SU1585519A1 - Method of creating a zone of gentle sloping of roof - Google Patents

Abstract

This invention relates to the underground mining of stratal mineral deposits. The goal is to increase the safety of work and eliminate deformations of buildings and structures in the undermined area by maintaining the integrity of the thickness of the minerals covering the minerals during the development of closely spaced layers. Preparatory and rifled workings pass through and work out the excavation area with the formation of compliant pillars. Mineral excavation is carried out with chambers with constant dimensions of chambers and chamber pillars. At the same time, the zone of smooth lowering of the roof is formed from two steps. The first stage is formed in the underlying rocks ahead of the front of the cleaning works by the formation of compliant inter-chamber rock pillars. The second stage is created by partial laying of the rock of the chambers of the underlying reservoir of the mineral at the boundary of the developed space and chambers in the underlying rocks. 2 Il.

Description

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

The purpose of the invention is to increase the safety of work and eliminate deformation of buildings and structures in the undermined area by maintaining the integrity of the thickness of the rock covering the mineral during the development of contiguous layers.

FIG. Figure 1 shows the formation of a zone of smooth lowering of the roof with the help of compliant pillars located in the underlying rocks in front of the cleaning front; in fig. 2 - the same, with the help of malleable pillars located on industrial layers of the mineral.

The method is carried out as follows.

Two contiguous sylvinite layers 1 and 2 are worked out using a chamber development system. The preparation is carried out by conducting preparatory and rifled workings. Layer 1 is processed by the PK-8 combines with the following industrial parameters: the width and height of chamber 3 is 3.2 m, the width of the compliant chamber tube is 4 to 5.8 m. Layer 2 is processed by the Ural-20KS combines with the following industrial parameters 00

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mi: the width of chamber 5 is equal to 6, 1 m; chamber height 5 - 3.7 m, inter-chamber flexible pillar width 6-2.9 m.

Near a constant boundary 7 of the open space with an interdisciplinary circuit to reduce the deformation of the layers of the water barrier and eliminate the risk of loss of waterproofing properties, they create a zone of gradual lowering of the roof, which consists of two steps with a width of 160-200 m.

Compliant pedigree inter-chamber pillars 8 of the first stage of the zone of smooth lowering of the roof are formed in the underlying underlying rocks by sinking chambers 9 in front of the cleaning works front. The second stage of the zone of smooth lowering of the roof is formed by partially filling the developed space of the chambers 5 on the formation 2 with rock 10 and chambers 9 in the underlying rocks. At the same time, the extraction of the mineral up to the border 7 is carried out with constant industrial parameters of the chambers and pillars.

Formula and impacted Method of creating a zone of a smooth lowering of the roof, including carrying out preparatory and rifled workings, working out the excavation section with the formation of pliable pillars and mining minerals with chambers with a constant size of the developed chamber space and interchamber pillars, characterized in that ) improving the safety of work and eliminating deformations of buildings and structures in the undermined area by maintaining the integrity of the thickness of the rock covering the minerals during depletion The operation of the contiguous layers, the zone of smooth lowering of the roof is formed from two stages, the first of which is formed in the underlying rocks ahead of the cleaning works front by the formation of compliant inter-chamber rock pillars, and the second stage is created by partially laying the rock of the underlying layer of minerals on the border of the developed space and chambers underlying rocks.

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Claims (1)

Claim A method of creating a zone of smooth lowering of the roof, including carrying out preparatory and rifted workings, working out a excavation section with the formation of malleable pillars and excavating minerals with cameras with constant dimensions of the worked out space of the chambers and interchamber pillars, characterized in that, in order to increase the safety of work and eliminate deformation of buildings and structures on the part of the mine by maintaining the continuity of the thickness of the rocks covering the minerals in the development of adjacent formations, the zone of smooth lowering of the roof is formed of two stages, the first of which is formed in the underlying rocks in front of the front of the treatment plant by forming compliant interchamber pillars, and the second stage is created by partially laying the chambers of the underlying mineral layer at the boundary of the mined space and chambers in the underlying rocks.