SU1373819A1 - Method of mining mineral deposits - Google Patents

Description

(21) 4132704 / 22-03

(22) 07.28.86

(46) 02.15.88. № 6

(71) All-Union Scientific Research Mining and Metallurgical Institute of Non-Ferrous Metals

(72) V.V.Mikhailov, V.G.Ort, G.V.Sokolov, M.E. Nurumov, L.V.P. Tigorsky, V.F.Scherbinin and B.V. Chumakov

(53) 622.273 (088.8)

(56) New technologies and economics of underground mining. Sat works MMM USSR. Research Institute for Problems of KMa im.L.DSChekov, vol. 16, 1971, pp.65-69.

USSR Author's Certificate No. 863863, cl. E 21 C 41/06, 1979.

(54) METHOD FOR DEVELOPING DEPOSITS OF MINERAL RESOURCES

(57) The invention relates to the mining industry. The purpose of the invention is to increase the safety of work by unloading an array of minerals. Within the block (excavation site), preparatory and rifled excavations (B) and an inclined exit are made, from which they begin to the lower mineral layer over the entire area of the block with the formation of ore columnar pillars. The cross section of the latter is equal to the cross section of future artificial supports. The above-cage space of this layer is filled with a hardening mixture. After the hardening mixture has reached the required strength, preparatory layers are passed under this layer. Of these, the undercut B cuts the ore column pillars left behind. Then, vrz wells are drilled in the wort V. As a result of their blasting, chambers for artificial supports form. Columnar pillars and mineral resources are drilled to the full height of the block. After registration of the chambers for artificial supports and the construction of the latter, layered extraction of mineral reserves between artificial supports is carried out.

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The invention relates to the mining industry and can be used in the underground mining of mineral deposits with the laying of the goaf.

The purpose of the invention is to enhance. safety of works by unloading an array of minerals.

The method is carried out as follows.

Within the block (excavation site), preparatory and rifted haulage and ventilation workings, as well as an inclined exit from which the ore is excavated in the lower layer of the ore (combination of pliability layer), pass. The combined pliability layer is formed by mining the ore over the entire block area with the formation of ore columnar pillars in places of future artificial supports and filled with the developed space of this layer with hardening mixture (with pre-installation of reinforcement, if necessary). The dimensions of the cross section of ore columnar pillars in the compliance layer are assumed to be equal to the cross section of the chambers for artificial supports. Before laying the mined-out space, columnar ore delicacies are wrapped with metal mesh, synthetic film, or coated with special coatings, such as lime. This allows you to prevent or reduce the detachment of the hardening mixture in the formation of chambers under artificial supports. In order to ensure the completeness of the filling of the aforesaid space with a hardening mixture, a slope of 3-5 ° is applied to the combined layer of ductility.

After the hardening mixture has reached the required strength, loading and delivery of the supporting layer is carried out under the layer of compliance, from which the ore columnar pillars are cut by the undercut workings, and then the boreholes are drilled from them and as a result of their blasting, chambers for artificial supports are formed. At the same time, columnar ore pillars are drilled in the combined layer of compliance and the ore massif to the full height of the block (excavation site). The formation of chambers under artificial supports can be carried out by known methods,

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for example, sectional blasting of wells, drilling for a full section. After blasting and release of ore from the formed chambers under artificial supports to interface the slash production with the loading and delivery development, insulating bridges are installed and chambers under the artificial supports are hardened with a mixture up to the filling soil. Development of chambers for artificial supports and filling them with hardening mixture are alternately from the center to the flanks along the length and width of the block (excavation area). The systematic cutting and mining of columnar ore pillars in the combined pliability layer cause unloading of the ore massif in the zone of management of cleaning operations and the redistribution of the reference pressure to the ore massif not disturbed by the mine workings, since the combined pliability layer has a high deformation capacity. As a result, work safety is achieved in the process of making the chambers under artificial supports.

After decorating the chambers for artificial supports and erecting artificial supports, layered mining of mineral reserves between artificial supports is carried out. Depending on the specific conditions in the block (excavation section), several layers are simultaneously worked upwards or downwards.

In all technological processes of mining, both portable and self-propelled equipment can be used.

Claims (1)

Invention Formula A method of developing mineral deposits, including preparatory and rifled cutting, excavation of minerals in blocks, erection of artificial supports for the entire height of the block before excavation of the main reserves of the block, mining of mineral resources in the block with hardening mixture and strengthening of artificial supports as each layer is worked out, characterized in that, in order to increase the safety of 313738194 work, by unloading a mass of oil beneath it, preparatory minerals are passed, at first, the mine workings, from which the lower layer of the useful mineral is cut, with ore columnar pillars of the entire block area from the forge, and then from the subsurface block - the world of ore columnar pillars is formed by chambers under artificially - with a cross section equal to the transverse supports by excavating the columnar pillars to the river section of artificial pillars, and the mineral above them after filling with hardening smes-full height of the block. Suw the goaf of this