Reinforced bar joisted for top board
A technology of joists and steel bars is applied in the field of structural improvement of the fixed roof part, which can solve the problems of raising the production cost of coal enterprises, the distribution of anchoring positions is scattered, and the control effect of the roof is poor. Effect
Inactive Publication Date: 2008-05-21
SHANXI YITANG COAL IND
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Problems solved by technology
[0002] Nowadays, the fixed product W-shaped steel belt of the manufacturer is usually used to fix the roof of the underground working face of the coal mine, which can meet the requirements of roof fixing, but it is expensive, and the production cost of the coal enterprise will be raised due to the large number of uses; at the same time, because the W-shaped steel belt itself Due to the limitation of the size and position of the anchorage position, the distribution of anchorage positions is relatively scattered, and the control effect on the roof is poor.
In production practice, the price and performance of the existing W-shaped steel belt are difficult to meet the requirements of reducing production costs and improving the safety of roof control according to coal mines.
Method used
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[0015] The present invention will be further described below in conjunction with the drawings and embodiments.
[0016] The first embodiment is a reinforced joist for roof support of the mine roof. Its single body weighs about 12kg and is used to reinforce the roof of the tunnel working face and the sidewall of the tunnel, as shown in Figures 1 and 2.
[0017] In this example, the frame 1 is formed by bending steel bars with a diameter of 12 mm to form a closed elongated frame 1 with a semicircular shape at both ends, and the two long sides are parallel and opposed, and the distance is equivalent to the size of the supporting plate 3 with anchor rods. The box 2 is made of two steel bars of the same diameter with the same length as the width of the frame, at the same distance as the width of the frame, vertical to the long side of the frame, and fixedly connected to the frame. Along the length of the frame, maintaining a spacing of 80cm, a total of six boxes are made to form the ba...
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A roof reinforced steel beam pertains to the mining support parts. In order to increase the intensity and decrease the cost, the beam is composed of a square frame (1) with the same size with an anchor splint (3), which are connected by a rod, as well as a closed rectangular frame (2) fixed with the square frame, with the same width of the square frame and linked by the rod; the beam is used as the cushion of the anchor splint. The frame length can effectively transfer the anchoring force born by the square frame to the corresponding length of the anchored body. The splint simplifies the structure of the anchor splint cushion, enhances the rigidity and reduces the weight and the cost. The proposal of different combinations that a plurality of square frames are linked with different rectangular frames and locally intercrossed and overlapped with the cushions gradually strengthens the capacity of bearing and transferring the anchoring force and optimizes the cushion structure. The present invention has the advantages of flexible operation, convenient storage and portage and less occupied area. The manufacturing cost of the product is only 40 percents of the price of the similar W-type steel bars and the weight is only a half; in addition, the installation is convenient and suitable for the surface shape of the splint.
Description
Technical field [0001] The invention belongs to a mine support component, and mainly relates to the structural improvement of the fixed roof part of the support component. Background technique [0002] Nowadays, W-shaped steel belts are usually used to fix the roofs of underground working faces of coal mines, which can meet the requirements of roof fixing, but its cost is expensive. Due to the large number of use, the production costs of coal enterprises are raised; at the same time, the W-shaped steel belts themselves The size and position restrictions of the anchors make the distribution of anchoring positions more scattered, and the effect of controlling the top plate is poor. In production practice, the price and performance of the existing W-shaped steel belts are difficult to meet the requirements of reducing production costs and improving roof control safety according to coal mines. Summary of the invention [0003] The purpose of the present invention is to provide a rei...
Claims
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Inventor 孙全林
Owner SHANXI YITANG COAL IND