| 摘要 |
FIELD: mining, particularly to develop coal, potassium and rock salt formations with mechanized mining complexes. ^ SUBSTANCE: powered support section covering comprises apron in which sliding apron supported by guiding means is installed and hydraulic jack for sliding apron movement. The sliding apron is covered with protective case connected with the hydraulic jack. The sliding apron has groove formed in lower part thereof and provided with pneumatic cylinder adapted to be filled with air when sliding apron enters coal slot. ^ EFFECT: prevention of apron gumming during mineral excavation, prevention of sliding apron damage, prevention of mineral inrush into mining face, creation of additional support zone for powered support. ^ 3 dwg |
