Abstract
This paper mainly designs a device for improving setting load of hydraulic support. The device could enhance the pressure of bottom cavity of the stand column in hydraulic support, decrease the late bearing time of stand column of hydraulic support, shore the roof of coal face effectively, prevent the roof fall caused by separating the roof of wall rock untimely from the layer, and ensure the safety production in the coal facing, with the circumstance that the structure of liquid valve bank of hydraulic support isn’t changed and that it has no influence on the normal working of liquid-inlet and rising support. The device using the techniques of hydraumatic and machinery, of which the structure is simple, safe and reliable, is convenient for the work at the underground coal mine. Through the simulated analysis for hydraulic circuit of hydraulic support and the field test, the hydraulic system of hydraulic support is stability with no larger vibration and has a better effect on pressurizing, after using the device. So, the automatic pressure control device to setting load has good popularization and application value.
Highlights
Hydraulic support plays a vital role on the safety production for coal mine, and is the key equipment for realizing high yield and high efficiency in the coal face
To decrease the roof fall accident caused by that the roof of coal face is separated from layer untimely to break the integrality, and to ensure the safety of coalmine production, it’s very significant to design the pressure control system for increasing setting load [1]
This device is placed between commutation control valve and stand column of hydraulic support, and is able to ensure the setting load of hydraulic support to achieve the setting value required in the case that the structure of reversing valve isn’t changed and the normal work for raising hydraulic support isn’t influenced
Summary
Hydraulic support plays a vital role on the safety production for coal mine, and is the key equipment for realizing high yield and high efficiency in the coal face. The function of hydraulic support in the coal face is that to support and control the roof of coal mine effectively and to ensure safety work space for worker operation and machine running. Hydraulic support couldn’t shore the roof effectively, and the potential safety hazard is brought in the coal face. To decrease the roof fall accident caused by that the roof of coal face is separated from layer untimely to break the integrality, and to ensure the safety of coalmine production, it’s very significant to design the pressure control system for increasing setting load [1]
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