[1]陈建强,来兴平,崔 峰,等.急倾斜特厚煤层耦合致裂与破碎工艺研发及应用[J].西安科技大学学报,2015,(02):139-143.[doi:10.13800/j.cnki.xakjdxxb.2015.0201]
 CHEN Jian-qiang,LAI Xing-ping,CUI Feng,et al.Research and application of the coupled crack and crush technology for steeply dipping extra-thick coal seam[J].Journal of Xi'an University of Science and Technology,2015,(02):139-143.[doi:10.13800/j.cnki.xakjdxxb.2015.0201]
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急倾斜特厚煤层耦合致裂与破碎工艺研发及应用(/HTML)
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西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2015年02期
页码:
139-143
栏目:
出版日期:
2015-03-10

文章信息/Info

Title:
Research and application of the coupled crack and crush technology for steeply dipping extra-thick coal seam
文章编号:
1672-9315(2015)02-0139-05
作者:
陈建强1来兴平23崔 峰23雷兆源23王宁波14漆 涛1曹建涛23单鹏飞23
1.神华新疆能源有限责任公司,新疆 乌鲁木齐 830027;
2.西安科技大学 能源学院,陕西 西安 710054;
3.教育部西部矿井开采及灾害防治重点实验室,陕西 西安 710054;
4.中国矿业大学 矿业工程学院,江苏 徐州 221116
Author(s):
CHEN Jian-qiang1LAI Xing-ping23CUI Feng23LEI Zhao-yuan23 WANG Ning-bo14QI Tao1CAO Jian-tao23SHAN Peng-fei23
1.Shenhua Xinjiang Energy Co.,Ltd.,Urumqi 830027,China;
2.College of Energy Science and Engineering,Xi'an University of Science and Technology,Xi'an 710054,China;
3.Key Laboratory of Western Mine Exploitation and Hazard Prevention of Ministry of Education,Xi'an 710054,China;
4.School of Mining Engineering,China University of Mining and Technology,Xuzhou 221116,China
关键词:
急倾斜特厚煤层 耦合致裂与破碎 声发射 裂隙扩展与转异 光学观测
Keywords:
steep and extra-thick coal seam coupled-crack acoustic emission(AE) crack extend optical acquisitions
分类号:
TD 322; TD 353
DOI:
10.13800/j.cnki.xakjdxxb.2015.0201
文献标志码:
A
摘要:
水压致裂(hydraulic fracturing,HF)与预爆破(pre-split-blasting,PSB)是有效致裂坚硬煤岩体和促进安全开采的技术手段。其存在压裂效果差、润湿周期长、致裂方向、大小与范围有限和易诱发灾害等。针对急倾斜特厚煤层破碎难题,通过理论分析、数值计算、模型实验和现场应用等方法,揭示弱碱性石灰水耦合致裂与破碎机制。基于声发射(Acoustic emission,AE)观测与裂隙光学捕获(Crack Activity Optical Acquiisitions,CAOA)技术方法,揭示了煤岩体裂隙萌生扩展与转异规律。对比分析表明,在煤岩体体积膨胀中产生明显侧向压力,显著促进煤岩体裂隙扩展演化,裂隙扩展速度呈现先增后降趋势。应用实践表明,顶煤破碎度、冒放性和回采率显著提高,开采环境明显改善,这对急倾斜煤层安全高效开采与环境安全具有科学与工程应用价值。
Abstract:
Hydraulic fracturing(HF)and pre-split blasting are available methods for coal-rock fracturing,but they present inadequate fracturing effect,long period wet-ability,the limitations of fracturing orientation and magnitude and range,easily inducing calamity,etc.Aimed at the problem of steep coal-rock fracturing and cracking,we applied theoretical analysis,numerical computation,model material experiment,acoustic emission(AE)and crack activity optical acquisitions(CAOA),the alkalescent limewater-surfactant solutions were proposed as base-material with coal seam fracturing.The multi-element compositing mechanism on static fracturing and crack method indicated that regularity ofthe internal crack conceiving,extending and evolution of specimens during static fracturing and crack.The analysis results manifested that the lateral swelling pressure emerged obviously in the process of hardening and inflating,and enhanced the internal crack extensibility and evolution.The trend of crack extensibility speed was rising and then declining,these had scientific and engineering application value for steep coal seam safe and efficient mining.

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备注/Memo

备注/Memo:
基金项目:973计划前期专项(2014CB260404); 973国家重点基础研究发展计划(2015CB251600); 国家自然科学基金(煤炭联合基金)重点项目(U13612030); 西安科技大学博士(后)启动金(2014QDJ070); 新疆自治区高新技术计划(201432102)和陕西省重点科技创新团队计划(2013KCT-16) <
通讯作者:陈建强(1970-),男,山东临沂人,高级工程师,E-mail:499234655@qq.com
更新日期/Last Update: 2015-03-15