摘要
为了研究煤层厚度和形状对来压步距的影响,采用梁式力学模型理论分析了厚度稳定水平工作面的初次来压和周期来压步距,并对河林煤矿J7401工作面煤层厚度和形状的分布变化及现场周期来压情况进行监测。结合煤层分布图和来压特征监测图,对比分析理论计算结果和实测数据得出:煤层厚度大时周期来压步距偏小,煤层厚度小时周期来压步距偏大;当煤岩层"凹"状时对周期来压步距有延缓作用,当煤岩层"凸"状时对来压步距有促进作用。
To analyze the influence of coal seam thickness and shape on weighting interval,beam-type mechanical model is applied to analyze the first and periodic weighting interval of coal seam. The field periodic weighting condition and the variation of seam thickness and shape is monitored in J7401 working face of He Lin mine. The theoretical results and the measurement data are compared,combining with the coal seam distribution graph and the weighting characteristics graph,the result shows that,when the coal seam thickness is smaller the periodic weighting step is relatively higher. And the concave shape of coal seam may lessen the periodic weighting step,while the convex shape may do the opposite.
出处
《煤炭工程》
北大核心
2016年第6期68-70,共3页
Coal Engineering
基金
国家自然科学基金资助项目(51174109)
关键词
不稳定煤层
煤层厚度
煤层形状
来压规律
来压步距
unstable coal seam
coal seam thickness
coal seam shape
regularity of roof weighting
weighting interval
