The progressive failure mechanism for coal pillars under the coupling of mining stress and water immersion in underground reservoirs

Wang, Fangtian; Wei, Xueqian; Shao, Dongliang; Chen, Jianhang

doi:10.1007/s10064-023-03151-1

Cited by 7 publications

(2 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, it is essential to calculate the storage capacity of these reservoirs. Water storage capacity refers to the series of storage spaces, such as voids or fractures, formed after the upper strata of the mining area are destroyed [35][36][37][38], with some authors calculating the storage capacity based on the storage water level at different positions in the overlying fracture zone. Pang et al [39] proposed a theory of storage space for underground water reservoirs in coal mines with different rock formations.…”

Section: Introductionmentioning

confidence: 99%

Research on the Capacity of Underground Reservoirs in Coal Mines to Protect the Groundwater Resources: A Case of Zhangshuanglou Coal Mine in Xuzhou, China

Zhang

Luo

et al. 2023

Water

View full text Add to dashboard Cite

This study analyzes the ability of coal mine underground reservoirs to protect groundwater resources. As the demand for coal mining continues to increase, the potential impact on groundwater resources around mines has become a growing problem. Underground water reservoirs, also known as coal mine underground reservoirs, have been constructed as a solution to protect water wastage in mining operations. However, there is a lack of awareness related to the ability of underground water reservoirs in mines to protect groundwater resources. In this study, we used FLAC3D software to analyze the formation process, water storage volume, and central storage location of the underground water reservoir in Zhangshuanglou Coal Mine. The results show that the damaged volume is 3.39 × 106 m3, and the groundwater resources that can be protected by coal mine underground reservoirs in the study area amount to 1.98 × 105 m3. We found that the storage capacity of underground reservoirs is more significantly affected by the extent of mining, which can be expressed as y = 49,056.44 + 255.75x + 1.46x2 (R2 = 0.995) (x ≠ 0). Additionally, the water storage location obtained through simulation can provide a reference for the construction of underground reservoir regulation and water storage projects. The results of the water quality analysis indicate that the concentrations of SO42− decreased by 42% with the closure of the mining area, and the pH also gradually converged to neutral. This highlights the significant role of underground water reservoirs in coal mines in promoting green production and protecting water resources and the environment.

show abstract

Section: Introductionmentioning

confidence: 99%

Research on the Capacity of Underground Reservoirs in Coal Mines to Protect the Groundwater Resources: A Case of Zhangshuanglou Coal Mine in Xuzhou, China

Zhang

Luo

et al. 2023

Water

View full text Add to dashboard Cite

show abstract

“…There are many shallow coal seams with simple geological structure in Western China. With the depletion of coal resources in eastern China, the coal mining intensity in the eastern mining area is gradually increasing, and the number of abandoned mines is increasing (Ning et al 2017; Wang et al 2023).…”

Section: Introductionmentioning

confidence: 99%

Creep behavior of dry and saturated medium-grain sandstone and its relationship with short-term mechanical properties

Gu,

Tan,

Zhao

et al. 2023

Preprint

View full text Add to dashboard Cite

With the continuous exploitation of coal and the increase of abandoned goafs under weakly cemented aquifer strata in Western China, the study of the time dependent mechanical properties of the unique weakly cemented medium-grain sandstone, which is susceptible to water, is imminent. In this paper, creep mechanical properties of dry and saturated medium-grain sandstone, which represent two limit states affected by water, were studied and compared. The results showed that water greatly weakens the compressive resistance of medium-grained sandstone, but balances the volumetric compressive deformation by filling in the internal defects of rock samples with different confining pressures. The rock showed a state of volume expansion except for the first or second loading stage. Compared with short-term compressive strength, the turning point of saturated rock from viscoelasticity to viscoplasticity is earlier than that of dry rock. The short-term elastic modulus has a negative exponential relationship with deviating stress, and creep rate has a positive exponential relationship with deviating stress. Based on Burges model with exponential damage variables, the method of obtaining creep model parameters by short-term mechanical parameters of rocks was introduced, and the linear relationship between elastic modulus of medium-grained sandstone and parameters of Burgers model with damage was found. This conclusion will enrich the framework of the above-mentioned methods for obtaining time-dependent properties.

show abstract

Effects of Moisture Content and Loading Rate on Coal Samples: Mechanical Properties and Failure Mechanisms

Wang,

Ju,

et al. 2024

Rock Mech Rock Eng

View full text Add to dashboard Cite

The progressive failure mechanism for coal pillars under the coupling of mining stress and water immersion in underground reservoirs

Cited by 7 publications

References 34 publications

Research on the Capacity of Underground Reservoirs in Coal Mines to Protect the Groundwater Resources: A Case of Zhangshuanglou Coal Mine in Xuzhou, China

Research on the Capacity of Underground Reservoirs in Coal Mines to Protect the Groundwater Resources: A Case of Zhangshuanglou Coal Mine in Xuzhou, China

Creep behavior of dry and saturated medium-grain sandstone and its relationship with short-term mechanical properties

Effects of Moisture Content and Loading Rate on Coal Samples: Mechanical Properties and Failure Mechanisms

Contact Info

Product

Resources

About