SU1687785A1 - A method of preparing flooded rock for mining - Google Patents

Abstract

This invention relates to mining promet. The goal is to increase the efficiency of drilling and blasting operations by reducing the water content of the exploded array. A series of horizontal drainage wells is drilled in the slope of the underlying ledge over the full width of the prepared step. Vertical blastholes are drilled in transverse rows. Each transverse row of wells is located in the same plane as the horizontal drainage well, after which vertical explosive wells are charged and blown up, excavated and transported blasted rocks on the scarp transport platform. To eliminate the effect of groundwater in an explosive array, which would allow replacing expensive waterproof explosives with much cheaper non-resistant materials, they pre-dry the explosive block. The number of wells is determined by the groundwater level in the drained massif. The intensity of the drainage can be increased by drilling an additional number of horizontal wells 1. Il. with

Description

The invention relates to the mining industry and can be used in the development of watered rocks.

The purpose of the invention is to increase the efficiency of preparation for drilling and blasting operations by reducing the water content of the exploding array.

The method is carried out as follows.

The ledges 1, cut into an array of flooded rocks, are worked out successively from top to bottom by explosive blocks 2. Rocky flooded mountain

rocks constitute a significant proportion of the rocks being mined by the open method. In connection with the increase in the depth of the quarries, their long-term growth is constantly increasing. The training of the explosive unit 2 is carried out by longitudinal 3 and transverse 4 rows of wells according to the intended grid of explosive wells, the parameters of which are established on the basis of a preliminary calculation. Explosive wells pass from the top down from the top of the ledge under development. After that, the vertical explosive wells are charged and blown up.

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we. Excar.yug and transport ppor bath rocks on the transport platform of the ledge. In order to eliminate the effect of groundwater in the exploding massif, which would make it possible to replace expensive waterproof explosives with much cheaper non-resistant pre-dried explosive unit2. For this purpose, the lower ledge 5 is loaded from the side of its slope 6. The drilling is carried out by horizontal wells 7 in one row 8 of the parallel side lower edge of the slope of the lower ledge 9 above the level of its lower platform 10. The smoking of the lower ledge is carried out before carrying out plots of the developed ledge of vertical wells. Horizontal wells serve to drain water from the rock mass produced. Through horizontal wells, groundwater flows into the lower platform of the underlying ledge, and a depression funnel forms, which captures the development block. In order to make the most efficient use of a network of horizontal wells, horizontal wells are located within the boundaries of the vertical projection of the explosive block 2 onto the underlying horizon 5. Each row of transverse vertical wells 4, which are led from the top of the ledge within the boundaries of the explosive block, planes (vertical) with a horizontal well 7. This provides the most advantageous location of the explosive block 2 relative to the depression funnel formed

In addition, the layout of cross-sectional rhdon blasting cleats 4 relative to the deprotection porons of each corresponding horizontal well 7 is optimized. The location of horizontal wells 7 on the lower ledge is caused by the need to create a depression funnel that completely captures all the explosive wells worked out block 2 at their full length.

The number of wells is determined by the level of groundwater in the dry massif (the lower it is, the smaller the number of wells). The intensity of drainage can be increased by drilling an additional number of horizontal wells.

Claims (1)

Invention Formula A method of preparing flooded rocks for development, including drilling a series of horizontal drainage wells in the escarpment slope and vertical blastholes r, the upper platform of the ledge and draining water, characterized in that, in order to increase the efficiency of drilling and blasting operations by reducing the water content of the exploded array, horizontal drainage wells are drilled in the slope of the underlying ledge for the entire width of the prepared ledge, and drilling of vertical blastholes are carried out in transverse rows, and Each transverse wellbore row is positioned in the same plane as the horizontal drain bar.