采用这种方法是在爆破前,将超前锚杆打入掘进前方稳定岩层内,末端支承在拱部围岩内专为超前锚杆提供支点的径向悬吊锚杆,或支承在作为支护的结构锚杆上,使其起到支护掘进进尺范围内拱部上方,有效地约束围岩在爆破后的一定时间内不发生松弛坍塌。
下温洋电站引水隧洞塌方的成因分析与处理_中国矿权网 关键词 :隧洞 破碎带 塌方 钢支架 超前锚杆 [gap=507]Key words :tunnel, crushing zone, down fall, steel support, advance anchor bolt
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... 局部锚杆local rockbolt 超前锚杆advance rockbolts; leading bolt 全长胶结型锚杆adhesive type rock bolt; completely grouted bolt ...
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隧道知识集萃.zip ... 局部锚杆local rockbolt 超前锚杆advance rockbolts; leading bolt 全长胶结型锚杆adhesive type rock bolt; completely grouted bolt ...
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A program is compiled, which isused to analyzed factors of stability of forepoling bolts with soil nailing protection.5.
5、提出将坑底稳定性作为复合土钉基坑工程设计内容之一的思想,整理出一套超前锚杆复合土钉支护的设计计算思路。
参考来源 - 超前锚杆复合土钉支护在软土层中的应用研究·2,447,543篇论文数据,部分数据来源于NoteExpress
实践证明,采用超前锚杆支护能够加快掘进速度、保障安全生产和节约掘进成本。
Carry out a certificate, adopt the advance rockbolt shoring to be able to accelerate driving speed, ensure safety...
超前支护锚杆锚固后与顶板岩石构成一体,这样使超前锚杆形成组合梁作用,放炮后,能够阻止顶板岩石冒落。
Forward support bolt combined with roop rock by bolting can play a roll of combined beam, which can prevent roof rock caving immediately after explosion.
本文介绍煤矿井下掘进巷道锚杆支护工作面用于临时超前支护的一种可调配比式轻型乳化液泵站。
The paper introduces an adjustable compounding light-duty emulsion pump station used for temporary fore support at the roof-bolt face of underground heading roadway.
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