Study and Entironmental Impact Evaluation on an Expanding Project of Coal Mine

2012 ◽  
Vol 518-523 ◽  
pp. 1278-1281
Author(s):  
Rong Jun Su
Keyword(s):  
Coal Mine ◽  
Prediction Models ◽  
Point Of View ◽  
Ground Subsidence ◽  
Land Occupation ◽  
Surface Movement ◽  
Biomass Loss ◽  
Movement And Deformation ◽  
Regional Landscape ◽  
Technical Features

To asses entironmental feasibility of Expanding and Improving Project on Xihe Coal Mine (EIPXCM) and predict it’s influence on entironment, according to related regulations and technical features of the project, prediction models and parameters of surface movement and deformation were determined. Its influence evaluation was down. The results shows that the largest value of ground subsidence in whole mine field is 1.219 m, and corresponding affected scope of surface movement and deformation is 42673 m2. Then the appraisals of entironmental impact on land sink, soil erosion, land occupation, biomass loss, wild animals and landscape ecology were done. The results indicates that only a little land occupied, there will not be big change on regional landscape situation and the project will affect ecosystem very little. Finally, relieving measures of entironmental influence were proponed. Therefore, on the conditions of taking proponed measures, this project is feasible from the point of view of entironment.

Analysis on Characteristics of Surface Subsidence with Han Jia Wan Coal Mine

2012 ◽  
Vol 524-527 ◽  
pp. 520-524 ◽  
Author(s):  
Xue Yi Yu ◽  
Peng Wang ◽  
Xing Liang Li
Keyword(s):  
Coal Mine ◽  
Scientific Basis ◽  
Surface Subsidence ◽  
Surface Cracks ◽  
Surface Movement ◽  
Working Face ◽  
Shallow Coal Seam ◽  
Movement And Deformation ◽  
Main Factors ◽  
Movement Parameters

Surface subsidence has some peculiarities for the mining of the Han jia wan coal mine. Based on the surface movement observation of 2304 working face in Han jia wan coal mine, mining strata movement parameters are analyzed, the main factors which influence the formation of surface cracks in the gob are proposed and the failure mechanism of surface movement and deformation are studied for the mining of shallow coal seam and thick loose bed. Correlative parameters are presented and scientific basis is established for the coal mining under buildings, rail and water and the leaving of the safety pillar in the future.

Study and Environmental Impact Evaluation on a Coal Separating Plant

2012 ◽  
Vol 482-484 ◽  
pp. 2122-2125 ◽  
Author(s):  
Rong Jun Su
Keyword(s):  
Environmental Impact ◽  
Prediction Models ◽  
Coal Dust ◽  
Water Environment ◽  
Ambient Air ◽  
Point Of View ◽  
Acoustic Environment ◽  
Accidental Discharge ◽  
Environmental Feasibility ◽  
Technical Features

To asses environmental feasibility of Beize coal separating plant and predict it’s influence to ambient, according to government laws, codes and regulations such as 《The Specific Guides to Environmental Impact Assessment》 and technical features of the project, the range, grade, standards, factors and prediction models of influence evaluation were determined. Then predictions and evaluations of ambient air, surface water environment, acoustic environment, solid wastes and environmental risk were undertaken. The results showed that air pollutants was 2.38t/a of smoke dust and 2.60t/a of SO2 and the coal dust discharging concentration was less than 120 mg/m3. There would be 6.0 mg/L and 16.2 mg/L increment on COD and SS respectively in the local river on the occasion of accidental discharge. Noises was 50 dB(A) or less along plant boundary. So the pollutants discharge of this project can meet relative discharge standards on the conditions of carrying out various pollution precaution measures and guaranteeing normal production. Therefore, this project is feasible from the point of view of environment.

scholarly journals Ground Subsidence Evolution from 1000 m Deep Mining: A Case Study in Fengfeng Mining Area

