SU1765432A1 - Working support method - Google Patents

Abstract

The invention relates to mining and m. used to support workings (B). The goal is to increase the efficiency of maintaining B by reducing the soil stump. Along B, under the frames of the permanent support (K), a K reinforcement consisting of paired supporting elements is installed. Before placing the elements between their base and soil B, a common damping gasket is placed. As lava moves, K gains are transferred from the zone of rock-pressure stabilization to the zone of junction B with lava. Placing K reinforcement on a common damping base allows the mountain pressure to be evenly redistributed to the soil B. 4 sludge.

Description

The invention relates to the mining industry, and in particular to methods of maintaining, preferably conveyor, ventilation mine workings of operating lavas.

There is a method of maintaining mine workings, which includes sequential placement of permanent arched reinforcement along the excavation under the frames, consisting of supporting elements mounted on the same base at different angles of inclination to the horizon, while one of the supporting elements is set vertically and the deviation of the other from the vertical carried out in the direction of the worked-out space with an increase in the angle of inclination along the working from the clearing slab to the stabilization zone of displacement of rocks as they collapse rocks.

The disadvantage of this method is the possibility of increasing stress concentrations on the soil of generation, and this will adversely affect ongoing measures to reduce the heel

soil in the formulation. In addition, the use of reinforcement of paired support elements, one of which is set at an angle to the horizontal and the other vertically, eliminates the possibility of installing reinforcement in front of the clearing face,

This is due to the fact that in the section of the excavation up to the zone of the reference pressure there are no collapsed rocks that need to be compacted due to the rotation of the support element installed inclined to the horizontal plane.

There is a known method for maintaining a mine working, which includes the sequential placement along the excavation under the frames of the permanent lining of reinforcement; consisting of paired supporting elements, carrying out a constant support, before the reinforcement enters the stabilization zone of the rock pressure, where they reinforce the reinforcement for subsequent transfer and install it until the reference pressure zone of the clearing face is reached paired support eleso

with

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The cops are removed and after the lava passes to maintain generation in the zone of intensive displacement of the collapsed roof rocks, paired support elements are again installed, and in both cases the paired support elements of the reinforcement are located on opposite sides of the slot, which are cut in the soil of the mine before the reference pressure zone .

The disadvantage of the known method, as in the first case, is the creation of conditions for the concentration of stresses in the soil under the individual heels of the supporting elements, and this causes premature destruction of the soil in development, especially if a slot is cut in it. In addition, the presence of a gap in the soil of the mine creates a difficulty in the operation of the support mating, since it is rather difficult to keep the axis of symmetry of the gap in the direction of the axis of symmetry of the support mate under production conditions. Otherwise, when one of the support frames will be located in the gap area, additional work will be required to create support surfaces in the soil of the excavation, along which the support support could move.

The purpose of the invention is to increase the efficiency of sustaining production by reducing the soil heap.

This is achieved by the fact that in the method of maintaining mine workings, including the installation along the workings under the frames of permanent lining reinforcement, consisting of paired supporting elements, they spread between the working soil and the top permanent lining with subsequent transfer and installation of reinforcement lining from the beginning The boundaries of the zone of stabilization of the rock pressure in the zone of interface of the mine with the lava, before the thrust support of the reinforcement, its paired supporting elements are mounted on a common damping gasket.

FIG. 1 is a diagram of the support of a mine working, a plan view; FIG. 2 is a section A-A in FIG. one; in FIG. 3, the same as in FIG. 1, a separate section of generation in an enlarged form behind the support of the mating; Fig. 4 is a graph of the displacements of the soil and roof: A, B — in areas of production with the proposed reinforcement, reinforcements; B, D — with known lining.

The method is carried out as follows.

As the clearing blade 1 moves in the transport excavation 2 under the frames of the permanent arch support 3,

reinforcement support consisting of supporting elements 4.5. Each supporting element 4.5 has an upper support 6.7 and a base in the form of a common damping strip 8. As the material of the damping strip 8, any elastically malleable material can be used (for example, wood, rubber in combination with metal, wood, reinforced concrete blocks etc.).

The reinforcement support is installed behind the interface support 9 and is retained in the zone of active displacement of lateral rocks until the stabilization zone 10 begins. In the section 11 of the interface of the lava with generation 2, the support support 9 performs the role of reinforcement support. In the stabilization zone 10, the support reinforcement is dismantled and transferred to the next production site 2 for support mating 9.

By placing the support elements 4.5 on the common damping gasket 8, the issue of uniform redistribution of the forces of rock pressure on the working soil within the length of the damping base is solved. In addition, the damping gasket 8 serves as a shock absorber. Indeed, in the case of a hard-to-tear main roof, the reinforcement lining serves as a trim support.

Therefore, when the hanging roof consoles collapse, the impacts on the lining 3 are absorbed by the damping gasket 8.

Observations of lateral rocks displacements at work sites with the proposed and known reinforcement braces (Fig. 4) showed that the lifting of soil rocks A compared to the previous method B was reduced by 25-28%, the lowering of roof rocks decreased by 37- 40%.

Claims (1)

Claim Method A method of maintaining a mine working, including installation along a frame under a frame of permanent support, reinforcement, consisting of paired supporting elements, between the working soil and permanent support roofs, followed by transfer and installation of support reinforcement from the beginning of the stabilization zone of the mountain pressure in the interface of generation with lava, characterized in that, in order to increase the efficiency of maintaining production by reducing the heave of the soil rocks, before thrusting it strengthens its doubles ornye elements mounted on a common damping strip. DDODOSOOQ fe P L Y / 1 7 L 3 d - I 1 f - - 1 T P rtnnnn riAr / P P NP  II Ill HlhHITIH-lrilH H lillllflM DOSOOQ fe 1 7 L 3 d g f - V f - I 1 f - - 1 T - - TII t J P rtnnnn riAr / P P NP NP AP  II Ill HlhHITIH-lril H H lillllflMI rS n r Zone offset stabilization Area of active lateral displacements Characteristic zones of occurrence of rock pressure Figure 1 DD . jk -1G A Zone reference pressure AT L. L. L. L. L. L. L. Editor Z. Khodakova FIG. four Compiled by L. Berezkina Tehred M.MorgentalKorrektor N.Gunko FIG. 3