SU883521A1 - Method of erecting filling-in strips while mining sloping mineral beds - Google Patents

Description

(54) METHOD FOR ESTABLISHING FILLED STRIPES IN THE DEVELOPMENT OF STEEP LAYERS

USEFUL

The invention relates to the mining industry and can be used — but when developing steep layers of minerals with the laying of the worked out space.

There is a method of erecting a filling array, including transporting the filling mortar through the pipeline and feeding it into the worked-out space through the transport filling ₍ pre-created in the roof of the laying excavation £ 1].

The disadvantages of this method are the possibility of erecting a filling array only in the direction from _(the end of the pipeline (the beginning of the transport gap) to the opposite end of the excavation (chamber) with a filling grout with high mobility and horizontal roofing. , especially with quick hardening filling mortar due to possible hardening -

FOSSIL of the solution in the transport gap, and also due to the fact that the filling mortar during pressure transport along the gap will tend to flow below the gap, where the resistance to the flow of the solution is less than in the gap surrounded by three fixed walls.

A known method of forming an artificial roof in the development of powerful coal dipping beds. A powerful coal seam is worked out in inclined layers in a descending order with the roof being completely collapsed. When mining the overlying layer from the treatment space of the bottom face in the soil, slits are cut parallel to the bottom line, into which perforated pipes are laid before the passage of the powered roof support. After the passage of the mechanized roof support and the collapse of the roof into the collapsed rocks, the hardening mixture is injected through the indicated perforated pipes from the preparatory workings that outline the excavation columns [2D.

The disadvantage of this method is that it cannot be used when mining steep coal seams of thin and medium capacities.

There is also a method of erecting filling strips in the development of steep, strata of minerals with long posts along the strike, which consists in preliminary creating a transport chute in the worked out space parallel to the working face along the entire length of the erected filling strip and supplying a hardening mixture from the ventilation drift along the transport chute for the formwork moved from bottom to top along the face, leaving behind the formwork harden-. the main filling strip, while the trans-, tailor gutter is created in the filling strip from the side of the working face for the construction of the next filling strip directly adjacent to the previous [3J.

The disadvantage of this method is that they cannot erect separate filling strips at different distances from each other, and the construction of filling strips nearby requires a large consumption of binder and, in addition, it is impossible to use rigid filling mixtures to obtain a satisfactory transport trough.

At the same time, the supply of a rigid hardening mixture for a mobile formwork reduces the requirements for sealing the formwork walls, eliminates possible leakage of the solution from the formwork and, thus, increases the reliability of the filling strip and expands the scope of this method.

Nel inventions - the construction of ο · ρ separate filling strips of hard hardening mixtures located at any distance from each other.

This is achieved by the fact that a gap is used as a transport chute, which is created in the soil of the formation, and the formwork during the construction of the filling strip is mixed over the gap.

In this case, the shell in the soil of the formation is created simultaneously with the descent of the combine or formwork;

In addition, the cross-section of the slit is made in the form of a triangle with the formation of an acute angle at the base of the • transport trough, while

883521.

Well, the triangle on the side of the working face is placed vertically.

The drawing shows a diagram for the implementation of the proposed method.

$ The transport chute (groove) 1 is cut simultaneously with the descent of the combine 2 or formwork 3. After cutting the grooves in the soil at the site of the future / backfill strip at the bottom of the la—. »0 you place formwork 3 above groove 1.

Then, a hardening mixture is prepared on the ventilation drift 4, preferably a rigid one, and it is fed via pipe15 to wire 5 (conveyor) through funnel 6 to groove 1, by which the prepared filling mixture flows by gravity onto the formwork 3. As the formwork is filled with the mixture, it is lifted upward using a rope 7 attached at the other end to a winch located on the ventilation drift, a hardened backfill strip 8 is formed behind the formwork. When the formwork approaches the 25 ventilation rod 4, the mixture is discontinued with this calculation m, so that it is possible to remove the formwork from the hardened strip without putting it on drift 4. However, if necessary, the construction of strips can also be carried out with the output of the formwork on the drift.

After the construction of the filling strip, they begin to break off the coal combine. Mr. and further cycle repeats. The space between lanes 8 can be filled with • cheap bulk material.

The proposed method of erecting filling strips allows, using the trough to transport the mixture over the worked out space, to erect separate filling strips at different distances from each other, and this, in turn, allows to save the binder - the most expensive component of the filling material. In addition, it becomes possible to use rigid hardening mixtures for feeding for formwork, and this simplifies the design of the formwork (no careful ₅₀ sealing of the walls of the formwork between the soil and the roof of the formation is required), reduces the cost of an expensive binder. In general, the scope of the method is expanding.

