中国煤炭
中國煤炭
중국매탄
CHINA COAL
2014年
7期
122-125
,共4页
突出煤层%保护层开采%被保护层%卸压增透%煤层透气性%移近量
突齣煤層%保護層開採%被保護層%卸壓增透%煤層透氣性%移近量
돌출매층%보호층개채%피보호층%사압증투%매층투기성%이근량
outburst coal seam%protective coal seam mining%protected coal seam%pressure relief and permeability enhancement%permeability of coal seam%displacement
针对豫西煤田煤层赋存情况及地质状况,设计了被保护层的卸压抽采方案及考察钻孔,对瓦斯基础参数和二1煤层的煤层顶底板移近量进行了测定.研究结果表明,二1煤层在受到保护层开采后,煤层瓦斯压力由原始的0.9 MP a降为0.12 MP a ,原始瓦斯含量由以前的6.52 m3/t降为3.1 m3/t,顶底板膨胀变形量达到20.6‰,煤层透气性系数增大了810倍,在卸压区内完全消除了二1煤层12112工作面的突出危险性.
針對豫西煤田煤層賦存情況及地質狀況,設計瞭被保護層的卸壓抽採方案及攷察鑽孔,對瓦斯基礎參數和二1煤層的煤層頂底闆移近量進行瞭測定.研究結果錶明,二1煤層在受到保護層開採後,煤層瓦斯壓力由原始的0.9 MP a降為0.12 MP a ,原始瓦斯含量由以前的6.52 m3/t降為3.1 m3/t,頂底闆膨脹變形量達到20.6‰,煤層透氣性繫數增大瞭810倍,在卸壓區內完全消除瞭二1煤層12112工作麵的突齣危險性.
침대예서매전매층부존정황급지질상황,설계료피보호층적사압추채방안급고찰찬공,대와사기출삼수화이1매층적매층정저판이근량진행료측정.연구결과표명,이1매층재수도보호층개채후,매층와사압력유원시적0.9 MP a강위0.12 MP a ,원시와사함량유이전적6.52 m3/t강위3.1 m3/t,정저판팽창변형량체도20.6‰,매층투기성계수증대료810배,재사압구내완전소제료이1매층12112공작면적돌출위험성.
In view of the coal seam occurrence condition and geological condition of the west-ern region of Henan Province,the gas pressure releasing and drainage in protective coal seam was designed and the drilling design was investigated. In addition,the gas parameters and the dis-placement of roof and floor of B1 coal seam were determined. The research results showed that after the protective seam mining,coal seam gas pressure was decreased from the original 0.9 MPa to 0.12 MPa,the original gas content was reduced from the previous 6.52 m3/t to 3.1 m3/t,the expansion deformation of roof and floor reached 20.6 ‰,and the coal seam permeability coefficient was increased 810 times,so that the outburst danger at No. 12112 working face of B1 coal seam was eliminated in the pressure released area.
