高瓦斯煤层覆岩空间破裂微震探测及应用

为了解决主焦煤矿2308工作面开采过程中瓦斯隐患，利用理论计算方法对采动过程中冒落带及裂隙带高度等进行计算，并结合微震监测技术手段对采面回采过程中覆岩微震事件进行监测记录，以此分析采动裂隙带的空间位置，进而得到上覆岩层瓦斯富集区的空间位置，研究发现微震监测手段得到的采动裂隙带高度与理论计算的结果相近，即采动裂隙带高度在38m左右，工作面回采期间周期来压步距在14m左右。据此对高位瓦斯抽采钻孔进行优化设计，并对其抽采效果进行检验，发现优化后的高位钻孔瓦斯抽采量提升了162%，瓦斯抽采体积分数提升了210%，表明利用微震监测技术探测瓦斯富集区是可靠的。

Microseismic Detection and Application of Spatial Rupture of Overburden Rock in High Gas Coal Seam

In order to solve the hidden danger of gas in the mining process of the 2308 working face of the main coking coal mine, the theoretical calculation method was used to calculate the height of the fall zone and the fissure zone during mining, and combined with the microseismic monitoring technology to cover the rock during the mining Monitor and record the microseismic events to analyze the spatial position of the mining fracture zone, and then obtain the spatial position of the gas enrichment zone in the overlying strata. The study found that the height of the mining fracture zone obtained by the microseismic monitoring method is close to the theoretical calculation result, namely The height of mining fissure zone is about 38m, and the period of stepping pressure during working face mining is about 14m. Based on this, the high gas drainage borehole was designed and its drainage effect was tested. It was found that the gas drainage volume increased by 162% and the gas drainage volume fraction increased by 210%, indicating that the use of microseismic monitoring technology to detect gas enrichment the zone is reliable.