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A platform for research: civil engineering, architecture and urbanism
Gob-side entry retaining filling material for thin coal seams and medium-thickness coal seams and preparation method thereof
The invention relates to a gob-side entry retaining filling material for thin coal seams and medium-thickness coal seams and a preparation method thereof. The gob-side entry retaining filling materialis prepared from fly ash, water, cement, quick lime and gypsum. The prepared gob-side entry retaining filling material is similar to paste, is filled in a gob-side entry retaining, is short in solidification time, high in strength and low in cost, can be injected into a well after ground slurry preparation, is low in maintenance cost, relieves continuous tension, reduces tunneling work amount, reduces rock burst risk, reduces coal pillar loss, improves coal recovery rate, and increases the economic benefits.
本发明涉及一种薄煤层及中厚煤层沿空留巷充填材料及其制备方法，包括如下原料制成：粉煤灰、水、水泥、生石灰和石膏。本发明制备的薄煤层及中厚煤层沿空留巷充填材料为似膏体，充填在沿空留巷中，凝固时间短，强度高，成本低，可以在地面配浆后注入井下，维护成本低，缓解接续紧张，减少掘进工程量，降低冲击地压发生风险，减少煤柱损失，提高煤炭采出率，增加经济效益。
Gob-side entry retaining filling material for thin coal seams and medium-thickness coal seams and preparation method thereof
The invention relates to a gob-side entry retaining filling material for thin coal seams and medium-thickness coal seams and a preparation method thereof. The gob-side entry retaining filling materialis prepared from fly ash, water, cement, quick lime and gypsum. The prepared gob-side entry retaining filling material is similar to paste, is filled in a gob-side entry retaining, is short in solidification time, high in strength and low in cost, can be injected into a well after ground slurry preparation, is low in maintenance cost, relieves continuous tension, reduces tunneling work amount, reduces rock burst risk, reduces coal pillar loss, improves coal recovery rate, and increases the economic benefits.
本发明涉及一种薄煤层及中厚煤层沿空留巷充填材料及其制备方法，包括如下原料制成：粉煤灰、水、水泥、生石灰和石膏。本发明制备的薄煤层及中厚煤层沿空留巷充填材料为似膏体，充填在沿空留巷中，凝固时间短，强度高，成本低，可以在地面配浆后注入井下，维护成本低，缓解接续紧张，减少掘进工程量，降低冲击地压发生风险，减少煤柱损失，提高煤炭采出率，增加经济效益。
Gob-side entry retaining filling material for thin coal seams and medium-thickness coal seams and preparation method thereof
一种薄煤层及中厚煤层沿空留巷充填材料及其制备方法
WANG LIQIANG (author) / XU XIAOYU (author) / YAN SHENGJUN (author) / WANG YUAN (author) / GUO YU (author)
2021-01-05
Patent
Electronic Resource
Chinese
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