矿业安全与环保
礦業安全與環保
광업안전여배보
MINING SAFETY & ENVIRONMENTAL PROTECTION
2015年
1期
23-27
,共5页
顺层交错式钻孔%顺层长钻孔%煤层透气性系数%煤层原始瓦斯压力%钻孔累计抽放瓦斯量
順層交錯式鑽孔%順層長鑽孔%煤層透氣性繫數%煤層原始瓦斯壓力%鑽孔纍計抽放瓦斯量
순층교착식찬공%순층장찬공%매층투기성계수%매층원시와사압력%찬공루계추방와사량
staggered borehole along seam%long borehole along seam%gas permeability of coal seam%original gas pressure of coal seam%accumulative gas drainage quantity per borehole
为了得到采取顺层长钻孔措施和顺层交错钻孔措施的瓦斯抽放效果，建立了顺层平行钻孔预抽煤层瓦斯数学模型，并采用有限体积法模拟计算出不同时刻钻孔周围煤体瓦斯压力分布与钻孔累计抽放瓦斯量。模拟结果表明，合理的顺层单向钻孔和顺层交错钻孔布置，对于预抽回采区域煤层瓦斯均取得良好效果；顺层钻孔抽放瓦斯效果与煤层渗透率、煤层原始瓦斯压力及煤层钻孔布置密切相关。
為瞭得到採取順層長鑽孔措施和順層交錯鑽孔措施的瓦斯抽放效果，建立瞭順層平行鑽孔預抽煤層瓦斯數學模型，併採用有限體積法模擬計算齣不同時刻鑽孔週圍煤體瓦斯壓力分佈與鑽孔纍計抽放瓦斯量。模擬結果錶明，閤理的順層單嚮鑽孔和順層交錯鑽孔佈置，對于預抽迴採區域煤層瓦斯均取得良好效果；順層鑽孔抽放瓦斯效果與煤層滲透率、煤層原始瓦斯壓力及煤層鑽孔佈置密切相關。
위료득도채취순층장찬공조시화순층교착찬공조시적와사추방효과，건립료순층평행찬공예추매층와사수학모형，병채용유한체적법모의계산출불동시각찬공주위매체와사압력분포여찬공루계추방와사량。모의결과표명，합리적순층단향찬공화순층교착찬공포치，대우예추회채구역매층와사균취득량호효과；순층찬공추방와사효과여매층삼투솔、매층원시와사압력급매층찬공포치밀절상관。
In order to obtain the gas drainage effect by both long and short staggered parallel boreholes along the coal seam, a mathematical model for gas drainage by parallel boreholes drilled along the coal seam was established and the finite volume method was applied to simulate the gas pressure distribution in coal body around the borehole and the accumulative gas drainage quantity per borehole at different time. The simulated results showed that the reasonable arrangement of both long and short staggered boreholes along the seam achieved good drainage effect; the gas drainage effect by the boreholes along the seam was closely related to the gas permeability and the original gas pressure of the coal seam and the borehole arrangement in the coal seam.
