近距离冲击地压煤层开采遗留煤柱与断层复合影响下冲击危险性研究

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中文摘要：我国主要冲击地压矿井往往同时赋存多层可采煤层，多煤层协同安全开采是事关我国能源安全的重要课题。近距离冲击地压煤层开采时，上部煤层留设的煤柱承载了较高的上覆岩层载荷，给下部煤层开采带来了较大的风险。当遗留煤柱下发育断层时，该遗留煤柱导致的应力集中区与断层围岩附近的应力异常区产生的复合作用对工作面开采产生巨大影响。本文以陕西彬长大佛寺煤矿 40201工作面为研究对象，理论分析了上煤层遗留煤柱和断层复合作用对下部冲击地压煤层开采时冲击危险性的影响，采用地震波层析成像技术和微震监测技术，分别探明了遗留煤柱和断层复合作用下工作面围岩静载荷、动载荷分布规律。研究结果表明:煤层中的断层破碎带在上覆遗留煤柱作用下产生的静载荷集中区域会向断层两盘远处转移，使得断层更易发生滑移失稳;在遗留煤柱和断层的复合作用下，工作面"见方"区域来压早于理论预测结果，且来压强度增大;工作面动载显现以遗留煤柱下区域为主，遗留煤柱的存在增大了工作面超前支承压力的影响范围。本文研究可对类似条件下的冲击地压煤层开采提供一些借鉴。

外文标题：Investigation of burst risk under the combined effect of remnant coal pillar and fault in a mining condition of super-adjacent burst-prone coal seams

外文摘要：Multiple coal seams are often found in main burst-prone coal mines in China and thus safe mining of multiple coal seams are of great importance for the energy safety.Most of these coal seams are close to each other.In recent years,with the exhaustion of the upper coal seam mining.During the mining of super-adjacent burst-prone coal seams,the coal pillars left in the upper coal seam bear a higher overburden load,which brings a greater risk to the mining of the lower coal seam.When there is a fault under the remnant coal pillars,the combined effect of the stress concentration area caused by the remnant coal pillars and the stress anomaly area near the surrounding rock of the fault has a great influence on the mining of the working face.In this paper,the 40201 working face of Dafosi Coal Mine in Binchang City,Shaanxi Province is taken as the research object.The influence of the composite action of the remnant coal pillars and the fault on the impact risk of the lower rock burst-prone coal seam mining is theoretically analyzed.The seismic wave tomography technology and microseismic monitoring technology are used to explore the static load and dynamic load distribution law of the surrounding rock of the working face under the composite action of the remnant coal pillars and the fault.The results show that the static load concentration area generated by the fault fracture zone in the coal seam under the action of the overlying remnant coal pillars will transfer to the two sides of the fault,which makes the fault more prone to slip instability.Under the combined action of the remnant coal pillars and faults,the pressure of"square"area of the working face is earlier than the theoretical prediction results,and the pressure strength increases;the dynamic load behavior of the working face is mainly in the area under the remnant coal pillars,and the existence of the remnant coal pillars increases the influence range of the advance abutment pressure of the working face.The research can provide some reference for burst-prone coal seam mining under similar conditions.

外文关键词：

super-adjacent coal seamrock burstremnant coal pillarfaultseismic wave tomographymicroseismic monitoring

作者：

冯美华、赵森、闫耀东、郝电伟、李文帅、史庆稳

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作者单位：

中煤科工开采研究院有限公司,北京 101300

陕西彬长大佛寺矿业有限公司,陕西咸阳 713500

华北科技学院矿山安全学院,河北三河 065201

关键词：

近距离煤层冲击地压遗留煤柱断层地震波层析成像微震监测

基金：

国家自然科学基金面上项目国家自然科学基金面上项目廊坊市科技计划河北省自然科学基金中央高校基本科研业务费专项

项目编号：

52174186521741182023013164E20235080263142023079

出版年：

2024

DOI：

10.12075/j.issn.1004-4051.20240300

中国矿业

中国矿业联合会

中国矿业

CSTPCD北大核心

影响因子：0.875

ISSN：1004-4051

年,卷(期)：2024.33(6)

参考文献量25