离层注浆工作面采场瓦斯储集空间演化规律研究  

Study on evolution law of gas storage space in stope of overburden-separation grouting working face

作　　者：刘海东 刘厅[2] 沈家豪 施宇 LIU Haidong;LIU Ting;SHEN Jiahao;SHI Yu(Shanxi Coking Coal Xishan Coal Electricity Group Co.,Ltd.,Taiyuan 030053,China;China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]山西焦煤西山煤电集团有限责任公司,山西太原030053 [2]中国矿业大学,江苏徐州221116

出　　处：《矿业安全与环保》2025年第1期82-89,共8页Mining Safety & Environmental Protection

摘　　要：采场覆岩瓦斯储集空间是高位钻孔瓦斯抽采钻孔布置参数优化及瓦斯异常涌出防治的关键。采用数值模拟和现场测试相结合的方法,分析屯兰矿22301覆岩离层注浆充填工作面不同注浆压力下注浆充填前后采场裂隙分布及瓦斯储集空间的变化规律。结果表明:随着注浆压力增大,裂隙带高度逐渐减小,裂隙压实作用逐渐减弱;随着注浆压力增大,空间上的裂隙带高度及宽度均减小,采动裂隙环形体的范围逐渐收缩;随着水平方向上的采空区中部压实程度和范围不断增大,卸压区和自由空间的范围逐渐收缩;在离层注浆条件下,适当增大钻孔倾角、减小施工高度,可有效提升高位钻孔瓦斯抽采效果。研究成果可为离层注浆工作面卸压瓦斯抽采钻孔的优化布置提供借鉴和参考。The gas storage space in overlying strata of stope is the key to optimizing the layout parameters of gas extraction borehole and preventing abnormal gas emission.In this study,by combining numerical simulation and field test,the fracture distribution and gas storage space change law of the stope before and after grouting under different grouting pressure at 22301 overlying grouting in sepa-rated-bed face in Tunlan Mine were analyzed.The results show that when the grouting pressure increases,the fracture zone height decreases gradually,but the fracture compaction effect weakens gradually.Meanwhile,the height and width of the fissure zone in space decrease,and the range of mining-induced fissure ring gradually shrinks.In the horizontal direction,the compaction degree and range in the middle of the goaf are increasing,and the range of the relief zone and free space is gradually shrinking.Under the condition of overburden-separation grouting,the effect of gas extraction in high-level borehole can be effectively improved by appropriately increasing the angle of the borehole and reducing the construction height.The research results of this study can provide reference for the optimal layout of gas extraction borehole on the overburden-separation grouting working face.

关 键 词：离层注浆充填 注浆压力 裂隙环形体 瓦斯抽采钻孔 瓦斯储集空间 

分 类 号：TD712[矿业工程—矿井通风与安全]