综采工作面大角度旋转俯采技术研究
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摘要
为解决芦岭矿Ⅱ104东翼采区原设计布置的3个工作面造成的回采巷道布置困难、工作面搬家频繁、综采工作面连续推进长度短的问题,利用数值模拟和现场观测,并基于Ⅱ104东翼采区煤层赋存条件及原巷道布置特点,将原设计的3个工作面合为1个Ⅱ1041工作面,对综采大角度旋转开采方案、工艺参数和旋转技术要求、矿压显现规律等关键技术进行了研究,并对整个采场的采动应力变化规律进行了分析,有效解决了Ⅱ1041工作面旋转开采期间刮板输送机的上下窜动以及支架旋转角度控制的问题。研究结果表明:采用进刀比为1:8的旋转开采方案,经过54个循环,共旋转74°,旋转期间支架最大工作阻力为6 481 kN,与额定工作阻力相比仍有4.7%的富余量,且支架无倒架、挤架的现象。实现了工作面在复杂条件下不搬家,连续推进,保证了工作面的正常回采。
In order to solve the problem that the layout of the mining roadway caused by the three working faces of the original design of the east wing mining area II104 of the Luling Mine is difficult,the moving is frequent,and the continuous length of the fully mechanized mining face is short,using numerical simulation and field observation,and based on the original conditions of the coal seams in the II104 East Wing mining area and the characteristics of the roadway layout,the three working faces of the original design were combined into a II1041 working face.The key technology for the fully mechanized large-angle rotary mining plan,the process parameters and the rotating technology requirements,and the mining pressure law were studied combined with numerical simulation.The research was carried out to analyze the variation law of mining stress in the whole stope,and the method of controlling the up and down movement of the conveyor during the rotation of the II1041 working face and the control of the rotation angle of the bracket was put forward.The research results show that: with an adoption ratio of 1 ∶ 8,after 54 cycles,a total of 74° roration is completed.The maximum working resistance of the bracket during rotation is 6 481 k N/frame,and there is still a surplus of 4.7%.This has ensured the normal recovery of the working face.
In order to solve the problem that the layout of the mining roadway caused by the three working faces of the original design of the east wing mining area II104 of the Luling Mine is difficult,the moving is frequent,and the continuous length of the fully mechanized mining face is short,using numerical simulation and field observation,and based on the original conditions of the coal seams in the II104 East Wing mining area and the characteristics of the roadway layout,the three working faces of the original design were combined into a II1041 working face.The key technology for the fully mechanized large-angle rotary mining plan,the process parameters and the rotating technology requirements,and the mining pressure law were studied combined with numerical simulation.The research was carried out to analyze the variation law of mining stress in the whole stope,and the method of controlling the up and down movement of the conveyor during the rotation of the II1041 working face and the control of the rotation angle of the bracket was put forward.The research results show that: with an adoption ratio of 1 ∶ 8,after 54 cycles,a total of 74° roration is completed.The maximum working resistance of the bracket during rotation is 6 481 k N/frame,and there is still a surplus of 4.7%.This has ensured the normal recovery of the working face.
引文
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[2]杨增越,王炯,刘帅,等.复杂环境近距离煤层超长工作面回采实践研究[J].煤炭科学技术,2018,46(S1):1-5,22.YANG Zengyue,WANG Wei,LIU Shuai,et al.Research on the mining practice of ultra-long workingface in complex environment near coal seam[J].Coal Science and Technology,2018,46(S1):1-5,22.
[3]刘洪磊,杨天鸿,张鹏海,等.复杂地质条件下煤层顶板“O-X”型破断及矿压显现规律[J].采矿与安全工程学报,2015,32(5):793-800.LIU Honglei,YANG Tianhong,ZHANG Penghai,et al.“OX”type breaking and roof pressure behavior law of coal seam roof under complex geological conditions[J].Journal of Mining and Safety Engineering,2015,32(5):793-800.
