SU1461933A1 - Method of setting supports in stope - Google Patents

Abstract

The invention relates to mining, can be used in the development of steep coal seams and reduces the laboriousness of the installation of lining (K) in the process of cleaning works. They are placed in the bottomhole space, a row of the pneumatic lowering pneumatic balloon K, moving the bearing shells K from the ventilation drift - - - along the cleaning face. After descending the entire row of 1 K at the bottom of the borehole, the shell space of the row of 1 K is inflated with compressed air prior to contact with the excavation mechanism (BM) 2. At the end of the excavation, the strips of coal are fed into the shell of the row of 1 K to the operational value. Having blown the shells of a row of 1 K can begin simultaneously with the beginning of the excavation of the strip of coal and end after moving the BM 2 along the cleaning face to a length. BM 2. The magnitude of the overpressure when the shells are inflated with compressed air is determined from the ratio P (P - - Fb) / K-S, where F is the nominal force generated by the drive drive VM 2, I; Fj - maximum movement force of VM 2 without pressing it with a shell to a clearing face. AND; K - coefficient of resistance to the movement of the BM 2 over shells of a row of 1 K and the cleaning face; S is the contact area of VM 2 with a shell of a row of 1 K, see 1 s.p., f-ly, 1 ill. (/) // One f from 00

Description

The invention relates to mining and can be used in mining steep coal seams.

The purpose of the invention is to reduce the labor intensity of the installation of lining during the cleaning works.

The drawing shows a diagram of the installation of pneumatic bolting in contact with the cutting mechanism,

The method is carried out as follows.

In the development of a steep coal seam with machine-dredging by coal, tilted in the direction of mining, after excavation the strip of coal is placed in the bottom-hole space a row of 1 downhill pneumatic support, moving the supporting shells of the lining from the ventilation drift along the clearing face. After descending the entire row of lining into the bottom-hole space of the shell of row 1, lining is inflated with compressed air until it comes into contact with the excavation mechanism 2, which is moved along -p and 1 lining, creating a recess in the shells at the site of contact with the excavation mechanism. At the end of the excavation, the strips of coal are compressed into the bearing shells of the row of support and compressed to the operating pressure. The hulls of the row and the lining abut between the soil and the roof of the formation with greater force and provide working resistance.

Having blown the shells of row 1, the lining can begin simultaneously with the beginning of the excavation of the strip of coal and finish when the excavation mechanism 2 moves along the clearing face by an amount equal to its length.

The required value of excess pressure when the shells are blown by compressed air is determined from the ratio

R -

Fn - Fe K-S

de F, is the nominal force generated by the drive, the feed of the excavation mechanism, H; Fft is the maximum force of movement of the excavation mechanism without pressing it with the shell to the clearing face, N; K - coefficient of resistance

movement of the excavation mechanism along the shells of a number of lining and cleansing face;

S is the contact area of the notch with a shell of a row and a support, m,

PRI me R. When developing a coal seam with a capacity of 0.6 m with an angle of coal mining, the coal is produced by a Poisk-2 combine with a 1LGKNM-2P winch from bottom to top, tilted towards the formation at an angle of 15 ° to the line of dip (recovery) of the formation. After removing the strip of coal with a width equal to the installation step of the rows of lining, from below upwards and lowering the combine to its initial position, a row 1 of the pneumatic lowering lining consisting of dpi-dimensional non-drying casings is placed in the bottomhole space, moving the shells from the ventilators; After the descent of the whole row of lining into the wellbore space, simultaneously with the blowing of the shells of the row and compressed air, the coal cavity is dredged by a combine. Having blown the shells can end when the combine moves along the clearing slab over its entire length of 4.3 m. The required amount of overpressure when the shells are blown is determined from the ratio

R

Fn - Fj

K.S

five

0

five

0

five

For

F,

this particular case at 100 kN; F .50 kN; K 0.5;

100-50

S 2 cm2 P

 50 kPa

0.5-2 0.5 kgf / cm2.

The combine is lowered to its original position after the strip has been removed by force with the help of a tail rope and a winch located on a haulage or ventilation drift.

Claims (1)

1. The method of installation of lining in the clearing bottom, including the descent of a number of long shells of pneumatic support at the face and the installation of the specified lining with the possibility of moving along the excavation mechanism, blowing the shells with compressed air and subsequent increase in pressure in them to the operational value from - l and h and y. u and so that, in order to reduce the complexity of the work 31 for the installation of lining during the cleaning works, dpnomernyh shells are installed with the possibility of contact with the excavation mechanism after Duva their compressed air, while blowing the shells lead to a pressure of compressed air in them, which is determined from the ratio p -iMLJLle P „- nominal force generated by the drive of the feed mechanism of the excavation mechanism, N; F - maximum force of movement of the excavation mechanism without pressing it to the clearing face, H; K - coefficient of resistance to the movement of the excavation mechanism along the shells of a number of lining and cleansing face; S is the area of contact of the notch with a shell of a row of supports, m. 2, The method according to claim 1, that is, and with the fact that having blown the shells of the supports begin simultaneously with the cleaning work and end after moving the notch mechanism along the clearing face for the depth of the specified mechanism.