SU1025886A1 - Method of working the marging-adjoining zone of an open mine - Google Patents

Abstract

THE METHOD OF DEVELOPING THE CERACIOUS ACCESSORIAL CAREER, including drilling and charging the loosening wells and wells of the contour row, breaking the main volume of the rocks of the marginal zone and the safety tape adjacent to the contour plane, is such that, in order to reduce the costs of drilling and drilling, there is a hole in the contour, with the purpose of reducing the costs of drilling and drilling masses. the belt is worked out simultaneously with the blasting of contour row wells, and the distance between the contour row wells is 1.5-2.0 times. the distance from the wells to the free surface, the image bath after disruption of the main volume and the load per one row skyazhinu contour at $ 35- 40% less friable wells load (L or -..

Description

The invention relates to mining and can be used for blasting when ejecting the ledges of the open side of the quarry. .

There is a known method for working out rocky rocks in recesses in two stages, including excavation of the excavation core by the method of borehole charges, breaking the protective layer partly using the hole method, partially manually using 10 hammers. Ξ1j.

The disadvantages of the method are the high cost of manual labor during breaking of the protective layer remaining between the removed core and the design contour of the excavation D5 and the low productivity of mining with the blast hole method. The closest to the proposed technical essence and the achieved result is a method of working out the contour zone of the quarry, including drilling and charging of loosening and contour hole wells, breaking the bulk of the rocks of the contour ZONE and a safety tape adjacent ²³ to the contour plane [2],

However, this method is characterized by high costs for drilling contour series wells that are not involved in the crushing of rock mass of the near-boundary zone.

The purpose of the invention is to reduce the cost of drilling and blasting.

This goal is achieved by the fact that in the known method of mining 35 near-edge eons of the quarry, including drilling and recharging wells ~. contouring and wells of the contour row, breaking the bulk of the rocks of the near-contour zone and the safety tape adjacent to the plane of the contour, the safety tape is worked out simultaneously with the blasting of the contour series wells, and the distance between the wells of 45 contour series is 1.52.0 times less than the distance from the wells to the free surface formed after the destruction of the main volume, and the load on one well ^{4 of the} contour row is 35-40% less than the load on the loosening wells.

Figure 1 and figure 2 shows a diagram of a blasting operation.

The diagram shows the design 'contour 1 of the excavation, the main volume 2 of the contour zone, safety tape 3, an array 4 of an inoperative ledge, 5 loosening wells,' 6 contour row wells.

The method is as follows.

Work out the main volume 2 of the marginal zone by the method of blasting vertical borehole loosening charges, followed by cleaning the destroyed mass. The diameter of the loosening wells is 214-269 mm and the depth is 18-20 m. · The load (mining area) on the loosening well is 50-60 m ⁴ .

After working out the main volume of the near-boundary zone, a pre-storage tape 3 of rocks with a thickness of 6-7 m remains, which perceives the effect of the explosion of 5 loosening wells and prevents the non-working part of the side located beyond the plane of circuit 1 from destruction.

To work out the safety tape 3 in the plane of circuit 1, inclined wells 6 of the contour row are drilled at a distance from each other 1.5-2 times less than the distance from the wells to the free surface, i.e. accept the distance between the wells 3-3.5 m, and the load on one well 18-24 m * ² ·, which is 35-40% of the load on the loosening wells 5.

The invention allows to reduce the cost of drilling operations, increase the yield of rock mass from 1 p.m.

VNIIIPI Order 4522/28

Circulation 603 Subscription

Branch of PPP Patent,

Uzhhorod, Project 4,

Claims (1)

METHOD FOR WORKING A QUARTER TOWARDS AREA, 'including drilling and charging loosening and contour boreholes, breaking off the bulk of the rocks of the near-edge aeon and a protective tape adjacent to the contour plane, characterized in that, in order to reduce the cost of drilling and blasting, • safety tape is being worked out simultaneously with blasting the contour row wells, and the distance between the contour row wells is taken 1.5-2.0 times. Less than the distance from the wells to the free surface formed th after the destruction of the main volume and load per skyazhinu contour series on 35- $ 40% less load wells ryhle- | niya ·. If