Ryszard Hejmanowski

Ryszard Hejmanowski
AGH University of Science and Technology in Kraków | AGH · Department of Mining Areas Protection, Geoinformatics and Mining Surveying

Professor

About

66
Publications
11,533
Reads
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444
Citations
Introduction
Ryszard Hejmanowski currently works at the Faculty of Mining Surveying and Environmental Engineering, AGH University of Science and Technology in Krakow/Poland. He does research in Petroleum Engineering, Mining Engineering and Civil Engineering. He is particulary interested in the prediction and modeling of land subsidence due to water, gas, oil extraction, salt- and copper mining. His research group: www.land-subsidence.com
Additional affiliations
October 2018 - present
AGH University of Science and Technology in Kraków
Position
  • Professor (Full)
October 1993 - October 2018
AGH University of Science and Technology in Kraków
Position
  • Professor (Associate)
January 1990 - July 1993
Technische Universität Clausthal
Position
  • Research Associate
Description
  • PhD Thesis

Publications

Publications (66)
Article
Full-text available
The gas transport infrastructure is frequently localized in areas subjected to anthropogenic movements and strains. The potential impact of the ground movements on the gas pipeline in the aspect of its damage can be properly assessed e.g. by predicting strains, taking into account the causes of terrain movement. On the other hand, the hazard is als...
Article
Full-text available
The study analyzes the changes in dynamics of the Jakobshavn Glacier in summer and winter in 2017 and 2021. Satellite radar observations and the available database were used for this. Moreover, the influence of the time baseline between SAR images on the quality of the results was also investigated. The velocities computed from Sentinel-1 images an...
Preprint
Full-text available
The gas transport infrastructure is frequently localized in areas subjected to anthropogenic movements and strains. The potential impact of such deformations on the gas pipeline in the aspect of its damaging can be properly assessed by, e.g. by predicting strains, taking into account the causes of terrain movement. On the other hand the hazard is a...
Presentation
Land subsidence due to mining is primarily caused by the removal of a deposit from a rock mass and the formation of a post-mining void. This type of land subsidence damages surface and underground infrastructure and adversely affects the safety of surface users. Underground mining, however, is also associated with the drainage of rock layers, for b...
Article
Full-text available
Horizontal strains related to mining-induced subsidence may endanger infrastructure and surface users' safety. While directional horizontal strains should be well determined, appropriate solutions for a complete assessment of the terrain surface deformation field are still required. As a result, the presented study examined a new method for calcula...
Article
Full-text available
The marine-terminating glaciers are one of the biggest contributors to global sea-level rise. Research on this aspect of the effects of global climate change is developing nowadays in several directions. One of them is the monitoring of glacier movements, especially with satellite data. In addition to well-known analyzes based on radar data from av...
Conference Paper
The objective of the research was to investigate the process of rock mass recompaction related to groundwater rebound induced by underground mining. Research has been conducted in the area of the closed copper ore mine (Konrad) as well as the anhydrite and gypsum mine (Lubichów) in south-eastern Poland. The mining operation was carried out in the...
Conference Paper
Mining exploitation is associated with the occurrence of adverse environmental effects. The most serious of such effects is land subsidence. Although land subsidence can be well predicted and mitigated by several methods, nevertheless, the extraction of mineral deposits is also associated with induced seismicity. The occurrence of seismic events ca...
Article
Full-text available
One of the most common consequences of pumping water from groundwater reservoirs includes land surface movements. The main cause of this phenomenon is the excess use of groundwater resources, which leads to the development of continuous deformations. In Poland, the reduction of rock mass due to drainage is most often connected with mining operation...
Article
Full-text available
Land subsidence is one of groundwater pumping probably the most evident environemntal effects. This phenomenon is induced by the dewatering of susceptible aquifer systems. Globally, freshwater demand is the leading cause of this phenomenon. Land subsidence induced by aquifer system drainage can reach total values up several meters. The spatial exte...
Article
Full-text available
The presented research aimed to evaluate the spatio-temporal distribution of ground movements caused by groundwater head changes induced by mining. The research was carried out in the area of one of the copper ore and anhydrite mines in Poland. To determine ground movements, classical surveying results and the persistent scatter Satellite Radar Int...
Article
Full-text available
The paper presents a computer program called SubCom v1.0 for determining mathematical model parameters of compaction layers in areas of oil, gas or groundwater extraction. A stochastic model based on the influence function was used to model compaction and subsidence. Estimation of the model parameters was based on solving the inverse problem. Two m...
Conference Paper
Full-text available
