The influences of coal mining on the large karst springs in North China

Wu, Qiang; Li, Xing; Ye, Chun He; Liu, Yuan Zhang

doi:10.1007/s12665-009-0376-y

Cited by 39 publications

(23 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To assess the relationships between tectonic and hydrodynamic conditions, tracer methods of reservoir research are commonly used [Huang et al, 2018;Wu et al, 2011;Yao et al, 2016]. The results of tracer tests at the Urna field demonstrate that these relationships are ambiguous (Fig.…”

Section: Comparison Of Tectonic Conditions and Productive Rock Hydrodmentioning

confidence: 99%

Geodynamic and hydrodynamic conditions of the Urna and Ust‐Tegus oil fields

Курчиков¹,

Plavnik²,

Курчиков³

2019

Geodin. tektonofiz.

View full text Add to dashboard Cite

This paper discusses the productive beds of the Urna and Ust‐Tegus oil fields (West Siberia, Russian) and permeability and capacity properties that are influenced by geodynamic processes. Strong tectonic processes, accompanied by periodic magma intrusions, produced numerous fractures and faults in the Jurassic sediments, which act as conduits for groundwater flows, and thus led to the hydrothermal alteration of rocks and changes in the pore space. The data presented in the paper testify to the manifestation of these processes in the modern hydrogeochemical and geothermal conditions of the Jurassic‐Cretaceous sediments within the two oil fields and their vicinity. The petrophysical studies of the core samples and the hydrodynamic studies in the wells confirm that the reservoir properties of the productive strata are considerably heterogeneous. Despite the significant effect of the geodynamic factors, the analysis of the tracer data has not revealed any apparent spatial consistency of the presence (or absence) of a hydrodynamic connection between the wells and the locations of fractured and dynamically stressed zones. In our study, we have proposed and tested a method based on the analysis of morphotectonic features detectable in the depth maps of reference surfaces. This method is a useful additional tool for discovering and analyzing the relationships between the tectonic and hydrodynamic conditions of oil and gas fields.

show abstract

Section: Comparison Of Tectonic Conditions and Productive Rock Hydrodmentioning

confidence: 99%

Geodynamic and hydrodynamic conditions of the Urna and Ust‐Tegus oil fields

Курчиков¹,

Plavnik²,

Курчиков³

2019

Geodin. tektonofiz.

View full text Add to dashboard Cite

show abstract

“…Due to the presence of faults, collapse columns and other geological structures, most coal mines in the north are under the threat of Ordovician karst water. Coal mine drainage, local water supply and environmental protection have relatively obvious contradictions [32].…”

Section: The Impacting Mode Of Coal Mining On Karst Watermentioning

confidence: 99%

“…Time falls into two stages: annual data of two series are stable in phase I; with the abrupt increase of mine drainage, the spring flow shows a significant decrease in phase II. Coal mine drainage changes the circulation route of groundwater; the source of mine water inrush is mainly karst water [32]. Thus, the influence of coal mining on karst water resources in the study area cannot be ignored.…”

Section: The Importance Of Coal Mining To Karst Water Resourcesmentioning

confidence: 99%

Evaluating the Impaction of Coal Mining on Ordovician Karst Water through Statistical Methods

Huang

Liu

Wang

2018

Water

View full text Add to dashboard Cite

This study aims to reveal karst water trend change and the variation of affecting factors in the Heilongdong spring area due to long-term coal mining. In this study, five yearly recoded data over more than 40 years were collected, including underground water level dynamics, water flow, groundwater withdrawal for industrial and agricultural production and domestic production (groundwater withdrawal), mine drainage and rainfall. On that basis, we conducted linear regression, innovative trend analysis (ITA) and the Mann–Kendall method to quantitative analyze the trend and mutation sequence of the time series of environmental hydrological parameters in the study area. To determine the correlation of different affecting parameters under coal mining, as well as the trend of the correlation, we conducted multivariate linear regression analysis and exploited wavelet coherence. The results suggest: (1) under human influence, the annual value of underground water level in the Heilongdong spring area shows an insignificant decrease of 0.42 m/a; precipitation shows a significant downward trend of 2.34 mm/a, primarily the decrease of rainstorm; the spring flow shows a significant decrease of 9.41 × 106 m3/a, and springs with different flow show a significant decrease. (2) The abrupt changes of various factors affecting spring flow in the study area were successively delayed by rainfall, mine drainage rate, industrial and agricultural water consumption and underground water level. (3) Since the year of the start of dramatic changes, under the impact of increased manual mining and mine drainage, the amount of spring overflow has decreased, the groundwater level has decreased, and the groundwater dynamics have varied from meteorological type to meteorology-artificial type. Moreover, the factors affecting the dynamic changes of groundwater have been changed to rainfall and artificial mining and drainage. (4) As the results of Wavelet coherence analysis suggest, the spring flow resonates significantly with rainfall from the period of 3a to 15a. The correlation between the original spring flow and groundwater level is more obvious than that between the original spring flow and rainfall. The correlation between residual flow and groundwater level is less obvious than that between residual flow and rainfall. The above results provide a basis for comprehensively exploiting water resources in coal mining areas and regional groundwater resources protection measures.

show abstract

“…Wu et al used an artificial neural network to determine the weight coefficient of each factor that affects water inrush. e characteristics of water disasters in North China coalfields were summarized by analyzing the hydrogeological conditions of mining areas [12]. Ma et al developed a numerical fast Lagrangian analysis of continua in three dimensions model to understand the mechanical state of a coal seam penetrated by a KCP during mining panel extraction [13].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Seepage Stability of Filling Material of Karst Collapse Pillar in Mining Engineering

Chen

2018

Advances in Civil Engineering

View full text Add to dashboard Cite

In northern China, groundwater inrush of Karst collapse pillar (KCP) often affects the coal mining process. Current studies rarely consider the seepage stability of filling materials of KCP, especially through experimental investigations. This study is to quantify the impacts of variable initial porosity and cementing strength on the seepage properties of filling material. For this purpose, we designed and fabricated a test system. This system can offer high water pressure and abundant water flow rate. We tested three types of specimens which were cemented by clay, gypsum, and cement, respectively. The seepage properties were obtained under the initial porosity of 0.11, 0.13, 0.15, and 0.17, respectively. The change mechanism of seepage properties was measured through the comparison between mass loss and mass gain. The results showed the followings findings: (1) The permeability-time curves have two types: the first type is that permeability gradually increases up to the occurrence of seepage instability and the second type is that permeability gradually decreases and approaches to a stable value. No seepage instability is observed. (2) Initial porosity and cementing material significantly affect the water flow properties of filling material. In general, larger initial porosity has larger permeability. For clay as cementing material, seepage instability occurs soon and higher initial porosity has shorter time to reach seepage instability. For gypsum, seepage instability occurs after a period of time when initial porosity is large enough. For cement, the permeability decreases gradually and approaches to a stable value. The permeability-time curves have rapid decrease and slow decrease. (3) The permeability has a magnitude of 10−15–10−13 m2 and varies with initial porosity and cementing materials. The permeability is the largest for clay cementing and is the smallest for cement cementing.

show abstract

The influences of coal mining on the large karst springs in North China

Cited by 39 publications

References 10 publications

Geodynamic and hydrodynamic conditions of the Urna and Ust‐Tegus oil fields

Geodynamic and hydrodynamic conditions of the Urna and Ust‐Tegus oil fields

Evaluating the Impaction of Coal Mining on Ordovician Karst Water through Statistical Methods

Experimental Investigation on Seepage Stability of Filling Material of Karst Collapse Pillar in Mining Engineering

Contact Info

Product

Resources

About