SU1035225A1 - Method of working gently-sloping medium-thick and thin coal seams - Google Patents

Description

The invention relates to the mining industry and can be used in underground mining of coal seams with an angle of incidence of not less than °, which is quite enough for a free flow of coal pulp on the soil of the seals without laying steel grooves.

There is a known method of developing coal seams, which includes the development of seams by paired excavation pillars, which are located both along the strike and diagonally, with a notch of cleaning passes in a downward sequence by jetting the coal with two-sided cleaning strokes along the strike or falling along the diagonal). At the same time, each such paired excavation column is prepared for the cleaning jetting excavation by conducting at least two mutually parallel rifted workings (drifts or furnaces), of which the medium is used as the excavation one, where the hydraulic monitor is located, and below it, the next generation performs the role of pulp extractor. The lower pillar (the ledge of the coaxial column, which is enclosed between the pulp and excavation workings, through an interval along the strike, or along a fall (diagonally) equal to the width of the clearing inlets, is cut through by slug-boreholes, from which the coal hydrotherapy begins in another cleaning Lu

The disadvantages of this development method are the significant likelihood of coal pulp getting into the excavation production during the hydraulic coal extraction in the upper column, significant coal loss, a large number of pulp-through kiln wells, which leads to a large amount of assembly and disassembly work.

There is also known a method of developing flat and sloping medium thickness and thin coal seams, including cutting up rising coaxial extraction poles by carrying out excavation and parallel with them pulppusknye furnaces, contouring the posts and meistholster coal pillars of coal, cutting pretreatment zones by contouring them. wells through an interval equal to the sloping width of the cleaning approaches to the fall, working-rising coupled

excavation pillars in the descending order of bilateral clearing inlets, recovered by shredding them from the excavation furnace wells, leaving intersectional and fur (columnar pillars angle.).

The disadvantages of this method are the significant overhead of time and labor

assembly and dismantling works, relatively high losses of coal in the depths, safety of mining operations is insufficient.

The purpose of the invention is to increase the efficiency.

5 efficiency of development by reducing the amount of preparatory work, reducing the loss of coal in the depths.

This goal is achieved by the fact that according to the method of developing low and inclined average power and thin coal seams, including cutting upwardly rising paired excavation pillars by carrying out excavation and parallel with them pulp suction holes, which contour pillars and cross column pillars, coal angle, cutting openings preliminary contouring of their transverse-diagonal sboiks-wells through an interval equal to the sloping width of the clearing inlets on the fall, working out of the rising coaxial In downward order, bilateral pillars, extracted by shavings using their hydraulic extraction from excavation chains, leaving intersectional and interstitial coal pillars, adjacent paired excavation columns double, the middle pulpusk furnace-well, along the line split them, adjacent excavation pillars are worked alternately with clearing inlets with coal blasting from both excavation furnaces-squa).

5 In addition, the interval between the inter-column pillars of the coal is assumed to be equal to the width of the twin paired excavation pillars, and the cross-pillars of the preliminarily delineated

0 imno parallel transverse diagonal sibleings-wells, the upper of which are used as cut-in stones „

The drawing shows the development system in the plane of the reservoir, a general view

