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

结合跃进煤矿杆支护现状,探讨了杆支护参数优化设性和重性。

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

超快硬夹心水泥卷杆一种简单有效支护杆。

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

论述了短杆群支护碎裂岩石中耙道原理及实施效果。

Hydraulic Roofbolter is the key equipment for Ground Anchorage Engineering, and has very important affection to the quality of the engineering.

液压杆钻机岩土工程关键设备，对工程质量有重影响。

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

根据矿压观测结果分析了可拉伸杆对软岩巷道支护适应性及其合理结构参数。

Uncompacted location and grouting saturation degree in the zone of anchorage bar are the two main parameters for judging rock bolts quality.

摘体内不密实位置和灌浆饱和度评价杆质量两个重参数。

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

给出巷道支护中测力杆力学模型,指出测力杆实际应用中主承受拉力、扭矩作用。

After several years to jumbolter research,the hard rocks always present in the soft ones in the wall rock procedure using jumbolter,which results in changing the boring tool during the procedure.

经过几年对杆钻机跟踪研究,发现杆钻机在围岩作业中常遇到软岩中有硬岩夹层现象,造成施工过程经常更换钻具问题。