上下山同时开采

Simultaneous Mining Up-dip and Downdip

我局现有14对矿井,可采和局部可采煤层10～12层,自上而下分为丙、丁、戊、己、庚5个煤组。煤层赋存比较稳定,倾角小于15°的占94.3％。己组煤下伏太原群灰岩有突然透水的危险,曾两次发生淹井事故。五、七、八矿为高沼气矿井,其余为低沼气矿井。原设计矿井走向长2000～5000m,上山斜长600～700m。水平回收率一般在60％左右,这样使第一水平的服务年限由原18年普遍降到14年。

Since 1965 the simultanecus mining updip and down-dip was adopted respectively in No.4 No.1 No.6 No.10 and No.7 collieries,pingdingshan Coal Administration and had got better effects.Nowadays there are 21 down-dip mining sections which are approximately 50％ of total section numbers of the Administration,the annual output is above 7 millin ton which is 60％ of total annual output of the Administration,The practice has shown that it has following advantages: 1 Level reserves and service life increace approximately in one time,so that number of mining level can be reduced. 2 Resulting in centralization of mining and increasing in per unit yield. 3 Decreasing in length of total openings,mine construction period and in,estment ot per ton of coal. 4 Adaptable to fully-mechanized mining. 5 Comparatively lower investment,going into production earlier,having important signifacation to national economy development.