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bolt 1

bolt-clamped 1

bolt—cable 1

large span 1

longitudinal 1

model test 1

progressive failure 1

reducing span support 1

roadway 1

roof 1

semiconductor 1

slope 1

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Research on bolt-cable reducing span support technology in large span roadway of fully-mechanized coal

Zhu Yongjian,Luo Yixin,Zhang Daobing

Strategic Study of CAE 2010, Volume 12, Issue 3, Pages 51-55

Abstract:

Aiming at the locale facts of difficult roof controlling for large span gateway of fully-mechanized coal faces, based on analysis of the influence factors of monolayer strata stability, the numerical simulation soft UDEC3.0 is employed to deeply research influence factors and changing rules of roof stability of the gateway which is composed by some monolayer strata. A new supporting idea of reducing span supporting function by bolts cooperating with anchor cables is brought forward by disposing anchor cables at the appropriate locations, the traditional supporting theory such as suspensory and compounding beam (arch) are still operated at the same time. A good result is achieved after the new supporting idea is applied in the large span gateway of Bulianta Colliery in Shendong diggings.

Keywords： large span roadway roof bolt—cable reducing span support

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Ultrasonic linear motor using the L-B mode Langevin transducer with an exponential horn

SHI Shengjun, CHEN Weishan, LIU Junkao, ZHAO Xuetao

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 2, Pages 212-217 doi: 10.1007/s11465-008-0026-1

Abstract: linear motor is proposed and fabricated by using the longitudinal and bending vibration double mode bolt-clamped

Keywords： longitudinal vibration bolt-clamped semiconductor ultrasonic

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Experimental study on the progressive failure and its anchoring effect of weak-broken rock vertical slope

Hehua ZHU, Qianwei XU, Wenqi DING, Feng HUANG

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 2, Pages 208-224 doi: 10.1007/s11709-011-0111-0

Abstract: These tests can be divided into two categories, that is, with bolt reinforcement and without bolt reinforcementIn which, the stability of slope reinforced with different bolt diameter, different anchor length andThe contributions of bolt reinforcement are mainly reflected by the aspects of shear resistance, crack

Keywords： progressive failure weak-broken rock slope model test bolt