摘要
随着煤矿开采强度的加大,浅部薄及中厚煤层已逐渐引起关注.薄及中厚煤层中的半煤岩巷进尺较低,成为制约矿井高产高效的瓶颈之一.结合香山公司半煤岩巷的掘进现状,采用数值模拟方法对其支护参数进行优化设计,将锚杆间排距由0.7 m扩大为0.9 m,巷道围岩塑性区变化不明显,锚杆(索)作用在弹塑性范围内,巷道围岩位移及支护受力在250KN左右.现场工业性试验表明,巷道两帮最大变形量113mm,顶板最大下沉量128mm,稳定后收敛速率小于0.1mm/d;单月进尺达180 m,施工段累积节省158.11万元,对同类条件下的半煤岩巷快实现快速掘进有一定的参考价值.
Shallow mining in thin and medium thick coal seams has been in programme with the more and more intensive mining. Low tunnelling speed of semi coal and rock roadways is one of bottlenecks to high effect and productive mining. Based on tunnelling existing condition of Xiangshan coal mine, numerical simulation optimization on parameters of bolt support is performed. Array pitch and space length are increased from 0.7m to 0.9m. Bolts and cables were acted in elastic and plastic zone and axes force was about 250 KN. Plastic zone and displacement of surrounding rock and stress of support are in the rational range and commercial test shows that deformation of adjacent rock is in rational range. The maxiumum displacement of walls and roof is 113 mm and 128 mm. Tunneling length monthly is 180 m and total savage is 1.58 millon yuan of the.stage. Better efficiency of technology and economy are obtained through field experiment which is useful in the same condition.
出处
《河南理工大学学报（自然科学版）》
CAS
2009年第6期705-708,共4页
Journal of Henan Polytechnic University（Natural Science）
基金
国家自然科学基金资助项目(50874037)
河南省教育厅自然科学研究资助项目(2008A440006)
2007年度国家安全生产科技计划项目(07-148)
关键词
半煤岩巷
锚杆支护
数值模拟
优化
semi coal and rock roadways
bolt support
numerical simulation
optimization
