SU1461937A1 - Method of mining ore bodies - Google Patents

Abstract

The invention relates to the mining industry. The goal is to reduce the cost of mining ore by reducing its losses and dilution by increasing the seismic and blasting stability of the outcrops in the chamber. By contact of ore 1 and lightweight rocks 2 passes the upper split vaulted excavation 3, and by contact of ore 1 and the underlying 10 rocks 5 - lower split vaulted excavation 4. When penetrating production 3 through its entire spine in the roof 10 by successive formation of direct 7 and i the reverse 8 semi-arches form transverse grooves 9, as one side to the other. At the end of the excavation of workings 3 and 4, out of the 4 wells (C), 12 drill the ore 1 within the bounding chamber (K) 13. Initially, they beat off the formed cut-off slot in K13 € 12 spread Proposition row in the fan 14, and then discourage C12 disposed in the fan row 15. With such short-delay blasting C12 cyclic form an arched roof 10, K13 and transverse furrows 9 extend over the entire width K13. In this case, a wave-like shape of the side walls K13 is formed with a gradual decrease in the depth of the furrows from the roof K13 to its soil to the formation of flat side walls at the base of K13. After complete cutting off and shipment of ore 1 from K13, the above-labeled space is isolated and laid with a hardening mixture, 5 sludge. , 2 G fO (L Od with ff

Description

The invention relates to the mining industry and can be used in the development of mineral deposits by cameral mining systems with the laying of the excavated space with hardened mixtures.

The purpose of the invention is to reduce the cost of ore extraction by reducing its loss and dilution by increasing the seismic and explosive stability of exposures in the chamber.

Ya fig, 1 shows the ore body, a longitudinal section; in fig. 2 - section A-A in FIG. one; in fig. 3 - cut. BB in FIG. 2; in fig. 4 is a section bb of FIG. 2I in FIG. 5 - top clearance when it penetrates, a longitudinal section along the axis.

FIG. 1-5, ore 1 and overburden 2 are shown, the upper section is mined 3 and the lower section is 4, the underlying rocks 5, window holes 6, straight 7 and reverse 8 semi-pipes, transverse grooves 9 in the roof 10, excavated 3, bars 11 wells 12 when the chamber 13 is crushed, located in fan rows 14 and 15, the side walls 16 of the chamber 13, the transverse grooves 17 in the side walls 16 of the chamber 13, flat side walls 18 near the soil of the chamber 13, hardening mixture (concrete) 19 and bore holes 20,

The method is carried out as follows.

. By the contact of ore 1 and light rocks 2, the upper split vaulted excavation 3 passes, and by the contact of ore 1 and underlying rocks 5 - the lower split vaulted excavation 4. When penetrating the excavation 3, drill the rocks 2 to a depth sufficient to forming a direct half-watering angle 7 inclined at a seismic angle reflecting the blast waves. A subsequent excavation cycle of excavation 3 is drilled at a seismic safe angle to the front of the blast wave another part of the rocks 2 in the zone of transverse furrow 9, as a result of which they form a reverse semi-arch. Then, with a further passage of development 3, 10 straight lines are formed in its top. 7 and reverse 8 semi-arches, i.e. over the entire length of excavation 3 in its roof 10, successive formation of forward 7 and inverse 8 half arches is formed by adjacent transverse grooves 9, the maximum depth of which is determined by the formula

h (0.1-0.4) b,

where h is the maximum depth

transverse furrow, m; b — width of the transverse furrow, m;

(0.1-0.4) are the coefficients providing reflection of explosive waves from inclined planes of transverse furrows at angles of 50-80.

The formed wave-like roof 10 of the excavation 3 is strengthened by rods 11. After completion of the excavation of the excavations 3 and 4 from the lower split section 4 wells 12 drill the ore 1 within the boundaries of the beating chamber 1 At the same time, the 12. located in the fan row 14, drills for the contact plane of ore 1 and overburden 2 by the value (O, 1-0.4) “b, and wells 12, located in the fan row 15, drilled to the contact plane of ore 1 and overlay 1x rocks 2 within the boundaries of the design contour of the breaking of chamber 13. The wells 12, located in the fan row 14, are drilled in the direction of the formation of the side walls 16 and pereburivat for the plane of the design contour of the breaking of chamber 13 by h (Q, 1-0, 4) b with a decrease in the amount of re-drilling from the roof 10 of the chamber 13 to its soil, with the wells 12 located in fan rows 14 and 15 at the base of the chamber 13 are drilled to the border of the design contour of the breakout of chamber 13. Initially, wells 12 located in the fan row 14 are beaten off into the cut-out slot in chamber 13, and then wells 12, located in the fan row 15, are beaten off. cycling short-delayed outburst of wells 12 form a vaulted roof 10 in chamber 13 and extend transverse grooves 9 over the entire width of chamber 13, simultaneously form transverse grooves 17 in the side walls 16 of chamber 13. At the same time, they form a wave-like shape of the roof 10 chambers 13, Perez od - boiling in the wave shape of the side walls 16 of the chamber 13 with a gradual

by decreasing the depths of the transverse furrow 17 from the top of the chamber to its soil to the formation of flat side walls 1 at the base of chamber 13. After the ore 1 has been completely removed from chamber 13, the developed space is isolated and laid with a hardening mixture of mixture 19.

