Advanced treatment method for water damage of working face of coal mine downhill roadway

Abstract

The invention discloses an advanced treatment method for water damage of a working face of a coal mine downhill roadway, and relates to the field of mines. The method mainly comprises the following steps that drilling holes are formed, specifically, a first drainage chamber is excavated behind the working face, and drainage holes are drilled along a roadway bottom plate from the drainage chamber;and immersed tube drainage is conducted, specifically, exhaust pipes are connected section by section and extend into the drainage drilling holes till the bottoms of the holes, the ends, positioned inthe drainage chamber, of the exhaust pipes are connected with underground pipeline compressed air, the compressed air is blown to the bottoms of the drainage drilling holes through the exhaust pipesand then flows out rapidly along the drainage drilling holes, meanwhile, accumulated water in the drilling holes is brought out of the drilling holes rapidly, and thus the accumulated water is drained. The problem that in the prior art, a roadway bottom plate near a working face is wet and slippery is solved, and the difficulty of reverse slope retreating of a fully-mechanized excavator is effectively solved; through alternate propelling of the drainage chamber, continuous propelling of construction is ensured; and the problem that dwarf sandstone in a mine hole is muddy when encountering water is effectively solved, and smooth construction is ensured.

Description

technical field [0001] The invention relates to the field of mines, in particular to a method for advanced control of water hazards in the working face of downhill roadways in coal mines. Background technique [0002] For a long time, the safety and progress of the construction of downhill roadway comprehensive excavation (mechanized excavation machine excavation) in the water-rich rock strata of coal mines has been deeply affected by the water in the working area. The bottom of the roadway near the working face is wet and slippery, and the friction between the track of the fully mechanized excavator and the floor of the roadway is greatly reduced, making it difficult for the fully mechanized excavator to retreat after cutting rock. Especially in the downhill roadway with a large inclination angle, it is very difficult for the fully mechanized excavator to retreat against the slope. 3 The retreat distance of -6m often takes 4-6 hours, which seriously affects the speed of the...

AI Technical Summary

Problems solved by technology

The advantage of this method is that it is simple, but the disadvantages are also obvious. First of all, this method cannot solve the problem of wet slippage of the roadway floor near the working face, and the difficulty of retreating against the slope of the fully mechanized excavator is still unsolved; secondly, during the drainage process , a lot of construction work needs to be stopped, such as drainage of gangue, support and other work can only be carried out after the water has been drained; third, for the Jurassic sandstone that "turns into mud when it meets water", this method is not feasible at all; fourth, When the length of the inclined roadway is too long, many pumps are needed to pump and drain the drainage, which increases the complexity of the drainage; fifth, when the working face encounters a large water-rich fissure, and the fissure is connected to other water-rich faults and fissures, Generally, it will drain for many days, and it is impossible to construct the roadway these days

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