SU875046A1 - Method of working thin and medium-thick sloping ore bodies - Google Patents

Description

(54) METHOD FOR DEVELOPING A LARGE-DEPRESSED ORE BODY. / WELL AND MEDIUM POWER

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The invention relates to the mining industry and can be used. for underground mining of steeply dipping ore bodies of low and medium power using self-propelled equipment.

There is a method of mining steep ore bodies using self-propelled equipment with sublevel drifts. At the same time, self-propelled equipment in the subfloor Hbie drift is delivered along inclined workings (spiral transport congresses), passed parallel to the extension of the ore body through waste rocks (I.

The disadvantage of this method of treating ore bodies is the large amount of excavation work on the Breed, associated with the necessity of penetrating a spiral or inclined exit .. ts

There is also known a method of developing steep, top-down ore bodies of low and medium power, including the processing of chambers with inclined sublevel drifts, surmounted by self-propelled equipment, fixing ceilings of chambers and decorating a flat bottom 2.

The disadvantage of this method is a large amount of tunnel work.

large loss of ore and low labor safety.

The purpose of the invention is to reduce the amount of tunneling, loss of ore and increase safety.

The goal is achieved by the fact that, prior to breaking down the chamber stocks from the ventilation drift, down the borehole fans to the borders of the ceilings of the chambers, insert cables into them and fill them with a hardening solution, and inclined sublevel drifts pass from the races to the borders of the ceilings of the chambers, and the roofs of the chambers are blown up by fans of wells, which are drilled with a slope from the vertical in. the side of the blasting, and when the soil is contoured, the chambers are blown up by fans of wells that are tilted inclined towards the direction of the clearing recess.

FIG. 1 shows the scheme of mining operations along the strike of the ore body; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. I.

Initially, ventilation I and delivery 2 drifts, runs 3 and interblock uprising 4 are passed. Then, at an angle, overcome by self-propelled

equipment (approximately 9 °), passes directly from the races 3 sublevel drifts only up to the lower border of the under-rail rear sight 5. Parallel to this (before the start of cleaning work in the chamber) from the drift I down the drilling walls 6 (for example, KBU-50) t at a certain interval (approximately 2 m) of the fan of wells 7 for the entire (5-7 m) height of the future under-pillar 5. In the drilling wells, cables and fill in the cement mortar are inserted throughout their length. The construction of a cable mount in parallel with the preparatory-cut work increases the efficiency of mining. In addition, the erection of a cable fastener 7 in the podstrekovy pillar before the start of cleaning works in the chamber prevents the initial movement and separation of the fixed array, which is very important from the point of view of its further stability. While the erection of conventional barbing is done with some lagging behind the chest of the bottom, and the initial movement and stratification of the fixed array is not prevented, which reduces its steady state. .

The introduction of cable lining in advance (before the start of cleaning work) and the entire height of the fixed array (under-pillar) excludes the collapse of the ceiling of the chamber onto the back-up array 8, laid in the chamber through the masonry duchki 9, passed through its under-5 pillar fastening. Drilling ducts 9 are carried out in parallel with the development of the chamber reserves by sectional or simultaneous blasting of vertical wells drilled from the ventilation drift 1. After the cutting slot 10 has been cut, it is necessary to clean the mining reserves. At this plane, the fans of wells 11, drilled by self-propelled installation 12 from sublevel drifts 13, marking the roof and soil of the chamber, are arranged at an angle to the horizontal. The explosion of inclined fan wells eliminates crust formation (low roofing and overstating of the soil). In this case, the ANGLE of inclination of the plane of the fan wells to the horizontal depending on l. n with. is 62-70 ° C; With this in mind, there is no need for horizontal sections (upper and lower) of sublevel drifts, thereby reducing the amount of tunneling work and eliminating the design of exhaust duchek, and this, in turn, increases the safety of operations and reduces ore losses in the bottom of the chamber and in the roof crust .

Claims (2)

1. Voronyuk A.S. Types of ore deposits and options to open them depending on the combination of conditions of occurrence and mining factors. Sat “On the Theory of the Design of Underground Mining Enterprises, M., SPTGP IPE USSR, 1974, p. 30-33. 2.Divisenko I.P. et al. Changes in labor costs for the extraction of ore using self-propelled equipment. “Mining Journal, 1978, No. 7, p. 26-29. .f f Iff P // / / 3B7 /-one /