含夹矸厚煤层大采高仰采煤壁破坏机理与注浆加固技术
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摘要
详细分析了煤壁破坏的一般机理,结合邢台东庞矿2612大采高工作面实际,总结了煤壁破坏的主要形式,建立了大采高仰采工作面含有夹矸煤层煤壁破坏的力学模型,得出了顶板压力、夹矸厚度、仰采角度、煤体内聚力等对煤壁稳定性有较大影响,其中缓解煤壁的顶板压力是防止煤壁破坏的最有效措施。通过理论分析、UDEC数值模拟等研究了夹矸煤层煤壁注浆加固的合理钻孔位置和参数,得出最佳的布孔位置是注浆孔要和煤壁破坏的起坏点位置一致。同时介绍了2612大采高工作面实际的煤壁注浆工艺和实施效果。
In this paper, the general mechanism of rib spalling was analyzed in detail, the main failure form of coal wall was summarized combined with the real conditions of 2612 coal face in Dongpang Mine, and the mechanical model of rib spalling in topple mining face with large mining height was established. The results show that the roof pressure, dirt band thickness, topple mining angle, coal cohesion, et al, have a great influence on the coal wall stability, and relieving the roof pressure of coal wall is the most effective measure to prevent coal wall failure. Meanwhile, the reasonable drilling position and grouting reinforcement parameters of coal seam with dirt band were studied by theoretical analysis, UDEC numerical simulation, etc. The studies show that the grouting holes drilled in the breakdown point of rib spalling is the best solution. In addition, the coal wall grouting process and implementation effect in 2612 coal face with large mining height was introduced.
In this paper, the general mechanism of rib spalling was analyzed in detail, the main failure form of coal wall was summarized combined with the real conditions of 2612 coal face in Dongpang Mine, and the mechanical model of rib spalling in topple mining face with large mining height was established. The results show that the roof pressure, dirt band thickness, topple mining angle, coal cohesion, et al, have a great influence on the coal wall stability, and relieving the roof pressure of coal wall is the most effective measure to prevent coal wall failure. Meanwhile, the reasonable drilling position and grouting reinforcement parameters of coal seam with dirt band were studied by theoretical analysis, UDEC numerical simulation, etc. The studies show that the grouting holes drilled in the breakdown point of rib spalling is the best solution. In addition, the coal wall grouting process and implementation effect in 2612 coal face with large mining height was introduced.
引文
[1]王家臣.厚煤层开采理论与技术[M].北京:冶金工业出版社,2009:30-34.
[2]方新秋,何杰,李海潮.软煤综放面煤壁片帮机理及防治研究[J].中国矿业大学学报,2009,38(5):640-644.FANG Xinqiu,HE Jie,LI Haichao.A study of the rib fall mechanism in soft coal and its control at a fully mechanized top coal caving face[J].Journal of China University of Mining&Technology,2009,38(5):640-644.
[3]YUAN Yong,TU Shihao,WU Q,et al.Mechanics of rib spelling of high coal walls under fully mechanized mining[J].Mining Science and Technology,2011,21(1):129-133.
[4]袁永,屠世浩,马小涛,等.“三软”大采高综采面煤壁稳定性及其控制研究[J].采矿与安全工程学报,2012,29(1):22-25.YUAN Yong,TU Shihao,MA Xiaotao,et al.Coal wall stability of fully mechanized working face with great mining height in“three soft”coal seam and its control technology[J].Journal of Mining&Safety Engineering,2012,29(1):22-25.
[5]尹希文,闫少宏,宁宇.用压杆理论分析大采高综采面煤壁片帮特征[J].采矿与安全工程学报,2008,25(2):222-225.YIN Xiwen,YAN Shaohong,NING Yu.Characters of the rib spelling in fully mechanized caving face with great mining height[J].Journal of Mining&Safety Engineering,2008,25(2):222-225.
[6]于新锋,柏建彪.张集矿综采工作面破碎煤壁注浆加固技术研究[J].煤炭科学技术,2006,34(2):69-71.YU Xinfeng,BAI Jianbiao.Research on grouting reinforced technology for broken coal wall of fully mechanized longwall mining face in Zhangji mine[J].Coal Science and Technology,2006,34(2):69-71.
[7]王家臣.极软厚煤层煤壁片帮与防治机理[J].煤炭学报,2007,32(8):785-788.WANG Jiachen.Mechanism of the rib spalling and the controlling in the very soft coal seam[J].Journal of China Coal Society,2007,32(8):785-788.
[8]赵彭年.松散介质力学[M].北京:地震出版社,1995:12-16.
[9]张天宝.土坡稳定性分析和土工建筑物的边坡设计[M].成都:成都科技大学出版社,1982:23-26.
[10]刘长友,黄炳香,常兴民,等.极软厚煤层大采高台阶式综采端面煤岩稳定性控制研究[J].中国矿业大学学报,2008,37(6):734-739.LIU Changyou,HUANG Bingxiang,CHANG Xingmin,et al.Study on tip to face coal and rock stability control of fully mechanized stepped large cutting height mining in extremely soft thick seam[J].Journal of China University of Mining&Technology,2008,37(6):734-739.
[11]华心祝,谢广祥.大采高综采工作面煤壁片帮机理及控制技术[J].煤炭科学技术,2008,36(9):1-3.HUA Xinzhu,XIE Guangxiang.Coal wall spalling mechanism and control technology of fully mechanized high cutting longwall coal mining face[J].Coal Science and Technology,2008,36(9):1-3.
[12]李文昌,段文军.综采工作面大倾角破碎顶板片帮冒顶防治技术[J].煤炭科学技术,2008,36(2):6-8.LI Wenchang,DUAN Wenjun.Prevention and control technology for spelling and failing of high inclined broken roof in fully mechanized mining face[J].Coal Science and Technology,2008,36(2):6-8.