The assessment of the impact of mining-induced seismicity on the natural environment and infrastructure is often limited to the analysis of terrain surface vibrations. However, similar seismic phenomena, like earthquakes, may also imply dislocations and deformations of the rock mass. Such ground movements may occur in areas which are not directly u...
Article
Full-text available
Sinkholes are alarming and dangerous events, they have a worldwide occurrence, and are imposing a potential risk to urban communities and the widely developed built environment. Losses due to catastrophic sinkhole collapse, foundation, pavement and structural repairs, occur more often, due to the increased pressure to develop even on sinkhole prone...
Article
Abstract: Mathematical modeling of surface deformations caused by underground mining operation is commonly carried out with the use of empirical, numerical or stochastic models. One of the most frequently applied models for prediction of the ground deformation in many countries is Knothe model. The model, developed by Knothe as a stochastic method,...
Article
Full-text available
Earthquake occurrence is usually unpredictable apart from sites in the vicinity of volcanoes. It is not easy to measure displacements caused by seismic phenomena using classical geodetic methods, which are based on point survey. Therefore, the surveying of ground movements caused by seismic events should be carried out continuously. Nowadays, remot...
Article
Unexpectedly occurring sinkholes caused by shallow submerged voids are one of the key problems of intensively built-up post-mining areas. Five percent of Poland’s territory is still under the influence of post-mining deformation. Impending sinkholes, which tend to develop randomly over very large areas, cannot be detected by using traditional geoph...
Article
Assessing the long-term stability of abandoned mine workings is a challenging problem in geo-mechanical engineering. There are several factors contributing to the long-term behaviour of excavations. Creep and the gradual deterioration of rocks are, in particular, among the dominant factors affecting the long-term stability of abandoned mine working...
Poster
Nowadays, human-induced seismicity is becoming an important issue for the general public. Increased interest in this subject is mostly associated with regions constantly exposed to this type of dynamic phenomena. In many cases, the occurrence of human-induced seismicity is implied by underground mining. Mining operations disturb the natural geomech...
Article
Full-text available
The present research focuses on the definition of a novel methodology for sinkhole risk assessment above shallow salt mines. The research were carried out on the area above the salt mine, a World Heritage site. The study of vertical stresses on the basis of a theoretical state of rock mass deformation in the area of test chambers was performed. Fur...
Article
Full-text available
Presented research focused on the development of a novel methodology for sinkhole risk assessment above shallow caverns in a salt mine. The research was carried out for the Wieliczka Salt Mine, which is registered on the UNESCO list and visited by near around 2 million tourists every year. The main assumption of the investigation was to estimate ro...
Conference Paper
Full-text available
Prediction and monitoring of earthquakes and human-induced seismicity is still a crucial issue primarily due to the random nature of that phenomena. The continuous monitoring of earthquakes made by seismology is well known and developed. The remaining effects of earthquakes – ground displacements, are much more problematic in measurement. Moreover,...
Article
Anthropogenic activity related to the extraction of gas and oil, raw materials or water pumping leads to slow or rapid ground deformation. The ground motion rate is related to the type of the mined material, geological conditions, mining methods and other factors. Ground subsidence resulting from the collapse of underground post-mining voids occurs...
Conference Paper
Modelling of strains and deformations in salt mine areas encounters considerable difficulties because of the varying strength properties of salt, complex morphological formation of dome deposits and rheological properties of salt. Due to such properties the impact of salt extraction increases over hundreds of years and accurate determination of str...
Article
Full-text available
Badania ruchów powierzchni spowodowanych wstrząsami sejsmicznymi są kosztowne i kłopotliwe w planowaniu eksperymentu z uwagi na trudny do przewidzenia czas wystąpienia wstrząsu. Z tego względu jedynie ciągłe bądź quasi-ciągłe obserwacje mogą się przyczyniać do lepszego poznania tych zjawisk. Technologie teledetekcyjne, a w szczególności interferome...
Article
Full-text available
The geodetic measurements optimization problem has played a crucial role in the mining areas affected by continuous ground movement. Such movements are most frequently measured with the classical geodetic methods such as levelling, tachymetry or GNSS (Global Navigation Satellite System). The measuring techniques are selected with respect to the dyn...
Article
Full-text available
Abstract: Dynamic phenomena, both anthropogenic and natural, usually occur unexpectedly, at high speed. During such an event, changes in ground surface morphology become rapid. What is more, permanent ground monitoring in the areas of that transformations is usually not carried out. Therefore, the comprehensive description of the effects of such ph...
Article
Full-text available
