Pre-stressed bolt

Description

Damping through the nut in the casting resin anchor agent precisely to the role of stirring, and then pre-stressed.

Let pressure device in a high pressure situation, so that yield tube can be deformed to pressure, buffer and release the pressure of surrounding rock in order to protect against damage to the role of anchor. In order to get a safety of the laneway supporting.

Performance Material specification	Rod diameter (mm)		bearing capacity （KN）
	Rod diameter (mm)		HRB335	HRB400	HRB500	HRB600	HRB335
	nominal dimension	Tolerance	HRB335	HRB400	HRB500	HRB600	specification	Capacity
AT-16	16	+0.3/-0	≥ 100	≥ 120	≥ 135		120×120×5	≥ 100
AT-18	18	+0.3/-0	≥ 126	≥ 150	≥ 172	≥ 206	150×150×5	≥ 135
AT-20	20	+0.3/-0	≥ 157	≥ 180	≥ 210	≥ 260	150×150×6	≥ 170
AT-22	22	+0.3/-0	≥ 190	≥ 225	≥ 250	≥ 310	150×150×8	≥ 230
AT-25	25	+0.3/-0	≥ 240	≥ 295	≥ 325	≥ 395	150×150×8	≥ 230

Supporting high-strength tray						remark
HRB400		HRB500		HRB600
specification	Capacity	specification	Capacity	specification	Capacity
150×150×5	≥ 135	150×150×5	≥ 135			Selection of yield tube erical washer, damping nut etc is based on the design requirements
150×150×6	≥ 175	150×150×6	≥ 175	150×150×8	≥ 240
150×150×8	≥ 230	150×150×8	≥ 230	150×150×10	≥ 300
150×150×8	≥ 230	150×150×10	≥ 300	150×150×12	≥ 360
150×150×10	≥ 290	150×150×12	≥ 360	200×200×12	≥ 410