近距离煤层群上行开采工作面巷道布置研究
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摘要
钱家营矿主采煤层以典型的近距离煤层群形式赋存,为解决钱家营矿近距离煤层群开采中由于村庄压煤而面临的采掘衔接困难问题,对下部12-1煤层开采的保护范围进行计算,并通过理论分析、数值计算、相似材料模拟试验等方法,分析了12-1煤层开采后对9煤层的影响和破坏程度,研究了12-1煤层回采后上覆岩层变形和应力变化以及煤柱区域垂直应力变化特征。结果表明:下部12-1煤层开采后,对9煤层具有保护效果,采动影响系数K值为10.8～13.0,煤层破坏程度在30以内,9煤层总体形态较好,处于12-1煤层的裂隙带中,应力降低明显,卸压效果显著。提出跨煤柱巷道布置方案,进一步减弱了采动影响。现场监测表明运用上行开采跨煤柱巷道布置方式对解决钱家营矿近距离煤层群的开采问题效果良好。
The main mineable coal seams of Qianjiaying coal mine are typically closed distance seams. In order to solve the problem of mining connection for Qianjiaying coal mine,the protection range of the lower 12-1 coal seam was calculated. And using theoretical analysis,numerical simulation,similar material simulation experiment and other methods analyzed the influence and damage degree of 9 coal seam after mining the 12-1 coal seam. It also studied the deformation and stress variation characteristics of overlying strata and variation characteristics of vertical stress in coal pillar after 12-1 coal seam mined. The results show that the mining influence coefficient value for 9 coal seam is 10.8 ～13.0,and the coal seam damage degree is less than 30. The overall shape of 9 coal seam is generally complete,and the stress decreases significantly and the pressure relief effect is remarkable for 9 coal seam. It proposes the roadway layout of straddled coal pillars,which further weakens the influence of mining for 9 coal seam. According to field observation,the roadway layout of straddled coal pillars with ascending mining can effectively solve the problem of mining closed distance coal seams in Qianjiaying coal mine.
The main mineable coal seams of Qianjiaying coal mine are typically closed distance seams. In order to solve the problem of mining connection for Qianjiaying coal mine,the protection range of the lower 12-1 coal seam was calculated. And using theoretical analysis,numerical simulation,similar material simulation experiment and other methods analyzed the influence and damage degree of 9 coal seam after mining the 12-1 coal seam. It also studied the deformation and stress variation characteristics of overlying strata and variation characteristics of vertical stress in coal pillar after 12-1 coal seam mined. The results show that the mining influence coefficient value for 9 coal seam is 10.8 ～13.0,and the coal seam damage degree is less than 30. The overall shape of 9 coal seam is generally complete,and the stress decreases significantly and the pressure relief effect is remarkable for 9 coal seam. It proposes the roadway layout of straddled coal pillars,which further weakens the influence of mining for 9 coal seam. According to field observation,the roadway layout of straddled coal pillars with ascending mining can effectively solve the problem of mining closed distance coal seams in Qianjiaying coal mine.
引文
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[20]辽宁工程技术大学,开滦(集团)有限责任公司.开滦矿区地应力场分析及工程应用研究[R].唐山:开滦(集团)有限责任公司,2012.(Liaoning Technical University,Kai Luan(Group)Co.,Ltd,Analysis of geostress field and engineering application research in Kailuan Mining Area[R].Tangshan:Kailuan(Group)Co.,Ltd.,2012.(in Chinese))
[2]白国良.大兴煤矿北一东采区2-3煤上行开采数值模拟[J].辽宁工程技术大学学报(自然科学版),2014,33(2):157-161.(Bai Guoliang.Numerical simulation on upward mining of nle 2-3 coal seam in Daxing mine[J].Journal of Liaoning Technical University Natural Science Edition,2014,33(2):157-161.(in Chinese))
[3]张勇,刘传安,张西斌,等.煤层群上行开采对上覆煤层运移的影响[J].煤炭学报,2011,36(12):1990-1995.(Zhang Yong,Liu Chuan’an,Zhang Xibin,et al.The influence of ascending mining on the movement character of overlying coal seam in coal seams group[J].Journal of China Coal Society,2011,36(12):1990-1995.(in Chinese))
[4]冯国瑞,任亚峰,王鲜霞,等.白家庄煤矿垮落法残采区上行开采相似模拟实验研究[J].煤炭学报,2011,36(4):544-550.(Feng Guorui,Ren Yafeng,Wang Xianxia,et al.Experimental study on the upward mining of the left-over coal above gob area mined with caving method in Baijiazhuang Coal Mine[J].Journal of China Coal Society,2011,36(4):544-550.(in Chinese))
