The method for reservoir protection mining

 

(57) Abstract:

The invention relates to mining and can be used to provide maintenance-free maintenance of the reservoir openings in the practical application of the model of training schemes mine fields due to the rational management of stresses and strains in the host production rocks. The main objective of the invention is to improve the stability and ensuring the non-maintaining reservoir excavations during the entire service life with maximum leaving the rocks in the mine. The method for reservoir protection mining involves performing one or more parallel excavations, the excavation of the reservoir wide face, breaking the wall rock with placing them in mined-out space of the reservoir in the form of rock band and the flow in the boundary part of a rock band, adjacent to the wall framing, fastening solution. Binding solution may be filed in a rock band at a distance from the walls of the excavation is not less than the distance to the maximum bearing pressure. If two or more parallel openings between the hardened solder parts rock band you can leave the non-reinforced part is/P> The invention relates to mining and can be used to provide maintenance-free maintenance of the reservoir openings in the practical application of the model of training schemes mine fields due to the rational management of stresses and strains in the host developing the rocks.

There is a method of protection of excavations (see, for example, C. N. Reva, O. I. Melnikov, C. C. Paradise. Maintenance of mine workings. - M.: Nedra, 1995, S. 258), in which the formulation is placed in the zone of inelastic deformation formed by first conducting a parallel compensation output. However, this method requires separation between the workings of the pillar, the size of which would rule out their influence. Moreover, the dimensions of the pillar increases with increasing depth of work that leads to large losses of minerals (coal), to reduce the influence of the compensation output deformability circuit protected output.

There is a method of holding and protection of parallel reservoir transport and ventilation drifts wide stroke (see, for example, Lama, R. D., Marshall P. "improving the ROP development workings in coal mines Australia" glückauf odoi lava with erection between parallel drifts in the developed space pliable strips of mortars, prepared on the surface and supplied by TrueTransparency to the place of erection of the strip. This method is characterized by high costs and labor costs, and can be used for seam thickness, does not require Podravka roof rock or soil layer to increase the sectional area of workings.

Closest to the proposed technical essence is a way of protection reservoir excavations (see E. I. Nekrasov, I. N. Grishko, B. S. Church and other "Holding drifts wide bottom on shallow seams". - M.: Nedra, 1969, S. 9-17), which consists in holding one or more parallel reservoir openings with a separate recess formation and breaking of roof rocks and soil and the placement of the smitten rock in the mined-out space of the reservoir in the form of a rock band. However, when implementing this method, the security of a rock band because of its low compressive properties shrinks to 50% of the power take out of the reservoir, which causes significant displacement of the rocks on the path of development followed by loss of its operational status.

The main objective of the invention is to improve the stability and ensuring the non-maintaining reservoir excavations in the course of conducting the blasting side of the rocks, forming cross-section generation, and smitten rock placed in the mined-out space of the reservoir in the form of a rock band and in its marginal area adjacent to the walls of the excavations, serves under pressure, for example, through the perforated pipe fastening solution. Bond rock solutions are known (see, for example, A. C. USSR N 691567, E 21 D 41/04, E 21 D 11/00, 1979). However, the bond of rocks in this case is possible only in cases of occurrence in the roof legkoobuchaema rocks with their bypass. This is possible when carrying out excavations at the seams with the angle of incidence of more than 36o. At smaller angles of incidence of the reservoir collapsed rocks of the roof uncertain fractional composition are placed under the angle of repose and not necessarily in close proximity to the walls of the excavation. In addition, due to the small ratio of the loosening of rocks in their natural collapse between the collapsed and neopushennye layers of the roof remains free space for filling which will need a large amount of binding material and the hardening accelerator.

