SU1510453A1 - Method of erecting storring in mine working - Google Patents

Description

t

(21) 43D6442 / 03

(22) 12/21/87

(A6) 07.06.92. Bul Ь 21

(.72) J.Ya. Saveliev, V.P. Kovalenko,

G- L.Sergui, L.G.Nedelsky, V.I.Stepdchyuv and L.P.Litviryuv

(55 Г-622.273.2 (088.8)

(%) Litor's certificate of the USSR

К ° 977836, cl. E 21 F 15/02, 1981.

USSR author's certificate f 1129384, cl. E 21 F 15/00, 1983.

(5) METHOD FOR INCLUSION IN THE MOUNTAIN REMOVER

(57) The invention relates to the mining industry and to the gas and gas isolation of the mine workings (HS). The purpose of the invention is to reduce

the cost of building jumpers (P) and increase its strength. At the site of construction, GW 1, the roof rocks and side surfaces of GW 1 are blasted. By selecting a combination of bore-holes and charges, an explosive image} dams in the center P of frame 7 from cr, n} of the first pieces of rock. Isolation screen 8 is formed from small pieces of rock, which prevents the filling of array 10 into the body of P. The pieces of rock P are fastened together in Bentec TBM bombs, which are placed in boreholes as a blocker for explosives. To inspect the daddy's overlap of HW 1 in the roof of 1 I, an additional explosion of explosive charges is carried out with the help of a blast-hole charge of 12.1. files, 3 i-ui.

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The invention relates to the mining industry and can be used for underground mining of mineral deposits.

The purpose of the invention is to reduce the cost of building a jumper and increase its strength, as well as monitoring the completeness of production overlap.

Fig. 1 shows a diagram of machining operations with boreholes and boreholes prior to blasting of charges BR; fig. 2 - section A-A in FIG. 1 (after detonation of explosive charges); in FIG. 3 — section BB in FIG. 2.

From the overlapped production 1 create a drilled charge 2 adjustable

collisions in sides 3 and roof 4 of excavation 1, as well as altar charges 5 and 6, exploded, respectively, to form a skeleton: 7 of large pieces of rock and an isolation screen of 8 of small pieces. The side bridges formed by the explosives of explosives of explosives 9 serve to expand the body of the jumper and increase the resistance of the backfill array 10. To ensure that the jumper from the roof side 11 is inspected, an explosive charge exploded by explosives 12 .

The erection of the jumper by explosion is carried out as follows.

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about

 r ss

3.-1

The overlap of the output 1 in its sides 3 on the roof 4 is a hole of bore-holes with charges 2, providing a collision of the opposing flows of fighting mass. To lay the skeleton 7 at the beginning in the sides 3 of the working and its roof 4 explosives ishuric charges 2.

P (1 the study of coarse lumpiness is achieved by the impact of mini-lumpy volumes of rock mass in an explosion by one slowdown interval by one iimypy in the sides and roof of the excavation. The distance on which the full impact of the rock mass pieces is ensured is calculated by the formula

L 0.6V.

where i, v

AND

g

distance, m is the initial velocity of the piece of felled rock mass, m / s,

frame height, m, acceleration of free fall m / s2.

As the carcass overlaps, when the charge 6 is ejected and the screen 8 is created, the volume of the rock mass recovered increases, and at a higher level of energy from the impact of their flow, fine crushing is achieved. After the explosions of all charges 6, a body is formed, jumpers that are distributed to the side 9 to increase its stability at the head of the backfill array 10. Based on these requirements, passports for mining of the rock mass are made in the sides and tilted with the design of charge, where as a tamping agent, a holding substance is used, which in the process of blasting as charges 2 explode and melts, enveloping the pieces of rock mass and ensuring their bonding. The required volume of rock mass to form the body of the jumper is achieved by drilling depth of bore holes or

3A

With the magnitude of the number of lateral charges 2, in the sides of the 3rd roof 4, the output is 1. After completion of the formation,

jumpers in the roof 4 of the production 1 drill t inclined bore-holes, which, after the blast of blast-hole charges 12, provide access for inspection for completing the overlap of the working 1. If the volume

When the rock mass is laid in the body of the lintel, is insufficient and the required thrust is not reached, the holes in the roof of the excavation are additionally drilled and blown up.

After additional blasting, the quality of formation of the jumper is monitored as described.

Claims (2)

1. The method of erection of the jumper in the mountain working, which includes blasting through the drilling and blasting of roof rocks and the formation of these bulk bridges, bonding, pieces of rock bridges between themselves in a binder, are also distinguished by the fact that, in order to reduce the cost of erecting the bar and increase its strength, simultaneously with the breaking of roof rocks, the formation in the center of the frame lintel of large pieces of rock, and five along the edges of an insulating screen made of small pieces, and the binding of pieces of rock between them is done by placing a binder in the hole in the hole as the blockage of explosives .. f. 2. The method according to claim 1, characterized in that, in order to monitor the completeness of production overlap, after erecting the jumper, additional explosive charges are exploded in the roof of the excavation with the direction of rock mass breaking down on the jumper and forming an access to inspect it from above. GGGGTGGT  H AND 1 I 1.IT / I / I 555 .2 Fi.Z