RU2513607C2 - Method to prepare and mine reserves of minefields - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: method includes extraction of coal in a long working face by retraction, ventilation of the working face, control of mining pressure by damage of roof rocks in the mined space, collection of minefields in the lower points of the mine and supply of aqueous solution of antipyrogene into the mined space. Extraction pillars are mined in turns with reverse and forward strokes. In advance they erect a dismantling technical inspection and installation chambers coaxially. The longwall mechanised equipment set - LMES - is driven into the dismantling chamber without a thrust at the chamber roof. The elements of the set are moved in blocks by three from the dismantling chamber into the installation one, on the way they do routine maintenance as the blocks move in the technical inspection chamber, at the same time they use movement mechanisms of thrust-sliding-sliding type with autonomous power supply to each block. The mechanism of movement of thrust-sliding-sliding type they use the same sections of the LMES support and their interconnection via movement cylinders with the appropriate chute of the longwall face conveyor. For the period of dismantling they create n autonomous blocks of three with alternate movement of 3 sections of the support without thrust relative to 3 chutes that serve as a stiff beam.

EFFECT: method speeds up installation of LMES into a dismantling chamber, makes it possible without technical facilities of delivery to do the re-installation under its own power from longwall face to longwall face of the LMES in blocks of three, to re-install longwall face of 450 m for 10 days, 300 m for 5-7 days, which will make it possible to increase efficiency of LMES usage.

2 cl, 2 dwg

Description

The invention relates to mining, in particular, to methods for developing mine fields according to the development system "Long salts along strike", and can be used in the extraction of other reservoir minerals.

There is a method of developing a mine field during floor preparation, in which the extraction columns are prepared by conveyor and ventilation drifts, the column is being worked out in reverse, rock pressure is controlled by the complete collapse of the roof in the worked out space, and the ventilation face is ventilated according to the countercurrent scheme [1].

The disadvantage of this method is that when finalizing the excavation column, the treatment mechanized complex (OMK) is used to secure the dismantling chamber; mining is carried out in the opposite direction with the mounting chamber on the flanks of the extraction column, which complicates the re-installation of OMK from lava to lava.

The technical solution closest to the claimed method was adopted for the prototype, in which the extraction columns are prepared by conveyor and ventilation drifts, the columns are worked out in the reverse order, the rock pressure is controlled by the complete collapse of the roof, the installation is carried out by phased dismantling of the OMK with delivery to the surface of the mine with the subsequent assembly of elements of the complex , for example, lining sections with a dismantled lava conveyor and combine [2].

The disadvantage of the prototype is:

- pillars work out only in the reverse order;

- the dismantling chamber is carried out using OMK;

- the remoteness of the places of dismantling and installation on the length of the column;

- when the OMK resource is available for one or two more columns, it is disassembled to the surface, then it is lowered and mounted partially assembled;

- a complex remounting scheme with the arrangement of disposable assembly delivery vehicles;

- unproductive use of OMK.

These disadvantages of the method reduce the efficiency of the development of mine fields, which does not allow to use it to reduce the cost of remounting OMK.

The aim of the invention is to increase the efficiency of the development of a coal mine field with a decrease in the cost of re-installing OMK.

This goal is achieved by the fact that in the method, including the preparation of the mine field with pillars according to the development system “Long Poles along the strike”, the extraction of coal in the long face of mine backwind, ventilation of the face, control of rock pressure collapse of the roof in the worked out space, collecting mine water at the lower points of the mine and the supply of an aqueous solution of flame retardant to the mined-out space, the extraction columns are worked out alternately by reverse and forward stroke, pre-dismantling, inspection and Mounting camera coaxially.

Then OMK is driven into the dismantling chamber without pressure in the roof of the chamber, the elements of the complex are distilled block by block from the dismantling chamber to the assembly one, the repairs are carried out along the path of movement of the blocks in the inspection chamber, while the mechanisms of movement of the expansion-sliding-sliding type (RCC) are used power supply of each block.

The complex starts up in a prepared fixed mounting chamber without supporting the support section in the roof of the chamber using the sliding-sliding-sliding movement mechanism (РСС / 3) through the existing interconnection of the support sections through the movement cylinders with the main conveyor (beam), then blocks, 3 sections with 3 pans (three), deploy in the direction of installation and drive it under its own power to the installation site, deploy block by block (in triples) to its original position. With self-ceremony.

On the way to moving blocks, an intermediate inspection point is constructed to replace OMK’s rapidly wearing elements.

Figure 1 shows a diagram of the preparation of the mine field, explaining the method of developing the reservoir with the re-installation of OMK from the dismantling chamber to the assembly chamber with an intermediate inspection chamber.

Figure 2 shows the remounting of OMK with weak rocks of the roof.

The method can be implemented as follows.

The coal seam of the mine field is opened by flank conveyor 1 and air supply 2 slopes with access to the main conveyor slope 3 by conducting paired mine workings from the flank of the industrial site No. 1, of which one as the main conveyor drift 4, the other as a ventilation drift 5 of the first lava 6. At the same time by making slopes 1, 2 from the industrial site No. 2, installation 7, dismantling 8, inspection 9 of the chamber are being constructed, followed by conducting paired lengthy mine workings 10, 11 according to a constant scheme. Before the start of treatment work, drainage systems 12 are equipped.

Before OMK 13 approaches the dismantling site with a previously taken dismantling chamber under its own power without interruption, OMK enters into it with subsequent disconnection to

triples, starting from the pans of the main conveyor and hydraulic elements, forming the nth number of blocks. Starting from block n-1, the first from the side of the conveyor drift, the first three along with the drive head of the main conveyor moves through the inspection point along the mounting chamber to the initial position for a turn, leaves the drive head at the installation site, then turns 90 ° to the chest face, docking pans with a drive head. They also do the same with triple blocks n-2, n-3, etc., including the latter, which, as the closing one, also delivers the end head of the main conveyor. But before that, a shearer is fed to the lava conveyor, which has been in the inspection chamber all this time, undergoing current repair.

