SU1751328A1 - Method of mining steep mineral seams of irregular bedding - Google Patents

Abstract

Use: A method of developing steeply dipping mineral deposits with unseasoned elements of the occurrence relates to the mining industry when developing formations with a drop of 40-90 °, more than 2.0 m thick, not sustained in power, dip angle, complicated by geological disturbances. SUMMARY OF THE INVENTION: The excavation field bounded by transport, ventilation drifts connected at the boundary by a ventilation furnace is divided by inclined sublevel drifts, traversed at an angle of 12-22 °, on which the grating is laid on the soil, which allows reducing the angle of fossil transportation under the action of its own mass. Cleaning works can be carried out in several sublevels at the same time. In the production of blasting, the pillar is left below the previously-worked roadway, and part of the section of the redeemed roadway, below the site of the explosion, is covered by a regiment. 3 il. s / s

Description

The invention relates to the mining industry and is intended to develop steep mineral deposits (40-90 °) with a capacity of more than 2.0 m, not sustained in thickness, angle of incidence, complicated by mining and geological disturbances.

There is a known method for developing steep seams, in which the floor is divided into sub-floors with dredging of coal by hydromonitors. The preparation of the floor for the clearing recess is carried out by one- or two-sided excavation fields by passing sublevel drifts with an angle of 5 ° to the pulp-drain furnace. The angle is removed by the gates without attaching the cleaning space from the boundaries of the site to the slope.

There is a method for developing steep seams, in which a floor is subdivided

After 6-8 m of subsurface drifts, passed horizontally to the db of the borders of the excavation site, the fossil is crushed by drilling and blasting operations back to the inter-horizontal slopes, while the cleaning works are carried out ahead of the overlying substage. The transportation of the fossil by the subsurface shaft, the EC, is carried out by conveyors. To shorten the transportation route of the fossil, subsurface drifts are connected after 5-30 meters with carbon furnaces.

The disadvantages of the method are high labor and material consumption during the development workings and their large specific volume and extent, the absence of mechanization, large operational losses, low technical and economic indicators.

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The aim of the invention is to increase the load on the working face, reducing the cost of production.

The goal is achieved by the fact that in the method of developing steep seams with unseasoned elements from the floor excavation up to the borders of the excavation section (ventilation drift), a system of parallel sublevel drifts with a minimum inclination angle is provided, providing transportation of the recovered fossil on artificially coated metal sheets, cleaning works are carried out with the help of blasting operations by blasting a well weyer (bore-hole) drilled with the calculation of the fossil pill remaining under the above with the drift, while the section of the sublevel drift below the bottom before the blasting operations is overlapped by the regiment, and metal sheets (pan panes) laid on the drift soil enter the cleaning space and take the broken mineral that is transported to floor drift and further loading.

FIG. 1 is a diagram of the preparation of a two-storied wet sand floor using inclined sublevel drifts; in fig. 2 - cleaning face of an inclined sublevel drift; in fig. 3 shows a section BB in FIG. 2.h

The method is carried out as follows.

A section of the deposit is opened by a haulage 1 and a ventilating 2 cvershlag. From crosscut 1, there is a segment of the floor drift 3 to mate with a sloped underfloor drift 5. Depending on the physical and technical properties of the fossil and the type of metal grooves used during sinking and operation, the slope of the sublevel drift to the horizon is from 12 (enameled pan) or 18 (steel) to 22 °. The angle of inclination of the sublevel drifts allows the use of driving machines. After the sublevel drift is made to the ventilation horizon, from the Kvershlag 2, the ventilation drift 4 is passed (advanced penetration is possible). The order of work is maintained until the end of the preparation of the excavation wing. Inclined sublevel drifts on the border of the excavation section are knocked together by a ventilation oven b to form aeration due to a general depression,

Mine is excavated by blasting. In the face of the sloping sublevel drift burits weyer holes 7, while experienced

This sets the length of the holes, which allows the entire fossil 8 to be saved below the above-developed subsurface drift, to prevent the breakthrough of the broken rocks into the bottom hole. Before blasting, a portion of the cross-section of the drift road below the explosion site is overlapped by the regiment 9. This eliminates the transportation of the broken rock mass under its own weight on metal grates.

After blasting, the shelves are disassembled and the production of the recovered fossil begins, which is transported along the pans to the storey roadway and further to the local loading. The stationary pan 10, remaining in the developed space, take on a broken fossil. In the event of the collapse of the host rocks by becoming a rack, the winch is removed

from the dam, the breast of the slab overlaps, the fossil pillars are left, the new stope is dissected 11, the cleaning works are carried out in the downward order with the advancing movement of the faces of the overlying drifts.

The cutting of the second wing of the excavation section is carried out with the inclination of the bolts in the opposite direction,

Inclined sublevel drifts pass through 7-10 m.

Claims (1)

Invention Formula A method for developing steeply dipping seams of minerals with unperturbed bedding elements, including ventilation and transport workings, connecting boundary workings, a system of parallel sublevel drifts, the cleaning of them by means of drilling and blasting operations, characterized in that increase the load on the working face, reduce the cost of production, sublevel drifts are carried out with an inclination angle of 12-22 °, equipped with coated sheets, to reduce the angle while cleaning stopping below the above-developed sub-floor, before performing the blasting operations, part of the section of the redeemed drift is below the explosion site. A-A  I In Figz