Layer-crossing drill hole arrangement method for lower protective layer of long-distance coal seam

• Main Authors: JIANG ZHONGYANG, XIN YAJUN, LEI YUN, LI GUANGZENG, LIAN HONGQUAN, YANG JUNPENG, GAO ZHONGGUO, MENG FANCHAO, ZHANG SHAOJIE, LIU YONG
• Format: Patent
• Language: Chinese; English
• Published: 11.10.2022
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS

The invention discloses a long-distance coal seam lower protection layer crossing drill hole arrangement method. The method is characterized by comprising the following steps of lower protection layer working face arrangement, protection layer crossing drill hole drill site arrangement, layer crossing drill hole drill site parameter determination, layer crossing drill hole position arrangement and layer crossing drill hole drop point interval determination. The system is simple and easy to operate and construct, reasonable arrangement of the layer-penetrating drill holes of the protected layer under the long-distance lower protection layer mining condition can be achieved, the gas permeability of the coal seam is improved, meanwhile, the drill hole gas extraction efficiency can be improved, and the better outburst elimination effect is achieved. 本发明公开一种远距离煤层下保护层穿层钻孔布置方法，其特征在于：包括以下步骤：下保护层工作面布置，保护层穿层钻孔钻场布置，穿层钻孔钻场参数确定，穿层钻孔位置排布，穿层钻孔落点间距确定。本发明系统简单，易于操作和施工，可以实现远距离下保护层开采条件下被保护层穿层钻孔的合理布置，改善煤层透气性的同时，能够提高钻孔瓦斯抽采效率，达到更好的