Gas-liquid linkage high-concentration slurry grouting device and method for deep water-rich goaf

Abstract

The invention relates to a slurry grouting device and method, belongs to the field of goaf treatment, and particularly relates to a gas-liquid linkage high-concentration slurry grouting device and method for a deep water-rich goaf. The device comprises a gas-liquid linkage grouting sealing sleeve, a high-concentration slurry pipe and a gas pressure pipe, wherein one end of the high-concentration slurry pipe and one end of the gas pressure pipe are connected with the gas-liquid linkage grouting sealing sleeve, and the other end of the high-concentration slurry pipe and the other end of the gaspressure pipe are connected with a grouting pump and a gas pressure pump correspondingly; and a grouting pressure sensor is arranged at the lower end of the high-concentration slurry pipe. According to the device and the method, a slurry filling pumping system and a gas pressure system are arranged in a grouting hole at the same time in the filling process, the gas-liquid linkage grouting device is used for grouting and filling the deep water-rich goaf, and the purposes of effectively preventing the grouting hole and a pipeline from being blocked and controlling the accumulation range and formof high-concentration slurry are achieved.

Description

technical field [0001] The invention relates to a grouting device and method, belonging to the field of goaf management, in particular to a device and method for gas-liquid linkage high-concentration grouting in deep water-rich goafs. Background technique [0002] With the rapid advancement of urbanization, industrialization, and modernization, the overlying land in the coal mine goaf needs to be activated, and the goaf needs to be filled and treated urgently. The full-fill grouting method using low-concentration grout is currently a common method for goaf treatment. It has the advantages of simple construction, fundamental treatment, and wide application range. The full filling effect of thin slurry in the water-rich and large cavity type goaf is not good, the consumption of grouting slurry is large, and the grouting range is uncontrollable. In order to prevent slurry segregation, the existing technology adopts chemical grouting method to quickly form stone bodies in the g...

AI Technical Summary

Problems solved by technology

Although this process solves the problem of water-rich goaf filling, the process is complicated and there is also a blasting process. If there are still working faces around, it will cause dynamic pressure or other derivative disasters, threatening the safe production of the working face being excavated.

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