Filling and reinforcing method for processing complicated goafs

Abstract

The invention discloses a filling and reinforcing method for processing complicated goafs. The method mainly includes grouting hole position selection and grouting pressure control, is combined with the filling method, and adopts diagonal grouting holes, safety risks of direct construction on the goaf ground surface are avoided, damages to integrities of other rocks on the upper portion are reduced, and stability and structuration of the goaf are guaranteed better; diagonal filling is adopted, reinforcement is performed gradually, the entire goaf is filled, bearing capacity of the entire goaf is improved, and strength requirements of the roof is guaranteed during seam mining; the interval grouting method and the manner of thinning firstly and thickening later are adopted, the fluency and filling rate of grout in subsided rocks are guaranteed, grout concentration is changed while accelerator is added properly, and the filling and reinforcing effect of the entire goaf is improved ultimately; the processing effect of filling and reinforcing is significant to the complicated goafs which have low mine rock integrity and which are still mined as required.

Description

technical field [0001] The invention relates to the field of mining, in particular to a filling reinforcement method for dealing with complicated goafs. Background technique [0002] Since the end of the 20th century, the mining order in my country has been relatively chaotic. Illegal and disorderly mining has left a large number of gobs in some mines and their surrounding areas, which directly affects the safe production of mining and the damage to the surrounding environment. , so the processing of the goaf becomes urgent. [0003] At present, according to different conditions such as the roof characteristics, the thickness of the ore seam, and the special requirements for protecting the surface, the commonly used treatment methods for gobs include the full caving method, the filling method, and the pillar support method. The whole caving method is simple, reliable and less expensive to deal with goafs, so this method should be adopted as much as possible when the conditio...

AI Technical Summary

Problems solved by technology

The whole caving method is simple, reliable and less expensive to deal with goafs, so this method should be adopted as much as possible when the conditions are suitable, but this will affect the continued mining of deep mines and lead to waste of mineral resources; the filling method mainly includes gangue filling , water sand filling, paste filling, etc. These methods are feasible for the treatment of general goafs, but for complex goafs (the rock formations in the goaf are poor, the interior of the goaf is partially subsided, and the ground surface cannot meet the load-bearing requirements of the equipment) , this method has hidden dangers in construction safety and is difficult to implement; the pillar support method is suitable for goafs with better rock formation integrity, and this method is difficult to construct and requires high technical requirements

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