PL149563B1 - Lemniscate-type mine lining - Google Patents

Description

POLAND REPUBLIC FOLK PATENT DESCRIPTION 149 563 Additional patent to patent no. READING ROOM Reported: 85 12 16 / ?. 256859 / Office of Rętattow + go Ni *** »track M *. , τ Ιη «μ | in Priority Int. Cl. ⁴ E21D 23/04 OFFICE PATENT PRL Application announced: 87 09 21 Patent description published: 1990 06 30

Creators of the invention: Czesław Ciunura, Jan Domiczek, Kroi Biernacki, Jerzy Czaja,

Lucjan Kuszecki, Janusz K ^ wan ^ if ^ e ^ wlcl., Janusz Pluta,

Anzelm Gścimiński, Andrzej Sniegowski, Piotr Tenerowicz

The holder of the patent: Fabryka Maszyn Wiertniczych i Górniczych Glinik, Golice / Poland /

MOUNTAIN LEMNISKITE HOUSING

The subject of the invention is a lemniscate mining support, used in longwall mining systems.

The lemniscate mining support, known from the Polish patent specification No. 126 585, comprises a bottom runner connected by lemniscate system connectors and a cave guard to the canopy supported by hydraulic supports placed in the bottom ridge and a canopy support connected to a cave guard. The canopy points in its working range in ^ bones are located on the curves that are parts of Beemoulli's Lemniscate, deviating with the increase of the tear height from the face of the wall towards the collapse, so that in the case of the front edge of the canopy, the inequality ^X 1 < ^{* X} 2 <<C ^X n where Xi is below X ₂ etc.

In this housing, the ratio of the front link length to the rear link length is 1.0 + 1.1, the ratio of the distance between the axes of the connections of the front and rear link with the casing to the length of the front link is 0.35-0.40, the ratio of the vertical axis distance connections of the front and rear connector with the bottom casing to their horizontal distance is 0.55-0.60, the ratio of the front connector length to the distance between the axis of the canopy connection with the cave cover and the axis of the rear connector connection with the cave cover is 0.48-0.52 with cave cover, and the axis of connection of the rear connector with cave cover, up to the minimum height of the casing expansion is 1.50-1.70, the ratio of the difference between the maximum and minimum spreading distance dp of the minimum canopy expansion height 1.20-1.40 .

The disadvantage of this support, due to the wide range of proportions in ^m and a, ^and lengths, is that in many cases there is a significant change in its kinematic and sub-sublimation characteristics, stability and load structure of its elements.

The purpose of the bed is to cool down the inconveniences.

149 563

149 563

The essence of the lemniscate mining support, including the floor runner connected through the lemniscate system connectors and the cave cover with the canopy supported by hydraulic supports placed in the floor run, and the canopy support connected with the cave cover, is that the canopy points in the working range of the support height are located on the section close to the point, Brnoulli so that as the casing expansion increases, these points do not change the distance from the abrasive face or change them with a slight deviation from the face face towards the collapse, in accordance with the slight unevenness

X, ^ 2 $ * '* X where Xj - the abscissa of the lemniscate point located below the abscissa point Xg, where the distance a of the axis of the connections in the plane perpendicular j to the floor stand to the distance b of the axis in the parallel plane is a: b « 0.375 * 0.385; the distance a to the length lj of the front linkage forms the proportion a: 1j 0,1 0.160 * 0.165; distance a to length lg of the back link is a: lg "0.194 * 0.199; the distance a to the distance c between the axes of connections of the cuff with the canopy and the tyliyrm connector has the proportion a and c «0.127 * 0.132; the ratio of the distance a to the distance d between the axes of connections of the roof cover with the canopy and the front connector in the axis a: d 0.153 * 0.157; the ratio of the distance a to the distance e between the axes of the front and rear connector in the cave cover in ^ axis a: e »0.740 * 0.760 and the play in the joint connecting the canopy with the cave cover is' 0 <1 _C 0.021 a, while the clearances in the remaining joints are 0 </ 1 ^ = 1 ^ = 1 ^ "lj" / <0.016a. It is preferable to dig in the casing, the length aspect ratio of which is a: b = 0.3818; as 1-, »0.1628; a: «» 0.1962; a: c - 0.1288; a: d - 0.1555.

