Huge thick heterogeneous sandstone water disaster area prevention and control method

Abstract

The invention provides a huge thick heterogeneous sandstone water disaster area prevention and control method, which comprises the following steps of: jointly determining a water-rich abnormal area by adopting various geophysical exploration methods, drilling unit water inflow and a water-bearing layer water yield prediction method based on a sedimentary water control rule, designing a directional long drilling main hole according to the determination of the water-rich abnormal area and the flow direction of underground water. The reliability of a water yield property prediction result of a coal seam exploration top plate water-containing layer is improved, and a reliable basis is supplied for top plate drainage borehole arrangement. Meanwhile, on the basis of a water yield property abnormal area delineation result and a water flowing fissure zone height judgment result, through measurement of an underground water current direction and flowing velocity and simulation of an underground water flow field, directional long drill holes are formed along the water flowing fissure zone along the direction perpendicular to the underground water flowing direction, branch holes are formed in a water-rich abnormal area to drain roof water in the water-rich abnormal area, the number of the drill holes is reduced, and the coal mine water prevention and control cost is reduced.

Description

technical field [0001] The invention relates to the field of water prevention and control in coal mines, in particular to a method for preventing and controlling water hazards in extremely thick heterogeneous sandstone areas. Background technique [0002] In recent years, the water inflow of production mines in western China has increased year by year, which is far from the expected water inflow during the exploration stage. In addition, the roof of the regional coal seam is covered with a thick sandstone pore-fissure aquifer, and the water-rich property is extremely uneven. Can the scientific prevention and control of roof water damage be carried out? Work is an important factor for mine safety and efficient mining, and has important economic and social significance. [0003] At present, the means of prevention and control of roof water hazards include dredging before coal mining (advance dredging), aquifer reconstruction by grouting, curtain grouting, filling mining or lim...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem that the dredging area cannot be determined in advance dredging in the prior art, resulting in low dredging efficiency, the present invention provides a method for preventing and controlling water damage in extremely thick heterogeneous sandstone areas, which can effectively determine the dredged area, and improved discharge efficiency

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