In the intricate world of underground mining, precision is paramount, especially when it comes to surveying reference networks that form the backbone of all underground measurements. A recent study led by Valentyn Nazarenko from the Technical University «Metinvest Polytechnic» LLC has unveiled significant insights into the angular measurement errors that can accumulate in these critical surveying processes. The findings, published in the journal ‘Технічна інженерія’ (translated as ‘Technical Engineering’), highlight the challenges faced by surveyors in maintaining accuracy amidst the unique constraints of underground environments.
Nazarenko’s research delves into the nuances of polygonometric courses, which are typically laid along capital and main mine workings. These courses rely on the measurement of horizontal and vertical angles, as well as the lengths of course sides. However, the study reveals that each measurement is susceptible to error, leading to a cascade of inaccuracies as one moves further from the starting point. “The forced configuration of underground polygonometric courses, combined with limited starting points, makes it easier for errors to accumulate quickly,” said Nazarenko.
The implications for the construction sector are profound. With the accuracy of measurements in these underground networks characterized by a mean square error of 20 seconds for horizontal angles and 30 seconds for vertical angles, the research calls into question the effectiveness of current surveying practices. The recommended use of theodolites with a minimum accuracy of 15 seconds does not suffice for achieving the desired precision, particularly when measuring angles in tight, inclined spaces. Nazarenko emphasizes that “using T15 type theodolites to measure angles with sides up to 20 meters requires automatic centering to ensure accuracy.”
This study not only sheds light on the technical challenges but also presents an opportunity for innovation within the construction industry. By refining measurement techniques and employing advanced technology, companies can enhance the reliability of their underground surveying operations. As the industry moves towards more automated and precise methods, the potential for reducing costs and improving safety in mining operations becomes increasingly apparent.
The research provides charts and methodologies for centering and measuring angles, which could serve as a valuable resource for surveyors aiming to enhance their practices. As Nazarenko’s findings circulate within the industry, they may pave the way for new standards and technologies that prioritize accuracy in underground surveying, ultimately translating into more efficient and safer mining operations.
For those interested in exploring these findings further, the full study can be accessed through the Technical University «Metinvest Polytechnic» LLC’s website at metinvestpolytechnic.edu.ua. The insights presented in this research are poised to influence the future of underground surveying, ensuring that as the construction sector evolves, it does so with a foundation of precision and reliability.
