SU723145A1 - Method of undergroung mining of ore bodies - Google Patents

Description

The invention relates to the mining industry and can be used with the development of steeply dipping deposits under a layer of water-flooded loose rocks. The known method of underground mining of ore deposits, a hall of hygienic rocks beneath the flooded stratum, includes opening, preparatory work and clearing the mineral during the chamber system of development 1. This method is characterized by large losses of mineral Bj, between chamber pillars. There is also known a method of developing ore bodies, which are predominantly steeply dipping, occurring under watered friable rocks, including the opening of the ore body, its preparation and clearing the ore from the top downwards with mass ore blasting and laying of the developed space 2. This method is characterized by the high cost of backfilling. The purpose of the invention is to reduce the cost of cleaning the excavation by eliminating backfilling from the design process. This is achieved by simultaneously with the opening and preparation of the ore body, over the latter, loose rocks in the contour of the zone of collapse of the upper part of the ore body are removed and as it is worked out, this zone is expanded by excavation of rocks towards the marginal zone of collapse. The drawing shows the ore deposit, the cross-section. The ore body 1, which lies beneath a series of flooded loose rocks 2, is opened by vertical trunks 3, from which the hauling storey quarters 4 and drifts 5 pass. First, watered loose poro 2 are removed in circuit 6 of the upper floor collapse zone and, as the cleaning works develop on the second floor, additional volume of loose rocks 2 is removed along contour 7. Thus, alternately From the bottom to the bottom of the ore body 1, the contour b of the side surface of the open cavity of the overflowing soft rocks is moved to the limit of the expected zone of collapse 8 from the lowest floor.

Root-breed space. his career 9 can be used to accommodate the rock heap

rocks, if nearby there is a mining quarry. Drainage in the area

loose rocks are provided by the construction of special drainage ditches from which water is either transferred through wells to underground workings or pumped out to the surface by pumping stations.

Underground development is done using the most efficient mass-collapse systems.

ORE ..

The proposed underground method of development is advisable to apply under the condition that the cost of removing loose sediments will be less

above or equal to the cost of laying the developed space.

In practical implementation, the expediency of consistent development of open and underground works is obvious, i.e. The annually removed volume of loose watered rocks should be minimal, but sufficient to reach the underground mine with a design capacity.

The proposed invention will allow more efficient and safe

to develop mineral deposits in the underground way.

Claims (2)

1. Zilberschmidt V.G. and others. Technologists of underground mining of potash ore. - M Nedra; 1977, p. 38-44. 2.Okanich I.F. and others. Substantiation of systems of underground mining of ore deposits, occurring under heavy flooded sediments. mi Mining Journal, 1977, 9, pp.46-49.