Water omens There are certain signs before the underground mining face is permeable. This is the correct conclusion drawn from the lessons of each permeable incident. Therefore, when a water seepage sign is found on the mining face or other locations, the operation must be stopped, measures taken, and the mine dispatching room reported. If the situation is critical, an immediate alert must be issued to evacuate all personnel at the threatened location. Omen characteristics 1, hanging red Mine because the water contains iron oxides, so in the formation fracture through the coal layer, or adhered dark red rust water surface cracks. 2, hanging sweat When the mining face is close to the water-storing area, the water accumulates many water droplets on the coal wall and the rock wall through the crack of the coal rock under its own pressure, but sometimes the moisture in the air encounters the low-temperature coal block and will also condense into Water drops, this is an illusion. Therefore, when encountering sweating, pay attention to distinguishing between authenticity and falseness. The method is to observe whether the fresh surface of coal rock also has moisture. If the coal rock is wet, it is a sign of water permeability. 3, the air is getting cold When the working face is close to a large amount of accumulated water, the temperature suddenly drops, the coal wall is cold, and people feel cool when they enter. The longer they are, the more they feel cool. However , in mines that are greatly affected by geothermal heat , the groundwater temperature is high, and when the mining face is close, the temperature rises. 4, fog occurs When the temperature in the roadway is high, the accumulated water seeps into the coal wall, causing evaporation and rapidly forming a mist. In the above cases, the tunneling must be stopped immediately, the brackets should be reinforced, and the water should be explored. 5, the water is called The high-pressure water in the underground is strongly squeezing to the cracks in the coal rock and the squeaking of the two walls, indicating that the mining face is close to the water-storing area. If the coal roadway is boring, the water will be permeable, and it must be issued immediately. Alert and evacuate all people who are threatened by water. 6, the bottom plate bulges There are two reasons for the bulging of the bottom plate. One is the result of the combined action of the hydrostatic pressure of the water in the confined aquifer (or the catchment area) and the mine pressure. This is a permeable indicator; the other is the pressure of the mine. The role of the side produces a kick drum, which is generally not water intrusive. Therefore, when the bottom drum occurs in the roadway, on the one hand, people are monitored to monitor the development of the kick drum. On the one hand, the mine dispatching room is reported, and the cause of the kick drum is determined in time. If it is confirmed that it is caused by water pressure, it should be taken quickly. There are two reasons for the bulging of the bottom plate. One is the result of the combined action of the hydrostatic pressure of the water in the confined aquifer (or the catchment area) and the mine pressure. This is a permeable indicator; the other is the pressure of the mine. The role of the side produces a kick drum, which is generally not water intrusive. Therefore, when the bottom drum occurs in the roadway, on the one hand, people are monitored to monitor the development of the kick drum. On the one hand, the mine dispatching room is reported, and the cause of the kick drum is determined in time. If it is confirmed that it is caused by water pressure, it should be taken quickly. 2Th Filter Pleating Machine,Air Filter Cleaning Machine,Filter Paper Pleating Machine,Paper Pleated Machine ChangZhou FENGJU Machinery Equipment CO., LTD , https://www.nbfengjumachinery.com