SU1244315A1 - Method and apparatus for hydromechanical excavation of steep coal beds by pillars in the dip - Google Patents

Abstract

-one . The method of hydromechanical excavation of steep coal seams with pillars in the fall, including carrying out coal-mining mines, forming a cleaning line at the bottom, blocking the downhole part of the reservoir with a hydromechanical shield, cutting the rocks parallel to the rocks and the roof of the formation supplying the shield to the bottom and transporting the broken coal, characterized in that, in order to increase the efficiency of the formation excavation by reducing the energy consumption t for coal blasting and simplified) 1 cleaning technology by eliminating the processes of maintaining and maintaining the bottomhole working space to accommodate panel overlap and coal extraction means; panel overlapping is washed out under its base; slots on the roof and soil of the formation are cut ahead of the clearing hole , to the image of an advance (CAVITY), in the cavity, as they are washed down, the shield overlap is lowered and the formed intercoeral coal pillar is covered with it, which is destroyed by the shield overlay, starting from the roof And repulsed coal is transported through a cavity formed in the layer of soil. 2. The method according to claim 1, wherein the cavity and the fact that the formation of cavities and the destruction of the inter-marginal coal pillar is carried out simultaneously along the entire length of the refining slab 3. The method according to claims. 1 and 2, in order to ensure coal transport, the line of the clearing face is formed with a deflection in the direction of the coal discharge generation, and the latter is conducted in the middle of the excavation column, while in the cavity on the side of the soil place the charcoal gutter. 4. A device for hydromechanical excavation of steep coal seams with pillars in the fall, including a shield (e cover, equipped with hydraulic cutters with jet-forming nozzles, a carbon destructive element and a coal drain chute, only because the shield overlap made in the form of sliding U-shaped sections, consisting of submerged walls, one of which is made in the form of a wedge, and the opposite wall, which is located below the level of the wedge apex, is equipped with an additional coal drain chute. according to claim. 4, l u t of chayuschees in that the sections are connected ringtone is movably them relative to one another. Since CO

Description

The invention relates to the mining industry and is intended for the hydromechanical shaping of steep coal seams with columns in the fall.

The purpose of the invention is to increase the efficiency of the reservoir by reducing the energy consumption for coal blasting and simplify the purification technology by eliminating the processes for maintaining and maintaining the winnowing workspace to accommodate the shield and coal removal tools.

FIG. 1 shows a diagram of a deserted formation excavation by a hydromechanical shield; in fig. 2 is a sectional view in FIG. one; FIG. 3 is a diagram of a hydromechanical extraction panel; in fig. 4 shows a section BB in FIG. 3

The method is carried out as follows.

The hydromechanical coal seam 1 consists of a series of sections 2, which are interconnected by articulated joints 3 and have the ability to move one relative to the other in a vertical plane .. Each shield section consists of two side walls 4 which end at the top and are blocked by 5 and interconnected by dovetail-type guides 6. From the lower end part, the side walls 4 are terminated with multi-jet washout cutters 7 with jet-forming attachments 8. Cutters 7 in cross-section have a wedge-shaped shape, and nozzles 8 are placed on the lateral surfaces of the wedge. The side wall 4 facing the roof of the reservoir, in the upper part below the overlap in the cross-section, is made in the form of a rectangular wedge with its top facing down.

Wedge 9 performs functions of the destructive element. The anticancer side wall 4 below the level of the top of the wedge 9 is provided with an additional expansion cutter 7 and an angled access chute 10. The chute 10 is made of an elastic material, but rather flexible, for example of rubber bands or polymeric materials. One side of the chute 10 is attached to the side wall 4 and is placed on semicircular brackets evenly spaced along the width of the walls 4. On the same wall 124

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The ke 4, under the overlap 5, houses the main line 11 with outlets 12, which are connected by them with the cutters 7. To the ceilings 5, the elements of expansion 13, which interact with the side walls 4, are attached.

In the lower and upper horizons, ventilation 14 and transport 15 drifts are drawn, with which the outpost column is outlined along the strike. In the middle of the pillar, a coal discharge is carried out. 16. The face of the entire cleaning line is equipped with shield sections, which cover the bottomhole hole.