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Yueguan Yan ◽  
Ming Li ◽  
Jibo Liu ◽  
Weitao Yan ◽  
Jinman Zhang ◽  
...  
Keyword(s):  
Eastern China ◽  
Mining Area ◽  
Ground Subsidence ◽  
Small Displacement ◽  
Deep Mining ◽  
Deep Mine ◽  
Surface Movement ◽  
Mining Depth ◽  
Movement And Deformation ◽  
Influence Radius

The mining of coal resources in eastern China has entered the stage of deep mining, and many mines have reached the depth of 1000 meters. Different from shallow and moderate depth mining, the temporal and spatial evolution regulation of surface movement and deformation under deep mining has its particularity. Combining with the geological and mining conditions of Fengfeng mining area, this paper systematically studies the characteristics of surface movement under the condition of shallow, moderate, and near kilometer mining depth. By means of field measurement, InSAR monitoring, we get the subsidence data under different mining depth and get the relevant subsidence parameters by inversion. Through comparative analysis, the special law of subsidence under the mining depth of 1000 meters is obtained. The results show that under the condition of nearly 1000 meters mining depth, the surface movement and deformation have the characteristics of large displacement angle, small displacement deformation value, and large main influence radius. The regulation of small proportion of active period of maximum subsidence point, gentle shape of surface movement basin, and low mining adequacy are obtained. The research results provide technical references for deep mining under buildings, railways, and water bodies and provide basis and reference for scientific mining and safe recovery of coal pillars in kilometer deep mine.

scholarly journals Analysis of Wave Energy Conversion with Dynamic Systems Theory

2019 ◽  
Vol 103 ◽  
pp. 02003
Author(s):  
Sorin Ciortan ◽  
Eugen Rusu
Keyword(s):  
Dynamic System ◽  
Energy Conversion ◽  
Wave Energy ◽  
Prediction Models ◽  
Weather Conditions ◽  
Point Of View ◽  
The Black Sea ◽  
Time Range ◽  
Wave Energy Conversion ◽  
Dynamic System Theory

In wave energy conversion one of the most important steps is building scenarios about long term efficiency, taking into account that several factors are involved. Based on the assumption that actually the weather conditions show important modifications year by year, analyses of wave power evolution during the exploitation time range must rely on both prediction models and on several options for the conversion device. From this point of view, the wave energy conversion process can be considered a dynamic system. The dynamic system theory based methodology approach systems behaviour through relationships between systems components. Comparing to usual scientific approaches, which try to decompose the analyzed system, this methodology offers a view of entire system behaviour The paper presents a method for building scenarios of wave energy conversion, in the nearshore of the Black Sea, based on a model which includes also forecasts of the weather influence.

scholarly journals Prediction of the First Weighting from the Working Face Roof in a Coal Mine Based on a GA-BP Neural Network

2019 ◽  
Vol 9 (19) ◽  
pp. 4159
Author(s):  
Tan ◽  
Yang ◽  
Chang ◽  
Zhao
Keyword(s):  
Neural Network ◽  
Coal Mine ◽  
Bp Neural Network ◽  
Prediction Models ◽  
Initial Pressure ◽  
Mining Area ◽  
Mine Pressure ◽  
Mine Production ◽  
Production Safety ◽  
Matlab Programming

The accidents caused by roof pressure seriously restrict the improvement of mines and threaten production safety. At present, most coal mine pressure forecasting methods still rely on expert experience and engineering analogies. Artificial neural network prediction technology has been widely used in coal mines. This new approach can predict the surface pressure on the roof, which is of great significance in coal mine production safety. In this paper, the mining pressure mechanism of coal seam roofs is summarized and studied, and 60 sets of initial pressure data from multiple working surfaces in the Datong mining area are collected for gray correlation analysis. Finally, 12 parameters are selected as the input parameters of the model. Suitable back propagation (BP) and GA(genetic algorithm)-BP initial roof pressure prediction models are established for the Datong mining area and trained with MATLAB programming. By comparing the training results, we found that the optimized GA-BP model has a larger determination coefficient, smaller error, and greater stability. The research shows that the prediction method based on the GA-BP neural network model is relatively reliable and has broad engineering application prospects as an auxiliary decision-making tool for coal mine production safety.

