Safety countermeasures for ground pressure disasters in quartz mines

Whether the shape specification of the security pillar meets the requirements of the regulations, the stability of the goaf is the biggest safety hazard of the mine. To prevent the occurrence of geological disasters, the following safety measures should be taken:

1. Find the technical data of the past mining, as well as the field survey, clearly describe the geometric parameters of the goaf in the middle section, the top and bottom plates, the shape of the pillars, etc. on the drawings;

2. According to the requirements of the regulations, all old goafs and abandoned shafts shall be sealed, and the blockage shall be constructed by brick walls or concrete walls;

3. Reserve appropriate holes at the bottom of the closed wall to allow the water in the goaf to drain smoothly;

4. All safety pillars are strictly prohibited from being recovered or destroyed during the use period to ensure their integrity; if the pillars that do not meet the specifications cannot withstand the upper pressure, they should be supported by artificial false columns:

5. In the construction of the tunnel below 140m, the well should be located in the hard and homogeneous rock body, determine the reasonable section and shape of the well, adhere to a reasonable mining sequence, the area of â€‹â€‹the goaf should not be too large, and the tunneling speed should be moderate. ;

6. Determine reasonable rock drilling and blasting parameters, strictly control the explosive quantity according to the blasting design requirements, and implement interval delay blasting to reduce blasting vibration;

7. Set up full-time personnel to be responsible for the pressure management work, use advanced monitoring equipment, establish a fixed observation point (net), keep abreast of the changes of the ore and rock, and find the signs of large-scale ground pressure activities, stop production immediately, withdraw Personnel and equipment;

8. Embed the necessary observation points around the existing collapse cracks, observe regularly, strengthen management, mark the boundary lines of potential collapse areas as accurately as possible, and establish obvious safety warning signs.

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