Controlling the process of explosive destruction of rocks in order to minimize dust formation and improve quality of rock mass

Tverda, Oksana; Plyatsuk, Leonid; Repin, Mykola; Tkachuk, Kostiantyn

doi:10.15587/1729-4061.2018.133743

Cited by 2 publications

(3 citation statements)

References 2 publications

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“…In addition, such stemming must be taken into account when choosing a rational type of explosive for blasting under specific mining and geological conditions. With the implementation of the proposed stemming design in combination with the resourcesaving design of the charge [31], it is possible not only to avoid or minimise the tax on pollutant emissions, but also to increase the efficiency of explosion and prevent mineral losses.…”

Section: Gas Formed During the Destruction Of Rocks By Explosivementioning

confidence: 99%

Gas-Neutralizing and Dust-Suppressing Stemming of Borehole Charges for Increasing the Environmental Safety of Explosion

Tverda

Кофанова

Кофанов

et al. 2021

Latvian Journal of Physics and Technical Sciences

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The problem of environmental pollution during the explosive destruction of rocks in order to extract minerals is solved in the article. Two types of borehole charge stemming design have been developed, which, in addition to the function of locking the products of the explosion, allow completely neutralizing harmful gases. The first type is the stemming design, which includes the two-stage purification of harmful gases, formed during the explosive destruction of rocks, and is based on chemisorption of gases by quicklime or production waste and physicochemical sorption (adsorption) by zeolites. Such stemming can provide complete chemical neutralization of NO2 and CO2, as well as neutralization of CO by zeolites, during the explosion. The second type is stemming design, which includes chemisorption of gases by slaked lime. This type of stemming has a number of advantages over the previous one. It can not only provide complete chemical neutralization of NO2, CO2 and CO, but also allows abandoning zeolites, which significantly reduces the cost of its formation to obtain the effect of “irrigation” of the dust and gas cloud, which reduces the concentration of dust in the air after the explosion to provide a higher degree of conversion. The paper determines quantitative and qualitative characteristics of the adsorbent composition of the two types of stemming depending on the type of explosive, the amount and type of harmful gases formed during explosion, and the parameters of the borehole.

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Section: Gas Formed During the Destruction Of Rocks By Explosivementioning

confidence: 99%

Gas-Neutralizing and Dust-Suppressing Stemming of Borehole Charges for Increasing the Environmental Safety of Explosion

Tverda

Кофанова

Кофанов

et al. 2021

Latvian Journal of Physics and Technical Sciences

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“…It is proposed to calculate the pressure peaks in the zone close to the charge during the explosion (for each filler of the gap between the charge and the borehole wall) on the basis of an adapted model of G. Lyakhov [25].…”

Section: Figure 2 the Re-grinding Zone Formed By Blasting A Continuous Charge (A) And A Charge With An Annular Gap (B): 1 -Explosive Charmentioning

confidence: 99%

“…An attempt has been made in [25] to solve this problem. The authors have been established the regularity of the passage of pressure waves during the explosion, depending on the acoustic stiffness of the filler of gap between the charge and the wall of the borehole and its magnitude.…”

Section: Introductionmentioning

confidence: 99%

A resource efficient and environmentally safe charge structure for mining in an open-pit

Tverda¹,

Кофанова²,

Repin³

et al. 2021

Min. miner. depos.

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Purpose. The purpose is to reduce mineral losses during the explosive destruction of rocks and environmental pollution by harmful gases and fine particulate matter. Methods. To achieve the objectives of the study, methods of physicochemical analysis and mechanics of continuous media have been used. The method of physico-chemical analysis has been used to determine the quantitative and qualitative characteristics of the composition of the well stemming depending on the parameters of the well, the type of explosive, the amount and type of harmful gases formed during the explosion. Methods of solid medium mechanics have been used to establish the patterns of pressure waves during an explosion depending on the characteristics of the gap filler between the charge and the well wall. To solve the problem of the behavior of a two-layer medium during the loading of a cylindrical cavity by a nonstationary load, a numerical method based on the finite-difference McCormack predictor-corrector scheme has been used. Findings. A resource-saving and environmentally friendly charge structure for rock mining by explosion was developed. The design of the charge involves the formation of a gap between the charge and the wall of the borehole, and filling it with a suspension of calcium hydroxide or a suspension of calcium carbonate. Originality. SThe dependences of the volume of harmful gases (NO2, CO2, CO) formed during the explosive destruction of rocks and the magnitude of the pressure peak in the area close to the charge on the chemical composition of the filler of the radial gap between the charge and the well wall have been set. Practical implications. Developed charge design allows to neutralize the harmful gases formed during the explosion, to reduce the pressure peak in the area of the rock massif close to the charge, and can be widely used in non-metallic quarries that extract minerals for the production of crushed stone.

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Controlling the process of explosive destruction of rocks in order to minimize dust formation and improve quality of rock mass

Cited by 2 publications

References 2 publications

Gas-Neutralizing and Dust-Suppressing Stemming of Borehole Charges for Increasing the Environmental Safety of Explosion

Gas-Neutralizing and Dust-Suppressing Stemming of Borehole Charges for Increasing the Environmental Safety of Explosion

A resource efficient and environmentally safe charge structure for mining in an open-pit

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