An example of the implementation of the method when mining ore body with a capacity of 15 m

On the contact of the ore .1 and overburden 2, the upper split vaulted excavation 3 with a section of 3.9 m passes through the contact of ore 1 and the underlying rocks 5 - the lower split vaulted excavation 4 with a section of 14.5 m. When penetrating the excavation 3 inclined at an angle of 20 to the horizon, contouring boreholes 6 with a diameter of 42 mm drill rocks 2 to a depth of 1.5 m. In case of explosive demolition, the sprigs 6 form a semi-semi-arbor 7 with a length of 1.5 m along the working length 3. The subsequent cycle of penetration makes the contour working output 3 boreholes 6 with a diameter 42 mm are drilled with a length of 1.5 m in the plane to Ontakta ore 1 and overlay rocks 2 i.e. in the production of this cycping excavation, production 3 is carried out with a constant height of 2.1 m. Then, the previous cycle of excavation of production 3 is repeated, after which production 3 with a constant height of 2.1 m is carried out and the baffle boards are bored at an angle of 20 k the horizon of the shtsury 20, between the two formed half arches 7. After the breaking of the holes 20, they form a reverse half arbor 8 in the roof 10 of the generation 3, i.e over the entire length of excavation 3 in its roof 10, successive formation of forward 7 and inverse 8 slantings form transverse grooves 9 adjacent to each other, of depth h 0.2–3–0.6 m, width b 3 m. 3 reinforce with rods 11 The broken ore from mine 3 is shipped with a scraper to the ore pass. At the end of the excavation of the workings 3 and 4 from the lower split production 4, the Fan-Drill drilling rig drills 12 holes with a diameter of 42 mm and a length of 2.3-16.5 m in ore 1 within the design boundaries of the blasting contour of chamber 13. The location of wells 12 is a fan The distance between the ranks of 14 and 15 fans is 1.5 m, i.e. half

0

five

the width of the transverse furrow 9. At the same time, the wells 12, located in the fan-shaped row 14, are drilled beyond the contact plane of ore 1 and overlapping; their rocks 2 are 0.6 m, and the wells 12, located in the fan-row row 15, to the plane of contact of the ore 1 and overburden 2 in the granuli of the design contour of the chamber breakdown 13. The wells 12, located in the fan row 14, are drilled in the direction of formation of the side walls 16 and re-drilled beyond the plane of the design contour of the chamber breakdown 13 by an amount of 0.6 m with a gradual decrease in perebor size from 0.6 m at the roof 10 of the chamber 13 d about 0.2m to its soil, with the wells 12, located in fan rows 14 and 15

Q at the base of chamber 13 is drilled with a length of 2.3 m and a diameter of 42 mm to the border of the design contour of the chamber breakage 13. Initially, wells 12, located in the fan row 14, are sounded in the cut-out slot in chamber 13, and then the wells 12, located in the fan range of 15. With such cyclic short-coalesced blasting of wells 12

0 form the vaulted roof 10 in the chamber 13 and extend the transverse grooves 9 over the entire width of the chamber 13, simultaneously form transverse furrows 17 in the side walls 16 of the chamber 13. At the same time they form a wave-like shape of the roof 10 of the chamber 13, which transforms into a wave-like shape of the side walls 16 chambers 13 with a gradual decrease in the depth of the transverse furrows 17 6t 0.6 m at the roof 10 of the chamber 13 to 0.2 m to its soil. After complete cutting off and shipment of ore 1 from chamber 13, the above labeled space is insulated and laid with concrete 19 of grade 40 of the ASC.

five

0

five

Claims (1)

Invention Formula The method of mining ore bodies, inclusions, penetration of the ore body in the top and bottom, respectively, of the upper and lower split vaulted workings, drilling of ore within the chamber from the lower split production, cyclic drilling and drilling breaking and shipment in the chamber with the formation of arches in the roof of the chamber with subsequent a camera tab different so that, in order to reduce the cost of mining ore by reducing its loss and dilution by increasing the seismic-blasting stability of the outcrops in the chamber, when penetrating the upper split production by sequential formation of forward and inverse Half-Arches they form transverse grooves in the roof 1A61937 - all of its Shch1in (then, as the ore is crushed in the chamber, the said furrows are formed over the entire width of the roof and in the side walls of the chamber with a wavy surface with a decrease in the depth of the furrows in the side walls of the chamber from its roof to the soil to form a flat surface of the side walls of the soil chamber . ten / J / 7 / J FIG. k AT 8