scholarly journals Prediction of the Water-Bearing Capacity of Coal Strata by Using the Macro and Micro Pore Structure Parameters of Aquifers

Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4865
Author(s):  
Longqing Shi ◽  
Tianhao Liu ◽  
Xiaoyang Zhang ◽  
Dongjing Xu ◽  
Weifu Gao
Keyword(s):  
Bearing Capacity ◽  
Coal Mining ◽  
Groundwater Resources ◽  
Mining Area ◽  
Ecological Environment ◽  
Weighting Method ◽  
Pore Connectivity ◽  
Research Results ◽  
Micro Level ◽  
Bedrock Aquifers

Accurate prediction of the water-bearing capacity of aquifers is crucial for protecting the surface ecological environment and ensuring safety during coal mining. In this study, a macro–micro combination was used to investigate the water-bearing capacity of bedrock aquifers. At the micro-level, the micro pore parameters of various sandstones were determined through cast sheeting. At the macro-level, the porosity and water absorption rate of various sandstones were determined experimentally. After that, a new index weighting method was proposed to comprehensively evaluate the water-bearing capacity index of sandstone. According to this method, the water-bearing capacity of aquifers in the Guojiahe coalmine were evaluated. The research results revealed that the water-bearing capacity of sandstone was mainly related to its pore connectivity, and the water-bearing capacity of sandstone in the Luo’he and Zhi’luo formation was considerably greater than that in the Yan’an formation. The water bearing capacity of strata in the eastern part of the mining area is lower than that in the western part of the mining area. The research results can provide considerable money savings for coal mining and protect the ecological environment and groundwater resources in the region.

Chongqing Mine Ecological Restoration and Management Research

2013 ◽  
Vol 864-867 ◽  
pp. 1307-1310
Author(s):  
Ya Jun Zang
Keyword(s):  
Coal Mining ◽  
Ecological Restoration ◽  
Land Reclamation ◽  
Mining Area ◽  
Control Measures ◽  
Management Research ◽  
Paper Briefly ◽  
Research Results ◽  
Geological Disasters ◽  
Ecological Reconstruction

This paper briefly introduces the importance of the process of coal mining and mining later land reclamation and ecological restoration and the characteristics of the land ecological reconstruction of mining area. According to the research results of mine disaster in Chongqing area and the existing environment prevention and harnessing measures, make division of geological disasters, and put forward the corresponding control measures.

Ecological Environment Evaluation of Coal Mining Area Based on Cloud Model

2012 ◽  
Vol 433-440 ◽  
pp. 1372-1376
Author(s):  
Dan Li ◽  
Da Peng Fan ◽  
Chun You Dong
Keyword(s):  
Coal Mining ◽  
Cloud Model ◽  
Mining Area ◽  
New Method ◽  
Ecological Environment ◽  
Coal Mining Area

In order to solve the universal uncertainty in ecological environment evaluation of coal mining area, the cloud model is proposed. Theory of cloud model is introduced; a new method of coal mineral area ecological environment evaluation based on cloud model is presented and its effectiveness is tested by example. Testified by the experiment, results of evaluation are intuitionist with more details, and approach to the fact better.

Influence Analysis of Coal Mining on the Ecological Environment

2014 ◽  
Vol 962-965 ◽  
pp. 45-50 ◽  
Author(s):  
Li Fang Guo ◽  
Hai Feng Hu
Keyword(s):  
Coal Mining ◽  
Survey Data ◽  
Field Survey ◽  
Control Measures ◽  
Mining Subsidence ◽  
Ecological Environment ◽  
Land Resources ◽  
Environment Protection ◽  
Research Results ◽  
Ecologic Environment

Based on the existing research results and field survey data, this paper analyses and evaluates the rule of land deterioration and ecological environment problems caused by mining subsidence. Besides, the author puts forward the corresponding control measures for the effective exploitation of underground resources, land resources and ecologic environment protection.

scholarly journals Impact of coal mining on groundwater of Luohe Formation in Binchang mining area

