2021
DOI: 10.1177/01445987211009390
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Comprehensive technical support for safe mining in ultra-close coal seams: A case study

Abstract: In order to mine the coal seam under super-thick hard roof, improve the utilization rate of resources and prolong the remaining service life of the mine, a case study of the Gaozhuang Coal Mine in the Zaozhuang Mining Area has been performed in this paper. Based on the specific mining geological conditions of ultra-close coal seams (#3up and #3low coal seams), their joint systematic analysis has been performed, with the focus made in the following three aspects: (i) prevention of rock burst under super-thick h… Show more

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Cited by 10 publications
(6 citation statements)
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“…From the physically similar simulation experiments, it is easy to see that during the large periodic step-down motion, the brace load Pm on the W1701 working face is composed of the static load of the direct top, the interval layer that emerges with mining and the dynamic load of the step rock beam that produces the step-down motion (Figure 9), and the brace load Pm of the step rock beam is calculated by [21,29]. Step rock beam support load model.…”
Section: Mechanism Of Strong Mine Pressure On the Roofmentioning
confidence: 99%
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“…From the physically similar simulation experiments, it is easy to see that during the large periodic step-down motion, the brace load Pm on the W1701 working face is composed of the static load of the direct top, the interval layer that emerges with mining and the dynamic load of the step rock beam that produces the step-down motion (Figure 9), and the brace load Pm of the step rock beam is calculated by [21,29]. Step rock beam support load model.…”
Section: Mechanism Of Strong Mine Pressure On the Roofmentioning
confidence: 99%
“…Tu Shihao et al [18], in response to the problem of large impact pressure on the overlying rocks, adopted the control measures of blasting the residual coal column to release the top and unload the pressure, injecting sand into the coal room and reasonably controlling the mining height to achieve the safe and efficient production of the working face in response to the problem that the mining under the room mining area of the working face of the shallowly buried coal seam is prone to unload the mine pressure and even the mine pressure. Xu Jingmin et al [19] proposed the control measures of using blasting or other means to weaken the coal pillar of room Processes 2023, 11, 1320 3 of 15 mining in advance, slow down the advancing speed of the working face, and slurry filling in the coal pillar area of room mining in view of the vulnerability of mining under the room mining area of the shallowly buried coal seam, and other scholars put forward the control measures of optimizing the position of back mining tunnel under the near coal seam mining area [20][21][22][23], and joint and coordinated mining of near coal seam group [24][25][26][27], etc. The technical measures for mine pressure control are proposed.…”
Section: Introductionmentioning
confidence: 99%
“…e annual precipitation reaches about 793.0 mm, and the average annual evaporation stands at 1791.7 mm [26,27]. Geographically, the study area features a lakeside alluvial plain with flat terrain, highly developed road network and dense population.…”
Section: Study Areamentioning
confidence: 99%
“…In summary, great achievements have been made in the layout of roadway and the control theory of surrounding rock in close coal seams 10–16 . However, there is little or no research on the geological conditions of the upper and lower coal seams which are very close to each other.…”
Section: Introductionmentioning
confidence: 99%
“…In summary, great achievements have been made in the layout of roadway and the control theory of surrounding rock in close coal seams. [10][11][12][13][14][15][16] However, there is little or no research on the geological conditions of the upper and lower coal seams which are very close to each other. In this paper, the study of the upper and lower coal seam is 1 or 0 m spacing, the mining characteristics of double gobs, this study fills the previous study [17][18][19][20][21][22] of very close coal seams mining.…”
Section: Introductionmentioning
confidence: 99%