COMPREHENSIVE PROCESSING OF MINERAL RAW MATERIALS FROM COAL MINE WASTE DUMPS: PROPERTIES, VALUABLE PRODUCTS, AND RESOURCE ACCOUNTING SYSTEM

Objective. Experimental studies on the chemical and mineralogical composition of coal mine spoil heaps and the potential for processing them to obtain valuable mineral-raw materials. Development of an analytical tool for accounting and forecasting the resource potential of coal mine spoil heaps. Methods. To achieve the objective, X-ray fluorescence analysis, X-ray phase analysis, granulometric analysis, laboratory studies of mineral raw material enrichment using sieve fractionation and gravity separation, as well as analytical studies of spoil heap resource accounting were employed. Results. The chemical, mineralogical, and granulometric composition of spoil heaps from a coal mine in the Western Donbas region was investigated, enabling the identification of a processing strategy to obtain a range of products: coal concentrate, crushed stone mixture, sand fraction, and clay fraction. It was established that gravity separation of coarse fractions in a heavy medium created with clay slurry demonstrated high separation efficiency, yielding a significant low-ash coal fraction and a high-ash rock fraction. In contrast, spiral separator processing demonstrated significantly lower low-ash coal recovery. A technological processing scheme for spoil heaps to obtain a complex of valuable products was developed, and forecast indicators were evaluated. A methodological system for accounting the resource potential of a coal mine waste dump has been proposed in the form of an informational database. This system allows for tracking changes in the dumps structure, identifying zones of attractive resource accumulation for economic efficiency of processing operations in the long term. Scientific novelty. The use of clay suspension from washed spoil heaps to create a heavy medium for the beneficiation of coarse fractions allows for the recovery of up to 95% coal concentrate with 11% ash content, contributing to resource conservation. Practical significance. A technological scheme for obtaining a range of valuable products for the energy and construction industries has been developed. An analytical tool for resource potential accounting and calendar planning for spoil heap formation has been created, enabling operational identification of resource concentration zones within spoil heaps and their sections. Keywords: coal mine, spoil heap, valuable resource, chemical composition, mineralogical composition, granulometric composition, gravity separation, resource accounting.