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Cemented filling material for coal mines and preparation method thereof
The invention provides a coal mine cemented filling material and a preparation method thereof. The preparation method comprises the steps: adding water into a stirrer, stirring, adding a viscosity modifier and stirring for 30-40 s to be uniform; reducing the rotating speed of the stirrer, adding fly ash and a cementing material, and stirring for 40-50 s to obtain a cementing material; reducing therotating speed of the stirrer, adding coal gangue into the cementing material, and stirring for 50-60 s, wherein the mass percentages of the coal gangue, the coal ash, the cementing material, the viscosity modifier and the water are 46-50%, 18-22%, 10-7%, 1-3% and 25-18% respectively, the mass ratio of the coal gangue with the particle size of 0-5 mm to the coal gangue with the particle size of 5-10 mm to the coal gangue with the particle size of 10-15 mm is 21:15:14, and the mass ratio of the secondary coal ash to the fine coal ash to the original coal ash is 18:35:7. The filling material isgood in pumpability, and pipe blockage accidents are prevented.
本发明提供了一种煤矿用胶结充填材料及其制备方法，包括将搅拌机中加入水搅拌，并将黏度改性剂加入搅拌30‑40s至均匀；降低搅拌机转速，将粉煤灰和胶结料加入，搅拌40‑50s，得到胶凝材料；降低搅拌机转速，将煤矸石加入至胶凝材料，搅拌50‑60s；其中，煤矸石、粉煤灰、胶结料、黏度改性剂和水的质量分数分别为46‑50％、18‑22％、10‑7％、1‑3％和25‑18％，0‑5mm、5‑10mm、10‑15mm煤矸石质量比为21：15：14，二级粉煤灰、细粉煤灰、原粉煤灰的质量比为18：35：7。该充填材料泵送性好，防止了堵管事故的发生。
Cemented filling material for coal mines and preparation method thereof
The invention provides a coal mine cemented filling material and a preparation method thereof. The preparation method comprises the steps: adding water into a stirrer, stirring, adding a viscosity modifier and stirring for 30-40 s to be uniform; reducing the rotating speed of the stirrer, adding fly ash and a cementing material, and stirring for 40-50 s to obtain a cementing material; reducing therotating speed of the stirrer, adding coal gangue into the cementing material, and stirring for 50-60 s, wherein the mass percentages of the coal gangue, the coal ash, the cementing material, the viscosity modifier and the water are 46-50%, 18-22%, 10-7%, 1-3% and 25-18% respectively, the mass ratio of the coal gangue with the particle size of 0-5 mm to the coal gangue with the particle size of 5-10 mm to the coal gangue with the particle size of 10-15 mm is 21:15:14, and the mass ratio of the secondary coal ash to the fine coal ash to the original coal ash is 18:35:7. The filling material isgood in pumpability, and pipe blockage accidents are prevented.
本发明提供了一种煤矿用胶结充填材料及其制备方法，包括将搅拌机中加入水搅拌，并将黏度改性剂加入搅拌30‑40s至均匀；降低搅拌机转速，将粉煤灰和胶结料加入，搅拌40‑50s，得到胶凝材料；降低搅拌机转速，将煤矸石加入至胶凝材料，搅拌50‑60s；其中，煤矸石、粉煤灰、胶结料、黏度改性剂和水的质量分数分别为46‑50％、18‑22％、10‑7％、1‑3％和25‑18％，0‑5mm、5‑10mm、10‑15mm煤矸石质量比为21：15：14，二级粉煤灰、细粉煤灰、原粉煤灰的质量比为18：35：7。该充填材料泵送性好，防止了堵管事故的发生。
Cemented filling material for coal mines and preparation method thereof
一种煤矿用胶结充填材料及其制备方法
YANG BAOGUI (author) / YANG HAIGANG (author) / WANG XIAOLONG (author) / HUI BO (author) / QI ZHENG (author) / LU XIAOFENG (author) / YIN PENG (author) / TANG DAOGUANG (author)
2020-04-17
Patent
Electronic Resource
Chinese
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