Author(s)

Qing Li, Pengcheng Guan

Corresponding Author

Qing Li

Abstract

Under the combined action of the strike angle and dip angle of coal seam, the coal wall failure, top coal migration, support stress and roof control of double inclined FMT-CCF (fully mechanized top-coal caving face) are special. In order to solve the difficult problem of stability control of support-surrounding rock system in FMT-CCF with LDA(large dip angle) in coal seam, the stability of support-surrounding rock system in FMT-CCF with LDA in transition area of angle change was studied by comprehensive research methods such as simulation experiment, theoretical analysis and field ground pressure observation, and the sub-regional characteristics of deformation and failure of surrounding rock and support stability in FMT-CCF with LDA and variable angle were analyzed. Successful experience has been gained in controlling the stability of support and surrounding rock in FMT-CCF with LDA, and the safety in production has been guaranteed.

Keywords

Large dip seam, Fully mechanized top coal caving face, Stability of surrounding rock