How to explore the water in the alleys and downhill?

When drift inclined coal layer tunneling, tunneling generally double lane, lane ahead single water exploration method. That is to use the roadway above the old sky to explore the water ahead of the road. The water drilling holes are generally punched in the front and the upper direction. The slope of the roadway is mostly sloped. In order to make the water flow smooth, do not change the slope arbitrarily. In the waterway area, it is necessary to construct the waist line according to the design. If the waist line is not well controlled, it is easy to produce stagnant water. In severe cases, it can block the roadway. If the coal seam dip is small, all the alleys should be explored, and the number of water holes should be increased. In the process of roadway excavation, faults must be treated carefully. Drilling water into another plate of the fault should not be risky.

In the downhill roadway, in addition to paying attention to the working surface and the two sets of water, it is necessary to prevent the water from flowing behind. At the same time, there are many roadways for excavation in the same mining area. The excavation working face or water inspecting hole in the high construction area must ensure that no water is poured down the mountain. If there is a possibility of water inrush on the working face and there is no guarantee that the downhill worker is safe, the working face of the downhill should stop working and no one should stay. If the downhill roadway is dug in the old airspace, it is necessary to properly inspect the water holes in the two gangs. The support of the two roadways should be strengthened to prevent the gangs from escaping. In order to ensure the safety of the tunneling, the roadway near the old sky should be excavated to reduce or eliminate the threat of water damage and avoid personal accidents.

The mining face is generally not easy to effluent, so it is often overlooked. However, in the case of long-wall mining, once the working surface is discharged, the upper safety exit is also blocked, and the personnel on the working surface will have no way to retreat. Therefore, it is necessary to ensure the quality of the working surface, especially the upper groove, and the safety exit should be unobstructed.

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