Fracture Evolution and Accumulation and Dissipation Law of Energy During Ascending Mining

Liu, Xuesheng; Tan, Yunliang; Ning, Jianguo; Wang, J.

doi:10.1007/s10706-015-9973-6

Cited by 5 publications

(2 citation statements)

References 15 publications

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“…In his numerical model, very elastic soft material was used to simulate the gob material. Liu et al discussed the accumulation and dissipation law of energy during the process of ascending mining using FLAC3D software with no consideration of the goaf model. Wang et al also investigated the energy change in a coal seam using a numerical model.…”

Section: Introductionmentioning

confidence: 99%

A numerical study of the mining‐induced energy redistribution in a coal seam adjacent to an extracted coal panel during longwall face mining: A case study

Wang

Qiu

Ning

et al. 2019

Energy Science & Engineering

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Mining of the coal seam adjacent to the extracted coal panel is widely practiced in China to improve coal resource recovery rates, but the energy change associated with longwall mining may present a new risk to ground stability and gateroad failure. To understand the energy change effectively, a meticulously validated numerical model, built using FLAC3D software, incorporating a double‐yield model for the gob materials and a strain‐softening model for the coal/rock masses, was developed to investigate the energy redistribution in coal seams and barrier pillars during the process of mining the coal seam adjacent to the extracted coal panel. The model results showed that the closer the region was to the LW 5301 gob, the higher the location and magnitude of the peak strain energy density. Consequently, the risk of rockburst in coal seams was greater than that in barrier pillars. Along the coal seam strike, with increasing advancing distance from the setup room, the magnitude of the peak strain energy density gradually increased to 1.88‐2.78 times the premining energy level. In addition, along the coal seam dip, the maximum distance from the peak strain energy density to the edge of the coal seam was approximately 16‐28 m, which is greater than that in the barrier pillar. The proposed numerical simulation procedure and calibrated method could be a viable alternative approach to evaluate longwall mining‐induced energy changes.

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Section: Introductionmentioning

confidence: 99%

A numerical study of the mining‐induced energy redistribution in a coal seam adjacent to an extracted coal panel during longwall face mining: A case study

Wang

Qiu

Ning

et al. 2019

Energy Science & Engineering

View full text Add to dashboard Cite

show abstract

“…Excavation in an ascending sequence can reduce water and sand inrush events, gas outbursts, and rock bursts (Jin et al 2016;Liang et al 2013;Liu et al 2016). Also, when the roof of the upper seam is strong or the coal is difficult to mine, an ascending sequence can be used to reduce or even eliminate the periodic pressure surge of the structure and rock bursts.…”

Section: Introductionmentioning

confidence: 99%

Overburden Failure Associated with Mining Coal Seams in Close Proximity in Ascending and Descending Sequences Under a Large Water Body

2017

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Research on the Energy Criterion for Rockbursts Induced by Broken Hard and Thick Rock Strata and Its Application

et al. 2016

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Fracture Evolution and Accumulation and Dissipation Law of Energy During Ascending Mining

Cited by 5 publications

References 15 publications

A numerical study of the mining‐induced energy redistribution in a coal seam adjacent to an extracted coal panel during longwall face mining: A case study

A numerical study of the mining‐induced energy redistribution in a coal seam adjacent to an extracted coal panel during longwall face mining: A case study

Overburden Failure Associated with Mining Coal Seams in Close Proximity in Ascending and Descending Sequences Under a Large Water Body

Research on the Energy Criterion for Rockbursts Induced by Broken Hard and Thick Rock Strata and Its Application

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