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赵 飞,张 峰,李全中,等. 综采工作面刮板输送机窜动机理及主动控制方法[J]. 煤炭科学技术,xxxx,xx(x): x−xx. DOI: 10.12438/cst.2024–0667
引用本文: 赵 飞,张 峰,李全中,等. 综采工作面刮板输送机窜动机理及主动控制方法[J]. 煤炭科学技术,xxxx,xx(x): x−xx. DOI: 10.12438/cst.2024–0667
ZHAO Fei,ZHANG Feng,LI Quanzhong,et al. Moving mechanism and active control method of scraper conveyor in fully mechanized mining face[J]. Coal Science and Technology,xxxx,xx(x): x−xx. DOI: 10.12438/cst.2024–0667
Citation: ZHAO Fei,ZHANG Feng,LI Quanzhong,et al. Moving mechanism and active control method of scraper conveyor in fully mechanized mining face[J]. Coal Science and Technology,xxxx,xx(x): x−xx. DOI: 10.12438/cst.2024–0667

综采工作面刮板输送机窜动机理及主动控制方法

Moving mechanism and active control method of scraper conveyor in fully mechanized mining face

  • 摘要: 为研究综采工作面刮板输送机窜动机理,综合分析进刀工艺、工作面倾角、支架推力对刮板输送机窜动的影响,理清了刮板输送机的窜动机理,界定了刮板输送机窜动的临界位置与允许窜动量,设置了窜动预警区,明晰了刮板输送机的窜动状态,并提出监测和主动控制窜动的有效方法。研究表明:两端头推进度差、工作面倾角变化、液压支架推力与刮板输送机窜动趋向关系是产生窜动的主要原因;以采煤机恰能完成端部斜切进刀与采煤工作面安全出口最小宽度(0.8 m)为临界,确定了刮板输送机窜动的临界位置;当采煤机在机头恰能完成斜切进刀时,刮板输送机机头位置为机头窜后的临界位置;当桥式转载机挡煤板距煤柱帮的距离为0.8 m时,刮板输送机机头位置为机头窜前的临界位置;当采煤机在机尾恰能完成斜切进刀时,刮板输送机机尾位置为机尾窜前的临界位置;当刮板输送机机尾距煤柱帮的距离为0.8 m时,刮板输送机机尾位置为机尾窜后的临界位置;机头(尾)在窜前临界位置与窜后临界位置之间运动的区间长度即为刮板输送机的允许窜动量;为及时预警、主动控制窜动,将允许窜动量等量划分为窜前严重区、窜前警戒区、正常区、窜后警戒区、窜后严重区5个区域;采用激光定位方法,记录激光定位点与基准标记点的水平错距,精准判定两端头所在窜动区域;根据刮板输送机机头、机尾所在的窜动区域可将窜动状态分为正常状态、单窜状态、双窜状态;针对特定的窜动状态,因地制宜提出调整进刀工艺、工作面伪斜角、支架推力等主动控制窜动的有效措施;相关成果在华阳新材料股份有限公司二矿展开应用,确定了80807工作面机头与机尾的允许窜动量分别为0.8 m与1.0 m,划分了窜动预警区域,利用激光监测精准判定了刮板输送机的窜动状态,并及时采取对应的控窜措施,取得了良好的控制效果。

     

    Abstract: In order to study the movement mechanism of the scraper conveyor in the fully mechanized mining face, the influence of cutting process, working face dip angle and thrust force of hydraulic support on the movement of scraper conveyor are analyzed comprehensively, the movement mechanism of scraper conveyor is clarified, the critical position and permissible movement value of the scraper conveyor are defined, warning area of movement is set up, the movement state of scraper conveyor is clarified, ulteriorly the effective monitoring method and initiative control of scraper conveyor movement are put forward. The research shows that the propulsion difference of both ends, the change of working face dip angle, the relationship between support thrust and the scraper conveyor movement trend are the main reasons for the movement.The critical position and moving value at both ends are determined by the minimum width (0.8 m) of the safe exit of the coal mining face and the coal mining machine only just complete end oblique cutting. When the coal mining machine can just complete the oblique cutting at the head, the head position of the scraper conveyor is the critical position of rearward movement ; when the distance between the coal retaining plate of the bridge stage loader and the coal pillar is 0.8 m, the head position of the scraper conveyor is the critical position of forward movement. When the the coal mining machine can just complete the oblique cutting at the tail, the tail position of the scraper conveyor is the critical position of forward movement. When the distance between the tail of the scraper conveyor and the coal pillar is 0.8 m, the tail position of the scraper conveyor is the critical position of rearward movement. The permissible movement value of the scraper conveyor is the interval length between the critical position of rearward movement and the critical position of forward movement of scraper conveyor movement. For conducting timely warning and initiative measures to control scraper conveyor movement, permissible movement value is divided equally into five areas:serious area of foward movement, warning area of foward movement, normal area, warning area of rearward movement and serious area of rearward movement. The laser positioning method is used to record the horizontal offset between the laser positioning point and the fiducial mark point, and the moving area of both ends is determined accurately. According to the moving area of both ends of scraper conveyor, the moving state can be divided into normal state, single moving state and double moving state. Aiming at the specific movement state, according to local conditions, effective measures for initiative control of movement are put forward, such as adjusting cutting process, obliquity of working face, thrust direction of support and other measures. The relevant results have been applied in No.2 Coal Mine of Huayang New Material Co., Ltd., the permissible movement value of the head and tail of the 80807 working face are 0.8 m and 1.0 m respectively, and the moving alert area is divided, the moving state of scraper conveyor is accurately determined by laser monitoring., and initiative control measures are taken in time, and good control results have been achieved.

     

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