SU1280131A1 - Method of preparing a group of steep explosion-hazardous seams for mining at great depths - Google Patents

Abstract

The invention relates to mining; The goal is to increase the efficiency, reduce the time required to prepare the reservoirs for development and increase the safety of mining operations by increasing the efficiency of the explosive action of the reservoir within the excavation field. In the prepared excavation field (block) III: L 3 (Looo 00 oo

Description

lead group field drift 2. Then, cutting 6 of the discharge lava (X-ray) 7 is carried out and proceeding to working out the protective layer. Removing the rock layer by moving X-ray 7 from hanging to the lying side of the suite produces intersection and part-time processing of all the boards within the excavation floor, and this protects the layers from emissions of coal and gas. Then, an industrial elevator 3 is constructed. When it is constructed, drilling and blasting operations of BRL 7 are performed simultaneously. At the approach of RL 7 to any formation 1 after

the excavation of the coal seam face stops. The rock is excavated along the entire length of the lava over an area equal to the cross-sectional area of the excavation drift 11, and temporary lining is installed. By erection of metal lining with puffs, a reinforced excavation drift 11 is constructed. This makes it possible to increase the pace of conduction, reduce the labor intensity and the cost of conduction. After all the work on unloading the formations of coal seams is performed, they are simultaneously removed. 2 Il.

one

FIELD OF THE INVENTION The invention relates to mining and is intended to prepare for the efficient and safe development of deep-sea emissions.

and shock-hazardous formations — steep padefiHa when opened with their trunks and the floor with 1st cheshlags, followed by grouping through intermediate crosspieces into field group drifts.

The purpose of the invention is to increase the efficiency and reduce the time required to prepare formations for development and to improve the safety of mining operations by increasing the effectiveness of the protective effect of the overlying formations within the excavation floor. FIG. Figure 1 shows a section across the strike of a part of the coal-bearing stratum and a general view of the method of preparing the formation of steep strata for development, the pattern of forming a relaxed zone within the excavation floor (block) by excavating a layer of rock at its base; in fig. 2 shows a section A-A in FIG. 1.

In the mine field, opened by trunks and storey chests, coal coal 1 of the floor (Fig. 1) work on group field drifts 2 through intermediate quarters 3, separating the mine wing on the excavation floor (blocks) 4 on the side of the block 5 (Fig 2). The numbers J, II and III show, respectively, the developed, developed and prepared floor (blocks). In FIG. 1 and 2, the following notation is used; cut 6, discharge lava 7, protective rock layer 8, zone 9, unloaded from mountain and gas pressure, end section 10 of the clearing hole, reservoir excavation drifts 11, ventilation sledka 12, developed space 13 of discharge discharge lava 7.

The method is carried out as follows.

The formation of coal seams 1 is prepared, for example, from the height of which block 5 of the seams 1 in the following sequence.

At the first stage, in the prepared excavation field (block) III, a group field otkatnyi drift 2 is carried out, and then it is applied to it

Claims (1)

or at some distance from it, cutting 6 of the discharge lava 7 to the whole is carried out by a drilling and blasting method. the length of the excavation floor (block) III s and proceed to the development of the protective layer 8 using drilling and blasting operations. To do this, in the bottom hole of the hole, the bore-holes are charged, for example, with non-explosive destructive substance such as HPC-1, and a strip of rocks is cut along the entire length of the discharge lava 7 to a depth of penetration. Part of the broken rock mass is transported, for example, by conveyor or scraper to industrial slats 3 and further along the group drift 2 to the trunk, and a part of the rock is left in the worked-out space of the discharge lava 7, and the mine face 31 is fixed with a solid, for example, wooden lining. The excavation of the rock layer by moving unloading lava 7 from the hanging to the lying side of the suite intersects and undermines all layers within the excavation floor (block), resulting in a displacement of the rock mass under the influence of gravitational forces and the formation of unloaded from and on to the front of the lava gas pressure and gas pressure of zone 9. This ensures complete protection of all layers of the 1st suite from emissions of coal and gas and other gas-dynamic phenomena and the possibility of their development without the use of special blowout measures tiy .. At the second stage of preparation, at the end Section 10 of the clearing intake, an industrial furrow 3 is constructed, for which drilling and blasting of blast holes are carried out simultaneously, with drilling and blasting operations in the discharge lava 7 and after harvesting the rock, permanent support is erected. This technological operation eliminates the time-consuming work on the opening of the discharge layers and contributes to an increase in the production of the convolution plate. At the third preparation stage, when the discharge lava 7 approaches to any formation 1 after the coal mining, the lava mine bottom is stopped, the rock is excavated over the entire length of the lava by area equal to the cross-sectional area of the excavation drift 11, and establish a temporary lining. Then, metal lining with tightening was erected simultaneously in several places, thus constructing a layer extraction drift 11. After the permanent lining was erected in the drift 11, the work in the discharge lava 7 was performed in the usual order. Thanks to this method of conducting the excavation drift 11, the pace of conduction will dramatically increase; the need for installing local ventilation fans will be eliminated, since the drift 11 and lava 7 will be ventilated due to a general depression through ventilation failure1412, as well as the labor intensity and the cost of conduction. the drifts will be located in the worked-out space 13 of the discharge lava 7, this will lead to a decrease in the value of the reference pressure when conducting cleaning works in the lavas of the protected formation s, will provide better sustainability and reduce the cost of maintaining them. After all the unloading operations of the coal seam are completed, they are simultaneously removed. The invention of the method of preparing the suite of steep outburst formations to the development at great depths, including conducting a field drift, first priority development by the mining face of the discharge rock layer, carrying out excavation drifts and intermediate cross-sections on the unloaded layers, and that, in order to increase efficiency and reduce the time required to prepare the seams for the development and increase the safety of mining operations by increasing the efficiency of the protective action The formations within the excavation floor, the cleaning face of the discharge rock layer are located along the strike of rocks between the intermediate cross-sections and move it in the direction from the field drift across the strike from the lying or hanging sides of the suite to the intersection with the discharge layers of the suite for the entire length of the excavation saw limited intermediate cross-sections, while in the developed space of the clearing inlet and discharge rock layer along its entire length at each intersection with a coal seam I construct shearer and drift at the end portion slaughtering - further intermediate crosscut, and a recess on carbon outburst coal seam is produced at the same time t after the completion of the recess along the full length species excavation floor.