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A platform for research: civil engineering, architecture and urbanism
Study on surface subsidence prediction method of shallow coal seam backfill-strip mining under the hard roof
Abstract Because of the easily caused damage to ground buildings by shallow coal seam mining under the hard roof, backfill-strip mining has been gradually adopted to realize the sustainable development of mining and protection of ground buildings. The surface subsidence prediction method in backfill-strip mining is not clear enough to the shallow coal seam under the hard roof. This paper adopts the numerical simulation method to study the surface movement characteristics of shallow coal seam backfill-strip mining under the hard roof. The results show that the maximum surface subsidence and the stress of the filling body are directly proportional to the width of the caving mining working face in the range of 30 ~ 80 m. The stress of the coal pillars on both sides is unchanged. The thickness from the wave band to the surface conforms to the quadratic function. The characteristics of surface movement conform to the prediction model of the probability integral method. Based on the probability integral method, the superposition calculation method of backfill-strip mining is deduced, and the prediction parameters calculation equation of the whole backfill-strip mining area is given. Finally, 5 backfill-strip mining schemes are designed in combination with the case. According to the protection index and the economic benefits, the best mining scheme is determined. The research results provide a reference for surface subsidence prediction in similar geological conditions.
Study on surface subsidence prediction method of shallow coal seam backfill-strip mining under the hard roof
Abstract Because of the easily caused damage to ground buildings by shallow coal seam mining under the hard roof, backfill-strip mining has been gradually adopted to realize the sustainable development of mining and protection of ground buildings. The surface subsidence prediction method in backfill-strip mining is not clear enough to the shallow coal seam under the hard roof. This paper adopts the numerical simulation method to study the surface movement characteristics of shallow coal seam backfill-strip mining under the hard roof. The results show that the maximum surface subsidence and the stress of the filling body are directly proportional to the width of the caving mining working face in the range of 30 ~ 80 m. The stress of the coal pillars on both sides is unchanged. The thickness from the wave band to the surface conforms to the quadratic function. The characteristics of surface movement conform to the prediction model of the probability integral method. Based on the probability integral method, the superposition calculation method of backfill-strip mining is deduced, and the prediction parameters calculation equation of the whole backfill-strip mining area is given. Finally, 5 backfill-strip mining schemes are designed in combination with the case. According to the protection index and the economic benefits, the best mining scheme is determined. The research results provide a reference for surface subsidence prediction in similar geological conditions.
Study on surface subsidence prediction method of shallow coal seam backfill-strip mining under the hard roof
Bo, Huaizhi (author) / Guo, Guangli (author) / Li, Huaizhan (author) / Wang, Yuezong (author) / Jiang, Qian (author) / Hu, Shaohao (author) / Zhang, Fanglong (author)
2023
Article (Journal)
Electronic Resource
English
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB18
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