尖角煤柱影响下旋采面冲击地压危险分析与防治

doi:10.16265/j.cnki.issn1003-3033.2020.08.023

中国安全科学学报 ›› 2020, Vol. 30 ›› Issue (8): 158-163.doi: 10.16265/j.cnki.issn1003-3033.2020.08.023

尖角煤柱影响下旋采面冲击地压危险分析与防治

吕鹏飞¹ 讲师, 张显荣², 邱林¹, 陈光波¹ 讲师, 王二雨¹ 讲师

1 内蒙古科技大学矿业研究院,内蒙古包头 014010;
2 陕西未来能源化工有限公司,陕西榆林 719000

收稿日期:2020-05-02 修回日期:2020-07-02 出版日期:2020-08-28 发布日期:2021-07-15
作者简介:吕鹏飞 (1989—),男,辽宁阜新人,博士,讲师,硕士生导师,主要从事冲击地压防治相关的教学与科研工作。E-mail:2018930@imust.edu.cn。
基金资助:
国家自然科学基金青年基金资助(51304110);内蒙古自然科学基金联合基金资助(2019LH05005);内蒙古科技大学创新基金资助(2019QDL-B32)。

Rock burst risk analysis and prevention in rotary working face under influence of sharp corner coal pillar

LYU Pengfei¹, ZHANG Xianrong², QIU Lin¹, CHEN Guangbo¹, WANG Eryu¹

1 Mining Research Institute, Inner Mongolia University of Science and Technology, Baotou Inner Mongolia 014010, China;
2 Shaanxi Future Energy Chemical Co., Ltd., Yulin Shaanxi 719000, China

Received:2020-05-02 Revised:2020-07-02 Online:2020-08-28 Published:2021-07-15

摘要/Abstract

摘要： 为预防复杂开采条件工作面冲击地压灾害,以尖角煤柱与旋转开采耦合条件工作面为研究背景,从冲击倾向、地质构造、地应力、坚硬顶板、旋转开采与尖角煤柱等角度分析冲击地压发生的影响因素,基于数值模型研究工作面采动应力演化特征,得出工作面冲击危险区域及程度,并提出相应的防治措施。结果表明:连续的尖角煤柱具备较高的应力集中条件且会产生应力累积效应,工作面冲击地压危险区域主要集中在旋转之前和旋转中,其中旋转开采部分运输巷受断层、矿界煤柱与旋转开采影响具有强冲击危险,旋转开采部分轨道巷受尖角煤柱与旋转开采影响具有强冲击危险。工作面旋转区、尖角煤柱区分别采用降低开采扰动强度、静载卸压的方式防治冲击地压的发生。

关键词: 尖角煤柱, 旋采面, 冲击地压, 采动应力, 防治技术

Abstract: In order to prevent rock burst disaster of working face under complex conditions, with working face featuring coupling of sharp corner coal pillar and rotary mining as research background, influencing factors of rock burst were analyzed from aspects of burst proneness, geological structure, in-suit stress, hard roof, rotary mining and sharp corner pillars. Then, mining stress evolution characteristics in working face were studied based on numerical simulation. Finally, dangerous areas and degree were obtained and prevention measures were put forward accordingly. The results indicate that continuous sharp corner coal pillars have higher stress concentration condition and generate stress accumulation effect. Dangerous areas are mainly before and during working face rotation. Transportation roadway has strong rock burst risk due to impact of fault, boundary coal pillar and rotary mining while tail entry has it due to that of sharp corner pillar and rotary mining. Rock burst can be prevented in rotary mining area and sharp corner coal pillar respectively through reducing mining intensity and reliving pressure statically.

Key words: sharp corner coal pillar, rotary working face, rock burst, mining stress, control technique

中图分类号:

X936

吕鹏飞, 张显荣, 邱林, 陈光波, 王二雨. 尖角煤柱影响下旋采面冲击地压危险分析与防治[J]. 中国安全科学学报, 2020, 30(8): 158-163.

LYU Pengfei, ZHANG Xianrong, QIU Lin, CHEN Guangbo, WANG Eryu. Rock burst risk analysis and prevention in rotary working face under influence of sharp corner coal pillar[J]. China Safety Science Journal, 2020, 30(8): 158-163.

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尖角煤柱影响下旋采面冲击地压危险分析与防治

Rock burst risk analysis and prevention in rotary working face under influence of sharp corner coal pillar

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