• 论文
主办单位:煤炭科学研究总院有限公司、中国煤炭学会学术期刊工作委员会
近距离煤层群井上下联合防突模式及其效果动态评价
  • Title

    Outburst prevention mode of ground and underground technology joint and its dynamic evaluation in contiguous coal seams

  • 作者

    程志恒陈亮苏士龙邹银辉张永将邹全乐姜黎明闫大鹤杜志峰王向东

  • Author

    CHENG Zhiheng1,3 ,CHEN Liang2 ,SU Shilong4 ,WANG Gongda5 ,ZOU Yinhui6 ,ZHANG Yongjiang6 , ZOU Quanle7 ,JIANG Liming2 ,YAN Dahe4 ,DU Zhifeng4 ,WANG Xiangdong4

  • 单位

    华北科技学院 安全工程学院煤炭科学技术研究院有限公司 安全分院华科中安科技(北京) 有限公司华晋焦煤有限责任公司中煤科工集团重庆研究院有限公司重庆大学 资源与环境科学学院

  • Organization
    1. School of Safety Engineering,North China Institute of Science and Technology,Beijing  101601,China; 2. Mine Safety Technology Branch,China Coal Research Institute,Beijing  100013,China; 3. Huake Zhongan Technology (Beijing) Co. ,Ltd. ,Beijing  102300,China; 4. Huajin Coking Coal Co. ,Ltd. , Lvliang  033000,China; 5. Civil and Resource Engineering School,University of Science and Technology Beijing  100083, China; 6. Chongqing Research In-stitute of China Technology & Engineering Group Corp. ,Chongqing  400037,China; 7. College of Resources and Environmental Sciences,Chongqing Universi-ty,Chongqing  400030,China
  • 摘要

    针对近距离煤层群缺乏系统有效井上下联合防突模式及动态评价方法的问题,以华晋焦煤沙曲一矿为工程背景,通过类似矿区突出信息统计分析得出其地应力-瓦斯潜能大、突出源分散、煤体强度及渗透性低的特点,采用理论分析,从多次采动应力叠加及高能卸压瓦斯运移两方面,揭示了煤层群叠加开采突出力能转移及启动机制,进而启发多煤层协同疏解突出潜能、“多煤层-区域-局部”逐级强化抽采的防突思路。

    采用系统分析及归纳演绎法优选集成了多煤层全时段的井上、下联合防突技术体系,即规划区采用常规井、防突压裂井与多分支水平井联合抽采降突;准备区采用地面井+被保护层定向长钻孔群或多分支水平井井孔对接抽采立体区域化抽采防突;生产区采用本煤层定向长钻孔群条带预抽+递进式大孔径钻孔抽采消突,松软低透煤层需增加可控冲击波、低压脉动水力致裂等疲劳损伤增透方法以强化消突效果,并通过现场试验确立其关键技术参数。

    同时,建立了该模式应用过程阶段递进式动态评价函数,给出三阶段中2级指标四参数随时间变化表达式,并确定各指标临界值。现场工程实践表明:① 沙曲一矿井上下联合消突模式在规划时间内基本实现上部2号,3+4号煤层协同消突;② 资源开采3阶段的煤炭转化率依次为95%,85%,90%,整体动态转化率为70.5%,说明抽掘采衔接相对紧张,主要是准备区抽采防突效率低;③ 矿井优质煤炭产能释放量增加约80万t和煤层气产能提升420万m3


  • Abstract
    In view of the lack of systematic and effective outburst prevention mode and dynamic evaluation method of combined surface and underground gas extraction in close distance coal seams,through statistical analysis of outburst information in coal-fields similar to Shaqu No. 1 coal mine,China,the characteristics of large in-situ stress gas poten- tial,scattered outburst sources and low coal strength and permeability are obtained. Using theoretical analysis, the stress-energy transfer and outburst start mechanism of coal seam mining are revealed from the aspects of stress super- position and relieving high-energy gas migration. Then,the outburst prevention ideas of multiple coal seam collabora- tive release potential and “ multiple coal seam-regional-local” step-by-step enhanced extraction are inspired. Surface and underground joint outburst prevention technological system is optimized and integrated by systematic analysis and inductive deduction. Combined surface and underground gas extraction,the conventional wells,outburst prevention and fracturing wells and multiple branch horizontal wells are combined to pump and reduce outburst in the far area. In the development area,the protective layer mining + directional long hole group or multi branch horizontal well hole doc- king extraction+directional long hole group three-dimensional regional extraction and outburst prevention are applied. In the production area,the directional long borehole group strip pre extraction+progressive large aperture borehole ex- traction are adopted to eliminate outburst. In soft and low permeable coal seam,the controllable shock wave,low-pres- sure pulsating hydraulic fracturing and other fatigue damage enhancement methods are needed to strengthen the effect of outburst elimination,and their key technical parameters are determined in field test. Meanwhile,the progressive dy- namic evaluation function of the application process stage of the model is established,the expressions of the four pa- rameters of the two-level indicators in the three stages with time are given,and the corresponding critical values are de- termined. Engineering practice results show that the surface and underground combined gas extraction and outburst elimination mode basically realizes the coordinated outburst elimination of the upper four coal seams in the planning time. The conversion rate of coal in the three stages of mining is 95% ,85% ,90% respectively,and the overall dynam- ic conversion rate is 70. 5% ,which shows that the connection between extraction and mining is relatively tight,mainly because the extraction and outburst prevention efficiency in the development area is low. After using this model,the output of high-quality CBM increased by 0. 8 million tons and 4. 2 million cubic meters.
  • 关键词

    近距离煤层群叠加开采力能转移模型优选集成井上下联合防突动态评价

  • KeyWords

    contiguous coal seams;superimposed mining;stress and energy transfer model;optimized and integrated; ground and underground technology joint on outburst prevention;dynamic evaluation

  • 基金项目(Foundation)
    国家重点研发计划资助项目(2017YFC0804206-002);国家“十三五”重大专项资助项目(2016ZX05067005-005);中煤科工集团科技创新基金资助项目(2019-TD-QN024)
  • DOI
  • Citation
    CHENG Zhiheng,CHEN Liang,SU Shilong,et al. Outburst prevention mode of ground and underground technology joint and its dynamic evaluation in contiguous coal seams [ J]. Journal of China Coal Society,2020,45 (5):1635 -1647.
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