Investigating the Usability of Pyrotechnic Rock Breaker Materials in Natural Stone Quarrying

Güneş, Alime; Demirdag, S.; Demirbas, E. O.; Uner, C. O.

doi:10.1134/s1062739122060126

Cited by 3 publications

(1 citation statement)

References 14 publications

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“…As mining depth increases, the area of the surface subsidence expands. During a flood season, downhole debris flow accidents easily occur in the mine because of a covering layer of debris (moraine) several tens of meters thick on the surface of the stope, which mixes with rainwater and flows down the stope through various channels [1][2][3]. Between 2019 and 2022, more than 10 downhole debris flow accidents occurred in the mine.…”

Section: Introductionmentioning

confidence: 99%

Study on the Prevention and Control of Downhole Debris Flows Based on Disaster Chain Theory

Niu

Hou

Sun

2023

Water

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The occurrence of downhole debris flows in caving mines has burst, concealment, and destruction characteristics. This study aimed to investigate accurate prevention and control measures for downhole debris flows. The research background was a downhole debris flow in the Plan copper mine. The disaster chain theory was applied to study prevention and control methods for downhole debris flows. Using a model of source generation, chain breaking, and disaster reduction, we proposed accurate prevention and control measures for downhole debris flow disasters, which prevent and control the downhole debris flows at the source. The results showed that the disaster chain type of downhole debris flow disasters is the compound periodic cycle chain, which has the characteristics of the branch basin chain and the periodic cycle chain. Based on the chain-effect nature of disasters caused by downhole debris flows, active and passive prevention and control methods for downhole debris flow disasters were proposed. The active prevention and control measures for chain breaking and disaster reduction involve isolating the generation conditions from the source, inducing a downhole debris flow disaster. This prevention and control method is difficult to implement during the actual production process. The idea of disaster reduction through passive defensive chain breaking is based on the fact that if the three essential types of conditions for the downhole debris flow formation are not present at the same time, then a disaster accident of a downhole debris flow can be effectively prevented and controlled. Accordingly, the following measures are proposed for preventing and controlling downhole debris flows: (1) reinforcement measures applied to the slope body of the landslide material source in the collapse pit; (2) adopting comprehensive flood control measures such as locking, intercepting, dispersing, draining, and blocking under hydraulic conditions; (3) blocking the formation of the channel by adjusting the ore drawing conditions; (4) addressing the inducing factors by blasting with a small amount of explosive. According to the disaster chain theory, prevention, and control methods for downhole debris flow in caving mines were investigated in this study, which not only broadens the research of the debris flows but also fills the gap in the systematic research on downhole debris flows.

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Section: Introductionmentioning

confidence: 99%

Study on the Prevention and Control of Downhole Debris Flows Based on Disaster Chain Theory

Niu

Hou

Sun

2023

Water

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Study on the Effect of Ore-Drawing Shear Factor on Underground Debris Flow in the Block Caving Method

Niu,

Zhe,

Sun

et al. 2023

Water

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The shear factor of ore drawing is an important factor affecting the formation of underground debris flows. The aim of this study was to investigate the effect of the mining shear factor on underground debris flows in natural caving. The research background was the underground debris flow in the Plan copper mine, and we analyzed the characteristics of the slurry material structure of the underground debris flow, as well as the influence of the ore-drawing shear factor on the formation mechanism of the underground debris flow. The results showed that the slurry of the underground debris flow in the Plan mine is both a pseudoplastic and thixotropic fluid. Shearing force induced in drawing deforms the slurry and decreases its viscosity with the increase in shear rate and time. The shear force produced by the flow of ore particles first produces shear action on the paste in the shear boundary region of the ore drawing, reducing the paste viscosity while increasing its fluidity. Consequently, the “activation” makes the paste flowable, which flows along with the bulk ore flowing through the drawing mouth. The continuous ore-drawing process continuously shears the new moraine slurry in the ore-drawing channel and continuously “activates” the moraine slurry in the ore-drawing channel. Finally, destructive underground debris flow accident of a certain scale occurs. To our knowledge, this study thoroughly investigated the effect of the ore-drawing shear factor on the formation mechanism of underground debris flows, which not only broadens the research field of debris flow but also covers the deficiency of systematic research on underground debris flows, providing theoretical guidance for the prevention and control of underground debris flows.

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Doğaltaş Ocaklarında Kullanılan Ayırma/Gevşetme Yöntemlerinin AHP ile Karşılaştırılması

AHMADI,

KARAABAT VAROL,

DEMİRDAĞ

2024

Teknik Bilimler Dergisi

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Türkiye’ de doğal taş üretimi ihracat açısından önemlidir. Bu nedenle doğal taş ocaklarında üretilen blokların ve bloklardan elde edilen plaka/levhaların ekonomik değere sahip boyut ve kalitede olmasına dikkat edilmektedir. Blok üretimi sırasında uygulanan işlemler, hazırlık, kesme/ayırma, sayalama, taşıma ve stoklama işlemlerinden oluşmaktadır. Bu çalışmada ekonomik değer taşıyan bloklara ulaşmak için yaygın olarak kullanılan ayırma/gevşetme yöntemlerinden hidrolik kırıcılar, piroteknik kaya kırıcılar, genleşme harçları ve geleneksel patlayıcılar incelenerek en uygun yöntem tanımlanmaya çalışılmıştır. Bu yöntemler; fiyat, zaman, atık malzeme, ticari blok kalitesi, çevresel etkiler ve güvenlik kriterleri açısından Çok Kriterli Karar Verme Yöntemlerinden biri olan AHP yöntemi ile karşılaştırılmıştır. Bu karşılaştırma sonucunda piroteknik kaya kırıcılar ile ayırma/gevşetme yönteminin en uygun yöntem olduğu sonucuna varılmıştır

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Investigating the Usability of Pyrotechnic Rock Breaker Materials in Natural Stone Quarrying

Cited by 3 publications

References 14 publications

Study on the Prevention and Control of Downhole Debris Flows Based on Disaster Chain Theory

Study on the Prevention and Control of Downhole Debris Flows Based on Disaster Chain Theory

Study on the Effect of Ore-Drawing Shear Factor on Underground Debris Flow in the Block Caving Method

Doğaltaş Ocaklarında Kullanılan Ayırma/Gevşetme Yöntemlerinin AHP ile Karşılaştırılması

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