官地矿9号煤层复合顶板巷道支护的优化设计

Optimization Design of Roadway Support with Compound Roof in No.9 Seam in Guandi Mine

官地矿8号、9号煤层间距只有0.2～2.3m,从前一般只采8号煤,基本丢弃9号煤层,为了提高煤炭资源回采率,延长矿井服务年限,官地矿采九放八29401综放工作面于2010年5月投产,但因层间距较小,29401工作面采用锚喷联合支护的效果不是很好.官地矿以28416工作面为试验场地,终于找到了新型的支护方式,很好地解决了存在问题.

The spacing between No. 8 and No. 9 seam ranges from 0.2 to 2.3 meters. We used to mine only from No. 8 seam, while the coal in No. 9 seam were basically forgone. To increase the recovery rate of coal resources and to extend the service life of the mine, No. 29401 fully-mechanized working face was put into production in May, 2010. However, because of small layer interval, the combined support effect was not ideal. Therefore, taking 28416 working face as the experiment field, the new supporting way was found at last,which could solve the problem effectively.