Treatment technology for underground water leakage accident

(1) The wall of the roadway and the coal wall “hang sweat”. This is caused by the condensed pressure on the surface of the rock and coal seam after the pressure water seeps through the fine cracks.

(2) The coal seam becomes cold. When the water content of the coal seam increases, the thermal conductivity increases, so there is a feeling of cool when the coal wall is touched by hand.

(3) The water is enlarged, the top plate is pressed or the bottom plate is bulged and there is water seepage.

(4) A pressure water flow (or water line) appears. This indicates that it is close to the water source, such as turbid water, indicating that the water source is very close; if the water is clear, the water source is slightly farther.

(5) The coal seam has water extrusion and emits a “beep” sound, and there is fashion to hear the sound of empty water.

(6) Increased harmful gases in the working face. The water-storing area often excites gas, gas, carbon dioxide and hydrogen sulfide.

(7) The coal wall or the roadway wall is “hanging red”, the acidity is large, the water smell is blemish and the smell of rotten eggs is the characteristic of the old empty water.

(8) The coal is dark and dark. The dry, bright coal becomes damp and dull due to the infiltration of water. If the surface layer is dug, it is still inside, indicating that there is water nearby.

(2) General principles for dealing with downhole floods

(1) It is necessary to understand the location, nature, estimated water volume, static water level, water inrush after water inrush, range of impact, recharge water source and influential surface water bodies.

(2) Master the scope of the disaster area. Such as the distribution of personnel before the accident, the location of the living conditions in the mine, and the possible access to the site.

(3) Organize strong discharge according to the amount of water accumulated and the amount of water inflow. At the same time, mobilize the masses to block the ground supply water source, and eliminate the affected surface water volume. If necessary, grout can be used to block water.

(4) Strengthen the ventilation in the drainage and rescue, cut off the power supply in the disaster area, and prevent all fire sources. Prevent the accumulation and gush of gas and other harmful gases.

(5) After the drainage, in the reconnaissance and rescue, it is necessary to prevent the roof and the secondary flood.

(6) Handling and rescuing the victims shall be carried out in accordance with medical protective measures. (3) Restoration of flooded mines

After the mine is submerged, it is extremely important to remove the accumulated water. The drainage work is very complicated. First, the water source should be investigated and researched, and then the drainage equipment with appropriate capacity should be selected to organize the drainage and recovery work. The methods of drainage are:

(1) Direct draining method. It is to increase the drainage capacity and directly drain all the water in the wells. This method can only be used when the water volume is small or the water source is limited.

(2) First block the rear row method. When the amount of water in the well is particularly large, and it is impossible to drain the water when the pump capacity is increased, the water inflow channel must be blocked first, and then drained.

During the entire recovery work, you must pay great attention to ventilation and discharge harmful gases.

Safety measures during drainage are:

(1) Check the gas frequently. When the gas content in the wellbore air reaches 1%, the discharge to the underground power transmission drains is reduced to less than 1%.

(2) Check other harmful gases in time.

(3) It is strictly forbidden to use an open flame lamp or other fire source in the wellbore or near the wellhead.

To strengthen ventilation and make tiles

(4) Safety belts and self-rescuers must be worn by personnel who install drains or perform other work in the wellbore.

(5) When restoring the shaft, special attention should be paid to prevent roofing and falling accidents.

(4) The rescue of trapped people in the underground

The trapped people in the underground must first achieve emotional stability, strengthen their confidence, and at the same time pay attention to preserving their physical strength. They must do everything possible to get in touch with the outside world, such as using stones or other tools to regularly hit the roadway, coal wall, etc. Create conditions for rescuers to find themselves.

(1) When trapped persons are found underground, it is forbidden to directly illuminate the eyes of the trapped person with the headlight beam to avoid sharp contraction of the pupil under strong light puncturing, resulting in blindness. The headlights can be covered with red cloth, paper, clothes, etc., so that the light is weakened, and the eyes of the trapped person can be covered with a cloth, so that the pupils are gradually contracted, and the glare can only be seen after returning to normal.

(2) When trapped persons are found, they should not be lifted out of the well immediately. They should pay attention to maintaining body temperature, lift them to a safe place and, under the protection of the ambulance team, send doctors to check the body of the trapped person and give necessary treatment (such as Bandaging, infusion, injection, etc.).

(3) In the case that the trapped person has not eaten for a long time, he cannot eat hard food and excessive diet to avoid accidents and cause adverse consequences.

(4) When the ambulance team arrives at the sheltered area to avoid the fire source and other hazards after the inspection, the oxygen bottle can be opened and oxygen can be released to increase the oxygen content in the air. For people without oxygen breathing apparatus, it is forbidden to go to the shelter.

(5) When carrying trapped people, pat gently and maintain balance to avoid vibration.

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