煤岩体应力动态监测系统开发及应用

doi:10.13722/j.cnki.jrme.2017.0175

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Abstract

Stress of coal and rock provides important basis for supporting design of mine，strata stress analysis，rock burst and other dynamic disasters prediction and prevention. In order to measure the stresses of coal and rock in various directions and obtain their evolution laws，stress sensors within three directions and dynamic stress monitoring system of coal and rock are developed. The chip set on the stress sensor can effectively couple with coal and rock，and the stress can be measured by the flexible deformation of sensor chip and oil pressure. By this monitoring system，the stresses of coal and rock in various directions can be monitored continuously in real time. And this system was applied to mine stress monitoring and its evolution laws analysis. The results showed that the stress distribution of surrounding roadway and it′s evolution laws，the stress relief region，the stress concentration range and degree could be gained through multi-points arrangement. According to the measured results，the normal stress distribution laws inside coal mass of the roadway were gained in three perpendicular directions，which displayed that the stress variation trend of every point coincided，but the normal stress of various directions about the same point was not synchronous. It revealed there were two stress relief and concentration regions beside the roadway. This system provides effective means and methods for directional monitoring coal and rock stress，which can be used to the analysis of mine stress，the monitoring of surrounding rock stability and early warning of rock burst and other dynamic disasters.

Key words： rock mechanics directional monitoring sensors stress anisotropy coal and rock mass

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	Articles by authors
	WANG Enyuan1
	2
	3
	XU Wenquan4
	HE Xueqiu3
	5
	SHEN Rongxi1
	2
	3
	KONG Xiangguo1
	2
	3

Cite this article:

WANG Enyuan1,2,3, et al. Development and application of dynamic stress monitoring system for coal and rock mass[J]. , 2017, 36(S2): 3935-3942.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2017.0175 OR https://rockmech.whrsm.ac.cn/EN/Y2017/V36/IS2/3935

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