SU1444520A1 - Method of mining thick sloping seams - Google Patents

Abstract

The invention relates to the mining industry and m. used in underground mining of predominantly outburst reservoirs by chambers using self-propelled equipment. The purpose of the invention is to increase the efficiency of the clearing recess and to ensure the stability of self-propelled equipment. To the soil 1 of the developed washing layer along the wall of chamber 2 from the surface of the upper step 2, an inclined exit 6 to the soil of the layer is formed. In this case, each subsequent exit 6 is held ahead of the length of chamber 2, which is equal to the advance of the excavation cycle relative to the preceding exit 4. During the mining process, surfaces of exits 4, 6 are parallel to each other with a slope towards the wall of chamber 2, along where they are located. The progression of the ramps 4, 6 is carried out simultaneously with the advancement of the forward slab 7 and the corresponding ledges. The lengths of the latter are taken to be greater than the size of the outer turning radius of the vehicle of the self-propelled equipment entering the complex and having a shorter maneuverability. This eliminates tipping cars when turning from exits 4 and 6 to the ledge. 2 hp f-ly, 1 ill. (L: & 4ib SP N9

Description

11444520

The invention relates to the mining industry and can be used in the underground development of powerful flat, predominantly outburst reservoirs using self-propelled equipment.

The aim of the invention is to increase the efficiency of the clearing recess.

The drawing shows the scheme of the proposed method,

To the soil 1 of the developed thick reservoir along the wall of the chamber 2 from the surface of the upper ledge 3 form

inclined exit 4. Near it, from the surface of the underlying ledge 5, form an inclined exit 6 to the soil of the formation. The inclined exit 6 is advanced ahead of the length of the chamber, equal to the advancement of the notch cycle relative to the inclined exit 4. If there are several ledges, similar inclined ends are formed from the surface of each of them and with such advance relative to the adjacent inclined exit.

The movement of the inclined ramps is carried out simultaneously with the movement of the forward slab 7 and the corresponding ledges. For this, parallel to the surface of inclined ramps and to a depth equal to their width, the row of parallel holes 8 and 9 is drilled. The distance from the holes to the surface of the inclined ramps is determined by the formula

15

20

25

thirty

35

sa ma d no ma r

F

gi you re fo ma l tse o pho p us pr

sh uk vr eat

and 1 in sin p.

where 1

VX

behind

fi length of care

breaking cycle, m;

tilt angle of exits:

hail.

The boreholes are drilled with a slope of 6–8 ° towards the chamber wall and have a right angle to the side walls of the inclined ramps. The bore-holes are drilled after drilling in the cutting-edge 10, the buoyant 1Gi of the contoured 12 boreholes in the front face 7.-And in order of priority with the boreholes 13 and 14 located in the ledges.

The length of the ledges is taken by a larger value of the outer turning radius of the 14th tire, which is part of the complex.

Q

five

0

five

0

five

0

five

0

self-propelled equipment and having maneuverability. This will prevent tipping cars when turning from an inclined exit to the ledge. The tipping of the machines can also be avoided by placing the ledges at an obtuse angle to the inclined ramps. In this case, the length of these ledges can be reduced. To reduce the risk of self-propelled equipment slipping when working on inclined exits, the surfaces of inclined exits are inclined towards the wall, the chamber along which these exits are located. The slope value should not exceed the lateral stability angle of the self-propelled equipment complex machines (6-8),

Claims (1)

Invention Formula 1, Method of developing powerful flat seams, including drilling and blasting excavation of a mineral in a continuous soil-access chamber. slaughter, the formation of inclined congresses along the mineral array, about t and h and the fact that, in order to improve the performance of the clearing recess, inclined exits form from the surface of each of the ledges to the camera soil along it, each subsequent inclined ; the departure is delayed in relation to the previous congress, then the said congresses work out one ... .. temporarily with the movement of the ends of the ledges, and the surfaces of the inclined congresses form one parallel to the other during the process, 2, the method according to claim 1, 1 and 2 with the fact that, in order to ensure the stability of the self-propelled equipment, the surfaces of the inclined slides are inclined towards the wall of the chamber along which they are located, 3, the method according to claim 1, which also takes into account that the inclined ramps are formed with an advance equal to the amount of advancement during the breaking-out cycle.