SU989073A1 - Method of driving ascending workings - Google Patents

Description

(54) PASSAGE METHOD OF BOSSES X BfcJPABOTOK

FIELD OF THE INVENTION The invention relates to mining, in particular, to excavation of excavation workings in the development of minerals using drilling and blasting operations.

There is a known method of penetration with the formation of the cut-in cavity, which includes drilling to the full depth, charging and blasting the central and lateral cutting, blasting and delineating wells, in which the lateral wells are charged to the full depth, and the central bottom charge exploding at the moment of the array displacement explosion of charges of side holes of oil holes

However, the bulk of the rock that is fought off by side hole wells shifts to the surface of the central hole well and is limited to its volume. This limits the volume of the cut-in cavity created and, with the explosion of blast-off and windows of the drilling wells, leads to the pressing of the rock into the mine.

The closest in technical essence and the achieved result to the invention is another well-known method, including drilling central and lateral cut wells, firing wells and delineating wells, charging side wells with dispersed charges and blasting charges in blasting holes and delineating wells after blasting charges in iron cuttings wells 2.

The disadvantage of this method, as well as the first one, is the pressing in of the rock during the formation of the iron ore.

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The purpose of the invention is to increase efficiency by preventing the compression of the rock.

.. The goal is reached

15 by the fact that, in a known method, distributed charges of lateral cutting holes (wells are blown up and slowed down from the bottom after charging charges in central hole wells.

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FIG. 1 shows a plan of location-. no wells during development; figure 2 - section aa in figure 1.

The method is carried out as follows.

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At the location of the development mark points for drilling wells. The central 1, 2 and lateral 3 cut-in, fender 4 and contoured 5 wells are drilled using the full design

30 height of work. After

drilling out the array, all the wells are charged at one time, for example, in the following order: a well 6 is inserted into the well 1 at a level of 2/3 of its height from paper or other material and charged with explosive 7; well 1 - from the base of the plug b to the level of the stemming 8 well 2 - from the bottom to the level of the sample base | and b 7 wells 3-5 - from bottom to bottom level.

In wells 3, explosive 7 is dispersed by damming 8 for separate charges. The fighters 9 in the charges are installed in wells 1 3 first from dabo, and in-, wells 4 and 5 - first from the mouth of the well.

Blasting wells produced in one step. The first are the charges in well 1 and with deceleration, starting from the bottom one, the charges of one of the wells 3 and the charges of the other well 3. After the explosion of the last charge in wells 3, the charges of slowing down the charges of the fender 4 and contour 5 wells are activated. When blasting wells 1 and 2 in the center of the excavation, a vruhov gap is formed over its entire height. By blasting the charges of wells 3, this slit expands to the design pa3Mef) OB and the next blasting of the charges of wells 4 and 5 bounces off the rock along the contour of the mine.

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Charging and blasting immediately to the full height of the wells eliminates multiple repetition of these operations and, as a result, reduces the labor intensity of workings, 1.5-2 times, increases safety and simplifies penetration technology.

Claims (1)

1. USSR author's certificate No. 724730, class, E 21 C 37/00., 1978, 2. Chuprunov GD Carrying out and fastening of mine workings, m., Gosgortekhiedat, 1960, s, 316-317 (prototype).