特厚煤层大采高综放自动化开采技术与装备
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摘要
针对我国西部矿区坚硬特厚煤层综放自动化开采技术难题,研究了大采高综放工作面液压支架与围岩耦合作用关系,分析了坚硬特厚煤层顶煤冒放结构及液压支架合理工作阻力确定方法,研发了液压支架与围岩智能耦合控制系统及自动化放顶煤控制系统,实现了大采高综放工作面自动化开采。基于坚硬特厚煤层大采高综放液压支架与围岩耦合作用关系,建立了坚硬顶煤冒放的"悬臂梁"模型及顶板岩层结构失稳的"组合悬臂梁"模型,揭示了大采高综放工作面合理机采高度确定方法及合理液压支架工作阻力确定方法。通过分析两柱强力液压支架的承载特性,创新设计了大采高综放液压支架三级高效强扰动放煤机构,研发了综放液压支架智能耦合控制系统,实现了对液压支架姿态与受力状态的实时监测。基于大采高综放工作面分段多窗口多轮放煤工艺的时序控制自动化放煤逻辑关系,研发了自动化放煤控制装置,实现了坚硬特厚煤层大采高综放工作面安全、高效、高回采率自动化开采。
In view of the technical difficulties of fully mechanized top coal caving mining in the hard and thick seam in mining areas of western China, we studied the coupling between hydraulic support and surrounding rock for fully mechanized top coal caving face with large mining height,analyzed the roof coal caving structure and the determination method of hydraulic support working resistance, developed the intelligent support-rock coupling control system and automatic top coal caving control system,realizing automatic mining of fully mechanized top coal caving mining face with large mining height. Based on the coupling relationship between hydraulic support and surrounding rock of the fully mechanized top coal caving mining face in hard and ultra-thick seam,we established the of cantilever beam model for hard top coal caving and the combined cantilever beam model of roof strata structure instability,and then proposed the determination method of reasonable mining height for high fully mechanized caving face and reasonable working resistance of hydraulic support. By analyzing the bearing characteristics of the two-leg strong hydraulic support, we innovatively designed a three-stage high efficiency and strong perturbation coal caving mechanism with large mining height, and developed the intelligent coupling control system of the hydraulic support, realizing real-time monitoring of support posture and stress status. Based on the logical relationship for timing control of automatic coal caving using multi-window and multi-turn coal caving technology in the fully-mechanized top coal caving face,an automatic coal caving control device was developed to realize the safe,efficient,high recovery rate and automated mining of fully mechanized top coal caving mining face in the hard and thick coal seam.
In view of the technical difficulties of fully mechanized top coal caving mining in the hard and thick seam in mining areas of western China, we studied the coupling between hydraulic support and surrounding rock for fully mechanized top coal caving face with large mining height,analyzed the roof coal caving structure and the determination method of hydraulic support working resistance, developed the intelligent support-rock coupling control system and automatic top coal caving control system,realizing automatic mining of fully mechanized top coal caving mining face with large mining height. Based on the coupling relationship between hydraulic support and surrounding rock of the fully mechanized top coal caving mining face in hard and ultra-thick seam,we established the of cantilever beam model for hard top coal caving and the combined cantilever beam model of roof strata structure instability,and then proposed the determination method of reasonable mining height for high fully mechanized caving face and reasonable working resistance of hydraulic support. By analyzing the bearing characteristics of the two-leg strong hydraulic support, we innovatively designed a three-stage high efficiency and strong perturbation coal caving mechanism with large mining height, and developed the intelligent coupling control system of the hydraulic support, realizing real-time monitoring of support posture and stress status. Based on the logical relationship for timing control of automatic coal caving using multi-window and multi-turn coal caving technology in the fully-mechanized top coal caving face,an automatic coal caving control device was developed to realize the safe,efficient,high recovery rate and automated mining of fully mechanized top coal caving mining face in the hard and thick coal seam.
引文
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[14]陈忠辉,冯竞竞,肖彩彩,等.浅埋深厚煤层综放开采顶板断裂力学模型[J].煤炭学报,2007,32(5):449-452.
[15]庞义辉,王国法.坚硬特厚煤层顶煤冒放结构及提高采出率技术[J].煤炭学报,2017,42(4):817-824.
[16]王国法,刘俊峰,任怀伟.大采高放顶煤液压支架围岩耦合三维动态优化设计方法[J].煤炭学报,2011,36(1):145-151.
[17]王国法.两柱掩护式放顶煤液压支架设计研究[J].煤炭科学技术,2003,31(4):36-38.
[18]张良,牛剑峰,代刚,等.综放工作面煤矸自动识别系统设计及应用[J].工况自动化,2014,40(9):121-124.
[2]张顶立,何佐德,董伟君,等.坚硬特厚煤层分层综放开采关键技术研究[J].岩石力学与工程学报,2002,21(2):273-279.
[3]张西斌,周刚,刘志文,等.特厚煤层分层综放开采工艺技术研究[J].煤炭科学技术,2013,41(7):38-42.
[4]王国法,吴兴利,庞义辉.千万吨矿井群安全高效可持续开发关键技术[J].煤炭工程,2015,47(10):1-4,8.
[5]刘长友,杨敬轩,于斌,等.覆岩多层坚硬顶板条件下特厚煤层综放工作面支架阻力确定[J].采矿与安全工程学报,2015,32(1):7-13.
[6]王家臣,张锦旺.综放开采顶煤放出规律的BBR研究[J].煤炭学报,2015,40(3):487-493.
[7]王家臣,魏立科,张锦旺,等.综放开采顶煤放出规律三维数值模拟[J].煤炭学报,2013,38(11):1905-1911.
[8]王国法,庞义辉.液压支架与围岩耦合作用关系[J].煤炭学报,2015,40(1):30-34.
[9]王国法.工作面支护与液压支架技术理论体系[J].煤炭学报,2014,39(8):1593-1601.
[10]王国法,刘俊峰,李政,等.放顶煤液压支架与综采放顶煤技术[M].北京:煤炭工业出版社,2010.
[11]王国法,庞义辉,刘俊峰.特厚煤层大采高综放开采机采高度的确定与影响[J].煤炭学报,2012,37(11):1777-1782.
[12]董国华,王世东,王晓蕾.浅埋中硬特厚煤层综放工作面覆岩运动破坏规律研究[J].煤炭工程,2014,46(7):85-88.
[13]解兴智,赵铁林.浅埋坚硬特厚煤层综放开采顶煤冒放结构分析[J].煤炭学报,2016,41(2):1197-1204.
[14]陈忠辉,冯竞竞,肖彩彩,等.浅埋深厚煤层综放开采顶板断裂力学模型[J].煤炭学报,2007,32(5):449-452.
[15]庞义辉,王国法.坚硬特厚煤层顶煤冒放结构及提高采出率技术[J].煤炭学报,2017,42(4):817-824.
[16]王国法,刘俊峰,任怀伟.大采高放顶煤液压支架围岩耦合三维动态优化设计方法[J].煤炭学报,2011,36(1):145-151.
[17]王国法.两柱掩护式放顶煤液压支架设计研究[J].煤炭科学技术,2003,31(4):36-38.
[18]张良,牛剑峰,代刚,等.综放工作面煤矸自动识别系统设计及应用[J].工况自动化,2014,40(9):121-124.