15 part of the reservoir. At the first moment after the installation of the shield sections, its position remains horizontal. From the pump unit 17 to the shield along the central hydraulic line 18 serves the working

20 liquid. The liquid jets, pulled out of the nozzles, cut across the gaps, along the interstitial pillars, and destroy the intergap pillars with the wedge-shaped body of the cutters 7, resulting in cavities 18 and 19 on the soil and roof side. the cutters 7 are oriented so that the cavities form wider than the cross section of the cutter line 7. The additional cutter 7 simultaneously expands the cavity 18 from the storon of the formation soil. The bottom deflection is formed by increasing the fluid supply and the central sections of the shzit and limiting its supply to the flank sections. The deflection is formed in magnitude, based on the conditions of transportation of broken coal and control of rock pressure. When cavities are formed, a kind of flushing occurs on the side of the bottom of each section itself, as a result of which the bolt 1, under the weight of its weight and the broken rock held by the shield overlap, begins to slide downwards as the cavities are eroded, and with that slaughter

When the shield moves downward, the wedge 9 enters the cavity 19 from the side of the roof and creates a thrust in it, destroying the meschellum pillar blade 20. The destroyed coal of the pillar with the same wedge 9 is pushed into the cavity from the soil to the groove 10, and then it is washed off with water in coal-assisted mining 16.

Dredging is carried out

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Transportation of the broken corner from cutting the gaps and forming cavities is carried out along the same cavities by gravity in the form of pulp to making 16, and from the destruction of the inter-strip pillar port 20, coal is transported along the groove 10. The coal is dredged in an insulated and unventilated slaughter reduces the cost of energy to destroy coal. When the coal is excavated, the coal discharge generation 16 always remains filled with pulp, as a result of which a hydraulic seal is created that prevents the flow of gas into the generation. During the excavation of high-gas formations, a forced

vein gas in the degassing system of the mine. For these purposes, coal mines 16 are installed by placing pipes that are perforated on the surface, which is connected to a degassing system.

After the shield reaches the transport drift 15 with its deflection, the central sections of the shield are limited to supplying the working fluid and increased to the flank ones. As a result, the shield 1 is leveled to a horizontal position and dismantled. After-, the blowing column are worked out in the same way.

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Editor M.Tovtin

Order 3791/34 Circulation 470 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

 ,five

Compiled by V.Pushkarsky

Tehred O. Sopko Proofreader L. Patay

Claims (5)

-one. Method of hydromechanical excavation of steep coal seams with pillars in the fall, including carrying out of coal mining, forming a cleaning line of the bottom, blocking the bottomhole formation with a hydromechanical shield, cutting the rocks parallel to the soil and roof of the formation and separating the bottomhole formation of the formation for coal mining and transportation of repulsed coal 'in order to increase the efficiency of excavation by reducing the energy consumption for coal blasting and simplify the cleanup technology by eliminating processes for maintaining and maintaining the bottomhole working space to accommodate shield slab and means of coal mining, the shield slab is washed under its base at the roof> and soil formation cut ahead of the clearing face, forming a leading cavity, in the cavity as they erode, lower the shield overlap and cover the formed inter-cavity coal pillar with them, which is destroyed by shield overlap, starting from the roof of the reservoir, and the crushed coal is transported through the cavity formed near the soil of the reservoir. 2. The method according to p. ^ Characterized in that the formation of cavities and the destruction of the inter-marginal coal pillar is carried out simultaneously along the entire length of the stope. 3. The method according to paragraphs. 1 and 2, which is based on the fact that, in order to ensure gravity transportation of coal, the face of the crushing face is formed with a deflection in the direction of the coal-discharge generation, and the latter is drawn in the middle of the excavation column, while in the cavity from the soil side .plast place the coal drain gutter._ 4. A device for hydromechanical excavation of steep coal seams with pillars in the fall, including a flap overlap, equipped with hydraulic cutters with jet-forming nozzles, a carbon-disrupting element and a carbon drain chute, due to the fact that the panel overlap is made in the form of sliding U-shaped sections consisting of submersible walls, one of which is made in the form of a wedge, and the opposite wall, which is located below the top of the wedge, is provided with an additional coal-drain chute. 5. The device according to p. 4, characterized in that the sections are interconnected with the possibility of moving them one relative to another.