Method of mining coal seams chamber-and-pillar system

 

The invention relates to mining and can be used in chamber-and-pillar system, the development of gas-bearing coal seams gentle fall. The method involves performing parallel roadways along the strike of the seam, cutting extraction of pillars with sbec connecting these developing, and testing their benches, and for ventilation of the extraction field serves fresh air, followed by abstraction of the outgoing jet. Excavation field prepare two blocks, leaving between them along the dividing pillar connected to each other on the flank of Bonami. The notch dividing pillar carried out simultaneously with the development of the extraction field and prepare it for the excavation carried out ahead of the line testing field for 1-2 mining of the pillar. When developing fields of fresh air can be submitted through the workings of one block, and the outgoing stream divert through the workings of another block. Mining the pillars in the block, through the workings of which divert outgoing stream, in production, which produce the hollow pillars, may additionally fresh air with the help of local ventilation fans. The invention is aimed at improving efficiency is key and anchoring. 2 C.p. f-crystals, 4 Il.

The invention relates to mining, namely the underground development of mineral deposits, and can be used in the chamber-and-pillar system, the development of gas-bearing coal seams gentle fall.

Known chamber-and-pillar system of development of coal seams, including the sinking of the brake incline, holding cameras for the entire length of the extraction field and practicing mezhdurebernyh pillars of the benches of the cameras (A. C. Burdakov. Technology of underground mining of bedded deposits of minerals - M.: Nedra, 1983. C. 318-319).

The main disadvantages of the known technology of coal extraction are:

- the high complexity of the holding chambers for the entire length of the extraction field and the complexity of airing them as boring, so when developing mezhdurebernyh pillars;

- low productivity of the faces, because the notch is produced using drilling and blasting operations.

Closest to the proposed method to the technical nature solved the technical problem and the total essential features of the technology is the development of coal bed chamber-and-pillar system using high-performance techniques of enterostenosis, belt conveyors and other (patent US 4512610 a, E 21 41/00, 23.04.1985), adopted for the prototype. By known techniques of excavation field prepare, for example, parallel drifts and Bonami width of 6 m with cutting excavation pillar size 1212 M. the Hollow pillars are benches directly from preparatory or slotted openings.

The main disadvantage of this method of testing is the bottleneck technique used to factor airing, especially when developing gas-bearing formations. Feeding large amounts of air through the workings not preclude the need for use of ventilation faces a large number of local ventilation fans due to significant leakage of fresh air in the outgoing stream via jumpers.

The technical objective of the claimed invention is to eliminate these disadvantages, as well as a reliable and sustainable supply of fresh air Stopes when developing gas-bearing formations.

The specified technical task is solved in that a method of mining coal seams chamber-and-pillar system includes the parallel workings along strike layer is of very the air, followed by abstraction of the outgoing jet. Excavation field prepare two blocks, leaving between them along the dividing pillar connected to each other on the flank of sonami, and the notch dividing pillar carried out simultaneously with the development of the extraction field and prepare it for the excavation carried out ahead of the line testing field for 1-2 mining of the pillar.

In addition, a fresh stream of air supplied through the workings of one block, and the outgoing stream divert through the workings of another block.

And when the hollow pillar in the block, through the workings of which divert outgoing stream, in production, which produce the hollow pillars, optionally using local ventilation fans fresh air.

These characteristics are essential and interrelated with the formation of a stable set of essential features, sufficient to obtain the desired technical result.

The proposed method of mining coal seams chamber-and-pillar system is carried out mainly with the use of self-propelled equipment, anchoring and conveyor transport.

The possibility of carrying out the invention described above, approved by the description of the example implementation of the proposed method of mining, made in accordance with the invention, the essence of which is illustrated graphics, where Fig.1 shows a diagram of the preparation of the extraction field and development of extraction of pillars in block II of Fig.2 - development of extraction of pillars in block I of Fig.3 - development of the mining of pillars one-sided benches; Fig.4 - development of the mining of pillars with double-sided benches.

Excavation field opened three trunks, passed through the formation of coal: ventilation 1, the conveyor 2 and path 3. The drop box is divided into blocks I and II, leaving between them along the dividing pillar 4, which are removed simultaneously with the development of the extraction field. Size separation of the pillar to fall chosen equal to the size of the decline of the mining of the pillar, i.e., when the size of the mining of the pillar 2525 m width of the dividing pillar shall be 25 feet Each block respectively prepared parallel preparatory workings 5, 6, 7 and 8, 9, 10, passed along strike, and Bonami 11 and 12, through which cut excavation pillars 13 in block I and 14 in block II.

On the flank of the extraction field blocks are connected by Bonami 15, passed through the dividing pillar 4 and serving for podchorazych trolleys and other mechanisms from the faces to the belt conveyor 17 and back.

The airing of the extraction field carried out according to the following scheme. Fresh air from the ventilation shaft 1 acts in parallel preparatory development 8, 9 and 10 of block II, then through the flank of the breakthrough 15 enters the block I and the next outgoing stream passes through the parallel preparatory workings 5, 6 and 7, block I, going in the formulation 5 and is discharged through crossing 18 in the track shaft 3. In this scheme within the extraction field there is only one gateway 19 and jumpers 20 in the security pillar 21, which does not have a significant impact on the stability of ventilation, because it is installed on the outgoing stream.