Treść: Problem optymalizacji pomiarów geodezyjnych na obszarach poddanych wpływom ciągłych deformacji powierzchni terenu wciąż stanowi wyzwanie. Pomiary ruchów powierzchni na terenach górniczych najczęściej wykonywane są przy wykorzystaniu klasycznych metod geodezyjnych takich jak niwelacja, tachimetria czy pomiary GNSS. Technika pomiarowa jest do...
Article
Full-text available
The modeling of strains and deformations in salt mine areas encounters considerable difficulties because of the varying strength properties of salt, the complex morphological build of dome deposits and the rheological properties of salt. These properties have impacted the development of salt extraction for hundreds of years and the fact that the ac...
Article
Full-text available
Treść: W przypadku kopalń soli problem zachowania bezpieczeństwa w rejonie wyrobisk komorowych i na powierzchni terenu jest niezwykle złożony. Na przebieg procesu deformacji w górotworze solnym mają wpływ zarówno własności geomechaniczne różnych typów soli, jak i cały szereg czynników górniczych, geologicznych i hydrogeologicznych wpływających na p...
Article
Full-text available
The two-year period of the latest satellite mission of the European Space Agency provided images that support analysis of ground vertical displacement on the mining areas. Satellite Sentinel-1A gives the possibility of carrying out such investigation in the cycle of 12 days. In the article the comprehensive introduction to the technological aspects...
Article
Full-text available
The research presented in this paper is basically focused on two objectives. Firstly, the selection of parameters affecting the water supply network damage. The causes of failures were selected from a population of tens of breakdown cases and then classified in view of their importance. Secondly, attention was paid to the selection of the most suit...
Article
Abstract Anthropogenic movements of the rock mass generate strains and displacements on the surface, creating environmentally negative effects and hazards for buildings and infrastructure. The level of uncertainty of the theoretical model is important while predicting this kind of impact and the related hazards. Uncertainty is connected to the degr...
Chapter
This article presents the problem of modelling drainage subsidence that accompanies the mining of solid minerals. Rock mass drainage causes a change in pressure in the aquifer, and thereby initiates the compaction process. On the surface we can observe the effect in the form of a wide drainage basin, which adds to the direct impact of mining operat...
Article
Full-text available
Coal and ore underground mining generates subsidence and deformation of the land surface. Those deformations may cause damage to buildings and infrastructures. The environmental impact of subsidence will not be accepted in the future by the society in many countries. Especially there, where the mining regions are densely urbanized, the acceptance o...
Article
Full-text available
The present research is aimed at a critical analysis of a method presently used for evaluating failure hazard in linear objects in mining areas. A fuzzy model of failure hazard of a linear object was created on the basis of the experience gathered so far. The rules of Mamdani fuzzy model have been used in the analyses. Finally the scaled model was...
Article
Full-text available
Based on the previous studies conducted by the authors, a new approach was proposed, namely the tools of artificial intelligence. One of neural networks is a multilayer perceptron network (MLP), which has already found applications in many fields of science. Sequentially, a series of calculations was made for different MLP neural network configurat...
Article
Full-text available
Excavation of the two bedded deposits of mineral resources in a small vertical distance may cause additional increased mining risks (rock mass deformation, rock bursts and mining tremors, threat to land surface). This paper considers the impact of excavation of the copper ore deposit on the bed of rock salt located above it and the opposite, in ter...
Conference Paper
Full-text available
ZUSAMMENFASSUNG : In dem Vortrag werden zwei für Senkungen gezeigt, die durch Bergbau unter ungewöhnlichen geologischen Bedingungen verursacht wurden. Im ersten Beispiel wird den Einfluss der Anisotropie des Gebirgskörpers auf Senkungen vorgestellt. Das Zweite zeigt den Einfluss von dickem Jura-Kreidegestein im Deckgebirge auf die Senkung. Darüber...
Article
Full-text available
Analiza awaryjności sieci wodociągowej w świetle rozkładu ciągłych deformacji powierzchni terenu w czasie Pipelines' failure analysis in the light of space-time distribution of ground deformation Treść: Przewidywanie miejsc newralgicznych z punktu widzenia zagrożenia awariami wywołanymi przez deformacje powierzchni jest niezwykle utrudnione. Progno...
Article
Full-text available
Kinematyka konwergencji górotworu solnego oraz przemieszczeń punktów w rejonie szybu Kinga KS " Wieliczka " S.A. Kinematics of convergence of the rock mass and displacements of benchmarks in the area of the shaft St. Kinga at the salt mine " Wieliczka " S.A. Treść: Pomiary konwergencji stosowane są w górotworze celem badania i lokalizacji miejsc sz...
Article
Full-text available
Treść: Przedmiotem artykułu są wyniki badań rozwoju ciągłych deformacji górotworu w rejonie szybu Św. Kingi w Kpalni Soli " Wieliczka " S.A.,w całym okresie istnienia szybu, tj od drugiej połowy XIX w. Ze względu na to, że szyb pierwotnie nie podlegał monitoringowi geodezyjnemu, badania zostały wsparte wynikami obliczeń modelowych. Wyniki obliczeń...
Conference Paper
Full-text available
At the beginning of 2012 in the mines of KGHM Polish Copper SA started the implementation of laser scanning of underground mine infrastructure. These survey have been used in the design and conduct of mining planning. A scanner Leica C-5 with unlocked function of the range and speed of scanning has been implemented. The paper presents the experienc...
