硬岩采场新型预应力膨胀支柱的研发及应用

doi:10.12068/j.issn.1005-3026.2021.02.010

东北大学学报（自然科学版） ›› 2021, Vol. 42 ›› Issue (2): 213-219.DOI: 10.12068/j.issn.1005-3026.2021.02.010

硬岩采场新型预应力膨胀支柱的研发及应用

李坤蒙，李元辉，王者超，熊志朋

(东北大学深部金属矿山安全开采教育部重点实验室，辽宁沈阳110819)

收稿日期:2020-05-14 修回日期:2020-05-14 接受日期:2020-05-14 发布日期:2021-03-05
通讯作者: 李坤蒙
作者简介:李坤蒙(1990-)，男，陕西西安人，东北大学博士后研究人员；李元辉(1968-)，男，辽宁营口人，东北大学教授，博士生导师；王者超(1980 -)，男，山东高唐人，东北大学教授，博士生导师.
基金资助:
国家重点研发计划项目(2018YFC0604601，2018YFC0604405)；国家青年科学基金资助项目(52004054)；国家自然科学基金资助项目(51874068)；辽宁省“兴辽英才计划”项目(XLYC1805008).

Development and Application of a New Pre-stressed Expandable Pillar in Hard Rock Stope

LI Kun-meng， LI Yuan-hui， WANG Zhe-chao， XIONG Zhi-peng

Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines， Northeastern University， Shenyang 110819， China.

Received:2020-05-14 Revised:2020-05-14 Accepted:2020-05-14 Published:2021-03-05
Contact: LI Yuan-hui
About author:-
Supported by:
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摘要/Abstract

摘要： 针对硬岩采场原岩矿柱损失率高、传统人工矿柱无法有效接顶等难题，利用自主研制的膨胀材料水化反应后体积增大特性，研发一种新型预应力膨胀支柱;基于室内和现场工业试验，测定其膨胀力学性能和承载机制.试验结果表明，桶式膨胀装置(即膨胀支护动力源)在约束条件下，随着膨胀材料装填量的增加，其主动支撑力增加，且增幅逐渐加大;在全约束且满装膨胀材料的条件下，主动支撑力可达500kN.预应力膨胀支柱具有架设周期短(约4h)、主动支撑力大(约600kN)的优点;在房柱法残留矿柱回收过程中，预应力膨胀支柱呈现出应变硬化承载特性，原岩矿柱的负载能够成功地转移至预应力膨胀支柱之上;在确保顶板安全的条件下，试验采场经济效益增加170万元.

关键词: 膨胀支柱;主动支撑;应变硬化;矿柱回收;承载机制

Abstract: In order to solve the problems of high loss rate of natural pillars and the inability of traditional artificial pillars to effectively contact roof in hard rock stope， a new pre-stressed expandable pillar was developed by using the volume increase characteristic of the self-developed expandable material after hydration reaction. Based on the laboratory and field industrial tests， the mechanical properties and load bearing mechanism were determined. The test results showed that with the increase of the amount of expandable material in the barrel-type expandable device under constrained conditions， its active support stress increased with a gradually increased increment， and it could reach 500kN under the conditions of full constraint and fully filled with expandable material. The pre-stressed expandable pillar had the advantages of short construction period(about 4h) and large active support stress(about 600kN). When recovering residual pillars in the room-and-pillar mining， the pre-stressed expandable pillars showed strain-hardening bearing characteristics， and the load on natural pillars was successfully transferred to the artificial expandable pillars. Under the conditions of ensuring the stope safety， economic benefit of the test stope increased by 1，700，000 CNY.

Key words: expandable pillar; active support; strain-hardening; pillar recovery; bearing mechanism

中图分类号:

TD355

李坤蒙，李元辉，王者超，熊志朋. 硬岩采场新型预应力膨胀支柱的研发及应用[J]. 东北大学学报（自然科学版）, 2021, 42(2): 213-219.

LI Kun-meng， LI Yuan-hui， WANG Zhe-chao， XIONG Zhi-peng. Development and Application of a New Pre-stressed Expandable Pillar in Hard Rock Stope[J]. Journal of Northeastern University(Natural Science), 2021, 42(2): 213-219.

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硬岩采场新型预应力膨胀支柱的研发及应用

Development and Application of a New Pre-stressed Expandable Pillar in Hard Rock Stope

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