The method is as follows. Accumulating under-storeyed floor) drift 1 passes through the seam for the entire length of the wing of the Bremsberg floor or excavation unit with a slope of at least 0.05 in the direction of the pulp receiver. After working out the sub-floor (floor) on this accumulating drift, it is completely preserved under the protection of the superstructure rear sight 2 and the development of the next located sub-sub floor, which is usually used as a ventilation drift. Above the drift sight 2, from the side of the reservoir uprising, is delineated by the first parallel drift 3, passed with the same inclination as the accumulating drift 1, and communicating with it through a hundred excavation furnaces 4, onboard (flanking; from the side of the formation of the contour of the well-bore holes and the middle pulpospuskoy kiln wells 6, located in the middle of the interval me) 1 (by excavating kilns k double poles. All kilns pass on the slope of the sub-floor (this) to the ventilation drift itself, together with the accumulating drift 1 and The first parallel drift 3. Contouring borehole furnaces 5 not only contour intercolumn pillars 7 and twin paired rising columns 8, but also perform the role of pulpuspus during hydrofluor coal from fan-shaped scabs during the excavation of the outer ledges (pillars) 9 cleaning stopping and; in the downstream sequence, from the excavation furnaces, k hydraulic monitors 10, fed with pressurized water by means of conduits 11. The pulpuspusny furnace 6 is located (in the middle of the interval between adjacent excavations) At the same time, am k, divides it into two adjacent ports (pillars 12), which are treated with cleaning pumps in the same downward sequence and the same ascend pereobraznymi shavings 11, 11-V111} from excavation furnaces with k hydraulic monitors 10, since all the positions from which the pillars of the columns are extracted also I am of these clearing stopovers. From the double digging kiln kauhda, two twin pillars 8 are designed for double-sided cleaning runs, including a ledge (pillar 9 and a ledge pillar) 12. At the same time, coal pulp from these is directed by gravity to corresponding pulp-through furnaces-boreholes 5 and 6, arranged along lines. boundaries along the strike of coupled pillars. Moreover, the pulp-bypass furnaces (otherwise 6 is the common border of twin paired pillars and round pulp-bypass furnace for adjacent ledges (pillars) 12, worked on it alternately. Cross-diagonal cutting-edge 13 and contouring bore-wells, except for their main functions, perform the role of ventilation connections and emergency exits between excavation furnaces j and pulp-bypass furnaces-boreholes 5 and 6. Vrubov sboi-boreholes 13 also perform the role of delineating the fur {landing pillars of the uprising party 15. the striking wells 1 simultaneously outlining the clearing stoppers 9 and 12 from the side of the uprising, and from the side of the fall - intersection uncoupling pillars of coal 15. Neighboring twin paired columns 8 by means of sboyeksbore holes 16, held in interstitial pillars of coal 7, in alignment with contouring holes and wells, communicate with each other through the interval for the rise (fall) of the reservoir, equal to the sloping width of one clearing stope. After all the cleansing stope is excavated in twin paired pillars, a part of the column pillar 7 can be removed and a jet stream. However, it is not possible to expose the collapsed rocks 17 or leave this pillar too narrow. Each consecutive two-sided clearance, of which not less than two in the twin coupled rising column 8, is removed by one of the jetting machines 10 from the excavation furnace (to the ditch 17 itself) to the rear pulp bypass furnace well 5, starting from the excavation of the ledge (pole) 9, separated from the dam 17 intersoliboles of the entire coal 7. At the same time, a ledge (column) 12 is dredged from the neighboring (front) excavation furnace A by the second hydromonitor 10 to the slurry furnace well 6. At the end of the excavation of both of the said ledges (columns) at this point True, both hydromonitors 10, not changing their positions, ONE-E temporarily switch to coal flushing from the second ledges (pillars). while the first hydraulic 10 (counting from the dam along the strike of the reservoir) works on the pulpuskuyu furnace 6 second step

Claims (2)

1. METHOD FOR DEVELOPING SLIDING AND INCLINED MEDIUM POWER AND THIN COAL STRESSES, including cutting uprising paired excavation columns by excavating and parallel slurry furnaces-wells, contouring pillars and inter-pillar coal pillars, cutting-off cutting sections boreholes through an interval equal to the inclined width of the treatment plant per fall, the development of uprising paired extraction columns in a descending order by bilateral sills, extracted by shavings by means of their hydraulic breakdown from excavation boreholes with leaving inter-entry and inter-pillar pillars of coal, characterized in that, in order to increase development efficiency by reducing the amount of preparatory work, reducing coal loss in the bowels, adjacent paired extraction columns they are doubled, the middle slurry-kiln-well is carried out along the line of their separation, adjacent extraction columns are worked out alternately by treatment Zahodki with breaking of coal from both extraction furnace wells. > 2. The method of pop. ^ characterized in that the interval between the inter-pillar pillars of coal is taken to be equal to the width of the twin paired extraction columns, and the inter-pillar pillars are pre-contoured by mutually parallel transverse-diagonal faults-wells, the upper ones of which are used as cut .. > 0 Woo! >