Sealing agent for coal mine and its preparation and use method

Abstract

The present invention discloses a coal mine hole sealing agent and a preparation and use method thereof. The coal mine hole sealing agent comprises the following components, by mass, 20-50% of cement, 10-30% of quicklime, 10-30% of fly ash, 1-10% of plaster stone, and 10-30% of water glass. During use, cement, quicklime, fly ash and gypsum are uniformly mixed according to a predetermined ratio, water is added, water glass is finally added, uniform stirring is performed to obtain the hole sealing agent, the obtained hole sealing agent is rapidly injected into boreholes, and a hole sealing effect can be achieved after 15-60 min. Compared with the coal mine hole sealing agent in the prior art, the coal mine hole sealing agent of the present invention has advantages of no pollution, mild reaction, low price, simple construction, tight hole sealing, and the like, and can be widely used for leak stopping of mine underground rocks and coal bed boreholes.

Description

1: Technical field [0001] The invention belongs to the technical field of rock and coal seam drilling plugging in underground mines, relates to a sealing agent and a preparation method thereof, and can be widely used in many fields such as the plugging of coal exploration drilling holes. Two: background technology [0002] In the prior art, after the borehole is excavated, it needs to be closed before proceeding to the next step. For example, after the coal seam is explored, it needs to be sealed to facilitate future mining. [0003] The traditional hole sealing method is to inject yellow mud into the borehole. Due to the limitation of the yellow mud itself, it cannot effectively seal and compact the drill hole. In addition, the yellow mud is difficult to use mechanized operation, which requires a lot of manpower and material resources. The progress of the project Slow, it is bound to affect the progress of the project. For this reason, many scholars at home and abroad hav...

AI Technical Summary

Problems solved by technology

[0004] CN101318802A Wang Yujie and others proposed the use of inorganic materials for sealing holes in the patent "Seismic Exploration Sealing Agent and Its Preparation Method", which clearly requires the content of overburned CaO to be 40%-97%. Since overburned CaO is an expansive substance, Excessive content may break rocks, coal and other substances, failing to achieve the intended purpose of sealing holes

If the number of drilling holes is large, the construction efficiency using this method will decrease, which will inevitably prolong the construction time and affect the progress of the project