Grouting method for fracture zone of karst stratum

Abstract

The invention provides a karst stratum fault zone grouting method which comprises the following steps: performing a tracing test on a first branch drill hole arranged in a fault zone of a karst stratum to obtain a diffusion range of a tracer agent, and determining a hole arrangement pitch of the fault zone according to the diffusion range; according to the transverse distribution length of the fault zone and the hole distribution distance, the branch transverse position of a second branch drill hole is determined; according to the top positions of aquifers in the karst strata on the two sides of the fault zone, the branch longitudinal position of a second branch drill hole corresponding to each branch transverse position is determined; and according to the transverse position of each branch and the longitudinal position of the branch corresponding to the transverse position of each branch, second branch drill holes are formed in the fault zone, and grouting is conducted on the second branch drill holes. According to the method, effective regional treatment is carried out on the fault zone, and the number of drilled holes and grouting liquid consumption are reduced.

Description

technical field [0001] The invention relates to the technical field of mine water hazard prevention and control, in particular to a grouting method for fault zones in karst strata. Background technique [0002] When there is a karst confined aquifer in the coal seam floor, there is a high probability that water inrush accidents will occur in fault zones such as faults. The karst fault zone has the characteristics of uneven distribution, large extension length, well-developed fissures, and difficulty in sealing. The karst fault zone, as a water storage space and water channel, is the key geological element to control the occurrence of water hazards. One of the problems of prevention. [0003] Precise exploration and effective treatment of fault zones in coal mining areas is an important technical way to prevent mine water inrush. The fault zone is produced by the process of crustal movement, and the distribution of the fault zone in the region has certain regularity, but ge...

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Problems solved by technology

[0006] The present invention provides a grouting method for fault zones in karst formations, which is used to solve the problem that a large number of drilling holes are required for grouting in fault zones in the prior art, which can only form local treatment defects, so as to reduce the amount of drilling holes and form an effective area for fault zones sexual governance

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