The physical essence of the method lies in the fact that as a means of protection unlike the prototype and other well-known re the which strengthened breed peripheral part, adjacent to the walls of the excavations conducted, and the rest of rock band is not hardened. And the non-reinforced and reinforced parts of the strip are calculated according to the obtained results from the condition exclusions or significantly reduce the negative impact of treatment works (as defined deformation) and the simultaneous balancing of the loads specified in the discharge zone. In addition, the mechanism of distribution of stresses and strains in the selection array operates in such a way that part of the rock mass rock popley, not subjected to hardening and with greater compliance, promotes relaxation elevated stresses arising in the conduct of sewage treatment works, ensuring the preservation of such values of the resistance of the hardened part of the strip, whereby the maximum extent preserves the natural carrying capacity of the roof, and maintaining it in a stable state during the entire lifetime output.

The method is illustrated by drawings, where Fig. 1 shows the projection in the plane normal to the unconformity, single-output, protected by two rock bands, Fig 2 shows the projection in the plane normal to the unconformity, two changing technology of the passage and protection of two parallel openings.

In the drawings denote: 1 - output, 2 - coal seam, 3 - powered system, 4 - hole, 5 - crushing - filling complex, 6 - goaf formation, 7 - rock band, 8 - injection installation, 9 - bonded part of a rock band, 10 - regional part of the coal seam 11 - borophaginae installation, "t1"the distance to the maximum bearing pressure, t is the width of the non-bound part of a rock band, "T" is the distance between adjacent walls of two parallel openings.

The method is as follows.

When the protection of a single generation 1 (Fig. 1 and Fig. 3) take a wide clearing face coal layer 2, for example, using mechanized complex 3. Then the blasting charges BB in the holes 4 are breaking the roof rocks and soil formation along the contour generation. Smitten rock with crushing fill complex 5 is placed in mined-out space 6 in the form of rock band 7. By known techniques to determine the distance "t1" from the walls of generation 1 to the maximum reference pressure, which is due to the elevated stress possible destruction of the rock mass, capacity development, and at this distance from the walls of generation 1 in the elemental-sand mixture. In areas of rock bands located between the bonded parts 9 and marginal parts of the layer 10, the crimping solution is not available.

Under the protection of two parallel openings (Fig. 2 and Fig. 3) pre-determine the distance "T" between adjacent walls of the openings. Distance accept therefore, in order to avoid interference workings and be placed in mined-out space of the reservoir estimated volume of rocks obtained during the sinking of the mine workings. Then mount the mechanized complex 3 and take out the coal layer 2. The broken coal from the face system peregrine conveyors issue on the main scraper or belt conveyors. Burkparsons installation 11 drilling the holes 4, charge them in BB and beat rocks the roof and floor of the reservoir. Crushing-filling complex 5 smitten rock is placed in mined-out space 6 in the form of rock band 7. In the marginal parts of the rock band adjacent to the adjacent walls of the openings, the distance "t1"that is defined by the location of the maximum bearing pressure, injection installation 8 provides a fastening solution. Part of the rock band 7 width "t" equal to not less than twice the width of the hardened part of a rock band, the remaining is when doing cleaning work and for most geological conditions take not less than twice the distance from the wall framing to the maximum bearing pressure.

Compared with the prototype and other known technical solutions proposed method provides an operational state of the reservoir openings throughout their lifespan, environmental cleanliness in underground mining (leaving the rocks in the mine), the combination treatment and tunneling works and provision of associated coal mining.

1. The method for reservoir protection of excavations, including one or more parallel excavations, the excavation of the reservoir wide face, blasting the side of the rocks and placing them in mined-out space of the reservoir in the form of a rock band, characterized in that edges of the rock band adjacent to the walls of the produce served fastening solution.

2. The method according to p. 1, characterized in that the crimping solution served in a rock band at a distance from the walls of the excavation is not less than the distance to the maximum bearing pressure.

3. The method according to p. 1 or 2, characterized in that when two or more parallel openings between the hardened solder parts rock band leave the non-reinforced part species the width equal to not less than twice the width of the hardened part of the rock n the

 

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