Conference Paper
Full-text available
The mining causes a number of transformations of the surface terrain. The more built–up is mining terrain area, the more burdensome is the mining activity. The specificity of the Polish mining terrains is intensive land use, that’s why proper damage risk assessment of the buildings and infrastructure is one of the key problems in these areas. The r...
Conference Paper
Full-text available
The occurrence of the sinkholes in the urban areas is a direct threat to life. In the case of the shallow salt mining the hazard of sinkhole occurrence is very high. There are many more factors quantitative and qualitative that have an effect on increase the hazard of sinkhole development. The problem of sinkhole-prone caves is extremely complex an...
Conference Paper
Full-text available
Underground exploitation of copper ore deposits causes deformations of the surrounding rock mass, thus affecting buildings located there. Effective protection of such buildings has an increasing importance and may, in consequence, contribute to the increase of social acceptance to the development of mining activity. The prerequisite for that is pro...
Article
Full-text available
Hydrocarbon production under certain geological conditions of these deposits can cause surface subsidence and deformation of the terrain surface. Such deformations appear as subsidence troughs of considerable range and the magnitude of the subsidence depending on the total thickness of the reservoir, compaction properties of reservoir and on the nu...
Article
The aim of the paper was to present an approach to building damage risk assessment on mining induced areas. The presented method was developed in Poland and then adopted in the other European countries. The method shown is based on a comparison between buildings strength and terrain deformation. Prediction principles of the mining terrain deformati...
Article
Surface subsidence induced by underground mining activity may cause danger to buildings and infrastructure. The issue of the surface subsidence modelling is known for many years. The Knothe's theory is the most often used method of surface deformation modelling. Surface subsidence predictions accuracy depends mainly on the correct identification of...
Article
Full-text available
Horizontal displacement play a particularly important role in predicting deformations in the miting areas, where majority of buildings are damaged as a result of operation of horizontal displacements. The geometry and integration theories of predicting deformations employ coefficient" B" introduced by Avershin. The coefficient of horizontal disp...
Conference Paper
This paper presents the most modem view and solutions used in mining areas for the forecasting mining influence on particular buildings and other infrastructure. The main role in our solution plays Knothe theory, forecasting mining influence. The theory has been modified according to current conditions of exploitation fields and implemented in our...
Conference Paper
A project of GPS deformation measurements has been provided for the copper ore mine "Rudna", belonging to KGHM "Polska Miedi" S.A. Over 300 benchmarks have been measured since 2000. Extensive measurement results enabled thorough analysis of horizontal and vertical movements on the terrain surface. On the basis of this interpretation an area of dyna...
Article
Full-text available
Oil and gas development from underground reservoirs disturbs original rock mass balance. The tending of the rock mass to achieve a new, even only temporary balance is manifested in the movements of the ground surface. Movements can affect ground infrastructure like offshore platforms, pipelines and buildings. For increasing the efficiency of the pr...
Article
Full-text available
The underground exploitation of mineral and fossil fuel deposits in the solid, liquid or gaseous from leads to the disturbance of the existing equilibrium in the rock mass. The tending of the rock mass to achieve a new, even a mere temporary equilibrium state is manifested among others in the form of movements on the ground surface. These movements...
Article
Full-text available
291 8381 extension 420, 206, fax 32 2915865 Satellite Radar Interferometry is a unique method making it possible to investigate land subsidence in precisely specified time and within exactly the same period of time, on the area of tens of thousands square kilometres simultaneously. So far in Poland, the above-mentioned method has been used on the u...
Article
Full-text available
The paper gives the methods for surveying horizontal deformations due to underground mining activities. The measurement techniques were compared in view of different coal-basins across Europe, Germany and Poland in particular.
Conference Paper
Full-text available
INTRODUCTION With the introduction of a limited free market economy in the early 1990's the Polish coal mining industry started to convert to private enterprise. As is normal with such changes, from state run to a more free market approach, the initial drive is to improve productivity. This can be achieved by raising the yield, and by extension so...
Article
Full-text available
Compaction phenomenon caused by oil-or gasfield development can induce the considerable surface deformations. Surface deformations above the oil-or gasfields were observed and measured in Wilmington, Bolivar Coast and at last over the Ekofisk field. When rocks, building the oil-or gas-reservoir have significant compaction coefficient, thickness of...

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