Automatic horizontal grouting device for grouting reinforcement of coal mine roof

Abstract

The invention discloses an automatic horizontal grouting device for grouting reinforcement of a coal mine roof. Grouting is conducted in a segmented mode, and the deepest grouting effect can be achieved without excessively increasing the grouting pressure; an auxiliary grouting pipe stretches into a horizontal drill hole and can be tensioned and fixed through an outer hydraulic tensioning sleeve assembly; a grouting head stretches into the auxiliary grouting pipe and can be positioned in the auxiliary grouting pipe through an inner hydraulic tensioning sleeve; and when grouting is conducted toa certain degree and the inner hydraulic tensioning sleeve slides relatively in the auxiliary grouting pipe, that the grouting process of the segment is finished is indicated, then the outer hydraulic tensioning sleeve assembly is subjected to pressure relief, the auxiliary grouting pipe is moved outwards by a certain distance, then the grouting head is fixed through the outer hydraulic tensioning sleeve assembly and the inner hydraulic tensioning sleeve assembly again, and grouting of the outer segment continues to be conducted. The grouting capacity and the grouting effect are improved, allthe segments are grouted under the roughly same grouting pressure, and the whole grouting supporting capacity and reliability are guaranteed.

Description

technical field [0001] The invention specifically relates to an automatic horizontal grouting equipment used for grouting reinforcement of coal mine roofs, and belongs to the technical field of grouting equipment. Background technique [0002] At present, for coal mine roof support reinforcement, grouting reinforcement support is a relatively common method. Grouting reinforcement can use high-pressure grouting to inject grout into the gaps in the coal seam or rock formation, which can effectively ensure the support. protection ability. However, grouting needs to be injected at a higher pressure. However, for horizontal drilling, because the drilling is generally deep, this leads to the common injection method even if it is injected at a very high pressure. If it is too deep, the internal grouting condition is not good, which affects the reliability of grouting, and if the grouting is done by simply increasing the grouting pressure, the cost will increase sharply, and, for t...

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Problems solved by technology

However, grouting needs to be injected at a higher pressure. However, for horizontal drilling, because the drilling is generally deep, this leads to the common injection method even if it is injected at a very high pressure. If it is too deep, the internal grouting condition is not good, which affects the reliability of grouting, and if the grouting is done by simply increasing the grouting pressure, the cost will increase sharply, and, for the deepest side of the hole, the grouting The improvement of the effect is limited, and it is difficult to achieve automatic, efficient and reliable grouting reinforcement

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