| 摘要 |
A structure for supporting mining cavities in underground mines and tunnels comprises props or elements (1) filled with building material (6). The elements (1) are composed of several telescopic inner and outer tubes (4, 5) which can be braced against each other and against the roofs and floors by means of a suitable mechanism. The telescopic prop is first braced in this manner and then filled with building material (6). The building material (6) can be rapidly and advantageously hardened by means of a drainage device, in particular drainage boreholes (49, 50), and therefore a structure of this type can absorb high supporting forces. The core of building material is secured by the outer and inner tubes (5, 4) which act as a sheath. A reinforcement (45) can also be inserted in order to further increase the supporting forces to be absorbed. This telescopic prop comprising individual inner and outer tubes (4, 5) can be used to obtain a multiple-section supporting arch (89). Each end face of the inner and outer tubes (4, 5) carries connecting butt straps (85, 86) with boreholes (88), so that a very simple articulated joint can be obtained. |
