SU1004639A1 - Method of mining thick gently-sloping beds - Google Patents

Description

(54) METHOD FOR DEVELOPING POWERFUL SIZE LAYERS

one

The invention relates to the mining industry and is intended for use in the underground mining of ores, and can also be used in the extraction of non-metallic minerals.

A known method of development with a bookmark, 5 in which the upper part of the chamber is dredged with solid borehole with blast hole, a cutting slot is formed in the end of the chamber and the lower part of the chamber is worked out, beating the ore downward parallel Q wells, carrying out excavations and cleaning the excavation They are self-propelled and the chamber, after it has been worked out, is filled with a concrete bookmark 1.

The disadvantages of this method are significant losses and dilution of the ore scientific research institute, which are even greater with the change in soil hypsometry of the deposits and drilled wells.

The closest to the proposed technical essence and the achieved result is a method of working out thick flat beds, including carrying out preparatory workings for each layer, first working out the lower layer near the soil of the layer, subsequent working out the upper layer at the top of the layer at full capacity, finishing working out the middle layer and the flow in the developed space hardening mixture 2.

The disadvantages of this method are the increased losses and the dilution of the ore due to mining operations under the collapsed rocks.

The purpose of the invention is to reduce losses and dilution when mining ore layers.

Claims (2)

The goal is achieved by the fact that, according to the method of mining thick flat seams, including preparatory workings for each layer, the primary development of the lower layer near the soil of the reservoir, the subsequent development of the upper layer near the roof of the reservoir at full capacity, the final development of the middle layer and feeding the developed space mixtures, mining are carried out by chambers with the development workings in each chamber, and after mining the lower layer simultaneously with mining the upper layer the hardening mixture is fed into the developed space of the lower layer, and the middle layer is worked out after the mixture hardened, fed into the lower layer, from the surface of the latter. FIG. 1 shows the lower part of the chamber being worked out; in fig. 2 shows section A-A in FIG. one; in fig. 3 - laying the bottom of the chamber and the excavation of the layer under the roof of the chamber; in fig. 4 - tab of the upper part of the camera. The method of developing thick, flat seams of minerals is carried out as follows. From panel pits, transport 1 and ventilation 2, races 3 pass into the chamber, where the upper layer 4 of its lower part is worked out first, and then layer 5 along the deposits, the insulating bridges 6 are erected at the ends of the races and filled The lower part 7 of the chamber is laid out, and simultaneously with the laying the layer 8 is excavated under the roof, and the remaining middle layer, the ore bridge 9, is worked off from the hardened bookmark mass, then the insulating jumpers 6 are erected and the upper part 10 of the chamber is laid. Spool blasting when excavating alternating layers, mainly from the surface of the ore massifs and hardened bookmarks, eliminates ore losses and drastically reduces the dilution, makes it possible to selectively break and remove different ore and rock types, and the use of self-propelled equipment in the claimed method provides high labor productivity. The invention of the method of mining powerful flat layers, including preparatory workings for each layer, the primary development of the lower layer of the soil layer, the subsequent development of the upper layer at the roof of the reservoir at full capacity, completing the development of the middle layer and feeding into the developed space of a hardening mixture, characterized by that, in order to reduce losses and dilution during mining of ore formations, mining is carried out by chambers with preparatory workings to each chamber, moreover mining the lower layer simultaneously with working top layer curable mixture was fed into goaf bottom layer and the middle layer fulfill solidification after the mixture supplied to the lower layer, with the last surface. Sources of information taken into account in the examination 1. Baikonurov O. A. and others. Underground mining with bookmark, Alma-Ata, Nauka, Kazakh SSR, 1972, p. 357-359, fig. 169. 2. USSR author's certificate No. 711293, cl. E 21 C 41/04, 1978 (prototype). t . : -. ii:: (mg.Z