Abstract
The objective is to analyze the dynamics of the underground water of a mine field based on the study of the geofiltration process of the rock mass disturbed by mining to achieve safe extraction operations as well as subsurface territories at the stage of the mining enterprise closure. Numerical modeling, based on a finite difference method under the conditions of multifactority and definite uncertainty of processes of transformation of technogenic environment of a mine field, helps solve a problem concerning underground water dynamics forecasting. A hydrodynamic model of the M.I. Stashkov mine was developed while solving option series of epignosis problems in terms of the chronology of mine field stoping. The abovementioned made it possible to identify regularities of the history of filtration, the capacity parameters of rock mass and the expansion of areas of heightened hydraulic conductivity as well as to evaluate qualitatively the water balance components of a carbonic watered formation and an overlying one. The stage of mining closure helped obtain the forecasting hydrodynamic solutions. The efficiency of measures, concerning reduction of water ingress into mine workings and the mitigation of surface ecological effects of mine flooding was evaluated quantitatively. It was determined that implementation of the water control procedures makes it possible to perform a 10–38% decrease in water ingress. In this context, they may be applied both independently and simultaneously. In terms of mine closure and flooding, a period of complete underground water recovery takes three years; in the process, surface zones of potential waterlogging and swamping are developed within the floodplain of Samara River, located at the territory of Western Donbas (Ukraine). The scientific novelty is to define regularities of hydraulic conductivity transformation of the rock mass of a mine field starting from the mine working roof fall, up to its compaction during the mine operation period. To do that, nonstationary identification problems were solved, using numerical modeling. The abovementioned makes it possible to improve the reliability of hydrodynamic prognoses and develop technological schemes to control water at the state of the mine closure.
Highlights
IntroductionResearchers consider a process of underground coal mining as one of the major technogenesis types that is comparable with geogenesis in terms of intensity and metamorphosis depth [1,2]
Scientific and technical approaches to model geofiltration within coal deposits were substantiated in terms of the hydrodynamically open type of the M.I
A process of natural hydrodynamic pattern reproduction, using the developed mine field model for the mine preoperational period helped to support the reliability of the actual underground water data as well as to balance the numerical model (Table 1)
Summary
Researchers consider a process of underground coal mining as one of the major technogenesis types that is comparable with geogenesis in terms of intensity and metamorphosis depth [1,2]. Large-scale transformations of rock mass factor lead to changes in the state and characteristics of both the subsurface [3,4,5] and the whole environment [6,7]. Underground water is the basic dynamic subsurface component helping to perform energy, mass, and heat transfer [8,9] as well as to transfer common groundwater contaminants [10,11,12,13]. Water can vary the properties of the geosystem and environment [14], and activate exogenic
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
