| 摘要 |
FIELD: mining. ^ SUBSTANCE: device includes metal pressure shield in the form of rectangular parallelepiped consisting of four triangular prisms attached to each other, the bases of which have the shape of oblique right triangle, drain pipes with filters and sampling pipes with plug, door opening with door made in the shield, soft covers arranged on upper and lateral sides of shield, the height of which exceeds distance between shield and mine working section outline at their complete filling with compressed air. At bottom, on the side of filling mass the shield is equipped with rubber-coated canvas. Soft covers installed to lateral sides of shield are arranged on brackets attached throughout the height of connection strap to its side walls. Width of brackets is accepted equal to 2/3 of width of soft covers, and distance between brackets is determined from the following ratio: hmax>a>hmin, where a - distance between brackets, m; hmax - maximum height of soft covers at supply of compressed air to it, m; hmin - minimum height of soft covers after air discharge from it, m. ^ EFFECT: reducing labour intensity at installation of connection strap, increasing efficiency and improving reliability of control of filling mass. ^ 5 dwg |
