SU691578A1 - Method of filling a space after mining - Google Patents

Description

(54) METHOD FOR BOOKMARKING A WORKED SPACE

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

The known method of laying the mined-out space when mining steep coal seams along the strike consists in preparing, transporting backfill material and feeding it from the ventilation drift into the worked space beyond the fence being erected to the height of floor 1.

The disadvantage of this method is that it does not allow for high-performance coal extraction, since in this case the barrier with the support can move only after the mixture has hardened. The hardening mixture with this method can be supplied only with hard, eliminating the development of high hydrostatic pressure, which is associated with the high cost of delivering the filling mixture.

The known method of laying the developed space when mining steep coal seams along the strike consists in preparing, transporting backfill material through the pipes in the form of a cast hardening mixture, dividing it before feeding into the developed space for lump material and slime mixture, erecting rock bands from the lump material and the supply of vodooblazu mixture in the inter-band space 2.

The disadvantage of this method is low productivity and low transport distance of the stowing mixture through pipes due to increased pressure losses due to high viscosity and density of flow; from the components of the finished hardening bookmarks. :

The aim of the invention is to improve the performance of the backfilling operations by increasing the speed and distance of transportation of backfill materials.

Claims (2)

This is achieved by filling the inter-strip space following the construction of a strip of lumpy material, and adsorbing and binding substances are introduced in the form of an air mixture into the pipeline supplying the water-slurry mixture to the inter-strip space. The drawing shows the construction of the backfill array by the proposed method. The method is carried out as follows. On the surface of the earth, the slurry is prepared using known methods, adding fine and dust-like fractions to it, for example, ash, sludge and other industrial wastes, and bringing the slurry concentration to the maximum transportable. From the surface, the slurry is fed through slurry line 1 to a water separator-classifier 2, where the slurry is divided into lumpy material and water-slurry mixture. A piece of material is filled with a part of the open space between the lash 3 and the additional lightened lash 4. The water-slurry mixture through the sludge duct 5 is diverted into the rest of the stitched-out drilled space, the lower part of which is pre-lined with sacking 6. through the injector 8, in the slurry pipeline 5, adsorbing and binding substances, such as bentonite, calcium chloride, cement dust, etc., are supplied in the form of a creeping air mixture. Mixing with the water-slime mixture, they form a new, more viscous mixture, which, filling the developed space, carries out plugging of the pores in the enclosing walls, in the lower part separating the massif from the residual drift. Breed strip 9 is set in width at the rate of erecting it with some advance of the level of filling of the fluid mixture 10 and perception of the hydrostatic pressure of the column of fluid mixture. Solid particles of a fluid mixture can precipitate and improve the tamponing of the lower part of the goaf. The coal is excavated by a combine 11. The implementation of this method will improve the productivity of filling operations by transporting the inert aggregate in the form of a slurry at high speed; reduce the cost of preparing the backfill material by eliminating the dropout of small classes from the bulk material and the use of finished dust-like industrial waste; reduce the cost of hydrotransport of base mixes by reducing head losses. Claim Method A method for laying out a goaf when mining steep coal seams along a strike, which consists in preparing, transporting backfill material through pipes, dividing it before being fed into the open space to lumpy material and vodozhlamovuyu mixture, erection of protective rock bands from inter-band space, characterized in that, in order to improve the performance of backfilling operations by increasing the speed growth and distance of transportation, filling of the inter-lane space is carried out after the construction of a strip of lumpy material, and in the pipeline supplying the water-slurry mixture into the inter-lane space, adsorbing and binding substances are introduced in the form of an air mixture. Sources of information taken into account during the examination 1. V. Yerofeev. Technological schemes for the construction of a backfill array during the excavation of thick steep seams by mechanized complexes. Scientific Reports, No. 99, IHD them. A. A. Skochinsky, 1972, p. 9-17. 2. USSR Author's Certificate No. 2381420/03, cl. E 21 F 15/00, 1976 (prototype).