Förbättring av cykling som hållbart transportmedel kräver skräddarsydda transportsystem. Svenska kommuner, som Vänersborgs, har påbörjat implementering av cykelplaner vid planering av infrastruktur. Med kommunens samtida mål om att öka invånarantalet från 39 000 till 50 000, är planens mål och riktlinjer för att utveckla ett högkvalitativt, säkert cykelvägnät som kopplar samman viktiga målpunkter och minskar olyckor. Denna avhandling utvärderar säkerheten och tillgängligheten över gång- och cykelvägnätet till skolor inom Vänersborgs kommun med hjälp av GIS-analyser, där fokus riktar mot barn i åldrarna 7–15 år, men även säkerheten över totala gång- och cykelvägnätet utvärderas. Studieområdet inkluderar Vänersborgs centrum, Öxnered och Vargön. Multikriterieanalys (Analytisk Hierarkisk Process) metoder med kombination av nätverksanalys användes för att bedöma GC-nätets säkerhet och tillgänglighet. Experter viktade olika kriterier för säkerhet, vilket ledde till säkerhetsklassificering i ArcGIS Pro. Inkluderade kategorier var Mycket god, god, mindre god och låg. Nätverksanalysen i ArcGIS Pro prioriterade rutter via gång- och cykelvägnätet och förbjöd rutter att färdas längs vägar med hastigheter över 80 km/h, med hjälp av verktyget Closest facility för att planera rutter till skolan och undersöka tillgängligheten. Resultaten visade att 48.33% av det totala GC-nätet klassificerades som mycket god, 1.89% som god, 26.14% mindre god och 23.64% som låg. Nätverksanalysen indikerade en tillgänglighet till skolor uppnår 73.98%. Trots en signifikant andel av GC-nätet uppnår mycket god säkerhetsnivå, noterades brister, specifikt vid mer urbana områden där vissa segment klassas som mindre god och låg. Sammantaget visar avhandlingen att medan GC-nätet generellt uppnår god säkerhet och tillgänglighet, förekommer märkbara brister. Att se över och eventuellt åtgärda dessa brister skulle främja utvecklingen av cyklandet i Vänersborgs kommun. / Enhancing bicycling as a sustainable transportation mode requires tailored transportation systems. Swedish municipalities such as Vänersborg are integrating bicycling into infrastructure planning. The municipality's aims to grow the population from 39,000 to 50,000, the plan aims to develop a high-quality, safe bicycle network connecting key destinations and reducing accidents. This thesis evaluates the safety and accessibility of the bicycle network to schools within Vänersborg municipality using GIS-based analyses, focusing on children aged 7 to 15, while also evaluating the safety of the total network. The study area includes Vänersborgcity center, Öxnered, and Vargön. Multi-Criteria Decision Making (Analytical Hierarchy Process) approaches coupled with network analysis were utilized to assess the network's security and accessibility. Experts weighted different security criteria, leading to a safety classification in ArcGIS Pro. Categories included very good, good, not so good, and low. The Network analysis in ArcGIS Pro prioritized bicycle routes and restricted roads with speed limits over 80 km/h, using the Closest Facility tool to route school access. The results indicated that 48.33% of the network was classified as very good, 1.89% asgood, 26.14% as not so good, and 23.64% as low. The network analysis indicated a 73.98% accessibility coverage to schools. Despite a significant portion of the network achieving a very good safety level, deficiencies were noted, particularly in urban areas where some sections were rated as not so good and low. Overall, the thesis reveals that while the bicycle network generally achieves good security and accessibility, there are notable shortcomings. Addressing these gaps is crucial for Vänersborg's efforts to promote cycling and support population growth.

The Garpenberg mine, owned by the Boliden Mining group, has established a trial area at Dammsjön orebody in order to examine the possibility of increasing the productivity of the mine. The mine uses the rill mining method with a current rill height of 15 m. In order to increase the productivity, the mine is examining the possibility of increasing the height of the rill. The trial area is located at 882 m depth surrounded by dolomite on the hangingwall and quartzitic rock on the footwall side. Rock support arches have been installed, in addition to the regular support pattern, to test their effectiveness on stabilizing the ground around the drifts. The arches have been installed in every 6 m and every 3 m in different parts of the test area. Rock samples from the trial area were brought to the university laboratory for testing. The data gathered from the laboratory tests along with the data from the monitoring of the trial area were used to develop a calibrated numerical model. A three-dimensional (3-D) model was therefore created, by using the FLAC3D numerical code. After the calibration of the model a parametric study was conducted for different rill heights and different arch spacing to investigate the performance of the arches. Specifically, the case of no arch installation along with the cases of an installed arch every 6 m and 3 m were tested, for the rill heights of 15 m, 20 m, 25 m and 30 m. The study concluded that the arches assisted in reducing the ground convergence in the production drift. The results also showed that the total height of the rill bench yields regardless of its height. After the yielding, the rockmass can no longer support itself and caves under its own weight. The larger the rill height, the larger the volume of loose rock that has to be supported and thus, higher the convergence. Furthermore, it was also observed that, significant amount of convergence in the production drift occurred during the drifting of the top drive and less during the stoping of the rill bench. This indicates that, the timely installation of the arches is an important criterion for their performance.