工作面推进速率对矿压显现规律影响研究
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摘要
为了研究工作面推进速率对矿压显现规律的影响,分析了工作面推进速率影响因素,利用层次分析法研究了工作面推进速率的影响因素,研究得出:顶板活动、矿山压力显现、刮板输送机性能、采煤机性能、瓦斯排放、自燃发火的影响权重值为0. 242 9,0. 264 6,0. 104 1,0. 104 1,0. 174 1,0. 110 2;矿山压力显现对工作面影响最大;采用FLAC3D数值模拟软件,研究了在不同工作面推进速率下围岩塑性区、应力场和位移场的分布,得出:随着工作面推进速率的增加,煤壁前方发生剪切破坏和拉伸破坏范围逐渐降低、工作面超前支撑压力逐渐靠近煤壁,并且峰值逐渐增大,应力系数也逐渐增大、煤壁破坏程度减少,致使煤壁的水平位移量减小。
In order to study the influence of the advancement rate of the working face on the law of mine pressure,the factors affecting the propulsion rate of the working face were analyzed. The analytic hierarchy process(without too much introduction) was used to study the influencing factors of the propulsion rate of the working face. The weights of activities,mine pressure manifestations,scraper conveyor performance,shearer performance,gas emission,and spontaneous combustion were 0. 242 9,0. 264 6,0. 104 1,0. 104 1,0. 174 1,and0. 110 2,and the mine pressure appears to had the greatest impact on the working face. Using FLAC3 Dnumerical simulation software,the distribution of plastic zone,stress field and displacement field of surrounding rock under different working surface advancing rates was studied. It was concluded that shearing damage occurs in front of coal wall with the increase of working face advancing rate. The tensile failure range was gradually reduced,the supporting pressure of the working face was gradually approaching the coal wall,and the peak value was gradually increased,the stress coefficient was gradually increased,and the degree of damage of the coal wall was reduced,so that the horizontal displacement of the coal wall was reduced.
In order to study the influence of the advancement rate of the working face on the law of mine pressure,the factors affecting the propulsion rate of the working face were analyzed. The analytic hierarchy process(without too much introduction) was used to study the influencing factors of the propulsion rate of the working face. The weights of activities,mine pressure manifestations,scraper conveyor performance,shearer performance,gas emission,and spontaneous combustion were 0. 242 9,0. 264 6,0. 104 1,0. 104 1,0. 174 1,and0. 110 2,and the mine pressure appears to had the greatest impact on the working face. Using FLAC3 Dnumerical simulation software,the distribution of plastic zone,stress field and displacement field of surrounding rock under different working surface advancing rates was studied. It was concluded that shearing damage occurs in front of coal wall with the increase of working face advancing rate. The tensile failure range was gradually reduced,the supporting pressure of the working face was gradually approaching the coal wall,and the peak value was gradually increased,the stress coefficient was gradually increased,and the degree of damage of the coal wall was reduced,so that the horizontal displacement of the coal wall was reduced.
引文
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[15]温兴林,张坤.厚煤层不规则回采工作面顶板矿压显现规律研究[J].煤炭技术,2017(1):29-31.Wen Xinglin,Zhang Kun. Study on the law of roof pressure behav-ior of irregular mining face in thick coal seam[J]. Coal Technolo-gy,2017(1):29-31.
[16]彭涛,王庆雄.长度变化对综采工作面矿压显现规律影响研究[J].中国煤炭,2014(1):58-61.Peng Tao,Wang Qingxiong. Study on the influence of lengthchange on the law of mine pressure appearance in fully mechanizedmining face[J]. China Coal,2014(1):58-61.
[17]黄荣宾.综采工作面末采阶段矿压显现规律研究[D].西安:西安科技大学,2015.
[18]陈洋,张丽丽,武泉林,等.采空区留煤垛技术对综放工作面矿压显现规律影响研究[J].煤炭技术,2014,33(9):181-183.Chen Yang,Zhang Lili,Wu Quanlin,et al. Study on influence ofcoal mining technology in goaf on mine pressure behavior law offully mechanized caving face[J]. Coal Technology,2014,33(9):181-183.
[19]张学亮.榆家梁煤矿浅理较薄煤层综采工作面矿压显现规律研究[D].北京:煤炭科学研究总院,2010.
[20]刘常荣,王继新.薄煤层蹬空开采工作面矿压显现规律研究[J].科技视界,2015(4):351-352.Liu Changrong,Wang Jixin. Study on the law of mine pressure be-havior in the face of thin coal seam hollow mining[J]. Science&Technology Vision,2015(4):351-352.
[2]刘洪磊,杨天鸿,张博华,等.西部煤层开采覆岩垮落及矿压显现影响因素研究[J].煤炭学报,2017,42(2):460-469.Liu Honglei,Yang Tianhong,Zhang Bohua,et al. Study on factorsaffecting overburden degradation and mine pressure in coal seammining in western China[J]. Journal of China Coal Society,2017,42(2):460-469.
