DE1156036B - Process for the fully mechanical extraction of powerful storage areas in disk construction - Google Patents

Description

Process for the fully mechanical extraction of massive deposits in pane construction The invention relates to a method for fully mechanical extraction of mighty deposits in disk construction with a stamp-free front using of progressive expansion, with the disks being obtained in chronological order from top to bottom an artificial durable roof for the following lower lying mining operations in such a way that with the heroin extraction the higher sole on the lying surface, a lost expansion is made.

An improvement of this known method is according to the invention achieved in that the respective upper disc is built with full offset, wherein the full backfill is introduced in two layers, of which the lower layer by a binder and; or inserts formed as a coherent concrete layer is. This enables a fully mechanical extraction of a mighty seam in disc mining with a stamp-free front using fully mechanically progressive expansion in conjunction with full offset, being the bottom layer of the offset is solidified in such a way that the mining space in the extraction of this: zone through a progressive expansion open: oil can be kept.

It is known per se to cause wood warping when building panels, which can serve as a roof in the illustration of the lower pane. Such a timber construction However, you have to practically 'coals': 7: i'inü? i? eihgebr. '. Cilt `: y'. ° den. 'se? e; brl consists of the near part. that through the decomposition pressure the wood expansion into our pane is pressed in. It bothers and causes a fully mechanical profit-making.? this should be in a stamp-free dismantling front. The Holzausbu is in @@ olgedessen dem harder and more flexible B = toniusbau at a disadvantage.

In contrast, the invention sees the E: iilbririen according to Fig @u in a solidified backfill layer, which is then used as a hanging wall for the fully mechanical Profit unini, progressive expansion on the ste: r_pelfrei front in the following Layer serves. The method according to the invention is therefore not concerned with the simple exchange of a wooden construction with an equivalent concrete construction. It is therefore essential that the roof does not come together for the sub-window below with the expansion, special - rn m1 = the offset is introduced. Only in this: wise is it possible to use a fully mechanical progressive expansion and the process to machanize. It must be taken into account that not only the known properties of the concrete that distinguish it from other materials, namely its high load-bearing capacity compared to wooden floors or wire mesh, but rather the invention also makes z. B. the hardness and the property of the concrete, great To form areas, so that there is a low pressure per unit area, which prevents the concrete lining from being pressed into the lower pane by the demolition pressure. The dense structure of the concrete instead of a plank or mesh roof prevents the offset from trickling through when the layer below is broken down.

in a further development of the invention, it can be recommended. that the concrete layer is provided with a steel reinforcement lying in the direction of dismantling. The Reinforcement in the direction of dismantling by steel inserts running in the direction of the face reinforced sUM. Furthermore, the individual layers of concrete can hit the coal face the next overlap the deeper disc, z =; above di ° A: leading to the reinforced concrete layer in prestressed concrete is appropriate.

In the drawing, a 0aerschnin is shown as an exemplary embodiment a mighty seam, which is to be extracted heroin in three disks, is shown.

The individual disks A, B and C are heroin extracted in such a way that the coal pile 1 in the disk A leads at least by the width of the strut 2 compared to the pile 3. This is in turn by the same amount, i.e. by the width of the strut 4 ', from-replaces opposite d ° m joint 5 for the extraction of the lower disc C. The hanging wall for the upper disc A is the natural rock 6. For the heroin extraction of the disc B, the concrete layer 7 serves as the hanging wall and the concrete layer fa ensures the dismantling of the lower one Disc C.

Support frames 9 are braced between the lying and the hanging wall. You may with appropriate training the natural hanging wall 6 or also that formed from the concrete layers 7 and 8 No hanging walls for the two panes B and C. The extraction of coal is automatically effected in the outlined embodiment by coal planer 10, the are performed on double chain conveyor 11.

In each case, when the dismantling in the slices A and B has advanced by a sufficient amount, the concrete layer 7 or 8 is pre-built. As a result, there is always sufficient support of the concrete layer on the underlying disc B or C to be dismantled. The rear part of the two concrete layers 7 and 8 is supported by offset 1.2, which is introduced into the excavation cavities after dismantling has taken place. In the embodiment outlined, it can be clearly seen from the concrete layer 7, which forms the hanging wall for obtaining the disk B, that the concrete layer rests on both sides. According to this, their strength and their movement are to be measured.

That the reinforcing steel is predominantly perpendicular to the working face, should be taken for granted. In the outlined embodiment are only the additional reinforcing steel 13 running transversely thereto is indicated.

Claims (4)

PATENT CLAIMS: 1. Process for the fully mechanical extraction of massive deposits in disc construction with a stamp-free front using gradual expansion, whereby an artificial, durable roof is created for the subsequent lower-lying mining operations in a chronological sequence for the extraction of the discs from top to bottom, that when the higher sole is gained in each case on the lying floor, a lost expansion is produced, characterized in that the respective upper pane is built with full offset, the full offset being introduced in two layers, of which the lower layer is ittel and / or deposits is designed as a cohesive concrete layer. 2. Procedure according to claim 1, characterized in that the concrete layer (7 or 8) with a steel reinforcement lying in the direction of dismantling is provided. 3. The method according to claim 1 or 2, characterized in that the reinforcement lying in the dismantling direction by steel inserts (13) extending in the face direction are reinforced. 4. Procedure according to one of claims 1 to 3, characterized in that the reinforced concrete layer (7 or 8) is made of prestressed concrete. Publications considered: German Patent No. 929181; U.S. Patent No. 1,334,894; Heise-Herbst-Fritzsche: "Bergbaukunde", Vol. 1, 1949, pp. 467, 468 and 470.