[1]解盘石,段建杰,皇甫靖宇,等.大倾角多区段开采顶板运移及其采空区充填规律实验研究[J].西安科技大学学报,2020,(02):212-220.
 XIE Pan-shi,DUAN Jian-jie,HUANGFU Jing-yu,et al.Experiment study on roof movement and its filling in multi-section mining of steeply dipping seam[J].Journal of Xi'an University of Science and Technology,2020,(02):212-220.
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大倾角多区段开采顶板运移及其采空区充填规律实验研究(/HTML)
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西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2020年02期
页码:
212-220
栏目:
出版日期:
2020-03-30

文章信息/Info

Title:
Experiment study on roof movement and its filling in multi-section mining of steeply dipping seam
文章编号:
1672-9315(2020)02-0212-09
作者:
解盘石12段建杰12皇甫靖宇12田双奇12
(1.西安科技大学 西部矿井开采及灾害防治教育部重点实验室,陕西 西安 710054; 2.西安科技大学 能源学院,陕西 西安 710054)
Author(s):
XIE Pan-shi12DUAN Jian-jie12HUANGFU Jing-yu12TIAN Shuang-qi12
(1.Key Laboratory of Western Mine Exploitation and Hazard Prevention,Ministry of Education,Xi'an University of Science and Technology,Xi'an 710054,China; 2.College of Energy Science and Engineering,Xi'an University of Science and Technology,Xi'an 710054,China)
关键词:
大倾角煤层 多区段开采 顶板运移 二次扰动 非均匀充填
Keywords:
steeply dipping coal seam multi-section mining roof movement second mining disturbance non-uniform filling
分类号:
TD 325
文献标志码:
A
摘要:
为了研究大倾角煤层多区段开采围岩运移规律,采用物理相似模拟实验方法,分析了大倾角煤层多区段采场顶板和煤柱变形破坏规律、底板应力分布及演化规律、垮落矸石充填特征等。结果表明:大倾角煤层多区段开采围岩运移规律不同于单区段开采,下区段采动导致上区段采场倾向中、上部垮落顶板出现二次下沉和滑移,顶板运移曲线呈现沿倾斜方向“上大下小”的双峰特点,垮落顶板非均匀充填导致采空区底板应力沿倾向呈现出中部>下部>上部,下区段采动导致上区段采空区中部底板应力显著增加。下区段开采致使区段煤柱上、下两侧非对称受载并发生破坏,引发了煤柱-上区段采场煤岩体的连锁运动; 区段煤柱支承压力从上区段开采时的“W”型分布变为下区段开采时的“V”型分布,增载系数达到4.9.研究可为大倾角煤层多区段围岩控制提供了理论指导。
Abstract:
In order to study the multi-slope overburden migration law of steeply dipping coal seam,the physical similarity simulation experiment method was used to analyze the roof and coal pillar movement of the multi-slope mining in the steeply dipping seam,the stress distribution and evolution of the floor,and the filling characteristics of the collapsed gangue.The results show that the migration law of surrounding rock in multi-section mining of steeply dipping coal seam is different from that of single section mining,the lower section mining leads to secondary subsidence and slippage of the upper and middle collapsed roof in the upper section working face along the incline direction,the roof movement curve shows the double peak characteristic of “upper and lower” in the oblique direction.The non-uniform filling of collapsed roof leads to the tendency of floor stress along the goaf to show the middle part>the lower part>the upper part.,and the mining in the lower section causes the floor stress of the middle goaf in the upper section to increase again.The mining of the lower section caused the upper and lower sides of the section coal pillar to be asymmetrically loaded and destroyed,which triggered the chain movement of the coal pillar-upper section working face coal and rock mass.The section coal pillar abutment pressure changes from the “W” type distribution in the upper section mining to the “V” type distribution in the lower section mining,and the dynamic load coefficien reaches 4.9.The study can provide theoretical guidance for multi-section surrounding rock control in steeply dipping seams.

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备注/Memo

备注/Memo:
收稿日期:2020-01-11 责任编辑:刘 洁
基金项目:国家自然科学基金(51774230,51634007); 陕西省创新能力支撑计划(科技创新团队)(2018TD-038); 西安科技大学学科高峰计划项目(2018GG-2-07)
通信作者:解盘石(1981-),男,陕西三原人,副教授,硕士生导师,E-mail:tay584@qq.com
更新日期/Last Update: 2020-03-30