[3]王世炫.推进速度对大采高工作面矿压显现的影响研究[D].淮南:安徽理工大学,2015.
[4]熊晓峰,黄庆国,李佳,等.坚硬顶板弱化技术对工作面矿压显现规律的影响研究[J].煤炭工程,2016,48(1):77-80.Xiong Xiaofeng,Huang Qingguo,Li Jia,et al. Study on the influ-ence of hard roof weakening technology on the law of mine pressureappearance in working face[J]. Coal Engineering,2016,48(1):77-80.
[5]何正刚.浅埋煤层工作面矿压显现规律实测分析及控制研究[J].煤矿开采,2015(1):82-85.He Zhenggang. Research on actual measurement analysis and con-trol of mine pressure display law in shallow coal seam face[J].Coal Mining Technology,2015(1):82-85.
[6]张小洋.大采高工作面推进速度对关键层垮落型式的影响研究[J].江西煤炭科技,2015(2):143-145.Zhang Xiaoyang. Study on the influence of the propulsion speed oflarge mining face on the falling pattern of key layers[J]. JiangxiCoal Science&Technology,2015(2):143-145.
[7]张学会,阚磊.推进速度对综放开采矿压显现影响的实测研究[J].煤炭技术,2011,30(11):93-94.Zhang Xuehui,Kan Lei. Measured research on the influence of pro-pulsion speed on the development pressure of fully mechanized ca-ving mining[J]. Coal Technology,2011,30(11):93-94.
[8]刘全明.浅埋综采工作面矿压显现的推进速度效应分析[J].煤炭科学技术,2010,38(7):24-26.Liu Quanming. Analysis of propulsion speed effect of mine pressurein shallow fully mechanized mining face[J]. Coal Science andTechnology,2010,38(7):24-26.
[9]夏永学.屯留矿大采高综放工作面矿压显现规律与煤壁稳定性研究[D].北京:煤炭科学研究总院,2008.
[10]李海涛,赵毅鑫,姜耀东,等.上分层煤柱群下工作面矿压显现规律及主控因素分析[J].煤矿安全,2014,45(6):192-195.Li Haitao,Zhao Yixin,Jiang Yaodong,et al. Mine pressure behav-ior law and main controlling factors analysis of working face underupper coal seam group[J]. Safety in Coal Mines,2014,45(6):192-195.
[11]王国洪.王家岭煤矿首采工作面的矿压显现特征及关键技术研究[D].北京:中国矿业大学(北京),2016.
[12]任天存,魏明利,陈兴隆.宁庄井三软煤层综采工作面矿压显现规律研究[J].中州煤炭,2011(5):5-7.Ren Tiancun,Wei Mingli,Chen Xinglong. Research on miningpressure behavior law of fully mechanized mining face in Ning-zhuangjing Three Soft coal seam[J]. Zhongzhou Coal,2011(5):5-7.
[13]李兴伟,孙广义,陈刚.不规则坚硬顶板工作面矿压显现规律研究[J].能源技术与管理,2013,38(4):13-15.Li Xingwei,Sun Guangyi,Chen Gang. Study on the law of minepressure behavior in irregular hard roof working face[J]. EnergyTechnology and Management,2013,38(4):13-15.
[14]张金龙.大采高倾斜长壁综采工作面矿压显现规律及控制研究[D].淮南:安徽理工大学,2004.
[15]温兴林,张坤.厚煤层不规则回采工作面顶板矿压显现规律研究[J].煤炭技术,2017(1):29-31.Wen Xinglin,Zhang Kun. Study on the law of roof pressure behav-ior of irregular mining face in thick coal seam[J]. Coal Technolo-gy,2017(1):29-31.
[16]彭涛,王庆雄.长度变化对综采工作面矿压显现规律影响研究[J].中国煤炭,2014(1):58-61.Peng Tao,Wang Qingxiong. Study on the influence of lengthchange on the law of mine pressure appearance in fully mechanizedmining face[J]. China Coal,2014(1):58-61.
[17]黄荣宾.综采工作面末采阶段矿压显现规律研究[D].西安:西安科技大学,2015.
[18]陈洋,张丽丽,武泉林,等.采空区留煤垛技术对综放工作面矿压显现规律影响研究[J].煤炭技术,2014,33(9):181-183.Chen Yang,Zhang Lili,Wu Quanlin,et al. Study on influence ofcoal mining technology in goaf on mine pressure behavior law offully mechanized caving face[J]. Coal Technology,2014,33(9):181-183.
[19]张学亮.榆家梁煤矿浅理较薄煤层综采工作面矿压显现规律研究[D].北京:煤炭科学研究总院,2010.
[20]刘常荣,王继新.薄煤层蹬空开采工作面矿压显现规律研究[J].科技视界,2015(4):351-352.Liu Changrong,Wang Jixin. Study on the law of mine pressure be-havior in the face of thin coal seam hollow mining[J]. Science&Technology Vision,2015(4):351-352.
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