Large-dip-angle upward-mining-surface hydraulic support trend stability method
A hydraulic support and stability technology, applied in mine roof support, mining equipment, earth-moving drilling and other directions, can solve problems such as affecting mine safety production, hydraulic support dumping, and large calculation results.
Inactive Publication Date: 2015-04-29
CHINA UNIV OF MINING & TECH
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Problems solved by technology
[0003]The existing hydraulic support stability analysis method does not consider the influence of the inclination angle of the working face on the stability of the hydraulic support when the working face is mined with a large inclination angle, resulting in large calculation results , as a result, effective measures were not taken in time in the actual production, resulting in the tilting of the hydraulic support during upward mining, which seriously affected the safe production of the mine
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Embodiment 1
[0055] Embodiment 1: The method for the stability of the hydraulic support is carried out according to the following steps:
[0056] (1) Based on a single hydraulic support, analyze the factors that affect the stability of the hydraulic support;
[0057]Based on a single hydraulic support, regardless of the impact of the working face conveyor, shearer and adjacent frames on the stability of the hydraulic support, the factors affecting the stability of the hydraulic support include: the inclination angle and direction angle of the working face, the center of gravity of the hydraulic support Position, gravity, length parameters of top beam, front beam and base, working resistance of hydraulic support, force of top plate on support, support force of bottom plate on support, friction between top and bottom plate and support;
[0058] (2) Establish the mechanical model of hydraulic support in the free state to upward mining and dumping, and obtain the calculation formula of the hyd...
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The invention discloses a large-dip-angle upward-mining-surface hydraulic support trend stability method, and belongs to a fully-mechanized coal mining surface hydraulic support stability method. The large-dip-angle upward-mining-surface hydraulic support trend stability method comprises the following steps: (1) based on a signal hydraulic support, the factors affecting stability are analyzed; (2) a trend upward-mining toppling mechanical model of the hydraulic support in a free state is built, and a calculation formula of an upward-mining critical dip angle is obtained; (3) mining conditions of a work face and parameters relevant to the hydraulic support are input, and the upward-mining critical dip angle and a trend stability state are obtained; (4) a trend upward-mining toppling mechanical model of the hydraulic support in a working state is built, and a calculation formula of the upward-mining critical dip angle is obtained; and (5) mining conditions of the work face and parameters relevant to the hydraulic support are input, the upward-mining critical dip angle and the trend stability state are obtained, and a theoretical foundation is provided to timely take the measures of preventing the hydraulic support from toppling in a coal re-mining process of the work surface. The stability method enables the calculation result to be more accurate, is capable of reflecting the objective reality more actually, and enables the measures to be taken timely.
Description
technical field [0001] The invention relates to a method for stabilizing a hydraulic support of a fully mechanized mining face in a coal mine, in particular to a method for stabilizing the direction of a hydraulic support of a high-inclination mining face. Background technique [0002] At present, my country's proven high-dip-angle coal seam reserves account for about 17% of the country's total coal reserves, mainly in the western and eastern coastal areas of my country. For fully mechanized mining faces with large inclination angles, ensuring the stability of fully mechanized mining equipment is an important prerequisite for safe and efficient production of the working face, and the hydraulic support accounts for 80% of the total equipment weight and more than 60% of the cost. It is an important issue to be considered in fully mechanized mining. At the same time, when the working face has a large inclination angle, it is also faced with the influence of large-angle downward...
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IPC IPC(8): E21D23/16
Inventor 马立强金志远曹新奇王飞
Owner CHINA UNIV OF MINING & TECH