Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Wet-type concrete spraying process for non-coal underground mine
The invention discloses a wet-type concrete spraying process for a non-coal underground mine. The wet-type concrete spraying process comprises the following steps: (1) preparing semi-finished concrete: sand, stone, cement, a concrete hydrating agent except an accelerator and water are fed into a ground forced mixer for primary mixing, semi-finished concrete is prepared, and water is added according to the water-cement ratio of 0.28-0.30; (2) preparing finished concrete: the semi-finished concrete is fed to a double-screw stirring conveyor, water and a water reducing agent are added, and secondary mixing is carried out to obtain finished concrete, and water is added according to the water-cement ratio of 0.55-0.6; and (3) spraying concrete: the prepared finished concrete is fed to a hopperof a wet spraying machine through a double-screw stirring conveyor, the accelerator and the stirred finished concrete are uniformly mixed, and the mixture is sprayed to the rock surface of an excavated and formed roadway or chamber through the wet spraying machine. According to the invention, a concrete secondary mixing process is adopted, so that the workability of a mixture required by sprayingequipment and the process can be met, and materials can be continuously supplied to the spraying equipment.
本发明公开了一种非煤地下矿山湿式喷射混凝土工艺，包括如下步骤：(1)制备半成品混凝土；将砂、石料、水泥、除速凝剂外的混凝土水化剂和水送入地面强制式搅拌机进行初次搅拌，制成半成品混凝土，水加入量按0.28～0.30水灰比加水；(2)制备成品混凝土；将半成品混凝土上料至双螺旋搅拌输送机进行加水和减水剂进行二次拌合为成品混凝土，水加入量按0.55～0.6水灰比加水；(3)混凝土喷射作业；将制备好的成品混凝土经双螺旋搅拌输送机至湿喷机料斗，将速凝剂和搅拌好的成品混凝土均匀混合后，通过湿喷机喷射到开挖成型的巷道或硐室岩面上。本发明采用混凝土二次拌和工艺，能够满足喷射设备及工艺所需的拌合物工作性和连续向喷射设备供料。
Wet-type concrete spraying process for non-coal underground mine
The invention discloses a wet-type concrete spraying process for a non-coal underground mine. The wet-type concrete spraying process comprises the following steps: (1) preparing semi-finished concrete: sand, stone, cement, a concrete hydrating agent except an accelerator and water are fed into a ground forced mixer for primary mixing, semi-finished concrete is prepared, and water is added according to the water-cement ratio of 0.28-0.30; (2) preparing finished concrete: the semi-finished concrete is fed to a double-screw stirring conveyor, water and a water reducing agent are added, and secondary mixing is carried out to obtain finished concrete, and water is added according to the water-cement ratio of 0.55-0.6; and (3) spraying concrete: the prepared finished concrete is fed to a hopperof a wet spraying machine through a double-screw stirring conveyor, the accelerator and the stirred finished concrete are uniformly mixed, and the mixture is sprayed to the rock surface of an excavated and formed roadway or chamber through the wet spraying machine. According to the invention, a concrete secondary mixing process is adopted, so that the workability of a mixture required by sprayingequipment and the process can be met, and materials can be continuously supplied to the spraying equipment.
本发明公开了一种非煤地下矿山湿式喷射混凝土工艺，包括如下步骤：(1)制备半成品混凝土；将砂、石料、水泥、除速凝剂外的混凝土水化剂和水送入地面强制式搅拌机进行初次搅拌，制成半成品混凝土，水加入量按0.28～0.30水灰比加水；(2)制备成品混凝土；将半成品混凝土上料至双螺旋搅拌输送机进行加水和减水剂进行二次拌合为成品混凝土，水加入量按0.55～0.6水灰比加水；(3)混凝土喷射作业；将制备好的成品混凝土经双螺旋搅拌输送机至湿喷机料斗，将速凝剂和搅拌好的成品混凝土均匀混合后，通过湿喷机喷射到开挖成型的巷道或硐室岩面上。本发明采用混凝土二次拌和工艺，能够满足喷射设备及工艺所需的拌合物工作性和连续向喷射设备供料。
Wet-type concrete spraying process for non-coal underground mine
一种非煤地下矿山湿式喷射混凝土工艺
YUAN SHILUN (Autor:in) / CHENG ZHANMING (Autor:in) / XU GANG (Autor:in) / CHEN JINPING (Autor:in) / LIU SHOU'AN (Autor:in) / NIE JINXUE (Autor:in) / LIU WENLONG (Autor:in)
20.11.2020
Patent
Elektronische Ressource
Chinesisch
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