Mine water rescue system of fire dust water supply pipeline system is mainly composed of storage tank, pipeline system and all kinds of valves.
1) tank:
According to the code for design of coal mine safety and mine requirements, should be based on the technical and economic comparison of establishing a ground reservoirs, underground tank or the ground and two underground storage tanks. The minimum volume of the tank should be able to keep the 2oom2 of water storage, and should have the fire water do not make him use technical measures.
Mine dust prevention water regulating storage capacity, the total amount of water should be according to the maximum hourly water 2H calculation. A special underground water and fire, water rescue tank can automatically by the water outlet state state usually switch to fire at. If the underground storage tanks and other ground pool building, in addition to eliminate the negative effects, should also guarantee the implementation of the above requirements.
2) water:
Underground fire water including fire hydrant water, sprinkler water use, water spray fire insulation device for water and other fire fighting facilities of water.
Water consumption calculation and selection of relevant parameters shall meet the following requirements:
A. underground fire hydrant water for 5-10 or /s, the fire hydrant water size should be determined according to the mine production capacity and the underground fire risk degree. The design flow of every fire hydrant should be 2.5 liter /s, fire hydrant outlet pressure should be 0, 35-0 · 5MPa, fire duration should be 6h.
B. automatic sprinkler system design parameters should be selected according to the following values: sprinkling intensity of 8 L / (min.m2), the protection of tunnel length is 14-18m, the nozzle outlet pressure is 0.1-0.2MPa, the fire duration is 2h.
C. water spray fire insulation device designed with water, should according to the arrangement of nozzle quantity accumulation, nozzle outlet pressure is 0 2MPa, the working time is 6h.
D dust facilities for water, water, daily working hours required for the selected according to table 1 provides the parameter.
3) water supply pipeline.
In the design of underground water rescue tube, shall comply with the following requirements:
A. flow calculation, calculation of water only various facilities in the same place at the same time;
B. shall ensure that the most remote unfavorable point of water pressure and the corresponding requirements, and proper redundancy;
The wall thickness of C. tube, all kinds of support strength should be determined by calculation, pipe fittings, valves, fire hydrant should be consistent with the pipeline pressure;
D. uses the static pressure, pressure of the pipe section, local high pressure should be adopted, such as blood pressure tank pressure relief valve;
E. facilities at the inlet pressure exceeds the facility work pressure, pressure reducing valve, throttle pipe should be adopted, such as decompression orifice of decompression;
F. pipe interface should be durable, easy disassembly interface fittings.
4) water quality.
Underground water rescue water quality should be consistent with the "design specification" requirements of coal industry:
<30mg/L A. suspended matter content;
B. particle size of suspended solids <0.3mm;
The value of c.PH 6.5-8 5;
Not detected E. total coliforms per 100mL in water sample;
Not detected F. fecal coliforms per 100mL in water sample.
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