013 ◽  
Vol 353-356 ◽  
pp. 1077-1081
Author(s):  
Hai Gang Li ◽  
Zhi Jun Yang ◽  
Tong Lin Han
Keyword(s):  
Numerical Simulation ◽  
Rock Mass ◽  
Finite Difference ◽  
Surrounding Rock ◽  
Open Pit ◽  
Rock Mechanic ◽  
Mining District ◽  
Lagrangian Analysis ◽  
Rock Mass Structure ◽  
Block Theory

On the background of rock masses and field engineering geology of a mine, the feature of rock mechanics and rock mass structure of surrounding rock at mining district are analyzed. Based on the finite difference theory and block theory, FLAC3D program (Fast Lagrangian Analysis for Continuum), rock mechanic and rock mass structure results are used to construct the finite difference mechanical model, which reflected the surrounding rock stability when mining. By the numerical simulation, the mechanical effect is studied by the process of mining and its results can be used to produce some theory and actual basis.

scholarly journals Effect of Coalbed Methane Well Fracturing on Slope Stability of Open-Pit Coal Mine: A Case Study of Shengli East No. 2 Open-Pit Coal Mine

2020 ◽  
Vol 2020 ◽  
pp. 1-16
Author(s):  
Qingzhong Zhu ◽  
Bo Wang ◽  
Xin Zhao ◽  
Chunchun Liu ◽  
Qing Yu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Slope Stability ◽  
Coal Mining ◽  
Dynamic Fracture ◽  
Coal Mine ◽  
Coalbed Methane ◽  
Limit Equilibrium ◽  
Open Pit ◽  
Fracture Width ◽  
Fracture Height

The impact of hydraulic fracture from CBM well fracturing on slope stability of the Shengli East No. 2 open-pit coal mine is analyzed by numerical simulation and limit equilibrium methods. The interference effect of coalbed methane (CBM) well fracturing on slope stability of the open-pit coal mine promotes the coordinated development of CBM, and open-pit coal is discussed before and after coal mining. It shows that nearly horizontal fractures are formed in the coal seam due to CBM well fracturing, of which the dynamic facture length and propping fracture length are 137.2 m and 105.2 m, respectively. Moreover, the dynamic fracture height is 137.2 m and propping fracture height is 130.6 m. At the location of perforation, the dynamic fracture width is 0.873 cm and average propping fracture width is 0.111 cm. The CBM well fracturing barely imposed any effect on slope stability before open-pit coal mining. The maximum vertical displacement at the toe of slope induced by fracturing is 0.293 mm. In situations with and without CBM well fracturing, vertical stress distributions in the toe, top, and interior of slope have no obvious difference. There is some extent of vertical stress increase within the interior of slope, which is merely 0.2 MPa higher than that in the condition of initial in situ stress equilibrium. The presence of hydraulic fractures has little effect on the overall displacement of slope during coal mining; and there is no obvious difference between the slope stability during coal mining and the slope stability impacted by fracturing. According to the results of limit equilibrium method and numerical simulation, the overall slope stability coefficient is 1.5–1.97, which accords with the requirements of the Design Code for Open-Pit Mine of Coal Industry (GB50197-2015). Therefore, more attentions should be paid to the ways of excavation and sloping during coal mining, avoiding slope instability caused by excavation.

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 Concept and Practice of Open-pit Mining Area Restoration and Reuse --- Taking an Open-pit Coal Mining Area in Datong, Shanxi as an Example

2020 ◽  
Vol 145 ◽  
pp. 02014
Author(s):  
Huang Jiayin ◽  
Hu Baoan ◽  
Tan Xiangjun ◽  
Cheng Jin ◽  
Li Long
Keyword(s):  
Coal Mine ◽  
Geographical Location ◽  
Mining Area ◽  
Cultural Tourism ◽  
Open Pit ◽  
Open Pit Mining ◽  
Mining Areas ◽  
Coal Mining Area ◽  
Rural Revitalization ◽  
Mining Coal

The restoration of open-pit mining coal mine areas is imminent, and it is of great significance to put forward a set of reasonable restoration concepts. According to the geographical location and economic conditions of the mining areas, this paper combines multiple restoration concepts and measures such as “fundamental reforestation”, “near-natural restoration”, “introduction of agricultural and forestry industries” and “development of cultural tourism in abandoned land” in a scientific way, the combination has been successfully applied in the restoration and comprehensive utilization project in an open-pit coal mine area in Datong, Shanxi, China. This concept realizes the reuse of abandoned open-pit coal mines and closely follows the national strategy of poverty alleviation and rural revitalization, in pursuit of the national vision of “clear waters and green mountains are mountains of gold and silver.”

Sign in / Sign up

Export Citation Format

Share Document