[13]宁宇.大采高综采煤壁片帮冒顶机理与控制技术[J].煤炭学报,2009,34(1):50-52.NING Yu.Mechanism and control technique of the rib spalling in fully mechanized mining face with great mining height[J].Journal of China Coal Society,2009,34(1):50-52.
[14]张淑同,杨志恒,汪华君,等.采场破碎煤体注浆加固渗流规律研究[J].采矿与安全工程学报,2006,23(3):359-361.ZHANG Shutong,YANG Zhiheng,WANG Huajun,et al.Seepage law of grouting for reinforcing fractured coal in mining face[J].Journal of Mining&Safety Engineering,2006,23(3):359-361.
[15]王江峰,张海波,管学茂.超细水泥注浆材料煤壁注浆加固试验研究[J].河南理工大学学报:自然科学版,2011,30(2):146-148.WANG Jiangfeng,ZHANG Haibo,GUAN Xuemao.The study on micro-fine cement grouting martial applying in coal wall reinforcement[J].Journal of Henan Polytechnic University:Natural Science Edition,2011,30(2):146-148.
[2]方新秋,何杰,李海潮.软煤综放面煤壁片帮机理及防治研究[J].中国矿业大学学报,2009,38(5):640-644.FANG Xinqiu,HE Jie,LI Haichao.A study of the rib fall mechanism in soft coal and its control at a fully mechanized top coal caving face[J].Journal of China University of Mining&Technology,2009,38(5):640-644.
[3]YUAN Yong,TU Shihao,WU Q,et al.Mechanics of rib spelling of high coal walls under fully mechanized mining[J].Mining Science and Technology,2011,21(1):129-133.
[4]袁永,屠世浩,马小涛,等.“三软”大采高综采面煤壁稳定性及其控制研究[J].采矿与安全工程学报,2012,29(1):22-25.YUAN Yong,TU Shihao,MA Xiaotao,et al.Coal wall stability of fully mechanized working face with great mining height in“three soft”coal seam and its control technology[J].Journal of Mining&Safety Engineering,2012,29(1):22-25.
[5]尹希文,闫少宏,宁宇.用压杆理论分析大采高综采面煤壁片帮特征[J].采矿与安全工程学报,2008,25(2):222-225.YIN Xiwen,YAN Shaohong,NING Yu.Characters of the rib spelling in fully mechanized caving face with great mining height[J].Journal of Mining&Safety Engineering,2008,25(2):222-225.
[6]于新锋,柏建彪.张集矿综采工作面破碎煤壁注浆加固技术研究[J].煤炭科学技术,2006,34(2):69-71.YU Xinfeng,BAI Jianbiao.Research on grouting reinforced technology for broken coal wall of fully mechanized longwall mining face in Zhangji mine[J].Coal Science and Technology,2006,34(2):69-71.
[7]王家臣.极软厚煤层煤壁片帮与防治机理[J].煤炭学报,2007,32(8):785-788.WANG Jiachen.Mechanism of the rib spalling and the controlling in the very soft coal seam[J].Journal of China Coal Society,2007,32(8):785-788.
[8]赵彭年.松散介质力学[M].北京:地震出版社,1995:12-16.
[9]张天宝.土坡稳定性分析和土工建筑物的边坡设计[M].成都:成都科技大学出版社,1982:23-26.
[10]刘长友,黄炳香,常兴民,等.极软厚煤层大采高台阶式综采端面煤岩稳定性控制研究[J].中国矿业大学学报,2008,37(6):734-739.LIU Changyou,HUANG Bingxiang,CHANG Xingmin,et al.Study on tip to face coal and rock stability control of fully mechanized stepped large cutting height mining in extremely soft thick seam[J].Journal of China University of Mining&Technology,2008,37(6):734-739.
[11]华心祝,谢广祥.大采高综采工作面煤壁片帮机理及控制技术[J].煤炭科学技术,2008,36(9):1-3.HUA Xinzhu,XIE Guangxiang.Coal wall spalling mechanism and control technology of fully mechanized high cutting longwall coal mining face[J].Coal Science and Technology,2008,36(9):1-3.
[12]李文昌,段文军.综采工作面大倾角破碎顶板片帮冒顶防治技术[J].煤炭科学技术,2008,36(2):6-8.LI Wenchang,DUAN Wenjun.Prevention and control technology for spelling and failing of high inclined broken roof in fully mechanized mining face[J].Coal Science and Technology,2008,36(2):6-8.
[13]宁宇.大采高综采煤壁片帮冒顶机理与控制技术[J].煤炭学报,2009,34(1):50-52.NING Yu.Mechanism and control technique of the rib spalling in fully mechanized mining face with great mining height[J].Journal of China Coal Society,2009,34(1):50-52.
[14]张淑同,杨志恒,汪华君,等.采场破碎煤体注浆加固渗流规律研究[J].采矿与安全工程学报,2006,23(3):359-361.ZHANG Shutong,YANG Zhiheng,WANG Huajun,et al.Seepage law of grouting for reinforcing fractured coal in mining face[J].Journal of Mining&Safety Engineering,2006,23(3):359-361.
[15]王江峰,张海波,管学茂.超细水泥注浆材料煤壁注浆加固试验研究[J].河南理工大学学报:自然科学版,2011,30(2):146-148.WANG Jiangfeng,ZHANG Haibo,GUAN Xuemao.The study on micro-fine cement grouting martial applying in coal wall reinforcement[J].Journal of Henan Polytechnic University:Natural Science Edition,2011,30(2):146-148.
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