yield-pillar system

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yield-pillar system [′yēld ¦pil·ər ‚sis·təm]

(mining engineering)

A method of roof control whereby the natural strength of the roof strata is maintained by the relief of pressure in working areas and the controlled transference of load to abutments which are clear of the workings and roadways.

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No references found			Yi Chong-Ok Yi Hwang Yi Ik Yi In-Jik Yi Ki-Yong Yi Kwang-Su Yi Kyu-Bo Yi Song-Gye Yi Sun-shin Yi Sun-Sin Yi Sung-Gi Yibin Yichang Yiddish Yiddish drama Yiddish language Yield yield factor yield monitor yield point yield rate yield strain yield strength yield stress yield temperature yield-pillar system yielding arches yielding floor yielding prop yig yig device yig filter yig-tuned parametric amplifier yig-tuned tunnel-diode oscillator Yijing Yildiz Kenter Yima Yin Yin and Yang Yin Fu yin-yang Yinchuan Ying Yingkou Yining YIQ ylang-ylang ylang-ylang oil ylem ylide YLISP			yield temperature Yield the Floor yield to yield to Yield to average life Yield to call Yield to call yield to current call Yield to First Yield to maturity Yield to maturity Yield to maturity yield to par call yield to put yield to put Yield to Redemption yield to the wishes of others Yield to Total Elation Yield to warrant call Yield to warrant expiration Yield to Worst Yield to Worst yield up yield up Yield, Current Yield-Based Option Yield-Based Options Yield-Curve Note Yield-Curve Notes Yield-Over-Clean yield-pillar system Yield-Spread Premium Yield-to-Average Life Yield-to-Call Yield-to-Current Call Yield-To-First Yield-to-Maturity Yield-to-Par Call Yield-to-Warrant Expiration Yield-to-Worst Yieldable Yieldance yielded yielded yielded yielded yielded yielded yielder yielder yielder yielder yielder yielder yielders yielders yielders yielders yielders yielding yielding

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