SU1328549A1 - Method of driving workings close to outburst-hazardous rock - Google Patents

Abstract

The invention relates to the mining industry, increases the efficiency and safety of excavation by increasing the stress relief zone of the rock mass. Preparatory generation 1 close. Outburst rock formations 2 is carried out by drilling and blasting. Boreholes in the mine face are drilled and arranged in parallel to the bedding. The blasting of explosive charges in boreholes is done in layers at the same time in each layer and injected from the layer furthest from the outburst rocks. The reservoir is divided into categories of outburst hazard and for each category of outburst the power of the safety layer 3 is set. With layer-by-layer blasting, stresses are gradually unloaded. After explosive charges, bore-holes are drilled in the safety layer. Into the bore-holes there is pumped out the bottom solution, and between the boreholes they install anchors 7. 1 c.p. f-ly, 2 ill. w S / S soy 00 ate 4 CO

Description

The invention relates to the mining industry 11 "11" (; L |;;;; -udet. Used iipir excavation work near iib 6i ocooriac ifcix rocks ;.

lioji): i) j.,; p; TCMi; i / t .- iovovvggpe-geysukt-ip Yusug ;: and to conduct safety of BupauoTrjK by increasing the zone of unloading of the mountain massif from the area,

FIG. a workout is shown, carried out near the outburst of danger, general view; in fig. 2 - section aa on fkg.1,

The process of ossucess is the following way.

no ;; i; roToruri iMniiK: i ty. factory 1 is being drilled; iy; in the way near outburst tolidi 2 rocks, which are located at a distance from the preparatory mine: less than 5 m, usually using a protective layer 3 ". For dredging the hole 4 for explosive material, strings that are spawned;: - 1st stage parallel to the breeding of rocks so that, as a result of this, the layer of 5 rocks is built up. The amount of iinypoB and the weight of the charge, and consequently, the number of layers, are determined according to the existing rules. In the layer of the charge, initiation is initiated with one series of deceleration. Blasting starts from the rock layer furthest from the outburst hazardous layer. Thus, in horizontal positioning, blasting starts from the excavation point. The latter vzryp} zayut - located in the layer closest to the outburst, in the case of a gentle fall - 40 in the making of explosives

in the roof of production. Since outburst rocks have a different degree of outburst hazard, which determines the intensity of rock and gas emission, which is determined by the standard criterion B, the last layer is at 57/0.8 at a distance of at least 5 m; at, 8 - at a distance of not less than 3 m; at, 6 at a distance of not less than 2 m.

The possibility of decreasing the thickness of the protective layer with snooky and the degree of emission of rocks has been proven to be excimer: 11 times in the mine

conditions . /

Of uasoiifi.ij- ,; : a single shawl (of the ncpo.-i layer) in the ropiiOM array is suitable for unloading and degassing near it ;; -; whether, therefore, with such a layer

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by sequential blasting of the prp ohruplets of packages O:) Scodit is gradually unloading stresses and outgassing of the outburst-hazardous layer and rocks of the safety layer, which excludes the possibility of the occurrence of rock and gas emissions. At the same time, additional outflow measures are not required, since the unloading process is an integral part of the technological cycle of excavation of mine workings, which also leads to an increase in the rate of mine workings.

After blasting sets of charges, bore-6 holes are drilled into the safety: 3, all its power and length:; 7) This operation is necessary, since when excavations are drilled by the drilling and blasting method, there is always a discontinuity of rocks 25 cracks, which weakens the protective layer. dumps may occur. The tamping and anchoring of the pre-fringing layer produced by a dement-sand mortar or other joint materials.

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thirty

Formulas

from gain

Claims (2)

1 o A method for carrying out workings near outburst-hazardous rocks, including, drilling in the bottomhole of a mine and in the pre-protective layer of bore-hole rocks and blasting in holes in cycles in the mode of short-delay blasting, characterized in that, in order to increase the efficiency and safety of excavations by increasing the unloading zone of the mountain massif from stresses, the charging of explosives in the boreholes is done in layers Home layer, starting from the layer furthest from outburst rocks, the orientation of the layers is parallel to the bedding layer, with the reservoir divided into categories of outbreak hazards, and the thickness of the safety layer is set to each outbreak category. 2. The method according to p. I, about tl to h and u and with the fact that in each cycle 1328549 in the drilled in the safety, the thief, and between the holes in the layer are installed, the holes are injected with tamponage and anchors. : 1V /; 0 y: x:: t: .Y ::: -: .. 7: Ouch :::; oh oh oh oh oh Editor I.Nikolaychuk .The compiler G.Vasyuchkova Tehred I.Veres Order 3465/37 Circulation 429 Subscription VNII1Sh State Committee of the USSR for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, ul.Proektna, 4 About About About About oh oh oh oh oh t . ./ Proofreader A.Zimokosov