Wyniki wyszukiwania - BazTech

1

Establishing the Vertical Movement Map of Cuu Long Delta River by GNSS Data

Nguyen Gia Trong, Nguyen Viet Nghia, Ly Lam Ha, Vu Trung Dung, Nguyen Quoc Long, Kim Thi Thu Huong, Pham Ngoc Quang, Nguyen Viet Quan

Inżynieria Mineralna

|

2023

|

no. 2, vol. 1

173--177

EN

Mekong Delta is an area with an important position in the socio-economic development of Vietnam. However, due to the impact of climate change as well as of the construction of hydroelectric dams in the upstream of the Mekong River in recent years, saline intrusion and flooding have been occurred because of high tide. According to published researches, the Mekong Delta is being experienced surface subsidence with a rate of up to centimeters per year, that exacerbates the impact of saline intrusion and flooding. Thus, studying to establish the surface subsidence map is an urgent need in this site. There are many of technologies to create the vertical movement map such as: Levelling, INSAR, GNSS, etc. Up to now, there are no scientific reports on the application of GNSS to monitor the vertical movement in this area. In this paper, the authors have calculated the largest vertical displacement velocity up to 3cm/year based on processing GNSS observations of nearly 20 GNSS monitoring station in the area using Bernese software. From these results, the research team has made the vertical movement map of Mekong, Vietnam.

2

Mining-induced Land Subsidence Detected by Sentinel-1 SAR Images:An Example from the Historical Tadeusz Kościuszko Salt Mine at Wapno, Greater Poland Voivodeship, Poland

Kim Thi Thu Huong, Tran Hong Ha, Bui Khac Luyen, Lipecki Tomasz

Inżynieria Mineralna

|

2021

|

no. 2

41--52

EN

There are many mines in Poland that have been in operation for over 100 years, with the Tadeusz Kościuszko mine being a large salt mine in Wapno, northern Poland. The mine was closed in 1977 due to the greatest catastrophe in the history of Polish mining, but in the first days of 2021, a very large hole has been created in this area due to land subsidence. This article uses InSAR technology with Sentinel-1 images to determine settlement and ongoing deformation in this mine. The study results are useful for policymakers, managers, and authorities because land subsidence has caused serious and dangerous effects on people living in the area. The results processed by the Persistent Scatterer InSAR (PSInSAR) method with the Sentinel Application Platform and the Stanford Method for Persistent Scatterers software packages show that deformation in the Wapno village area has been detected in both residential and non-residential areas, with maximum subsidence of up to −19 mm/yr. The subsidence in the mine reaches −12 mm/yr, and that at surrounding area range from 0 to −18.8 mm/yr.

3

The Development of Terrestrial Laser Scanning Technology and Its Applications in Mine Shafts in Poland

Lipecki Tomasz, Kim Thi Thu Huong

Inżynieria Mineralna

|

2020

|

no. 2, vol. 1

301--310

EN

Laser scanners are used more and more as surveying instruments for various applications. With the advance of high precisions systems, laser scanner devices can work in most real-world environments under many different conditions. In the field of mining surveying open up a new method with data capturing. Mining industry requires precise data in order to be able to have a as-built documentation of the facility. Nowadays, the mines are increasingly deepened. For the safe operation of the underground mine, special attention is paid to vertical transport and a set of devices supporting it, mounted in mining shafts. All components must meet stringent criteria for proper operation. The classic geodetic measurements and mechanical tests are long-lasting and do not always provide the full range of information needed about the condition of the object. This paper reports about terrestrial laser scanning method and system mobile terrestrial laser scanning, which has been applied at many vertical shafts in mines of Poland for determining geometric deformation of vertical shaft elements. This system gives high precision 1–3 mm in every horizontal cross-section. Processing time is very quickly and need only few staff to implement all system.

PL

Skanery laserowe są coraz częściej używane jako urządzenia geodezyjne do różnych zastosowań. Wraz z rozwojem systemów o wysokiej precyzji, skanery laserowe mogą pracować w większości rzeczywistych środowisk w wielu różnych warunkach. W dziedzinie geodezji górniczej otwierają się nowe metody gromadzenia danych. Górnictwo wymaga precyzyjnych danych, aby móc posiadać dokumentację powykonawczą obiektu. Obecnie kopalnie są coraz bardziej pogłębione. Dla bezpiecznej eksploatacji podziemnej kopalni szczególną uwagę przywiązuje się do transportu pionowego oraz zespołu wspierających urządzeń, zamontowanych w szybach górniczych. Wszystkie komponenty muszą spełniać rygorystyczne kryteria prawidłowego działania. Klasyczne pomiary geodezyjne i badania mechaniczne są długotrwałe i nie zawsze dostarczają pełnego zakresu potrzebnych informacji o stanie obiektu. W artykule opisano metodę naziemnego skanowania laserowego oraz systemowe mobilne naziemne skanowanie laserowe, które zostało zastosowane w wielu pionowych szybach w polskich kopalniach do wyznaczania odkształceń geometrycznych pionowych elementów szybów. System ten daje wysoką precyzję 1-3 mm w każdego przekroju poziomym. Czas przetwarzania jest bardzo szybki, a do wdrożenia całego systemu potrzeba tylko kilku pracowników.