RU2078214C1 - Shield support for steeply dipping seams - Google Patents

Abstract

FIELD: mining industry; applicable in longwall advancing to the dip. SUBSTANCE: shield support for steeply dipping seams has units. Each unit has base, shield roofing made of separate load-bearing beams secured to rigid cross-pieces installed along the strike, props installed between base and shield roofing, advancing rams and sector support on which shield roofing freely rests with its rear part. Each load-carrying beam is connected by additional flexible links with adjacent load-carrying beams located on the side of seam roof. Each beam has two points of fastening of flexible links located on beam sides and spaced over beam length at an interval equalling the value of its advance towards seam roof in its dismantling. Each beam of shield roofing may be made trapezoidal in cross-section with its small base facing the face. EFFECT: higher efficiency. 2 cl, 3 dwg

Description

 The invention relates to the mining industry, and in particular to panel supports for mining coal seams with pillars in the fall.

 Known shield support for testing steeply inclined formations, including separate sections containing a shield, skis, (base) with a volumetric support located at the rear of the base, hydraulic ram jacks and racks installed between the base and the ceiling.

 A disadvantage of the known roof support, which we adopted as a prototype, is the rather high consumption of a wooden knurl on a panel ceiling, high labor input, dismantling of a roof support, and a panel ceiling (wooden knurling), as a rule, cannot be dismantled.

 There is a method of dismantling the shield supports, working with separate movement on the roof and soil during the development of powerful steep inclined formations with pillars in the fall, including the dismantling of hydraulic equipment, supporting elements and metal structures of the shield support, fastening and protecting the bottom hole from collapsed rocks with wooden metal ceilings.

 A disadvantage of the known technology for dismantling the shield support is that it is not intended to dismantle the shield.

 The aim of the invention is to remedy the noted disadvantages of the prototype, which is achieved by the fact that in the panel sectional lining, each section of which consists of a base, panel cover, racks installed between them, hydraulic jacks for moving and sector support, on which the panel covering is freely located with its rear part , which consists of separate load-bearing beams attached to rigid traverses installed by wiping the formation, while the beams are additionally connected to each other by a diagonal flexible connection ; moreover, the beam has two points of attachment of a flexible diagonal connection, located on different lateral sides of it and spaced along the length by the necessary step size of moving the beam towards the formation during dismantling; in addition, each load-bearing beam of the shield slab is made with a trapezoidal cross-sectional shape, with a smaller base facing down (towards the bottom).

 The goal is achieved not only due to design solutions, but also due to the new dismantling technology, including the dismantling of hydraulic equipment, supports and supports (racks) and metal structures, fastening and protecting the bottom hole from collapsed rocks, while fixing the bottom hole when removing the shield the overlap is carried out by backing the load-bearing beams of the shield slab with two rows of mobile arms of the cantilever type, or with spacer racks, and the protection of the bottom-hole space Twa from caving by the dam produce beams dismantled by holding and turning them into flexible diagonal connections.

 In the well-known flexible sectional shield for the development of steep fall coal seams, the individual blocks (beams) are wiped together by means of a pivotally shaped shape. In relation to our conditions, it cannot be applied, since it does not provide the necessary turn of the beams to the line of their dismantling track and it is difficult to separate them.

 In another flexible non-sectional shield, the main load-bearing elements are made of reinforced concrete beams of rectangular section or round, but the longitudinal metal belts do not allow the dismantling of the shield floor.

 A frame-flexible shield is also known, consisting of reinforced concrete frame beams pivotally connected to each other and overlapped by a flexible metal ceiling. The disadvantages in relation to our conditions are the same as in previous designs.

 Significantly differs from the known dismantling technologies, the proposed method of dismantling the shield supports with separate movement of the base and panel cover. So, when dismantling the shield aggregates that work on the dip of the formation, it is proposed to use flexible overlapping to protect the dismantling chamber, in another embodiment, it is proposed to protect the shield support to be dismantled from collapsed rocks with drill rods, for installing (drilling) which in the soil of the formation a drilling drift is held.

