SU1745857A1 - Device for drilling adjacent holes - Google Patents

Abstract

Use in the mining industry in explosive rock formations. Essence The device contains an immersion drummer and a guiding rod with a cutting element to destroy the interwell hole pillar. The surface of the cutting element facing the drummer is made of two intersecting intersecting surfaces between which in a horizontal cross section 110-150 ° C 9 Il.

Description

The invention relates to the mining industry, in particular, to devices for drilling adjacent wells, and can be used in underground mining of mineral deposits for blasting rock formations.

The purpose of the invention is to reduce the energy intensity of the drilling of conjugated wells due to the gradual destruction of the interwell pillar.

FIG. 1 shows a device for drilling adjacent wells in boreholes, general view; in fig. 2 and 3 - sections A-A and BB in FIG. one; in fig. 4 and 7 — node I in FIG. one; in Figures 5 and 8.6 and 9, sections C - D and 11-11, B-B and B - A in Figs. 4 and 7.

The device includes a submersible hammer 3 with a drill bit 4 connected to the column of hollow drill rods 1 through the adapter 2 to the adapter 2 by means of a bearing sleeve 5 through the bar

6, a tubular guide rod 7 is attached with a support 8 for the drummer 3 aligned with the cutting element 9, obstructed to the drummer 3, the side of which is made of two inclined surfaces 10 intersecting in a horizontal cross section at an angle of 110-150 ° and forming the blade 11, leading lateral edges 12 of the cutting element 9

A device for drilling adjacent wells works as follows

To drill the contiguous wells in the rock mass in its lower part, there is a cutting, and in the upper part - drilling mine workings

A drill machine from a drill is drilled in a known manner with an initial (pilot) drill of 13 g by output into the drill cutting after being removed from the well 13 6ypoeoio tool to the drill rod string 1 of the drilling machine by means of an adapter

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with

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4 SL 00

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2, attach the device, insert it with the guide rod 8 into the pilot well 13 and drill the associated well 14. At the same time, to ensure the operation of the drill bit 4, complete rock section 15 wells is left between the wells 13 and 14, which the process of deepening the conjugate well 14 is destroyed by the cutting element 9. An energy carrier (e.g., a pressurized air-water mixture) for operating the immersion hammer 3 during the drilling of the conjugate well 14 enters the column of hollow drill rods 1. Fragments of the rock ezhskvazhinnogo pillar 15 together in the drill cuttings, the sacrificial from under the crown 4 of used energy source, through the window 18 enters the channel of the guide rod 7 and the pilot hole 13 flows into the undercut production.

The destruction of the cross-hole breed pillar 15 occurs in two stages. First, he pressure force Rn. created by the force Rp of the cutting element 9 on the bottom of the borehole 14, the action of the blade 11 is divided by a crack 16 into two cantilevers 17, on which the transverse forces Rnn and the longitudinal forces Qn then act. The force Rnp of the cantilever 17 breaks over the surfaces 19, with the result that between the wells 13 and 14 a interwell hole is formed. greater than the width B of the cutting element 9, since its edges 12 are working at the last moment and make up the gap. With the same values of the force of supply of RP and the pressure force Rn. as well as the inclination of the blade 11 of the cutting element 9 with the grinding of the angle in the horizontal cross section between its inclined surfaces 10 within 110-150 ° acting on the cantilever 17 of the rear sight 15, the transverse axial forces and the longitudinal op forces vary within the allowable limits at which,

due to the low resistance of the rocks during bending during the gradual destruction of the interwell rock pillars 15, the forces required for its

removal, thereby reducing the energy intensity of the drilling of the conjugate well 14.

When the value of the angle in the horizontal section between the inclined surfaces is 10

more than 150 °, the two-stage destruction of the interwell rock breed pillar 15 is stopped. It is punctured by the cutting element 9 simultaneously on two surfaces 19 of an increased area in comparison

with a crack area of 16. As a result, the force required to remove the rear pillar 15 increases dramatically. When the angle in horizontal section between inclined surfaces 10 is less than 110 °, the longitudinal forces Qn acting on the cantilever 17 increase dramatically, resulting in good work of rocks Compression increases the force required to remove the rear pillar 15. As a result, as in the left.

so in the second case, due to the increase in the effort required to destroy the interwell rock breed 15, the energy intensity of drilling of the conjugate well 14 increases.

Claims (1)

Invention Formula A device for drilling adjacent wells, including an immersion hammer and a guide rod with a cutting element for destruction of the interwell well (pillar), characterized in that, in order to reduce the energy intensity of drilling due to the gradual destruction of the interwell well, the impactor surface of the cutting element is made of two intersecting inclined surfaces, the angle between which in the horizontal cross section is 110-150 °. BUT FIG. four L gyo you t gtЈ) with thirty П-О СО with 3 at WITH m I white space Fiz.8 / n / Bb