突出预测指标钻屑量影响因素研究

煤与瓦斯突出事故已成为当前严重的矿山灾害之一,钻屑指标法是预测该事故的常用方法。分析了煤体物理力学性质、矿山压力、瓦斯压力及测定误差对钻屑量大小的影响。总结出在钻孔半径一定的条件下,钻屑量与煤体的容重、泊松比、煤的弹性模量、矿山压力、瓦斯压力的关系。最后对影响钻屑量测定准确度的因素(钻杆的弯曲程度和连接形式,钻孔施工速度,人为因素和设备因素等)进行了归纳,提出了定期检查和检修设备、加强预测人员专业知识培训、规范操作等改进意见,以便提高预测煤与瓦斯突出的准确性和可靠性。 Coal and gas outburst accidents now have become one of the most serious coal mine accidents.The drilling cuttings index method is commonly used to predict the accident.Analyzed the influence of physical-mechanical properties of coal,underground pressure and gas pressure etc.on drill cuttings quantity.When the drilling radius is certain,concluded the relationship between volume weight of mine,Poisson's ratio,modulus of elasticity,underground pressure,gas pressure and drill cuttings quantity.At last,summed up some factors curvature and connecting format of drilling stem,drilling rate,personal factors and equipment factors etc.,which lead to inexact drill cutting quantity data.Termly inspecting equipments,providing professional knowledge training for forecasting workers,normalizing operation etc.,were proposed,which can improve the accuracy and reliability of coal and gas outburst forecast