SU725758A1 - Method of settable filling-in of excavated area - Google Patents

Description

interband and the solution is fed into the interband space left not filled in the previous cycle.

The drawing shows the technological scheme of hardening bookmarks during the development of a steep layer of lava along the strike with a mechanized excavation.

The bookmark is as follows.

Through the slurry line 1 lita, the mixture is fed to classifier 2, for example, a vibrating screen, where it is separated. A coarse aggregate, in the form of a lumpy bulk mass with a small amount of mortar that envelops individual pieces of the aggregate, is guided over the fences 3, forming the bottom hole safety strip 4 and interband prostrate 5, and the separated solution, which is in the form of milling with fine aggregate, along an inclined tray 6 is directed to inter-band space 5 left from the previous bookmark cycle. The excavation is carried out, for example, by a combine, and the transfer of mineral resources is carried out by a conveyor. At the beginning of the cutting of the uncut column, the power of the WATER safety line will not be separated without separation of the mixture by hard or cast stepwise as each part of the strip hardens. The starting strip can also be made from dry or dehydrated bookmarks. Safety strip 4 erected from lumpy material j: izfilled pores, is an array that does not develop hydrostatic pressure, this array of pieces moistened with a solution is capable of absorbing IcycKoB with a residual solution. Therefore, when applying the solution to the safety strip, the latter serves as a reinforced jumper. A part of the solution flows into the pores of the rock strip and strengthens it, forming a strengthened massif, which allows working minerals of lava along the strike for the entire height of the floor. The fences of protective rock bands for their construction are fully mechanized. For this, mechanized formwork can be applied from the side of the bottom, and from the side of the inter-lane space 5, the barrier can be made in the form of inflatable cylinders, which are lowered into the worked-out space and inflated, during the construction of the strip and its solidification, after

which they are taken out on the vent for use in the next bookmark cycle.

The proposed method allows the use of

the simplest and most simple method of hardening bookmarks with the transportation of cast mixtures through pipes under natural pressure to the slab with the most progressive system of development of long columns along the strike,

Claims (2)

providing high load on the face with a minimum number of preparatory workings; dramatically reduce the pressure of the backfill array on the frame, which will allow the use of mechanized mobile formwork - fencing; reduce the adhesion strength of the hardening bookmark to the enclosing surface by creating a protective strip of bulk material with point contacts with the enclosure. Claims The method of hardening laying of the open space when mining large coal seams along the strike consists in preparing, transporting backfill material and feeding it from the ventilation drift into the developed space for the fence being built to the entire height of the floor, characterized in that the performance of cleaning works and reducing the cost of filling works; the filling material is divided, for example, by classifier on the lump material and the solution, a bottom-hole protective rock strip is erected from the lump material and remains between it and the previously erected safety rock strip of an empty interband band, and the solution is fed into the inter-band space left unfilled in the previous cycle. Sources of information taken into account in the examination 1. Baikonurov O. A. and others. Underground mining with bookmark. Alma-Ata, Science, 1971, p. 235-236. . 2. Erofeev V.F. Technological schemes for the construction of a backfill array with the excavation of powerful steep seams by mechanized complexes. Scientific Reports, No. 99, IHD them. A. A. Skochinsky, M., 1972, p. 9-17 (prototype).