SU1751336A1 - Method of mining thick steep coal seams - Google Patents

Abstract

Purpose1 The invention allows the coal stocks to be re-opened in security pillars when working out powerful steep seams. The essence of the invention dredging begins from the hanging band of the side. After the assembly chamber is run into it, the combine goes down the ramp through the ort harvester. Then the harvester turns around and reaches until the central slope and goes into the opposite block, and so on until the layer is worked out. After each strip in the block is worked, the BUA-3 machine descends into it and produces side of the strip for installation of reinforcing rods. Simultaneously, the preparation and laying of the spent space of the cast hardening mixture is done. Ventilation of the bottom of the strip is carried out by a local ventilation fan. After the extraction of the horizontal layer is completed, the combine goes through the ort to the slope, goes down the next layer a layer of another artificial sub-pillar, etc. When dug out the last layer in each artificial pillar, the last strip of the lying side An empty hardening mixture and serves as a ventilation drift when excavating a corresponding sub-stage. The angle in the sub-floors between artificial pillars is removed using a hydraulic back-up in the chambers. repulsed corner hydrotransport Then, in the sub-floors, barrier pillars of cast hardening bookmarks, erected from each other at a distance of a step about Laying tabs The barrier pillars are removed by a hydromonitor from the subsurface gateway to the vent. After the cavity of the future barrier column is dredged, jumpers are erected on the underpass gateway from both sides, a 600-800 mm diameter pipe is passed through them for ventilation and is fed from the ventilation drift. hardening tab 1 sf f-ly, 9 il CO S XI cl with GJ CS

Description

The invention relates to the mining industry and can be used in the development of powerful steep coal seams with the laying of the goaf.

There is a method of developing steep coal seams including

transport, ventilation and coal mines, mining the reservoir in horizontal layers in a descending order with separation of the bottomhole space from that developed by a barrier lowered as each layer is dredged, and erection of the enclosing strips in each rear section, followed by filling with a conventional laying.

The disadvantage of this development method is the limited scope of application - steep and sloping layers of medium thickness, on thick layers there are difficulties with the creation of mobile pneumatic-ball support,

The closest to the claimed technical solution in essence and the achieved results is the method of developing powerful steep coal seams, including the carrying out of development workings and mining of the layer with horizontal layers in a descending order of alternating horizontal layers with laying the developed space - one with a hardening tab another with normal

The disadvantage of this method is that the development of powerful steep seams is not high enough due to the high labor intensity of the assembly and disassembly work of mechanized complexes.

The aim of the invention is to increase the efficiency of mining.

The goal is achieved by the fact that the excavation section is divided into sub-floors by the dip of the reservoir, which in the development of powerful steep reservoirs, which after one work out with the cast hardening bookmark horizontal layers in descending order, form artificial subsurface pillars, the coal between which is removed using hydrotreatment in the chambers, preliminarily contoured by barrier pillars from hardening bookmarks erected from each other along the formation strike at the distance of the pitch of the bookmark

FIG. 1 shows the technology of mining formation with a capacity of 4-8 m; FIG. 2 shows section A-A in FIG. 1, in Fig. 3-6, the order of the layer removal when creating artificial pillars; in Fig. 7, section B-B in Fig. 1: in Fig. 8, a recess and laying of barrier pillars; Fig 9 - excavation and bookmark cameras.

The method is carried out as follows.

The excavation field is divided into two blocks by ramps 1-3. The central slope is conducted in the rocks of the recumbent side of the reservoir, and in the alignment with it a slurry furnace 4 is conducted along the formation.

The dip field is divided into sub-floors. Sub-floors are processed one by one by horizontal layers 5 in a descending order with their notch strips along strike 6 mechano-hydraulic method with a cast hardening tab to form artificial pillars 7, the notch of the strips leads from the central slope (pulpopech) to the flank slope with a rise of 5 ° by the K56MG combine, and the delivery of the broken coal by hydrotransport to the pulpopech.

The notch starts from the hanging band of the side. After the assembly chamber is placed, it goes down the ramp through the ort harvester and the strip is dredged to the flange ramp, after which the harvester unfolds, reaches the central ramp and passes into the opposite block, and so on until the layer is completed. After each strip in the block has been processed, it descends into it.

5, the BUA-3 machine produces the sides of the strip for installation of the reinforcing bars 8, at the same time preparing for the laying and then laying the developed space of the cast hardening mixture.

Ventilation of the bottom of the strip is carried out by a local ventilation fan.

After the excavation of the horizontal layer is completed, the combine approaches the slope through the ort, descends through it and through the ort into the assembly chamber of the next layer of another artificial bottom pillar, etc. When the last layer is dug in each

In the artificial pillar, the last strip at the recumbent side is left unfilled with hardening mixture and will serve as a ventilation drift 9 when the corresponding substage is dredged.

5 The corner in the sub-floors 10 between the artificial pillars is removed using hydroturbing in the chambers 11

Then in the sub-floors erection of the barrier

5, the pillars 13 of the cast hardening bookmark, erected from each other at a distance of the step of the usual bookmark. The barrier pillars 13 are removed by a hydromonitor from a sublevel drift gate to a vent one. After excavation of the cavity of the future barrier pillar on either side of it, jumpers 14 are erected on the sublevel drift, a tube with a diameter of 600-800 mm 15 is passed through them for ventilation and is fed from the ventilation drift

5 lit. hardening tab. To reduce the pressure on the jumper, a portion of the bookmark 50-60 m1 is first supplied, and then after a day this cavity is completely filled. After the required strength of the filling mass is set, the jumpers are removed.

FIG. 2

FIG 6

Fig 7

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 - / -: 16 13

12

FIG. 9

Claims (2)

Claim 1. A method of developing powerful steep coal seams, including carrying out preparatory workings and working out the seam in descending order with a hardening and normal laying of the worked out space, characterized in that, in order to increase the efficiency of mining. the seam is divided into sub-floors, which, through one, are worked out with a cast hardening tab in horizontal 5 layers and form artificial sub-floor pillars, the coal between which is taken out by hydraulic breakdown in the chambers, which pre-contoured barrier entirely of settable bookmarks vozvo10 sary from each other in the formation strike distance Bookmarks step. 2. The method according to claim 1, with the aim that, in order to reduce the amount of preparatory work, a ventilation drift is formed in artificial pillar I5 of the last strip of the lower horizon, which are laid after working off all the chambers in sub floor. FIG. 1 . ΑζΔ δ-β 16 W FIG. 9 ,