Prior to re-assembling into the next second lava 14, 3 wellhead long mine workings of the conveyor 15, the whole 16 and the ventilation 17 drifts are completed, and the drift 15 is carried out according to a constant pattern with the end head of the conveyor belt being interfaced with the mounting chamber prepared for mounting the drive the head of the lava conveyor in accordance with the device downhole loading point, according to ed. for invention No. 576426 of 10/15/1977 and the application for invention No. 2012132763 of July 31, 2012 for “Face slaughtering device”.

The following mine workings 18, 19 are carried out by analogy in this case, as the final 2-wellhead at the boundary of the mine field. Mining of preparatory and treatment works is carried out separately with the alternate use of flank industrial sites, ensuring the continuous operation of production lines with coal supply to the central site. Transportation of people is carried out by conveyor belts using the upper and lower branches and means of descent and landing both at the central industrial site and at workplaces in the faces of both treatment and preparatory mining operations. Materials and equipment are delivered using diesel haulers.

Dismantling and moving blocks of triples with a stable roof of the chamber begin from the side of the conveyor drift, with an unstable roof - from the ventilation drift, as it were, from top to bottom, while the width of the chamber increases.

The method of re-assembling OMK with weak rocks in terms of stability in the formation roof is characterized in that the dismantling chamber extends to the width necessary to place the block triple between the OMK and the side of the chamber, calculated as the space from the edge of the trench of the main conveyor (for example, with a width of one section equal to 1, 5 m, to accommodate the triple this space must be at least 4.5 m).

Dismantling in such chambers is carried out in the reverse order from the fan track with the movement of block triples partially protected by the sections of the OMK support (see figure 2).

In all methods, OMK is put into the finished chamber for dismantling without interruption. To keep the roof of the chamber at the point of its rupture by collapse from cleaning operations at the end of OMK entering the dismantling chamber, the roof of the chamber 8 is fixed in advance from the obstruction side with two anchors in two rows, for example, rope, according to the passport, taking into account that the elongated anchors are 20 are installed in the zone of collapse of the roof rocks at the contact of the formation-rock, taking into account the further fulfillment of the function of the fence 21 of the working space of the dismantling chamber from the collapsed roof rocks (view from A-A of FIG. 2).

The second row of elongated anchors 22 is installed in the zone of indestructible rocks, as the organ row of the camera mount on the side of the blockage. As the OMK section is dismantled, the camera is supported by installing control mounting posts on the side of the block at the installation site of the elongated anchor (organ row).

In a long 450-meter long lava of 300 sections of lining with a step of 1.5 m each, 100 blocks of triples are created in the dismantling chamber. With a path of movement of ~ 500 m, including the inter-main rear sight, and a turnaround time in the dismantling chamber of 2 hours, driving at a speed of 1 m / min for 500 minutes, a turn in the mounting chamber with connections in 2 hours, the total time for one block is 2 h + 9 h + 2 h = 13 h plus unaccounted downtime for 1 hour. Total time per cycle of one triple is 14 hours. Assuming a break in the readiness time of the next unit for 2 hours, with all other operations with all triples as combined, the total remounting time will be: 1 day for the preparation of the dismantling and assembly scheme plus 100 blocks × 2 hours = 200 hours or 8 days; one day for the installation of the combine and completion of work to the starting position for coal mining - 10 days with a length of lava of 450 m, and with a length of 300 m of lava, respectively, 1.5 times less - 6-7 days.

Organizationally, to reduce the total time, there should be miners: reversers, respectively, both in the dismantling chamber and in the assembly room with technical equipment for turning; carriers of three blocks for each block, two people each, while moving out of 100 blocks and installing them within 10 days, 10 pairs of drivers for each shift. With a well-thought-out organization and technology, the re-installation time can be reduced by half.

Information sources

1. Zhigalov M.L. Technology, mechanization and organization of underground mining. Textbook for universities. / M.L. Zhigalov, S.A. Yarunin. - Subsoil, p.330.

2. RF patent No. 2284414. A method for developing a shallow coal seam, published September 27, 2006

3. Chernykh N.G. Mechanisms of movement of mining machines. M .: Coal, p. 48-51.

Claims (2)

1. The method of preparation and processing of mine field reserves, including the preparation of the mine field with pillars according to the “Long Pillar along strike” development system, the extraction of coal in the long working face with the reverse stroke, the ventilation of the working face, the management of rock pressure by the collapse of the roof in the mined out space, the collection of mine water at the lower points of the mine and the supply of an aqueous solution of flame retardant to the mined-out space, characterized in that the extraction columns are worked out alternately in reverse and forward motion, pre-build a demo the technical inspection and assembly chambers are aligned, then the mechanized treatment complex — OMK — is pushed into the dismantling chamber without pressure in the roof of the chamber, distilled by three elements of the complex from the dismantling chamber into the assembly chamber, and along with it, routine repairs are carried out along the path of the blocks in the inspection chamber, using mechanisms movement of the spacer-sliding-sliding - RCC type with autonomous power supply of each unit. 2. The method according to claim 1, characterized in that as the mechanism of movement of the expansion-sliding-sliding - RCC type, the same sections of the OMK support are used, their relationship through the movement cylinders with the corresponding pan of the main conveyor and form n- for the period of dismantling from them e is the number of autonomous blocks of the “troika” with the alternate movement of 3 support sections without support relative to 3 pans that perform the functions of a rigid beam.

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