Study of formation mechanism of floor heave at goaf side of roadway and prevention technology

CHU Ming-xiang; WANG Qing-biao; XIA Jun-min

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Study of formation mechanism of floor heave at goaf side of roadway and prevention technology

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- Study of formation mechanism of floor heave at goaf side of roadway and prevention technology
- Vol. 32, Issue S2, (2011)
- 作者机构：
  
  山东科技大学资源与土木工程系,山东,泰安,271019
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU433
- Online First：26 August 2011，
  
  Published：2011
- 稿件说明：
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CHU Ming-xiang, WANG Qing-biao, XIA Jun-min. Study of formation mechanism of floor heave at goaf side of roadway and prevention technology[J]. 2011, 32(S2).
DOI：

CHU Ming-xiang, WANG Qing-biao, XIA Jun-min. Study of formation mechanism of floor heave at goaf side of roadway and prevention technology[J]. 2011, 32(S2). DOI：

摘要

煤矿深部采空侧巷道底鼓现象日趋普遍和严重，严重影响巷道的运输和正常使用，其底鼓防治技术研究已成为目前煤矿岩石力学问题研究的重点。通过理论分析、数值模拟、现场试验等研究方法，对采空侧巷道底鼓的特征、形成原因、形成机制及其防治技术进行了详细研究，得到以下结论：（1）采空侧巷道底鼓与底板岩性和底板岩层的应力重新分布有关；（2）底板在严重挤压变形的情况下发生断裂，底板隆起，墙角发生外移是造成底鼓的主要原因；（3）底鼓始于巷道底角与底板中部；（4）采用中空锚杆注浆与高强锚杆锚注联合支护技术能有效治理采空侧巷道的底鼓

Abstract

The floor heave of deep goaf side coal roadway has bocome increasingly common and serious phenomenon; it has important affection on carriage and normal use of roadway

and the prevention technology research of the floor heave has become the key of coal mine rock mechanics problems at present. Through theoretical analysis

numerical simulation and field tests

a detailed search has been done on the floor heave characteristic of goaf side of roadway

the formation reasons

the formation mechanism and control technology. It is concluded as follows. (1) The floor heave of goaf side has some connection with the floor lithologic and floor strata stress distribution. (2) The roadway floor ruptures、uplifts and the floor corner moving outward in serious circumstances are the major cause of the floor heave formation. (3) The floor heave starts at the floor corner and the central part of roadway. (4) Using the hollow bolt grouting and high-strength bolt jointed support technology can control effectively the floor heave of goaf side of roadway.

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