Shaanxi Institute of Geo Environment Monitoring

Fengcheng, China

Shaanxi Institute of Geo Environment Monitoring

Fengcheng, China

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Fan L.-M.,Shaanxi Institute of Geo Environment Monitoring
Meitan Xuebao/Journal of the China Coal Society | Year: 2017

Aim to find methods for aquifers and ecology protection in arid and semi-arid mines, the paper put forth the concept and the scientific connotation of water-preserved mining, and established its basic frame from systematical theory based on coal geology, mining conditions and strata movement characteristics in the Yushen mine area. Water-preserved coal mining applies to in arid and semi-arid coal mining areas. Its objective is to protect aquifer structures and base flow of rivers. Its major research contents include geological and hydrogeological conditions, rock movement control technology, constraint conditions both water and ecology, and key mining technique. Three basic ways, which are to refrain from water flowing fractures by controlling strata movement, to reconstruct aquicludes and remodel aquicludes by grouting, are widely adopted in water-preserved mining. Challenges facing are filling at high cost and negative environmental effects of shallower buried depths of water table in deserts due to land subsidence. Studies on water-preserved coal mining are theory base and evidence for coal mining and water resource protection in arid and semi-arid mines. © 2017, Editorial Office of Journal of China Coal Society. All right reserved.


Yang Z.Y.,Chang'an University | Yang Z.Y.,Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Regions of Ministry of Education | Wang W.K.,Chang'an University | Wang W.K.,Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Regions of Ministry of Education | And 5 more authors.
Hydrogeology Journal | Year: 2016

In arid and semi-arid regions, a close relationship exists between groundwater and supergene eco-environmental issues such as swampiness, soil salinization, desertification, vegetation degradation, reduction of stream base flow, and disappearance of lakes and wetlands. When the maximum allowable withdrawal of groundwater (AWG) is assessed, an ecology-oriented regional groundwater resource assessment (RGRA) method should be used. In this study, a hierarchical assessment index system of the supergene eco-environment was established based on field survey data and analysis of the supergene eco-environment factors influenced by groundwater in the Tuwei River watershed, Shaanxi Province, China. The assessment system comprised 11 indices, including geomorphological type, lithology and structure of the vadose zone, depth of the water table (DWT), total dissolved solids content of groundwater, etc. Weights for all indices were calculated using an analytical hierarchy process. Then, the current eco-environmental conditions were assessed using fuzzy comprehensive evaluation (FCE). Under the imposed constraints, and using both the assessment results on the current eco-environment situation and the ecological constraint of DWT (1.5–5.0 m), the maximum AWG (0.408 × 108 m3/a or 24.29 % of the river base flow) was determined. This was achieved by combining the groundwater resource assessment with the supergene eco-environmental assessment based on FCE. If the maximum AWG is exceeded in a watershed, the eco-environment will gradually deteriorate and produce negative environmental effects. The ecology-oriented maximum AWG can be determined by the ecology-oriented RGRA method, and thus sustainable groundwater use in similar watersheds in other arid and semi-arid regions can be achieved. © 2016 Springer-Verlag Berlin Heidelberg


Fan L.-M.,Shaanxi Geological Survey | Fan L.-M.,Shaanxi Institute of Geo Environment Monitoring | Ma X.-D.,Chang'an University | Ji R.-J.,China University of Mining and Technology
Meitan Xuebao/Journal of the China Coal Society | Year: 2015

It is the unique geological environment conditions in northern Ordos Basin Jurassic coalfield that the issue “ water-preserved coal mining” is presented. After years of research, there have been some significant progresses in basic research and engineering practice. This paper summarized the latest achievements in the research of water-preserved coal mining. In the basic research phase: identified spatial distribution relation between coal bed with aquifers and impermeable layer; established the structure type of coal bed roof; divided the coal mining area into different partitions to protect aquifer; and specified the mining methods in different regions to protect groundwater. In the engineering practice phase: five kinds of aquifer-structure-preserved mining methods be employed to protect roof aquifer structure, including cut-and-fill mining, strip mining, slice mining, short-wall continuous mechanical mining and fast marching mining; reinforced bottom plate by grouting to protect Karst confined water in Weibei mining area; and transferred swallet into mined-out area to improve the utilization. ©, 2015, Meitan Xuebao/Journal of the China Coal Society. All right reserved.


