Characteristics of mining gas channel and gas flow properties of overlying stratum in high intensity mining
Characteristics of mining gas channel and gas flow properties of overlying stratum in high intensity mining
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发表时间：
2012
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通讯作者：
Xu Chao
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作者：
Xu Chao
根据覆岩破碎、裂缝发育情况，裂缝直径大于10-1 mm的层位为开采瓦斯通道发育区。基于楔梁结构理论，研究了关键地层下覆岩瓦斯通道发育特征，建立了基于Kozeny-Carman准则的瓦斯通道内瓦斯流动模式识别方法，将覆岩划分为湍流通道区、过渡环流区最后,通过阳泉煤炭工业(集团)有限责任公司新井煤矿80201工作面现场试验,反演瓦斯通道演化规律及其对瓦斯导流的影响,根据瓦斯通道内瓦斯格局,建立了以高位抽吸巷道为主要手段的过渡循环通道区瓦斯格局人工导流方法,验证了修正效果。以及本文提出的开采瓦斯通道理论方法和分类的合理性。
According to the breakage and fracture developing of overlying strata,the layer with fracture diameter of more than 10-1 mm is the mining gas channels development area.Based on the theory of voussoir beam structure,the characteristic of gas channel development in the overburden under the key stratum was studied,and the identification method of the gas pattern were established for gas flow in gas channel based on Kozeny-Carman criterion.Then the overlying rock was divided into turbulent channel area,transitional circulation channel area and seepage channel area,according to the gas pattern in gas channels,and the artificial diversion method for transitional circulation channel area was set up by taking high level suction roadway as main means.Finally,the evolution law of gas channel and its influence on gas guidance flow was inversed by field test at working face 80201 in Xinjing Coal Mine of Yangquan Coal Industry(Group) Co.,Ltd.,and the gas pattern was classified for transitional circulation channel area,which verified the correction and rationality of the theoretical method and the classification for mining gas channel proposed in this paper.