SU1606696A1 - Method of producing underground voids - Google Patents

Abstract

The invention relates to the development of minerals (PI) with the formation of underground voids (PP). The goal is to expand the field of application of the method due to its use in the development of deposits of PI in unstable rocks at different angles of incidence of deposits. Pass t preparatory development. The excavation of the massif around the perimeter of the projected PP is carried out. At the same time, a carrier wall (HC) is first created - overlapping of the longitudinal beams with a recess of PI bores along the strike of the field, laying of reinforcement in them and filling with a hardening mixture. Then, NSs are created along the hanging and lying sides of the deposit by working the PI downwardly in layers, and also creating the NS between the fittings of what and the lying sides by working off the layered approaches across the strike. With the formation of NA in the central part form the rear sight. After the construction of the NS and the hardening of the mixture of the design strength, the formation of PP by the recess of the pillar under the protection of the HC by sublevel blasting is performed by slowing down the blasting. 3 il.

Description

The new field ore carrying out-Z Ö Bearing plate consists of reinforced concrete beams 6, supported on transverse reinforced concrete walls-diaphragms 7 .. which take the load from the overlying rocks through the plate and the load from the lateral pressure through the reinforced concrete walls from the side of the hanging side 8 and the lying side 9 Cameras 10, bounded by a carrier plate, transverse walls-diaphragms and side walls, are underground voids and can be used for various national purposes.

The method is carried out as follows.

The preparation consists in carrying out the field haulage and ventilation drifts 1 and the loopback slope 2. The sublevel drifts pass from the transport slope to each sub-floor.3, and out of them and from the haulage road to each chamber are carried out 4, In the center unit, the block field ore-locus occurs. 5 o Preparatory workflows (except for ore-release) are retained for normal operation of subsurface voids. The excavation of the rock mass is carried out along the perimeter of the projected void. The load-bearing walls are formed in the worked-out space. The upper layer of the block is removed with steps 6 along the strike of the ore body. After a complete rework, the fittings are installed in it, the fittings are installed, and the filling is filled with a hardening mixture, i.e., reinforced concrete beams are created, with which the whole is covered. surface area Then, the ore in the transverse walls-diaphragms 7, as well as in the walls on the side of the hanging side and the lying 9 sides, is mined under the reinforced concrete slab with descending horizontal layers and respectively along the strike and along the deposit, which also create reinforced concrete beams.

yu 15

6696 4

Claims (1)

Pillars - the future voids 10, bounded above by a reinforced concrete slab, and from the sides by reinforced concrete walls, are worked into the second stage by sublevel or floored blasting. In order to reduce the seismic effect of drilling and blasting, the wells and boreholes are not drilled to the walls, the blasting is carried out in a micro-slow manner. After working off the pillars, the underground void is used for various purposes. Claims. yu 15 about 45 five 0 The method of formation of underground voids, including the carrying out of preparatory workings, excavation of a mountain massif around the perimeter of the underground emptiness, formation of bearing walls by installation in the resulting developed space of reinforcement and filling it with a hardening mixture forming the pillar in the central part and the formation of an underground void excavating the pillar after erecting the bearing walls and achieving a design strength of the hardening mixture, which is different from the fact that, in order to expand the field of application of the method by using it When developing mineral deposits in unstable rocks at different angles of incidence of deposits, they initially create a bearing wall — overlapping from longitudinal beams by excavating mineral deposits with strips along the strike of the deposit, then bearing walls create along the side and lateral sides of the deposit with mineral mining with descending mineral strips and also bearing walls create between the fittings of the suspension and the lying sides by working the layered approaches across the direction of the deposit, after which stvl dissolved subterranean formation recess pillar protected by the bearing walls sublevel breaking short-delay firing. five S    4 hh v x 4 FIG. 2 1 //// //// //// //////////// //// //// //// )// //// //BUT /// / //// //// //// //// //// //// //// //// // // // // Fig.Z