摘要
通过开采保护层降低高突出煤层的危险性,作为一种有效的保护措施,在煤矿开采中得到广泛应用。而准确探究近距离煤层下保护层卸压范围,对合理布置保护层,提高卸压效率显得尤为重要。在过去,我们一般认为倾向卸压角度为80°左右,沿走向的保护范围卸压角在56°～60°左右。本文在前人研究的基础上,通过数值模拟及现场考察等方法,获得了近水平上被保护层工作面走向上和倾向上的煤层膨胀变形规律,在下保护层的设计中,为相对原来规定的范围增加扩界区域提供一定的理论支持。走向上通过对其卸压瓦斯的抽采,扩界区域同样可处于有效保护范围内,即走向卸压角可由56°提高至90°左右。倾向上可考虑将卸压角度由80°增大为90°,实现保护层与被保护层的等宽布置。并以淮南朱集矿1111(1)工作面首采保护层的现场监测数据做对照,分析结果与实际值相符。
As a kind of effective protection measures to reduce the risk of high outburst seam mining protective layer are widely used in coal mine. And accurate inquiry under the coal seam pressure--relief range near distance, the reasonable arrangement of protective layer is particularly important to improve the unloading efficiency. In the past, we generally tend to relief angle is about 80 degrees, the scope of protection to the relief angle from 56 ° to 60 °. In this paper, on the basis of previous studies, through the method of numerical simulation and field investigation, was nearly level by the protection layer face direction and tendency of coal swelling deformation, in the design of layer of protection, the original provisions for the relative range increasing bounded region provide theoretical support. The trend of the pressure relief gas drainage, expanding the circle area can also be in effective within the scope of protection, namely strike pressure--relief angle from 56 ° to 90 °. The tendency is considered to be the pressure relief angle from 80 ° to 90 ° as increased, the protective layer and the protection layer width layout. Taking Huainan Zhuji coal mine 1111 （1） working first mining field monitoring data protection layer as the control, the simulation results correspond with the actual value.
出处
《安徽建筑工业学院学报（自然科学版）》
2013年第2期58-62,共5页
Journal of Anhui Institute of Architecture(Natural Science)
基金
国家自然科学基金(41172147
50744015)
安徽省科技攻关项目(12010402110)
关键词
综采工作面
瓦斯治理
卸压角
扩界
fully mechanized coal face
gas control
pressure angle
expanding circles
作者简介
靳明（1987-），男，硕士研究生，主要研究方向为安全工程。