For excavation pillar 14 in block II are harvester cutting production 22 width 5.5 m benches 5-6 m, at the same time are cutting production in two pillars 14, then in the pillar 16, are linkage 15 and end up holding the slotted openings in the pillars 13. After excavation of the next Zachodni harvester moves on to another generation, and in this section enter alternately shown and the deliveryman. Airing benches when conducting slotted openings 22 and sboc 15 is performed with the use of local ventilation fan (VMP) 23.

The refinement of the extraction field chamber-and-pillar of system - 1 pc.;

- shown CHDDR-13 - 1 PCs;

diesel self-propelled carriage capacity of 17 tons (diesel Ramcar 4116) - 3 PCs;

- diesel supplier FBL-10 - 2 PCs;

- crusher-feeder MIN-56A - 1 PCs;

- belt conveyor LT-100 - 1 PCs;

- mobile support - 4 pieces;

diesel self-propelled tanker - 2 PCs;

- CD-station 1250 kVA -1 piece;

- system information transfer Mini SCADA - 1 PCs;

- VMP - 2 slave. + 2 rez. and other

The excavation of the coal in the pillars can produce single-sided or double-sided benches. When the recess of the one-sided benches combine Continuous Majer SOS comes in a split development 22 and produces the notch coal benches 24 from one side of the pillar, retreating to the linkage 12, and after excavation goes into the production of 9 and similarly takes the second Board of the pillar. The double-sided benches combine split from generation 22 takes out a section length of 9-10 m and a width of 3.3 m first from one side, and then goes to split production and selects a similar section with the other hand. It is also possible double-sided benches to take out the pillars of the openings 8 and 9 (from generation 10 - sided Zachodni), with production split 22 is not performed. In all variants on a pair of benches 24 with split draw the universi 25 (or double organ series), which move remotely. After excavation of coal Zachodni not fixed and leave between them the whole width of approximately 1.0 m

Split production fresh air flows from the openings 8, 9, 10, and airing of zagadki 24 length 9-10 m produced by paliatsos combine with a capacity of up to 5 m3/s Polluted air is sucked from the bottom zagadki, and due to vacuum it receives fresh air from split or preparatory development. Due to mine depression (compression) and pressure created by the dust-extraction device, the outgoing stream of the pillar 14 partially on Sonam 15 and partially through the goaf goes into the production of unit I and is given in a traveling trunk 3. Transportation of extracted coal exercise diesel and self-propelled trolleys type DR 4116 to the belt conveyor 17 with the hopper-feeder and crusher, installed in the development of 8 in block II, and then to a conveyor shaft 2. To ensure the safe movement of self-propelled equipment in the mining field in the hollow pillar in the block II should be ahead of the line a-a of a longwall field, at least one linkage 15 in the separation pillar 4, and the hollow pillar in block I at least two sat the 14 in block II, associated with the risk of zagazovany and is unstable, because in the split 22 production or generation 5, 6 and 7 (depending on the selected schema extraction of pillars) on the one hand receives fresh air from the workings of block II, and on the other hand - polluted air from the goaf in the General movement of the jet to the trunk 3. To avoid this danger in cutting production 22 or in generation 5, 6 and 7 when mining the mining of pillars 13 unit I served additionally fresh air with VMP 23 installed in one of sboc 15 in the separation pillar 4. Due to this split in the development creates sustainable differential air pressure relative to the goaf, which eliminates the danger of taking it polluted air.

The present invention is industrially applicable as the development of coal seams is made by using modern technology using an existing high-performance equipment.

Claims

1. Method of mining coal seams chamber-and-pillar system, consisting of parallel openings along the strike of the formation, the preparation of the mining of pillars and practicing their benches, with audica fact, that excavation field prepare two blocks, leaving between them along the dividing pillar connected to each other on the flank of sonami, and the notch dividing pillar carried out simultaneously with the development of the extraction field and prepare it for the excavation carried out ahead of the line testing field for 1-2 mining of the pillar.

2. The method according to p. 1, characterized in that a fresh stream of air supplied through the workings of one block, and the outgoing stream divert through the workings of another block.

3. The method according to p. 1 or 2, characterized in that the hollow pillar in the block, through the workings of which divert outgoing stream, in production, which produce the hollow pillars, optionally using local ventilation fans fresh air.

 

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FIELD: mining industry.

SUBSTANCE: method includes driving of layer transporting and ventilation mines along soil and ceiling of bed, in massive and in extracted space, cutting of cleaning mines in cross-section of bed at angle of 27, mechanized delivery of coal along bed mines to coal furnaces and vertical dropping of coal to furnaces. Extraction of slanted transverse bed is performed along bed diagonals having direction to horizon at angle of 27, to provide for free sliding of coal without degradation. Delivery of coal from cleaning mine placed at angle of 60 to layer mine, to back field mine is performed by self-delivery from any place of extraction field along layer mine, field coal-lowering mine and field slanting coal furnace, being at angle of 27 to horizon. Field slanted coal furnaces are placed at distance from one another along 20 m normal. Field coal mines in form of fans of three mines are connected on field slanted coal furnaces at distance of fan start from one another of 60 m with output of mines ends to each layer mine of group of three above-lying slanted-transverse layers for whole diagonal length of extraction field at distance between mines outputs along layer soil of 60 m. Ceiling of cleaning mines may be supported without load, utilizing mechanical traction on the side of ventilation furnaces for pressing moveable support tool to layer ceiling.

EFFECT: higher efficiency.

2 cl, 3 dwg

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