顺层长钻孔超高压水力割缝设备及技术研究
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摘要
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.
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.
引文
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[2]林柏泉,孟凡伟,张海宾.基于区域瓦斯治理的钻割抽一体化技术及应用[J].煤炭学报,2011,36(1):75-79.
[3]张连军,林柏泉,高亚明.基于高压水力割缝工艺的煤巷快速消突技术[J].煤矿安全,2013,44(3):64-66.
[4]童碧,王力.下向穿层孔水力割缝施工工艺研究与应用[J].煤炭科学技术,2017,45(8):177-180,188.
[5]吴教锟.水力割缝增透技术在石门揭煤中的应用[J].煤矿开采,2017,22(2):93-95.
[6]朱红青,廖文涛.水力割缝喷嘴优化及瓦斯抽采应用[J].煤炭技术,2017,36(3):165-167.
[7]黄春明,代志旭,郭明功.高压水射流割缝增强瓦斯抽采及防喷孔技术研究[J].煤炭科学技术,2015,43(4):63-66,109.
[8]刘生龙,周玉竹,邱居德,等.超高压水力割缝在坚硬突出煤层石门揭煤预抽瓦斯防突措施中的应用[J].矿业安全与环保,2017,44(5):64-67.
[9]李经国,戴广龙,李庆明,等.低透煤层水力压裂增透技术应用[J].煤炭工程,2016,48(1):66-69.
[10]葛兆龙,梅绪东,贾亚杰,等.高压水射流割缝钻孔抽采影响半径研究[J].采矿与安全工程学报,2014,31(4):657-664.
[11]王耀锋,何学秋,王恩元,等.水力化煤层增透技术研究进展及发展趋势[J].煤炭学报,2014,39(10):1945-1955.
[12]冯宝兴,黄春明,张连军.高压水力割缝技术在底板穿层预抽煤层瓦斯中的应用[J].煤炭工程,2010,42(6):35-37.