Coal is the main energy source in China, but its underground mining causes surface subsidence, which seriously damages ecological and living environments.How to calculate subsidence accurately a core issue evaluating damage.At present, most commonly used method of calculation Probability Integral Method (PIM), based on normal distribution.However, this has limitations thick topsoil (thickness > 100 m), that extent calculated boundary basin smaller than real extent, an undoubted impact...

The coal exploitation in the Upper Silesia region (along Vistula River) triggers strata seismic activity, characterized by very high energy, which can create mining damage of surface objects, without any noticeable damages underground structures.It is assumed that appearance energy events result faults' activation vicinity excavation.This paper presents analysis a case study one mine, where during longwall panel no.729, occurred faulty neighborhood.The authors had analyzed cause presented...

The topic of residual subsidence is important in Europe as it defines possible surface deformation for closed mine areas. It has to be determined because potential financial claims and damages sensitive objects such satellite dishes, precision mechanics objects, agriculture, forestry hydrogeology, etc. Analyses measured after the end mining exploitation indicate that this process can last from several months dozen or even hundred years, final not known. dependent on individual’s features...

The paper presents an analysis of the horizontal displacement surfaces induced by exploitation in a longwall panel. panel under discussion is No. 698 Prosper Haniel coal mine, Germany. author discusses both distribution vectors, according to theory assuming surface point towards center gravitation (COG) zone selected deposit element, and measurements, based on assumption that value proportional slope subsidence trough. Finally, coefficient B estimated for particular longitudinal transverse...

The article presents a method of forecasting the deformation land surface over large fields underground gas storage facilities located in salt caverns. solution allows for taking into account many parameters characterising operation facilities, such as cavern processes (leaching, enlargement, operational, etc.), their depth, distribution, diameter, shape, and others. advantage applied other available options is possibility using it caverns while keeping calculations simple. effectiveness has...

Abstract The paper presents the results of analyses on tendency bedded rock mass towards rockburst, carried out basis laboratory tests samples and determined indices, as well by means numerical calculations. first part discusses selected parameters evaluating rocks burst, which analysis was in order to assess rockburst hazard complexes strata Upper Silesian Coal Basin. Rockburst is also analyzed with use methods calculations damage development exploitation front during coal deposit...

The change in the European Union’s policy related to energy transformation of Europe and departure from fossil resources may contribute accelerated closure many coal mines. Therefore, it is necessary solve problem surface subsidence after end underground mining suitability post-mining areas for re-use so-called reclamation areas. In case suitable re-use, determine value final subsidence. It also important specify time which influences will no longer have a significant impact on...

Abstract The paper presents the analysis of phenomenon horizontal displacement surface induced by underground mining exploitation. In initial part, basic theories describing are discussed, followed three illustrative examples exploitation in varied conditions. It is argued that center gravity (COG) method presented paper, hypothesis Awierszyn and model studies carried out Strata Mechanics Research Institute Polish Academy Sciences indicate proportionality between vectors vector slope....

Abstract The geometric-integral theories of the rock mass point movements due to mining exploitation assume relationship between progress subsidence and horizontal movement. By analysing movement trace a located on surface, influence in mass, an equation describing main components deformation conditions was formulated. result is consistent with situ observations indicates change component volume exploitation. analyses demonstrate clearly that continuity adopted many solutions form:...

Mining operations disrupt the structure of rock layers, leading to surface deformations and potential mining damage. This issue has been extensively studied since 19th century using various analytical, geometric-integral, stochastic methods. Since 1990s, numerical methods have increasingly applied determine changes in stress strain states masses due activities. These account for numerous additional factors influencing deformation, offering significant advantages over classical approaches....

Abstract Underground mining exploitation may result in damages to building objects located on a terrain surface. Considering high harmfulness of this phenomenon, the scientists from all over world have tried describe impact underground deformations surface and thereon. The first theories, based Gaussian distribution, emerged 1950s are use until now. Later on, connection with development computational techniques, their availability numerical methods, possibility computations for forecasting...

Abstract Underground mining exploitation creates damage in surface building structure and underground constructions as well. For this reason, many companies gave up carrying out excavations safety pillar shafts. Currently, the situation on market is changing. The continuous increase excavation depth combined with an costs resulted trying to find cheaper solutions. One of methods carry partial exploitations inside Such much than ordinary, because it decreases depth, length transportation...

This paper presents the authors' computational methods based on Knothe's theory. The enable estimation of reduction coefficient for effects which originate from mining operations performed via application a longitudinal structure is sunk in to ground. It could be, example, partition, as structural gap fulfils function an expansion grout, or breaking subsoil continuity (e.g. because creating peat-filled ditch using natural gap). Demonstrative calculations have been carried out few cases, i.a....

The paper presents a new geotechnical solution indicating possibility of effective building structures protection.The presented solutions enable minimization negative effects underground mining operations.Results numerical modelling have been for an example design preventive ditches reducing the influence operations on ground surface.To minimize damage or to reduce its reach it is reasonable look technical solutions, which would protection structures.So far authors concentrated primarily...

the application of knothe's theory for planning mining exploitation under threat discontinuous deformation surface and prediction ground movements with rising water levels in post-mining phase introduction rapid expansion European coal industry since early days industrial revolution at end 19 th beginning 20 century, following two World Wars, combined a growth population density coalfield areas, resulted increasingly frequent incidents mining-induced damage to buildings

Abstract The paper presents a wide-ranged analysis of horizontal displacements in the region underground mining exploitation. Initially, various theories pertaining to determination mining-induced displacement are discussed, followed by complex study on measured for selected example German coal mine BW Prosper Haniel, as well factor B.

Abstract The article presents an analysis of the horizontal land surface displacements taking place as effect coal exploitation on Girondelle 5 seam in Friedrich Heinrich-Rheinland mine Germany. paper changes displacement vectors measured following progress face and measurements assuming that their magnitude is proportional to profile subsidence trough slope. Then, values coefficient B are assessed for selected longitudinal transversal calculation cross-sections longwall No. 537.

Abstract Determination of original state stress in rock mass is a very difficult task for mechanics. Yet, has fundamental influence on secondary stress, which occurs the vicinity mining headings. This, turn, cause occurrence number hazards, i.e., seismic events, bursts, gas and outbursts, falls roof. From experience, it known that depends lot tectonic disturbances, faults folds. In area faults, great events occur, often high energies. These many cases, are bursts damage to constructions...