Substantiating rational parameters of a method for shrinkage ore stoping while developing thin-vein steeply inclined deposits

Abstract

Objective of the paper is to substantiate rational ore-stoping technique while using small wells in the context of thin-vein steeply inclined deposit mining. The technique is based upon the repeated field studies and simulation of ore drawing processes for shrinkage ore stoping in terms of the oriented drilling of periphery holes. A design of a blast-hole charge with low-density porous intermediate layer has been proposed as a result as well as a mechanism of shock-wave propagation within rock mass in the process of thin steeply inclined vein stoping. Scientific novelty is represented by means of analytical results of scientific sources, and dependences of ore losses on the vein wall hypsometry resulting from shrinkage stoping in the context of the technique being proposed. Practical relevance is to substantiate rational parameters of the ore-stoping technique being proposed. The technique involves designs of blast-hole charges with low-density porous intermediate layer in stemming. Moreover, the technique proposes to place the intermediate low-density stemming layer right after a blast hole was charged with explosives and live primers were inserted.

Simulation of Leaching Processes of Polymetallic Ores Using the Similarity Theorem

“…Drilling and blasting are an important part of the mine planning and management and widely adopted techniques for overburden removal and ore excavation (Shcherbakov et al, 2021; Serdaliyev and Iskakov, 2022). One of the drilling methods was proposed by the scientists of Dnipro University of Technology (Dudlia et al, 2018;Shyrin et al, 2018). Water control was also justified (Caceres and Alca, 2016;Bazaluk et al, 2021;Rudakov and Westermann, 2021).…”

Bench studies of the process of transporting an inverse gravel filter of block type along the well

“…There is also stratification of the gravel material in size, both in height and in diameter of the formed gravel bedding. Suspension of gravel material on the transporting route with the effect of corking, which requires additional time for its elimination, can be observed accompanied with the risk of formation of gaping cavities opposite the aquifer, which causes well sanding [8][9][10][11].…”

A new method of oil and water well completion involving the implosion effect

“…Ivano-Frankivsk National Technical University of Oil and Gas (Ivano-Frankivsk, Ukraine), K. I. Satbaev Kazakh National Research Technical University (Almaty, Kazakhstan), Dnipro University of Technology (Dnipro, Ukraine), and Oles Honchar Dnipro National University (Dnipro, Ukraine) have rich experience and long-standing cooperation in scientific research and development works. Over the past decades, effective designs of tools for drilling medium-and high-hardness rock have been developed [1][2][3][4]; rational layouts of casing and drill strings have been substantiated [5][6][7][8][9][10]; innovative backfill materials have been developed [11,12] along with drilling fluids and technologies for their application [13,14] and gas hydrate production technologies [15].…”