Author(s)

Ruize Xu ¹, Ranghe Zhu ², Qiang Ma ²

Affiliation(s)

¹ College of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan, 454001, China
² Henan Xuchang Xinlong Mining Co., Ltd., Yuzhou, Henan, 461670, China

Corresponding Author

Ruize Xu

ABSTRACT

Aiming at the problems of strong dynamic pressure, severe roadway deformation and difficult implementation of Roof cutting Gob-side entry retaining technique in the application of weak and thick coal seam conditions, combined with the 21051 working face of Liangbei Mine, proposed the surrounding rock deformation control idea of concrete flexible membrane + dense anchor cable beam + single hydraulic prop cooperative support. The theoretical calculation verifies the load capacity of the flexible concrete infill wall. Simulation and analysis of the deformation pattern of large mining height and soft coal seam conditions were carried out using FALC 3D numerical software. The numerical calculation showed that the flexible concrete formwork can prevent the rotation of the short arm beam in the roof structure of the gob-side entry retaining wall to a certain extent and decrease the deformation in the roof structure in the deck. The support parameters of gob-side entry retaining were designed, and conducted field trials. The field application results indicate that under the active support, single hydraulic prop and flexible formwork support, the roof of gob-side entry retaining is complete, the degree of distortion of the enclosing rocks is within manageable limits, and the field application effect is good, that can meet the demands of the next mining face.

KEYWORDS

Soft and Weak Thick Coal Seam, High Cutting, Roof Cutting Gob-Side Entry Retaining, Flexible Concrete Infilled Wall, Roadside Support

CITE THIS PAPER

Ruize Xu, Ranghe Zhu, Qiang Ma, Application of Roof Cutting Gob-side Entry Retaining Technology in Soft Coal Seam with Large Mining Height in Liangbei Mine. Journal of Civil Engineering and Urban Planning (2024) Vol. 6: 76-85. DOI: http://dx.doi.org/10.23977/jceup.2024.060111.

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