大柳塔煤矿52304综采面过沟谷地形矿压显现实测

Site Observation on Mine Pressure Behavior when No.52304 Fully Mechanized Coal Mining Face Passing through Valley Terrain in Daliuta Mine

针对大柳塔煤矿5-2煤三盘区7m大采高首采面过沟谷地形时是否发生动载矿压的问题,采用关键层位置判别方法对52304综采面过沟谷地形阶段的主关键层位置进行了判别,结果表明过沟谷地形阶段的主关键层未被侵蚀,其较完整且距5-2煤层较远,预计不会发生动载矿压,并得到实际开采的验证。实测结果表明:52304工作面过沟谷地形上坡段时周期来压步距平均为13.97m,支架循环末阻力平均16723kN,动载系数1.51,矿压显现正常。

According to the dynamic mine pressure problem occurred when a first mechanized 7m high cutting coal mining face in No. 3 mining panel of No. 5 - 2 seam in Daliuta Mine, the location distinguishing method of the key stratum was applied to distinguish the main key stratum location when No. 52304 fully mechanized coal mining face passing through the valley terrain section. The results showed that the main key stratum at the valley terrain section passed through was not eroded. The main key stratum was well complete and had a long distance to No. 5 -2 seam. There was no dynamic mine pressure occurred as predicted and was approved by the actual mining. The site measured results showed that during the No. 52304 coal mining passing through the rise slope of the valley terrain, the periodical weighting interval was 13.97m, the average circulated end resistance of the hydraulic powered support was 16723kN, the dynamic load coefficient was 1.51 and the mine pressure behavior was normal.