Using Water Injection to Prevent Shaft Failure in the Jining No. 3 Coal Mine, China

Xu, Yong; Du, Mingze; Luo, Yaqi

doi:10.1007/s10230-018-00576-z

Cited by 8 publications

(5 citation statements)

References 9 publications

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“…To reduce the damage of the water injection water quality to the reservoir, Wang proposes a water quality decision‐making method considering the history of water injection 14 . Xu found that oscillating pressurized water injection or increasing the number of injection boreholes could be used to increase injection flow rates and prevent shaft failure 15 . Based on the hydrophobicity of coal, hydrophilic modification of the coal surface has been proposed via co‐deposition of polydopamine (PDA) and polyacrylamide (PAM) 16 .…”

Section: Introductionmentioning

confidence: 99%

“…14 Xu found that oscillating pressurized water injection or increasing the number of injection boreholes could be used to increase injection flow rates and prevent shaft failure. 15 Based on the hydrophobicity of coal, hydrophilic modification of the coal surface has been proposed via co-deposition of polydopamine (PDA) and polyacrylamide (PAM). 16 Chen proposes a new experimental method of monitoring the transmission range of coal seam water injection on the basis of acoustic emission array monitoring technology.…”

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confidence: 99%

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Study on the influence of water injection pressure on water absorption process and water injection effect of coal

et al. 2023

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Rock burst disasters can be reduced and prevented with the help of coal dust water injection. In this study, the high‐pressure water injection device is used to examine how the water absorption rate changes over time under various water injection pressures. The results reveal that the water absorption rate of coal samples increases quickly initially before slowing down with water absorption time. Its change can be described using the Langmuir equation. In addition, the Langmuir equation is utilized to demonstrate how water injection pressure affects the maximum water absorption of coal samples. The effects of experimental findings and numerical analysis are investigated on water injection pressure. The breadth and extent of coal bodies with increased moisture are continuously expanding at the same water injection pressure and water injection time. The water absorption of coal close to the borehole remains relatively unchanged with an increase in water injection pressure, but the water absorption range of coal in the vicinity increases. Therefore, raising the water injection pressure and duration will improve the effective range of water injection. © 2023 Society of Chemical Industry and John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Study on the influence of water injection pressure on water absorption process and water injection effect of coal

et al. 2023

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“…4 , 5 In recent years, some fire accidents, which were caused using polyurethane material to reinforce broken layers, have occurred in coal mines. 6 , 7 Therefore, research on the combustion of polyurethane and coal blends has become a new topic.…”

Section: Introductionmentioning

confidence: 99%

“…The mixture combines with the broken coal and rock and forms a strengthened gelatinous solid. During the injection of the mixture slurry, isocyanate and polyester polyol react violently and release a large amount of heat. , In recent years, some fire accidents, which were caused using polyurethane material to reinforce broken layers, have occurred in coal mines. , Therefore, research on the combustion of polyurethane and coal blends has become a new topic.…”

Section: Introductionmentioning

confidence: 99%

Kinetic and Synergetic Effect Analysis of the Co-Combustion of Coal Blended with Polyurethane Materials

et al. 2020

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The synergetic effects during the co-combustion of coal blended with polyurethane are researched by thermogravimetric experiments. The mixing ratio of polyurethane to coal affects the oxygen absorption and pyrolysis. According to the synergetic effects, the co-combustion process can be divided into three stages. In the first stage, the synergetic effects are notable and the main reactions are pyrolysis and oxygen absorption. In the second stage, there are almost no synergetic effects and the main reaction is combustion of fixed carbon. In the third stage, there are some synergetic effects because the combustion residues agglomerate. The synergetic effects during co-combustion are influenced by two factors, energy and free radicals. When the mixing ratio is lower than 1:15, the synergetic effects are expressed as inhibitory effects, and the pyrolysis of polyurethane competes with the oxygen absorption of coal. The calorific values of the samples are lower and their ignition temperature and activation energy in the early stage of co-combustion are higher than those of coal. When the mixing ratio is higher than 1:15, the synergetic effects expressed as promoting effects.

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“…Taking Jining No. 3 Coal Mine as an example, Xu et al [21] monitored the changes of water level and strain of the shaft wall during water injection and predicted the possible time of shaft wall fracture according to the monitoring results. Chai et al [22] used the fiber Bragg grating technology to monitor the subsidence of formation in the process of dewatering and water injection and studied the relationship between the subsidence of formation and shaft stability.…”

Section: Introductionmentioning

confidence: 99%

The Stability Evaluation of Shaft during Drastic Drawdown Dewatering of Alluvium

Duan

et al. 2019

Shock and Vibration

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The hydrophobicity of the aquifer at the bottom of the porous alluvium will affect the stability of the shaft. According to the changes of water level and the compressive amount of alluvium, we can evaluate the shaft stability and predict the shaft failure. In this work, the simulation model of the auxiliary shaft in the Zhuxianzhuang Coal Mine is generated by using the Nsdc software to evaluate the stability of the shaft during drastic drawdown dewatering. Based on the measured hydrophobic compression ratio in an adjacent coal mine, the compressive amounts of the strata near the main and auxiliary shafts in the Zhuxianzhuang Coal Mine are predicted under the condition of drastic drawdown dewatering, which will be 249.69 mm and 302.75 mm, respectively. It is more likely that the shaft wall may fracture in the 15th day (fourth load level) under the condition of drastic drawdown dewatering. The formation compressive amount near the auxiliary shaft is approximately 320 mm, which is close to the measured predicted value. At the same time, the Fisher discriminant model is established, and it is predicted that the state of the main and auxiliary shafts will be failure under the conditions of drastic drawdown dewatering in the Zhuxianzhuang Coal Mine. Based on the simulating results, the technical means of using the ground grouting for early prevention and control is proposed.

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Using Water Injection to Prevent Shaft Failure in the Jining No. 3 Coal Mine, China

Cited by 8 publications

References 9 publications

Study on the influence of water injection pressure on water absorption process and water injection effect of coal

Study on the influence of water injection pressure on water absorption process and water injection effect of coal

Kinetic and Synergetic Effect Analysis of the Co-Combustion of Coal Blended with Polyurethane Materials

The Stability Evaluation of Shaft during Drastic Drawdown Dewatering of Alluvium

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