Study on the Regularity of Surface Movement and Deformation in Long Coal Face with Large Mining Height

2012 ◽  
Vol 594-597 ◽  
pp. 86-91
Author(s):  
Zu Qiang Xiong ◽  
Jun He ◽  
Lei Lei Zhao
Keyword(s):  
Horizontal Displacement ◽  
Mining Area ◽  
Coal Seams ◽  
Coal Face ◽  
Abscission Layer ◽  
Surface Movement ◽  
Face Length ◽  
Large Mining Height ◽  
Movement And Deformation ◽  
Space Range

It is an important way to realize mine intensive production by increasing of the coal face length. During the transformation period of mining methods about thick coal seams, the character parameters of surface movement and deformation will be provided to guarantee scientifically mining of thick coal seams in Jincheng mining area. In this paper, numerical simulation, theoretical analysis and field measurement are used for studying the influence of coal face length on surface movement and deformation in the condition of large height mining. The results show that the separated strata space range extended with the increasing of coal face length and advancing distance, the surface movement and deformation become more violent, the mining influenced range also gradually expands, and the maximum surface subsidence and horizontal displacement increases gradually in form of linear relationship. In the condition of fast mining, the duration of abscission layer reduces, and the surface movement and deformation shows obviously hysteretic and zonal characteristic.

Analysis on Ground Subsidence in Underground Mining

2011 ◽  
Vol 383-390 ◽  
pp. 2201-2205
Author(s):  
Xin Xi Liu ◽  
Xue Zhi Wang
Keyword(s):  
Underground Mining ◽  
Ground Deformation ◽  
Coal Pillar ◽  
Mining Area ◽  
Ground Subsidence ◽  
Recovery Coefficient ◽  
Mining Width ◽  
Movement And Deformation ◽  
Relationship Of ◽  
The Relationship

Analysis on the characters of ground subsidence of Yangjiaping mining area, with same excavation depth and recovery coefficient, the numerical simulations to nonlinear large deformation using finite-difference method(FLAC) are achieved on the different strip extraction schemes that adopted different mining and reservation width. The result indicates that the subsidence values and horizontal deformation increases with the increasing of the strip extraction width on condition of the same recovery rate. Based on probability density function (PDF) method, the relationship of the coal pillar width, the mining width and ground deformation is acquired, which is some useful reference for using the strip extraction method to control the surface movement and deformation.

Application of Neural Network in Surface Movement and Deformation Analysis

2012 ◽  
Vol 524-527 ◽  
pp. 531-534
Author(s):  
Zhong Ping Guo ◽  
Dao Zhi Chen ◽  
Tao Zhang
Keyword(s):  
Neural Network ◽  
Ground Surface ◽  
Deformation Analysis ◽  
Coal Seams ◽  
Surface Movement ◽  
Probability Integral Method ◽  
Rock Movement ◽  
Movement And Deformation ◽  
Mining Scheme ◽  
Selection Of

In order to make a comprehensive and accurate prediction of surface movement and deformation in the thin coal seams mining under buildings, mathematical model of the selection of rock movement parameter is established by the way of artificial neural network; ground surface movement and deformation is predicted and analyzed through probability integral method, mining scheme of the thin coal seams mining under buildings in a coal mine is determined.

Analysis of strata and ground subsidence in fully mechanized solid backfilling mining: a case study of Huayuan coal mine

2016 ◽  
Vol 125 (4) ◽  
pp. 233-241 ◽  
Author(s):  
X. J. Zhu ◽  
G. L. Guo ◽  
J. Wang ◽  
Q. Fang ◽  
T. Chen
Keyword(s):  
Coal Mine ◽  
Ground Subsidence
Sign in / Sign up

Export Citation Format

Share Document