INVESTIGATION OF THE INFLUENCE OF THE CHEMICAL COMPOSITION OF MINE WATERS FOR THE MANUFACTURE OF A BOREHOLE FROM HYDROGEL DURING ROADHEADING OPERATIONS BY DRILLING AND BLASTING METHOD

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INVESTIGATION OF THE INFLUENCE OF THE CHEMICAL COMPOSITION OF MINE WATERS FOR THE MANUFACTURE OF A BOREHOLE FROM HYDROGEL DURING ROADHEADING OPERATIONS BY DRILLING AND BLASTING METHOD

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One of the factors determining the conditions and the effectiveness of the explosion of borehole charges is the internal borehole stemming. Its size and quality largely determine the blast hole efficiency ratio (BER), the uniformity of crushing of the array, as well as the amount of dust and toxic gases entering the mine atmosphere during an explosion. The purpose of the study was to study the influence of the chemical composition of mine waters and ambient temperature, as well as various parameters on the time of manufacture of a hydrogel stemming for boreholes. The experiments were carried out under different temperature conditions and in different ratios of water: hydrogel for determining the swelling time of the hydrogel. As a result of the study, the influence of ambient temperature in the range from 5 ° C to 30 ° C and the chemical composition of water on the swelling rate was determined for the first time. During the study, the following features were identified: hydrogel granules of less than 1 mm are connected to each other and come to a ready state for use as a stemming; the influence of temperature and water properties that affect the rate of hydrogel swelling is investigated; the rational ratio of hydrogel and water that can be used as a cull is determined. According to the results of experiments, it was found that, except for fractions larger than 1 mm, they do not combine into one whole mass. And hydrogel granules with dimensions < 1.0 mm are combined and come to a ready state (combined into one whole mass), and this allows the use of waste hydrogel granules for the manufacture of a stemming and with this improves the quality of the produced hydrogel for agricultural needs

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# stemming# temperature# borehole# swelling# hydrogel# drilling and blasting operations# water rigidity# water pH

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ROI:

https://eroi.uz/11.0008/A0922-0057

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