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Electric hydraulic controlled caving coal method and it hydraulic supporter

A technology of electro-hydraulic control and hydraulic support, which is applied in the direction of mine roof supports, pillars/supports, earthwork drilling and mining, etc. It can solve problems that affect the stability of support supports, cannot adjust the size of the coal discharge port, and cannot be well adapted. To achieve the effect of improving the control effect of coal discharge, adapting to the roof environment and avoiding the forward tilt of the support

Active Publication Date: 2010-03-10
兖矿能源集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is: the sensor of the jack of the top coal caving hydraulic support adopts a proximity switch, which can only detect the expansion and contraction of the plug board, but cannot detect and control the extension length of the plug board, that is, the size of the coal discharge port cannot be adjusted, so that it cannot be easily adjusted. It is well adapted to the requirements of different coal seams for the top-coal caving process; there is a problem of the roof beam leaning forward during the coal caving process, and the roof beam has no tilt sensor, which cannot ensure the horizontal state of the support top beam, which affects the stability of the support support

Method used

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  • Electric hydraulic controlled caving coal method and it hydraulic supporter
  • Electric hydraulic controlled caving coal method and it hydraulic supporter
  • Electric hydraulic controlled caving coal method and it hydraulic supporter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: In figure 1 , 2 It shows that the bracket of the present invention is composed of a bracket body and an electro-hydraulic control system.

[0035] The support body is a two-column cover-type low-level coal caving hydraulic support, which consists of a top beam, a column, a base, a cover beam, a balance jack, a front connecting stalk, a rear connecting stalk, a side guard and a side guard jack, a side guard and a side guard. Guard plate pushing jack, front conveyor pushing jack, rear conveyor pulling jack, base lifting jack, and tail beam of coal discharge mechanism, tail beam jack, inserting plate and inserting plate jack, etc.

[0036] A tilt sensor 1 is installed on the top beam of the bracket and in front of the column, a pressure sensor 2 is installed on the valve plate of the hydraulic cylinder lower chamber of the column, an electro-hydraulic valve group 6 is installed on the operating frame of the base, and the bracket controller 3 is installed on the...

Embodiment 2

[0051] Example 2: image 3 Another form of the hydraulic support of the present invention is shown: an electro-hydraulic control four-column support shield type low-position top coal caving hydraulic support. It has four uprights, which are divided into two rows, the front and the back, without a balance jack. The pressure sensors are divided into front and rear column pressure sensors 2 and 8, which are installed on the valve plates of the front and rear column lower chambers respectively. The expansion and contraction of the front and rear columns of the bracket are respectively controlled by the two main control valves of the sixth unit and the two main control valves of the fourth unit of the electro-hydraulic valve group 6. The signal input end of the support controller 3 receives the signal of the roof beam inclination sensor 1, and the output socket F2 of the support controller 3 controls the expansion and contraction of the front and rear columns through the solenoid ...

Embodiment 3

[0054] Embodiment 3: The electro-hydraulic control top-coal caving method of the present invention includes the following five parts:

[0055] 1. Use electro-hydraulic control of the top-coal caving hydraulic support, or install an electro-hydraulic control system on the low-position top-coal caving hydraulic support. The requirements of electro-hydraulic control caving hydraulic support and electro-hydraulic control system are as described in Example 1 and 2.

[0056] 2. Connect the bracket controllers 3 of all the brackets on the working face with the trunk cable 20 in order or through the isolation coupler 15 to interconnect them into a network, and configure the necessary system accessories for connection at the same time, so that Figure 5 The unit system with the bracket controller 3 as the core in each bracket shown is combined into a complete set of electro-hydraulic control system for the whole working face. exist Image 6The configuration and connection of electro-...

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Abstract

The invention relates to coal mine synthesizing exploiting caving top coal technique. Electro-hydraulic control caving top coal method is adopted hydraulic support to finish support caving top coal each procedure. The hydraulic support is made up of low order caving top coal hydraulic support and electro-hydraulic control system. In the electro-hydraulic control system, top beam incline sensor isadded. The flash board jack is adopted travel sensor. The length of the flash board is increased, and the size of the coal discharging is adjusted in order to keep top beam horizontal and increase supporting stability. The coal discharging method includes the following steps: top coal sufficient crashing: adopting single sequence sublevel discharging; top coal middling crashing: adopting the same;top coal difficult crashing: adopting double sequence sublevel discharging. The invention can increase coal discharging control type, improve caving top coal technique adaptability, and realize highyield and high efficiency.

Description

Technical field [0001] The invention relates to a fully-mechanized mining top-coal caving process and its supporting equipment, in particular to an electro-hydraulic control top-coal caving method and its hydraulic support suitable for fully-mechanized low-position top-coal caving working faces. Background technique [0002] The 17th volume of China's "Utility Model Patent Bulletin", No. 8 discloses the patent that the name is "automatically controlled top-coal caving support", its patent number: ZL 00213572.8, publication number: CN 2420422Y. Its purpose is to provide an automatic control low-level coal caving hydraulic support that realizes electro-hydraulic program control; its composition is: an electro-hydraulic program control system is installed on the top-coal caving hydraulic support, a pressure sensor is installed on the column, a tail beam jack, The displacement jack is installed with a displacement sensor, and the plug-in jack is installed with a proximity switch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D23/16E21D15/48
Inventor 杨德玉金太来存良李佃平李正龙孟祥军韩纪志谢强珍刑士军张善波吕迎春
Owner 兖矿能源集团股份有限公司
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