顺层长钻孔超高压水力割缝设备及技术研究

Research on Ultrahigh-pressure Hydraulic Cutting Equipment and Technology for Long Bedding Drilling

为了提高高河矿+450m水平北翼进风大巷顺层钻孔瓦斯抽采效率,保证+450m水平北翼进风大巷安全、快速掘进,研发了适合高河矿3#煤特征的GF-100型超高压水力割缝装置,对高压水钻进、割缝一体化技术可行性和实施方案进行了研究,并对割缝效果进行初步考察。结果表明,在已施工的顺层抽采钻孔基础上直接进行水力割缝二次增透,可以使割缝孔的抽采半径增大到2. 4m,减少近50%的施工量;单孔瓦斯流量可提高1. 8～3. 6倍。水力割缝技术可有效提高低渗透煤层的瓦斯抽采效率,值得推广。

In order to improve the gas drainage efficiency of bedding drilling,and ensure the safety and rapid excavation of+450 mlevel north wing inlet wing of Gaohe Coal Mine,a GF-100 type ultrahigh-pressure hydraulic cutting device was developed according to the characteristics of No. 3 coal seam in Gaohe Coal Mine,and the cutting effect was preliminarily inspected. The results show that the second increase in the penetration of the hydraulic slats directly on the foundation of the dredging drilled hole can increase the extraction radius of the slotted hole to 2. 4 m and reduce the construction volume by nearly 50%. Gas flow can be increased 1. 8 to 3. 6 times. Hydraulic kerf technology can effectively improve the gas drainage efficiency of low permeability coal seams and is worthy of promotion.