Tao H.,Shaanxi Institute of Geo Environment Monitoring | Ning K.-B.,Geological Society of Shaanxi Province | Tao F.-P.,Shaanxi Institute of Geo Environment Monitoring | Yang Z.-Y.,Chang'an University | And 4 more authors.
Meitan Xuebao/Journal of the China Coal Society | Year: 2016

Coal mining has great influence on the groundwater dynamic in the blown-sand region of the northern Shaanxi Province.On the basis of long-term monitoring data of groundwater table,the change characteristics of Salawusu group unconfined groundwater table regional dynamic from time and space in Yuyang district of Yulin City were analyzed comprehensively.Dynamic types of shallow groundwater table in the study area were classified into three types by Interactive Self-Organizing Data Analysis Technique (ISODATA):the strong fluctuation area of groundwater table (Type I),the medium fluctuation area of groundwater table (Type II) and the weak fluctuation area of groundwater table (Type III).The change laws and main influence factors of groundwater table in different dynamic type areas were analyzed and the correlation analysis between groundwater table dynamic and coal mining and atmospheric precipitation was carried out.The conclusion is that the groundwater table dynamic in Type I area,which presents a stronger fluctuation,is mainly affected by atmospheric precipitation,while the groundwater table dynamic in Type II and III is weaker because of the comprehensive influence of atmospheric precipitation and coal mining.Under the present mining conditions,the main influence factor of regional groundwater dynamic in the study area is atmospheric precipitation,followed by coal mining. © 2016, Editorial Office of Journal of China Coal Society. All right reserved.


Fan L.-M.,Shaanxi Institute of Geo Environment Monitoring | Ma X.-D.,Chang'an University | Jiang H.,Xi'an University of Science and Technology | Cheng S.,Xi'an University of Science and Technology
Meitan Xuebao/Journal of the China Coal Society | Year: 2016

This paper studied the risk evaluation methods of water and sand inrush from coal roof based on the dimensionless multi-factor information fusion technique. Taking Yushenfu coal mine as example, based on the analysis of water inrush mechanism, the paper identified four key factors affecting the water inrush and sand inrush from the roof, which include sand thickness, water-richness of aquifer, effective thickness of aquiclude layer and mining space. Each factor was dealt with dimensionless quantity according to the structural and hydro-geological conditions, and the weights of each factor was determined by entropy weight method, synchronously. Then, the dimensionless multi-factor information fusion model for the risk evaluation Yushenfu coal mine was established on the basis of the ArcGIS. Using the model, the authors got the water inrush and sand inrush risk zoning map in Yushenfu coal mine. The result shows that it is reliable to apply the model on the evaluation and partition of the water inrush and sand inrush from the coal roof in Yushenfu coal mine. ©, 2016, China Coal Society. All right reserved.


Ma X.-D.,Chang'an University | Fan L.-M.,Shaanxi Institute of Geo Environment Monitoring | Zhang X.-T.,Shaanxi Institute of Geo Environment Monitoring | Zhang Y.-F.,Northwest Institute for Nonferrous Metal Research | And 2 more authors.
Meitan Xuebao/Journal of the China Coal Society | Year: 2016

