PL159133B1 - Mine lining of high supporting factor - Google Patents

Abstract

Lemniscate mine lining providing a high degree of support, having a roof-bar supported by at least one hydraulic prop and connected by an articulated joint to a roof-fall shield, which is also connected by an articulated joint to front and rear lemniscate connectors, these connectors being deflectably mounted in the foot-piece, while the roof-fall shield is pushed away from the roof-bar by a roof-bar servomotor, characterized in that that the roof-fall shield (2) has an inclination (12) in its upper part, while the articulated joint (13) connecting the roof-fall shield (2) to the roof-bar (9) is transposed relative to an axis joining the centres of the articulated joints (7, 8) by a distance G>0, where the lining structure respects the following ratios: the ratio of the length (L2) of the front connector (3) to the length (L1) of the rear connector (4) is 1.21-1.25, the ratio of the distance (L3) of the articulated joints (7) and (8) to the active length (L4) of the roof-fall shield (2) is 0.20-0.25, the ratio of the vertical component (B) of the distance of the articulated joints (5) and (6) to the horizontal component (A) of that distance is 0.40-0.43, the ratio of the working range of the lining (δH) to the minimum working height (Hmin) is 0.80-1.00, and the ratios of the total height (B+C) of articulated joint (5) above the floor (14) to the minimum height (Hmin) and maximum height (Hmax) are respectively 0.40-0.50 and 0.22-0.24.<IMAGE>

Description

The subject of the invention is a mining lemniscate support with high resistance, used especially in the mining of minerals in a cave mining system.

It is known from the Polish patent description No. 126 385 entitled Lemniscate mining support, mining support structure. The known casing comprises a floor runner connected to the cave cover by means of lemniscate system connectors and a canopy connected to the cave cover articulated. The roof beam is supported by at least one stand connected detachably to the floor runner and rests in the socket. Between the shield and the canopy, the casing has a roof actuator that corrects the mutual position of these two structural units. The casing is stable without the introduction of additional cylinders, and the resultant support reaction is approximately in the center of the floor runner.

The known lemniscate housing is constructed so that the length dimensions of its elements meet the desired proportions within the following ranges: the ratio of the length of the front lemniscate link to the length of the rear lemniscate link is 1.0-1.1;

the ratio of the distance between the axes of the upper joints of the links with the cave cover to the length of the front lemniscate joint is 0.35 - 0.40, the ratio of the vertical component to the horizontal component of the distance between the axes of the lower joints of the links with the bottom floor is 0.55 - 0.60, while the proportion of length the front lemniscate link to the length of the active cave shield is 0.48 - 0.52.

The inventive housing No. 126,385 also has distinctive proportions in relation to the working height range. The proportion of the active length of the casing cover to the minimum height of the casing work is 1.50 - 1.70, and the proportion of the distance between the two extreme positions of the canopy to the minimum height of the casing is 1.20 - 1.40.

The disadvantage of the known solution is the relatively low support, especially in the lower operating range, in which the hydraulic props and the caving cover are significantly inclined, and high rock mass pressures lead to deformation of the cover near the joint connecting the cover with the canopy.

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The object of the invention is to overcome these drawbacks and to construct a lemniscate casing which has a cave cover and sub-assemblies of the lemniscate system capable of carrying significant loads throughout the entire operating range of the casing.

This goal was achieved by constructing a high-strength mining lemniscate casing, whose upper part of the cave casing has a slope, and the joint connecting the cave cover with the canopy is shifted with respect to the axis connecting the centers of the articulated joints, in which the lemniscate couplings are connected with the cave casing by a distance G> 0. The construction of the casing meets the following proportions: the proportion of the length of the front lemniscate connector to the length of the rear connector is 1.21 - 1.25, the proportion of the distance of the joints in which the connectors are connected with the cave cover to the active length of the cave cover is 0.20 - 0 , 25 - proportion of the vertical component of the distance between the joints in which the lemniscate connectors are connected with the floor runner to the horizontal component of this distance is 0.40-0.43. At the same time, the proportion of the operating range of the housing to the minimum operating height is 0.80 - 1.00, and the proportions of the total height of the joint, in which the front lemniscate connector is connected with the floor, above the floor - to the minimum height and maximum operating height of the housing, are respectively: 0, 40 - 0.50 and 0.22 - 0.24.

The distance G is preferably in the range 50 to 1000 mm. The subject matter of the invention in an exemplary embodiment is illustrated in the drawing which shows sections of high-strength lemniscate mining support in a side view. Mining lemniscate support with high bearing capacity has a bottom bar 1 with which the front link 3 and rear link 4 are articulated, and then a cave cover 2 articulated with the canopy 9 by a joint 13. The roof bar 9 is supported by a hydraulic stand 10, placed in the bottom link 1. In addition, the canopy 9 is supported in view of the caving cover 2 by a canopy actuator 11. In its mining part, the canopy 2 has an inclination 12. The axis of the joint 13, which connects the canopy 2 with the canopy 9, is shifted with respect to the axis connecting the joints 7 and 8 of the front 3 and the rear 4 lemniscate linkages of size G. The upper joints 7 and 8 of the links: front 3 (length L2) and rear 4 (length L1) are spaced by size L3. The distance of the lower joints 5 and 6 is A, while the height above the floor 14 of joint 6 is C and of joint 5 is (B + C). The operating range of the housing according to the invention is ΔH = Hmax - Hmin.

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Hmin

Department of Publishing of the UP RP. Circulation of 90 copies

Price: PLN 10,000

Claims (2)

Patent claims 1. High-strength mining lemniscate support having canopies supported by at least one hydraulic stand, articulated with a caving cover, which cover is also articulated with the front and rear lemniscate link, while the links are pivotally mounted in the floor runner, while it is stretched with respect to the canopy by means of a canopy actuator, characterized in that its cave cover (2) has an inclination (12) in its upper part, and the joint (13) connecting with the canopy (2) with the canopy (9) is shifted with respect to the axis connecting the centers of the joints (7, 8) with a distance G> 0, and the housing structure meets the following proportions: the proportion of the length (L2) of the front link (3) to the length (Ll) of the rear link (4) is 1.21 - 1.25, the proportion of the distance (L3) of the joints (7) and (8) to the active length (L4) of the cuff (2) is 0.20 - 0.25, the ratio of the vertical component (B) of the distance between the joints (5) and (6) to the horizontal component my (A) of this distance is 0.40 - 0.43, the proportion of the housing operation range (a η) to the minimum operating height (Hmin) is 0.80 - 1.00, while the proportion of the total height (B + C) of the joint ( 5) above the floor (14) to the minimum height (Hmin) and maximum height (Hmax) are 0.40 - 0.50 and 0.22 - 0.24, respectively. 2. Mining casing according to claim The method of claim 1, characterized in that the distance G is preferably in the range 50 to 100 mm. * * *