江西煤炭科技
江西煤炭科技
강서매탄과기
JIANGXI COAL SCIENCE & TECHNOLOGY
2014年
2期
7-9
,共3页
煤与瓦斯突出%下保护层%瓦斯抽采
煤與瓦斯突齣%下保護層%瓦斯抽採
매여와사돌출%하보호층%와사추채
coal and gas outburst%protective layer%gas extraction
大河煤矿7＃煤层属于高瓦斯突出煤层，下临近10＃煤层为无突出危险性煤层，采用开采下保护层的方法，以降低7＃煤层地应力和瓦斯压力，增大被保护层煤层的透气性，消除7＃煤层开采过程中瓦斯突出的危险；根据大河煤矿实际工程地质条件，计算得出下保护层沿倾斜方向、走向方向的保护范围和保护层与被保护层之间的有效垂距；通过区域验证，进行下保护层开采和瓦斯抽采后7＃煤层达到安全开采要求，保证了该煤层安全生产。
大河煤礦7＃煤層屬于高瓦斯突齣煤層，下臨近10＃煤層為無突齣危險性煤層，採用開採下保護層的方法，以降低7＃煤層地應力和瓦斯壓力，增大被保護層煤層的透氣性，消除7＃煤層開採過程中瓦斯突齣的危險；根據大河煤礦實際工程地質條件，計算得齣下保護層沿傾斜方嚮、走嚮方嚮的保護範圍和保護層與被保護層之間的有效垂距；通過區域驗證，進行下保護層開採和瓦斯抽採後7＃煤層達到安全開採要求，保證瞭該煤層安全生產。
대하매광7＃매층속우고와사돌출매층，하림근10＃매층위무돌출위험성매층，채용개채하보호층적방법，이강저7＃매층지응력화와사압력，증대피보호층매층적투기성，소제7＃매층개채과정중와사돌출적위험；근거대하매광실제공정지질조건，계산득출하보호층연경사방향、주향방향적보호범위화보호층여피보호층지간적유효수거；통과구역험증，진행하보호층개채화와사추채후7＃매층체도안전개채요구，보증료해매층안전생산。
No .7 seam of Dahe Colliery belongs to high gas outburst seam ,where close to No .10 seam belongs to non-outburst seam ,mining under -protecting coal stratum was adopted to reduce stress and gas pressure of No .7 seam ,increase permeability of protected layer seam and eliminate gas outburst in the mining at No .7 seam . According to the actual engineering geological conditions ,protection scope of under -protecting coal stratum ver-gence direction and tendency direction ,effective vertical distance between protective layer and protected layer were calculated ,which proved No .7seam meet safety mining requirement after under -protecting coal stratum mining and gas extraction ,and ensured safety production of the seam .
