SU1332030A1 - Power support unit of front-loading machinery set - Google Patents

Description

ten

This invention relates to the development of minerals by underground methods. bombs with the help of mechanized roof supports and can be used for refraining. development of sloping and steep seams.

The aim of the invention is to increase the reliability of the support section by eliminating the compaction of the rock with a guard during the movement.

Fig. 1 shows a mechanized support section, side view; Fig. 2 shows a kinematic scheme for moving the bulkhead at the minimum height of the support.

The mechanized lining section consists of a two-section bulk barrier containing convexes in the direction of the dam upper 1 and lower 2 fences, base 3 with a telescopic wall 4, upper 5, hydraulic posts 6 with a support 7, hydraulic jacks of the upper 8 and lower 9. Top 1 and below 2, the barriers are hingedly connected to each other, while the lower fencing-25 A is hingedly connected to the base 3 ,. and the upper fence with the top 5. The base 3 in the middle part has a window in which the support 7 hydro15 is located

20

and the lower 2 fences when moving away from the collapse of rocks. If this condition is fulfilled for the minimum size of the support at the height, then there is no compaction of the collapsed rocks in the entire range of the power to be withdrawn by the dam side when moving the support and base.

When advancing the base 3, the top fence is rotated around a point. In the center of the hinged connection of the top fence with the top, and the bottom fence 2 makes a complex movement: point B, which is the center of the hinged connection of the upper and lower barriers, moves along an arc a radius equal to the length of the segment EB and moves to point B, and point A, which is the center of the hinged connection of the lower fence 2 with base 3, moves along a straight parallel to the soil of the reservoir and comes to point A, which is behind the point izhki.

If the angle between the segments AB and BV (the original position of the lining) is less

90

then the bottom profile

must be curved from the top of the column 6. Bas-for on the front and rear side toward the dam. The seal obpo has holes 10 and 11 for connection with similar bases of adjacent sections. Top hydraulic jack

8 feeder connects the upper fence with a sliding part 12 of the telescopic wall 4, the lower hydraulic jack

9- base 3 s. Support 7.

In the initial position, the support of the hydraulics 6 is unstressed and, together with the top 5 and the support 7, is pushed forward. In this case, the upper jack 8 is in the fully shifted position, and the lower 9 is in the moved apart state. When pressure is applied to the rod end of the lower 9 and the piston cavity of the upper 8 supply jacks, the base 3 is pushed up along the entire bottom. After the completion of the cycle, the support sections are mounted on the coal excavation, which may be effected, for example, by an annular jet actuator. To this end, the pressure is relieved partially or completely from the hydraulic column 6 and the hydraulic jacks 8 and 9. The hydraulic column 6 is moved with the support 7 and the top 5.

To smoothly move the stand 6 with the top 5 and extend the base -3, it is necessary that all points of the outer contour line of the top 1

„

0

25 A

15

0

and the lower 2 fences when moving away from the collapse of rocks. If this condition is fulfilled for the minimum size of the support at the height, then there is no compaction of the collapsed rocks in the entire range of the power to be withdrawn by the dam side when moving the support and base.

When advancing the base 3, the top fence is rotated around a point. In the center of the hinged connection of the top fence with the top, and the bottom fence 2 makes a complex movement: point B, which is the center of the hinged connection of the upper and lower barriers, moves along an arc radius equal to the length of the segment EB and moves to point B, and point A, which is the center of the hinged connection of the lower fence 2 with the base 3, moves along a straight, parallel to the soil of the seam and

Dit to point A, which is lagging behind the point by the step of the movement.

If the angle between the segments AB and BV (the original position of the lining) is less

BUT

90

then the bottom profile

five

there are no broken rocks when the base is advanced, if point A is no closer to the bottom than point D of the intersection of a circle with center at point B and radius,. equal to the length of the segment BV, or, which is the same, point A is on the outer side of this circle, and also if the DB arc is on the inner Q side / BA arc, concentric with the bottom fence profile, and does not intersect it, and Arc A. , B does not intersect the segment straight .AA, except at point A. Therefore, Cree radius

45

50

55

The lengths of the lower fence should be no more than the length of the segment OB and not less than the length of the segment, where 0., is the point of intersection of the perpendicular to the segment of AB, drawn from its midpoint (point E), and the straight line passing through points B and B, and 0 is the point of intersection of the perpendicular with the perpendicular to the segment AA, drawn from point A.

The center of curvature of the lower limit of the set should be between the points 0. and 0,.

When moving the rack b with the top 5 and support 7) after the advance

the base 3, the lower fence 2 turns around point A, and the upper fence 1 makes a complex movement. Point B, moving along an arc with a radius equal to the length of section A, B, comes to point B, and point B, which is the center of the hinged joint of the top fence with the top, moves along a straight, parallel roof of the seam, and comes to point B spaced from point in by shifting step. If the angle between the segments and B C is less than 90, the profile of the top fence should be curved with a bulge in the direction of the dam. Compaction of the collapsed rocks upper ogviniipi

Order 37S1 / 30

There is no accident if the arc B.B is inside arc BB and does not intersect the latter, and also if the arc does not intersect a segment of a direct explosive, except at point B. Consequently, the radius of curvature of the top fence profile should be no more than segment and not less than the length of the segment, where 0 is the point of intersection of the perpendicular drawn from the midpoint of segment B, C (point D) c

continuation of the segment,

but

the point of intersection of the perpendicular OjF with the perpendicular rum, to the formation soil from point B ,. /

Fi1.g

Circulation 454

Production.-polygraph, pre-e, Uzhgorod, st. Project, 4

Claims (1)

FRONT UNIT STRUCTURE SECTION, including a base, the telescopic wall of which is pivotally connected by the upper feed jack with the upper fence convex to the side of the obstruction, the upper pivotally mounted on the upper fence and connected by the hydrostand to the support, the lower convex to the side of which is blocked by the upper enclosure fencing and base, and bottom. a supply hydraulic jack pivotally mounted on the base and support., characterized in that, in order to increase the reliability of its operation by eliminating rock compaction by the fence during movement, the center of curvature of the lower fence with a minimum reservoir thickness and the upper shaft extended, is located between the intersection point of the perpendicular drawn from the middle of a straight line segment connecting the centers of the lower fence hinges with a straight line passing through the centers of the upper fence hinges and the intersection point of the above of the perpendicular and the perpendicular to the support vosstavlennym from the center of articulation of the lower guard with the database launched at the step of advancing, and the center of The curves. ® visas of the upper fence with the base extended, is between the point of intersection of the straight line passing through the centers of the opposite hinges of the lower fence, with the perpendicular drawn from the middle of the segment connecting the centers of the hinges of the upper fence, and the intersection of the last perpendicular with the perpendicular to the support drawn from the center of the articulation of the upper fence with the upper, extended one step of movement. SU, „, 1332030> ¹ 1332030