Mining-induced movement properties and fissure time-space evolution law in overlying strata

Xu, Xingliang; Zhang, Nong; Tian, Suchuan

doi:10.1016/j.ijmst.2012.12.011

Cited by 26 publications

(12 citation statements)

References 1 publication

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“…11 The density indicates the complexity of the network. 12 The transitivity is the entire clustering coefficient. 13 Connectedness is one of the most important measurements for summarizing hierarchical structures.…”

Section: Effects Of Coal Mining Cracks On the Topological Properties mentioning

confidence: 99%

“…Mining activities have damaged the surface ecosystem [6]. Coal mining cracks (or fissures) represent an important type of coal mining disturbance that occurs during the mining process, especially in the fragile ecosystem of the Loess Plateau [11][12][13][14][15]. Under the triple pressure of harder soils, water deficiency, and high-intensity underground coal mining, cracks are more easily formed with different depths and widths [16,17].…”

Section: Introductionmentioning

confidence: 99%

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Cracks Reinforce the Interactions among Soil Bacterial Communities in the Coal Mining Area of Loess Plateau, China

Luo

Chen

et al. 2019

IJERPH

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Soil microorganisms play a key role in global biogeochemical changes. To understand the interactions among soil bacterial communities and their responses to extreme environments, the soil properties and bacterial community diversity were determined in the post-mining ecosystem of the Loess Plateau, China. The results showed that the soil temperature, pH, organic matter, available phosphorus, and available potassium values were significantly reduced in the post-mining cracks area. However, the richness and uniformity of soil bacterial communities increased by about 50% in the post-mining cracks area. Soil microbial community structure and the network interactions tended to be complex and strengthened in the post-mining cracks area. Moreover, soil nutrient loss caused the differences in soil bacterial community structure compositions in the post-mining cracks area. Furthermore, the relationships between soil physicochemical properties and different modules of the soil bacterial molecular ecological network were changed in a complex manner in the post-mining cracks area. This study provides a theoretical basis for adaptive management and response to cracks in post-mining areas and under other extreme conditions.

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Section: Effects Of Coal Mining Cracks On the Topological Properties mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cracks Reinforce the Interactions among Soil Bacterial Communities in the Coal Mining Area of Loess Plateau, China

Luo

Chen

et al. 2019

IJERPH

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“…Meanwhile, the size of reserved coal pillars also affects the development of an overburden fractured zone. Under the different coal pillar conditions, the fracture structure of the basic roof and the resulting fracture development zone demonstrate different evolution laws …”

Section: Introductionmentioning

confidence: 99%

“…Under the different coal pillar conditions, the fracture structure of the basic roof and the resulting fracture development zone demonstrate different evolution laws. 23 The damage degree of the overlying strata can directly affect the occurrence of coal mine disasters. 24,25 The large intact hard overlying strata can easily cause violent mining pressure in the working face, which may result in the occurrence of rock and coal burst, while the fragmented overlying strata may easily cause the water inrush accident.…”

Section: Introductionmentioning

confidence: 99%

Development characteristics and field detection of overburden fracture zone in multiseam mining: A case study

Tian

Liu

Yang

et al. 2019

Energy Science & Engineering

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During the multiseam mining process, the overlying strata were damaged due to different mining disturbances, where a large number of fractures were produced which were the main seepage paths of gas and water, easy to cause gas or water inrush accidents. Thus, it is necessary to explore the development characteristics of the fractured zone in the overlying strata from multiseam mining. In this paper, laboratory triaxial compression tests were firstly conducted on the rock specimens subjected to different mining disturbances. In these tests, the specimen was loaded to different stress before a regular test to simulate the different damage effects on the rock strata caused by different mining disturbances. And the corresponding values of m and s could be obtained through a calculation based on the test results. Subsequently, the numerical simulation was conducted to simulate the field situation, in which the m and s values were used in the numerical model combined with the Hoek‐Brown–modified criterion, and the results show that the overburden failure height was increased with the mining disturbances from 48 to 120 m, and then, the effects of mining height and interval thickness on the development height of fracture zone were studied by numerical simulation. Finally, the leakage of roof drilling at different stages was tested and calculated in the field. The results showed that the loss of leakage drilling can directly reflect the development degree of roof cracks, and the detection results were close to the development height of the numerical simulation fracture zone. It is verified that the simulation method used in this paper is feasible and can be used as a reference for similar research.

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“…Xu et al. ( 2012 ) studied the mining-induced deformation of overlying strata and the time–space evolution law of fissures by the methods of field measurement and physical simulation. Wang et al.…”

Section: Introductionmentioning

confidence: 99%

Predicting the distribution of ground fissures and water-conducted fissures induced by coal mining: a case study

Zhao

Mei

et al. 2016

SpringerPlus

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IntroductionThe use of Top Coal Caving for exploiting the thick coal seam with shallow buried depth most likely has a strong negative impact on the stability.Case descriptionAnjialing No. 1 Underground Mine is located in Shuozhou City, Shanxi Province of China. The 4# Coal Seam of this coal mine is the thick coal seam with shallow buried depth, which has the thickness of 12 m and the depth of 180 m in average. This paper focuses on predicting the distribution of ground fissures and water-conducted fissures induced by the exploiting of the 4# Coal Seam.Discussion and evaluationWe first create a 3D computational model, and then use FLAC software to simulate the mining of coal seam. We then calculate the displacements and tensile strain of the ground surface and strata, and predict the distribution of the ground fissures and water-conducted fissures. Finally, we further analyze the possibility of the perviousness and air leakage of the coal mine on the basis of the predicted distribution of fissures.ConclusionsThe prediction results indicate that: (1) the water-conducted fissures are strongly developed and go through the Neogene aquifuge in some region; thus, it may lead to potential perviousness of coal mine; (2) part of these water-conducted fissures connect with the ground fissures; and this behavior may cause the risk of air leakage.

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Mining-induced movement properties and fissure time-space evolution law in overlying strata

Cited by 26 publications

References 1 publication

Cracks Reinforce the Interactions among Soil Bacterial Communities in the Coal Mining Area of Loess Plateau, China

Cracks Reinforce the Interactions among Soil Bacterial Communities in the Coal Mining Area of Loess Plateau, China

Development characteristics and field detection of overburden fracture zone in multiseam mining: A case study

Predicting the distribution of ground fissures and water-conducted fissures induced by coal mining: a case study

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