CAJ | 학술논문

针对当前我国软煤层存在着钻进难、护孔难、增透难等问题,提出了在煤层顶/底板施工抽采钻孔的类保护层抽采瓦斯方法.通过岩体加载试验,研究了岩石的应力—渗透率—时间之间的定性关系,分析了岩石的破裂压力；探讨了软、硬煤层在类保护层开采模式下瓦斯的运移产出机理；构建了类保护层钻孔采前、采中、采后抽采模式.通过在鹤壁中泰矿业公司进行类保护层单孔抽采试验并使用 CYT技术进行强化范围探测,结果表明,类保护层抽采钻孔单孔强化范围可达1601 m2,在抽采计量的近5个月内,单孔抽采纯量平均328 m3/d,最大661 m3/d.
침대당전아국연매층존재착찬진난、호공난、증투난등문제,제출료재매층정/저판시공추채찬공적류보호층추채와사방법.통과암체가재시험,연구료암석적응력—삼투솔—시간지간적정성관계,분석료암석적파렬압력；탐토료연、경매층재류보호층개채모식하와사적운이산출궤리；구건료류보호층찬공채전、채중、채후추채모식.통과재학벽중태광업공사진행류보호층단공추채시험병사용 CYT기술진행강화범위탐측,결과표명,류보호층추채찬공단공강화범위가체1601 m2,재추채계량적근5개월내,단공추채순량평균328 m3/d,최대661 m3/d.
In view of the current problems of difficulties in drilling,borehole supporting and the enhancement of permeability in soft coal seams in our country,the gas drainage of similar protective layer during the construction of coal seam roof and floor was proposed.Through the loading test of rock mass,the quantitative relationship of rock stress-permeability-time was stud-ied,the fracture pressure of rock was analyzed,the gas migration and emission mechanism dur-ing the similar protective layer mining for soft or hard coal were discussed,and the gas drainage modes before,during and after drainage were established.The gas drainage from a single bore-hole in similar protective layer was tested in Hebi Zhongtai Mining Company and the CYT tech-nique was adopted to strengthen the detection range.The results show that the strengthening range of single borehole is up to 1601 m2 ,the average amount of gas drainage is 328 m3/d,and the maximum amount is up to 6 6 1 m3/d in the past 5 months.