[1]黄庆享,贺雁鹏,李 锋,等.浅埋薄基岩大采高工作面顶板破断特征和来压规律[J].西安科技大学学报,2019,(05):737-744.[doi:10.13800/j.cnki.xakjdxxb.2019.0501]
 HUANG Qing-xiang,HE Yan-peng,LI Feng,et al.Site measurement on roof fracture and weighting feature in large mining height face in shallowly-buried thin bedrock coal mining[J].Journal of Xi’an University of Science and Technology,2019,(05):737-744.[doi:10.13800/j.cnki.xakjdxxb.2019.0501]
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浅埋薄基岩大采高工作面顶板破断特征和来压规律(/HTML)
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西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2019年05期
页码:
737-744
栏目:
出版日期:
2019-10-25

文章信息/Info

Title:
Site measurement on roof fracture and weighting feature in large mining height face in shallowly-buried thin bedrock coal mining
文章编号:
1672-9315(2019)05-0737-08
作者:
黄庆享12贺雁鹏12李 锋12王碧清3李 军3苗彦平3
(1.西安科技大学 能源学院,陕西 西安 710054; 2.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; 3.陕煤集团神木张家峁矿业有限公司,陕西 神木 719300)
Author(s):
HUANG Qing-xiang12HE Yan-peng12LI Feng12WANG Bi-qing3LI Jun3MIAO Yan-ping3
关键词:
浅埋煤层 薄基岩 大采高 覆岩运动 矿压显现 超前支承压力
Keywords:
shallow coal seam thin bedrock large mining height overlying strata movement ground pressure behavior front abutment pressure
分类号:
TD 32
DOI:
10.13800/j.cnki.xakjdxxb.2019.0501
文献标志码:
A
摘要:
为了揭示浅埋薄基岩大采高工作面顶板破断运动结构特征,在张家峁煤矿22201工作面辅运顺槽内施工3组钻孔,现场观测不同层位的顶板位移量,钻孔窥视顶板破断位置,实测统计对应的工作面支架工作阻力和超前支架工作阻力。结果表明:工作面上方顶板分层垮落,具有显著的时间和空间效应; 顶板破断超前于工作面来压,超前破断距离约15~20 m; 顶板冒落带高度15~18 m,平均顶板破断角65°; 初次来压形成非对称三铰拱结构,周期来压形成台阶岩梁结构; 端头区域内倾向不同层位的顶板呈弧形拱状冒落。工作面初次来压步距为32 m,来压时支架的平均工作阻力11 448 kN/架,周期来压步距为10~15.8 m,平均13 m,来压时支架的平均工作阻力10 343 kN/架,支架选型合理且利用率高; 回风顺槽侧超前支承压力显现较明显,超前支承压力峰值位于工作面前方5 m内,显著影响范围约为10 m,一般影响区为15 m.
Abstract:
In order to reveal the roof fracture feature in the large mining height face in shallowly-buried thin bedrock coal,three groups of holes are carried out in the auxiliary headgate in the 22201 working face of Zhangjiamao Coal Mine.The displacement of the roof in different levels has been monitored,the borescope inspection made to obtain the broken position of the roof,and the working resistance of the support measured as well as the front support during the working face.The research shows that:The roof is broken in a layered phenomenon,with significant time and space effects.The overlying strata break up ahead of the face weighting,with the distance of the advanced breaking being about 15~20 m; the roof caved height is 15~18 m,and the average breaking angle is 65.Asymmetric three-hinged arch structure is formed in the first weighting,and step rock beam structure in the periodic weighting.In addition,the roof in different layers is found to be caved in arc-shaped in T-junction.The first weighting interval is 32 m,and the average working resistance is 11 448 kN per support during the weighting; the periodic weighting interval is 10~15.8 m,averaging 13 m,and the average working resistance is 10 343 kN per support during the weighting,indicating a more reasonable selection of the support and a higher utilization rate.The front abutment pressure in tailgate side is more obvious,and the peak front abutment pressure is located within 5 m in front of the working face; the affected area is about 10 m,and the general one about 15 m.

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备注/Memo

备注/Memo:
收稿日期:2019-04-28 责任编辑:刘 洁基金项目:国家自然科学基金(51674190); 陕西省自然科学基础研究计划(2019JLP-08)通信作者:黄庆享(1966-),男,新疆沙湾人,教授,博士生导师,E-mail:361923187@qq.com
更新日期/Last Update: 2019-10-25