 In well-known technological schemes for mounting and dismounting the shield support, ShchRP does not provide for the dismantling of the enclosing part (mainly wooden knurled) of the shield support.

 Figure 1 shows the profile projection of the shield support in the face of a steeply inclined formation; figure 2 is a cross section of a part of the shield overlap with the image of the cross section of the shield beams during dismantling under the lining; figure 3 the position of the dismountable beams during dismantling.

 The shield support for steeply inclined formations includes separate sections, each of which consists of a base 1, a shield overhead 2, racks 3 installed between them, hydraulic jacks for a shifter 4 and a sector support 5, on which a shield overlap 2 is freely located with its rear part. in each section, the lining is made of separate load-bearing beams 6 having a trapezoidal cross-sectional shape, facing down with a smaller base (towards the bottom). Beams 6 in each section of the lining between each other along the strike are connected by rigid traverses 7, equipped with quick disconnect devices. In addition, the beams 6 are additionally interconnected by a diagonal flexible connection. At the same time, each beam has two fastening points of flexible diagonal connection located on different sides and spaced along its length by the necessary step size of moving the beam towards the bed of the formation during dismantling.

 The installation of the shield supports and the cleaning operations for the extraction of coal is carried out in the usual manner as in the well-known shield supports of this type. Coal is mined in the face separately from the soil and the roof of the formation using mechanized or drill-blasting and delivering coal along the face with a conveyor belt or other downhole delivery mechanism. The shield support is also moved separately: first, the bases 1 of all the (sectional) support sections are moved by hydraulic jacks 4, and then the shield ceilings 2 are also sectionally moved. The frontal way of moving several support sections at the same time is not excluded.

 After practicing the shield pillar, they are present for dismantling the shield assembly, having previously preliminarily aligned the support sections in one line, and the panel ceilings 2, located on the coal pillar at the top of the seam. First, excavating and extracting equipment, hydraulics, base 1 and racks 3, rigid traverses 7 are dismantled. Before dismantling the metal traverse 7, the beams 6 of the shield panel 2 in the dismantled section are reinforced with two rows of mobile (preferably hydraulic) pickups. Grips 9 can be rack-mount, or cantilever type with fixing and holding them on the shield 2.

 The beams 6 of the shield overlap are dismantled as follows: grabs 9 are moved to the width of one or two beams, blasting removes the coal pillar from under the roof of the formation and beam 6 (beams) hangs on a flexible diagonal connection 8, while the beam moves slightly forward ( due to the diagonal arrangement of the connection 8) and rotates (figure 3), preventing access of the collapsed rocks from the worked out space (from the obstruction) to the shield support. Collapsed rocks beam front (roofing) part unfolds under the lining. At the same time, 2 3 beams are suspended. Then the beam 6 is attached to the winch rope and is removed from under the dismantled support section. Then proceed to the dismantling of the next part of the shield slab with the same sequence of operations described above.

 The application of the proposed design of the shield support and dismantling technology will significantly reduce the cost of shield support, which will expand the scope of their effective application.

Claims (2)

 1. Shield support for steeply inclined formations, including separate sections, each of which consists of a base, a shield overlap made of separate support beams attached to rigid traverses installed along the strike of the formation, racks installed between the base and the shield overlap, hydraulic rams and sector support, on which a shield overlap is freely located with its rear part, characterized in that each supporting beam of the lining section is connected by additional flexible connections with adjacent conductive beams disposed with the reservoir side of the roof, wherein each beam has two points of attachment of flexible links located on different sides of the beam, and spaced along the length of the beam by the amount of its displacement step towards formation of the roof in its removal.  2. The support according to claim 1, characterized in that each beam of the shield overlap is made with a trapezoidal cross-sectional shape facing a smaller base towards the bottom.

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