SU907256A1 - Method of mining steep ore bodies - Google Patents

Description

(54) METHOD FOR DEVELOPING A STEEPFALLING ORE BODIES

one

The invention relates to the mining industry and can be used in the underground mining of powerful steeply dipping ore bodies from the bottom upwards with the laying of the developed space with hardening mixtures.

There is a known method of mining powerful steeply dipping deposits with chambers with alternate excavation of chambers and quadrangular chamber pillars, which consist in breaking down ore with wells, usually drilled from subsurface orts, forming a cut-off slit and breaking ore into it by vertical layers, self-flowing ore through clearing || ) c) to the space and release of ore through the workings at the base of chamber 1.

The disadvantage of this method is the greater complexity of preparing the bottom due to the need for cutting the exhaust workings across the entire area of the block and the high dilution of the ore due to the presence of two contacts with host rocks in the hanging and lateral sides and their long exposure.

There is also a known method for developing steeply dipping ore bodies, which includes working the floors with cameras vertically ONE relative to the other half of the height of the floor, breaking up the chamber ore reserves with ascending and descending fans and setting the chambers with a hardening mixture 2.

The disadvantage of this method is the high cost of preparing the workings of the bottom and the relatively large dilution of the ore due to the exposure of both the hanging and the lying sides of the ore body.

The purpose of the invention is to reduce the cost of preparing the workings of the bottom and reducing the dilution of broken ore.

This goal is achieved by the fact that 15 chambers form in the form of isosceles triangles with their bases located on the lying and hanging sides of the ore body, and the vertices of the said chambers are directed opposite to each other, while working out floors from the bottom up.

FIG. 1 shows a vertical section on the design of the developed field; in fig. 2 shows section A-A in FIG. one.

Preparatory-rifled work includes the penetration of storey 1-3 and rising (not shown) workings.

For the production and delivery of ore from the mining chamber, in the floor drift 1, a complex of vibromechanisms is assembled, consisting of vibropitel 4, vibroconveyor 5, transporting the rock mass to the over-rising riser.

The development of the deposit is carried out with a flat dredging of reserves within the floor from the deposit center to the flanks, followed by laying the worked-out space with hardening mixtures and working the floors upwards.

The main technological processes of mining within the floor consist in: ore blasting deep wells, located as an upstream fan from floor drift 1 and downward from floor drift 3, and if one of the extreme wells in the fan 6 is parallel to contact with containing 7, at an angle of ° C to the horizon, which during the blasting process provides the chamber with the shape of an isosceles triangle and a full release of all broken ore to the exhaust output formed by the laying of the adjacent chamber and lateral rocks, the release of broken ore and its transportation using a set of vibro.mechanisms; filling the excavated space with a hardening pad to the soil of the ventilation drift 3, which makes it possible to use it when working on the overlying chamber.

Since the processes of ore production and laying of the mined-out space are technologically incompatible, we are working on one flank to lay the mined-out space, and on the other - the production of broken ore.

After working out the stocks within the floor, they start working out the stocks of the overlying floor.

The use of the proposed method makes it possible to refuse laborious operations of cutting exhaust workings and the subsequent extraction of stocks of the bottom and ceiling or the creation of artificial

sloping bottom-ceiling made of expensive concrete; to reduce the dilution by reducing the contact with the internal rocks from two - in hanging and lying side to one - in one of them, while changing their exposure and blasting the ore clearly

along the contour of the chamber (the extreme wells are located parallel to the contact m with the interfering rocks and bedding).

Claims (2)

1.Imenitov V.R. Underground mining processes in the development of ore deposits. M., "Nedra, 1978, p. 366. 2.Popov G. N. and others. On development systems with a cemented bookmark. - “Mining Journal, 1963, No. 9, p. 24-28 (prototype).