[5]马立强,汪理全,张东升,等.近距离煤层群上行开采可行性研究与工程应用[J].湖南科技大学学报(自然科学版),2007,22(4):1-5.(Ma Liqiang,Wang Liquan,Zhang Dongsheng,et al.Application and study on feasibility of near distance coal seam group ascending mining[J].Journal of Hunan University of Science&Technolog,2007,22(4):1-5.(in Chinese))
[6]张宏伟,韩军,海立鑫,等.近距煤层群上行开采技术研究[J].采矿与安全工程学报,2013,30(1):63-67.(Zhang Hongwei,Han Jun,Hai Lixin,et al.Study on closed multiple-seam in the ascending mining technology[J].Journal of Mining&Safety Engineering,2013,30(1):63-67.(in Chinese))
[7]南存全,王玉成,商佳新,等.近距离煤层下回采巷道支护技术[J]辽宁工程技术大学学报(自然科学版),2015,34(5):550-554.(Nan Cunquan,Wang Yucheng,Shang Jiaxin,et al.Mining roadway supporting technology under close distance coal seams[J].Journal of Liaoning Technical University(Natural Science),2015,34(5):550-554.(in Chinese))
[8]李树清,龙祖根,罗卫东,等.煤层群下保护层开采保护范围的数值模拟[J].中国安全科学学报,2012,22(6):34-40.(Li Shuqing,Long Zugen,Luo Weidong,et al.Numerical simulation of protection scope when lower-protective layer mined in coal seams[J].China Safety Science Journal,2012,22(6):34-40.(in Chinese))
[9]赵训,韩真理,李树清,等.近距离煤层下保护层开采保护范围的确定[J].煤炭科学技术,2013,41(10):53-56.(Zhao Xun,Han Zhenli,Li Shuqing,et al.Mining protection scope determination of Low protective seam in contiguous seams[J].Coal Science and Technology,2013,41(10):53-56.(in Chinese))
[10]王成,张农,李桂臣,等.上行开采顶板不同区域巷道稳定性控制原理[J].中国矿业大学学报,2012,41(4):543-550.(Wang Cheng,Zhang Nong,Li Guichen,et al.Control principles for roadway roof stabilization in different zones during ascending mining[J].Journal of China University of Minim&Technology,2012,41(4):543-550.(in Chinese))
[11]王志强,冯锐敏,高运,等突出煤层实现连续卸压的倾斜近距下保护层开采技术研究[J].岩石力学与工程学报,2013,32(增2):3795-3802.(Wang Zhiqiang,Feng Ruimin,Gao Yun,et al.Research on mining technology of nether protective seam in inclined contiguous seams with continuous pressure-relief on outburst coal seam[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(Supp.2):3795-3802.(in Chinese))
[12]国家安全生产监督管理总局.保护层开采技术规范(AQ 1050-2008)[S].北京:煤炭工业出版,2008.(State Administration of Work Safety.Technical criterion of protective coal seam exploitation(AQ 1050-2008)[S].Beijing:Coal Industry Press,2008.(in Chinese))
[13]徐永圻.煤矿开采学[M].徐州:中国矿业大学出版社,2009.(Xu Yongqi.Coal mining[M].Xuzhou:China University of Mining and Technology press.2009.(in Chinese))
[14]Singh A K,Singh R,Mandal P K.Inclined slicing of a thick coal seam in ascending order:a case study[J].CIM Bulletin,2002,95(3):124-128.
[15]蒋金泉,孙春江,尹增德,等.深井高应力难采煤层上行卸压开采的研究与实践[J].煤炭学报,2004,29(1):1-6.(Jiang Jinquan,Sun Chunjiang,Yin Zengde,et al.Study and practice of bottom slicing relieving mining in condition of trouble coal seams with high ground stress under deep coal mine[J].Journal of China Coal Society,2004,29(1):1-6.(in Chinese))
[16]吴宝杨,邓志刚,赵善坤,等.上行开采过程中危险源分析及现场验证[J].地下空间与工程学报,2016,12(增2):863-869.(Wu Baoyang,Deng Zhigang,Zhaoi Shankun,et al.Hazard source analyses and field verification in upward mining process[J].Chinese Journal of Underground Space and Engineering,2016,12(Supp.2):863-869.(in Chinese))
[17]汪理全,李中颃.煤层(群)上行开采技术[M].北京:煤炭工业出版社,1995.(Wang Liquan,Li Zhonghang.Ascending mining technology of coal seam(Group)[M].Beijing:China Coal Industry Publishing House,1995.(in Chinese))
[18]韩军,张宏伟,张普田,等.开滦矿区近距离煤层群上行开采可行性判别研究[J].煤炭科学技术,2011,39(10):14-17.(Han Jun,Zhang Hongwei,Zhang Putian,et al.Feasibility study on upward mining in seam group with short distance to each other in Kailuan Mining Area[J].Coal Science and Technology,2011,39(10):14-17.(in Chinese))
[19]韩军,宋卫华,朱志洁.近距离煤层群上行开采技术[M].北京:煤炭工业出版社,2013.(Han Jun,Song Weihua,Zhu Zhijie.Ascending mining technology of closed distance coal seam group[M].Beijing:China Coal Industry Publishing House,2013.(in Chinese))
[20]辽宁工程技术大学,开滦(集团)有限责任公司.开滦矿区地应力场分析及工程应用研究[R].唐山:开滦(集团)有限责任公司,2012.(Liaoning Technical University,Kai Luan(Group)Co.,Ltd,Analysis of geostress field and engineering application research in Kailuan Mining Area[R].Tangshan:Kailuan(Group)Co.,Ltd.,2012.(in Chinese))