激光位移监测恒阻大变形锚杆 SHTB试验研究

doi:10.13722/j.cnki.jrme.2018.0676

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Abstract

The constant resistance and large deformation bolt(CRLD bolt) which working resistance is 130 kN and has widely been used as rock support in longwall mining based on gob-side entry retaining without coal pillar(110 mining method) was selected as the sample. In order to investigate it′s dynamic response characteristics，the SHTB tests were carried out on the modified SHTB system which modified by HE Manchao. In the test，quartz piezoelectric force sensor and laser displacement sensor were used to monitor the impact force and impact displacement response of the CRLD bolt at different impact speeds. The test results show that，under the impact load，the impact force and the elongation speed of the bolt both reach the peaks within 0.5 ms，and the CRLD bolt can respond rapidly to the impact. Under different impact velocities，the impact force and deformation velocity of CRLD bolt are both a fluctuation which going through a time developing process. The deformation of large deformation bolt with constant resistance is a process of elastic-slip-elastic recovery.

Key words： rock mechanics CRLD bolt SHTB test laser displacement monitoring system

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	Articles by authors
	GONG Weili1
	2
	ZHANG Zixiang1
	2
	GAO Xia1
	2
	HE Manchao1
	2
	SUN Yaxing1
	2

Cite this article:

GONG Weili1,2,ZHANG Zixiang1, et al. SHTB experiment study of CRLD bolt under the monitoring by laser displacement sensor[J]. , 2018, 37(S2): 3926-3937.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2018.0676 OR https://rockmech.whrsm.ac.cn/EN/Y2018/V37/IS2/3926

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