Deformation and Failure of the Salt Rocks During Relieving

Laptev, B.V.; Cjsc, Stc «Industrial Safety»

doi:10.24000/0409-2961-2018-4-58-60

Cited by 2 publications

(4 citation statements)

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“…In the dry method, plugging the mine shafts is exclusively performed to thwart water inflows into the worked-out area of the mine. However, when faced with the risk of an emergency groundwater influx into a salt or potash mine, the wet controlled closure method is deemed more reliable to diminish the degree of pillar dissolution and the potential for failures [2]. The essence of this method involves pre-filling the worked-out area of the mine, followed by the introduction of saturated brine through specialized pipelines.…”

Section: Introductionmentioning

confidence: 99%

“…Emergency closure of potash and salt mines arises from abrupt breakthroughs of fresh groundwater into mine workings through the water-protective layer [2]. The primary cause of such breakthroughs is the insufficient thickness of the water-protective layer considering the adopted mining parameters [3].…”

Section: Introductionmentioning

confidence: 99%

“…Uncontrolled flooding of a salt or potash mine typically results in the depletion of mineral reserves and various environmental issues [4][5][6]. 2 Many researchers have analyzed real cases of flooding in potash mines, often involving emergency situations. For instance, Gendzwill and Martin [7] provided a practical example of emergency flooding in a potash mine near Saskatoon, Saskatchewan.…”

Section: Introductionmentioning

confidence: 99%

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Modeling and Mitigating Gas Hazards during Potash Mine Closure

Kolesov,

Semin,

Starikov

et al. 2024

Preprint

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The planned closure of potash mines, achieved through the injection of highly mineralized brines into the worked-out area, is a complex and not fully studied process. A critical concern arises when brines obstruct the aerodynamic connections between the flooded mine's airspace and the atmosphere, potentially leading to the formation of closed cavities where explosive gases can accumulate. To address this hazard, it is imperative to develop systems capable of extracting the gas-air mixture from the unflooded domed portions of the worked-out area. This is the focus of this study, in which we analyze gas-dynamic processes within the potassium mine worked-out area during planned flooding. Two distinct scenarios are examined: the first involves controlled flooding with saturated brines, while the second contemplates flooding resulting from a hypothetical breakthrough of supra-salt strata, leading to the ingress of groundwater into the worked-out area. A novel mathematical model is introduced to predict the evolution of gas-air mixture parameters in the unflooded dome segment of the worked-out area. Utilizing this model, we assess the effectiveness of proposed measures designed to eliminate explosive gases from the worked-out area. Specifically, a pipeline system is proposed for the removal of gases, followed by their dilution below the maximum permissible concentrations in the effluent jet. The findings from this study contribute valuable insights into ensuring the safe and efficient closure of potash mines, shedding light on potential risks and effective mitigation strategies for gas-related hazards during planned flooding.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%