Claims (3)

3. workings, outlining the extraction columns G2D. The disadvantage of this method is that it cannot be used when mining steep coal seams of thin and medium thickness. There is also known a method of erection of backfill strips in the development of steep, mineral layers with long pillars along strike, which consists in pre-creating a transport chute in the developed space parallel to the clearing face along the entire length of the built-in filling strip and supplying hardening mixture with a ventilation drift along the transport chute behind the formwork, moved upwards along the clearing flank, leaving a solid backfill strip behind the formwork, while the transport chute creates stowing band from the stope for erecting subsequent stowing of the strip directly to the previous primpsayuschey 3J. The disadvantage of this method is that it cannot build separate stowing strips at different distances from each other, and the construction of stowing strips in a row requires a large consumption of fuel and, moreover, it is impossible to use rigid stowing mixtures to obtain a satisfactory transport chute. At the same time, supplying a rigid hardening mixture for transferring the formwork reduces sealing requirements for the formwork walls, eliminates possible leakage of mortar from the formwork and, thus, increases the reliability of the construction of the filling strip and expands the scope of application of this method. The purpose of the invention is the construction of individual backfill strips of hard hardening mixtures located at any distance from each other. This is achieved by using the bridge that is created in the soil of the reservoir as a transport chute, and the formwork during the construction of the backfill strip is moved above the slit. In this case, a gap in the soil of the reservoir is created simultaneously with the descent of the combine or formwork; In addition, the cross-section of the slit is extruded, -i in the form of a triangle with the formation of an acute angle at the base of the transport chute, while the side of the triangle on the side of the clearing hole is arranged vertically. The drawing shows a scheme for implementing the proposed method. The transport chute (groove) 1 is cut simultaneously with the descent of combine 2 or formwork 3. After cutting the groove in the soil at the site of the future filling strip in the lower part of the lava, formwork 3 is installed above the groove 1. Then a hardening mixture, preferably hard, is prepared on the vent 4. and it is fed through conduit 5 (conveyor) through funnel b into chute 1, through which the filling mixture is prepared by gravity to formwork 3. As the mixture is filled with formwork, it is lifted up using a rope 7 attached with the other end to the winch, located on the ventilation drift, a solidified backfill band 8 is formed behind the formwork. When the formwork approaches under the ventilation 10 UNI track 4, the mixture is stopped into it in such a way that it is possible to remove the formwork from the hardened strip without entering the drift 4. However if necessary, the construction of strips can be made with the formwork on the drift. After the erection of the backfill strip, the coal combines start to break down. and then the cycle repeats. The space between the strips 8 can be filled with cheap bulk material. The proposed method for the construction of backfill lanes allows, using the chute to transport the mixture through the developed space, to erect separate backfill strips at different distances from each other, and this, in turn, allows to save real time, the most expensive component of the backfill material. In addition, it becomes possible to use hard-hardening mixtures for supplying formwork, and this simplifies the formwork design (no careful sealing of the formwork walls between the soil and the roof of the formation is required) and reduces the cost of an expensive one. In general, the field of application of the method is expanded. Claims 1. Method of construction of backfill strips in the development of steep seams minerals with long pillars by wiping, implying in the pre-production of a transport chute in the developed space naplable to a cleansing face along the entire length of the erected stowage strip and supplying the hardening mixture from the ventilation drift along the transport chute behind the formwork, moving upwards from the bottom of the flow, formwork of hardened backfill strip, characterized in that, for the purpose of erecting separate backfill strips of hard, top-up mixtures located on any Om distance from each other, as a transport chute use a gap that is created in the soil of the reservoir, and the formwork during the construction of the filling strip is moved over the gap, 2, the method according to claim 1, characterized in that a shell in the soil of the formation is created simultaneously with the descent of the combine. 3. The method according to p. 1, about t h l a n u and in order that the gap in the soil of the reservoir create simultaneously with the descent of the formwork.  4. A method according to claim 1-3, characterized in that the cross section of the slit is made in the form of a triangle with the formation of an acute angle at the base of the transport chute, while the side of the triangle on the side of the clearing site is arranged vertically. Sources of information taken into account in the examination 1. USSR author's certificate number 376584, cl. E 21 F 15 / СЮ, 1971. 2. USSR author's certificate on application No. 171OO87 / 22-OZ, CL.E 21 C 41 / O4, 1971. 3. USSR author's certificate on application Ns 2530145 / 22-03, cl. E 21 F 15 / OO, 1977 (prototype),