RU1819998C - Method for extraction of steeply dipping ore bodies of small and medium thickness and filling of worked out spaces - Google Patents

Abstract

The invention relates to the mining industry and can be used in underground mining of steeply dipping ore bodies of small and medium power with a developed mining tab. The invention relates to mining and can be used in mining of deposits with a developed mining space deposit. The aim of the invention is to reduce the loss of minerals, reduce the number of backfill workings, reduce the consumption of cementitious material. In FIG. 1 shows a section of the chambers along strike; in FIG. 2 - cross section of the chamber across the strike, where 1 - bypass gap, 2 - empty rocks; 3 - artificial ceiling, 4 - blast holes. After excavating the chamber, an artificial ceiling 3 is erected by filling the lower part of the mined space with a hardening mixture to a height of 0.8 chamber widths. wanderings. The goal is to reduce the loss of minerals and increase the stability of the rocks of the hanging side. The ore body is mined by chambers (K) with a width equal to the power of the ore body. To adjacent areas along the strike, a vertical peg is arranged with respect to each other. Spent K is filled with a hardening tab, creating a hardened layer (CSS) in their lower part. (The remainder of K is filled with waste rock. After mining the underlying K and creating in it, the CSS of the overlying K is drilled with wells by digging into the CSS to form a bypass gap across the ore body stretch. Through the indicated bypass gap, the mined-out space is re-laid by bypassing the empty rock from overlying K into the underlying ones. 2 ill. To form a bypass gap 1 in a hardened filling mixture, drill; a set of wells 4. By blasting wells, -1 charges will form a gap through which rock moves under its own weight from the upper chamber to the lower, completely free part of the chamber. Thus, filling of the worked-out space is carried out by hardening and loose filling, i.e. a combined filling array is formed. Using the proposed method will reduce the loss of minerals due to its more complete extraction, to reduce the flow rate due to the formation of a combined bookmark and to reduce the number of filling workings. w fe 00 ju 4d che so

Description

The proposed method is carried out as follows.

After the chamber reserves are removed, sealing bridges are installed in the workings of the delivery horizon, which are in communication with the filling space, and the chamber is filled with a hardening mixture to a height of 0.8 chamber widths. After grasping the tabs and acquiring the necessary strength from the development of the delivery horizon, which is located on the lying side of the reservoir, a set of blast holes is drilled so that the bypass gap is located across the strike. This is necessary so that the remaining part of the artificial ceiling does not collapse and supports the rocks of the hanging and lying sides. Wells are being charged and blown up. Through the gap formed, the rock moves under its own weight from the overlying chamber to the underlying chamber, filling the free volume with bulk material.

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Formulas of the invention A method for mining and laying steeply falling ore bodies of low and medium power, including excavating chambers, forming a hardened layer from the hardening bookmark in their lower part, drilling the hardened layer with holes, blasting them after excavating the underlying chambers and re-laying the worked out space with empty rocks characterized in that, in order to reduce the loss of minerals and increase the stability of the rocks of the side, the chambers of adjacent areas along the strike work out with a vertical offset whether relative to each other by blasting the wells drilled in the hardened layer, a bypass gap is formed across the strike of the ore body, and the worked-out space is re-laid by transferring waste rock from the overlying chambers to the underlying chambers through the bypass gap.

FIG. I

FIG. 2