The advantage of the lemn and skat mining supports, according to the recommendation, is the preservation of its longitudinal stability, in the event of an even distribution of unit pressures on the floor in the whole range of its working heights, good hoses, the condition of the load bearing capacity of the hydraulic supports, favorable load structure of its individual elements , the behavior of the existing structure within the rock stropowch girder by vertical or nearly vertical movement by sliding the shield canopy and rozsuwaniu hydraulic supports and practically insensitive to the tępujące ^are clearances in the connections of its elements.

The lemniscate mining support according to the invention is schematically shown in the example embodiment in the drawing, in a side view. The object in the Lazek includes a floor 1 connected by lemniscate system connectors, front 2 and rear 3 and a caving cover 4 with a canopy 5 supported by hydraulic supports 6 placed in the floor 1 and a support 7 of the canopy 5 connected with a caving cover 4. Canopy points 5 in the working compartment in the height of the supports, they are located on a section close to the fragment of the Sernoulli lemniscate, so that with the increase of the spreading of the supports, these points do not change the distance from the face of the wall or change it with a slight deviation from the face of the wall in relation to the angle, in accordance with the slight unevenness

X < ^X 2 ^X n where Xj - abscissa of the lemniscate point located below the abscissa of X?

In the operating conditions of the lemniscate mining support, according to the experiment, the stim support is one of the sections of the longwall set and is propped up in the immediate vicinity of the face of the longwall face. In the case of not very compact roof rocks, the support, thanks to the very good characteristics of the support system in the whole range of the strut length, protects the longwall cavity well against the fall of the roof rocks.

In the case of floor rocks with low permissible unit pressures, the casing is characterized by its ease of sliding against the face of the face.

149 563

Claims (2)

Patent claims 1.Lemniscate mining support, including the floor runner connected through the lemniscate system connectors and the caving cover with the canopy supported by hydraulic supports placed in the floor run, and the canopy support connected to the awning cover, characterized in that the points of the canopy / 5 / in the working range of the height of the casing are at a section closer to the fragment of Bernoulli's lemniscate, so that as the height of the casing increases, these points do not change the distance from the face of the wall or change them with a slight deviation from the face of the wall towards the infarction in accordance with the weak inequality ^X 1 < ^Σ 2 · · <* n where Χ- - the abscissa of the lemniscate point located below the x ₂ abscissa point, and the length dimensions are determined by the following relations: distance / a / of the axis of connections in the plane perpendicular to the floor / 1 / to the distance / b / axis in the equidistant plane is / a /: / b / &lt; 0.375 * 0.385; the distance / a / to the length / lj / of the / 2 / front hyphen creates the ratio / a /: / 1 ^ / 0.160 * 0.165; distance / a / to distance / 1 ₂ / link / 3 / tyciego is / a /: / 12 / «0.194 * 0.199; the distance / a / to the distance / c / between the axes of connections of the casing / 4 / from the cave with the roof / 5 / and the connector / 3 / tynyrm has the ratio / a /: / c / «0.127 * * 0.132; the ratio of the distance / a / to the distance / d / between the axes of the connections of the cover / 4 / from the canopy / 5 / and the link / 2 / to the front is / a /: / d / »0.153 * 0.157; the ratio of the distance / a / to the distance / e / between the axes of the / 2 / front and / 3 / rear coupler in the / 4 / nave cover is / a /: / e / «0.740 * 0.760, and the play in the joint connecting the canopy / 5 / sheath / 4 / ^ odzaw words claims 0 <l ^ _c 0.021, while slack in the other joints are ^{0 K} / ^ 1 "* ^{e 1.3} 1" / ^ 0.016. 2. The housing according to claim 1 A method according to claim 1, characterized in that the length proportions are: / a /: / b / »0.3818; / a /: / 3 ^ -j / 0.1628; / a / / 12 / 0.1962; / a /: / c / «0.1288 i / a /: / d /» 0.1555.