Human activities and natural factors are two kinds of driving force in land desertification. The present study attempts to identify their relative roles in the land desertification of Yushenfu coal mining area. The study utilized the three stages TM remote sensing image data of 1989, 2002 and 2011 on 1∶50 000 scale for land desertification mapping and its dynamic change analysis. Combined with principal component analysis (PCA), the relative roles of human activities and natural factors in land desertification were identified in the study area. The results are: (1) Based on the remote sensing image data, the expressions of normalized difference vegetation index (NDVI) and Albedo can be derived to rank desertification in the study area. (2) The spatial distribution of land desertification presents a clear zonation pattern in mining area, the desertification in the Western mining area is heavier than that of the Eastern part. (3) Land desertification area decreases 36.7% and 27.7% during the periods 1989-2002 and 2002-2011 respectively, which makes the desertification show a reversal trend. (4) The spatial distribution of land desertification is very different from West to East. The very severe and severe desertification areas decrease over the time in the Western mining area obviously, while there is a trend of rehabilitation firstly and then improvement in the East. (5) Coal mining activities and climate change account for 62.16% and 14.18% of the total variance, suggesting the main driving force of land desertification is human activities. The results show that water protected coal mine, grazing prohibition and tree planting are the only way to rehabilitate the land degradation in Yushenfu coal mining area. © 2016, Editorial Office of Journal of China Coal Society. All right reserved.


Ji R.-J.,China University of Mining and Technology | Peng S.-P.,China University of Mining and Technology | Fan L.-M.,Shaanxi Institute of Geo Environment Monitoring | Zhao Y.-N.,Water Resources University | Li C.,Shaanxi Institute of Geo Environment Monitoring
Meitan Xuebao/Journal of the China Coal Society | Year: 2015

Authors took the middle and lower reaches of Kuye River as an example, summarized the circulation patterns of groundwater at Shenfu mine area by the field investigation and analysis of hydrochemical characteristics: Quaternary phreatic and Jurassic burned metamorphic rocks phreatic are mainly controlled by topography. The clastic rock aquifer type of Yan'an formation is divided into five sections, and is mainly controlled by dip direction, along fluvial facies and flows from east to west. Also the paper describes how the mining activities affect the groundwater: Shallow coal mining destroys the water resisting property of clay aquifuge underlying the phreatic water aquifer, which results in the reduction of water basin area and spring discharge. "Headward erosion" caused by mining activities captures the groundwater from its adjacent hydrogeological unit. The mine water recharge increases and the evaporation decreases. The deep coal-seam mining further damages the clay aquifuge, which leads to the disappearance of unconfined aquifer. Surface runoff transfers into groundwater and groundwater flows along the No. 5-2 coal-seam floor. ©, 2015, China Coal Society. All right reserved.


Ma X.-D.,Chang'an University | Fan L.-M.,Shaanxi Institute of Geo Environment Monitoring | Zhang X.-T.,Shaanxi Institute of Geo Environment Monitoring | Zhang H.-Q.,Shaanxi Institute of Geo Environment Monitoring | And 2 more authors.
Meitan Xuebao/Journal of the China Coal Society | Year: 2015

The distribution and changes of surface water and wetlands at Yushenfu mining area were investigated by using the data sources from three periods Spot remote sensing image, i. e. 1990, 2001 and 2011. The results show that: Surface water area was shrunk in these period. The rates of shrink from 1990 to 2001 and from 2001 to 2011 were 17.73% and 22.39%, respectively; Wetland area extended 65.91% from 1990 to 2001, however, decreased by 50.92% from 2001 to 2011; Surfacewater area changed to wetland or other type of land, which make wetland area maintained unchanged in the past 20 years; It was main driving forces that climate change, coal mining, ecological environment protection and water source construction driven surfacewater and wetland area evolution; The role and order of each driving force factors for surface water and wetland evolution were determined by the fuzzy analytical hierarchy approach, the contributions of the coal mining, climate change, reservoir construction and recovery of vegetation was 0.375, 0.292, 0.208 and 0.125, respectively; Coal mining with water protection, groundwater extraction reduced and high water consumption vegetation disappeared can be used to protect the water and wetlands. ©, 2015, China Coal Society. All right reserved.

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