摘要
为研究采动覆岩中卸压瓦斯富集区的影响规律,以采动裂隙椭抛带理论为基础,建立采高影响下采动卸压瓦斯富集区的模型,运用物理相似模拟试验方法,以山西某高瓦斯矿井主采工作面为原型,揭示综采工作面采动卸压瓦斯富集区的采高控制机理。研究结果表明:随着采高的增大,三带高度也逐渐增大,采高与采动覆岩裂隙的三带高度呈现线性关系,采高与三带高度的拟合曲线斜率处于2~4范围之间。而随着工作面推进,上覆岩层逐渐形成了压实区和裂隙区,压实区随着采高的增大而变小,裂隙区随着采高的增大而变大。通过对不同采高的各岩层的离层量拟合关系分析,发现不同采高开挖后形成的裂隙形态呈现对称的椭抛面,最后通过拟合关系建立了采高影响下的二维采动卸压瓦斯富集区的模型,为采动覆岩卸压瓦斯富集区的识别提供一定的理论基础。
In order to study the influence of the mining height on the pressure relief gas enrichment area,using the theory of mining fracture parabolic zone,a model of mining pressure relief gas concentration area under the influence of mining height was established.Taking the main working face of a high gas mine in Shanxi Province as an example,by using the physical similarity simulation test method,the control mechanism of the mining height of the fully mechanized working face to the mining pressure relief gas enrichment area was discussed.The results show that with the increase of mining height,the height of“three zones”also increases gradually,the mining height and the height of“three zones”show a linear relationship,and the slope of the fitting curve is 2~4;with the advance of the working face,the overburden gradually forms the compaction area and fracture area,the compaction area decreases with the increase of mining height,and the fracture area increases with the increase of mining height.Through the analysis of the fitting relationship of the separation amount of different strata under different mining heights,it is found that the fractures formed by different mining heights show symmetrical ellipsoidal shape.Finally,the model of two-dimensional mining pressure relief gas enrichment area under the influence of mining height is established by fitting relationship,which provides a theoretical basis for the identification of mining pressure relief gas enrichment area.
作者
朱兴攀
邓增社
贺斌雷
杨琛
ZHU Xing-pan;DENG Zeng-she;HE Bin-lei;YANG Chen(Shaanxi Coal Chemical Industry Technology Research Institute Co.,Ltd.,Xi’an 710065,China;National and Local United Engineering Research Center of Green Safe and Efficient Coal Mining,Xi’an 710065,China;Research Center of Coal Green Mining Engineering in Coal Industry,Xi’an 710065,China)
出处
《陕西煤炭》
2020年第S01期109-113,共5页
Shaanxi Coal
关键词
采动覆岩
瓦斯富集区
物理相似模拟
椭抛带
mining overburden rock
gas enrichment area
physical similarity simulation
parabolic zone
