SU1694924A1 - Mine stopping - Google Patents

Abstract

The invention relates to mining and can be used to cut off the mine working sections while isolating the open spaces from existing workings and regulating ventilation flows in uranium mines. The purpose of the invention is to improve the reliability and tightness of the lintel by simplifying the design of sealing elements (CI). 1. The jumper consists of individual UE 1 in the form of a regular triangular prism solid from a material with elastic properties (microporta rubber, latex, etc.) to fill the narrow and deep irregularities, spaces between pipelines, etc. UE 2 is used with a smaller base. This ensures the copying of arbitrarily irregular cross-section contours without a gap. Making UE 1 and 2 solid ensures the reliability of the jumper, and making them s-shaped as a triangular prism from a material with elastic properties provides additional suspend of 1 sf. 4 il sl s o y u o o

Description

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The invention relates to mining L can be used to cut off sections of mine workings when isolating open spaces from existing workings and to regulate ventilation flows in uranium mines. The aim of the invention is to improve the reliability and tightness of the lintel by simplifying the design of the sealing elements.

FIG. 1 shows the jumper, general view; in fig. 2 is a section A-A in FIG. 1; in fig. 3 - diagram of the action of forces in the expansion of the sealing elements; in fig. 4 - single sealing element.

The jumper consists of separate sealing elements 1 in the form of a regular triangular prism solid from a material with elastic properties. Microporous rubber latex and other materials can be used as the lintel material. The lintel kit includes additional sealing elements 2 with a smaller base, which are installed under the roof when filling narrow and deep irregularities, the spaces between the pipelines and the surface of the excavation 3, and so on. P. The jumper is mounted in consecutive rows from bottom to top.

Sealing elements with different base areas allow full copying of as many irregular contours of sections or different sized irregularities (difficult terrain) of surfaces without a gap. In this case, the complete contour and relief copying is carried out only by changing the mutual arrangement and dimensions of the sealing elements, and the necessary compression (expansion) of the elements is due to the prismatic shape and elastic properties of the material of the element. It does not require the removal of irregularities in the surface of the machine making device or the use of restraints. It can be seen from the diagram (see FIG. 3) and the relation of forces that the execution of elements in the form of a regular triangular prism from a material with elastic properties leads to a relative self-compression (expansion of expansion) both between elements 1 and the working surface 3, which can change due to the number of elements in a given section,

Depending on the ratio of the components Pt, P2forces P (compressive force) and the elastic force of the material of the elements PI, Pg, it has a place where Pi –Pi1. P2-P21-compression (thrust) of the upper element; , P2 P2 - compression (thrust) of the lower elements, Pi Pi, P

- thrustless contact of the elements, which is observed only with the upper element freely lying. The force of the friction between the contacting faces of the Ptr elements prevents the movement of the upper element. directed in the direction opposite to the direction of movement of the upper element. At the same time, Pi, Pa are implemented according to a scheme similar to the power of R.

When determining the basic geometrical parameters of the sealing elements of the jumper, it is necessary to proceed from the condition that the jumper is kept in the working and resists the pressure of the air flow due to the frictional forces between the surfaces of the elements and against the walls of the working. Then

FTp 3 Fi FTp F2, (1,2)

where FTp, FTp is the strength of the friction;

Fi is the force of the frontal pressure of the air flow on an individual element;

Fa is the force of frontal pressure on the web.

Friction force between the surfaces of the elements (for loose element) FTp. (3)

The strength of the friction between the surfaces of the elements and the walls of the working

Rtri K2p52 d, (4)

where Ki, K2 are the friction coefficients, respectively, between the surfaces of the elements and the walls of the excavation;

p is the density of the material;

Si, 82 - midsection, respectively, of the element and jumpers; I - the length of the element.

Force of pressure on a single element

40

Fi bpbSiV2 / 2. (5)

Front pressure force on lintels

F2 Ј /9bS2V2/2.(6)

where Ј is the dimensionless front pressure ratio;

p is the density of air; V is the air flow rate. Taking into account the values that make up the equilibrium condition (1), the length of the element is determined.

 /9bV2/2Ki/)g.(7)

Claims (2)

Claim 1. Mine shaft, including a web of sealing elements in the form of prisms, characterized in that, in order to improve the reliability and tightness of the jumper by simplifying the design, the sealing elements are made solid and in the form of regular triangular prisms of elastic material, 2. A jumper according to claim 1, characterized in that the prisms have bases of various sizes. 1 V FIG. five