| 摘要 |
FIELD: blasting jobs. ^ SUBSTANCE: invention relates protection devices used in mine industry. Proposed shock air wave power attenuator comprises flexible partition covering crosswise section of mine working and fixed its walls. Aforesaid partition represents a set of spatially oriented sections of chains making chain joints. The latter are fixed in vertical plane of mine working by C-shape links, while in horizontal pane each chain section is fixed by aforesaid links on lateral walls of mine working, all sections being interjointed in horizontal plane. Snap hooks are used to interconnect aforesaid chains, while connecting rings are used to interconnect chain sections. ^ EFFECT: simpler design and servicing, lower costs. ^ 3 cl, 4 dwg |
