卸压瓦斯抽采钻孔终孔合理位置确定方法  

Determination Method for Borehole Bottom Location of Pressure-relief Gas Extraction Boreholes

作　　者：解俊祥[1] 王红胜[2,3] 樊启文[1] 双海清 赵晓东[1] 杜政贤 由临东 

机构地区：[1]霍州煤电集团有限责任公司李雅庄煤矿,山西霍州031408 [2]西安科技大学能源学院,陕西西安710054 [3]西部矿井开采及灾害防治教育部重点实验室,陕西西安710054

出　　处：《煤矿安全》2015年第9期16-19,共4页Safety in Coal Mines

基　　金：国家重点基础研究计划(973计划)资助项目(2015CB251600)

摘　　要：准确掌握裂隙带发育高度以及合理布置抽采钻孔终孔位置是提高卸压瓦斯抽采效果的关键。针对李雅庄煤矿2-603工作面地质条件,采用了理论计算、数值模拟及钻孔抽采试验等方法确定了合理的钻孔终孔位置。首先,理论计算裂隙带平均高度为32.8～44 m。其次,数值模拟分析表明了裂隙带集中分布在距离底板13～25 m、38.6～50 m、上山采动角62°的范围内。最后,在高抽巷内向裂隙带内不同层位布置6个抽采钻孔,通过钻孔抽采效果对比分析确定钻孔合理终孔位置位于顶板44 m处。该方法可在类似地质条件下推广应用。To master the height of the fractured zone and to arrange drainage borehole＇s bottom location are the key to improve the effect of the pressure- relief gas extraction. Aiming at the geological conditions of the Liyazhuang Mine 2- 603 working face,the reasonable drainage borehole＇s bottom location was determined by the method of theoretical calculation,numerical simulation and drilling extraction test. Firstly,the average height of the fractured zone was 32. 8 m to 44 m by the theoretical calculation. Secondly,the numerical simulation analysis showed that the fractured zone was at the height of 13 m to 25 m,38. 6 m to 50 m to the floor,and in the rise- entry mining angle of 62°. Finally,in the high level gas drainage roadway,six drainage boreholes were arranged in the different layers of the fractured zone. The reasonable location of the borehole bottom was at the height of 44 m to the roof based on the gas extraction effect of the borehole. The method can be applied in the similar geological conditions.

关 键 词：卸压瓦斯 裂隙带 高抽巷 抽采钻孔 终孔位置 

分 类 号：TD712[矿业工程—矿井通风与安全]