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High-porosity filling material capable of quickly and efficiently cementing gangue and preparation method of high-porosity filling material
The invention relates to the field of coal mine filling mining, in particular to a high-porosity filling material for rapidly and efficiently cementing gangue and a preparation method. The preparation method comprises the following steps: paving a layer of coal gangue at the bottom of a mold, and spraying a quick-cementing cementing material through a pressurizing spray head; repeating the previous steps to lay the coal gangue layer by layer and spray the quick-bonding cementing material layer by layer until the top of the mold is reached, and covering the upper sealing cover of the mold; pouring a quick-cementation cementing material into the mold at a static pressure until the quick-cementation cementing material appears at the bottom of the mold; and standing for 0.5 h to obtain the high-porosity filling material. Testing the porosity and the uniaxial compressive strength; changing the target porosity of the high-porosity filling material by changing the particle size grading of the coal gangue, repeating the steps, and establishing a prediction model between the porosity and the uniaxial compressive strength; and screening out the grain size grading of the coal gangue corresponding to the high-porosity filling material with the porosity not lower than 20% and the uniaxial compressive strength not lower than 0.14 MPa.
本发明涉及煤矿充填开采领域，特别涉及矸石快速高效胶结的高孔隙充填材料及制备方法。该制备方法包括以下步骤：在模具底部铺设一层煤矸石，通过加压喷头喷淋快速粘凝胶结材料；重复前述步骤，以逐层铺设煤矸石、逐层喷淋快速粘凝胶结材料，直至达到模具的顶部后，盖上模具的上封盖；向模具中静压灌注快速粘凝胶结材料，直至模具的底部出现快速粘凝胶结材料；静置0.5h后得到高孔隙充填材料；测试其孔隙率和单轴抗压强度；通过改变煤矸石的粒径级配，以改变高孔隙充填材料的目标孔隙度，重复上述步骤，建立孔隙度与单轴抗压强度之间的预测模型；筛选出孔隙度不低于20％且单轴抗压强度不低于0.14MPa的高孔隙充填材料所对应的煤矸石的粒径级配。
High-porosity filling material capable of quickly and efficiently cementing gangue and preparation method of high-porosity filling material
The invention relates to the field of coal mine filling mining, in particular to a high-porosity filling material for rapidly and efficiently cementing gangue and a preparation method. The preparation method comprises the following steps: paving a layer of coal gangue at the bottom of a mold, and spraying a quick-cementing cementing material through a pressurizing spray head; repeating the previous steps to lay the coal gangue layer by layer and spray the quick-bonding cementing material layer by layer until the top of the mold is reached, and covering the upper sealing cover of the mold; pouring a quick-cementation cementing material into the mold at a static pressure until the quick-cementation cementing material appears at the bottom of the mold; and standing for 0.5 h to obtain the high-porosity filling material. Testing the porosity and the uniaxial compressive strength; changing the target porosity of the high-porosity filling material by changing the particle size grading of the coal gangue, repeating the steps, and establishing a prediction model between the porosity and the uniaxial compressive strength; and screening out the grain size grading of the coal gangue corresponding to the high-porosity filling material with the porosity not lower than 20% and the uniaxial compressive strength not lower than 0.14 MPa.
本发明涉及煤矿充填开采领域，特别涉及矸石快速高效胶结的高孔隙充填材料及制备方法。该制备方法包括以下步骤：在模具底部铺设一层煤矸石，通过加压喷头喷淋快速粘凝胶结材料；重复前述步骤，以逐层铺设煤矸石、逐层喷淋快速粘凝胶结材料，直至达到模具的顶部后，盖上模具的上封盖；向模具中静压灌注快速粘凝胶结材料，直至模具的底部出现快速粘凝胶结材料；静置0.5h后得到高孔隙充填材料；测试其孔隙率和单轴抗压强度；通过改变煤矸石的粒径级配，以改变高孔隙充填材料的目标孔隙度，重复上述步骤，建立孔隙度与单轴抗压强度之间的预测模型；筛选出孔隙度不低于20％且单轴抗压强度不低于0.14MPa的高孔隙充填材料所对应的煤矸石的粒径级配。
High-porosity filling material capable of quickly and efficiently cementing gangue and preparation method of high-porosity filling material
一种矸石快速高效胶结的高孔隙充填材料及制备方法
XIE HEPING (author) / ZHANG JIXIONG (author) / ZHOU NAN (author) / XU JIANFEI (author) / LI ZEJUN (author) / WANG YUNBO (author)
2023-12-22
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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