摘要
针对软岩底板大巷频繁底鼓的问题,制定了帮部和底板锚注支护方案,底板采用底角注浆锚杆和中空注浆锚索,选用高性能纳米加固材料和超细水泥注浆材料。效果考察表明:底板锚注治理段3年内底鼓量仅为300 mm,服务期限由原来的2个月提高至3年以上。
In view of the problem of frequent floor heave in the main roadway of soft rock floor,the side and floor bolt-grouting support scheme is formulated.The floor adopts bottom angle grouting anchor rod and hollow grouting anchor cable,high-performance nano reinforcement material and ultra-fine cement grouting material are selected.The effect investigation shows that the floor heave volume of the floor bolt-grouting treatment section is only 300 mm within 3 years,and the service period is increased from 2 months to more than 3 years.
作者
马雁飞
Ma Yanfei(Jinneng Holding Coal Industry Group,Zhaozhuang Coal Industry Co.,Ltd.,Shanxi Changzhi 046600)
出处
《山东煤炭科技》
2023年第3期58-60,67,共4页
Shandong Coal Science and Technology
关键词
软岩
底板
注浆
加固
soft rock
floor
grouting
reinforcement
