Hydraulic bracket for top coal discharging in low position
A technology of hydraulic support and top coal caving, which is applied in mine roof support, mining equipment, earthwork drilling and mining, etc. It can solve the problems of low resource recovery rate and large gangue content, achieve sufficient crushing, easy release, and prevent caving The effect of leaking large pieces of gangue back
Active Publication Date: 2014-03-12
兖矿能源集团股份有限公司
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Problems solved by technology
However, top-coal caving mining has the disadvantages of low resource recovery rate and large gangue content.
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[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0013] exist figure 1 , 2 The overall structure of a low-level top coal caving hydraulic support of the present invention is shown in Fig. The low-level top coal caving hydraulic support is also known as the double tail beam top coal caving hydraulic support; it consists of a top beam 1, a column, a base box, a cover beam 2, a four-bar linkage mechanism, a guard plate, a telescopic beam, a push jack, and a tail beam. It is composed of a coal drawing mechanism formed with a plug board. The coal caving mechanism of the top coal caving bracket is a double tail beam coal caving mechanism; the coal caving mechanism is composed of two independent tail beams, a left tail beam 3 and a right tail beam 4 . The left tail beam 3, the left tail beam jack, the left insert plate 5 and the left insert plate jack constitute the left tail beam coal discharging mechanism...
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A hydraulic bracket for top coal discharging in a low position is also known as a double-tail-beam hydraulic bracket for top coal discharging, and mainly consists of a top beam I, a stand column, a base box, a four-connecting-rod mechanism, and a coal discharging mechanism which is formed by tail beams and inserting plates. The coal discharging mechanism adopts the two tail beams, and comprises the two independent tail beams, namely a left tail beam 3 and a right tail beam 4. A left tail beam coal discharging mechanism is formed by the left tail beam 3, a left tail beam lifting jack, a left inserting plate 5 and a left inserting plate lifting jack; a right tail beam coal discharging mechanism is formed by a right tail beam 4, a right tail beam lifting jack, a right inserting plate 6 and a right inserting plate lifting jack; and the left tail beam lifting jack, the left inserting plate lifting jack, the right tail beam lifting jack and the right inserting plate lifting jack are respectively controlled by an independent hydraulic loop. The bracket for top coal discharging is used on a fully-mechanized caving mining surface, and due to the control of the double-tail-beam coal discharging mechanism, the width of a coal discharging hole can be reduced by a half, and the tail beams can swing more easily, so that the top coal can be smashed and caved sufficiently, and the recovery rate of resources can be improved; and the top gangue discharging amount can be controlled better, and large-size gangue can be prevented from caving. The hydraulic bracket for top coal discharging in a low position creates conditions for increasing the width of the bracket and reducing the number of the brackets on the full-mechanized caving mining surface.
Description
technical field [0001] The invention relates to a top coal caving hydraulic support for fully mechanized mining in coal mines, in particular to a low-level top coal caving hydraulic support which can reduce the width of a coal caving port by half, improve the top coal caving control effect and control the discharge amount of top gangue. Background technique [0002] Top coal caving mining has the advantages of high yield, high efficiency and low consumption. At present, top coal caving technology has been widely used in the mining of thick coal seams. However, top coal caving mining has shortcomings such as low resource recovery rate and large gangue content. Improving the recovery rate of coal resources and controlling the discharge amount of top gangue is an important topic in the current fully mechanized top coal mining technology. SUMMARY OF THE INVENTION [0003] In order to overcome the shortcomings of low resource recovery rate and large gangue content in mining wi...
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IPC IPC(8): E21D23/04E21D23/16
Inventor刘健李小平李洪先亓玉浩曹怀轩李国锋
Owner兖矿能源集团股份有限公司