A Study on the Formation Mechanism and Preventive Measures of Coal-Mining Ground Fissures in the South-West of Pingyao

Zhou, Chang Song; Zheng, Xiu Qing; Li, Zheng; Wei, Xiao

doi:10.4028/www.scientific.net/amm.90-93.1341

Cited by 3 publications

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“…The morphological characteristics of ground fissures in a dump are also unique, and ground fissures are distributed in front of the platform of a dump; most are linear, arcing and polygonal. Similar conclusions were drawn by Zhou et al (2011). Ground fissures have no obvious frame structures.…”

Section: Morphological Characteristics Of Ground Fissuressupporting

confidence: 84%

“…Ground fissures formed by natural soils, such as paddy soil, expansive soil and clay, are affected by soil texture (Gray & Allbrook, 2002), soil alternating drying and wetting (Zhang et al, 2013), freeze and thaw action (Maloof, Kellogg & Anders, 2002), and tillage methods (Bandyopadhyay et al, 2003). However, the formation and development of ground fissures in a dump is also mainly affected by the gravity of the soil, uneven subsidence and rainfall characteristics (Li et al, 2018;Zhang et al, 2012;Zhou et al, 2011). Therefore, the formation mechanism of ground fissures in a dump is different from that of natural ground fissures.…”

Section: Morphological Characteristics Of Ground Fissuresmentioning

confidence: 99%

“…In summary, studies of soil fissures in coal mining areas are mostly concentrated in subsidence areas, while few studies have focused on ground fissures in dump areas. Zhou et al (2011) pointed out that rainfall and groundwater discharge was important factors for the formation and development of ground fissure. Wang et al (2012) carried out that ground fissure were the precursor of landslide or debris flow hazard in the dump area.…”

Section: Introductionmentioning

confidence: 99%

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Determining the influencing factors of preferential flow in ground fissures for coal mine dump eco-engineering

Shao

et al. 2021

PeerJ

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Ground fissures (GF), appearing in front of dumps, are one of the most obvious and harmful geological hazards in coal mining areas. Studying preferential flow and its influencing factors in the ground fissures of dumps may provide basic scientific support for understanding the rapid movement of water and vegetation restoration and reconstruction in mining areas. Based on field surveys of ground fissures, three typical ground fissures were selected in the studied dump. The morphological characteristics of preferential flow for ground fissures were determined through field dye tracing, laboratory experiments, and image processing technology. The results indicated that the lengths of the three ground fissures ranged from 104.84 cm to 120.83 cm, and the widths ranged from 2.86 cm to 9.85 cm. All of the ground fissure area densities were less than 10%, and the proportion of ground fissure surface area was small in the dump. The maximum fissure depth was 47 cm, and the minimum was 16 cm. The ground fissure widths ranged from 0 cm to 14.98 cm, and the fissure width and fissure width-to-depth ratios decreased with increasing soil depth. The stained area was greater than 90% in the 0–5 cm soil layers of the three fissures, and water movement was dominated by matrix flow. The stained width decreased from 90 cm to 20 cm with increasing soil depth. The preferential flow was mainly concentrated on both sides of the fissure, which was distributed as a “T” shape. The preferential flow stained area ratios were 27.23%, 31.97%, and 30.73%, respectively, and these values decreased with increasing soil depth. The maximum stained depths of the preferential flow among the three fissures were different, and the maximum stained depth of GF II was significantly larger than that of GF I and GF III (P < 0.05). The stained path numbers of the three fissures ranged from 0 to 49. With increasing soil depth, the stained path number first increased and then decreased. The stained path widths of the three fissures ranged from 0 cm to 90 cm. With the increase in soil depth, the stained path width decreased. The stained area ratio was significantly positively correlated with ground fissure width, the ground fissure width-to-depth ratio, soil saturated hydraulic conductivity, soil organic matter, and sand content and was significantly negatively correlated with soil water content and clay content. The stained path number was significantly positively correlated with ground fissure width, the ground fissure width-to-depth ratio, soil saturated hydraulic conductivity and soil organic matter. The stained path width was significantly positively correlated with the ground fissure width-to-depth ratio, soil saturated hydraulic conductivity, soil organic matter and sand content and was significantly negatively correlated with clay content. Plant roots could significantly increase the stained area ratio, stained path number, and width and promote the formation and development of preferential flow.

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Section: Morphological Characteristics Of Ground Fissuressupporting

confidence: 84%

Section: Morphological Characteristics Of Ground Fissuresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Determining the influencing factors of preferential flow in ground fissures for coal mine dump eco-engineering

Shao

et al. 2021

PeerJ

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“…Manuscript to be reviewed affected by the gravity of the soil, uneven subsidence and rainfall characteristics (Li et al, 2018;Zhang et al, 2012;Zhou et al, 2011). Therefore, the formation mechanism of ground fissures in a dump is different from that of natural ground fissures.…”

Section: Morphological Characteristics Of Ground Fissuresmentioning

confidence: 99%

“…In summary, studies of soil fissures in coal mining areas are mostly concentrated in subsidence areas, while few studies have focused on ground fissures in dump areas, such as Zhou (2011), . Zhou et al (2011) pointed out that rainfall and groundwater discharge was important factors for the formation and development of ground fissure. Wang et al (2012) carried out that ground fissure were the precursor of landslide or debris flow hazard in the dump area.…”

Section: Introductionmentioning

confidence: 99%

Peer Review #1 of "Determining the influencing factors of preferential flow in ground fissures for coal mine dump eco-engineering (v0.1)"

2021

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Study on the Dynamic Development of Ground Fissures in Shallow Coal Seam Mining Under Ditch

cheng

2021

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In order to study the dynamic evolution law of ground fissures in shallow coal seam mining under ditch，taking the 14210 working face of a mine in northern Shaanxi as an example, this paper analyzes the dynamic development law of ground fissures in the process of mining under ditch through similar material simulation combined with the VIC-3D monitoring system. The results show that there are 20 ground fissures in the 14210 working face. The development width of ground fissures increases first, then decreases rapidly, and finally closes at the bottom of the ditch. The ground uplifts with a height of 1.5 m. The development width of ground fissures increases first, then decreases slightly, and finally tends to stabilize on the left and the right slopes, resulting in staggered steps with a height of 1.6 m and 0.7 m respectively. This change process is consistent with that of the strain of the underlying overburden obtained by VIC-3D strain analysis. According to their development positions and strain changes, the ground fissures are divided into three categories: tensile ground fissures on the left slope T1-T8, squeeze ground fissures at the bottom of the ditch T9-T13, and tensile ground fissures on the right slope T14-T20. Finally the safety analysis of mining under ditch in the 14210 working face is carried out.

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A Study on the Formation Mechanism and Preventive Measures of Coal-Mining Ground Fissures in the South-West of Pingyao

Cited by 3 publications

References 0 publications

Determining the influencing factors of preferential flow in ground fissures for coal mine dump eco-engineering

Determining the influencing factors of preferential flow in ground fissures for coal mine dump eco-engineering

Peer Review #1 of "Determining the influencing factors of preferential flow in ground fissures for coal mine dump eco-engineering (v0.1)"

Study on the Dynamic Development of Ground Fissures in Shallow Coal Seam Mining Under Ditch

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