Crushing method for thin coal seam floor
A crushing method and thin coal seam technology, applied in the direction of earthwork drilling and discharge machinery, etc., can solve the problems that thin coal seams are difficult to guarantee the mining height and thin coal seam mining efficiency, so as to improve the construction environment, reduce the dust concentration, and ensure the mining height Effect
Pending Publication Date: 2021-12-14
天地(榆林)开采工程技术有限公司 +1
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Problems solved by technology
[0004] The invention provides a crushing method for thin coal seam floor to solve the problem in the prior art that it is difficult to ensure a reasonable mining height for thin coal seam so as to improve the mining efficiency of thin coal seam
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[0029] In order to make the purpose, technical solutions and advantages of the invention clearer, the technical solutions in the invention will be clearly described below in conjunction with the accompanying drawings in the invention. Obviously, the described embodiments are part of the embodiments of the invention, not all of them. Example. Based on the embodiments of the invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the invention.
[0030] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right" , "vertical", "horizontal", "top", "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing thi...
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The invention provides a crushing method for a thin coal seam floor. The method comprises the following steps: drilling the thin coal seam floor through a drilling device to form a hole; and outputting a high-pressure liquid into the hole through a liquid output device, after the drilling device completes preliminary crushing on a thin coal seam bottom plate, outputting the high-pressure liquid into the hole through the liquid output device, and impacting the thin coal seam bottom plate around the hole through the high-pressure liquid; the hydraulic pressure further fractures the thin coal seam floor around the hole, the integrity of the thin coal seam floor is more effectively damaged, the crushing work of the thin coal seam floor is more facilitated, and therefore, the reasonable mining height is guaranteed, the mining efficiency of the thin coal seam is improved, and meanwhile, due to the fact that high-pressure liquid enters fractured cracks, the dust concentration is greatly reduced when the coal mining machine cuts the floor rock, the dust concentration of a mining site is reduced, and the construction environment is improved.
Description
technical field [0001] The invention relates to the technical field of building construction, in particular to a crushing method for thin coal seam floors. Background technique [0002] my country's thin coal seam resources are widely distributed and have abundant reserves. Coal seams with a thickness below 1.3m are generally called thin coal seams during underground mining. As an important coal production base in the world, my country has made major breakthroughs in fully mechanized mining and caving mining of thick coal seams However, it is a relatively weak link in the fully mechanized mining of thin coal seams. The main objective reasons are that the thin coal seam mining space is small and the mining height is unreasonable, which leads to low mining efficiency and ultimately causes a large number of thin coal seam coal resources to be put on hold. [0003] In order to ensure a reasonable mining height in the thin coal seam mining process, the inventor once adopted the me...
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IPC IPC(8): E21C37/12
CPCE21C37/12
Inventor 胡滨张晓雷顺杜龙飞方铭祝凌甫伊丙鼎顾士超孙明清高新宁
Owner 天地(榆林)开采工程技术有限公司