2020 ◽  
Author(s):  
Kui Sun ◽  
Limin Fan ◽  
Yucheng Xia ◽  
Cheng Li ◽  
Jianping Chen ◽  
...  
Keyword(s):  
Coal Mining ◽  
Groundwater Level ◽  
Water Conservation ◽  
Underground Mining ◽  
Groundwater Resources ◽  
Vertical Direction ◽  
Mining Area ◽  
Aquifer System ◽  
Groundwater Levels ◽  
Spring Flow

Abstract Groundwater of Luohe Formation is the main water source for industrial and agricultural and residential use in Binchang mining area, which is one of the key elements to water conservation coal mining. However, few studies are available to document the enrichment characteristics and influence of underground coal mining on groundwater for the Luohe Formation. This study evaluates the changes of groundwater levels and spring flow caused by mining activities to explore the influence mechanism of coal mining on groundwater by comparatively analysing existing mining data and survey data combined with a series of mapping methods. The results show that the aquifer of Luohe Formation are gradually thinning south-eastwards, disappeared at the mining boundary. In the vertical direction, the lithological structure is distinct, due to alternative sedimentation of meandering river facies and braided river facies. According to the yielding property, the aquifer is divided into three sections, namely, strong water-rich section, medium water-rich section, and weak water-rich section, which are located in northwest and central part, southwest, and the rest part of the mining area, respectively. Mining of Tingnan Coal Mine since 2004 has caused a 3.16 to 194.87 meters drop in groundwater level of Luohe Formation. Until 2015, 70.10% of the mining area undergoes a groundwater level drop larger than 10.00 meters. Another influence of underground mining is that the total flow from 34 springs in 8 southern coal mines of the area has decreased by 286.48 L/s with a rate of decrease at 46.95% from 2007 to 2017. The areas that groundwater level falls or spring flow declines are manly located in the mine gob areas. Results also indicate that the ratio of the height of water conducted fracture zone to the mining height in Binchang mining area is between 16.85 and 27.92. This may increase ground water flow in vertical direction, causing a water level in the aquifer system to drop and ultimately decreasing the flow from the springs. The research results will provide data and theoretical support for the protection of groundwater resources and water conservation coal mining of Luohe Formation in Binchang mining area.

scholarly journals Variation in Groundwater Quality with Seasonal Fluctuation in Jharia Coal Mine Region, Jharkhand, India

2015 ◽  
Vol 10 (1) ◽  
pp. 171-178 ◽  
Author(s):  
Binay Panigrahy ◽  
Prasoon Singh ◽  
Ashwani Tiwari ◽  
Bijendra Kumar
Keyword(s):  
Groundwater Quality ◽  
Coal Mining ◽  
Groundwater Resources ◽  
Seasonal Fluctuation ◽  
Resource Planning ◽  
Mining Area ◽  
Eastern Region ◽  
Mining Areas ◽  
Jharia Coalfield ◽  
Jharia Coal

Jharia coal mining areas is one of the most important coal mining areas in India. It is roughly elliptical or sickles – shaped, located in Dhanbad district of Jharkhand. For the assessment of groundwater quality, Twenty Nine groundwater samples were collected from Jharia coalfield. The pH of the analysed water samples is slightly acidic to slightly alkaline in nature in both the season. The quality assessment of groundwater shows that in general, the water is suitable for domestic purposes with some exceptions. In majority of the samples, the analyzed parameters are well within the desirable limits and water is potable for drinking purposes. However, concentrations of EC, TDS, TH, SO42-, Na+, Ca2+ and Mg2+exceed the desirable limit at few sites. The water level fluctuation shows in the study area for year 2013 is 1.29 to 6.9 mbgl. West and some part of the northern area are facing extreme scarcity due to lower availability of groundwater resource. However, eastern region of the study area has sufficiently available of groundwater resources in the Jharia coalfield. This study is useful for utilization of groundwater resources in mining area and helps in future water resource planning for the area.

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