SU891924A1 - Method of open-cast mining of bed-type mineral deposits - Google Patents

Description

(54) METHOD OF OPEN DEVELOPMENT OF PLASTIC DEPOSITS OF MINERAL RESOURCES

I

The invention relates to the mining industry and can be used in the development of inclined seams of minerals and seams on the wing of the mold going under the pumps and to the surface.

There is a method of opencast mining of stratified mineral deposits, which includes controlled collapse of ledges of the stripping massif by undermining the ledges and dumping on the upper sites of the rocks of the overlying ledges and the subsequent excavation of the layer 1.

There is also known a method of open mining of reservoir deposits of minerals, including controlled landslide formation of the overburden massif by sequential re-excavation of the sliding rocks sliding along the glide plane by parallel penetrations along the front of the stripping operations by an excavator mounted on the dump, and excavation of the mineral Fossil by parallel penetrations along the front of the excavator. 2

However, both of these methods are characterized by insufficient efficiency in the development of inclined seams and seams.

on the wing of the trough going under the sediment and to the surface.

The purpose of the invention is to increase the efficiency of development of these reservoirs and intensify landslide formation. The goal is achieved by causing landslide formation of the overburden massif to the earth's surface along the top of the reservoir until the Cv is exposed at the upper boundary of the landslide, after which the reservoir is worked out by the front, opposite front of the overburden works, after the upper boundary of the landslide decreases.

The layer is soaked by creeping down, along the roof of the reservoir by holding trenches in a landslide at the upper boundary of the latter at the reservoir and feeding water into the trunk .5 of the neck.

That during the development of the reservoir expands the approach in the direction of the recumbent side of the reservoir.

The drawing is a mine management scheme.

The method is as follows.

20

Claims (2)

When developing the reservoir 1, the Excavator 2 is installed on the dump 3. By underworking, an oversized formation of the mass of 4 overburden rocks to the earth surface along the roof of the reservoir is caused. Array 4 is sequentially re-exported to the dump by parallel walks along the front of the stripping works, thereby causing further development of a landslide. As the landslide creeps toward the upper boundary, a stratum is exposed, which is worked out by parallel windings with the 5th front, the opposite front of the stripping works, followed by the lowering of the upper boundary of the landslide. In order to intensify the landslide process, a layer of sliding rocks is soaked along the roof of the reservoir by drawing trench 6 in the landslide at the upper boundary of the latter near the reservoir and supplying water to the trench. In the case of a low reservoir thickness, the mine penetration is extended in the direction of the recumbent side of the reservoir and rocks are located from the undercut in the developed space or in an adjacent area. In case of reservoir flattening, the overburden works are carried out according to a transport-free scheme with transshipment of overburden rocks into the worked-out area or adjacent areas. The length of the overburden front can be taken from the ratio of d. And 1 -, - L is the length of the front; A is the width of the entry; UE speed of the excavator; speed of creep of rocks. Claim 1. Method of opencast mining of stratal mineral deposits, including controlled landslide formation of overburden massif by means of continuous re-excavation into the dump of sliding rocks along the glide plane by parallel excavations along the overburden front, using an excavator installed on the dump, and a mineral resource that has been used to dig the slit on the plane of overburden; front mining operations, distinguished by the fact that, in order to increase the efficiency of development of inclined seams and layers on Near the trough under the sediments and to the surface, cause the landslide formation of the overburden rock to the earth's surface along the top of the reservoir until the latter is exposed at the upper boundary of the landslide, after which the stratum is worked out by the front, the opposite front of the overburden works, followed by a decrease in the upper boundary of the landslide. 2. The method according to claim 1, wherein that, in order to intensify the landslide formation, a layer of sliding rocks is soaked along the roof of the reservoir by holding a trench in the landslide at the upper boundary of the latter near the reservoir and feeding water into the trench. 3. The method according to claim 1, characterized in that during the development of the formation, the approach to the recumbent side of the formation is expanded. Sources of information taken into account in the examination 1. The author's certificate of the USSR No. 630418, class E 21 C 41/02, 1977. 2. USSR author's certificate number 420780, cl. E 21 C 41/02, 1970.