RU1788255C - Method for mining interlayer series of coal - Google Patents

Abstract

The invention relates to mining. . namely, the development of powerful shallow formations, and can be used to reduce the dynamic loads on the lining and reduce the complexity of the work. SUMMARY OF THE INVENTION: between the hydraulic pillars of the mechanized complex of the upper layer at an angle of natural collapse into the interlayer thickness of the drill hole, fill them with an non-explosive destructive mixture and this thickness is weakened, and before release, it is destroyed by the active dispersion of the hydraulic stands of the mechanized complex of the lower layer. 1 ill.

Description

The invention relates to mining, and in particular to the development of powerful shallow formations.

A known method of excavating a powerful formation by maintaining the roof in the installation layer by means of flexibly connected air cylinders, by lowering the air pressure in which the roof is smoothly lowered, and the interlayer thickness is excavated under the protection of the shells of the same air cylinders left in the worked out space of the installation layer .

A method is also known for dredging thick coal seams in layers. The bottom layer is tested in two successive faces in an ascending order, maintaining the interlayer stratum in the leading face by means of air cylinders installed in continuous rows. Cutting slits in the interlayer thickness are cut from the clearing side. The lowering of the coal mass between the cut holes is carried out sequentially along the lagging treatment face by reducing the pressure of the working fluid in the pneumatic cylinders. Separate blocks of coal transport n: about the shells of the pneumocylinders before transport development with the subsequent destruction of oversized materials to interface the lagging output.

A known method of developing powerful shallow coal seams with the abandonment of interlayer packs. Following the passage of the complexes, the interlayer packs collapse and lower to the soil of each layer at an angle of no more than 50 ° to the last. When mining the lower layer, the collapsed coal is discharged onto the downhole conveyor.

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A known method of excavating the interlayer thickness of the angle of the monitor, which is installed on a mining machine. The corner strip of the interlayer sequence is cut from its main array at an angle of 40 - 65 ° to the horizon with a high pressure water jet and cut coal is released between the screws of the extraction machine.

A known method of developing powerful flat coal seams on a system of short columns. In this case, drifts are carried out at the formation soil along its strike, forming a horizon. The drifts are knocked off between each other through 25 - 30 m orts. The release of the interlayer thickness coal under the flexible overlap is carried out by loosening the last of the intermediate drifts, which are carried out in front of the treatment faces and parallel to them (prototype),

However, the known methods are characterized by the following disadvantages:

large losses, the formation of oversized, dynamic loads on the lining ;. .

the complexity of pa6of;

hardening coal;

low power strip interlayer thickness equal to the width of the digging machine,

The aim of the invention is to reduce the dynamic loads on the lining and reduce the complexity of the work.

The goal is achieved in that, between the hydraulic pillars of the mechanized complex of the upper layer, wells are drilled at an angle of natural collapse into the interlayer sequence, they are filled with an non-explosive destructive mixture and the specified layer is weakened, and before release, they are destroyed by the active spread of the hydraulic pillars of the mechanized complex of the lower layer.

The drawing shows a diagram of the excavation of the interlayer thickness of the coal,

The claimed method includes a mechanized complex for excavating the upper layer 1, flexible overlap 2, interlayer thickness 3, a mechanized complex or aggregate of type (6, 7), wells 5, a protective pack 6.

The claimed method is carried out as follows.

The method of excavation of the interlayer coal stratum begins with mining the upper layer of the mechanical complex 1. As the treatment bottom of the upper layer moves between the hydraulic pillars of the mechanical complex 1 of the upper layer, wells 5 are drilled into the interlayer thickness at an angle of natural collapse of the coal, leaving the protective pack b, After excavating the coal, before the shifts of the lining sections of the mechanical complex 1 fill the wells 5 with an non-explosive destructive mixture (LDC) and supply water to the wells 5. Then the lining sections of the mechanical complex 1 are moved

and lay a flexible overlap on the soil layer of the upper layer. After a certain time, pressure is created inside the wells 5, as a result of the connection of water with the LDC, which leads to a weakening of the interlayer thickness of the coal. The protective pack b protects the bottom face of the lower layer from the collapse of the corner of the interlayer thickness into the bottom hole. Coal discharge Coal is protected

flexible overlap in the obstruction. Before the release of the coal of the interlayer sequence 3 by the active control of the hydraulic pillars of the mechanical complex 4, the protective pack b is destroyed and the coal is released.

The distance between the wells and the step of production of the interlayer thickness of the coal are equal and correspond to the working width of the shearer of the undercut face.

Community Benefits

The claimed method is as follows: the efficiency of the output of the interlayer thickness of the coal is increased;

the mechanical complex of slash 4 does not experience large dynamic loads

when releasing coal; .

Claims (1)

coal losses are reduced. SUMMARY OF THE INVENTION A method for excavating an interlayer thickness of coal, including working out the upper layer with a mechanized complex, laying the upper layer of flexible overlap on the soil, excavating a subsurface mechanized complex at the formation soil and releasing the interlayer thickness of coal under the protection of flexible overlapping, characterized in that, in order to reduce dynamic loads on the lining and the complexity of the work, between the hydraulic pillars of the mechanized complex of the upper layer at an angle of natural collapse in the interlayer thickness, the wells are drilled, filled t unexplosive destroying their mixture and attenuate said column, and before the release of its active destroy the thrust of hydraulic mehaniziro5 vannogo complex backsheet.  gt oit Compiled by D. Komchybekov Editor T. Kurkova Tehred M. Morgenthal Corrector S. Yusko