Low-cost quick-setting expansible hole-sealing material applied to coal mine
A sealing material, low-cost technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of small addition, low expansion rate, no utilization, etc., to reduce bleeding , Improve the strength and reduce the cost
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Embodiment 1
[0017] The low-cost quick-setting expansive sealing material for coal mines of the present invention is composed of 50 parts of coal gasification fine ash, 25 parts of sulphoaluminate cement, 0.04 part of citric acid, 5 parts of quicklime, 20 parts of gypsum, and sodium hydroxide. Prepared in 2 parts: First, grind the sulphoaluminate cement to 350-400m 2 After mixing with citric acid of white crystalline particles; then grind lime and gypsum to 350-400m 2 / kg or so, then mixed with coal gasification fine ash, sulphoaluminate cement, citric acid, and sodium hydroxide, weighed and bagged, and stored away from moisture.
[0018] During construction, according to the actual amount, mix the sealing material and water at a ratio of 1:1~1.5 to form a slurry and then use it.
Embodiment 2
[0020] The low-cost quick-setting expansive sealing material for coal mines of the present invention is composed of 40 parts of coal gasification fine ash, 30 parts of sulphoaluminate cement, 0.09 part of citric acid, 7.5 parts of quicklime, 22.5 parts of gypsum, and sodium hydroxide. Prepared in 2.5 parts: First, grind the sulphoaluminate cement to 350-400m 2 After mixing with citric acid of white crystalline particles; then grind lime and gypsum to 350-400m 2 / kg or so, and then mixed with coal gasification fine ash, sulphoaluminate cement, citric acid and sodium hydroxide, weighed and bagged, and stored away from moisture.
[0021] It can be prepared according to Example 1 during construction.
Embodiment 3
[0023] The low-cost quick-setting expansive sealing material for coal mines of the present invention is composed of 30 parts of coal gasification fine ash, 35 parts of sulphoaluminate cement, 0.15 part of citric acid, 10 parts of quicklime, 25 parts of gypsum, and sodium hydroxide. Prepared in 3 parts: First, grind the sulphoaluminate cement to 350-400m 2 After mixing with citric acid of white crystalline particles; then grind lime and gypsum to 350-400m 2 / kg or so, and then mixed with coal gasification fine ash, sulphoaluminate cement, citric acid and sodium hydroxide, weighed and bagged, and stored away from moisture.
[0024] It can be prepared according to Example 1 during construction.
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