SU894203A1 - Mine drift protection method - Google Patents

Description

(54) METHOD OF PROTECTING SHTREK

one

The invention relates to the mining industry and can be used in a pillar-based system for the development of stratified mineral deposits.

There is a method of guarding the drift, which includes the construction, following the movement of lava in the worked-out space, of a rigid okoloshtrekovoy strip of hardening mixture 1.

However, the creation of a rigid near-trailing strip does not allow a drift to be used for a long time in difficult geological and geological conditions without additional labor costs.

The closest to the proposed technical essence and the achieved result is the method of protecting the drift reused in the pillar-based reservoir development system, which includes filling the entire cross-section of the drift with a backfill material, stopping the lining elements and creating a ventilation channel air flow, subsequent removal of backfill material and restoration of the liner 2.

However, when using a known method after removing the backfill material and restoring the drift, the overlying rocks will be held only with a support, which will cause its deformation and will require re-bonding of the drift. In addition, the creation of a vent in the pinch reduces the reliability of the vent and makes it difficult to remove the filling material when the roadway is restored.

The purpose of the invention is to increase the stability of the rocks of the roof and sides of the drift.

ten

This goal is achieved by the fact that simultaneously with filling the drift with a filling material, a rigid near-the-tract strip is erected from the building material into the incision to it from the side of the worked-out space.

In addition to TOP9, a ventilation channel is created in the near-stereo strip.

FIG. 1 shows the roiacTa development system; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows the node I in FIG. one;

The method of guarding the shield is carried out

20 as follows.

The drift 1 as the lava moves 2 immediately behind the jumper 3 lay

a full cross section, such as a pneumatic one, leaving a roof lining 4. In parallel with laying the roadway from the developed space, a perimeter-line strip 5 is erected from a quick-hardening material, which immediately after construction, turning into a monolith, begins to work, perceived the load from the overlying breed array. Such a band contributes to preserving the stability of the rocks of the vault and the sides of the mine, preventing the separation of the roof of the drift roof, and providing an effective line of breaking the rocks from the developed space and promoting the uniform distribution of loads on the drift roof both from the coal pillar 6 and from sides of the strip.

The backing array of the drift, having a bearing capacity, contributes to the positive effect of the strip, reinforcing the drift fence around the perimeter. In this case, the compaction of the filling material, and, consequently, its bearing capacity (reaction of resistance) increase mainly due to the stump of the soil generation.

The growth of the bearing capacity of the bookmark significantly limits the amount of soil heaving, contributing to the preservation of the useful section of generation. As a result, the equilibrium of the entire system is facilitated, and the equilibrium will be stable and will occur with a slight loss of output section. To restore the drift for reuse, the backfill material is removed with soil erosion, the drainage groove 7 is restored.

To ensure the supply of the spray jet and the lava 5 emanating from the lava, the lane 5 is doubled, leaving the ventilation duct 8 in the gap. The location of the ventilation duct between the two high-strength supports ensures its stability for the entire period of the drift operation.

With a large extent of the protected shield, the aerodynamic resistance of the channel may increase. In these cases, forced air supply through the channel can be used, for which

an inlet in the form of a window 9 on a drift in front of the bridge 3 is provided with an air supply device 10, for example, a local ventilation fan.

The use of the proposed method for the protection of the cross-section system under a pillar-based reservoir development system makes it possible to re-exploit production in particularly difficult geological and geological conditions and to obtain savings due to increased stability of the rocks of the protected production.

Claims (2)

1. The method of guarding the gateway, reuse with the pillar system of development the layers, including filling, following the movement of the lava, of the entire cross section of the drift with backfill material, leaving the lining elements and the creation of a ventilation channel to suck the outflow from the lava the air flow, the subsequent removal of the filling material and the restoration of the drift, characterized in that, in order to increase the stability of the rocks of the roof and sides of the drift, simultaneously with filling the drift with the filling material An obstinately traced strip of fast-hardening material is erected from the side of the worked-out area. 2. The method according to claim 1, is distinguished by the fact that the ventilation channel is created in the near-plate zone. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 687240, cl. E 21 D 19/02, 1977. 2. USSR Copyright Certificate No. 623970, cl. E 21 C 41/04, 1977 (prototype).