Mineral raw materials for engineering works
Mineral raw materials for engineering works are usually clayey-sandy and clayey rocks, but also others - sandstones and limestones which do not fulfill the criteria necessary for dimension and crushed stones. These raw materials are utilized in road industry for road embankments building or in waste disposal packing and reclamation. Clayey rocks can be also used for packing and reclamation of waste disposals, for hydro-building and other purposes.
Usually (about 70%) resources of mineral raw materials for engineering works are documented as accompanying raw material - these are the parts of deposits which do not meet the balancing criterias of the main raw material, i.e. parts of sand and gravel deposits with too high ash content or parts of dimension and crushed stones deposits with too low strength.
Anticipated economic resources amounted to 9.20 million m3 in 2015 and decreased by 0.288 million m3 (3%) in comparison with the previous year.
There were five new deposits documented in 2015 (resources grew by 256 thousand m3): Kozów I (166 thousand m3) in Dolnośląskie Voivodeship, Borów IV (15 thousand m3) in Lubelskie Voivodeship, Biecz-Zakole (14 thousand m3), Łysaków-Walas I (30 thousand m3), Wyżne-Podwiszówka (31 thousand m3) in Podkarpackie Voivodeship.
There was a new documentation with recalculated resources for Gniewczyna Tryniecka deposit approved (-75 thousand m3).
Two deposits were crossed out from "The balance…” – Dębnica deposit (Dolnośląskie Voivodeship) and Wyżne-2 deposit (Podkarpackie Voivodeship). Dębnica deposit was documented in 2014 but due to the lack of demand the investor applicated for resources deletion (432 thousand m3). Wyżne-2 deposit has been depleted (remaining resources amounted to 3 thousand m3).
The table given below shows the current state of identification and management of mineral raw materials for engineering works resources in Poland.
Production of mineral raw materials for engineering works amounted to 0.034 million m3 in 2015 and decreased significantly in comparison with the previous year (by 45.9%) (table 2). It constituted only 6.2% of the 2012 production. In all of exploited deposits the raw material for engineering works is only co-occurring and the main raw materials are sands and gravel or dimension and crushed stones.
Economic resources were calculated for 10 deposits and amounted to 4.408 million m3 which accounts for 88.8% of anticipated economic and subeconomic resources.
Prepared by: Wojciech Szczygielski