倾斜综放面支架防倒防滑技术研究

为研究大倾角综放面支架稳定控制措施,文章从支架稳定性影响因素分析入手,探究了支架倾角与立柱支撑力的失稳临界条件,并基于孟家窑矿11508工作面地质条件确定了支架稳定性控制措施。研究表明,ZF4600/17/32支架的临界煤层倾角为16°,所需残余支撑压力为223kN,将工作面调斜5°~8°或留设15m防倒圆弧煤柱能够有效降低煤层倾角带来的不利影响,支架间安装防倒千斤顶和柔性支护装置,能够有效增强支架带压能力,保障支架不出现失稳现象。11508工作面工程实践表明支架额定工作阻力能够充分发挥作用,月进尺量提升15%,能够满足工作面技术经济要求。

Research on the anti-falling and anti-sliding technology of support in inclined fully mechanized top coal caving face

In order to study the support stability control measures of large dip angle fully mechanized top coal caving face,the paper analyzes the influencing factors of support stability,explores the instability critical conditions of support angle and column support force,and determines the support stability control measures based on the geological conditions of 11508 working face in Mengjiayao mine.The research shows that the critical coal seam dip angle of ZF4600/17/32 support is 16°and the required residual support pressure is 223kN,adjusting the working face to 5-8°or setting 15 m anti-collapse arc coal pillar can effectively reduce the adverse impact of coal seam dip angle.Installing anti collapse Jack and flexible support device between supports can effectively enhance the pressure bearing capacity of the support and ensure that the support does not appear instability.The engineering practice of 11508 working face shows that the rated working resistance of the support can play a full role and the monthly footage can be increased by 15%,which can meet the technical and economic requirements of the working face.