RU1790682C - Shield powered support in mining steeply dipping and inclined beds - Google Patents

Abstract

The invention can be used in the mining industry for mining steep and inclined beds. The purpose of the invention is to increase the reliability of the support with weakly stable host rocks. The support is provided with a curved fairing, the surface of which is made in the form of an epicycloid. The sections of the shield cover are made of two parts (upper and lower), hinged to each other, and the visors overlapping the bottomhole space between the lining and the coal mass are equipped with chain rotation limiters. 9 ill. Yo

Description

The invention relates to the mining industry and can be used in the development of steep and inclined bed formations.

The aim of the invention is to increase the reliability of the support with weakly stable host rocks.

In FIG. 1 shows the initial position of the lining when excavating a strip of coal; in FIG. 2 - the principle of moving the lining to the landing step; in FIG. 3 - the position of the lining after moving it to the landing step; in FIG. 4 - the position of the lining after the excavation of the roofing bundle of coal; in FIG. 5 and 6 show the position of the shield support during the notch of a conveyor belt at incidence angles of 30 and 50 °; in FIG. 7 is a view A in FIG. 6; in FIG. 8 - the position of the lower part of the shield panel when planting on the soil

formation; in FIG. 9 - epicycloid fairing; in FIG. 10 is a view B in FIG. 9.

The development of a powerful steep or inclined formation (30-75 °) is carried out at full capacity.

Shield mechanized support consists of a protective support 1, a conveyor belt 2 and hydraulic equipment. The lining consists of separate sections (up to 2.4 m wide). The section consists of a cover 3, support skis 4, epicycloid fairing 5, intermediate 6 and main 7 hydraulic stands. The overlap includes the upper 8 and lower-9 parts, which are interconnected by a hinge 10. For the best use of the rock forces, the pressure of the collapsed rocks when moving the lining, while maintaining the stability of the lining, the upper

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The color of the ceiling 8 is set at an angle of 5-10 ° to the horizontal, and the lower part of the ceiling 9, depending on the conditions of movement of the lining. The lower part 9 of the overlap is assumed to be about 1/3 of the height of the lining in terms of power based on the use of the region of greatest pressure of collapsed rocks when moving the lining. The fairing 5 is made in the form of an epicycloid, which allows the lower part 9 of the overlap to lower to a larger angle, without wedging at the same time in the lower end of the fairing 5 on the ski 4. In addition, the friction of the lower part 9 of the overlap about the fairing 4 is reduced. 11 of the upper ceiling 8, visors 12 are pivotally mounted, sprung by spring jacks 13 and provided with chain limiters 14 of rotation. Chain rotation limiters 14 are fixed to the eyes 15 and 16. The hinged connection of the hydraulic stand 6 to the lower part 9 of the ceiling allows the use of rod cavities of hydraulic resistance 6 when moving the lining, this contributes to an increase in the movement force. The frame 17 for suspending the conveyor belt 2 is L-shaped and pivotally mounted on the fingers between two support skis 4; conveyor belt 2 with the help of r-shaped telescopic levers of the suspension 18 is pivotally mounted with a L-shaped frame 17. In turn, the middle part of the r-shaped telescopic levers of the suspensions 18 is mounted on pins located at one end of the rocking jacks 19 is fixed, and on the other At the end, the swing jacks 19 are fixed to the Robotic frame 17 by means of fingers. Such a suspension of the conveyor side 2 provides a mechanized excavation of coal along the entire height of the lining.

Epicycloid cowling is calculated by the formula

(4r (R + r) sln (Ј-Ј)

Curvature - ------- about g 4- R -------

where R is the radius of the fixed circle;

g is the radius of the moving circle;

t is the angle between the straight line drawn from the center of the fixed circle through the center of the moving circle and the X axis.

The operation of the shield mechanized lining for the extraction of coal is as follows.

In the initial position, the conveyor belt 2 is in the lower position near the soil of the formation, the lining 1 is moved to the bottom, After turning on the engines of the conveyor belt 2 and

pumping station (SNT-32), conveyor line 2 with the help of r-shaped telescopic levers of the suspension 18 is fed to the bottom and produces a notch of coal near the soil of the formation,

then, with the help of rocking jacks 19, it is fed to the top of the bed, and it takes out a hole 3-4 m high to a depth of cut 0.6-0.8 m. Lowering to the bed soil, unloads coal from the passage (ditch) into the flank furnaces or

stingrays. The conveyor is then retracted to its original position.

After supplying fluid to the piston cavity of the hydraulic jack 6, the support skis 4 are moved with the epicycloid fairing 5 fixed to them, and since the lower part of the overlap freely lies on the epicycloid fairing 5, it begins to slide over it. In this case, the upper part 8 of the ceiling pivotally connected to the lower part of the ceiling also starts to move. After moving through the soil of the formation to the excavation step of 0.6 - 0.8 m, the liquid is supplied to the drain cavity of the hydraulic jack 6 to support the lower part 9 of the overlap. Then

5, the roofing bundle of coal 20 is blasted, the blast holes are blasted 21, the roofing bundle of coal 20 is beaten off and the beaten coal is unloaded using a conveyor belt 2 into flank furnaces or slopes.

0 After breaking off the roofing stack of coal 20 sprung with spring jacks 13, the visors 12 automatically block the space between the lining and the untouched mass of coal, eliminating the sinking of collapsed rocks from behind the shield into the bottom hole. Then, by lowering the rod of the hydraulic struts 7, the upper part 8 of the ceiling is lowered. The lining section moves towards the bottom and the visors 12 are raised by chain turn stops 14, deviated towards the worked out space. Thus, when using a shield mechanized roof support, a roofing bundle of coal 20 is destroyed and

5 then release the front end of the lining of the lining in the operating area of the conveyor belt 2 at the same time block the formed gap by lowering the upper part 8 of the overlap of the shield, while protecting

0 bottom hole from bypass of collapsed rocks.

The use of mechanized shield support will allow coal mining on formations with a capacity of up to 7-8 m, increase labor productivity of workers, and reduce coal losses in the bowels.

Claims (1)

SUMMARY OF THE INVENTION Shield mechanized support for mining steep and inclined bed formations, including shield sections with articulated visors, sprung spring jacks, support skis with curved fairings at the obstructed end, connected to the shield sections by means of hydraulic gouges, , in order to increase reliability in the operation of the lining with weakly stable enclosing rocks, the surface of the curved fairings is made in the form of an epicycloid, section shield Vågå overlap made of two parts connected hingedly to each other, and provided with visors chain limiters rotation. 72 / J # 2 1J JB -with zr V l   /// V / FIG. 8