Coal mine rockbolt shoring current situation,necessity and significance having discussed rockbolt shoring parameter optimization design combining with leaping forward.

结合跃进煤矿护现状,探讨了护参数优化设计的必要性和重要性。

The rock bolt for superspeed hardening agent sandwich cement cartridge is a simple and valid rock bolt as a support.

超快硬夹心水泥卷是一种简单有效的护。

Description is made on the principle and application result of the short group bolting of slushing roadways in loosened rock.

论述了短群护碎裂岩石中耙道的原理及实施效果。

Technical scheme, design, construction and application of steel pipe soil nail combining rabbling pile in a foundation ditch support in Shenzhen.

摘要介绍了深圳某基坑护程钢管土钉与搅拌桩组合护技术方案、设计、施及应情况。

Safety effective of metal forepole support was analyzed in beam and bolting with wire mesh,problem and improvement was given safety effective was ensured.

针对金属前探护在架棚及网护巷道中的安全作进行了全面分析,提出了改进方案和存在问题,确保了金属前探护的安全作。

Accoording to the result on observation of rock pressure,adaptability of telescopiform bolt in soft rock road and reasonable structural parameter are analysed.

矿压观测结果分析了可拉伸对软岩巷道护的适应性及其合理的结构参数。

A mechanics model of dynamometry bolt was given and it was shown that dynamometry bolt mainly bear tension and torque in real application.

给出巷道护中测力的力学模型,指出测力实际应中主要承受拉力、扭矩作。

Due to the complexity of occurrence condition and the polytropy of influencing factors,the excavation and supporting in soft failure roadway under high ground stress become very difficult.

高地应力破碎软岩巷道,由于赋存条件的复杂性和影响因素的多变性,使得该类巷道的开挖与护极为困难。

It is found that the rational located destressing boreholes can induce structural failure of the surrounding rock-mass,consequently the high stress move deeply in the rock-mass,and the stres...

在卸压孔和网联合护后改善了围岩附近的应力环境,改变了围岩破坏的时空次序,对控制围岩变形和破坏具有突出的优越性.