SU771347A1 - Method of filling-up excavated area at shield system of mining - Google Patents

Description

, (54) METHOD OF BOOKMARKING A WORKED SPACE

WHEN THE SHIELD SYSTEM OF DEVELOPMENT OF THE FIELD

MINERAL

one

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

There is a known method of laying the developed space in a shield system of development, which consists in preparing, delivering and supplying bulk material from the vent to the developed space formed during coal extraction and lowering of the shield overlap 1.,

The disadvantage of the known method is the weak bearing capacity of the filling array due to its repartition following the lowering of the panel overlap, heavy conditions for maintaining preparatory and rifled workings and a large amount of them.

The known method of laying the developed space in a shield system for the development of mineral deposits, which consists in feeding the filling material into the developed space as the shield cover is lowered from the ventilation to the backward horizon.

A concrete ceiling was erected at the ventilation drift, and from the side of the ventilation furnace a loose filling mass was reinforced by forcing cement mortar 2 into it.

The disadvantage of this method is low safety and productivity due to the weak bearing capacity of the backfill array, the complexity of the construction of concrete panel board slab and the need to strengthen the bead of the backfill array. With this method, it is necessary to leave the coal pillar between the removed coal pillars.

The aim of the invention is to improve the safety of work and productivity during the clearing recess.

15

This is achieved by the fact that support strips are erected in the developed space by layer-by-layer stacking of hardening backfill material, and after the shield is lowered to the haulage horizon, the remaining part of the exhausted space is filled with filling material, and hardening material supply

carried out on channels arranged in the previous layers.

FIG. 1 shows a tab layout (view in the plane of the formation); in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one; in fig. 4 is a structural diagram of the formwork, side view; in fig. 5 - formwork, top view; in fig. 6 is a structural diagram of an armature bar.

The method is carried out as follows.

After the coal strip has been removed across the bottom of the coal strip, the shield overlap 1 with the formwork 2 attached to it is lowered to the formed free storage space 3 via pipeline 4 and channels 5 (alternately) hardening mixture, which hardens and starts builds up the support strip 6. After lowering the panel overlap 1 to the haulage level, it is dismantled and the empty space is filled with loose filling material 7 to the full height immediately Ms. In this case, the lower part of the developed space can be completely filled with a hardening mixture.

The formwork 2 is a slab 8 with two parallel shields 9 reinforced with stiffening ribs 10. At the end of the slab 8, a channel-forming telescopic tube 11 with slopes 12 is installed perpendicularly to fix the tube more firmly and to obtain in the supporting strip 13 filling the hardening mixtures of the underfilling space 3. The plate 8 is equipped with hatches 14, and the channel-forming tube 11 has an opening 15 for controlling the filling of the space 3 with a hardening mixture (on the side of the plate 8 the tube has passage 16).

The process of erecting the support strip 6 using formwork 2 is carried out as follows.

The formwork 2 is attached to the shield slab 1 during its installation. Before serving the hardening mixture for formwork, its internal surface can be wetted with a solution that reduces the adhesion of the formwork to the hardened mixture. For this, hatches 14 are used. With the help of the same hatches, reinforcing rods 17 with shields 18 can be placed in the formwork by hooking hook 19 over ring 20 of the previously installed rod. This makes it possible to improve the conditions and increase the reliability of the formation of support bands.

Filling zapalubochnogo space is controlled by using the hole 15 in the channel-forming pipe 11.

This method of laying allows for more effective management of rock pressure in the shield system of development, eliminating the abandonment of coal pillars between removable pillars, reducing the amount of cutting work to a minimum, reducing the pressure on the panel fence and its breakage. All this allows to increase safety and productivity in the longwall.

Claims (2)

1. The method of laying the worked-out space at the shield system of mining of mineral deposits, which consists in supplying backfill material into the worked-out space as the switchboard is lowered from the ventilation to the recession horizon. , in the developed space, support strips were erected by layer-by-layer stacking of hardening backfill material, and after lowering the shield ceiling to The core is filled with the filling material of the remaining unfilled part of the goaf. 2. A method according to claim 1, characterized in that in the course of the construction of the support strips, channels are formed in their upper part, and the supply of hardening material is carried out through the channels formed in the previous layers. Sources of information taken into account in the examination 1.Marevich N.V., et al. On the effectiveness of a shield development system with a bookmark. Sat “Development of powerful coal seams. Novosibirsk, "Science, 1968, p. 51-61. 2. N.A. Chinakal. On the results of the use of the shield development system. Sat “Development of powerful coal seams. Novosibirsk, "Science, 1968, p. 3-12 (prototype). ///.//.//. / s  t. /.7.Щ 5 / / J P 15 (pae.Z J9 WITH 17 6