摘要
急倾斜厚煤层走向长壁综放工作面圆弧布置是解决工作面支架稳定性的创新方法。以东峡煤矿某工作面为背景,从现场监测支架荷载分布特征出发,提炼出急倾斜厚煤层长壁综放开采工作面支架4种基本失稳模式,在理论上推导出工作面支架稳定性临界状态方程,通过支架受力状态分析,阐述了圆弧段抑制工作面支架滑移和倾倒失稳的力学作用,建立了满足支架稳定性要求的圆弧段临界长度准则。给出了考虑不同煤层倾角和工作面斜直线段长度条件下,保证工作面支架整体稳定所需圆弧段长度的临界曲面。
The curved layout of long-wall working face is an innovation method to solve the support instability of fully mechanized top coal caving mining face in steeply inclined thick coal seam.Based on the case study of coal mining in Dongxia Mine and the monitored support load distribution characteristics,four basic instable support modes in longwall top coal caving miming face in steeply inclined thick coal seam were put forward.On the basis of theoretic analysis,the critical state equations of face support stability were derived.Through the analysis of the supporting state of the supports,the mechanical roles of arc segment in inhibiting the support sliding and toppling were elaborated,and the criterion of the critical length of the arc segment was established for satisfying support stability. Based on the analytic model,the critical surface of arc segment length was provided to ensure the overall support stability in the working face under the conditions of different inclination angles of the coal seams and the inclined straight lengths of mining face.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2015年第10期2361-2369,共9页
Journal of China Coal Society
基金
国家自然科学基金重点资助项目(U1361208)
关键词
大倾角
综放工作面
圆弧段
支架
稳定性
steeply inclined
fully mechanized top coal caving face
arc segment
support
stability
