SU1460273A1 - Method of combination mining of mineral deposits - Google Patents

Abstract

The invention relates to the mining industry. The purpose of the invention is to increase the development efficiency by increasing the share of ore mining by the open method. In the zone of collapse of underground mining, open-pit mining is carried out with the formation of benches, together with underground mining works. Underground work under the ledges of the quarry work in the bottom of the stage. For this, they are divided into compensation chambers and temporary pillars. First of all, after excavation of haulage preparatory and rifled workings, it is drilled, beaten and produced ore from the compression chambers. Simultaneous ved; t drilling in temporary pillars. Zate.m mass explosion bring down the pillars i; overlaid rocks. The collapse, developing, comes to the ledge of the quarry, and the mass that has been blown up and crushed, increasing in volume, creates a backwater to the crushed rocks, retaining the surface of the ledge. The volume of rock loosened during a mass explosion and the volume of the compensation space are determined by the formulas given in the invention. Then, simultaneously with the continuation of mining in the quarry, ore is mined in above-ground workings. The rate of ore output corresponds to the rate of backfilling of the craters of the collapse. 1, I am JB

Description

one

The invention relates to the mining industry and can be used in the joint development of deposits by open and underground methods.

The purpose of the invention is to increase development efficiency by increasing the share of ore mining by the open method.

The method is carried out as follows.

The underground blocks under the pit ledges are worked out in two stages, for which they are divided into compensation chambers and temporary pillars. In the first stage, after passage, the haulage, preparatory and rifled workings are drilled, beaten and produced ore from the compensation chambers. At the same time, drilling wells in temporary pillars. Then to the second stage

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mass explosion bring down the bred pillars and forcibly or due to self-destruction overburden rocks. The volume of temporary pillars and compensation space (compensation chambers plus threaded workings) is determined by the formulas

H (,) / K ,;

(K, l) + (.

where Kj is the volume of temporary pillars brought down by a massive explosion; 1 — geometric volume of the cavity from the bottom of the block to the surface (collapse funnel); overlap rock volume; ore disintegration coefficients and

breeds;

 volume of compensation space.

ABOUT

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picking up ycTviui of the quarry, and the blasted and collapsed mountain mass, increasing in volume due to loosening, creates backwater to the fractured rocks, fills the entire collapse funnel, preventing the formation of a sinkhole funnel and preserving the surface of the ledge to maintain him mining work.

Then, simultaneously with the continuation of mining in the quarry, ore is mined in underground mines. The resulting ore from the ore on the ledge surface of the sagging trough systematically fall asleep with the rock mass from mining operations in

maintenance of open work in a quarry with the formation of ledges in conjunction with underground work, the creation of compensatory spaces, the formation of temporary pelic, massive explosions, the overburden of overburden, the formation of a zone of collapse, the repayment of pillars, the release and shipment of ore, characterized by in order to increase the development efficiency, by increasing the share of ore mining by the open method, open mining operations, together with underground mining, are carried out in the zone of s work, with benches propped loosened during mass

the quarry, maintaining the level of the surface of the 15 rock explosion, the volume of which and the volume of the comustun before the complete development of its reserves, including the area of the collapse funnel, without leaving any pillars that would otherwise have to work on underground workings.

Survey control funnel is established for the condition of the crater and, depending on the intensity of the backfill (volume), the daily, daily, replacement dose is determined, i.e. release lead with the speed of backfilling.

In the particular case when the overburden is also ore, the reflow principle does not change, only the coefficients of loosening are equal, and the breaking of overburden is only mandatory.

Claims (1)

Invention Formula (The method of combined mining of mineral deposits, including 20 25 thirty the sensation space is determined by formulas V (V-V.K,) / K ;; Uh Un (K, -1) + U „(K., - 1), where Kj is the volume of temporary pillars brought down by a massive explosion; V is the geometric volume of the cavity from the bottom of the block to the surface (collapse funnel); overlap rock volume; K ,, K, - coefficients of loosening of ore and overburden; 14- volume of compensation space, and the release of ore from underground workings is carried out at a speed corresponding to the speed of backfilling of the craters. maintenance of open work in a quarry with the formation of ledges in conjunction with underground work, the creation of compensatory spaces, the formation of temporary pelic, massive explosions, the overburden of overburden, the formation of a zone of collapse, the repayment of pillars, the release and shipment of ore, characterized by in order to increase the development efficiency, by increasing the share of ore mining by the open method, open mining operations, together with underground mining, are carried out in the zone of s work, with benches propped loosened during mass 5 explosion of rock, the volume of which and the volume of com five 0 the sensation space is determined by formulas V (V-V.K,) / K ;; Uh Un (K, -1) + U „(K., - 1), where Kj is the volume of temporary pillars brought down by a massive explosion; V is the geometric volume of the cavity from the bottom of the block to the surface (collapse funnel); overlap rock volume; K ,, K, - coefficients of loosening of ore and overburden; 14- volume of compensation space, and the release of ore from underground workings is carried out at a speed corresponding to the speed of backfilling of the craters.