Some Aspects Of Using Goafs For Locating Post-Flotation Waste In LGOM Mines

• Published in: Archives of mining sciences = Archiwum górnictwa Vol. 60; no. 4; pp. 941 - 954
• Main Authors: Mazurkiewicz, Maciej, Popiołek, Edward, Niedojadło, Zygmunt, Sopata, Paweł, Stoch, Tomasz
• Format: Journal Article
• Language: English
• Published: Warsaw De Gruyter Open 01.12.2015; Polish Academy of Sciences
• Subjects: location of waste; lokowanie odpadów; obniżenia terenu; post-mining goafs; pustki w górotworze; subsidence; voids in the rock mass; zroby poeksploatacyjne
• DOI: 10.1515/amsc-2015-0062
• ISSN: 1689-0469; 0860-7001

As a result of mining of deposits of mineral raw materials, spaces are formed in the rock mass, which get partially filled with roof rocks or by the backfill, most often sand. However, some voids remain in the rock mass, and can be used as a place to locate waste. The thesis analyses systems and operating conditions of mining deposits, in terms of the possible existence of spaces for filling in the LGOM mines. It was determined that the most probable option is to use goafs after mining the ore with a thickness of over 3 m in the last 5 years, with the systems of roof deflection and their partial lifting. Quantitative evaluation of the voids is based on the comparison of the subsidence over the extraction field and the volume of the extracted deposit. It has been proved that the existing voids provide the possibility of locating approximately 8 million m of waste in goafs. It is highly possible to locate further 11 million m of waste after obtaining positive results of the practical location of them and gaining relevant experience. The goafs after mining with hydraulic filling, goafs in the deposit of the thickness of up to 2 m and mined more than 20 years ago were recognized as useless for locating waste.