Regional local integrated rockburst monitoring and early warning for multi-seam mining

Rockburst has become a main problem affecting the safety and efficiency of coal mine production. Early warning of it is essentially important for safety management. The dynamic and static load sources of rockburst, induced by multi-coal seam mining, are more complex, making rockburst prediction more difficult. The problem of rockburst early warnings in multi-seam mining was addressed by establishing a regional local integrated rockburst monitoring and early warning method based on the following criteria. (i) In regional space, the microseismic (MS) frequency ratio index and dispersion index were used to predict the regional dynamic load. (ii) In the local excavation and mining space, the risk degree of local static load concentration was characterised by the overrun amplitude indexes of electromagnetic radiation (EMR) intensity and pulse. (iii) According to the predicted spatial location of dynamic load and the attenuation law of regional dynamic load, the influence weight of the regional dynamic load on the excavation and mining space was determined. Based on this, the danger degrees of regional dynamic load and local static load were superposed to realise the regional local integrated warning of rockburst. This prediction method was applied for predicting rockburst in the Xinzhouyao mine, and the result indicated that the method can effectively predict the occurrence of dynamic load, the risk degree of local static load and rockburst induced by multiple types of dynamic and static loading combined together. The reliability of this prediction method was verified by records of roadway deformation and rockburst, and detection results from passive velocity tomography.

Resilience in a behavioural/Keynesian regional model

This paper constructs a regional dynamic macroeconomic model with an eclectic, broadly Keynesian and behavioural flavour. The model, which is parameterized on Scottish data, is used to identify the impact of expectations and business confidence on regional resilience. Simulations compare the evolution of the regional economy after a temporary negative export shock under a range of investment functions. The mainstream perfect foresight formulation generates a reduction in activity, which is small and is limited to the duration of the shock. The heuristic-based, imperfect-information investment models produce more negative, longer-lasting and unstable adjustment paths.

MODELING OF VARIABILITY OF THE REGIONAL DYNAMIC PROCESSES DEVELOPED DURING 2017-2019 IN THE EASTERNMOST PART OF THE BLACK SEA

The study of water circulation and thermohaline processes in the coastal zones of the seas and oceans, subjected to the most intense anthropogenic press, is an important problem of modern Oceanology. According to experimental and theoretical researches the coastal water areas of the Black Sea are dynamically active regions, where intensive generation of mesoscale and submesoscale eddies takes place. Such eddies make a significant contribution to the horizontal and vertical transport of different polluting substances, heat, momentum, etc. Therefore, the modeling and study of main peculiarities of variability of regional dynamic processes is of great scientific and practical interest. The goal of this study is to investigate numerically the structure and spatial –temporal distribution of the sea flow and thermohaline fields taking place during the period 2017-2019 in the easternmost part of the Black Sea, which is limited from the open part of the sea basin with liquid boundary coinciding 39.080E. With this purpose a high-resolution numerical regional model of the Black Sea dynamics of M. Nodia Institute of Geophysics of I. Javakhishvili Tbilisi State University (RM-IG) is used. The RM-IG is nested in the basin-scale model of the Black Sea dynamics of Marine Hydrophysical Institute (Sevastopol) and is based on a primitive system of ocean hydrothermodynamics equations. The RM-IG uses a calculated grid having 215x347 points on horizons with 1 km spatial resolution. Results of researches presented in the paper show significant variability of the regional dynamic processes in the easternmost water area during 2017-2019, where continuously generation, deformation and disappearance of the cyclonic and anticyclonic vortex formations of difference sizes takes plac

Geographical names to support monitoring of the regional dynamic in Magelang, Central Java, Indonesia

<p><strong>Abstract.</strong> Maps is a valuable tool for the geographer to do geographical research. One of the maps’ layer is geographical names. Geographical names belong to the cultural heritage and could help identify the development of human’s civilization. The boundaries that spread throughout a region have the characteristic of constraining both juridically and legally-formal up to its social aspects. However, the regional borders that have previously been determined are now open to modifications over time. The objectives of this research are : 1) analyse the multitemporal maps as the source of geographical names dynamic inside an area; 2) interpret data of dynamic geographical names obtained to be the basis of regional boundaries alteration. The historical map collection of the Royal Tropical Institute in the Library of Map Leiden University (Maps of Magelang from 1855, 1915, 1938, 1940), the topographic map of the U.S. Army Map Service (AMS) (printed in 1945), the Indonesian official topographic maps (Peta Rupabumi Indonesia-RBI) dated 2001, the Google Maps 2018, and the OpenStreetMaps 2018 are altogether utilized in studying the geographical names dynamic of both Magelang Municipality and Magelang Regency. The multitemporal geographical names data are later to be employed to assist the analysis of regional dynamic. We applied the descriptive qualitative method in this research. The existing maps published during the colonialism era and post-Independence Day (1945) can be beneficial to locate the development of regional boundaries and as a resource of multitemporal geographical names. The existence of Magelang Municipality physically has been found since the region belonged to Kedu Residency. On the other hand, the administrative borders were first emerging in a map issued in 1938. The maps from 1855 to 2001 showed that administrative borders of the regions and geographical names examined before were bound to change, mainly on district names. This matter happened due to the proliferation and integration of regions within the Municipality and Regency. Although the borders appeared the same on some of the maps (the 1855 version was similar to the 1915’s and from 1938 to 1945 showed the parallel border lines), the maps showed different geographical names. The orthography of geographical names is experiencing changes as well, from using diacritic to using the Perfected Spelling System (Ejaan Yang Disempurnakan-EYD).</p>