[4]杨胜利,张康宁,李良晖.薄煤层M形工作面连续旋转开采技术[J].煤炭科学技术,2018,46(1):105-111.YANG Shengli,ZHANG Kangning,LI Lianghui.Continuous rotary mining technology for m-shaped working face in thin coal seam[J].Coal Science and Technology,2018,46(1):105-111.
[5]李亮,马庆,王辉,等.综放工作面转采方案设计及矿压显现特征研究[J].矿业研究与开发,2018,38(5):56-60.LI Liang,MA Qing,WANG Hui,et al.Study on the design of mining technology and the characteristics of mine pressure in fully mechanized caving face[J].Mining Research and Development,2018,38(5):56-60.
[6]石春宇.复杂条件下L型孤岛煤柱旋转开采应用研究[D].河北工程大学,2014.
[7]贾连鑫.大采高综采放顶煤工作面旋转调斜开采技术[J].煤炭科学技术,2018,46(S1):119-122.JIA Lianxin.Rotary adjustment mining technology for large mining height fully mechanized top coal caving face[J].Coal Science and Technology,2018,46(S1):119-122.
[8]张科学,李首滨,何满潮,等.智能化无人开采系列关键技术之一---综采智能化工作面调斜控制技术研究[J].煤炭科学技术,2018,46(1):139-149.ZHANG Kexue,LI Shoubin,HE Manchao,et al.One of the key technologies of intelligent unmanned mining series---Study on the control technology of fully mechanized intelligent working face tilting control[J].Coal Science and Technology,2018,46(1):139-149.
[9]王元杰,刘金亮,陈法兵.深井特厚煤层综放工作面旋转调采期间微震活动规律研究[J].煤矿开采,2017,22(5):89-91,70.WANG Yuanjie,LIU Jinliang,CHEN Fabing.Study on micro-seismic activity law during rotary adjustment of fully mechanized caving face in deep coal seam[J].Coal Mining,2017,22(5):89-91,70.
[10]屠世浩,郝明奎,谢耀社.孤岛煤柱综采工作面旋转开采关键技术[J].中国矿业大学学报,2004,33(5):30-33.TU Shihao,HAO Mingkui,XIE Yaoshe.Key technology of rotary mining in fully mechanized mining face of gudao coal pillar[J].Journal of China University of Mining and Technology,2004,33(5):30-33.
[11]王惠风,陈殿赋,师泽敏.保德煤矿综放工作面旋转开采关键技术研究[J].煤炭科学技术,2019,47(3):131-135.WANG Huifeng,CHEN Dianfu,SHI Zemin.Study on key technology of rotary mining in fully mechanized caving face of Baode Coal Mine[J].Coal Science and Technology,2019,47(3):131-135.
[12]杨科,陆伟,潘桂如,等.复杂条件大倾角大采高旋转综采矿压显现规律及其控制[J].采矿与安全工程学报,2015,32(2):199-205.YANG Ke,LU Wei,PAN Guiru,et al.Pressure law and control of large-angle and High-rotation comprehensive mining in complex conditions[J].Journal of Mining and Safety Engineering,2015,32(2):199-205.
[13]赵庆民,施现院,常庆粮.复杂地质条件下综采工作面旋转开采关键技术研究[J].煤炭技术,2017,36(5):90-93.ZHAO Qingmin,SHI Xianyuan,CHANG Qingliang.Study on key technologies of rotary mining in fully mechanized mining face under complex geological conditions[J].Coal Technology,2017,36(5):90-93.
[14]杜振启,屈华.综采工作面旋转调斜开采安全措施[J].山东煤炭科技,2013(4):237-238.DU Zhenqi,QU Hua.Safety measures for rotary tune mining in fully mechanized mining face[J].Shandong Coal Science and Technology,2013(4):237-238.
[15]贾国忠.综采工作面末采旋转调面回采工艺优化设计[J].山东煤炭科技,2018(6):208-209.JIA Guozhong.Optimization design of mining and adjusting surface mining technology in the end of fully mechanized mining face[J].Shandong Coal Science and Technology,2018(6):208-209.