DEP0029097DA - Expansion for underground mining operations. - Google Patents

Description

Essen, December 29th. 1948 * Schο 11 155

Government building master Haniis Schäfer, Essen-Bredeney,

Daimlerstr_ »?» _

"Expansion for underground mining operations" »

for the expansion of underground mining operations ■ In nePerer times, arches made of profile steel were often used. These line bends are two or more parts »The individual parts are usually connected to one another by tabs articulated. Because the mountains are set in motion by the mining of coal and thus the expansion of the routes is exposed to very high pressure loads, the expansion of the line is made flexible so that it remains effective for as long as possible »The steel expansion therefore sets the Use of rather intricate and delicate devices that precede the individual expansion frames On the whole, irrespective of the resilience of the steel body, making the steel body resilient »another disadvantage is the high steel consumption of the pit lining consisting of profile iron j the weight of a steel arch is e.g. 250 - 350 kg «

The subject of the invention is now a new type of pit construction, which consumes with a significantly lower amount of St aiii gets by, but the flexibility without impairment the load capacity is much greater »

According to the invention, the stretch curve or the other expansion element consists of laced wood concrete · The Corded wood concrete results in a maximum of load-bearing capacity, whereby the elasticity inherent in wood concrete also has a considerable yield is achieved as a whole. The screw-type reinforcement can move under load push together like a compression spring, because the wood-concrete can be compressed to a certain extent, without giving up its context and structure ο If it is a multi-part expansion frame, the individual parts made of wood-concrete are in

Claims (1)

- 2 - "Known Y / eise articulated or linked by tabs ν er "buna en. In the drawing ^ shows Mg. 1 a section through a section with an extension frame built into it, E ¹ Ig ₈ 2 is a longitudinal section through part of the route according to FIG. 1. Finally, Fig. 3 is a cross-section on a larger scale through an expansion arch according to the invention » The one in Pig. The expansion frame shown in 1 consists of the three parts I _5, 2, 3, which are articulated to one another at 4 and 5. The arches I _5, 2, 3 are made of wood-concrete. As Mg3 shows, the concrete body 6 is provided with a screw-like constriction 7 made of steel or iron wire and equipped in the known manner with spreader bars 8. This is advantageous for the wood-concrete body a polygonal profile chosen «, Between the individual arches can how Pig? 2 shows ^} Cb ^ CiTt -χ. - Laabzen 9 are arranged. Undergrowth concrete, the invention is understood a timber of a mixture of small (sawdust) and cement, as well as the usual additives _r moldings produced which is resilient in itself, that is compressible limited to lose j without its context. The wood-concrete bodies are then advantageously provided with a waterproof or water-repellent top layer. The wood-concrete construction elements according to the invention are characterized by their comparatively low weight despite their high load-bearing capacity and elasticity. Pa tenta η saying; Extension sheet ο »the like« for underground mining operations, daxL by that the body of the yoge or its parts made of flexible, laced wood concrete consists * Q e r P at ent aiiwal t s