Water-resisting layer strengthening grouting transformation device and method based on staged fracturing

Abstract

The invention discloses a water-resisting layer strengthening grouting transformation device and method based on staged fracturing. The device comprises at least two fracturing grouting controllers which are sequentially connected in series through high-pressure fracturing pipe columns, and the high-pressure fracturing pipe columns between the fracturing grouting controllers are connected with safety opening devices in series; each fracturing grouting controller comprises an outer sleeve, a packing capsule, an inner sleeve, a pressure spring and a one-way blocking elastic piece; each outer sleeve is provided with a first opening and a second opening, and a valve seat is arranged in each outer sleeve; each packing capsule is arranged outside the corresponding outer sleeve in a sleeving mode and communicates with the corresponding first opening; each inner sleeve is slidably matched in the corresponding outer sleeve, each pressure spring is supported between the corresponding inner sleeve and the corresponding valve seat, each inner sleeve is provided with a third opening and a fourth opening, each third opening can be aligned with the corresponding first opening, each fourth opening can be aligned with the corresponding second opening, and a first ball seat is further arranged at the inner end of each inner sleeve; and each one-way blocking elastic piece is arranged on the inner side of the corresponding valve seat. According to the water-resisting layer strengthening grouting transformation device and method based on staged fracturing, the problems existing in existing roof water disaster prevention and control can be solved.

Description

technical field [0001] The invention relates to the technical field of underground safety in coal mines, in particular to a device and method for strengthening grouting transformation of a water-resisting layer based on staged fracturing. Background technique [0002] The overburden of coal seams varies greatly in my country. Compared with the eastern mining areas, the ecological environment in the western mining areas is relatively fragile. Large-scale and high-intensity underground mining has led to aggravated damage to water resources in the western mining areas. There is a shallow buried soft rock formation in the upper part of the coal seam in the western mining area. The movement and range of the roof strata are particularly sensitive and strong in the horizontal and vertical directions. The fracture zone and the water-conducting (sand) fracture zone are fully developed, and the mining fracture can even directly communicate with the surface, forming a large-scale groun...

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Problems solved by technology

[0005] Aiming at the defects in the prior art, the present invention provides a water-resisting layer strengthening grouting transformation device and method based on staged fracturing, so as to overcome the problems existing in the prevention and control of existing roof water damage and realize effective control of roof water damage and ground protection. Protection of water resources and ground ecology

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